George Roscoe

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The distribution and quantitation of T-lymphocyte subpopulations of human tonsils were studied in situ by the avidinbiotin-peroxidase technique, using monoclonal antibodies to total, helper, and suppressor T cells. Primary follicles contained few T lymphocytes. The germinal centers of secondary follicles contained numerous T cells: in the periphery, 14.2%(More)
IEEE 1584, “Guide for Performing Arc-Flash Incident Energy Calculations,” provides a method to conservatively predict the incident energy let-through by over-current devices based on the device's time-current curve or tested transfer functions. Additional testing by various manufacturers has shown that current-limiting (CL) circuit breakers(More)
The predominant technologies for reducing arc-flash incident energy today rely on the speed of protective devices, remote operation, encapsulating arc-flash energy in arc-resistant enclosures, which channel energy where it is less dangerous, and on crowbars to divert the arc energy into a bolted fault. Though more thoughtfully applied than they may have(More)
Arc-flash protection systems have evolved over the past decade with a range of solutions from arc-resistant gear to circuit breaker temporary instantaneous settings. One technology that has gained acceptance, especially in medium voltage applications is light sensing as applied in arc-flash relays. Recently, arc flash relays have moved into low voltage(More)
Tests on the arc-containment device have confirmed that fast energy capture by transferring an arcing current from an open-air arc to an enclosed, controlled chamber provides a high degree of protection to LV switchgear. Tests confirmed the ability of the device to perform within the requirements of applicable IEEE standards for LV and arc resistant(More)
Treatment of extensive carcinoma of the external nose has as an objective the eradication of disease and rehabilitation of the patient. We review our experience with 15 patients treated with total and subtotal rhinectomy. Prosthetic rehabilitation offers prompt recovery of both cosmesis and function without morbidity. We conclude that prosthetic(More)
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