Abstract: This paper proposes LED current control method of dimmable LED driver with dual active bridge (DAB) DC-DC converter for 1kW-class LED floodlight. The LED current control method is discussed ...

Abstract: In single-phase ac/dc light-emitting diode (LED) drivers, a reduced power processing technique is currently being used to increase conversion efficiency while reducing the size and cost of ...

Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. The Republican co-authors of the latest effort to repeal and replace the ...

Image — A man walks by a vandalized mural depicting a group of women on 14 August 2022 in Kabul, Afghanistan. Photo by Nava Jamshidi/Getty Images. One year after the Taliban’s ascent to power in ...

Despite its name, the old Empire of Ghana is not geographically, ethnically, or in any other way, related to modern Ghana. It lies about four hundred miles north west of modern Ghana. Ancient Ghana ...