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More Energy with Less Weight

May 18th, 2011|Categories: Energy, News, Renewable Energy, Wind Energy|Tags: , , , |

The following is from an article published in WindStats Newsletter Vol. 19, No. 4. The complete article is available from WindStats at: "It comes as no surprise that much of today's wind power research focuses on increasing blade lengths. The weight of a rotor can take up as much as 77% of the total weight of a system, says John Locke, a researcher at Wichita State University's National Institute for Aviation Research. Yet, according [...]

InAs Quantum Dot Transitions

April 5th, 2011|Categories: EC, Energy, Energy Efficiency, News, Solid-State Lighting|Tags: , , , , , , |

March 1, 2011[singlepic id=364 w=320 h=240 float=right] The fundamental interaction governing light emission from semiconductor materials is the coupling between electronic states in the semiconductor and a local electromagnetic field. The current generation of solid-state lighting devices operates in the so-called “weak-coupling” regime, in which the rate of energy transfer between the electronic states and the local electromagnetic field is lower than the rates at which these states or fields relax. For a possible future [...]