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Latest Electrical phenomena Stories

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2011-04-07 13:35:00

Scientists have calculated that the Earth sees about 760 thunderstorms every hour. The figure is substantially lower than numbers that have been used for nearly a century. The new research, which was unveiled at a recent European Geosciences Union meeting, uses a global network of monitoring stations that detect the electromagnetic pulses produced by major bolts of lightning. The scientists confirmed that thunderstorms are mainly a tropical phenomenon, and the Congo basin is the global...

2011-03-15 20:28:48

Engineering researchers at the University of Michigan have found a way to improve the performance of ferroelectric materials, which have the potential to make memory devices with more storage capacity than magnetic hard drives and faster write speed and longer lifetimes than flash memory. In ferroelectric memory the direction of molecules' electrical polarization serves as a 0 or a 1 bit. An electric field is used to flip the polarization, which is how data is stored. With his colleagues at...

2011-03-11 15:51:29

The droning of a car driving along the highway can be nerve-racking. Often, a driver cannot understand the passengers in the rear seat, not to mention the pianissimo on the car stereo. Actually, though, there are ways to drive this disruptive vibration out of the car. This is possible thanks to "smart materials" "“ intelligent materials that can tailor their own condition to changing situations with highest speed. The possible applications are diverse and promising "“ not just for...

2011-03-09 16:28:00

Rutgers researchers have identified a class of high-strength metal alloys that show potential to make springs, sensors and switches smaller and more responsive. The alloys could be used in springier blood vessel stents, sensitive microphones, powerful loudspeakers, and components that boost the performance of medical imaging equipment, security systems and clean-burning gasoline and diesel engines. While these nanostructured metal alloys are not new "“ they are used in turbine blades...

2011-02-22 12:30:00

NEW YORK, Feb. 22, 2011 /PRNewswire/ -- TBT Group Inc. will present at CleanEquity Monaco 2011; the conference is on March 3rd & 4th at the Sporting d'Hiver, Monaco. (Logo: http://photos.prnewswire.com/prnh/20110214/CL47472LOGO ) TBT Group Inc. was included, by expert selection, as one of the world's most inspiring cleantech companies, to present to industry-specific, senior financial and strategic investors, policy makers, legislators, end users and media. TBT is an innovative...

95ecac4f8d94cebb12ad897386f4406b
2011-02-02 21:46:52

Auroras, more commonly known as the northern and southern lights, are one of the most beautiful and awe-inspiring natural phenomena. New insights into the processes that generate Earth's auroras (and those of other planets) are now being provided by a flotilla of ESA satellites, known as the Cluster mission, as they sweep through the region of space where these colorful curtains of light are created. As they fly in formation above the planet's poles, the Cluster spacecraft are gathering the...

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2011-02-01 14:15:00

ESA's Cluster satellites have flown through a natural particle accelerator just above Earth's atmosphere. The data they collected are unlocking how most of the dramatic displays of the northern and southern lights are generated. Two of Cluster's four satellites found themselves in a natural particle accelerator above the northern hemisphere on 5 June 2009. The first to cross was satellite C3 at an altitude of 6400 km, followed five minutes later by C1 at 9000 km. This is the first time that...

2011-01-26 12:58:07

Gallium nitride (GaN) and zinc oxide (ZnO) are among the most technologically relevant semiconducting materials. Gallium nitride is ubiquitous today in optoelectronic elements such as blue lasers (hence the blue-ray disc) and light-emitting-diodes (LEDs); zinc oxide also finds many uses in optoelectronics and sensors. In the past few years, though, nanostructures made of these materials have shown a plethora of potential functionalities, ranging from single-nanowire lasers and LEDs to more...

2de5798259f7d534617f41ec940fab3c1
2010-12-10 13:30:00

The eruption of the Icelandic volcano Eyjafjallajökull in April this year resulted in a giant ash cloud, which "“ at one point covering most of Europe "“ brought international aviation to a temporary standstill, resulting in travel chaos for tens of thousands. New research, published December 10, in IOP Publishing's Environmental Research Letters, shows that lightning could be used as part of an integrated approach to estimate volcanic plume properties. The scientists found...

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2010-12-01 11:25:00

Australian astrophysicist Stephen Hughes said that some UFO sightings could be explained by ball lightning and other atmospheric phenomena, according to a recent BBC News report. The scientists made a detailed study of an unusual event that took place in 2006 when large meteors were observed over Brisbane.  During the same time, another unidentified green object was seen to roll over nearby mountains. Hughes has theorized that the object was actually ball lightning. He believes that...


Latest Electrical phenomena Reference Libraries

Weather Reference Library
2012-05-10 10:05:27

When we think of thunderstorms we have to remember the deadliest part of those storms and that is the lightning that occurs with them. Lightning is found in many forms. The first type of lightning is known as cloud to cloud meaning that the electric charge travels from one cloud to the other. The second type of lightning is the Cloud to Air meaning the lighting moves from the cloud and enters the clear air of the sky. A third type of lightning is the cloud to ground. This is the most...

45_0a648573510fd624b654781c72234be7
2009-07-21 16:45:53

A Radio Atmospheric signal (sometimes referred to as Sferic or Spheric), is a broadband electromagnetic impulse that occurs during atmospheric lightning discharges. Sferics spread out from the lightning source and can be received thousands of miles away. A sferic, depending on atmospheric conditions, may extend anywhere from a few kHz to several tens of kHz. Sferics from far reaching storms, over 1500 miles away, are generally offset in frequency range and may be picked up as tweeks. A...

45_ea2454244dfc08fbf5cc825f9559f1da
2009-07-21 16:27:18

Heat Lightning is actually faint flashes of lightning reflecting outward from distant thunderstorms. These flashes usually do not produce thunder as the storm is sometimes too far away to be heard. The term heat lightning got its name because it often occurs on hot summer nights and does not produce audible thunder. One reason heat lightning can be seen so far away is due to the reflection of the light bouncing off water particles in moist, humid air and as light is scattered throughout the...

6_7a298dad9db3084ba8f1dbe9ba6be2442
2004-10-19 04:45:41

Aurora -- The Polar Aurora are natural displays of light in the sky that can be seen with the unaided eye only at night. An auroral display in the Northern Hemisphere is called the aurora borealis, or the northern lights; in the Southern Hemisphere it is called the aurora australis. Auroras are the most visible effect of the sun's activity on the earth's atmosphere. The beautiful and often eerie curtains of light in the night time sky have been observed by people for millennia. An aurora...

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Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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