A light emitting diode (LED) is an III-V semiconductor device that can convert electrical energy into visible light, a phenomenon called electroluminescence (EL). In recent years, labs have been fine-tuning this device to the point now that it is used with ever more frequency in the manufacture of auto lamps.

Global wind power capacity reached 94,100 megawatts by the end of 2007, up 27 percent from the previous year, and then topped 100,000 megawatts by April 2008.1 (See Figure 1.) The roughly 20,000 megawatts installed in 2007 was 31 percent above the 2006 record for capacity additions.2 (See Figure 2.) New wind installa­tions were second only to natural gas in the United States as an additional source of power capacity and were the leading source of new capacity in the European Union (EU).3

WASHINGTON (April 23, 2008) - An investigation of the Environmental Protection Agency released today found that 889 of nearly 1,600 staff scientists reported that they experienced political interference in their work over the last five years. The study, by the Union of Concerned Scientists (UCS), follows previous UCS investigations of the Food and Drug Administration, Fish and Wildlife Service, National Oceanic and Atmospheric Administration, and climate scientists at seven federal agencies, which also found significant administration manipulation of federal science.

Demonstration Projects Aim at 15 Percent Reduction of U.S. Peak Load Electricity Demand Washington, DC- U.S. Department of Energy (DOE) Assistant Secretary for Electricity Delivery and Energy Reliability Kevin Kolevar today announced the Department's plans to invest up to $50 million over five years (Fiscal Years 2008 - 2012), subject to appropriations from Congress, in nine demonstration projects competitively selected to increase efficiency in the nation's electricity grid.

HYDERABAD: Now, you can spin the yarn, and through that, listen to the radio and do some reading as well. This is thanks to rural development minister G Chinna Reddy on Friday launching e-charka, an electric improvisation over what was made famous by Mahatma Gandhi.