Resource Type

5,111 Matching Results

Results open in a new window/tab.

For the Record, Spring 1994 (open access)

For the Record, Spring 1994

For the Record section including the minutes of the quarterly board meeting of the Board of Directors of the Oklahoma Historical Society that was held on October 27, 1993.
Date: Spring 1994
Creator: Oklahoma Historical Society
System: The Gateway to Oklahoma History
Printing Ink and Flyingwires: Oklahoma Journalism and the Promotion of Aviation (open access)

Printing Ink and Flyingwires: Oklahoma Journalism and the Promotion of Aviation

Article describes the promotional activities of Oklahoma journalists in the early twentieth century in support of the fledgling aviation industry. Keith Tolman explores early attitudes towards aviation and the impact the journalists made when they took to the skies with their papers.
Date: Spring 1994
Creator: Tolman, Keith
System: The Gateway to Oklahoma History
Oklahoma Jazz: Deep Second to 52nd Street (open access)

Oklahoma Jazz: Deep Second to 52nd Street

Article examines statistical sources to trace the history of jazz music in Oklahoma and the careers of jazz artists born in Oklahoma, as well as the jazz bands and outlets that flourished there. George O. Carney also explores the expansion of these artists and bands into the wider sphere of the nation and the world.
Date: Spring 1994
Creator: Carney, George O.
System: The Gateway to Oklahoma History
[Clipping: Good Turn Out for Work Party: Squadron Members Help to "Keep 'Em Flying!"] (open access)

[Clipping: Good Turn Out for Work Party: Squadron Members Help to "Keep 'Em Flying!"]

Article about the Confederate Air Force squadron coming together for an all day event to clean and repair planes for an upcoming air show. Woman Airforce Service Pilot, Mary Ruth Rance, is noted to have attended and helped out, and an arrow is drawn in pencil pointing her out in a group photo on the page. A handwritten note above the photo reads, "Golden Gate Squadron Confederate Air Force Newsletter ~1994"
Date: 1994~
Creator: Craig, George
System: The Portal to Texas History
Portable shift register (open access)

Portable shift register

An electronics package for a small, battery-operated, self-contained, neutron coincidence counter based on a portable shift-register (PSR) has been developed. The counter was developed for applications not adequately addressed by commercial packages, including in-plant measurements to demonstrate compliance with regulations (domestic and international), in-plant process control, and in-field measurements (environmental monitoring or safeguards). Our package's features, which address these applications, include the following: Small size for portability and ease of installation;battery or mains operation; a built-in battery to power the unit and a typical detector such as a small sample counter, for over 6 h if power lines are bad or noisy, if there is a temporary absence of power, or if portability is desired; complete support, including bias, for standard neutron detectors; a powerful communications package to easily facilitate robust external control over a serial port; and a C-library to simplify creating external control programs in computers or other controllers. Whereas the PSR specifically addresses the applications mentioned above, it also performs all the measurements made by previous electronics packages for neutron coincidence counters developed at Los Alamos and commercialized. The PSR electronics package, exclusive of carrying handle, is 8 by 10 by 20 cm; it contains the circuit …
Date: January 1, 1994
Creator: Halbig, J. K.; Bourret, S. C.; Hansen, W. J.; Hicks, D. V.; Klosterbuer, S. F. & Krick, M. S.
System: The UNT Digital Library
Portable nondestructive testing and dynamic test diagnostics at Los Alamos National Laboratory (open access)

Portable nondestructive testing and dynamic test diagnostics at Los Alamos National Laboratory

Los Alamos National Laboratory maintains one of the most complete NDT facilities worldwide. In addition to many fixed pieces of equipment, the Laboratory has a very wide range of NDT and dynamic test diagnostic equipment that can be taken to the job site. Most of the equipment described here was procured for a specific purpose to support a program consistent with the nuclear weapons mission of Los Alamos. However, through the years, the equipment has found use in many other applications both within and external to weapons research, development, and testing. Various combinations of these equipments form unique capabilities, as demonstrated by the applications. The portable equipment is mainly applied to problems where the process or object under study cannot be brought into an NDT laboratory.
Date: November 1, 1994
Creator: Fry, D. A.; Brooks, G. H.; Bryant, L. E.; Guerrero, A. & Valdez, J. E.
System: The UNT Digital Library
Fluidization studies using Phillips Z-SORB sorbent (open access)

Fluidization studies using Phillips Z-SORB sorbent

The objectives of this project are to determine the long-term chemical reactivity and mechanical durability of a fluidized version of Phillips Petroleum Company`s proprietary Z-SORB sorbent for the desulfurization of coal-derived gases in a high-pressure (20 atm) fluidized-bed reactor under simulated U-Gas conditions and at a moderate operating temperature of 538 degrees C.
Date: October 1, 1994
Creator: Gangwal, S. K.; Gupta, R. P.; Khare, G. P.; Delzer, G. A. & Kubicek, D. H.
System: The UNT Digital Library
Tritium and decay helium effects on the fracture toughness properties of types 316L, 304L and 21Cr-6Ni-9Mn stainless steels (open access)

Tritium and decay helium effects on the fracture toughness properties of types 316L, 304L and 21Cr-6Ni-9Mn stainless steels

J-integral fracture mechanics techniques and electron microscopy observations were used to investigate the effects of tritium and its radioactive decay product, {sup 3}He, on Types 316L, 304L and 21Cr-6Ni-9Mn stainless steels. Tritium-exposed-and-aged steels had lower fracture-toughness values and shallower sloped crack-growth-resistance curves than unexposed steels. Both fracture-toughness parameters decreased with increasing concentrations of {sup 3}He. The fracture-toughness reductions were accompanied by a change in fracture mode from microvoid-nucleation-and-growth processes in control samples to grain-and-twin-boundary fracture in tritium-charged-and-aged samples. Type 316L stainless steel had the highest fracture-toughness values and Type 21Cr-6Ni-9Mn had the lowest. Samples containing {sup 3}He but degassed of tritium had fracture toughness properties that were similar to uncharged samples. The results indicate that helium bubbles enhance the embrittlement effects of hydrogen by affecting the deformation properties and by increasing localized hydrogen concentrations through trapping effects.
Date: October 1, 1994
Creator: Morgan, M. J. & Tosten, M. H.
System: The UNT Digital Library
TFTR experience with D-T operation (open access)

TFTR experience with D-T operation

Temperatures, densities and confinement of deuterium plasmas confined in tokamaks have been achieved within the last decade that are approaching those required for a D-T reactor. As a result, the unique phenomena present in a D-T reactor plasma can now be studied in the laboratory. Recent experiments on the Tokamak Fusion Test Reactor (TFTR) have been the first magnetic fusion experiments to study plasmas with reactor fuel concentrations of tritium. The injection of {approximately}20 MW of tritium and 14 MW of ceuterium neutral beams into the TFTR produced a plasma with a T/D density ratio of {approximately}1 and yielded a maximum fusion power of {approximately}9.2 MW. The fusion power density in the core of the plasma was {approximately}1.8 MW m{sup {minus}3} approximating that expected in a D-T fusion reactor. A TFTR plasma with T/D density ratio of {approximately}1 was found to have {approximately}20% higher energy confinement time than a comparable D plasma, indicating a confinement scaling with average ion mass, A, of {tau}{sub E} {approximately} A{sup 0.6}. The core ion temperature increased from 30 keV to 37 keV due to a 35% improvement of ion thermal conductivity. Using the electron thermal conductivity from a comparable deuterium plasma, about 50% of …
Date: October 1, 1994
Creator: Meade, D. M.
System: The UNT Digital Library
Level set techniques applied to unsteady detonation propagation (open access)

Level set techniques applied to unsteady detonation propagation

None
Date: November 1, 1994
Creator: Stewart, D. S.; Aslam, T.; Yao, Jin & Bdzil, J. B.
System: The UNT Digital Library
Demonstration of zinc/air fuel battery to enhance the range and mission of fleet electric vehicles: Preliminary results in the refueling of a multicell module (open access)

Demonstration of zinc/air fuel battery to enhance the range and mission of fleet electric vehicles: Preliminary results in the refueling of a multicell module

We report progress in an effort to develop and demonstrate a refuelable zinc/air battery for fleet electric vehicle applications. A refuelable module consisting of twelve bipolar cells with internal flow system has been refueled at rates of nearly 4 cells per minute refueling time of 10 minutes for a 15 kW, 55 kWh battery. The module is refueled by entrainment of 0.5-mm particles in rapidly flowing electrolyte, which delivers the particles into hoppers above each cell in a parallel-flow hydraulic circuit. The concept of user-recovery is presented as an alternative to centralized service infrastructure during market entry.
Date: August 8, 1994
Creator: Cooper, J. F.; Fleming, D.; Keene, L.; Maimoni, A.; Peterman, K. & Koopman, R.
System: The UNT Digital Library
Status of the Morgantown Energy Technology Center`s Particulate Cleanup Program -- enabling technology for advanced coal-based power systems (open access)

Status of the Morgantown Energy Technology Center`s Particulate Cleanup Program -- enabling technology for advanced coal-based power systems

Advanced coal-based power systems, such as integrated gasification and pressurized fluidized-bed combustion, require particulate removal at high temperatures and high pressure under adverse chemical conditions. To facilitate the development of advanced coal-based power systems, then Morgantown Energy Technology Center (METC) has assembled a Particulate Cleanup Program, which conducts technology demonstration projects and applied research to address the adverse filtration conditions and filter system issues, as well as the future performance demands of these systems.
Date: October 1, 1994
Creator: Dennis, R. A.
System: The UNT Digital Library
Semi-leptonic form-factors from lattice QCD (open access)

Semi-leptonic form-factors from lattice QCD

We present results for semi-leptonic form-factors obtained on statistical sample of 63 32{sup 3} {times} 64 lattices at {beta} = 6.0 using quenched Wilson fermions. We find f{sub +}{sup D{yields}Klv} (q{sup 2} = 0) = 0.73 {plus_minus} 0.06, A{sub 2}/A{sub 1}(D {yields} K*lv) = 0.79 {plus_minus} 0.23, V/A{sub 1}(D{sub s} {yields} {phi}lv) = 1.89 {plus_minus} 0.04, and A{sub 2}/A{sub 1}(D{sub s} {yields} {phi}lv) = 0.70 {plus_minus} 0.09, where the error estimate includes statistical errors and errors due to extrapolation to q{sup 2} = 0 and to physical values of (m{sub u} + m{sub d})/2 and m{sub s}. The remaining sources of systematic errors are those due to O(a) discretization errors and those due to quenching, which our results indicate may be small. We also comment on the validity of pole-dominance in these form-factors.
Date: October 1, 1994
Creator: Bhattacharya, T. & Gupta, R.
System: The UNT Digital Library
Research on U.S. nuclear power plant major equipment aging (open access)

Research on U.S. nuclear power plant major equipment aging

The U.S. Department of Energy (DOE) and the Electric Power Research Institute (EPRI), in cooperation with nuclear power plant utilities and the Nuclear Energy Institute, have prepared equipment aging evaluations of nuclear power plant equipment for life extension considerations. Specifically, these evaluations focused on equipment considered important for plant license renewal (U.S. Code of Federal Regulations 10CFR54). {open_quotes}Industry Reports{close_quotes} (IRs), jointly funded by DOE and EPRI, evaluated the aging of major systems, structures, and components (e.g., reactor pressure vessels, Class I structures, PWR and BWR containments, etc.) and contain a mixture of technical and licensing information. {open_quotes}Aging Management Guidelines{close_quotes} (AMGs), funded by DOE, evaluate aging for commodity types of equipment (e.g., pumps, electrical switchgear, heat exchangers, etc.) and concentrate on technical issues only. AMGs are intended for systems engineers and plant maintenance staff. A significant number of technical issues were resolved during IR interactions with the U.S. Nuclear Regulatory Commission (NRC). However, certain technical issues have not been resolved and are considered {open_quotes}open{close_quotes}. Examples include certain issues related to fatigue, neutron irradiation embrittlement, intergranular stress corrosion cracking (IGSCC) and electrical cable equipment qualification. Direct NRC interaction did not take place during preparation of individual AMGs due to their purely technical …
Date: October 1, 1994
Creator: Nakos, J. T. & Rosinski, S. T.
System: The UNT Digital Library
Assessing the relative contribution of biogenic and fossil processes to visibility scattering aerosols found in remote areas: Near-term Organic Research Program (open access)
Color orthophotography: To scan or not (open access)

Color orthophotography: To scan or not

A picture is worth a thousand words, which explains why digital orthophotographs have become such a popular item. Today, most procurement of orthophotographs result in a digital product. However, if one already has hard copy orthophotography, should one scan them, or have them produced as true digital orthophotographs? What are the advantages and disadvantages of each methodology? This paper examines the procedure the Facility for Information Management, Analysis, and Display (FIMAD) at Los Alamos National Laboratory (LANL) uses to determine the appropriate product based on our needs. The scanned product is compared to a digitally produced orthophotograph, procured through a vendor. Comparison is performed on the screen, on hard copy output, and by spectral analysis in the red, green and blue bands. Full screen sized images look fairly good, but when enlarged, the scanned image appeared blocky and fuzzy. Hard copy output from the electrostatic plotter produces colors similar to the screen for the demo image, but renders poor color matching with the scanned image. Histograms of each band of the scanned image show a high count at the low end of the curve. These findings confirm that the images are different, and that the differences are not just in …
Date: November 1, 1994
Creator: Benson, J. L.
System: The UNT Digital Library
Thin flexible intercalation anodes (open access)

Thin flexible intercalation anodes

Poly(acrylonitrile) fibers have been pyrolyzed under various conditions to form flexible carbon yarns capable of intercalating lithium ions. These fibers have also been formed into both woven and non woven cloths. Potentiostatic, potentiodynamic and galvanostatic tests have been conducted with these materials in several electrolytes. In some tests, a potential hold was used after each constant current charge and discharge. These tests have shown some of these flexible materials to reversibly intercalate lithium ions to levels that are suitable for use as a practical battery anode.
Date: October 1, 1994
Creator: Levy, S. C.; Cieslak, W. R.; Klassen, S. E. & Lagasse, R. R.
System: The UNT Digital Library
Instrumentation for on-line mountain range displays (open access)

Instrumentation for on-line mountain range displays

A method to obtain and process `mountain range` displays of beam signals is described. A custom-made trigger generator and a digital oscilloscope are used for the data acquisition and the graphical interface package LabVIEW is used to process the data. High resolution displays of wall monitor signals updating every AGS cycle have proven very powerful as a beam diagnostic.
Date: October 1, 1994
Creator: van Asselt, W. K. & Ahrens, L. A.
System: The UNT Digital Library
Phase stability and elastic properties of C15 compounds HfV{sub 2}+Nb (open access)

Phase stability and elastic properties of C15 compounds HfV{sub 2}+Nb

The ternary phase diagram of Hf-V-Nb system has been established and the C15 and C14 Laves phase regions located. The structural stability of the cubic Laves phase HfV{sub 2}+Nb was examined using heat capacity measurements and transmission electron microscopy. It is found that the binary C 15 has a martensitic transformation at 115K and that Nb addition can eliminate the martensitic transformation and stabilize the C15 structure. The elastic properties vs. temperature of the C15 HfV{sub 2}+Nb were studied using the resonant ultrasound technique. It is observed that the shear and Young`s moduli increase abnormally with increasing temperature, the bulk modulus is virtually constant, and the Poisson`s ratio is very high and decreases abnormally with increasing temperature. The elastic properties of the C15 compound can be qualitatively understood using the electronic structure obtained from ab initio calculations. The relation between the phase stability and anomalous elastic properties is discussed based on these results.
Date: October 1, 1994
Creator: Chu, F.; Mitchell, T. E. & Pope, D. P.
System: The UNT Digital Library
Production of high proton fractions from ECR sources by plasma modification (open access)

Production of high proton fractions from ECR sources by plasma modification

A program has been initiated to increase the proton fractions extracted from ECR sources by modifying the atom concentration in the source using minor additives to the plasma. A progress report is given.
Date: September 1, 1994
Creator: Spence, D. & Fink, C. L.
System: The UNT Digital Library
Explosive performance measurements on large, multiple-hole arrays and large masses of conventional explosive (open access)

Explosive performance measurements on large, multiple-hole arrays and large masses of conventional explosive

The COntinuous Reflectometry for Radius vs. Time EXperiment (CORRTEX) system was developed by the Los Alamos National Laboratory for determining the energy released in a nuclear explosion by measuring the position of its shock front as a function of time. The CORRTEX system, fielding techniques, and the methods and software for data reduction and analysis were developed over a 15 year period with hundreds of measurements made on nuclear tests and high explosive experiments. CORRTEX is a compact, portable, fast-sampling, microprocessor-controlled system, based on time domain reflectometry, requiring only a 24 volt power source and a sensing element. Only the sensing element (a length of 50 ohm coaxial cable) is expended during the detonation. In 1979, the CORRTEX system was shown to be ideally suited for chemical explosive performance measurements. Its utility for diagnosing chemical explosives was further demonstrated with successful measurements on large multiple-hole chemical shots in rock quarries and strip mines. Accurate timing of the detonation of sequenced or ripple fired arrays, as well as data characterizing the initiation, explosive performance and detonation anomalies are obtained. This information can serve as the basis for empirical or modeled improvements to blasting operations. A summary of the special CORRTEX features …
Date: November 1, 1994
Creator: McKown, T. O.; Eilers, D. D. & Williams, P. E.
System: The UNT Digital Library
B{sup +} and B{sup 0} mean lifetime measurements (open access)

B{sup +} and B{sup 0} mean lifetime measurements

We review B{sup +} and B{sup 0} mean lifetime measurements, including direct measurements and determination of the lifetime ratio via measurements of the ratios of branching ratios. We present world averages.
Date: August 1994
Creator: DeJongh, Fritz
System: The UNT Digital Library
Debugging the virtual machine (open access)

Debugging the virtual machine

A computer program is really nothing more than a virtual machine built to perform a task. The program`s source code expresses abstract constructs using low level language features. When a virtual machine breaks, it can be very difficult to debug because typical debuggers provide only low level machine implementation in formation to the software engineer. We believe that the debugging task can be simplified by introducing aspects of the abstract design into the source code. We introduce OODIE, an object-oriented language extension that allows programmers to specify a virtual debugging environment which includes the design and abstract data types of the virtual machine.
Date: September 2, 1994
Creator: Miller, P. & Pizzi, R.
System: The UNT Digital Library
LEU {sup 99}Mo target fabrication and testing: Overview, status, and plans (open access)

LEU {sup 99}Mo target fabrication and testing: Overview, status, and plans

As part of the RERTR program, the development of technology to use low-enriched uranium (LEU) for production of the fission product {sup 99}Mo has continued. Progress in fabrication development and out-of-pile thermal testing of targets based on uranium metal foils is summarized. Uranium foil of 125 {mu}m (0.005 in.) thickness has been fabricated. Heat treatments have been developed to provide a random crystal structure, which is required for satisfactory irradiation properties. Two target designs, a tapered thermal expansion type and a split-outer-tube type, are presented. After anionic coating and thermal treatment of prototypical targets, no diffusional or dimensional changes were observed. A formal agreement for cooperation between Argonne National Laboratory (ANL) and the Indonesian National Atomic Energy Agency (BATAN) for irradiation testing is in the final stage of negotiation. The first irradiation tests of targets fabricated by ANL are scheduled to begin during the first half of 1995.
Date: September 1, 1994
Creator: Wiencek, T. C.; Hofman, G. L.; Wood, E. L.; Wu, C. T. & Snelgrove, J. L.
System: The UNT Digital Library