Environmental groups trying to stop the unintentional transfer of invasive species from foreign bodies of water into U.S. waterways have won a shot at tougher regulations with a decision by the U.S.

The 9th Circuit Court of Appeals on Wednesday ruled in favor of environmental groups pushing the U.S. Environmental Protection Agency to regulate ship ballast discharges under the Clean Water Act. The ...

The electronic ballast circuit block diagram (see Fig. 1) includes the ac-line input voltage (typically 220 Vac/50 Hz or 120 Vac/60 Hz), an EMI filter to block circuit generated switching noise, a ...

Resonant-mode topologies offer many benefits over traditional buck, boost, and flyback solutions. These include soft-switching, higher operating frequencies, higher power density, and higher ...

Engineers from PureSpectrum have developed an electronic ballast circuit design that enables compact fluorescent lamps to be fully dimmable using a standard dimming device. Engineers from PureSpectrum ...

Fluorescent dimming systems can satisfy visual comfort, and reduce utility costs through daylight harvesting, demand reduction, scheduled dimming, and other strategies. A dimming electronic ballast is ...

In a sharply divided split decision, the US Federal Circuit has upheld the longstanding rule that claim construction in patent appeals is reviewed using the de novo standard In a dispute that now ...