New Record Set For Data Transmission

OFC

IBM Researchers Set Milestone, which Suggests Existing Technology for Short-Range Data Transmission May be Fast Enough for Years to Come

Researchers at IBM have set a new record for data transmission over a multimode optical fiber, a type of cable that is typically used to connect nearby computers within a single building or on a campus. The achievement demonstrated that the standard, existing technology for sending data over short distances should be able to meet the growing needs of servers, data centers and supercomputers through the end of this decade, the researchers said.

Sending data at a rate of 64 gigabits per second (Gb/s) over a cable 57 meters long using a type of laser called a vertical-cavity surface-emitting laser (VCSEL), the researchers achieved a rate that was about 14 percent faster than the previous record and about 2.5 times faster than the capabilities of today’s typical commercial technology.

To send the data, the researchers used standard non-return-to-zero (NRZ) modulation. “Others have thought that this modulation wouldn’t allow for transfer rates much faster than 32 Gb/s,” said researcher Dan Kuchta of the IBM T.J. Watson Research Center in New York. Many researchers thought that achieving higher transmission rates would require turning to more complex types of modulation, such as pulse-amplitude modulation-4 (PAM-4).

“What we’re showing is that that’s not the case at all,” Kuchta said. Because he and his colleagues achieved fast speeds even with NRZ modulation, he added, “this technology has at least one or two more generations of product life in it.”

Kuchta will describe these results at the 2014 OFC Conference and Exposition, being held March 9-13 in San Francisco.

To achieve such high speeds, the researchers used the VCSEL lasers developed at Chalmers University of Technology in Sweden and custom silicon-germanium chips developed at IBM Research. “The receiver chip is a unique design that simultaneously achieves speeds and sensitivities well beyond today’s commercial offerings,” Kuchta explained. “The driver chip incorporates transmit equalization, which widens the bandwidth of the optical link. While this method has been widely used in electrical communication, it hasn’t yet caught on in optical communication,” he said.

“Researchers typically rely on a rule of thumb that says the usable data-transfer rate is about 1.7 times the bandwidth,” Kuchta explained. “That means that with the VCSEL laser, which has a bandwidth of about 26 GHz, the rate would be only about 44 Gb/s.”

“What we’re doing with equalization is we’re breaking the historical rule of thumb,” Kuchta said.

The fast speeds only worked for a distance of 57 meters, so this technology isn’t designed for sending data across continents. Instead, it’s most suitable for transmitting data within a building, he said. About 80 percent of the cables at data centers and most, if not all, of the cables used for typical supercomputers are less than 50 meters long.

This new technology, Kuchta added, is ready for commercialization right now.

Presentation Th3C.2, titled “64Gb/s Transmission over 57m MMF using an NRZ Modulated 850nm VCSEL,” will take place Thursday, March 14 at 1:30 p.m. in room 121 of the Moscone Center.

PRESS REGISTRATION: A press room for credentialed press and analysts will be located in the Moscone Center, Sunday through Thursday, March 9-13. Those interested in obtaining a press badge for OFC should contact Lyndsay Meyer at 202.416.1435 or [email protected].

Group Calling For FDA To Revoke Pain Killer Approval

Lee Rannals for redOrbit.com – Your Universe Online

A group of 40 organizations have joined together to try and influence the Food and Drug Administration (FDA) to revoke its approval of the prescription drug Zohydro.

The group of health care professionals and consumer and addiction treatment groups say they are “echoing the concerns” of members of Congress and the State Attorneys General regarding the FDA’s decision to approve Zohydro for use.

“On behalf of consumer safety organizations, health care agencies, addiction treatment providers, community-based drug and alcohol prevention programs, professional organizations, and other groups on the front-line of our nation’s opioid addiction epidemic, we ask you to put the public’s health ahead of industry interests,” the group wrote in the letter. “In the midst of a severe drug epidemic fueled by overprescribing of opioids, the very last thing the country needs is a new, dangerous, high-dose opioid.”

The organizations said if the FDA’s decision to approve the painkiller was based on existing policies, then those policies need “urgent revision.” The group is essentially pointing to the growing problems of prescription drug abuse in the country, where thousands of lives have been lost from overdose and hundreds of thousands of people have become addicted.

“Over the past 15 years, prescriptions for opioids have skyrocketed,” the letter read. “We implore you to take these painful lessons into account.”

According to the organizations, the US consumes more than 84 percent of the world’s entire oxycodone supply and more than 99 percent of the world’s hydrocodone supply, despite being only about 5 percent of the Earth’s population. The CDC says that the increase in prescription drug use has led to increases in addiction and overdose deaths.

“Since 1999, overdose deaths have skyrocketed, especially among middle-aged individuals prescribed opioids for chronic pain,” the group wrote. ”Opioid analgesic overdose deaths have increased by 415% in women and 265% in men.”

According to the group, Zohydro’s maker, Zogenix, said the drug is safer than existing hydrocodone products because it does not contain acetaminophen. However, the authors say the drug is not safe because it contains 5 to 10 times more hydrocodone than Vicodin or Lortab.

“Someone unaccustomed to taking opioids could suffer a fatal overdose from just two capsules. A single capsule could be fatal if swallowed by a child,” the group said.

They point out that patients who may be unable to take painkillers with acetaminophen already have alternatives.

“There is no need for another high-dose, single-entity opioid,” the group said. “Too many people have already become addicted to similar opioid medications and too many lives have been lost. We urge you to exercise your authority and responsibility to protect the public’s health by keeping Zohydro off the market.”

Despite the group’s claim, Zogenix says that the drug’s benefits outweigh the risks. Dr. Brad Galer, executive vice president and chief medical officer at Zogenix, told CNN in an email that they do not believe the drug will increase the overall use of opioids. He also said they will be focusing its marketing on doctors with good experience prescribing opioids so only appropriate patients would receive the drug.

New Snake Nebula Image Shows Stellar Nurseries

[ Watch the Video: Birth Of A Star A Family Affair ]
Lee Rannals for redOrbit.com – Your Universe Online
Astronomers using the Smithsonian’s Submillimeter Array (SMA) telescope have imaged the most detailed look yet of stellar nurseries within the Snake nebula.
The Snake nebula is about 11,700 light-years away from Earth towards the direction of the constellation Ophiuchus. The astronomers chose this nebula because it shows the potential to form many massive stars.
“To learn how stars form, we have to catch them in their earliest phases, while they’re still deeply embedded in clouds of gas and dust, and the SMA is an excellent telescope to do so,” lead author Ke Wang of the European Southern Observatory, who started the research as a predoctoral fellow at the Harvard-Smithsonian Center for Astrophysics, said in a statement.
The Snake nebula is a series of dark absorption clouds made up of molecular gas and interstellar dust grains. This absorption causes stars behind the clouds to be hidden from view, making it look as if there is a starless void in the sky.
The scientists studied two spots within the nebula, known as P1 and P6, which helped detect a total of 23 cosmic “seeds.” These seeds are faintly glowing spots that could eventually birth one or more stars. They generally weigh between 5 and 25 times the mass of the Sun, and each one spans a few thousand astronomical units, which is defined as the distance between the Earth and Sun.
Previous theories say that high-mass stars form within these cores weighing at least 100 times the mass of the Sun. The latest findings show that this is not true, and that massive stars aren’t born alone but in groups.
“High-mass stars form in villages,” Qizhou Zhang, from the Harvard-Smithsonian Center for Astrophysics and co-author of the paper published in the Monthly Notices of the Royal Astronomical Society, said in a statement. “It’s a family affair.”
The astronomers said they were surprised to find that these nebular patches had fragmented into individual star seeds so early in the star formation process. They were able to detect bipolar outflows and other signs of active, ongoing star formation. Eventually, the Snake nebula will dissolve and shine as a chain of several star clusters.

New Method Developed For Treatment Of Phantom Limb Pain After Amputation

[ Watch The Video: Treating Phantom Limb Pain After An Amputation ]

Johanna Wilde, Chalmers University of Technology

Max Ortiz Catalan, researcher at Chalmers University of Technology, has developed a new method for the treatment of phantom limb pain (PLP) after an amputation. The method is based on a unique combination of several technologies, and has been initially tested on a patient who has suffered from severe phantom limb pain for 48 years. A case study shows a drastic reduction of pain.

People who lose an arm or a leg often experience phantom sensations, as if the missing limb were still there. Seventy per cent of amputees experience pain in the amputated limb despite that it no longer exists. Phantom limb pain can be a serious chronic and deteriorating condition that reduces the quality of the person´s life considerably. The exact cause of phantom limb pain and other phantom sensations is yet unknown.

Phantom limb pain is currently treated with several different methods. Examples include mirror therapy, different types of medication, acupuncture and hypnosis. In many cases, however, nothing helps. This was the case for the patient that Chalmers researcher Max Ortiz Catalan selected for a case study of the new treatment method he has envisaged as a potential solution.

The patient lost his arm 48 years ago, and had since that time suffered from phantom pain varying from moderate to unbearable. He was never entirely free of pain.

The patient’s pain was drastically reduced after a period of treatment with the new method. He now has periods where he is entirely free of pain, and he is no longer awakened by intense periods of pain at night like he was previously.

The new method uses muscle signals from the patient’s arm stump to drive a system known as augmented reality. The electrical signals in the muscles are sensed by electrodes on the skin. The signals are then translated into arm movements by complex algorithms. The patient can see himself on a screen with a superimposed virtual arm, which is controlled using his own neural command in real time.

“There are several features of this system which combined might be the cause of pain relief” says Max Ortiz Catalan. “The motor areas in the brain needed for movement of the amputated arm are reactivated, and the patient obtains visual feedback that tricks the brain into believing there is an arm executing such motor commands. He experiences himself as a whole, with the amputated arm back in place.”

Modern therapies that use conventional mirrors or virtual reality are based on visual feedback via the opposite arm or leg. For this reason, people who have lost both arms or both legs cannot be helped using these methods.

“Our method differs from previous treatment because the control signals are retrieved from the arm stump, and thus the affected arm is in charge” says Max Ortiz Catalan. “The promotion of motor execution and the vivid sensation of completion provided by augmented reality may be the reason for the patient improvement, while mirror therapy and medicaments did not help previously.”

A clinical study will now be conducted of the new treatment, which has been developed in a collaboration between Chalmers University of Technology, Sahlgrenska University Hospital, the University of Gothenburg and Integrum. Three Swedish hospitals and other European clinics will cooperate during the study which will target patients with conditions resembling the one in the case study – that is, people who suffer from phantom pain and who have not responded to other currently available treatments.

The research group has also developed a system that can be used at home. Patients will be able to apply this therapy on their own, once it has been approved. An extension of the treatment is that it can be used by other patient groups that need to rehabilitate their mobility, such as stroke victims or some patients with spinal cord injuries.

Unique Imaging System Uses Scorpion Venom Protein And Laser To Light Up Tumors

Cedars-Sinai Medical Center
Cedars-Sinai animal study may lead to human trial of experimental, compact intraoperative device to aid removal of malignant brain tumors
Researchers at the Cedars-Sinai Maxine Dunitz Neurosurgical Institute and Department of Neurosurgery have developed a unique, compact, relatively inexpensive imaging device to “light up” malignant brain tumors and other cancers.
The experimental system consists of a special camera designed and developed at Cedars-Sinai and a new, targeted imaging agent based on a synthetic version of a small protein – a peptide – found in the venom of the deathstalker scorpion. The imaging agent, Tumor Paint BLZ-100, a product of Blaze Bioscience Inc., homes to brain tumor cells. When stimulated by a laser in the near-infrared part of the spectrum, it emits a glow that is invisible to the eye but can be captured by the camera.
Results of animal studies, published as the feature article in the February issue of Neurosurgical Focus, provide the basis for the launch of human clinical trials. The system would be used during surgery to determine if it enables neurosurgeons to remove more tumor and spare more healthy tissue.
Malignant brain tumors called gliomas are among the most lethal tumors, with patients typically surviving about 15 months after diagnosis. “We know that survival statistics increase if we can remove all of a tumor, but it is impossible to visualize with the naked eye where the tumor stops and brain tissue starts, and current imaging systems don’t provide a definitive view,” said Keith Black, MD, chair and professor of the Department of Neurosurgery, the article’s senior author.
“Gliomas have tentacles that invade normal tissue and present big challenges for neurosurgeons: Taking out too much normal brain tissue can have catastrophic consequences, but stopping short of total removal gives remaining cancer cells a head start on growing back. That’s why we have worked to develop imaging systems that will provide a clear distinction – during surgery – between diseased tissue and normal brain,” said Black, director of the Maxine Dunitz Neurosurgical Institute, director of the Johnnie L. Cochran, Jr. Brain Tumor Center and the Ruth and Lawrence Harvey Chair in Neuroscience.
In studies in laboratory mice with implanted human brain tumors, the new device clearly delineated tumor tissue from normal brain tissue. Also, with near-infrared light’s ability to penetrate deep into the tissue, the system identified tumors that had migrated away from the main tumor and would have evaded detection.
Pramod Butte, MBBS, PhD, research scientist and assistant professor in the Department of Neurosurgery, the article’s first author, said the tumor-imaging process consists of two parts: deploying a fluorescent “dye” that sticks only to cancer cells, and using a laser and a special camera to make an invisible image visible.
To get the dye to the tumor, it is linked to a peptide called chlorotoxin, which, contrary to its name, is not toxic. It completely ignores normal tissue but seeks out and binds to a variety of malignant tumor cells. It first was derived from the venom of the yellow Israeli scorpion, also called the deathstalker. Article co-author Adam Mamelak, MD, professor of neurosurgery and director of functional neurosurgery, has studied the synthetic version of chlorotoxin and its tumor-targeting properties for more than a decade.
In this study, chlorotoxin was bonded to a molecule, indocyanine green, a near-infrared dye, a version of which already is approved by the Food and Drug Administration. The chlorotoxin-indocyanine green combination – Tumor Paint BLZ-100 – emits a glow when stimulated by near-infrared light.
“Injected intravenously, the chlorotoxin seeks out the brain tumor, carrying with it indocyanine green, which has been used in a variety of medical imaging applications. When we shine a near-infrared laser on the tissue, the tumor glows. But the glow emitted by the tumor is invisible to the human eye,” said Butte, whose MBBS is India’s equivalent of an MD. The camera device, designed in Butte’s lab, solves this problem by capturing two images and combining them on a high-definition monitor.
“Other experimental systems we have seen – which use different tumor-targeting methods – are larger and bulkier because they consist of two cameras,” Butte said. “Our single-camera device takes both near-infrared and white light images simultaneously. This is achieved by alternately strobing the laser and normal white lights at very high speeds. The eye just sees normal light, but the camera is capturing white light once, near-infrared light next, over and over. We then superimpose the two HD images. The image from the laser shows the tumor, and the image produced from white light shows the visible ‘landscape’ so we can see where the tumor is in context to what we actually can see.”
The prototype is compact, but the authors said they are working to make the next generations even smaller, lighter and portable so the device will require very little space in operating room, allowing the neurosurgeon to focus on the operating microscope and give little attention on the imaging system. “We hope that eventually the camera can be transported in a small bag, but we are not sacrificing image quality for portability,” Butte said. “In fact, most systems that use two cameras lose a lot of light. But because of the special filters we use and the way we arrange them, we lose very little light. And from what we have seen and tested, our device provides about 10 times greater sensitivity and contrast than others.”
In an editorial accompanying the journal article, David W. Roberts, MD, from the Section of Neurosurgery at the Geisel School of Medicine at Dartmouth College, said the Cedars-Sinai “paper presents a newer direction in which fluorescence-guided surgery may well be headed.” He noted that the researchers overcame one of the limitations of near-infrared technology – that it is outside of the visible portion of the spectrum. “In this regard, Butte and colleagues have contributed to the field with their implementation of an optical system that is sensitive and efficient. They have characterized well its performance in phantom and animal models, demonstrating proof-of-concept and feasibility.”

Vitamin A May Play An Important Role In The Fight Against Tuberculosis

Rachel Champeau, University of California – Los Angeles Health Sciences

Tuberculosis is a major global problem, affecting 2 billion people worldwide and causing an estimated 2 million deaths annually. Western countries are once again tackling the disease, with recent outbreaks in Los Angeles and London.

The rise of drug-resistant TB, called a “ticking time bomb” by the World Health Organization, and the high cost of fighting the disease highlight the need for new approaches to treatment.

In findings published in the March 1 issue of the Journal of Immunology, UCLA researchers investigating the role of nutrients in helping the immune system fight against major infections show that vitamin A may play an important role combating TB.

The UCLA team describes for the first time the mechanism by which vitamin A and a specific gene assist the immune system by reducing the level of cholesterol in cells infected with TB. This is important because cholesterol can be used by TB bacteria for nutrition and other needs, the researchers said.

“If we can reduce the amount of cholesterol in a cell infected with tuberculosis, we may be able to aid the immune system in better responding to the infection,” said senior author Philip Liu, an assistant professor of medicine in the divisions of dermatology and orthopedic surgery at UCLA’s David Geffen School of Medicine and Orthopaedic Hospital Research Center. “Understanding how nutrients like vitamin A are utilized by our immune system to fight infections may provide new treatment approaches.”

Although vitamin A circulates in the body in an inactive form known as retinol, it’s the active form of the nutrient — all-trans reinoic acid — that is responsible for activating the immune system.

To investigate the role of this active form of vitamin A in immune defense, the UCLA team first compared its effects on cells to the effects of a similar nutrient, vitamin D, which the group had previously studied. The researchers thought the two vitamins might use the same mechanism to aid the immune system, but this wasn’t the case. They found that when the vitamins were added to human blood cells infected with tuberculosis, only vitamin A decreased the cells’ cholesterol levels.

The researchers also discovered that the action of vitamin A was dependent on the expression of a gene called NPC2. Further experiments in the lab showed that even if an infected blood cell was stimulated with vitamin A, it would not be able to fight the tuberculosis bacteria if the cell couldn’t express the NPC2 gene.

“We were very surprised that this particular gene was involved, since it has traditionally been associated with cholesterol transport and not immune defense,” said co-first author Elliot Kim, who was a research technician in Liu’s lab at the time of the study and is currently a graduate student in the department of microbiology, immunology and molecular genetics at the Geffen School.

However, once the team took a closer look at the actions taking place in the cells, it made sense.

Cholesterol is stored in lysosomes, compartments in a cell that also play an integral role in fighting infections. If the lysomome is full of cholesterol, it supplies the bacteria with needed nutrition instead of killing it.

Vitamin A induces the cell to express NPC2, which helps the cell effectively remove cholesterol from the lysosomes so the bacteria can’t access it. This allows the lysomomes to once again become effective in killing the bacteria.

When activated correctly, lysomomes fuse with the area of the cell containing the bacteria and dump antimicrobial material onto the bacteria to kill it, similar to a helicopter dropping water and retardant on a forest fire.

“The cells need vitamin A to trigger this defense process and NPC2 to carry it out,” said co-first author Matthew Wheelwright, a medical and doctoral student at the University of Minnesota who was an undergraduate research assistant in Liu’s lab when the research was conducted. “We may be able to target these pathways that regulate cholesterol within a cell to help the immune system respond to infection.”

The next stage of research will focus on better understanding how the immune system takes retinol, the inactive form of vitamin A, and creates all-trans retinoic acid, the form of the nutrient that can activate the infected cells against the tuberculosis bacteria.

The UCLA team notes that this is an early study and that more research needs to be done before recommending vitamin A supplementation to combat tuberculosis or other infections.

Side-Effects Linked To Depression Drugs Found To Be Much Worse

April Flowers for redOrbit.com – Your Universe Online
Thoughts of suicide, sexual difficulties and emotional numbness are all known side-effects of anti-depressants. A new study from the University of Liverpool reveals that these side-effects may be more widespread than previously thought. The findings were published in a recent issue of Psychiatry Research.
The research team, led by psychology Professor John Read of the University’s Institute of Psychology, surveyed 1,829 people who had been prescribed anti-depressants. They found that large numbers of people—over half in some cases—reported psychological problems due to their medication. This has led to increasing concern about the scale of the problem of over-prescription of these drugs.
“While the biological side-effects of antidepressants, such as weight gain and nausea, are well documented, the psychological and interpersonal effects have been largely ignored or denied. They appear to be alarmingly common.”
The participants completed an online questionnaire that asked about twenty possible adverse effects while factoring in people’s level of depression. The survey also asked the participants to report on how they felt while taking the medication. The participants were all located in New Zealand and had been on anti-depressants in the last five years.
Of those in the study between the ages of 18 and 25, over half reported suicidal feelings. In the total sample, 62 percent reported sexual difficulties, 60 percent reported feeling emotionally numb, 52 percent reported feeling not like myself, 42 percent reported reduction in positive feelings, 38 percent reported caring less about others and 55 percent reported withdrawal effects. Eighty-two percent, however, reported that the medications had helped alleviate their depression.
“Effects such as feeling emotionally numb and caring less about other people are of major concern. Our study also found that people are not being told about this when prescribed the drugs.”
“Our finding that over a third of respondents reported suicidality ‘as a result of taking the antidepressants’ suggests that earlier studies may have underestimated the problem.”

Turning 3D Models Into Reality Using Web Browser-Based Software

April Flowers for redOrbit.com – Your Universe Online
In 2005, redevelopment of the London King’s Cross station and the nearby neighborhood was announced and was completed seven years later with a grand opening in 2012. The $667 million project was headed up by internationally recognized engineering firm Arup, famous for their work on the Sydney Opera House and the Allianz Arena in Munich.
Because the renewal included an area north of the station that included 50 new buildings, 2,000 new apartments, 20 new streets and ten new public squares, the greatest challenge became keeping all the project partners up-to-date with consistent data that could be visualized.
“What has already been standardized for product data is not yet common for all 3D data, and therefore takes a lot of effort,” explains Kristian Sons, PhD student at the faculty of Computer Graphics at Saarland University in Saarbruecken. Sons is also a researcher at the German Research Center for Artificial Intelligence (DFKI). To combat this issue, some companies maintain Excel spreadsheets manually, or develop custom 3D visualizations using computer game technologies.
Arup also had to find efficient ways to present the plan and its progress to investors and the general public in a way that was easy to understand. Only experts understand engineering drawings, and artistic impressions lack technical specifications. Public exhibitions are too costly and time consuming to be efficient.
The computer scientists from Saarbruecken worked with colleagues from University College London to create “XML3DRepo.” XML3DRepo combines two research projects—the description language XML3D, and 3DRepo, a version control system for 3D models. These two systems, partially sponsored by Arup, working together make it possible to save 3D objects, change them and administer those changes automatically.
The representation, provided by Son’s XML3D, is presented in a web browser.
“Through XML3D the complete model of King’s Cross can be loaded in a browser and displayed on any web-enabled device,” adds Philipp Slusallek, Professor of Computer Graphics at Saarland University who is also a scientific director at DFKI and the Intel Visual Computing Institute.
This becomes possible by enhancing the recent web standard HTML5 with elements necessary to describe text, images, and video on a website. XML3D also enhances animated and interactive objects.
“Thus, all 3D components are part of the HTML code which defines the website. It can be completed with further notes or planning details by any web developer,” explains Slusallek.
The engineers at Arup see future applications for the XML3DRepo technology, including the ability to simulate passenger flow and arrange the placement of CCTV cameras over the Internet, as well as being able to create realistic visualizations for the public.
The Foresight, Research & Innovation group at Arup writes on its website: “Built Environment Modeling (BEM) offers excellent opportunities to make meaningful stakeholder and public engagement not only possible but also cost effective.”
XML3DRepo will also feature Vertex Modelling, a London based company currently building the most accurate and detailed 3D rendering of London—which stretches across a variety of urban landscapes from the new skyscrapers in the City of London and Tower Bridge to residential houses in the boroughs of Chelsea and Knightsbridge along with a variety of London’s well known and iconic landmarks.
Sons plans to commercialize the software through a spin-off with his research partner Jozef Dobos from University College London.

New Study Confirms Instructional Media Can’t Teach Babies To Read

[ Watch the Video: Can Babies Really Learn To Read? ]

redOrbit Staff & Wire Reports – Your Universe Online

Despite the availability of DVDs and other media products claiming to help babies learn to read, these goods don’t actually instill reading skills in infants, according to new research appearing in the Journal of Educational Psychology.

“While we cannot say with full assurance that infants at this age cannot learn printed words, our results make clear they did not learn printed words from the baby media product that was tested,” senior author Susan Neuman, a professor researchers at New York University’s Steinhardt School of Culture, Education, and Human Development, said Tuesday in a statement.

In order to test whether or not these media products could actually help infants develop reading skills, Neuman and colleagues from Lakehead University, the University of Toronto and the University of Michigan examined 117 babies between the ages of nine and 18 months who were randomly placed in treatment or control groups.

Those babies in the treatment group were given a baby media product such as a DVD, a set of word and picture flashcards or a flip book while the children in the control group did not. The treatment group infants used the products daily over a seven-month span as researchers conducted one home visit, four laboratory visits, and monthly assessments of language development for both the treatment and control groups.

Neuman’s team tested the reading skills in the laboratory by having them recognize the names and sounds of letters, as well as their vocabulary, their ability to identify words on sight, and their reading comprehension levels. A mixture of eye-tracking tasks and standardized measures were used to study outcomes at each developmental stage.

“Using a state-of-the art eye-tracking technology, which follows even the slightest eye movements, the researchers were able to closely monitor how the infants distributed their attention and how they shifted their gaze from one location to another when shown specific words and phrases,” the university explained.

The results of the research, which included criterion and standardized measures of emergent and early reading skills, found no noticeable difference between those babies who had been exposed to the media-based learning tools and the control group on all but one of the 14 assessments conducted.

The lone exception was the parent’s belief that the children were learning new words, despite evidence to the contrary. On exit interviews with the parents, Neuman said that moms and dads had “great confidence” that their children were learning to read and had benefited from the use of such programs. Her team’s findings indicate that their faith in those educational DVDs and other vocabulary development tools is “misplaced.”

New Hurricane Model Can More Accurately Predict Storm Path, Intensity

Brett Smith for redOrbit.com – Your Universe Online

When Hurricane Sandy slammed into southern New Jersey in October 2012, it had essentially confounded both the NOAA’s Global Forecast System (GFS) and the European Centre for Medium-Range Weather Forecasts (ECMWF).

Now, a new real-time hurricane analysis system being developed at Penn State University has been shown to accurately predict the track and intensity of the deadly storm.

“For this particular study aircraft-based Doppler radar information was ingested into the system,” said Fuqing Zhang, a professor of meteorology at Penn State. “Our predictions were comparable to or better than those made by operational global models.”

In addition to incorporating real-time Doppler radar information, the convection-permitting hurricane analysis and forecasting system (WRF-EnKF) also uses high-resolution cloud-permitting grids, which allow for the consideration of individual clouds in modeling a storm system.

“Our model predicted storm paths with 100 km — 50 mile — accuracy four to five days ahead of landfall for Hurricane Sandy,” Zhang said. “We also had accurate predictions of Sandy’s intensity.”

The new model runs 60 storm forecasts simultaneously as a collection, each with differing starting conditions. To evaluate the Hurricane Sandy forecast information, the scientists separated the 60 simulations into three groups: good, fair and poor. This was designed to segregate uncertainties in the model primary conditions. Zhang said that errors occur because of variances in the primary steering-level winds in the tropics that Sandy was baked into, instead of a mid-latitude trough – an area of reasonably low atmospheric pressure – ahead of Sandy’s path.

“Though the mid-latitude system does not strongly influence the final position of Sandy, differences in the timing and location of its interactions with Sandy lead to considerable differences in rainfall forecasts, especially with respect to heavy precipitation over land,” the researchers explain in their report on the model that was published in the Journal of Advances in Modeling Earth Systems.

The study team said Hurricane Sandy is ideal for analysis due to its unusual path for an Atlantic tropical storm, which does not typically roll northwest into the mid-Atlantic or New England. While established models performed reasonably well, the WRF-EnKF model appeared to be very promising in predicting path, intensity and rainfall – the researchers said.

A study published in October found that climate change may eventually keep hurricanes like Sandy from making a sizeable impact on US coastlines.

Strawberries Found To Lower Cholesterol

[ Watch the Video: The Health Benefits Of Strawberries ]

FECYT – Spanish Foundation for Science and Technology

A team of volunteers ate half a kilo of strawberries a day for a month to see whether it altered their blood parameters in any way. At the end of this unusual treatment, their levels of bad cholesterol and triglycerides reduced significantly, according to the analyses conducted by Italian and Spanish scientists.

Several studies had already demonstrated the antioxidant capacity of strawberries, but now researchers from the Università Politecnica delle Marche (UNIVPM, Italy), together with colleagues from the Universities of Salamanca, Granada and Seville (Spain), conducted an analysis that revealed that these fruits also help to reduce cholesterol.

The team set up an experiment in which they added 500 g of strawberries to the daily diets of 23 healthy volunteers over a month. They took blood samples before and after this period to compare data.

The results, which are published in the Journal of Nutritional Biochemistry, show that the total amount of cholesterol, the levels of low-density lipoproteins (LDL or bad cholesterol) and the quantity of triglycerides fell to 8.78%, 13.72% and 20.8% respectively. The high-density lipoprotein (HDL or good cholesterol) remained unchanged.

Eating strawberries also improved other parameters such as the general plasma lipid profile, antioxidant biomarkers (such as vitamin C or oxygen radical absorbance capacity), antihemolytic defenses and platelet function. All parameters returned to their initial values 15 days after abandoning ‘treatment’ with strawberries.

As Maurizio Battino, researcher at UNIVPM and Director of the study, tells SINC: “This is the first time a study has been published that supports the protective role of the bioactive compounds in strawberries in tackling recognized markers and risk factors for cardiovascular diseases.”

The researcher admits that there is still no direct evidence about which compounds of this fruit are behind their beneficial effects, “but all the signs and epidemiological studies point towards anthocyanins, the vegetable pigments that afford them their red color.”

The research team confirmed in other studies that eating strawberries also protects against ultraviolet radiation, reduces the damage that alcohol can have on the gastric mucosa, strengthens erythrocytes, or red blood cells, and improves the antioxidant capacity of the blood.

In fact, this year they will publish another study in the journal Food Chemistry in which they will demonstrate that consuming strawberries increases the antioxidant function of blood flow, erythrocytes and mononuclear cells.

References:

José M. Alvarez-Suarez, Francesca Giampieri, Sara Tulipani, Tiziana Casoli, Giuseppina Di Stefano, Ana M. González-Paramás, Celestino Santos-Buelga, Franco Busco, Josè L. Quiles, Mario D. Cordero, Stefano Bompadre, Bruno Mezzetti, Maurizio Battino. “One-month strawberry-rich anthocyanin supplementation ameliorates cardiovascular risk, oxidative stress markers and platelet activation in humans”. Journal of Nutritional Biochemistry 25 (3): 289-294, marzo de 2014.

Sara Tulipani, Tatiana Armeni, Francesca Giampieri, José M. Alvarez-Suarez, Ana M. Gonzalez-Paramás, Celestino Santos-Buelga, Franco Busco, Giovanni Principato, Stefano Bompadre, José L. Quiles, Bruno Mezzetti, Maurizio Battino. “Strawberry intake increases blood fluid, erythrocyte and mononuclear cell defenses against oxidative challenge”. Food Chemistry 156: 87-93, agosto de 2014

Specialized Cognitive Therapy Improves Blood Sugar Control In Depressed Diabetes Patients

Addressing participants’ moods and their treatment management skills may bring faster relief of depression symptoms

Although maintaining good blood sugar control is crucial for avoiding complications of diabetes, it has been estimated that only about half of patients are successful in meeting target blood glucose levels. The prevalence of depression among diabetes patients – up to twice as high as in the general population – can interfere with patients’ ability to manage their diabetes. Now a group of Massachusetts General Hospital (MGH) investigators report that a program of cognitive behavioral therapy that addresses both mood and diabetes self-care led to improved blood sugar control and produced faster relief of depression in patients with poorly-controlled type 2 diabetes.

“The association between depression and type 2 diabetes is well documented, but clinical trials of either medication or psychological treatment for depression have had mixed or negative effects on adherence to treatment programs,” says Steven Safren, PhD, ABPP, director of Behavioral Medicine in the MGH Department of Psychiatry and lead author of the report in the March issue of Diabetes Care. “In this study we adapted our approach that has improved treatment adherence among HIV/AIDS patients by addressing both depression and treatment self-management skills.”

The current study enrolled 87 adults whose type 2 diabetes was poorly controlled despite treatment with oral medications and who also met criteria for a diagnosis of depression. At the outset of the trial, all participants received an enhanced version of usual diabetes self-care counseling – including meetings with a nurse educator to set goals for blood sugar monitoring, with a dietitian to set dietary and exercise goals, and with a counselor to set strategies for meeting those goals and other medical recommendations.

A subgroup of 45 randomly selected participants took part in 9 to 12 additional weekly cognitive behavioral therapy (CBT) sessions where they worked on problem-solving strategies, reviewed how well they met goals of the previous week and tracked their moods. While the sessions included typical aspects of CBT for depression – such as training in adaptive thinking, relaxation and activity scheduling – they also focused on specific elements of diabetes self-care.

Throughout the year-long study period, participants in both groups continued any previously prescribed depression treatment; but if symptoms were found to have worsened at assessment visits, they were referred for additional therapy or adjustments to antidepressant medication. Participants’ adherence to their prescribed diabetes medication was tracked by an electronic monitoring system that recorded whenever the pill bottle was opened, and their adherence to glucose monitoring, by data downloaded from the monitor.

At the end of the first four months, participants receiving the integrated CBT treatment were significantly more successful than the usual-treatment group in adhering to their prescribed medications and their glucose monitoring schedule. They also showed an improvement in blood sugar control similar to what might be seen with the addition of a weak glucose-lowering medication. These differences in diabetes management and glucose control were also seen at the 8- and 12-month assessments.

While the CBT group had more rapid improvement of their depression symptoms, scoring significantly better on two depression scales at the 4-month assessment, depression symptoms in the usual-treatment group had improved by the 8- and 12-month assessments, removing any statistically significant differences between the groups at the end of the study period. It is possible, Safren notes, that participants in the usual-treatment group were more likely to be referred for additional depression treatment after the 4-month assessment, since they were less likely to show improvement at that visit.

“We are hopeful that this approach can be helpful in treating any medical illness in which patients also have depression,” he says. “We need to study extending this treatment to other conditions, as well as finding the best ways to incorporate it into diabetes care. With today’s emphasis on cost containment in health care, it will be important to know if the improved blood sugar control this treatment appears to confer makes it more cost effective over the long run.” Safren is a professor of Psychology in the Harvard Medical School Department of Psychiatry.

On the Net:

Uninsured Adolescents And Young Adults More Likely To Be Diagnosed With Advanced Cancer

Study shows way forward for age group that has benefited least from cancer progress

A new American Cancer Society study shows that uninsured adolescents and young adults were far more likely to be diagnosed with late-stage cancer, which is more difficult and expensive to treat and more deadly, compared to young patients with health insurance. The study, published early online, will appear in the March issue of the journal CANCER.

The study’s authors says their data suggest a way forward for cancer control efforts in the adolescent and young adult (AYA) population, a group that has benefited the least from recent progress in cancer. “The findings suggest that policies such as the Affordable Care Act that increase the number of people in America with health coverage will result in fewer late-stage cancer diagnoses and save lives.”

For their study, researchers led by Anthony Robbins, M.D., Ph.D., American Cancer Society director of health services research, analyzed data from nearly 260,000 cancer patients ages 15 to 39 in the National Cancer Database.

After adjusting for age, race/ethnicity, facility type, ZIP code-based income and education levels, and U.S. Census region, it was found that uninsured males were 1.51 times more likely to be diagnosed at a distant stage of disease compared with patients with private insurance. Among females, the effect of insurance was even stronger, with uninsured patients found to be 1.86 times more likely to be diagnosed at a distant stage.

Uninsured patients were younger, more likely to be male, more likely to be black or Hispanic, more likely to reside in the South, more likely to be treated in teaching/research facilities, and less likely to be treated in NCI-designated facilities. Uninsured patients were also more likely to reside in ZIP codes with the lowest median income, as well as in ZIP codes with the highest percentage of residents without a high school diploma.

“We believe that this observation holds the promise of improved cancer control efforts in the AYA population, after decades in which AYA patients have experienced far less victory in the War on Cancer than their younger and older counterparts,” conclude the authors. “However, the success of these efforts may be directly tied to the fate of the Medicaid expansion component of the Patient Protection and Affordable Care Act, which, at the time of this writing, remains quite unclear.”

On the Net:

Improving Cancer Diagnosis Rates With New Paper Test Strip

Lee Rannals for redOrbit.com – Your Universe Online

Engineers at the Massachusetts Institute of Technology (MIT) have developed a paper test that could improve cancer diagnosis rates.

Cancer mortality rates can be drastically reduced with early detection, but some of these methods, such as mammography and colonoscopy, are unable to be used in developing nations. Cancer rates in these countries now account for 70 percent of mortality around the world, so a new method to detect the disease earlier is essential.

Researchers developed a paper test that works much like a pregnancy test, helping to reveal whether a person has cancer within minutes. This test could not only improve diagnoses rates, but also could help get people treated earlier.

The new technology uses nanoparticles that interact with tumor proteins known as proteases. These proteins can trigger the release of hundreds of biomarkers that are easily detectable in a person’s urine. The team simply took advantage of these biomarkers by using a highly specialized instrument to do the analysis.

“For the developing world, we thought it would be exciting to adapt it instead to a paper test that could be performed on unprocessed samples in a rural setting, without the need for any specialized equipment,” MIT professor and Howard Hughes Medical Institute investigator Sangeeta Bhatia, said in a statement. “The simple readout could even be transmitted to a remote caregiver by a picture on a mobile phone.”

In order to develop the test strips, the team had to coat nitrocellulose paper with antibodies that are able to capture the peptides. Once these peptides are captured, they flow along the strip and are exposed to several invisible test lines made of other antibodies specific to different tags attached to the peptides. If one of these lines becomes visible, it means the target peptide is present in the sample.

Researchers were able to use the new technology to accurately identify colon tumors in mice. This test represents the first step towards a new type of diagnostic device that could one day be used in humans in developing nations.

“This is a new idea — to create an excreted biomarker instead of relying on what the body gives you,” says Bhatia, senior author of a paper published in the Proceedings of the National Academy of Sciences. “To prove this approach is really going to be a useful diagnostic, the next step is to test it in patient populations.”

She said the device will first be applied to high-risk populations, such as people who have had cancer previously, but eventually it would be used for early detection. Developed nations may also be able to use the device as a simple and inexpensive way to diagnose cancer.

“I think it would be great to bring it back to this setting, where point-of-care, image-free cancer detection, whether it’s in your home or in a pharmacy clinic, could really be transformative,” Bhatia said in a statement.

SpaceX Falcon 9 Rocket Gets Landing Legs For Upcoming Mission

Lee Rannals for redOrbit.com – Your Universe Online

SpaceX is making an adjustment to its Falcon 9 rocket in hopes of one day being able to reuse it for future missions.

SpaceX founder Elon Musk tweeted a picture on Sunday of the company mounting landing legs to its Falcon 9 rocket in preparation for a mission in March.

The rocket uses nine Merlin engines and aluminum-lithium alloy tanks containing liquid oxygen and rocket-grade kerosene propellant to launch its prized Dragon capsule towards the International Space Station. SpaceX says Falcon 9 produces a thrust greater than five 747s at full power, which actually increases with altitude. The rocket generates 1.3 million pounds of thrust at sea level, but later exudes 1.5 million pounds in the vacuum of space.

When the Falcon 9 finishes taking the Dragon capsule to orbit, it falls back to Earth for a crash landing in the Pacific Ocean, where it is ultimately destroyed. Previously, the company attempted to restart the engine in order to slow this landing and salvage the rocket. However, since this method was proven unfruitful, SpaceX is now hoping the added legs might soften the hard oceanic landing.

SpaceX said the four legs are made of state-of-the-art carbon fiber with aluminum honeycomb. The legs are being installed symmetrically around the base of the rocket, and are stowed along the side of the vehicle during liftoff and later extend outward and down for landing.

If all goes well, the landing legs could eventually guide the Falcon 9 back down towards Earth in order to preserve the expensive piece of equipment for future missions.

“However, F9 will continue to land in the ocean until we prove precision control from hypersonic thru subsonic regimes,” Musk wrote on its Twitter account.

SpaceX spokeswoman Emily Shanklin told Reuters that the odds of success at a soft landing for the rocket are less than 40 percent.

“Given all the things that would have to go right, the probability of recovering the first stage is low,” she noted. “It probably won’t work, but we are getting closer.”

SpaceX will be testing the new legs on March 16 when it sends the Dragon on its third of 12 resupply missions to the orbiting space station. The company has a $1.6 billion contract to bring up supplies to its astronauts aboard the orbiting laboratory.

Exoplanet Orbiting Tau Bootis Star Could Have Watery Atmosphere

[ Watch the Video: Watery Evidence Found In Tau Bootis System ]

Lee Rannals for redOrbit.com – Your Universe Online

Astronomers, publishing a paper in The Astrophysical Journal Letters, say they may have discovered water on an exoplanet outside our solar system.

The team of scientists say they believe they have detected water in the atmosphere of a planet orbiting the nearby star tau Boötis.

“Planets like tau Boötis b, which are as massive as Jupiter but much hotter, do not exist in our solar system. Our detection of water in the atmosphere of tau Boötis b is important because it helps us understand how these exotic hot-Jupiter planets form and evolve,” Chad Bender, a research associate in the Penn State Department of Astronomy and Astrophysics and a co-author of the paper, said in a statement. “It also demonstrates the effectiveness of our new technique, which detects the infrared radiation in the atmospheres of these planets.”

Previously, scientists detected water vapor by using a technique that only works if a planet transits in front of its star when viewed from Earth. However, the team applied a new infrared technique to help make the latest discovery.

“These planets are much closer to us than the nearest transiting planets, but largely have been ignored by astronomers because directly measuring their atmospheres with previously existing techniques was difficult or impossible,” Bender said.

The team used high-resolution L-band spectroscopy to measure the radial velocity variations of the hot Jupiter in the tau Boötis planetary system.

“Treating the tau Boo system as a high flux ratio double-lined spectroscopic binary permits the direct measurement of the planet’s true mass as well as its atmospheric properties,” the astronomers wrote in the journal. “After removing telluric absorption and cross-correlating with a model planetary spectrum dominated by water opacity, we measure a 6-sigma detection of the planet.”

“This radial velocity leads to a planetary orbital inclination of i = 45+3-4degrees and a mass of M_P = 5.90+0.35-0.20 M_ Jup. We report the first detection of water vapor in the atmosphere of a non-transiting hot Jupiter, tau Boo b,” the team said.

The astronomers believe that this new technique used with more-powerful future telescopes could help examine the atmospheres of planets that are much cooler and more distant from their host stars. NASA’s upcoming James Webb Telescope is one of the future instruments that could help astronomers unveil these secrets within exoplanets in the future.

Dieters More Likely To Give In To Alcoholic Temptations Than To Sugary Snacks

Joan Robinson, Corporate Communications Manager, Springer-Verlag
There’s more to dieting than just sheer willpower and self-control. The presence of friends, late night cravings or the temptation of alcohol can often simply be too strong to resist. Research led by Heather McKee of the University of Birmingham in the UK monitored the social and environmental factors that make people, who are following weight management programs, cheat.
The study is published in the Springer journal Annals of Behavioral Medicine.
Eighty people who were either part of a weight-loss group or were dieting on their own participated in the one-week study. They were given mobile phones on which they kept an electronic diary of all the temptations that came their way, and the situations during which they gave in to these temptations. This helped the researchers to make a complete real-time record, known as ‘ecological momentary assessment,’ of participants’ dietary temptations and lapses.
Participants lapsed just over 50 percent of the time when tempted, and were especially vulnerable at night. They were more likely to give in to alcoholic temptations than to eat a sugary snack or to overindulge. Their willpower was also influenced by the presence of others, regardless of whether a dietary temptation was unexpected or whether the dieter went looking for something to eat. The stronger the dietary temptation, the more likely a participant was to lapse. Not surprisingly, most participants reported that they were more aware of their eating behavior while keeping their diet diaries.
The findings could be valuable for dietary relapse and weight maintenance programs. They highlight the possible future use of mobile phone applications to support people who are dieting. Following a lapse in such programs, the findings also stress the importance of including specific coping mechanisms and reinforcing a person’s self-efficacy, in other words, bolstering their belief in their own ability to reach their goals.
“The findings help piece together the complex jigsaw surrounding the daily predictors of dietary temptations and help us to better understand how dietary temptations and lapses operate,” says McKee. “In the fight against obesity, we need to help people become more aware of the various personal, situational, and environmental factors that expose them to dietary temptations. In doing this, we can help them to develop the necessary skills to cope successfully with dietary temptations and prevent lapses.”

MERS Coronavirus Prevalent In Camels For At Least 20 Years

Lawrence LeBlond for redOrbit.com – Your Universe Online

Middle East Respiratory Syndrome-Coronavirus (MERS-CoV) has infected 182 people since it was first reported in September 2012. The disease, which has also resulted in 79 deaths over that time, has now been confirmed to be prevalent in dromedary camels throughout Saudi Arabia and has been for the past two decades, if not longer, according to an international study.

For the study, published in the American Society of Microbiology’s open-access journal mBio on February 25, researchers from the United States and Saudi Arabia conducted a widespread survey of dromedary camels, sheep and goats throughout Saudi Arabia, collecting blood samples and rectal and nasal swabs in November and December 2013. The team used mobile lab equipment to test the blood samples for antibodies reactive with MERS-CoV, and to test the swabs for active virus. The team also analyzed archived blood samples of dromedary camels taken from 1992 to 2010.

After the analysis was complete, the team found that 74 percent of the camels sampled had antibodies to MERS-CoV. Also, more than 80 percent of adult camels had antibodies to the virus. For camels two years and younger, the team found that 90 percent of samples from the east tested positive for the antibodies, while only five percent from the southwest were positive. And the antibodies were seen in camel samples dating all the way back to 1992, which offers strong evidence that either MERS-CoV or a closely related virus has been circulating in the animals for at least 20 years.

The research team also found that active virus was frequently detected in nasal swabs in 35 percent of young camels and 15 percent of adult camels across the country. The virus was less frequently detected in rectal swabs and not at all in the blood samples, indicating that the virus was most likely being spread via respiratory secretions.

“Our study shows the MERS coronavirus (MERS-CoV) is widespread,” senior study author W. Ian Lipkin, of Columbia University, New York, said in a statement. “Adult camels were more likely to have antibodies to the virus while juveniles were more likely to have active virus. This indicates that infection in camels typically occurs in early life, and that if people get the virus from camels the most likely source is young camels.”

While the evidence offers a pretty strong connection to the virus identified in humans, it remains unknown if camels or some other animal, such as bats, are the source of the human susceptibility. The spread of MERS-CoV in humans was of great concern through much of 2013, with some level of fear that an epidemic may have been in the making during the Hajj pilgrimage last fall. However, since the New Year arrived, there have only been six laboratory-confirmed cases of MERS-CoV in humans and has shown no sign of sustained human-to-human transmission.

While some intense efforts were made to identify bats as the source of infection in humans – a bat from Saudi Arabia was identified as having a 100-percent genetic match to the MERS-CoV found in humans – the first known case of MERS-CoV was in a Saudi Arabian man who had four pet camels.

Lipkin, who was also lead author of the team that found the genetic match in the bat study, said at the time: “There have been several reports of finding MERS-like viruses in animals. None were a genetic match. In this case we have a virus in an animal that is identical in sequence to the virus found in the first human case. Importantly, it’s coming from the vicinity of that first case.”

While the researchers speculate that camels are potential reservoirs for human transmission, this study does not prove that.

“Our findings suggest that continuous, longer-term surveillance will be necessary to determine the dynamics of virus circulation in dromedary camel populations,” the authors wrote.

Along with Lipkin, co-lead authors of the paper include Abdulaziz Alagaili of King Saud University, the Saudi Wildlife Authority in Riyadh and Thomas Briese of Columbia University.

How Social Understanding Is Performed By The Brain

Mathilde Weirsøe, Aarhus University

In a study to be published in Psychological Science, researchers from Aarhus University and the University of Copenhagen demonstrate that brain cells in what is called the mirror system help people make sense of the actions they see other people perform in everyday life.

Using magnetic stimulation to temporarily disrupt normal processing of the areas of the human brain involved in the production of actions of human participants, it is demonstrated that these areas are also involved in the understanding of actions. The study is the first to demonstrate a clear causal effect, whereas earlier studies primarily have looked at correlations, which are difficult to interpret.

One of the researchers, John Michael, explains the process:

“There has been a great deal of hype about the mirror system, and now we have performed an experiment that finally provides clear and straightforward evidence that the mirror system serves to help people make sense of others’ actions,” says John Michael.

Understanding autism and schizophrenia

The study shows that there are areas of the brain that are involved in the production of actions. And the researchers found evidence that these areas contribute to understanding others’ actions. This means that the same areas are involved in producing actions and understanding others’ actions. This helps us in everyday life, but it also holds great potential when trying to understand why people with autism and schizophrenia have difficulties with social interaction.

“Attaining knowledge of the processes underlying social understanding in people in general is an important part of the process of attaining knowledge of the underlying causes of the difficulties that some people diagnosed with autism and schizophrenia experience in sustaining social understanding. But it is important to emphasize that this is just one piece of the puzzle.”

“The findings may be interesting to therapists and psychiatrists who work with patients with schizophrenia or autism, or even to educational researchers,” adds John Michael.

Facts about the empirical basis

The participants (20 adults) came to the lab three times. They were given brain scans on the first visit. On the second and third, they received stimulation to their motor system and then performed a typical psychological task in which they watched brief videos of actors pantomiming actions (about 250 videos each time). After each video they had to choose a picture of an object that matched the pantomimed video. For example, a hammer was the correct answer for the video of an actor pretending to hammer.

This task was intended to gauge their understanding of the observed actions. The researchers found that the stimulation interfered with their performance of this task.

Innovative method

The researchers used an innovative technique for magnetically stimulating highly specific brain areas in order to temporarily disrupt normal processing in those areas. The reason for using this technique (called continuous theta-burst stimulation) in general is that it makes it possible to determine which brain areas perform which functions. For example, if you stimulate (and thus temporarily impair) area A, and the participants subsequently have difficulty with some specific task (task T), then you can infer that area A usually performs task T. The effect goes away after 20 minutes, so this is a harmless and widely applicable way to identify which tasks are performed by which areas.

With continuous theta-burst stimulation, you can actually determine that the activation of A contributes as a cause to people performing T. This method thus promises to be of great use to neuroscientists in the coming years.

John Michael works for the transdisciplinary Interacting Minds Centre at Aarhus University. In his work, he combines conceptual and experimental approaches to social interaction and social cognition.

High Carb Diets Can Be Bad For Your Brain Health

[ Watch the Video: What’s Making Your Brain Shrink? ]
Mary Ann Liebert, Inc., publishers
New Rochelle, NY, February 21, 2014—Even small increases in blood sugar caused by a diet high in carbohydrates can be detrimental to brain health. Recent reports in medical literature link carbohydrate calorie-rich diets to a greater risk for brain shrinkage, dementia and Alzheimer’s disease, impaired cognition, and other disorders. David Perlmutter, MD, best-selling author of Grain Brain, explores this important topic in a provocative interview in Alternative and Complementary Therapies from Mary Ann Liebert, Inc., publishers. .
Dr. Perlmutter, a board-certified neurologist and fellow of the American College of Nutrition, has just been appointed Editor-in-Chief of a new peer-reviewed journal, Brain and Gut, that will debut in summer 2014.  The journal will publish leading-edge research dedicated to exploring a whole systems approach to health and disease from the intimate relationship between the brain and the digestive systems.
In the interview “Rethinking Dietary Approaches for Brain Health,” Dr. Perlmutter says, “We live with this notion that a calorie is a calorie, but at least in terms of brain health, and I believe for the rest of the body as well, there are very big differences between our sources of calories in terms of the impact on our health. Carbohydrate calories, which elevate blood glucose, are dramatically more detrimental to human physiology, and specifically to human health, than are calories derived from healthful sources of fat.”
Dr. Perlmutter will explore how brain health and cognitive function are linked to nutrition in his presentation, “The Care and Feeding of Your Brain,” to be delivered at the 2014 Integrative Healthcare Symposium taking place now in New York City.
About the Journal
Alternative and Complementary Therapies is a bimonthly journal that publishes original articles, reviews, and commentaries evaluating alternative therapies and how they can be integrated into clinical practice. Topics include botanical medicine, vitamins and supplements, nutrition and diet, mind-body medicine, acupuncture and traditional Chinese medicine, Ayurveda, indigenous medicine systems, homeopathy, naturopathy, yoga and meditation, manual therapies, energy medicine, and spirituality and health. Tables of content and a sample issue may be viewed on the Alternative and Complementary Therapies website.
About the Publisher
Mary Ann Liebert, Inc., publishers is a privately held, fully integrated media company known for establishing authoritative peer-reviewed journals in many promising areas of science and biomedical research, including The Journal of Alternative and Complementary Medicine, Medical Acupuncture, and Journal of Medicinal Food. Its biotechnology trade magazine, Genetic Engineering & Biotechnology News (GEN), was the first in its field and is today the industry’s most widely read publication worldwide. A complete list of the firm’s 80 journals, books, and news magazines is available on the Mary Ann Liebert, Inc., publishers website.

Drinking Age Laws Save Lives, Study Confirms

Journal of Studies on Alcohol and Drugs
PISCATAWAY, NJ – Although some advocates want to lower the legal drinking age from 21, research continues to show that the law saves lives. That’s the finding of a new review published in a special supplemental issue to the Journal of Studies on Alcohol and Drugs.
Researchers found that studies done since 2006—when a new debate over age-21 laws flared up—have continued to demonstrate that the mandates work. The laws, studies show, are associated with lower rates of drunk-driving crashes among young people. And it seems they also curb other hazards of heavy drinking—including suicide, dating violence and unprotected sex.
“The evidence is clear that there would be consequences if we lowered the legal drinking age,” said lead researcher William DeJong, Ph.D., of Boston University School of Public Health.
The U.S. legal-drinking age has had a winding history. In the early 1970s, 29 states lowered their legal drinking age to 18, 19 or 20. But after a rise in drunk-driving crashes among young people, many states began to reverse course. A change in federal law eventually pushed all states to adopt a minimum drinking age of 21 by 1988.
But in recent years, the benefits of the age-21 law have been challenged.
In 2006, a non-profit called Choose Responsibility started campaigning for a change in the federal law. Two years later, a group of more than 100 U.S. university presidents and chancellors known as the Amethyst Initiative called for a re-evaluation of the legal drinking age—citing a “clandestine” culture of heavy drinking episodes among college students as one reason that the age-21 law is not working.
Those moves grabbed a lot of media attention, and public health experts responded by launching new studies into the impact of the drinking-age law. Based on DeJong’s review, that research supports what earlier work had shown: Since the legal drinking age was set at 21, young people have been drinking less and are less likely to get into drunk-driving crashes.
In one study, researchers found that, in 2011, 36 percent of college students said in the past two weeks they’d engaged in heavy episodic drinking (five or more drinks in a sitting, sometimes called “binge” drinking). That compared with 43 percent of students in 1988, the first year that all U.S. states had an age-21 law. There was an even bigger decline among high school seniors—from 35 percent to 22 percent.
Of course, many young people break the law and drink anyway. But, DeJong said, the evidence shows that the law is working despite that. That may be, in part, because minors do not want to be caught drinking, and therefore take fewer risks—like getting behind the wheel.
Plus, DeJong said, “there are many young people who do wait until they’re 21 to drink.”
DeJong said that education can help discourage underage drinking. Often, youths buy into the myth, for instance, that all college students engage in heavy drinking episodes. So giving them a more realistic picture of the true “drinking norms” can be effective, DeJong explained.
And, he said, tougher enforcement of the age-21 law, rather than a repeal, is what’s needed. “Just because a law is commonly disobeyed doesn’t mean we should eliminate it,” DeJong noted. Clinical trials have found that when college towns put more effort into enforcing the law—and advertise that fact to students—student drinking declines.
“Some people assume that students are so hell-bent on drinking, nothing can stop them,” DeJong said. “But it really is the case that enforcement works.”
DeJong, W., & Blanchette, J. (March 2014). Case closed: Research evidence on the positive public health impact of the age 21 minimum legal drinking age in the United States. Journal of Studies on Alcohol and Drugs, Supplement No. 17, 108-115.

Scientists Transform Skin Cells Into Functioning Liver Cells

Gladstone Institutes

Joint Gladstone-UCSF study highlights novel reprogramming method; offers new hope for treating liver failure

SAN FRANCISCO, CA—February 23, 2014 — The power of regenerative medicine now allows scientists to transform skin cells into cells that closely resemble heart cells, pancreas cells and even neurons. However, a method to generate cells that are fully mature—a crucial prerequisite for life-saving therapies—has proven far more difficult. But now, scientists at the Gladstone Institutes and the University of California, San Francisco (UCSF), have made an important breakthrough: they have discovered a way to transform skin cells into mature, fully functioning liver cells that flourish on their own, even after being transplanted into laboratory animals modified to mimic liver failure.

In previous studies on liver-cell reprogramming, scientists had difficulty getting stem cell-derived liver cells to survive once being transplanted into existing liver tissue. But the Gladstone-UCSF team figured out a way to solve this problem. Writing in the latest issue of the journal Nature, researchers in the laboratories of Gladstone Senior Investigator Sheng Ding, PhD, and UCSF Associate Professor Holger Willenbring, MD, PhD, reveal a new cellular reprogramming method that transforms human skin cells into liver cells that are virtually indistinguishable from the cells that make up native liver tissue.

These results offer new hope for the millions of people suffering from, or at risk of developing, liver failure—an increasingly common condition that results in progressive and irreversible loss of liver function. At present, the only option is a costly liver transplant. So, scientists have long looked to stem cell technology as a potential alternative. But thus far they have come up largely empty-handed.

“Earlier studies tried to reprogram skin cells back into a pluripotent, stem cell-like state in order to then grow liver cells,” explained Dr. Ding, one of the paper’s senior authors, who is also a professor of pharmaceutical chemistry at UCSF, with which Gladstone is affiliated. “However, generating these so-called induced pluripotent stem cells, or iPS cells, and then transforming them into liver cells wasn’t always resulting in complete transformation. So we thought that, rather than taking these skin cells all the way back to a pluripotent, stem cell-like state, perhaps we could take them to an intermediate phase.”

This research, which was performed jointly at the Roddenberry Center for Stem Cell Research at Gladstone and the Broad Center of Regeneration Medicine and Stem Cell Research at UCSF, involved using a ‘cocktail’ of reprogramming genes and chemical compounds to transform human skin cells into cells that resembled the endoderm. Endoderm cells are cells that eventually mature into many of the body’s major organs—including the liver.

“Instead of taking the skin cells back to the beginning, we took them only part way, creating endoderm-like cells,” added Gladstone and CIRM Postdoctoral Scholar Saiyong Zhu, PhD, one of the paper’s lead authors. “This step allowed us to generate a large reservoir of cells that could more readily be coaxed into becoming liver cells.”

Next, the researchers discovered a set of genes and compounds that can transform these cells into functioning liver cells. And after just a few weeks, the team began to notice a transformation.

“The cells began to take on the shape of liver cells, and even started to perform regular liver-cell functions,” said UCSF Postdoctoral Scholar Milad Rezvani, MD, the paper’s other lead author. “They weren’t fully mature cells yet—but they were on their way.”

Now that the team was encouraged by these initial results in a dish, they wanted to see what would happen in an actual liver. So, they transplanted these early-stage liver cells into the livers of mice. Over a period of nine months, the team monitored cell function and growth by measuring levels of liver-specific proteins and genes.

Two months post-transplantation, the team noticed a boost in human liver protein levels in the mice, an indication that the transplanted cells were becoming mature, functional liver cells. Nine months later, cell growth had shown no signs of slowing down. These results indicate that the researchers have found the factors required to successfully regenerate liver tissue.

“Many questions remain, but the fact that these cells can fully mature and grow for months post-transplantation is extremely promising,” added Dr. Willenbring, associate director of the UCSF Liver Center and the paper’s other senior author. “In the future, our technique could serve as an alternative for liver-failure patients who don’t require full-organ replacement, or who don’t have access to a transplant due to limited donor organ availability.”

Other scientists who participated in this research include UCSF researchers Jack Harbell, MD, also a lead author on the paper, as well as Aras Mattis, MD, PhD, Alan Wolfe and Leslie Benet, PhD. Funding was provided by the following: the California Institute for Regenerative Medicine, the National Institutes of Health, the German Academic Exchange Service, and the Society of University Surgeons.

The Newest Exoplanet Hunter – PLATO

The European Space Agency is planning a mission called Planetary Transits And Oscillations of Stars, or PLATO, to look for “extrasolar planets.” These are planets around stars other than our own Sun. PLATO will gather three years’ worth of observational data using an array of 34 separate 12-centimeter telescopes and cameras to investigate a million stars spread out over half the sky. This configuration makes PLATO a completely new type of space telescope and will allow it to discover planets smaller than Earth and also planets at distances from their host stars similar to the Earth-Sun distance. One scientist involved with the mission said, “Plato will begin a completely new chapter in the exploration of extrasolar planets…We will find planets that orbit their star in life-sustaining ‘habitable’ zones: planets where liquid water is expected, and where life as we know it can be maintained.”

[ Read the Article: ESA Selects PLATO Mission To Join The Hunt For Extrasolar Planets ]

Large Hadron Collider Predecessor May Be Four Times Larger, Much More Powerful

Lee Rannals for redOrbit.com – Your Universe Online

Scientists gathered in Geneva, Switzerland last week to consider the possibility of building a particle accelerator four times the size of the current largest accelerator in the world.

The scientists met not far from CERN, which hosts the largest particle accelerator known as the Large Hadron Collider (LHC). This accelerator has been made famous by its controversial discovery of the Higgs boson (God particle) a few years ago.

While LHC is still undergoing construction to make it even more powerful, scientists met up around CERN to discuss the potential of building an even more powerful machine. The reasoning for starting a new project when the other isn’t quite complete is because accelerators take a long time to build, according to CERN director general Dr. Rolf Heuer.

“We have very long lead times, because our projects are ambitious, and they need a lot of research and development,” Heuer told BBC‘s Roland Pease. “Take as an example the LHC. It is just three years into full swing, but the real discussion on the LHC started in 1983; the first meeting on the physics started in 1984. And the first data were taken in 2009. So we need a long lead time. And that’s why we start now to kick off this project.”

The proposal being visualized is for a 60-mile tunnel that would encircle Geneva, reaching out to the Alps in the east, the Jura Mountains in the west and could even go under Lake Geneva. The tunnel is just one of several proposals to be considered by the group. According to BBC, Japan and China are also wanting to host the giant collider.

Scientists are debating both the location and size of the collider, as well as what particles they want to smash. Some hope to use it to collide protons to help look at the extreme conditions during the Big Bang. However, other experts prefer electrons, which can be steered more easily and give far cleaner physics. Either way, the work that LHC has helped scientists do over the last few years is just the beginning.

“It took nearly 50 years to complete the so-called Standard Model, which just describes barely 5 percent of the Universe – the visible Universe. Fifty years for 5 percent! We still need to explore 95 percent, and this is what I would call the dark Universe,” Heuer told BBC.

“We very much hope that with the LHC running at higher energy next year, we might get the first glimpse of what dark matter is, for example. And building on that I would assume that we then can build a physics case for a future circular collider,” he concluded.

Skin Tumor Vaccine Shows Promise In Wild Mice

PLOS

Papillomaviruses (linked to cervical cancer when they infect the mucosal tissue in the female reproductive tract) can also infect normal skin, where they cause warts and possibly non-melanoma skin cancer, mostly in immune-suppressed organ transplant patients. An article published on February 20th in PLOS Pathogens suggests that vaccination might prevent virus-associated benign and malignant skin tumors.

Transplant recipients need to take immunosuppressive drugs for the rest of their lives to prevent rejection of the transplanted organ. Among the side effects of these drugs, widespread abnormal skin growths have large impact on the patients’ quality of life. These can also progress to skin cancer, for which transplant patients have a 250-fold elevated risk. Sabrina Vinzón and Frank Rösl, from the German Cancer Research Center in Heidelberg, and colleagues sought to test whether papillomavirus vaccination around the time of transplantation could prevent the skin lesions seen in patients.

They used a rodent species (the multimammate mouse) as a unique pre-clinical model in which skin papillomaviruses are present and usually transmitted to young offspring. This mimics the situation in humans–most of us are infected with skin papillomaviruses as children and carry the virus in skin cells for the rest of our lives. However, these animals are more sensitive to the virus than humans with an intact immune system: most of them spontaneously develop benign skin tumors as well as malignant ones.

The scientists made a vaccine against the rodent skin papillomavirus that was modeled on the highly efficient and widely approved HPV vaccine against human papillomaviruses that protects against cervical cancer and genital warts. When they tested that vaccine in their animals, they found that vaccination completely prevented the appearance of benign and malignant skin tumors.

Vaccination does not eliminate the virus, but virus numbers in skin cells are much lower in the vaccinated animals, so the vaccine succeeds in educating and boosting the immune system in a way that it can keep the virus in check. Importantly, it can do so even in mice treated with immune-suppressive drugs.

Given that the vaccine works even when given to already infected animals, and continues to suppress the virus even when they are treated with immune-suppressive drugs–conditions that are similar to immunosuppressed patients who were infected with papillomaviruses as children–the scientists conclude that “these findings provide the basis for the clinical development of potent vaccination strategies against cutaneous [skin] HPV infections and HPV-induced tumors, especially in patients awaiting organ transplantation.”

Fruit Fly Study Strengthens Connection Among Protein Misfolding, Sleep Loss, And Age

University of Pennsylvania School of Medicine

Pulling an “all-nighter” before a big test is practically a rite of passage in college. Usually, it’s no problem: You stay up all night, take the test, and then crash, rapidly catching up on lost sleep. But as we age, sleep patterns change, and our ability to recoup lost sleep diminishes.

Researchers at the Perelman School of Medicine, University of Pennsylvania, have been studying the molecular mechanisms underpinning sleep. Now they report that the pathways of aging and sleep intersect at the circuitry of a cellular stress response pathway, and that by tinkering with those connections, it may be possible to alter sleep patterns in the aged for the better – at least in fruit flies.

Nirinjini Naidoo, PhD, associate professor in the Center for Sleep and Circadian Neurobiology and the Division of Sleep Medicine, led the study with postdoctoral fellow Marishka Brown, PhD, which was published online before print in the journal Neurobiology of Aging.

Increasing age is well known to disrupt sleep patterns in all sorts of ways. Elderly people sleep at night less than their younger counterparts and also sleep less well. Older individuals also tend to nap more during the day. Naidoo’s lab previously reported that aging is associated with increasing levels of protein unfolding, a hallmark of cellular stress called the “unfolded protein response.”

Protein misfolding is also a characteristic of several age-related neurodegenerative diseases, such as Alzheimer’s and Parkinson’s diseases, and as it turns out, also associated with sleep deprivation. Naidoo and her team wanted to know if rescuing proper protein folding behavior might counter some of the detrimental sleep patterns in elderly individuals.

Using a video monitoring system to compare the sleep habits of “young” (9 days old) and “aged” (8 weeks old) fruit flies, they found that aged flies took longer to recover from sleep deprivation, slept less overall, and had their sleep more frequently interrupted compared to younger control animals. However, adding a molecule that promotes proper protein folding – a molecular “chaperone” called PBA — mitigated many of those effects, effectively giving the flies a more youthful sleep pattern. PBA (sodium 4-phenylbutyrate) is a compound currently used to treat such protein-misfolding-based diseases as Parkinson’s and cystic fibrosis.

The team also asked the converse question: Can protein misfolding induce altered sleep patterns in young animals. Another drug, tunicamycin, induces protein misfolding and stress, and when the team fed it to young flies, their sleep patterns shifted towards those of aged flies, with less sleep overall, more interrupted sleep at night, and longer recovery from sleep deprivation.

Molecular analysis of sleep-deprived and PBA-treated flies suggested that PBA acts through the unfolded protein response. PBA, Naidoo says, had two effects on aged flies: it “consolidated” baseline sleep, increasing the total amount of time slept and shifted recovery sleep, after sleep deprivation, to look more like that of a young fly.

“It rescued the sleep patterns in the older flies,” she explains.

These results, Naidoo says, suggest three key messages. First, sleep loss leads to protein misfolding and cellular stress, and as we age, our ability to recover from that stress decreases. Second, aging and sleep apparently form a kind of negative “chicken-and-egg” feedback loop, in which sleep loss or sleep fragmentation lead to cellular stress, followed by neuronal dysfunction, and finally even poorer-quality sleep.

Sleep recharges neuronal batteries, Naidoo explains, and if a person is forced to stay awake, those batteries run down. Dwindling physiological resources must be devoted to the most critical cell functions, which do not necessarily include protein homeostasis. “Staying awake has a cost, and one of those costs is problems with protein folding.”

Finally, and most importantly, she says these results suggest — assuming they can be replicated in mice and humans – that it may be possible using drugs such as PBA to “fix sleep” in aged or mutant animals.

“People know that sleep deteriorates with aging,” Naidoo says, “But this might be able to be stopped or reversed with molecular chaperones.” Her team is now looking to determine if a similar situation exists in mammals and if better sleep translates into longer lifespan.

Closing ‘Free Will’ Loophole From Bell’s Theorem

Lee Rannals for redOrbit.com – Your Universe Online

MIT researchers writing in the journal Physical Review Letters are proposing an experiment that could test Bell’s theorem.

According to the scientists, the experiment could test the 50-year-old theorem to determine whether our universe is based on textbook laws of classical physics or less-tangible probabilities of quantum physics.

Physicist John Bell wrote in 1964 that if the universe is based on classical physics, the measurement of one entangled particle should not affect the measurement of the other, which is a theory known as locality. The physicist created a mathematical formula for locality, and showed scenarios that violated this formula, showing predictions of quantum mechanics.

Scientists have been testing Bell’s theorem by measuring the properties of entangled quantum particles in the laboratory. These experiments have shown that these particles are correlated more strongly than would be expected under the laws of classical physics.

Physicists have also identified several loopholes in Bell’s theorem, suggesting that while the outcomes of these experiments support quantum mechanics, they may reflect unknown “hidden variables” that give the illusion of a quantum mechanics, but are really explained better in classical physics terms.

Two major loopholes have been closed, but a third has remained that physicists refer to as “setting independence” or “free will.” This loophole proposes that a particle detector’s settings may “conspire” events in shared casual past of the detectors, which implies that a physicist running the experiment does not have complete free will in choosing each detector’s settings.

The MIT team is proposing an experiment to close this third loophole by determining a particle detector’s settings using distant quasars that formed billions of years ago. Essentially, if two quasars on opposite sides of the sky are sufficiently distant from each other, they would have been out of causal contact since the Big Bang fourteen billion years ago.

During the experiment, a detector would measure the property of a particle, while another detector does the same for the other particle. Just after the particles are generated, scientists would use telescopic observations of distant quasars to determine which properties each detector will measure of a respective particle. The first quasar would determine the settings to detect the first particle, the second quasar would determine the same of the second particle.

“I think it’s fair to say this [loophole] is the final frontier, logically speaking, that stands between this enormously impressive accumulated experimental evidence and the interpretation of that evidence saying the world is governed by quantum mechanics,” MIT’s David Kaiser, the Germeshausen Professor of the History of Science and senior lecturer in the Department of Physics, told MIT’s Jennifer Chu.

Physicist Michael Hall, who was not a part of the study, said that the team’s proposal is the first detailed analysis of how an experiment could be carried out in practice, using current technology.

“It is therefore a big step to closing the loophole once and for all,” said Hall, a research fellow in the Centre for Quantum Dynamics at Griffith University in Australia. “I am sure there will be strong interest in conducting such an experiment, which combines cosmic distances with microscopic quantum effects — and most likely involving an unusual collaboration between quantum physicists and astronomers.”

The MIT team hopes that since they have put forth an experimental approach, other scientists will actually perform the experiment by using observations of distant quasars.

Younger People, Men And Those Without Children More Likely To Drop Out Of HIV Care In South Africa

Analysis carried out by an academic at Royal Holloway, University of London has revealed that younger people, men and those without children are more likely to stop attending clinics for HIV treatment in South Africa.

Dr Michael Evangeli, from the Department of Psychology at Royal Holloway, worked alongside colleagues at the University of Southampton and the University of KwaZulu Natal, South Africa. The academics used data collected in a study, which is published in the journal PLOS ONE, that followed the progress of 380 HIV positive people eligible for HIV treatment in a rural part of South Africa over a four year period and looked at what was associated with whether they dropped out of care.

Dr Evangeli, lead author of the study, said: “There is a pressing need to engage young people, and men, in long-term care. Medication for HIV is only given to those who are most unwell and they need to attend clinics regularly. Failing to attend is a problem for both the health of these individuals and for the health of others whom they may put at risk of HIV infection.”

South Africa has the largest HIV positive population in the world – around six million people. One in five adults in South Africa are HIV positive.

“We need to improve our understanding of retention in care in future studies. Ultimately strategies must be put in place to help people remain in care and get the treatment they so desperately need to help slow down the spread of HIV and save as many lives as possible,” added Dr Evangeli.

On the Net:

New Laser Speeds Up Internet By ‘Orders Of Magnitude’

redOrbit Staff & Wire Reports – Your Universe Online

Caltech researchers have developed a new laser that could send data over the Internet backbone up to 20 times faster.

The breakthrough culminates five years of work by researchers working under Amnon Yariv, professor of applied physics and electrical engineering at Caltech. The current study was led by postdoctoral scholar Christos Santis and graduate student Scott Steger.

While laser light is capable of carrying vast amounts of information, it needs to be as spectrally pure, or as close to a single frequency, as possible. The greater the spectral purity, or coherence, the more information the light can carry.

Researchers have worked for decades to develop a laser that comes as close as possible to emitting a single frequency, but today’s global optical-fiber networks are still powered by a laser known as the distributed-feedback semiconductor (S-DFB) laser, which was developed in the mid 1970s in Yariv’s research group.

That laser’s unusual longevity stemmed from what, at the time, was considered unparalleled spectral purity. The laser’s increased spectral purity directly translated into a larger information bandwidth of the laser beam and longer possible transmission distances in the optical fiber. The result was that more information could be carried farther and faster than ever before.

That unprecedented spectral purity was a direct consequence of the incorporation of a nanoscale corrugation within the multilayered structure of the laser, which acted as an internal filter that discriminated against “noisy” waves contaminating the ideal wave frequency.

Despite the successful 40-year run of the old S-DFB laser, its spectral purity no longer satisfies today’s fast-growing demand for bandwidth.

“What became the prime motivator for our project was that the present-day laser designs — even our S-DFB laser — have an internal architecture which is unfavorable for high spectral-purity operation. This is because they allow a large and theoretically unavoidable optical noise to comingle with the coherent laser and thus degrade its spectral purity,” the researchers told Caltech’s Jessica Stoller-Conrad.

The old S-DFB laser consists of continuous crystalline layers of materials known as III-V semiconductors, which convert into light the applied electrical current flowing through the structure. Once generated, the light is stored within the same material.

Since III-V semiconductors are also strong light absorbers, which leads to a degradation of spectral purity, the researchers wanted to find a different solution for their new laser.

So they developed a new, high-coherence laser that still converts current to light using the III-V material, but stores the light in a layer of silicon, which does not absorb light. Spatial patterning of this silicon layer causes the silicon to act as a light concentrator, pulling the newly generated light away from the light-absorbing III-V material and into the near absorption-free silicon.

This higher spectral purity offers a 20 times narrower range of frequencies than possible with the S-DFB laser, something that could be particularly important for the future of fiber-optic communications.

Originally, laser beams in optic fibers carried information in pulses of light – data signals were impressed on the beam by rapidly turning the laser on and off, and the resulting light pulses were carried through the optic fibers. However, to meet the ever-increasing demand for bandwidth, communications system engineers are now adopting a new method of impressing the data on laser beams known as coherent phase communication, which no longer requires this “on-off” technique.

In coherent phase communications, the data resides in small delays of just a tiny fraction (10-16) of a second in the arrival time of the waves. These delays can accurately relay the information even over thousands of miles, the researchers said.

The digital electronic bits carrying video, data, or other information are converted at the laser into tiny delays in the otherwise steady light wave. However, the number of possible delays, and thus the data-carrying capacity of the channel, is fundamentally limited by the degree of spectral purity of the laser beam.

Yariv and his team concluded that while absolute purity can never be achieved due to limitations set forth by the laws of physics, they have nevertheless tried to come as close as possible to achieving this goal.

A paper about the work, entitled “High-coherence semiconductor lasers based on integral high-Q resonators in hybrid Si/III-V platforms,” was published last week in the journal Proceedings of the National Academy of Sciences.

In addition to Yariv, Santis, and Steger, other coauthors include graduate student Yaakov Vilenchik, and former graduate student Arseny Vasilyev (PhD, ’13).

Prolonged Sitting Doubles Risk Of Disability For Senior Citizens

Lee Rannals for redOrbit.com – Your Universe Online

According to a new Northwestern Medicine study, every additional day spent sitting for someone 60 years or older doubles their risk of becoming disabled.

The study is the first to show how prolonged sitting adds to the risk factor for disability. The findings show that sedentary behavior is almost as strong a risk factor for disability as lack of moderate exercise.

According to the researchers, if there are two 65-year-old women, one of which is sedentary for 12 hours a day and another for 13 hours a day, the second one is 50 percent more likely to be disabled.

“This is the first time we’ve shown sedentary behavior was related to increased disability regardless of the amount of moderate exercise,” Dorothy Dunlop, professor of medicine at Northwestern University Feinberg School of Medicine and lead author of the study, said in a statement. “Being sedentary is not just a synonym for inadequate physical activity.”

Disability is defined by limitations in being able to do basic activities like eating, dressing, bathing, getting in and out of bed and walking across a room. Being disabled increases hospitalization risk and institutionalization, and is the leading source of health care costs.

The team’s study focused on 2,286 adults aged 60 and older from the National Health and Nutrition Examination Survey (NHANES). The researchers compared people in similar health with the same amount of moderate vigorous activity, which could be defined as walking briskly.

Participants wore accelerometers from 2002 to 2005 to measure their sedentary time and moderate vigorous physical activity. The monitoring method in the study was significant because it is objective.

Previous studies indicated a relationship between sedentary behavior and disability, but it was based on self-reports and couldn’t be verified. However, this study relied on the accelerometer data, which is impartial.

Dunlop said that discovering how being sedentary was as strong a risk factor for disability as lack of moderate vigorous activity was surprising.

“It means older adults need to reduce the amount of time they spend sitting, whether in front of the TV or at the computer, regardless of their participation in moderate or vigorous activity,” she said

The researchers made some suggestions to help people cut back on sedentary time, such as standing up while talking on the phone or during a work meeting. They also suggest to park in a spot farther away from the door when going to a grocery store, or walk around the house when having to get up to go get a glass of water.

What Makes El Niño Taimasa Different From Normal El Niño?

University of Hawaii

During very strong El Niño events, sea level drops abruptly in the tropical western Pacific and tides remain below normal for up to a year in the South Pacific, especially around Samoa. The Samoans call the wet stench of coral die-offs arising from the low sea levels “taimasa” (pronounced [kai’ ma’sa]). Studying the climate effects of this particular variation of El Niño and how it may change in the future is a team of scientists at the International Pacific Research Center, University of Hawai’i at Mānoa and at the University of New South Wales, Australia.

Two El Niño Taimasa events have occurred in recent history: 1982/83 and 1997/98. El Niño Taimasa differs from other strong El Niño events, such as those in 1986/87 and 2009/10, according to Matthew Widlansky, postdoctoral fellow at the International Pacific Research Center, who spearheaded the study.

“We noticed from tide gauge measurements that toward the end of these very strong El Niño events, when sea levels around Guam quickly returned to normal, that tide gauges near Samoa actually continued to drop,” recalls Widlansky.

During such strong El Niño, moreover, the summer rain band over Samoa, called the South Pacific Convergence Zone, collapses toward the equator. These shifts in rainfall cause droughts south of Samoa and sometimes trigger more tropical cyclones to the east near Tahiti.

Using statistical procedures to tease apart the causes of the sea-level seesaw between the North and South Pacific, the scientists found that it is associated with the well-known southward shift of weak trade winds during the termination of El Niño, which in turn is associated with the development of the summer rain band.

Looking into the future with the help of computer climate models, the scientists are now studying how El Niño Taimasa will change with further warming of the planet. Their analyses show, moreover, that sea-level drops could be predictable seasons ahead, which may help island communities prepare for the next El Niño Taimasa.

Food Packages Can Be Harmful To Your Health In The Long Run

Lee Rannals for redOrbit.com – Your Universe Online

Researchers writing in the Journal of Epidemiology and Community Health say that chemicals found in packaging and processed foods could be harmful to health over the long term.

Environmental scientists wrote in a commentary piece featured in the journal about how these synthetic chemicals are able to find their way into the foods we eat. Some of these chemicals are regulated, but over time people eating packaged or processed foods are being exposed to low levels of these substances throughout their lives, the scientists say.

The authors claim that too little is known about the long term impact of these chemicals, including at crucial stages of human development. They point out that lifelong exposure to food contact materials (FCMs) – substances used in packaging and processing – is a cause for concern for several reasons.

Toxicants like formaldehyde are legally used in some materials, despite being known as a cancer causing substance as well as a way to preserve dead bodies. Formaldehyde is widely used in plastic bottles for fizzy drinks and melamine tableware. Other chemicals known to disrupt hormone production also can be found in FCMs, including bisphenol A, tributyltin, triclosan, and phthalates.

“Whereas the science for some of these substances is being debated and policy makers struggle to satisfy the needs of stakeholders, consumers remain exposed to these chemicals daily, mostly unknowingly,” the authors wrote in the journal.

The scientists say potential cellular changes caused by these chemicals and in those with the capacity to disrupt hormones are not being considered in routine toxicology analysis. The authors suggest that this casts serious doubts on the adequacy of chemical regulatory procedures.

The environmental scientists say establishing potential cause and effect results from these substances is not easy because there are no unexposed populations to compare it with. However, they stress that some sort of study is needed to tease out any potential links between food contact chemicals and chronic conditions like cancer, obesity, diabetes, neurological and inflammatory disorders.

“Since most foods are packaged, and the entire population is likely to be exposed, it is of utmost importance that gaps in knowledge are reliably and rapidly filled,” the authors wrote.

There Is Nothing So Sweet As A Voice Like Your Own

University of British Columbia

Have you ever noticed that your best friends speak the same way? A new University of British Columbia study finds we prefer voices that are similar to our own because they convey a soothing sense of community and social belongingness.

While previous research has suggested that we prefer voices that sound like they are coming from smaller women or bigger men, the new study – published today in the journal PLOS ONE – identifies a variety of other acoustic signals that we find appealing.

“The voice is an amazingly flexible tool that we use to construct our identity,” says lead author Molly Babel, a professor in the Department of Linguistics. “Very few things in our voices are immutable, so we felt that our preferences had to be about more than a person’s shape and size.”

Aside from identifying the overwhelming allure of one’s own regional dialects, the study finds key gender differences. It showed a preference for men who spoke with a shorter average word length, and for “larger” sounding male voices, a finding that supports previous research.

For females, there was also a strong preference for breathier voices – a la Marilyn Monroe – as opposed to the creakier voices of the Kardashians or Ellen Page. The allure of breathiness – which typically results from younger and thinner vocal cords – relates to our cultural obsession with youthfulness and health, the researchers say. A creaky voice might suggest a person has a cold, is tired or smokes regularly.

Babel says the findings indicate that our preference for voices aren’t all about body size and finding a mate, it is also about fitting in to our social groups.

BACKGROUND

Babel and her colleagues at the University of California, Santa Cruz asked college-aged participants in California to rate the attractiveness of male and female voices from people living west of the Mississippi River.

They found that participants preferred different acoustic signals for males and females – and the strongest predictors of voice preference are specific to the community that you’re a part of.

For example, the Californian participants had a strong preference for female voices that pronounced the “oo” vowel sound from a word like “goose” further forward in the mouth. This has been a characteristic of California speech since at least the early 1980’s. In many other regions of North America, people would pronounce the “oo” sound farther back in the mouth, as one might hear in the movie Fargo.

The preference for males who had shorter average word length relates to a difference between how men and women speak. In North American English, longer average word length is a style typically used by women while shorter average word length is one used by men. The preference for men with shorter average word length connects to what we consider normal or average.

Foreign accents

Given the anecdotal evidence of people’s preference for foreign accents, Babel theorizes that at a certain point the exotic is also appealing. “Once you are outside of a certain range of familiarity, novel and exotic sounding voices might become more attractive,” she says. “We also have to keep in mind that we find some accents more preferable than others because of social stereotypes that are associated with them.”

Sexual Dimorphism In Pinnipeds Began Around 20 To 27 Million Years Ago

April Flowers for redOrbit.com – Your Universe Online
Pinning down the answer to a widely-asked question is one of the most exciting things a researcher can do. For Thomas Cullen, who completed the research as part of his Master’s degree at Carleton University, this experience came early in his career. Cullen, working with Canadian Museum of Nature paleontologist Dr. Natalia Rybczynski, made a ground-breaking discovery about pinnipeds — the suborder that makes up seals, sea lions, and walruses.
The findings, published in Evolution, relate to the sexual dimorphism in a variety of pinniped species. The differences in appearance between males and females of a species — including color, shape, size and structure — are considered sexual dimorphism. In many species of pinnipeds, males are often much larger — sometimes as much as twice as large — as the females. This size difference has implications for how they mate and behave.
The Steller’s Sea Lion and Northern Fur Seal are examples of dimorphic pinnipeds that mate in a harem, with one male presiding over a larger community of female mates. For non-dimorphic pinnipeds, such as the Ringed Seal, this is not a typical mating behavior. These observations underline the intimate link between sexual dimorphism and mating style.
Why sexual dimorphism exists in many pinniped species, and when this trait evolved, are questions that have puzzled researchers for a long time. When the research team examined fossils of an extinct pinniped, they discovered an incontrovertible answer to the question of when. Cullen, who is now at the University of Toronto, examined the fossil at the Canadian Museum of Nature before analyzing the data in the lab of Professor Claudia Schröder-Adams.
“We were examining a fossil of a pinniped that was previously thought to be a juvenile, but we looked at it again and found that, based on its skull structure, it was likely an adult,” says Cullen. Combined with analysis comparing this fossil to others of the same species and modern dimorphic species, this discovery proved that the fossil belonged to a sexually dimorphic species.
The pinniped fossil, Enaliarctos emlongi, was discovered in the late 1980s off the coast of Oregon. During Cullen’s study, the fossil was on loan to the Canadian Museum of Nature from the Smithsonian Institution.
Danielle Fraser, Carleton PhD candidate, collaborated with Cullen to compare the fossil to modern seal skull structure. The evidence revealed that sexual dimorphism existed in seals somewhere between 20 million and 27 million years ago, near the base of all pinniped evolution and much longer ago than was previously thought. This discovery, which has implications for the past and future of the species, made Cullen one of the first to pin down a timeline for the phenomenon.
“Early pinnipeds likely formed harems, the way a sea lion would,” says Cullen. “Up to this point, it was not widely expected that early pinnipeds would behave this way.”
Once the question of when sexual dimorphism in pinnipeds emerged, Cullen and his team tackled the question of why it happened. “Our interpretation is that these changes were happening at a time when the Earth was experiencing major climate and ocean circulation changes. Harem colonies were likely located at ocean upwelling sites that concentrate nutrients in otherwise nutrient-poor water. We think that this environmental factor, this concentration of large numbers of pinnipeds into one area, pressured them into developing the harem mating system and sexual dimorphism.”
The study results shed light on the history of pinnipeds and have major implications for the future of the species when taken in the modern context of climate change.
“Climate change today appears to be having an effect on the Arctic and Antarctic more than on the temperate and equatorial latitudes. Most Arctic and Antarctic pinnipeds aren’t really sexually dimorphic, and we think this is because the water in those areas is quite nutrient rich. The pinnipeds there didn’t have that selection pressure to form harem behavior because of the wide availability of nutrients. Going forward, if the effect of climate change is increased water temperature in the Arctic and Antarctic, it would suggest that the nutrient levels will be reduced. This could put more pressure on pinnipeds in the polar regions areas to form colonies and, as a result, harem behavior.”
The findings present some of the earliest evidence in marine mammals of Charles Darwin’s theories of sexual selection in evolution. Until now, there has been a relative lack of new data on sexual dimorphism in the fossil record.
“This paper shows that the fossil record can be really useful in answering evolutionary questions that could otherwise not be addressed,” says Cullen. “It also shows that a combination of modern and fossil analysis is crucial to thoroughly addressing evolutionary problems. We were really lucky to have access to a specimen of this nature.”

ESA Selects PLATO Mission To Join The Hunt For Extrasolar Planets

[ Watch the Video: The Newest Exoplanet Hunter – PLATO ]
April Flowers for redOrbit.com – Your Universe Online
One of the hottest topics in 21st century science is the exploration of planets around stars other than our own Sun. These planets are known as extrasolar planets, or “exoplanets.” One of the key goals of such research is to discover and learn about the properties of Earth-like worlds in the Sun’s neighborhood. The European Space Agency (ESA) is preparing a new space mission, named Planetary Transits And Oscillations Of Stars (PLATO), to do exactly that. Scheduled for launch in 2024, ESA expects PLATO to return firm discoveries of Earth-like planets at Earth-like distances from stars similar to our Sun after collecting three years worth of observational data.
PLATO was selected for implementation as part of ESA’s Cosmic Vision 2015-2025 Program out of five “M3” type missions proposed at the regular meeting of the ESA Science Program Committee this month. The mission is scheduled to last six years.
As yet, not one single Earth-like exoplanet in a habitable zone around a star similar to our Sun has been found or characterized. If successful, PLATO will be a pioneer in finding new worlds for humanity to explore.
Don Pollaco, University of Warwick professor of physics and leader of the PLATO Science consortium, commented in a recent statement, “This is fantastic news for Europe, PLATO will allow the first systematic survey of nearby planets for indications from advanced life forms (as well as slime). A few years ago this would have been science fiction and now it’s coming to pass as science fact.”
Many UK organizations will be participating in developing the instrument: e2V Technology and UCL will supply the Charge-Coupled Devices (CCD) sensors, much of the imaging software will come from Cambridge University, and Open University will handle Public Outreach.
Dr. Heike Rauer of the German Aerospace Center (DLR) will lead the PLATO mission. “PLATO will begin a completely new chapter in the exploration of extrasolar planets,” Dr Rauer confidently predicts. “We will find planets that orbit their star in the life-sustaining ‘habitable’ zone: planets where liquid water is expected, and where life as we know it can be maintained.”
So that detailed comparisons with our own solar system can be made, PLATO will measure the sizes, masses, and ages of planetary systems it finds. “In the last 20 years more than one thousand exoplanets have been discovered, with quite a few multi-planetary systems among them,” Rauer explained. “But almost all of these systems differ significantly from our Solar System in their properties, because they are the easiest-to-find examples. PLATO firmly will establish whether systems like our own Solar System, and planets like our own Earth are common in the Galaxy.”
PLATO will use the periodic dimming of the detected starlight, caused by a planet orbiting in front of the star and blocking PLATO’s view of a fraction of the starlight, to detect exoplanets. This will be accomplished with an array of 34 separate 12-centimeter telescopes and cameras mounted on an observing platform in the space probe, which will be used to investigate approximately a million stars spread out over half the sky. These “eyes” can be combined in many different configurations, giving PLATO unprecedented capabilities to simultaneously observe both bright and dim objects. Positioned at one of the Lagrangian Points (specifically L2), where the gravitational pull of the Sun and the Earth cancel each other out, PLATO will stay at a fixed position in space. L2 is approximately 930 million miles beyond Earth, as seen from the Sun.
PLATO will also use astroseismology to measure tiny changes in detected starlight that are caused by small vibrations in the host stars. The vibrations reveal the internal structure of the vibrating body, just like on Earth. We are able to learn the age of the vibrating star and the planets orbiting it with astroseismology.
PLATO’s measurements, coupled with ground-based radial velocity observations, will allow researchers to calculate a planet’s mass and radius, and therefore its density. These measurements will provide an indication of its composition, needed to properly describe a planet. “The observation of planets in many different states of their evolution will give us clues for the past and the future of our own planetary system,” Dr Rauer remarked. “By no means do we know all about the youth of our Solar System.”
Only by knowing the measurement of both the radius and mass of a planet may scientists distinguish between a “mini-Neptune” with a high gas content, but a low density – like the two outermost planets in the Solar System – or a rocky planet with an iron core, like the Earth. The habitability of a planet cannot be determined without this information, and these two fundamental parameters are not known with sufficient precision for most exoplanets.
With its array of telescopes and the largest camera-sensor ever flown in space (comprised of 136 CCD sensors with a combined area of 0.9 square meters), PLATO is a completely new type of space telescope. The spaceship’s placement will give it the advantage of continuous observation without the interruption of sunrise, or the blurring caused by the Earth’s atmosphere.
These unique attributes should allow PLATO to discover planets smaller than Earth, and planets at distances from their host stars similar to the Earth-Sun distance. Only a few such small planets are known at star-planet distances comparable or greater than Earth’s. The catalogue of potentially habitable planets that PLATO will build will form the basis for follow-up measurements to confirm discoveries of new planets, using the European Southern Observatory’s European Extremely Large Telescope (E-ELT), or the next generation of large space telescopes, like NASA’s James Webb Space Telescope.
“PLATO, with its unique ability to hunt for Sun–Earth analogue systems, will build on the expertise accumulated with a number of European missions, including CoRot and Cheops,” added Alvaro Giménez, ESA’s Director of Science and Robotic Exploration.
“Its discoveries will help to place our own Solar System’s architecture in the context of other planetary systems.”

Rhythm Needed By Babies’ Hearts To Develop Correctly

David Salisbury – Vanderbilt Universtiy

To develop correctly, baby hearts need rhythm…even before they have blood to pump.

“We have discovered that mechanical forces are important when making baby hearts,” said Mary Kathryn Sewell-Loftin, a Vanderbilt graduate student working with a team of Vanderbilt engineers, scientists and clinicians attempting to grow replacement heart valves from a patient’s own cells.

In an article published last month in the journal Biomaterials the team reported that they have taken an important step toward this goal by determining that the mechanical forces generated by the rhythmic expansion and contraction of cardiac muscle cells play an active role in the initial stage of heart valve formation.

A heart valve is a marvelous device. It consists of two or three flaps, called leaflets, which open and close to control the flow of blood through the heart. It is designed well enough to cycle two to three billion times in a person’s lifetime. (Humans and chickens are outliers: Most other animals, large and small, have hearts that beat about one billion times in their lives.) However, heart valves can be damaged by diseases such as rheumatic fever and cancer, aging, heart attacks and birth defects.

“For the last 15 years, people have been trying to create a heart valve out of artificial tissue using brute-force engineering methods without any success,” said Assistant Professor of Biomedical Engineering W. David Merryman. “We decided to take a step back and study how heart valves develop naturally so we can figure out how to duplicate the process.” To do so, they designed a series of experiments with chickens, whose hearts develop in a fashion similar to the human heart.

“The discovery that the deformations produced by the beating cardiac muscle cells are important provides an entirely new perspective on the process,” said Merryman, who directed the three-year study.

The Vanderbilt effort is part of a broader program to develop artificial organs named the Systems-based Consortium for Organ Design and Engineering (SysCODE). It is a National Institutes of Health “Roadmap” initiative to speed the movement of scientific discoveries from the bench to the bedside.

“This is the second major advance that we’ve made,” said Professor of Pharmacology Joey Barnett, co-principal investigator of the heart valve project.

Last spring, the Vanderbilt team announced that they had identified the unique genes and molecular pathways associated with valve formation. “These included both genes and pathways that we knew about and several that were previously unknown,” said Barnett, who has studied heart valves for more than 20 years.

“The genetic study gave us the list of the basic parts – the hardware – required to build a heart valve and this latest study provides us with the information we need about the environment that is required,” said the biologist. “With this information, we should have what we need to create valvular interstitial cells, which are the basic building blocks of heart valves.”

The heart starts out as a simple, U-shaped tube of tissue. (In the case of the chicken embryo, it is about the size of a comma on the printed page.) The tube has three layers. The outer layer is made up of cardiac muscle cells that begin pulsing before blood vessels form and attach to the heart. The inner layer consists of specialized endothelial cells, the type of cells that line the interior of blood vessels. Sandwiched between the two is a layer of a complex gelatinous material called cardiac jelly.

At the locations of the inflow and outflow valves, the walls of the tube thicken to form “cushions” of cardiac jelly. After the cushions are formed, the endothelial cells in the region embed themselves in the cushion and transform into valvular interstitial cells, or VICs. The VICs, in turn, begin guiding the process that transforms the cardiac jelly in the cushion into valve leaflets.

One of the standard laboratory methods for studying the early stages of heart development is to use microsurgery to remove a chick heart from an embryo and place it in a cell-culture dish filled with collagen gel.

However, the method was not suitable for studying mechanical forces so Sewell-Loftin had to modify it substantially. She found one key was to include a complex sugar called hyaluronic acid, which is found in cardiac jelly.

Next, she had to devise a method to measure the amount of deformation that the pulsation of the heart muscle cells causes in the gel. She did so by creating a computer program that analyzed sequences of microscope images of the gel surface to estimate the forces caused by the pulsing cells.

When Sewell-Loftin compared her maps with the locations where VICs were being formed, she found that cells were transforming preferentially in areas of high strain.

The team’s next step is to collaborate with a researcher who works with induced pluripotent stem cells – a type of stem cell that can be generated directly from adult cells – to produce endothelial cells. Once they have these cells, they hope to produce human VICs. In addition to guiding the initial formation of the heart, VICs are known to play a role in maintaining valve health in adults. So they could provide a better way to repair calcified heart valves, the major cause of open-heart surgery in adults, the researchers speculate.

Once they can make human VICs, there is a good chance that they will create artificial human heart valves when they are placed in a properly designed bioreactor, the researchers anticipate. And once they have artificial human heart valves, they could be used to replace defective valves when needed in the 40,000 babies born with congenital heart defects each year. Hopefully, these artificial valves would grow with the child. Current replacement valves are made out of plastic so they do not grow with a child. That means these young patients must endure multiple surgeries, which multiplies their risk of harmful complications.

H. Scott Baldwin, the Katrina Overall McDonald Chair of Pediatrics, graduate student Daniel M. DeLaughter, undergraduate student Jon R. Peacock, and Christopher Brown, research assistant professor of pediatrics, contributed to the study.

The research was supported by grants from the American Heart Association, National Science Foundation grant 1055384 and National Institutes of Health grants HL094707 and HL092551. Tyson Foods, Inc. donated the fertilized chicken eggs used in the study.

NASA Satellite Discovers Cloudy Conditions Around Black Holes

[ Watch the Video: The Cloudy Cores of Active Galaxies ]

Lee Rannals for redOrbit.com – Your Universe Online

An international team of astronomers used NASA’s Rossi X-ray Timing Explorer (RXTE) satellite data and found huge clouds of gas orbiting supermassive black holes.

Scientists collected 16 years of data from RXTE, a decommissioned low-earth orbit satellite that was equipped with instruments that measured variations in X-ray sources. This treasure trove of data revealed a dozen instances when the X-ray signal dimmed for periods of time ranging from hours to years, presumably when a cloud of dense gas passed between the source and satellite.

“One of the great unanswered questions about AGN is how gas thousands of light-years away funnels into the hot accretion disk that feeds the supermassive black hole,” Alex Markowitz, an astrophysicist at the University of California, San Diego and the Karl Remeis Observatory in Bamberg, Germany, said in a statement. “Understanding the size, shape and number of clouds far from the black hole will give us a better idea of how this transport mechanism operates.”

This is the first study to survey the environments around supermassive black holes and is the longest-running AGN-monitoring study yet performed in X-rays. The team, publishing a paper in the journal Monthly Notices of the Royal Astronomical Society, described the various properties of the clouds, including how they ranged in size.

The clouds found orbit a few light-weeks to a few light-years from the center of the active galactic nuclei. The team said a cloud found in a spiral galaxy in the direction of the constellation Centaurus appears to be in the midst of being torn apart by tidal forces.

“In 2008, the AGN dimmed twice over a period of 11 days and did not reach its typical X-ray brightness within that period,” co-author Mirko Krumpe, of the European Southern Observatory in Garching, Germany, said in a statement. “This could be caused by an elongated, filamentary cloud, perhaps one that is in the process of being torn apart by the black hole.”

This study has helped triple the number of cloud events previously identified by the RTXE satellite. Instruments on board the satellite measure X-ray emissions on timescales as short as microseconds to as long as years. The satellite was decommissioned by NASA back in 2012, but it still had 16 years of successful operation.

“Because RXTE performed sustained observations of many of these AGN, our research is sensitive to a wide range of cloud events, from those as brief as five hours to as long as 16 years,” co-author Robert Nikutta, a theorist at Andrés Bello University in Santiago, Chile, said in a statement.

Even Police Officers Should Be Concerned About Sedentary Lifestyle

Lee Rannals for redOrbit.com – Your Universe Online
A team from the University of Iowa has found that even police officers should be concerned of a sedentary lifestyle from sitting most of the day.
Researchers measured physical activity in police, which is a career that is looked at by the public as being generally active. The findings revealed that police officers burn as much energy on the job as someone sitting while holding a baby or washing dishes.
“We find that police work is primarily sedentary,” Sandra Ramey, assistant professor in the University of Iowa College of Nursing, told IowaNow’s Richard C. Lewis. “The public view, how the media portray it on shows like ‘Hawaii Five-0,’ it’s just go, go, go – it’s an intense, high-activity profession. But it’s not. It’s more like bursts of energy, with long periods of little activity.”
Ramey, author of the study published in the Journal of Occupational and Environmental Medicine, said the team’s findings are important because workers are increasingly being put in sedentary settings.
“The police are not alone, in that most jobs are associated with using higher technology at the expense of physical activity in the workplace. And, so what it means is that other occupations, like police, should increase movement on the job,” she said.
According to a 2005 study published in the journal Annual Review of Public Health, four in 10 American employees in 2000 worked in low physical-activity occupations, double the percentage of 50 years ago. The National Center for Chronic Disease Prevention and Health Promotion found that 25 percent of US adults do not exercise in their leisure time.
A lack of physical activity increases the risk of cardiovascular disease, which is the leading cause of death in the US. Being able to inspire the US community to rise up from a sedentary job and add a little exercise could put a damper in the $76 billion cardiovascular disease costs the US economy each year.
The researchers measured physical activity in 119 police officers in six departments in the Midwest and Hawaii. During the study, the police officers were asked to wear armbands that measured activity continuously for 96 hours, including three work days and one day off.
On average, the team found that police officers expended 1.6 metabolic equivalents per minute of energy during their shifts, which is about the equivalent of washing dishes while standing or reclining and holding a baby.
“In other words, the physical demands of police work are generally comparable to sitting or standing,” the team wrote in the journal.
The researchers discovered that high-ranking officers moved even less than their counterparts, and university police were even more active.
“The take-home message is police officers are in a sedentary profession, and we now have something beyond self-report that shows that,” Ramey says. “We need to encourage movement.”

Plotting The Destruction Of A Star As It Falls Into A Black Hole

April Flowers for redOrbit.com – Your Universe Online

Exploring the universe’s most violent events using computer simulations is what Enrico Ramirez-Ruiz does. So in 2012, when the first detailed observations of a star being ripped apart by a black hole were reported in Nature, Ramirez-Ruiz was eager to compare the data to his simulations. This was especially true because he doubted one of the published conclusions: that the disrupted star was a rare helium star.

“I was sure it was a normal hydrogen star and we were just not understanding what’s going on,” Ramirez-Ruiz, a professor of astronomy and astrophysics at the University of California, Santa Cruz, told Tim Stephens in a recent statement.

The findings of Ramirez-Ruiz’s team, currently online at arXiv.org and appearing in an upcoming issue of the Astrophysical Journal, explain what happens during the disruption of a normal sun-like star by a supermassive black hole. The study also reveals why observers might fail to see evidence of hydrogen in the star. Ramirez-Ruiz collaborated with USCS graduate student James Guillochon, who is now an Einstein Fellow at Harvard University, and undergraduate student Haik Manukian to run a series of detailed computer simulations of encounters between stars and black holes.

[ Watch the Video: Formation of a Debris Disk After Tidal Disruption Of A Star By A Supermassive Black Hole ]

Scientists believe that supermassive black holes lurk at the center of most galaxies. Some are very bright, emitting intense radiation from superheated gas falling into the black hole. These are known as active galactic nuclei. These are rare, however, as the central black holes of most galaxies have run out of gas and are quiescent. The galactic center of these galaxies only emits a bright flare when some unlucky star approaches too close and is shredded by the powerful tidal force of the black hole, in what is known as a “tidal disruption event” (TDE). In a typical galaxy, TDEs happen about once every 10,000 years.

“That means you have to survey the nearest 10,000 galaxies in order to see one event, so for many years this was very much a theoretical field,” Ramirez-Ruiz said.

That was true until the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) began surveying the sky on a continual basis. Pan-STARRS has begun detecting and recording observations of the rare TDEs—the first of which, PS1-10jh, was observed in 2010 and published in 2012. Astronomers recorded the rise and fall in brightness over time, called the light curve, and took a spectrum at peak brightness to examine the different wavelengths of light.

Characteristic “emission lines” at specific wavelengths are shown in the spectrum of an active galactic nucleus (AGN). These emission lines correspond to the most common elements such as hydrogen and helium, and appear as spikes of increased intensity in a continuous spectrum. In PS1-10jh, however, the scientists were shocked by the absence of a hydrogen line in the spectrum.

“It’s very unusual to have seen helium and not hydrogen. Stars are mainly made of hydrogen, and stars made only of helium are extremely rare, so this was a huge issue,” Guillochon said. “People said maybe it was a giant star with a helium core and a hydrogen envelope, and the black hole removed the hydrogen first and then the helium core in a second pass.”

Using computer simulations performed on the UCSC Pleiades, Hyades, and Laozi computer clusters and the NASA Pleiades computer cluster, Guillochon began to explore the possibilities. The results of his investigation provide a new understanding of the origin of the emission lines in a TDE, showing that the flare of light from a tidal disruption contains information about the type of star and the size of the black hole. The findings also show that PS1-10jh involved the most common type of star (a main-sequence star much like our sun) and a relatively small supermassive black hole.

As a supermassive black hole disrupts a star, the tidal forces stretch the star into an elongated blob before shredding it. About half the star’s mass is ejected in a full disruption, and half remains bound in elliptical trajectories. The trapped mass eventually forms an “accretion disk” of material that spirals into the black hole.

Prior to this study, researchers thought the unbound material formed a wide “fan” of ejected material, which was the main source of emission lines. In the new computer simulations, however, the unbound material is confined by self-gravity into a narrow band that doesn’t have enough surface area to be the source of the emission lines. The accretion disk, therefore, must be the source of the emission lines. The simulations demonstrate how such a disk forms over time, beginning with the inner part and growing outward.

Ramirez-Ruiz likens this process to watching the birth of an AGN, as the emission lines in a tidal disruption event correspond to the well-studied “broad line region” of AGNs. The emission lines of different elements in an AGN are produced at different distances from the central black hole. For example, helium lines are generated deep in, while hydrogen lines are produced farther out where the intensity of ionizing radiation is slightly lower. When the Pan-STARRS astronomers took the spectrum of PS1-10jh, the accretion disk simply had not grown big enough to reach the distance where hydrogen starts to produce an emission line.

“The hydrogen is there, you just don’t see it because it is so highly ionized. The way to understand the spectrum of a TDE is to think of it as an AGN with a truncated disk, because the disk is still growing,” Guillochon said. “In an AGN, the emission is steady because the disk is established. In our model of tidal disruption, you are seeing the broad line region being built.”

Another TDE, PS1-11af, was recently detected. The spectrum of this TDE had neither hydrogen nor helium emission lines. “Our model tells us that this would have to be a smaller black hole, and when the spectrum was taken the disk was so small you would not expect to see either hydrogen or helium,” Guillochon said.

The new study, which was supported by the David and Lucille Packard Foundation, the National Science Foundation (NSF), and NASA, also explains how the light curve of a TDE can yield information about the masses of both the star and the black hole. The observed light curves match remarkably well with those derived from the simulations. “With this simple model, we get a perfect fit to the data, and we’re able to explain the light curve in multiple color bands,” Ramirez-Ruiz said. “The type of star and the size of the black hole are imprinted in the light curve.”

Ramirez-Ruiz says that Pan-STARRS is expected to detect dozens of tidal disruptions, while the planned Large Synoptic Survey Telescope (LSST) could detect thousands a year. This would allow astronomers to study quiescent black holes at the centers of local galaxies that would otherwise be difficult if not impossible to detect. If a supermassive black hole is not emitting light, it reveals its presence only through its effects on the motions of stars. The smaller the relative size of the black hole, the harder it becomes to observe those effects.

“We are now detecting black holes that are very close to the detection limit,” Ramirez-Ruiz said. “Tidal disruption is elucidating a local population of low-mass quiescent black holes, and it is going to enable us to test the idea that every galaxy has a black hole at its center, even the tiny ones.”

Nose Bacteria Points To Higher BMI In Men

Brett Smith for redOrbit.com – Your Universe Online

In addition to being stigmatized as less attractive, overweight men tend to have more potentially pathogenic species of bacteria in their nose, compared to slimmer, more traditionally attractive men, according to a new study in the American Journal of Human Biology.

“According to an evolutionary point of view, traits related to attractiveness are supposed to be honest signals of biological quality,” said study author Boguslaw Pawlowski, from Department of Human Biology at the University of Wroclaw. “We analyzed whether nasal and throat colonization with potentially pathogenic bacteria is related to body height and BMI in both sexes.”

In the study, scientists gathered the self-reported heights and weights of more than 100 healthy females and 90 healthy males. The study team also assessed waist and hip circumferences. Next, six potentially pathogenic bacteria were isolated and identified from nasal and throat swabs.

The study results revealed that ‘colonized’ male participants had a greater BMI than ‘non-colonized’ men. A significant similar contrast was not identified in female participants.

“To our knowledge, this is the first attempt to study body morphology traits related to physical attractiveness in relation to bacterial colonization in young people,” Pawlowski said. “The results confirmed our hypothesis, but only for BMI in males.”

While researchers in Poland may have found a way to identify a man’s BMI by the cultures in his nose, a team of scientists based in Philadelphia has been able to show that a human ear wax sample provides clues to a person’s ethnic origins.

According to a new study published in Journal of Chromatography B, researchers at the University of Pennsylvania found that the amount of odor-producing chemical compounds in human earwax varied between individuals of East Asian origin and Caucasians.

Also known as cerumen, earwax is a blend of secretions from specialized sweat glands along with fatty materials secreted in the sebaceous glands. It usually comes in one of two forms: wet with a yellowish-brown hue, or dry and white.

According to study author George Preti, an organic chemist at the University of Pennsylvania, a small change in the ABCC11 gene is connected to both underarm odor production and if a person has dry or wet earwax. People of East Asian and Native American descent have a form of the gene which codes both for dry earwax and a decreased amount of underarm body odor compared to people of other ethnic groups, the researchers said.

“Our previous research has shown that underarm odors can convey a great deal of information about an individual, including personal identity, gender, sexual orientation, and health status,” Preti said.

In the earwax study, researchers gathered earwax from eight healthy Caucasian males and eight men of East Asian descent. Each sample was placed in a vial and heated for 30 minutes, which prompted the release of volatile organic compounds (VOCs), which were analyzed using chromatography-mass spectrometry methods. The researchers found 12 VOCs that were in the earwax of all the men, yet Caucasians possessed greater amounts of 11 of the 12 VOCs than East Asians.

“In essence, we could obtain information about a person’s ethnicity simply by looking in his ears. While the types of odorants were similar, the amounts were very different,” explained lead author Katharine Prokop-Prigge, a chemist and postdoctoral fellow at the Monell Chemical Sense Center in Philadelphia.

Scientists Discover Bending Rules For Animal Propulsion

Marine Biological Laboratory

A Navy-sponsored project to design a biologically inspired, swimming jellyfish robot has led scientists to the surprising discovery of common bending rules for the tips of wings, fins, flukes, mollusk feet, and other propulsors across a broad range of animal species.

The study, led by John H. Costello of Providence College and the Marine Biological Laboratory (MBL) in Woods Hole, where he is a visiting scientist, is published this week in Nature Communications.

By studying videos of 59 different animals—from fruit flies to humpback whales—propelling in steady-state motion through air or water, the team discovered that the animals’ propulsors bend in a similar way at the tip, with a highly constrained and predictable range of characteristic movements. (Steady-state motion is continual, replicable cycles of propulsive motion, in contrast to rapid acceleration or deceleration.)

“We were interested in looking at how many animals use flexible margins (or tips) on their propulsors because we know in the jellyfish vehicle, propulsive proficiency improved by orders of magnitude when we put a passive, flexible, silicone margin around the [jellyfish] bell,” Costello says. “The question for us was, how and why does flexibility increase thrust? And from an engineering standpoint, how do you incorporate flexibility into a design so it does increase thrust?”

The team looked at natural propulsors, which have had millions of years to evolve design efficiencies, for guidance with their models. “We found that the way the propulsors moved—the kinematics—seems to be selected for across this wide range of animals, rather than the material properties, such as feathers or scales, being key,” Costello says. “Discovering these uniform bending characteristics has reoriented our search for understanding the advantages of flexibility in propulsion.”

The paper’s lead author, Kelsey N. Lucas, was an undergraduate advisee of co-author Sean Colin of Roger Williams University at the time of the study, and is now a graduate student at Harvard University. Colin is also an MBL visiting scientist and principal investigator with Costello on the Navy’s jellyfish robot project.

“Flying and swimming animals have a much lower cost of transport (energy needed to move a mass a given distance) than present manmade designs of similar scale,” Costello says. “That is part of our motivation for understanding biological design: Animals do it better.”

Saliva-Based Test Predicts Risk Of Future Clinical Depression In Boys

Brett Smith for redOrbit.com – Your Universe Online

Most teenage boys go through hard times and some can even get depressed. A new saliva-based test can determine if these minor bouts of depression are foreshadowing major depression later in life, according to a new study based in the United Kingdom.

Published in the Proceedings of the National Academies of Science (PNAS), the study found that teenage boys with high levels of the stress hormone cortisol and mild depression symptoms were up to 14 times more likely to experience clinical depression later in life, compared to those with low or normal cortisol levels.

The study is unique in that it offers a metric for determining risk of a condition of the mind, something historically considered somewhat ephemeral.

“This is the emergence of a new way of looking at mental illness,” said study author Joe Herbert, of the University of Cambridge in the UK. “You don’t have to rely simply on what the patient tells you, but what you can measure inside the patient.”

In the study, the scientists collected spit samples from over 1,800 teenagers and assessed levels of cortisol contained in the saliva, along with self-reported data on signs of depression. The teenagers were then divided into one of four groups based on both their cortisol levels and their symptoms of depression.

After tracking the study cohort for 12 to 36 months, the study team determined which group was most likely going to develop clinical depression and other psychiatric conditions in the future.

While the researchers found that boys with higher levels of cortisol and depressive symptoms were 14 times more likely to develop clinical depression, this difference was less significant in female teenage participants, who were four times more likely to develop clinical depression. The researchers took this as a sign that gender variances affect how depression progresses.

The researchers said they hope the newly discovered biomarker for depression will allow primary care services to identify high-risk boys and consider new strategies for this segment of the population.

“This new biomarker suggests that we may be able to offer a more personalized approach to tackling boys at risk for depression,” said study author Matthew Owens, a research associate at University of Cambridge. “This could be a much needed way of reducing the number of people suffering from depression, and in particular stemming a risk at a time when there has been an increasing rate of suicide amongst teenage boys and young men.”

In discussing the study with BBC News, Sam Challis, from the UK mental health charity Mind, pointed out that there are many factors besides the level of cortisol that play a role in the development of depression.

“This study claims there is a biomarker linked to depression, but it’s important to bear in mind that many factors play a part in depression, such as life events, genetic factors, side effects of medication and diet,” he said. “However, this research could help identify those who may need extra support.”

“We know that it is possible to recover from a mental health problem, and this is more likely for those who seek help straight away,” he added.

Elephants Exhibit Compassion For Each Other

[ Watch the Video: What Do Elephants And Humans Have In Common? ]

Brett Smith for redOrbit.com – Your Universe Online

People often reflexively put their arm around someone else in distress and a new study from researchers at Emory University in the journal PeerJ has found that elephants also console each other in times of need.

Study author Joshua Plotnik, a graduate student at Emory, said the physical touches and vocalizations he and his co-author recorded are the first bits of evidence that show elephants try to comfort teach other.

“For centuries, people have observed that elephants seem to be highly intelligent and empathic animals, but as scientists we need to actually test it,” he said.

In addition to humans, this type of consolation has only been seen in great apes, canines and some types of birds.

“With their strong social bonds, it’s not surprising that elephants show concern for others,” said study co-author Frans de Waal, an Emory professor of psychology. “This study demonstrates that elephants get distressed when they see others in distress, reaching out to calm them down, not unlike the way chimpanzees or humans embrace someone who is upset.”

[ Watch the Video: Asian Elephants Reassure Others in Distress ]

In the study, the researchers focused on a group of 26 captive Asian elephants spread over about 30 acres at an elephant preserve in northern Thailand. For almost a year, the scientists viewed and recorded situations when an elephant presented a stress reaction, and the reactions from other nearby elephants. The primary stress responses originated from either unobservable or noticeable stimuli, such as a dangerous animal rustling in the grass or the presence of a rival elephant.

“When an elephant gets spooked, its ears go out, its tail stands erect or curls out, and it may emit a low-frequency rumble, trumpet and roar to signal its distress,” Plotnik said.

The study team discovered that elephants in close proximity affiliated much more with a troubled individual after it had a stress event than during uneventful control periods. For instance, an elephant would go alongside the distressed animal and use its trunk to carefully touch its face or put its trunk in the other animal’s mouth, the equivalent of an elephant handshake or hug.

“It’s a very vulnerable position to put yourself in, because you could get bitten,” Plotnik said. “It may be sending a signal of, ‘I’m here to help you, not hurt you.'”

Sympathizing elephants also used vocalizations as a way to extend emotional help to their stressed colleagues.

“The vocalization I heard most often following a distress event was a high, chirping sound,” Plotnik said. “I’ve never heard that vocalization when elephants are alone. It may be a signal like, ‘Shshhh, it’s okay,’ the sort of sounds a human adult might make to reassure a baby.”

The researchers also found that elephants often responded to the signals of other elephants by adopting a similar body or emotional state – something known as an “emotional contagion” – which may be a sign of empathy.

The researchers noted that their study was limited by the fact that it was restricted to captive animals.

“This study is a first step,” Plotnik said. “I would like to see this consolation capacity demonstrated in wild populations as well.”

Malaysia Confirms H7N9, Cases Continue To Surge In Mainland China

Lawrence LeBlond for redOrbit.com – Your Universe Online

Last week on Feb 12, The World Health Organization (WHO) was informed of a single case of laboratory-confirmed human infection with avian influenza A (H7N9) virus from the Ministry of Health of Malaysia. This is the first case to be reported from Malaysia since the bird flu first broke out nearly a year ago.

The case was in a 67-year-old woman who was on tour from Guangdong Province, China. She arrived in Malaysia with a 17-member tour group, which included relatives, who all had stayed overnight in Kuala Lumpur. The group then traveled to Sabah, Malaysia on the fourth through the sixth. On Feb 7, the woman was admitted to hospital and later transferred to another medical facility in Sabah. The patient is currently in stable condition.

It was later confirmed that the woman, prior to traveling to Malaysia, was treated at a clinic on Jan 30 for symptoms of fever, cough, flu, fatigue and joint pain. It was believed that the onset of further symptoms in Malaysia was a result of exposure that occurred before the dates of travel.

Malaysia’s MOH is conducting an investigation into the matter. It said it is coordinating information sharing with the Chinese Government.

Apart from the single Malaysian case, the WHO has received continuing reports, almost daily, from China’s National Health and Family Planning Commission (NHFPC).

Since the beginning of February, a total of 89 cases of H7N9 have been laboratory-confirmed from China; add that to the 120 cases reported in January and the total number of cases reported in 2013 and case counts now stand at 357, according to FluTrackers.com.

In mainland China, case totals of human infection from H7N9 stand at 347. Breaking the infections down by province, by far the most cases have been confirmed from Zhejiang, with 135 cases. Guangdong has seen 69 cases, Shanghai and Jiangsu have both seen 41 cases, Fujian has confirmed 20 cases and Hunan has had 12 cases. Anhui, Jiangxi, Beijing, Henan, Guangxi, Shandong, Guizhou and Hebei have all reported less than 10 cases.

A spokesman for China’s Center for Health Protection (CHP) said on Sunday that close surveillance, health measures and health education relating to the H7N9 outbreak are ongoing and that the country will remain vigilant and maintain communications with the WHO and other health authorities. The spokesman added that surveillance practices will be modified upon the WHO’s recommendations.

“In view of human cases of avian influenza A(H7N9) confirmed in Hong Kong and multiple cases notified by the Mainland, the activity of the virus is expected to be higher in the winter season. Those planning to travel outside Hong Kong should maintain good personal, environmental and food hygiene at all times,” the spokesman urged.

“All boundary control points have implemented disease prevention and control measures. Thermal imaging systems are in place for body temperature checks of inbound travellers. Random temperature checks by handheld devices have also been arranged. Suspected cases will be immediately referred to public hospitals for follow-up investigation,” the spokesman added.

The spokesman advised travelers, especially those returning from H7N9-infected regions, to immediately wear masks, seek medical attention and reveal travel history to their doctors. Healthcare professionals should pay close attention to their patients who may have had contact with live poultry in affected areas.

According to a CIDRAP report, Vietnam’s government is also stepping up efforts to prevent the spread of virus to its poultry. The country’s agriculture ministry met with officials on Feb 13 and subsequently announced a ban on all Chinese poultry. The ban came after officials voiced concerns that China’s Guangxi Province, which borders Vietnam to the north, had confirmed H7N9 infections.

Local officials have been ordered to boost surveillance and test all birds in poultry markets in Vietnam’s northern region, according to CIDRAP, citing a media report from Than Nien News.

The WHO does not currently advise any special screening practices at points of entry with regard to H7N9, nor does it currently recommend any travel or trade restrictions.

Record Number Of US Babies Born Using IVF Procedures

redOrbit Staff & Wire Reports – Your Universe Online

There were more test-tube babies born in the US in the year 2012 than ever before, and they represented the highest percentage of total infant births since the advent of in vitro fertilization (IVF) technology three decades ago, according to the annual report of the Society for Assisted Reproductive Technology (SART).

The SART report, which was released on Monday, said that there were a record 61,740 American babies born through the IVF process, in which eggs and sperm are mixed together under laboratory conditions.

That figure represents an increase of 2,000 so-called test tube births over the previous year, and represents 1.5 percent of all infants born nationwide, according to a story appearing in Monday’s edition of the Daily Mail.

Furthermore, the 379 infertility clinics that comprise the medical organization (which represent more than 90 percent of such facilities in the US) told Reuters that they performed 165,172 IVF procedures during the 2012 calendar year.

“The growing percentage reflects, in part, the increasing average age at which women give birth for the first time, since fertility problems become more common as people age,” the news organization explained. “The average age of first-time mothers is now about 26 years; it was 21.4 years in 1970.”

While the increasing number of children born through IVF would suggest that the process has gained mainstream acceptance, author and health/human rights advocate Miriam Zoll pointed out that the statistics – particularly when it comes to the success rate of test-tube babies – hide what she calls vast disparities.

“It’s important for people to understand that women over 35 have the highest percentage of failures,” Zoll, who in 2013 wrote the book Cracked Open: Liberty, Fertility and the Pursuit of High Tech Babies, told Reuters. She added that IVF births had “consistently failed two-thirds of the time” since the first procedure was completed in 1978.

According to the Daily Mail, the SART report also found that the number of IVF twin and triplet births were down. This was because infertility clinics transferred fewer embryos per cycle in 2012 than they had in 2011 – a result of criticism the industry faced over the practice of transferring multiple embryos to increase the odds of becoming pregnant.

Earlier this month, a team of American and Belgian researchers writing in the journal Reproductive BioMedicine Online described a novel method that had already resulted in the birth of sixteen healthy infants.

“This system reproducibly generates de novo the atmospheric and culture conditions that support normal fertilization and preimplantation embryogenesis to the hatched blastocyst stage without the need for specialized medical-grade gases or equipment,” the study authors wrote.

“Development from insemination to the hatched blastocyst stage occurs undisturbed in a completely closed system that enables timed performance assessments for embryo selection” involving “single-embryo transfers,” they added. The procedure could ultimately make IVF less expensive and available to more people worldwide.

Grocery Store Experience Enhanced With Philips’ Intelligent Lighting

[ Watch the Video: Grocery Shopping With Intelligent Lighting ]
Lee Rannals for redOrbit.com – Your Universe Online
Philips is continuing to revolutionize the lighting industry through its intelligent lighting system by adding new features that makes it useful for grocery stores.
Philips said on Monday that its new intelligent lighting system “gives new meaning to personalized shopping.”
“The system uses intelligent LED in-store lighting to communicate location-based information to shoppers via a smartphone app which they can opt to download. The lighting communicates with the app to send special offers and information to the shopper, relevant to their location in the store,” Philips said in a statement.
The system will give shoppers more personal control essentially by using the lighting fixtures as a dense network to provide a grid of information. Each of the fixtures is able to communicate its position to an app on a shopper’s smartphone, enabling the customer to get information related to their position in the store as they move around.
Philips’ system uses what is called visual light communications (VLC), turning the LEDs into a port for data transfer. LEDs are able to turn on and off at such fast rates that the human eye cannot even see the flickering. This allows for information to pass in one direction, from light to phone. The smartphones would have to be able to “see” the light in order for the VLC to work.
For example, shoppers wanting to make some guacamole for dinner will be able to use an app on their device to locate the ingredients in the aisle. The system will help plot out the route through the grocery store to help pick out the avocados, tomatoes, onions, chilies and limes. The app will also offer up advertisements and coupons for shoppers, or make some suggestions for additional recipes.
“The beauty of the system is that retailers do not have to invest in additional infrastructure to house, power and support location beacons for indoor positioning,” Gerben van der Lugt from Philips Lighting, said in a statement. “The light fixtures themselves can communicate this information by virtue of their presence everywhere in the store.”
Philips says that its system is being piloted with an unspecified number of retailers, but the company hasn’t detailed when it will be launching the system on a wide scale.
Image 2 (Below): Infographic of new lighting system. Credit: Philips

New Project Aims To Offer Free Global WiFi Service From Outer Space

[ Watch the Video: Outernet Would Provide Wi-Fi From Space ]

Lee Rannals for redOrbit.com – Your Universe Online

A project being incubated by the Media Development Investment Fund (MDIF) has ambitious plans to beam WiFi to everyone on the planet for free.

The organizations says that it is planning a project called “Outernet,” which will utilize a satellite constellation to make Internet universally-accessible and for no cost.

Outernet says on its site that there are more computing devices in the world than people, but only 60 percent of the world has access to the Internet.

“The price of smartphones and tablets is dropping year after year, but the price of data in many parts of the world continues to be unaffordable for the majority of global citizens. In some places, such as rural areas and remote regions, cell towers and Internet cables simply don’t exist,” Outernet says on its site. “The primary objective of the Outernet is to bridge the global information divide.”

The organization says that giving access to the knowledge the Internet has to offer is a human right, so it is guaranteeing this right by taking a practical approach to information delivery. The plan is to transmit a signal to mobile devices, antennae and satellite dishes, allowing people to access basic levels of new, information, education and entertainment.

Essentially the beginning of the project will see to it that these devices will be able to access some of this basic information for free. Eventually, Outernet says it will be providing two-way Internet access for free, meaning not only will it be allowing everyone to download this useful data, but they will be able to use this global WiFi service to upload things as well.

Outernet will consist of hundreds of low-cost, miniature satellites in Low Earth Orbit, each of which will be receiving data streams from a network of ground stations. These satellites will be transmitting the data in a continuous loop until new content is received.

The organization said that its entire constellation will be using globally-accepted standards-based protocols like DVB, Digital Radio Mondiale, and UDP-based WiFi multicasting.

“Citizens from all over the world, through SMS and feature-phone apps, participate in building the information priority list,” the organization wrote. “Users of Outernet’s website also make suggestions for content to broadcast; lack of an Internet connection should not prevent anyone from learning about current events, trending topics, and innovative ideas.”

In June, the organization plans to develop prototype satellites and test out a long range of WiFi multicasting. A few months later Outernet will begin transmission testing in flight-like environments. The launch and testing of constellation operations is expected to begin by next January.

Outernet is asking for contributions to the project of any size, which will all be 100 percent tax-deductible.

Image 2 (Below): Outernet

Colder US Winters Due To Shifting Polar Jet Stream: Study

[ Watch the Video: Blame The Jet Stream On Colder Winters ]

Brett Smith for redOrbit.com – Your Universe Online

Global warming skeptics have pointed to the unusually cold winter in parts of the United States this year as evidence against climate change.

However, a new study from Rutgers University indicates that the unusually chilly temperatures in the Midwest and southeastern US are consistent with projections of permanent shifts in weather patterns caused by rising temperatures.

According to the study, which was presented on Saturday at a meeting of the American Association for the Advancement of Science (AAAS) in Chicago, the high-altitude polar jet stream is slowing down and driving cold polar air to the south as a result.

The jet stream is created when cold Arctic air meets warmer air moving north from temperate latitudes and is driven by this temperature contrast. Study researcher Jennifer Francis, a climate expert at Rutgers, said the recent warming of Arctic air means there is now less of a difference in temperatures when polar air hits air from lower latitudes.

While the contiguous United States is currently going through an especially bitter winter, Alaska and other northern areas are currently going through an unusually warm winter.

This indicates “that weather patterns are changing,” Francis told the AFP. “We can expect more of the same and we can expect it to happen more frequently.”

Average Arctic temperatures have been rising “two to three times faster than the rest of the planet,” said James Overland, a weather expert with the National Oceanic and Atmospheric Administration (NOAA).

Francis said it may be too early to point the finger directly at human activities for this change.

“Our data to look at this effect is very short and so it is hard to get very clear signal,” she said. “But as we have more data I do think we will start to see the influence of climate change.”

Like most theories involving climate change, this shift in the activity of the jet stream is a controversial idea.

“There is evidence for and against it,” said Mark Serreze, director of the National Snowland Ice Data Center in Boulder, Colorado.

However, Serreze did admit that rising Arctic temperatures are linked to melting ice caps, which in turn leads to additional warming.

“The sea ice cover acts as a lid which separates the ocean from a colder atmosphere,” Serreze told the scientific conference. When that lid is removed, warmth contained in the water rises into the polar atmosphere.

“We are going to see changes in patterns of precipitation, of temperatures that might be linked to what is going on in the far north,” Serreze said.

Jerry Hatfield, head of the National Laboratory for Agriculture and Environment, warned that significant changes in weather affects many nations besides the United States.

“Look around the world — we produce the bulk of our crops around this mid-latitude area,” he said.

Agriculture is most affected by extreme weather patterns, which are largely driven by the activity of the jet stream.

Both droughts and freezes are already having “a major impact on animal productivity, it influences meat production, milk and eggs production,” Hatfield added.

Spiked Heroin Blamed For Rash Of Deaths

Brett Smith for redOrbit.com – Your Universe Online

Federal official are blaming a deadly combination of heroin and the powerful narcotic fentanyl for over 80 deaths around the United States in recent weeks. Often used as an anesthetic, fentanyl is typically administered in hospitals to people in end-of-life care, such as terminal cancer patients.

Dr. Karl Williams, the chief medical examiner in Pennsylvania’s Allegheny County, told ABC News in January that recent trends represent a “major increase in drug overdoses,” and added that the appearance of a powdered form of the drug means that it “has to be made by somebody… somewhere in a clandestine laboratory.”

“This is not accidental,” he said “Somebody is deliberately trying to make a big batch of fentanyl. It is not an extraordinarily complex molecule to synthesize, and you can find instructions on the Internet. It does not take a sophisticated chemist to do this.”

Among the recent victims of the deadly cocktail are 22 Pennsylvania residents from six different counties. If fentanyl is mixed with cocaine or heroin, it amplifies their strength, and can result in respiratory, sedation and nausea problems, officials said. They added that the illicit combination of drugs are popping up in small bags marked with popular brands, such as Theraflu, Bud Ice and Income Tax.

“A lot of those people thought that Bud Light was really hot, it’s really good stuff, it sends you over the edge,” said Joseph Coronato, a prosecutor in Ocean County, N.J. told the Daily Mail. “It’s a marketing tool, almost.”

Ocean County is another part of the country that has been severely impacted by heroin and prescription drug overdoses over the last two years. In 2012, the coastal county saw 53 overdoses and in 2013 there were 112 reported.

“The demand is so high. That’s the problem that’s out there,” Coronato said.

“A very small amount can exert a very significant effect,” warned Dr. Eric Strain, director of the Center for Substance Abuse Treatment and Research at Johns Hopkins University.

“The dealers push this as being a super high, which it is, but it’s also lethal,” added Ellen Unterwald, director of the Center for Substance Abuse Research at Temple University.

Last week, the Journal of Substance Abuse Treatment published an analysis of data on mortality risks of users of cocaine and heroin. The study revealed that users of those drugs are at a 14-times higher risk of fatality, compared to the general population.

Among heroin users in the study, men were also 1.5 times more likely to die than women. Some of the specific risk factors in the study included mental disorders, personality traits, and social conditions surrounding drug dependence.

“This research clearly shows that drug use is unsafe and can lead to fatality. Addiction is often associated with underlying psychological disorders,” said Pax Prentiss, CEO of Passages Addiction Treatment Centers. “For individuals who have made the choice to end their dependence on substances, our treatment team has helped our clients to return to their daily lives, drug and alcohol free.”

The ‘Dark Tetrad’ Makes Up The World Of The Internet Troll

[ Watch the Video: The Psychology Behind Internet Trolls ]
Lawrence LeBlond for redOrbit.com – Your Universe Online
Look almost anywhere on the Internet and you will likely find negative comments related to whatever content is featured on a webpage. Be it images, video, a news story or a blog, people just love to share their negative feedback. Now, a new study from Canadian psychologists has gone a step beyond the realms of sanity and delved deeper into the mind of the Internet troll.
Erin Buckels, of the University of Manitoba, published a new paper titled “Trolls Just Want To Have Fun” in the journal Personality and Individual Differences. Buckels sought to directly investigate whether people who engage in online trolling are characterized by personality traits that fall under the so-called “Dark Tetrad.” These four traits include Machiavellianism (willingness to manipulate or deceive), narcissism, psychopathy and sadism.
Buckels, along with Paul Trapnell, of the University of Winnipeg, and Delroy Paulhus, of the University of British Columbia, set up a survey of personality inventories matched with “Internet commenting styles” to determine what traits Internet trolls fall under. In essence, the team was trying to psychoanalyze the commenters, reports Kyle Chayka of TIME.
What is likely to be of no surprise to anyone, the study determined that people who like to troll are the most likely to show signs of “sadism, psychopathy, and Machiavellianism.”
While the findings make a connection between Internet trolling and these dark traits, it is not known if trolling most always occurs in sadists and psychopaths, or if the Internet has a tendency to turn people into these horrible creatures. Interestingly, the Internet does provide a certain level of anonymity, which helps trolls remain secretive, perhaps allowing sadism to shine more brightly in comments sections across the World Wide Web.
The team did note that not all negative commenters fall into the “Dark Tetrad.” The team did conclude that some online activities, such as chatting and debating, was unrelated to sadism. However, most people who use the Internet have had some run-in with trolls in some way or another. If you haven’t, then consider yourself one of the fortunate ones.
For the study, the team used a variety of tools to tease out the trolls. A simple survey asking participants what they “enjoyed doing most” when using comments sections, offered them five choices: “debating issues that are important to you,” “chatting with others,” “making new friends,” “trolling others,” and “other.”
Interestingly, the team found that only 5.6 percent of the survey respondents specified that they enjoyed “trolling.” A much larger 41.3 percent of participants said they did not use comment sections, meaning they did not like engaging online at all.
The results do confirm one theory – the fact that trolls are among the minority of online commenters and an even smaller minority of Internet users, according to Chris Mooney of Slate.
However, the fact that this subset of people is in the minority does not help bring solace to the larger Internet audience.
Many sites, including news and media outlets, have taken broad measures to help rein in Internet troll behaviors. Popular Science recently closed its comments section to rid its world of sadism and psychopathy. As well, YouTube has taken some measures to try to lessen comment negativity.
Buckels, however, doesn’t feel that this is a surefire way to fix the problem of trolling.
“Because the behaviors are intrinsically motivating for sadists, comment moderators will likely have a difficult time curbing trolling with punishments (e.g., banning users),” She told Slate via email. “Ultimately, the allure of trolling may be too strong for sadists, who presumably have limited opportunities to express their sadistic interests in a socially-desirable manner.”