Cooperation: Toward a Revision of the Concept and its Application

Father Curran\u27s discussion revolves around the limitations imposed on the individual\u27s freedom to act according to the dictates of his conscience. He directs his attention primarily to the questions of sterilization, abortion and the cooperating physician. Father Curran is a professor of M oral Theology at the Catholic University of America

Assessing the Information Needs of Rural People: The Development of an Action Strategy for Rural Librarians

published or submitted for publicatio

Low power arcjet performance

An experimental investigation was performed to evaluate arc jet operation at low power. A standard, 1 kW, constricted arc jet was run using nozzles with three different constrictor diameters. Each nozzle was run over a range of current and mass flow rates to explore stability and performance in the low power engine. A standard pulse-width modulated power processor was modified to accommodate the high operating voltages required under certain conditions. Stable, reliable operation at power levels below 0.5 kW was obtained at efficiencies between 30 and 40 percent. The operating range was found to be somewhat dependent on constrictor geometry at low mass flow rates. Quasi-periodic voltage fluctuations were observed at the low power end of the operating envelope, The nozzle insert geometry was found to have little effect on the performance of the device. The observed performance levels show that specific impulse levels above 350 seconds can be obtained at the 0.5 kW power level