Report that provides information on the feasibility of vocational evaluation on disabled patients.

A report covering employer preferences in job applicants and areas of improvement for people preparing for full-time work.

Report summarizing the proceedings, suggestions, and issues raised at the State Forum on Technical-Vocational Education in 1975, to "provide guidance for continuous review of the planning and management of vocational education resources at the state level" (p. i).

Preliminary ''steam tables'' which contain the physical properties of vapor-saturated aqueous sodium chloride solution and the coexisting gas are given for liquid concentrations between 0 mol NaCl/kg H{sub 2{O and halite saturation at temperatures between 80{sup 0} and 325{sup 0}C. For the same conditions, the tables give the partial molal entropy, enthalpy, and volume of H{sub 2}O in the phases. The tables were calculated from parametric equations of state.

The conditions under which the heat associated with hydrothermal reactions may be recovered from a dry rock geothermal reservoir were assessed. A theoretical computer model, based upon the finite element method, of a two-dimensional fracture in a hot, dry rock geothermal reservoir was developed and tested. Simulated water circulation through the fracture at constant velocity extracted heat from the wall rock via conduction as well as from chemical processes. Water temperature was assumed equal to the temperature of the wall rock boundary: thus, the combined processes of water circulation and heat transport were simply described by the two-dimensional heat diffusion equation with a time dependent water circulation boundary. The accuracy of the basic finite element approximation was tested by comparing numerical solutions to known analytical solutions for related mathematical models. Hydrothermal reactions occurring between water and a granitic source rock were subdivided into two categories; dissolving reactions and alteration reactions. It was found that the quartz dissolving reaction had little or no direct effect on reservoir temperatures for any combination of flow and fracture parameters. It was shown that hydrothermal alteration reactions could contribute significant chemical energy to a fractured system under conditions of small flow rate and large alteration …

Work performed by Dynatherm Corporation for Teledyne Isotopes during a program entitled ''Heat Pipe Fabrication, Associated Technical Support and Reporting'' is reported. The program was initiated on November 29, 1972; the main objectives were accomplished with the delivery of the heat pipes for the HPG. Life testing of selected heat pipe specimens is continuing to and beyond the present date. The program consisted of the following tasks: Heat Pipe Development of Process Definition; Prototype Heat Pipes for Fin Segment Test; HPG Heat Pipe Fabrication and Testing; Controlled Heat Pipe Life Test; and Heat Pipe Film Coefficient Determination. (TFD)

Research progress towards the development of a heat pipe for use in the Low Cost High Performance Thermoelectric Generator Program is reported for the period May 15, 1975 through June 1975. (TFD)

Data are presented from measurements of soil moisture at the Hanford Reservation. Possible mechanisms for moisture transport in arid and semi-arid climates were studied. Measurements for the lysimeter experiment and the thermocouple psychrometer experiment were continued with a new series of measurements using closely spaced sensors installed to a depth of 1.52 meters. During the 1973-1974 water year the percolation envelope of higher moisture content penetrated to a depth of four meters in the closed-bottom lysimeter and then was eliminated by upward transport of water in late summer. Precipitation during the 1973-1974 water year percolated to a depth of about six meters in the open-bottom lysimeter and remains as a residual perched envelope. The increase over normal percolation was due in part to a residual envelope of higher moisture content from the previous water year. Results obtained indicate the advantages of Hanford as a site for a national repository for radioactive waste. (CH)

Medium temperature water can be utilized for production of electrical energy when it is available in massive quantities. The design concepts herein are to provide a base for feasibility studies and evaluate processes with consideration of the economics of developing this electrical energy on a commercial scale. Two methods of producing electrical energy with geothermal water are being considered. The methods discussed in this document are by the flashing process of producing steam for driving turbine-generators. Flash steam systems were evaluated for use with 300/sup 0/F water. Single and multiflash systems were evaluated and component size sensitivity to operating pressures were studied. It was determined that a double flash system is the most practical system. Net power production of approximately 2.4 megawatts/million pounds per hour of brine is estimated for the double flash system which operates at an initial flash pressure of 30 psia and a second stage pressure of 13 psia. Flash pressures below atmospheric are not recommended due to oxygen leakage into the system. Sensitivity analysis has indicated that the power output is not highly sensitive to the first stage flash pressure. A significant loss in power output occurs if the second stage pressure is increased significantly.

Results of initial efforts to investigate application of selenide thermoelectric RTG's to specific missions as well as an indication of development requirements to enable satisfaction of emerging RTG performance criteria are presented. Potential mission applications in DoD such as SURVSATCOM, Advance Defense Support Program, Laser Communication Satellite, Satellite Data System, Global Positioning Satellite, Deep Space Surveillance Satellite, and Unmanned Free Swimming Submersible illustrate power requirements in the range of 500 to 1000 W. In contrast, the NASA applications require lower power ranging from 50 W for outer planetary atmospheric probes to about 200 W for spacecraft flights to Jupiter and other outer planets. The launch dates for most of these prospective missions is circa 1980, a requirement roughly compatible with selenide thermoelectric and heat source technology development. A discussion of safety criteria is included to give emphasis to the requirements for heat source design. In addition, the observation is made that the potential accident environments of all launch vehicles are similar so that a reasonable composite set of design specifications may be derived to satisfy almost all applications. Details of the LCHPG application potential is afforded by three designs: an 80 W RTG using improved selenide thermoelectric material, a 55 …

This report presents the engineering hot channel factors for the fuel temperature corresponding to the breeding performance and pin diameter optimization studies for mixed carbide and nitride fuels in LMFBRs. A discussion of the methodology employed and the rationale behind the selection of each contributor to the hot channel factors are also included.

The four topics covered are: the technical and institutional conditions that shape geothermal development, the factors that determine the value of a geothermal lease, patterns of bidding for geothermal leases offered by the Federal government, and the emerging structure of the geothermal industry.

Progress is reported for a program to demonstrate by 1976 an experimental gas turbine powered automobile which meets the 1978 Federal Emissions Standards, has significantly improved fuel economy, and is competitive in performance, reliability, and potential manufacturing cost with the conventional piston engine powered, standard size American automobile. NASA completed initial heat balance testing of a baseline engine. An additional 450 hours were run on ceramic regenerators and seals. Seal wear rates are very good, and the elastomeric mounting system was satisfactory. An engine/control oil supply system based on the power steering pump is successfully operating in baseline vehicles. The design of the upgraded engine power turbine nozzle actuator was finalized, and layouts of the inlet guide vane actuator are in process. A lock-up torque converter was installed in the free rotor vehicle. Baseline engine and vehicle testing of water injection and variable inlet guide vanes was completed. A thermal analysis of the gas generator is in process. A steady-state, full power analysis was made. A three-dimensional stress analysis of the compressor cover was made. The power turbine nozzle actuating system layout was completed. The analytical studies of the power turbine rotor bearings were completed. MTI completed the design of …

An experiment investigating high multiplicity gamma-ray events in a region covering 18 percent of 4..pi.. around 90/sup 0/ in the center of mass was performed at the CERN ISR by sharing the detector of the CERN-Columbia-Rockefeller group. Information on the dependence of the cross section on gamma-ray multiplicity as well as the dependence of the average gamma-ray and charge multiplicities on the center-of-mass energy was obtained. Studies were made of correlations between the number of gamma-rays and charged particles, as well as between the total number of gamma-rays plus charged particles and the total measured energy per event. Two-body inclusive rapidity distributions in the rapidity interval 0.86 to -0.86 covered by the detector are also presented. The main corrections to the data, as well as considerations of background effects, are extensively discussed. Also discussed are a Monte Carlo calculation of the gamma-ray multiplicity distribution expected from ..pi../sup 0/ decay and a calculation based upon an independent emission model of ..pi../sup 0/ production. Both calculations give identical results, which are found to be several orders of magnitude lower than the experimental results for gamma multiplicities greater than or equal to 10. (auth)

This report presents quantitative and qualitative data obtained during the first full year's operation of an industrial type, solar heating system of pilot plant scale. A brief description of the system is given and operational data for the system is provided along with information on maintenance history, various relevant experiences, individual investigations and experiments, and problem areas which were experienced. (WDM)

The purpose of this report is to recommend a reasonable program of brine chemistry research that will result in the development of methods for predicting and controlling scale deposition, and in guidelines for the selection of corrosion-resistant construction materials. First, background information, which is necessary for the understanding of the problems of scaling and corrosion in the Salton Sea KGRA, is presented through a review of the history of geothermal exploration and development in the Salton Sea. Second, literature relevant to the geochemistry of the Salton Sea field is reviewed and important results are emphasized. Third, current research efforts directed toward actual power plant construction are summarized and evaluated. Fourth, research which has been proposed but is not currently funded is discussed. Fifth, because silica scaling has been the most troublesome problem in the past, the basic chemistry of silica and its relationship to scaling is discussed. Sixth, recommendations for future research are made in which a fundamental engineering approach is emphasized. In this approach, experiments would be conducted on actual process equipment and detailed chemical analyses would be performed on site in well-equipped field laboratories. 88 references.

The Bruneau-Grand View area occupies about 1,100 square miles in southwest Idaho and is on the southern flank of the large depression in which lies the western Snake River Plain. The igneous and sedimentary rocks in the area range in age from Late Cretaceous to Holocene. The aquifers in the area have been separated into two broad units: (1) the volcanic-rock aquifers, and (2) the overlying sedimentary-rock aquifers. The Idavada Volcanics or underlying rock units probably constitute the reservoir that contains thermal water. An audio-magnetotelluric survey indicates that a large conductive zone having apparent resistivities approaching 2 ohm-meters underlies a part of the area at a relatively shallow depth. Chemical analysis of 94 water samples collected in 1973 show that the thermal waters in the area are of a sodium bicarbonate type. Although dissolved-solids concentrations of water ranged from 181 to 1,100 milligrams per litre (mg/1) in the volcanic-rock aquifers, they were generally less than 500 mg/1. Measured chloride concentrations of water in the volcanic-rock aquifers were less than 20 mg/1. Temperatures of water from wells and springs ranged from 9.5/sup 0/ to 83.0/sup 0/C. Temperatures of water from the volcanic-rock aquifers ranged from 40.0/sup 0/ to 83.0/sup 0/C, whereas …

Two brine production methods were compared with respect to available power at the wellhead: self flowing (brine lifted by steam from vaporization of the brine), and pumped (brine lifted by a mechanical pump and kept in the liquid state). Five conversion processes were compared with respect to fraction of available power converted to electric power: flash steam (steam turbines operating on steam from flash vaporization of the brine), dual steam (flash steam with two-phase expanders to recover the flash vaporization mechanical energy), total flow (two-phase expanders only), binary (heat transferred from the brine to a secondary working fluid), and flash binary (heat transferred from flashed steam to a secondary working fluid). The conclusions of this study are: (1) The flow rate from a self-flowing well can be substantially increased by increasing well bore diameter at and above the flashing level. (2) Self-flowing stepped diameter wells provide more wellhead power than pumped wells (for equal production zone diameters) at nearly all reservoir conditions. (3) Multi-stage flash steam systems using steam turbines provide more output power than binary systems at all reservoir temperatures, using reasonable values for component performance. (4) Total flow machines, used alone, offer no performance advantage as compared to …

The analysis of the semantics of programing languages was attempted with numerous modeling techniques. By providing a brief survey of these techniques together with an analysis of their applicability for answering semantic issues, this report attempts to illuminate the state-of-the-art in this area. The intent is to be illustrative rather than thorough in the coverage of semantic models. A bibliography is included for the reader who is interested in pursuing this area of research in more detail.

The report describes a conceptual design study of a fusion test reactor based on the Scyllac toroidal theta-pinch approach to fusion. It is not the first attempt to describe the physics and technology required for demonstrating scientific feasibility of the approach, but it is the most complete design in the sense that the physics necessary to achieve the device goals is extrapolated from experimentally tested MHD theories of toroidal systems,and it uses technological systems whose engineering performance has been carefully calculated to ensure that they meet the machine requirements.

"This study was conducted to update information which was published in 1971 so that hog producers can examine and analyze costs and returns of swine rearing operations and make necessary adjustments when needed to better cope with changing conditions" (p. viii).

The work described applies to the general problem of seismic coupling in geologic materials. In addition to work carried out during the past project year, important results from previous years were included so as to make the report as self contained as possible. Shock wave loading and release wave paths have been experimentally determined for Arkansas novaculite (a polycrystalline quartz rock), a perthitic feldspar, Nugget sandstone, dry and water-saturated Mount Helen tuff, Linden Hall limestone, dry and water-saturated Indiana limestone, and Blair dolomite. Multiple in-material stress and particle velocity gages were used to record stress-time and particle velocity-time profiles at several depths in specimens in the stress range from 60 to 500 kbar. Results are given.

The objective of this program is to develop a dissolved sulfur cathode which can be repeatably charged and discharged with minimal degradation and which is compatible with a Li anode. The redox behavior of dilute S/sub 8/, 0.1--1M LiClO/sub 4/ solutions in dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), tetrahydrofuran (THF), propylene carbonate (PC), ..gamma..-butyrolactone (BL), sulfolane (SL), methyl acetate (MA) and pyridine was investigated. S/sub 8/ and S/sub 8//sup - -/ reductions occur at more positive potentials and the redox reactions are more reversible in DMSO and DMF than in the other solvents. Some evidence exists for the precipitation of Li/sub 2/S/sub x/ species on Au and Pt working electrodes (but not on C). The electrochemical behavior of Li/sub 2/S/sub x/ solutions was examined. Cyclic voltammograms of polysulfide solutions in DMSO showed generally reductions at more negative potentials and oxidations at more positive potentials than those for S/sub 8/ solutions. The polysulfide and S/sub 8/ voltammograms in THF were more similar. Steady-state current potential curves of DMSO--Li/sub 2/S/sub x/ solutions generally revealed no sizeable reduction currents positive of approximately 1.5 V vs. Li. Galvanostatic discharge of Li/sub 2/S/sub x/ solutions occurs between 1.0 and 2.0 V. Recharge (with a 4.0 …

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