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Latest Electrical phenomena Stories

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2009-11-14 07:38:36

There is good news for the global effort to reduce the amount of lead in the environment and for the growing array of technologies that rely upon the piezoelectric effect. A lead-free alternative to the current crop of piezoelectric materials has been identified by researchers with the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC), Berkeley. The key to this success is the use of bismuth ferrite, a compound with a...

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2009-10-30 11:25:00

Every year, scientists learn something new about the inner workings of lightning. With satellites, they have discovered that more than 1.2 billion lightning flashes occur around the world every year. (Rwanda has the most flashes per square kilometer, while flashes are rare in polar regions.) Laboratory and field experiments have revealed that the core of some lightning bolts reaches 30,000 Kelvin (53,540 ºF), a temperature hot enough to instantly melt sand and break oxygen...

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2009-09-10 15:45:00

A freak bolt of lightning struck a 56-year-old cyclist in Englewood, Colo., even though no electrical storms were reported in the area, authorities say. Perry Schellpfeffer, an Englewood police spokesman, told The Denver Post the unidentified victim was hit by the lightning Wednesday afternoon. His injuries were not considered life-threatening. There were some clouds and it was thundering a little, but there wasn't any kind of lightning storm, Schellpfeffer said. Among U.S. states, Colorado...

2009-08-25 13:31:14

U.S. scientists say they've captured a one-second image and the electrical fingerprint of a gigantic lightning jet that flowed 40 miles upward from a storm. While not occurring every time a thunderstorm develops, the rarely seen, highly charged meteorological events can flash up to the lower levels of space, or the ionosphere, Duke University scientists said. They are substantially larger than their downward striking cousins. Despite poor viewing conditions as a result of a full moon and a...

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2009-08-24 12:45:00

Duke University researchers have captured images of lightning bolts shooting upwards. The rare phenomenon, known as "gigantic jets," was photographed during tropical storm Cristobal last year. The gigantic jets shot more than 40 miles high, Duke Professor Steven Cummer and colleagues wrote in the journal Nature Geoscience. "Despite poor viewing conditions as a result of a full moon and a hazy atmosphere, we were able to clearly capture the gigantic jet," said Cummer. "What we were able to...

2009-08-03 13:17:58

A 38-year-old bricklayer in the British town of Kettering says he is lucky to have survived being struck by lightning while walking his dogs. The Daily Mail Monday said Brad Gifford was hit by a 300,000-volt bolt of lightning while attempting to seek shelter from a thunderstorm by ducking under a tree. Gifford suffered burns to 11 percent of his body and both of his eardrums were burst. Nonetheless, he expressed relief at having survived the potentially deadly lightning strike, the newspaper...

2009-07-28 08:51:27

Much like humans, materials are capable of some pretty remarkable things when they're placed under pressure. In fact, under the right conditions, materials can even produce electricity.Driven by the vision of our society one day being basically self-propelled, a team of University of Houston scientists has set out to both amplify and provoke that potential in materials known as piezoelectrics, which naturally produce electricity when literally subjected to strain. The goal is to use...

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2009-07-23 08:08:15

In a Nature letter published July 23, 2009, Norwegian researchers present evidence that the auroras in the Northern and the Southern hemispheres can be totally asymmetric. These findings contradict the commonly made assumption of aurora being mirror images of each other. The study with the sensational results has been performed by PhD student Karl Magnus Laundal and professor Nikolai Østgaard at the Institute of Physics and Technology at the University of Bergen. The...

2009-06-22 14:04:17

U.S. government scientists say they have created a method of measuring the intrinsic conducting properties of ferroelectric materials. The researchers at the Center for Nanophase Materials Sciences at the U.S. Department of Energy's Oak Ridge National Laboratory in Tennessee say their achievement could lead to much smaller, faster and more powerful electronic devices. For years, the challenge has been to develop a nanoscale material that can act as a switch to store binary information, Peter...

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2009-06-22 13:01:31

Experts say 2009 already has been proved a dangerous year for lightning strikes in the United States and warn the worst may be yet to come. National Weather Service lightning expert John Jensenius said 11 people have been killed in the United States by lighning strikes just this month as the particularly dangerous summer months get under way, ABC News reported Monday. Last year was an exceptionally good year for not having fatalities. This year is starting out as an exceptionally bad year,...


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
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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