Resource Type

States

137 Matching Results

Results open in a new window/tab.

Geothermal Energy Resource Investigations in the Eastern Copper River Basin, Alaska (open access)

Geothermal Energy Resource Investigations in the Eastern Copper River Basin, Alaska

This report consists of a review of the geological, geochemical and geophysical data available for the Eastern Copper River basin with emphasis on the mud volcanoes, and the results of geophysical and geochemical studies carried out in the summers of 1982 and 1984. The purpose was to determine if there are geothermal energy resources in the Copper River Basin. The Eastern Copper River basin is situated on the flanks of a major volcano, Mt. Drum, which was active as late as 200,000 years ago and which is thought to have retained significant amounts of residual heat at high levels. Mt. Wrangell, farther to the east, has been volcanically active up to the present time. The 1982 geophysical and geochemical surveys located three principal areas of possible geothermal interest, one near Tazlina and two near the Klawasi mud volcanoes. The intensive survey work of 1984 was concentrated on those areas. We have integrated the results of soil helium, soil mercury, gravity, aeromagnetic, electrical, self-potential, and controlled-source audio magnetotelluric (CSAMT) surveys to evaluate the geothermal potential of the areas studied. 36 figs.
Date: June 1, 1985
Creator: Wescott, E. M. & Turner, D. L.
System: The UNT Digital Library
Ultrasonic longitudinal wave velocity in carbon-carbon Pitch and Pitch/M2 shape stable nosetip material from 70/sup 0/F to 5400/sup 0/F (open access)

Ultrasonic longitudinal wave velocity in carbon-carbon Pitch and Pitch/M2 shape stable nosetip material from 70/sup 0/F to 5400/sup 0/F

A pulse echo method was used in two notched rods of carbon-carbon Pitch material and one rod of Pitch/M2 shape stable nosetip material to measure the temperature dependence of the longitudinal wave velocity from room temperature to 5400/sup 0/F. The velocity was constant to within 2% of the room temperature value for the Pitch parent material throughout the temperature range. For the Pitch/M2 material, the velocity increased to a maximum of 10% at 4000/sup 0/F and then decreased rapidly. Room temperature velocities in the principal directions of the composite are also given for the two Pitch rods, which showed a 15% decrease in velocity near the ends of both rods and near the side of one rod.
Date: June 1, 1985
Creator: Gieske, J. H.
System: The UNT Digital Library
Status of the DOE Battery and Electrochemical Technology Program V (open access)

Status of the DOE Battery and Electrochemical Technology Program V

The program consists of two activities, Technology Base Research (TBR) managed by the Lawrence Berkeley Laboratory (LBL) and Exploratory Technology Development and Testing (EDT) managed by the Sandia National Laboratories (SNL). The status of the Battery Energy Storage Test (BEST) Facility is presented, including the status of the batteries to be tested. ECS program contributions to the advancement of the lead-acid battery and specific examples of technology transfer from this program are given. The advances during the period December 1982 to June 1984 in the characterization and performance of the lead-acid, iron/nickel-oxide, iron/air, aluminum/air, zinc/bromide, zinc/ferricyanide, and sodium/sulfur batteries and in fuel cells for transport are summarized. Novel techniques and the application of established techniques to the study of electrode processes, especially the electrode/electrolyte interface, are described. Research with the potential of leading to improved ceramic electrolytes and positive electrode container and current-collectors for the sodium/sulfur battery is presented. Advances in the electrocatalysis of the oxygen (air) electrode and the relationship of these advances to the iron/air and aluminum/air batteries and to the fuel cell are noted. The quest for new battery couples and battery materials is reviewed. New developments in the modeling of electrochemical cell and electrode performance with …
Date: June 1, 1985
Creator: Roberts, R.
System: The UNT Digital Library
Measurement of the analyzing power for pion proton elastic scattering between 471 and 687 MeV/c (open access)

Measurement of the analyzing power for pion proton elastic scattering between 471 and 687 MeV/c

The analyzing power, A/sub N/, has been measured for ..pi../sup + -/p..--> pi../sup + -/p at 471, 547, 625, and 687 MeV/c in an angular range corresponding to -0.9 less than or equal to cos theta/sub cm/ less than or equal to 0.8. A polarized proton target with polarization axis normal to the scattering plane was used. The scattered pion and recoil proton were detected in coincidence, using a magnetic spectrometer and a wire chamber/scintillator array, except in cases where one of the particles was kinematically inaccessible. Statistical uncertainties in the data are as low as 0.02; systematic uncertainties are estimated to be less than 3%. The ..pi../sup -/p data are characterized by large values of analyzing power, and rapid variations in the angular distribution with incident momentum. The measurements are compared with the results of existing partial wave analysis.
Date: June 1, 1985
Creator: Mokhtari-Amirmajdi, A.
System: The UNT Digital Library
Underground Energy Storage Program. 1984 annual summary (open access)

Underground Energy Storage Program. 1984 annual summary

Underground Energy Storage (UES) Program activities during the period from April 1984 through March 1985 are briefly described. Primary activities in seasonal thermal energy storage (STES) involved field testing of high-temperature (>100/sup 0/C (212/sup 0/F)) aquifer thermal energy storage (ATES) at St. Paul, laboratory studies of geochemical issues associated with high-temperatures ATES, monitoring of chill ATES facilities in Tuscaloosa, and STES linked with solar energy collection. The scope of international activities in STES is briefly discussed.
Date: June 1, 1985
Creator: Kannberg, L.D.
System: The UNT Digital Library
Spin-flip (p,n) reactions on /sup 26/Mg, /sup 54/Fe, and /sup 56/Fe at selected proton bombarding energies in the range of 17 to 25 MeV (open access)

Spin-flip (p,n) reactions on /sup 26/Mg, /sup 54/Fe, and /sup 56/Fe at selected proton bombarding energies in the range of 17 to 25 MeV

New data are presented for the /sup 26/Mg(p,n)/sup 26/Al reaction at E/sub p/ = 19.12 and 24.97 MeV, for the /sup 54/Fe(p,n)/sup 54/Co reaction at E/sub p/ = 17.20, 18.60, and 24.60 MeV, and for the /sup 56/Fe(p,n)/sup 56/Co reaction at E/sub p/ = 19.12 and 24.59 MeV. Data were taken with the LLNL Cyclograaff at 16 angles from 3.5/sup 0/ to 159.0/sup 0/. A large detector at 23.8/sup 0/ with a long neutron flight path collected high resolution spectra. This large detector also collected separate 0/sup 0/ high resolution data on the /sup 26/Mg and /sup 56/Fe(p,n) reactions at E/sub p/ = 19 MeV. Absolute differential (p,n) cross sections were extracted for 1/sup +/ states in /sup 26/Al, /sup 54/Co, and /sup 56/Co, for the 0/sup +/ isobaric analong state (IAS) in /sup 54/Co and /sup 56/Co, for a 2/sup +/ state in each residual nucleus, and for the 0.199 MeV 7/sup +/ state of /sup 54/Co. No new experimental states were identified. Only relative cross sections were extracted at 0/sup 0/. Experimental angle-integrated cross sections were obtained for all but one state. DWBA79 was used, with the G-matrix effective nucleon-nucleon interaction of Bertsch et al. (with the central …
Date: June 1, 1985
Creator: Aron, D.L.
System: The UNT Digital Library
Heavy ion fusion half year report, October 1, 1984-March 30, 1985 (open access)

Heavy ion fusion half year report, October 1, 1984-March 30, 1985

Summaries of research are given for each of the following experiments: (1) MBE-4: a four-beam induction linac experiment, (2) performance of the MBE-4 injector, (3) design procedure for acceleration and bunching in an induction linac, (4) longitudinal dynamics of MBE-4, (5) transverse beam dynamics, (6) envelope functions of high-current beam, (7) electrostatic energy analyzer, (8) longitudinal beam control, (9) a capacitive beam-charge monitor for SBTE, (10) materials R and D, (11) simulations of Robertson's lens, and (12) SBTE high sigma/sub 0/ high-current stability limits. (MOW)
Date: June 1, 1985
Creator: unknown
System: The UNT Digital Library
X-ray diffraction study of reversible deformation mechanisms in the aged uranium-6. 5 niobium alloy (open access)

X-ray diffraction study of reversible deformation mechanisms in the aged uranium-6. 5 niobium alloy

The x-ray diffraction (XRD) data from 200/sup 0/C/2h-aged uranium-6.5 wt % niobium (U-6.5Nb) alloys, taken under stress as a function of strain, revealed a gamma-zero (..gamma../sup 0/)..-->.. alpha prime-prime (..cap alpha..'') thermoelastic martensitic phase transformation. It was concluded that the primary reversible deformation modes consisted of the movement of ..gamma../sup 0//..cap alpha..'' interphase interfaces and ..cap alpha..'' intervariant interfaces. Specimen elasticity at low strains was associated with the retreat of interphase interfaces. At higher strains, interphase interfaces did not recover significantly on unloading, and elasticity was due primarily to the retreat of ..cap alpha..'' intervariant interfaces.
Date: June 21, 1985
Creator: Carpenter, D.A.
System: The UNT Digital Library
Manual for the thermal and hydraulic design of direct contact spray columns for use in extracting heat from geothermal brines (open access)

Manual for the thermal and hydraulic design of direct contact spray columns for use in extracting heat from geothermal brines

This report outlines the current methods being used in the thermal and hydraulic design of spray column type, direct contact heat exchangers. It provides appropriate referenced equations for both preliminary design and detailed performance. The design methods are primarily empirical and are applicable for us in the design of such units for geothermal application and for application with solar ponds. Methods for design, for both preheater and boiler sections of the primary heat exchangers, for direct contact binary powers plants are included. 23 refs., 8 figs.
Date: June 1, 1985
Creator: Jacobs, H. R.
System: The UNT Digital Library
Black holes, pregalactic stars, and the dark matter problem (open access)

Black holes, pregalactic stars, and the dark matter problem

We review the different ways in which black holes might form and discuss their various astrophysical and cosmological consequences. We then consider the various constraints on the form of the dark matter and conclude that black holes could have a significant cosmological density only if they are of primordial origin or remnants of a population of pregalactic stars. This leads us to discuss the other cosmological effects of primordial black holes and pregalactic stars. 239 refs., 7 figs., 5 tabs.
Date: June 1, 1985
Creator: Carr, B.J.
System: The UNT Digital Library
Lectures on probability and statistics. Revision (open access)

Lectures on probability and statistics. Revision

These notes are based on a set of statistics lectures delivered at Imperial College to the first-year postgraduate students in High Energy Physics. They are designed for the professional experimental scientist. They begin with the fundamentals of probability theory, in which one makes statements about the set of possible outcomes of an experiment, based upon a complete a priori understanding of the experiment. For example, in a roll of a set of (fair) dice, one understands a priori that any given side of each die is equally likely to turn up. From that, we can calculate the probabilty of any specified outcome. They finish with the inverse problem, statistics. Here, one begins with a set of actual data (e.g., the outcomes of a number of rolls of the dice), and attempts to make inferences about the state of nature which gave those data (e.g., the likelihood of seeing any given side of any given die turn up). This is a much more difficult problem, of course, and one's solutions often turn out to be unsatisfactory in one respect or another. Hopefully, the reader will come away from these notes with a feel for some of the problems and uncertainties involved. …
Date: June 1, 1985
Creator: Yost, G.P.
System: The UNT Digital Library
Characterizing the sources, range, and environmental influences of radon 222 and its decay products (open access)

Characterizing the sources, range, and environmental influences of radon 222 and its decay products

Recent results from our group directly assist efforts to identify and control excessive concentrations of radon 222 and its decay products in residential environments. We have demonstrated directly the importance of pressure-induced flow of soil gas for transport of radon from the ground into houses. Analysis of available information from measurements of concentration in US homes has resulted in a quantitative appreciation of the distribution of indoor levels, including the degree of dependence on geographic location. Experiments on the effectiveness of air cleaning devices for removal of particles and radon decay products indicate the potential and limitations of this approach to control. 30 refs., 3 figs.
Date: June 1, 1985
Creator: Nero, A. V.; Sextro, R. G.; Doyle, S. M.; Moed, B. A.; Nazaroff, W. W.; Schwehr, M. B. et al.
System: The UNT Digital Library
Evaluation of geologic controls on geothermal anomalies in the Arkoma Basin, Oklahoma (open access)

Evaluation of geologic controls on geothermal anomalies in the Arkoma Basin, Oklahoma

Vitrinite-reflectance techniques were used to determine if there is a relationship between present geothermal gradient and coal rank in the Arkoma Basin. Three coal seams from high geothermal-gradient areas were compared with the same coal seams, respectively, from low geothermal-gradient areas. Samples were obtained from three core holes that were drilled in the high geothermal-gradient areas in Pittsburg and Haskell Counties, and three core holes that were drilled in the low geothermal-gradient areas in Latimer and Muskogee Counties. Nine additional coal samples were collected from active coal mines and one from an outcrop to supplement the core samples. The vitrinite-reflectance data indicates the present geothermal gradient did not produce the coal rank in the Arkoma Basin of Oklahoma. The coal rank is believed to have developed during the late Paleozoic, possibly in connection with the Ouachita orogeny. The coal isocarb maps suggest that the present geothermal-gradient pattern reflects the paleogeothermal gradient that produced the coal rank. Perhaps the intense folding and faulting associated with the Ouachita orogeny combined to transmit heat from the basement along an east-west thermal-anomaly zone through Haskell and Pittsburg Counties, Oklahoma. 60 refs., 16 figs., 3 tabs.
Date: June 1, 1985
Creator: Cardott, B. J.; Hemish, L. A.; Johnson, C. R. & Luza, K. V.
System: The UNT Digital Library
Heavy-Ion Fusion System Assessment Project quarterly status report, January-March 1985 (open access)

Heavy-Ion Fusion System Assessment Project quarterly status report, January-March 1985

A computer model of an accelerator system is a necessary ingredient in estimating the cost of construction and operation of an ion-driven ICF power plant. The LBL computer program LIACEP (Linear Induction Accelerator Cost Evaluation Program) is used to estimate the cost and efficiency of a heavy ion induction linear accelerator as a function of the ion mass, charge and energy for a specified beam output energy, power and pulse repetition frequency. In addition to estimating the accelerator system cost and efficiency, LIACEP can be used to identify the components and materials that have a high leverage on the cost and efficiency of the accelerator system. These high leverage items are logical areas for research and technology development to reduce the cost and increase the efficiency of the accelerator system.
Date: June 1, 1985
Creator: Lee, E.P.; Hovingh, J. & Faltens, A.
System: The UNT Digital Library
Three-dimensional mise-a-la-masse modeling applied to mapping fracture zones (open access)

Three-dimensional mise-a-la-masse modeling applied to mapping fracture zones

A numerical scheme applying the method of integral equations has been developed for borehole-to-borehole and borehole-to-surface modeling of the apparent resistivity response of a thin conductive body in a half-space; the inhomogeneity simulates a fracture zone. The algorithm is applicable for the direct-current case when the buried electrode is either inside (mise-a-la-masse) or outside (near-miss) the body. In implementing the scheme, the integral equation is transformed into a matrix equation as a result of discretizing the inhomogeneity into rectangular subcells. All properties are assumed to be constant within each subcell. The rectangular subcells are used throughout execution of the algorithm. The computed surface and subsurface apparent resistivity responses are examined for similar bodies with different orientations: (1) vertical, (2) horizontal, (3) dipping at 60 degrees, and (4) dipping at 30 degrees. The different bodies produce apparent resisitivity cross-section plots which differ little from each other with the exception of orientation. 21 refs., 38 figs.
Date: June 1, 1985
Creator: Beasley, C. W. & Ward, S. H.
System: The UNT Digital Library
Superconductor procurement and R and D for SSC (open access)

Superconductor procurement and R and D for SSC

We describe the results of superconductor procurements for SSC dipole model magnets. Most results will pertain to LBL procurements for the LBL-BNL collaboration; however, where appropriate to complete the SSC data base, reference will be made to material purchased by FNAL and TAC. Also, most of the results to be presented will relate to the conventional SSC conductors, i.e., with filament sizes in the range of 15 to 25 ..mu..m. Some information on fine filament NbTi material, such as quantities and delivery schedules, will be presented here; fine filament NbTi R and D is described in another section.
Date: June 1, 1985
Creator: Scanlan, R.; Royet, J.; Hannaford, R. & Horler, D.
System: The UNT Digital Library
EE Technical Review (open access)

EE Technical Review

Areas of research reported include: ultrafast gating of microchannel plate x-ray spectrometers, study of power MOS fast switching techniques, lightning vulnerability of nuclear explosive test systems at the Nevada Test Site, and a computer model of the MFTF-B neutral beam accel dc power supply.
Date: June 1, 1985
Creator: unknown
System: The UNT Digital Library
Adult Fishway Inspections on the Columbia and Snake Rivers, 1984-1985 Annual Report. (open access)

Adult Fishway Inspections on the Columbia and Snake Rivers, 1984-1985 Annual Report.

Mainstream projects which have adult fish passage facilities are inspected by project operators, fishway attendants, and state and federal fishery agencies. The overall movement of upstream migrants in 1984 appeared to be satisfactory with few delays. Special efforts were made by fishery agencies and Corps personnel to check on potential problems which appeared to exist at The Dalles and John Day Dams this year. However, adult passage facilities were operating ''in criteria'' and fish may have been delayed by temperature or other factors. Inspections were generally made once a month. Some projects were operating at less than full criteria as seen during inspections by fishery agencies this year. It appears that during periods of low tailwater, certain projects have difficulty maintaining proper head at main fishway entrances. Some main entrance gates bottom-out and water depth over these weirs are not up to desired criteria. Also it was noted that auxiliary water pumps were not being run at a rate to achieve the desired amount of water for attracting fish to the fish ladders and maintaining proper head at main fishway entrances.
Date: June 28, 1985
Creator: Basham, Larry R.
System: The UNT Digital Library
Wind loading on solar collectors (open access)

Wind loading on solar collectors

The present design methodology for the determination of wind loading on the various solar collectors has been reviewed and assessed. The total force coefficients of flat plates of aspect ratios 1.0 and 3.0, respectively, at various angles of attack obtained by using the guidelines of the ANSI A58.1-1982, have been compared with those obtained by using the methodology of the ASCE Task Committee, 1961, and the experimental results of the full-scale test of heliostats by Peglow. The turbulent energy spectra, currently employed in the building code, are compared with those of Kaimal et al., Lumley, and Ponofsky for wind velocities of 20.0 m/s and 40.24 m/s at an elevation of 9.15 m. The longitudinal spectra of the building code overestimates the Kaimal spectra in the frequency range of 0.007 Hz to 0.08 Hz and underestimates beyond the frequency of 0.08 Hz. The peak angles of attack, on the heliostat, stowed in horizontal position, due to turbulent vertical and lateral components of wind velocity, have been estimated by using Daniel's methodology for three wind velocities and compared with the value suggested by the code. The experimental results of a simple test in the laboratory indicate the feasibility of decreasing the drag …
Date: June 1, 1985
Creator: Bhaduri, S. & Murphy, L.M.
System: The UNT Digital Library
Tutorial on the Warren Abstract Machine for Computational Logic (open access)

Tutorial on the Warren Abstract Machine for Computational Logic

Tutorial description of the Warren machine with a basic introduction to the motivation of the machine and the instructions that define it. Discussion of the fairly limited extensions required to extend the machine for more general use outside of implementations of logic programming. Substantial speedups will occur due to improvements in the implementation of the basic algorithms.
Date: June 1985
Creator: Gabriel, John R.; Lindholm, Tim; Lusk, E. L. & Overbeek, R. A.
System: The UNT Digital Library
Advanced Fuel Cell Development Progress Report: July-September 1984 (open access)

Advanced Fuel Cell Development Progress Report: July-September 1984

Quarterly report discussing fuel cell research and development work at Argonne National Laboratory (ANL). This report describes studies directed toward seeking alternative cathode materials to NiO for molten carbonate fuel cells.
Date: June 1985
Creator: Ackerman, J. P.; Pierce, Robert Dean; Nelson, P. A. & Arons, R. M.
System: The UNT Digital Library
Fluid Forces on Two Circular Cylinders in Crossflow (open access)

Fluid Forces on Two Circular Cylinders in Crossflow

Fluid excitation forces are measured in a water loop for two circular cylinders arranged in tandem and normal to flow. The Strouhal number and fluctuating drag and lift coefficients for both cylinders are presented for various spacings and incoming flow conditions. Results show the effects of Reynolds number, pitch ratio, and upstream turbulence on the fluid excitation forces.
Date: June 1985
Creator: Jendrzejczyk, J. A. & Chen, Shoei-Sheng
System: The UNT Digital Library
Flow-Induced Vibration of Circular Cylindrical Structures (open access)

Flow-Induced Vibration of Circular Cylindrical Structures

This report summarizes the flow-induced vibration of circular cylinders in quiescent fluid, axial flow, and crossflow, and applications of the analytical methods and experimental data in design evaluation of various system components consisting of circular cylinders.
Date: June 1985
Creator: Chen, Shoei-Sheng
System: The UNT Digital Library
Use of Monitors in FORTRAN: a Tutorial on the Barrier, Self-Scheduling DO-Loop, and Askfor Monitors (open access)

Use of Monitors in FORTRAN: a Tutorial on the Barrier, Self-Scheduling DO-Loop, and Askfor Monitors

A set of macro libraries has been developed that allows programmers to write portable FORTRAN code for multiprocessors. This document presents, in tutorial form, the macros used to implement three common synchronization patterns: self-scheduling DO-loops, barrier synchronization, and the askfor monitor.
Date: June 1985
Creator: Lusk, Ewing L. & Overbeek, Ross A.
System: The UNT Digital Library