Transport of alkali metal atoms through porous cathodes of alkali metal thermal-to-electric converter (AMTEC) cells is responsible for significant, reducible losses in the electrical performance of these cells. Experimental evidence for activated transport of metal atoms at grain surfaces and boundaries within some AMTEC electrodes has been derived from temperature dependent studies as well as from analysis of the detailed frequency dependence of ac impedance results for other electrodes, including thin, mature molybdenum electrodes which exhibit transport dominated by free molecular flow of sodium gas at low frequencies or dc conditions. Activated surface transport will almost always exist in parallel with free molecular flow transport, and the process of alkali atom adsorption/desorption from the electrode surface will invariably be part of the transport process, and possibly a dominant part in some cases. Little can be learned about the detailed mass transport process from the ac impedance or current voltage curves of an electrode at one set of operating parameters, because the transport process includes a number of important physical parameters that are not all uniquely determined by one experiment. The temperature dependence of diffusion coefficient of the alkali metal through the electrode in several cases provides an activation energy and …

Periodic newsletter discussing information related to legislation, state finance, and other topics related to Texas government. This issue focuses on the diversification of the Texas economy throughout the 1980s.

Annual statistical report suggesting benchmarks for school budgeting based on financial, personnel, and taxing information submitted by local school districts to state agencies.

Periodic bulletin discussing information related to legislation, state finance, and other topics related to budgeting in Texas agencies. This issue focuses on the share of the state budget spent on managing the prison populations.

Semiannual report providing an overview of statistics related to crime in Texas organized into summary tables and graphs for specific types of crimes from January to June 1992.

The overall objective of the Direct Conversion Technology task is to develop an experimentally verified technology base for promising direct conversion systems that have potential application for energy conservation in the end-use sectors. Initially, two systems were selected for exploratory research and advanced development. These are Alkali Metal Thermal-to-Electric Converter (AMTEC) and Two-Phase Liquid Metal MD Generator (LMMHD). This report describes progress that has been made during the first six months of 1992 on research activities associated with these two systems. (GHH)

The overall objective of the Direct Conversion Technology task is to develop an experimentally verified technology base for promising direct conversion systems that have potential application for energy conservation in the end-use sectors. Initially, two systems were selected for exploratory research and advanced development. These are Alkali Metal Thermal-to-Electric Converter (AMTEC) and Two-Phase Liquid Metal MD Generator (LMMHD). This report describes progress that has been made during the first six months of 1992 on research activities associated with these two systems. (GHH)

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Special edition of the Texas Planning Council for Developmental Disabilities newsletter containing information about community living, employment, and education.

Bimonthly newsletter of the Texas Planning Council for Developmental Disabilities including information about the Council as well as news, events, and other relevant information.

Monthly compilation of estimated statistics listed by Texas county for civilian labor force (C.L.F.), employment, unemployment, and overall rate.

Newsletter of the Lee College continuing education program for senior citizens discussing news and events, announcements related to the program, and other information of interest to participants.

Quarterly newsletter from the University of Texas System Cancer Center, M.D. Anderson Hospital and Tumor Institute discussing cancer care and research to inform physicians of recent developments in the field.

The Estes Gulch disposal site is approximately 10 kilometers (6 miles) north of the town of Rifle, off State Highway 13 on Federal land administered by the Bureau of Land Management. The Department of Energy (DOE) will transport the residual radioactive materials (RRM) by truck to the Estes Gulch disposal site via State Highway 13 and place it in a partially below-grade disposal cell. The RRM will be covered by an earthen radon barrier, frost protection layers, and a rock erosion protection layer. A toe ditch and other features will also be constructed to control erosion at the disposal site. After removal of the RRM and disposal at the Estes Gulch site, the disturbed areas at all three sites will be backfilled with clean soils, contoured to facilitate surface drainage, and revegetated. Wetlands areas destroyed at the former Rifle processing sites will be compensated for by the incorporation of now wetlands into the revegetation plan at the New Rifle site. The UMTRA Project Office, supported by the Remedial Action Contractor (RAC) and the Technical Assistance Contractor (TAC), oversees the implementation of the MAP. The RAC executes mitigation measures in the field. The TAC provides monitoring of the mitigation actions in …

This report provides information on the project to reevaluate the Texas Water Development Board's existing Edwards aquifer flow model and refine the simulation of water levels and springflows in the San Antonio region.

Monthly graphic bulletin issued by the U.S. Army regarding preventative maintenance policies and procedures to keep weapons and other military supplies in good repair.

Technical report that describes Section 1031 of the Internal Revenue Code (IRC), how it is used in real estate, and reviews the technique.

This short background paper summarizes the discussion concerning data pricing and distribution from a one-day workshop convened by OTA on May 20, 1992.

Technical report that provides guidelines for mortgage options, and definitions for each type of mortgage option.

This report examines the costs and benefits of vehicle retirement programs. With regulation of new vehicles above the 90 percent control level for the major pollutants and scheduled to become even stricter in the near future, emissions from older vehicles have drawn increasing attention.

The thermodynamic cycle appropriate to an AMTEC (alkali metal thermal-to-electric converter) cell is discussed for both liquid- and vapor-fed modes of operation, under the assumption that all processes can be performed reversibly. In the liquid-fed mode, the reversible efficiency is greater than 89.6% of Carnot efficiency for heat input and rejection temperatures (900--1300 K and 400--800 K, respectively) typical of practical devices. Vapor-fed cells can approach the efficiency of liquid-fed cells. Quantitative estimates confirm that the efficiency is insensitive to either the work required to pressurize the sodium liquid or the details of the state changes associated with cooling the low pressure sodium gas to the heat rejection temperature. 10 refs.

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.

Monthly report providing tabular statistical information about motor vehicle accidents in rural areas of Texas during 1992, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.