Thermionic energy converters

The efficiency of thermionic energy converters is improved by internal distribution of tiny sorted cesium diodes driven by the thermal gradient between the primary emitter and the collector. The tiny, sorted diode distribution comprises protrusions of the emitter material from the main emitter face which contact the main collector face thermally but not electrically. The main collector ends of the protrusions are separated from the main collector by a thin layer of insulation, such as aluminum oxide. The shorted tiny diode distribution augments cesium ionization through internal thermal effects only within the main diode. No electrical inputs are required. This ionization enhancement by the distribution of the tiny shorted diodes not only reduces the plasma voltage drop but also increases the power output and efficiency of the overall thermionic energy converter

Entrepreneurship as social policy: A case study of the United Arab Emirates

While many different types of entrepreneurship have been identified in the literature, each type shares one feature in common – the profit motive. Entrepreneurship is generally seen as contributing to the economic development of a country. However, it will be argued that entrepreneurship can be used for social policy, with economic policy a secondary issue. The discussion uses the United Arab Emirates as an example of the potential use of entrepreneurship as social policy

Binary alloys for refractory-metal brazing

Data on binary-metal eutectics and melting-point minimums have been assembled for use in selecting brazing filler compositions for refractory metals. Data are presented in four tables for ready reference. Brief discussion of problems and potentials of metallides is included in appendix

The Blue Eagle At Work: Reclaiming Democratic Rights in the American Workplace

Charles J. Morris, a renowned labor law scholar and preeminent authority on the National Labor Relations Act, uncovers a long-forgotten feature of that act that offers an exciting new approach to the revitalization of the American labor movement and the institution of collective bargaining. He convincingly demonstrates that in private-sector nonunion workplaces, the Act guarantees that employees have a viable right to engage in collective bargaining through a minority union on a members-only basis. As a result of this startling breakthrough, American labor relations may never again be the same

High thermal power density heat transfer apparatus providing electrical isolation at high temperature using heat pipes

This invention is directed to transferring heat from an extremely high temperature source to an electrically isolated lower temperature receiver. The invention is particularly concerned with supplying thermal power to a thermionic converter from a nuclear reactor with electric isolation. Heat from a high temperature heat pipe is transferred through a vacuum or a gap filled with electrically nonconducting gas to a cooler heat pipe. If the receiver requires gratr thermal power density, geometries are used with larger heat pipe areas for transmitting and receiving energy than the area for conducting the heat to the thermionic converter. In this way the heat pipe capability for increasing thermal power densities compensates for the comparative low thermal power densities through the electrically nonconducting gap between the two heat pipes