Learn More
Exposure of workers to dinitrotoluene (DNT) was evaluated at a DNT manufacturing plant. Urine was collected over 72 hours; work diaries were prepared dialy; breathing zone air was sampled; and skin and environmental surfaces were wiped. Chemical analysis was performed using gas chromatography or gas chromatography/mass spectrometry. Proportions of urinary(More)
This paper systematically and generally addresses the question of when a single-layer winding can have lower loss than a multi-layer winding. Two cases for single-layer windings are investigated. First, when very high frequencies require thinner conductor layers or thinner wire than is practical. Second, when the current waveform contains substantial(More)
This paper presents a concept for metric-aware dynamic fidelity modeling (MADFM), a simulation framework capable of intelligently applying fidelity consistent with analysis goals. (Fidelity refers to the accuracy of a simulated representation when compared to the real world.) As part of efforts to develop this concept, JHU/APL has designed and implemented a(More)
Single-layer and multi-layer transformer and inductor windings are compared. Multi-layer windings (including litz wire) can typically achieve lower loss, but several situations that may favor single-layer windings are discussed. As shown in previous work, for sinusoidal waveforms, if the minimum practical layer thickness is 1.5 skin depths or greater,(More)
  • 1