S Hummel

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Forest composition and structure on the eastern slope of the Cascade Mountains have been influenced by decades of fire exclusion. Multi-layered canopies and high numbers of shade-tolerant true fir trees interact with western spruce budworm to alter forest structure and to affect potential fire behavior and effects. We compared measurements taken in 1992(More)
Severe disturbances to other plant functions resulting from operation of a new all-electric glass melting furnace in a manufacturing plant are discussed. The problem was traced to the thyristor controllers which regulated power to melter electrodes. Investigation showed severe distortion of the plant feeder-voltage waveform due to harmonic currents.(More)
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