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Physical characterization of magmatic liquids. [Ultrasonic and Brillouin Scattering Studies of Natural and Synthetic Silicates and Oxides]

Description: This report describes a research project that was conducted from August 15, 1985 to February 28, 1992. The project was based on the ultrasonic studies of natural and synthetic silicate melts, and the study of Brillouin scattering of synthetic silicates and oxides. Measurements of the compressional wave velocity and attenuation can be established using the ultrasonic methods. Temperature dependences of silicates can be established by the Brillouin scattering. (MB)
Date: June 5, 1992
Creator: Manghnani, M.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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H4LM Graphite

Description: A commercial graphite useful in nuclear reactor construction is described. A survey of all currently available sources on chemical and physical properties was made and the information listed. Some data on cost and available sizes are also included. (auth)
Date: July 5, 1962
Creator: Merryman, R. G.; Wagner, P. & MacMillan, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High beta and second stability region transport and stability analysis

Description: This document describes ideal and resistive MHD studies of high-beta plasmas and of the second stability region. Significant progress is reported on the resistive stability properties of high beta poloidal supershot'' discharges. For these studies initial profiles were taken from the TRANSP code which is used extensively to analyze experimental data. When an ad hoc method of removing the finite pressure stabilization of tearing modes is implemented it is shown that there is substantial agreemen… more
Date: September 5, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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In-Home Performance of Exempt Pellet Stoves in Medford, Oregon.

Description: Pellet stoves that are considered exempt'' operate at an air-to-fuel ratio in excess of 35:1. They therefore qualify for exemption from the emissions certification process. A primary goal of this project was to determine how a sample of such stoves, operated in homes, would perform compared to their certified cousins,'' which were evaluated the previous year. In-home performance data documenting emissions from exempt stoves and net delivered efficiencies was particularly desired. This project e… more
Date: July 5, 1991
Creator: Barnett, Stockton G. & Fields, Paula G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of photovoltaic mechanisms in polycrystalline thin-film solar cells. Interim technical report, November 1, 1980-July 31, 1981

Description: Effort is reported on measurement technique development to assess the utility of Deep-Level Transient Spectroscopy (DLTS) methods in characterizing polycrystalline silicon that was deliberately doped with Ti during growth. Difficulties encountered with lateral DLTS measurements are discussed. In this approach, modulation of the grain boundary, double-depletion region produces the entire DLTS signal. Major effort has been applied in grain boundary characterization and control. The most significa… more
Date: March 5, 1982
Creator: Temofonte, T. A.; Szedon, J. R. & O'Keeffe, T. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ARM tropical pacific experiment (ATPEX): Role of cloud, water vapor and convection feedbacks in the coupled ocean/atmosphere system

Description: We have initiated studies that include radiation model validation, improved treatment of the three-dimensional structure of cloud-radiation interactions, and sensitivity runs that will unravel the role of cloud-convection-radiation interactions in the Pacific Sear Surface Temperatures and the overlying Walker and Hadley circulation. The research program is divided into three phases: (1) radiation, (2) cloud parameterization issues; (3) feedback and ocean-atmosphere interactions.
Date: March 5, 1992
Creator: Ramanathan, V. & Barnett, T.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Readily implemented enhanced sinusoid detection in noise

Description: Significant efforts have been devoted, spanning many years, to the problem of sinusoid detection in noise. Many of these efforts have produced superb, yet complex, algorithms which may be difficult to use for a wide segment of the Digital Signal Processing (DSP) community. This paper presents a simple, easily implemented and high effective method which solves this problem. This method severely degrades non-sinusoidal noise while leaving the embedded sinusoid(s) relatively undisturbed. The algor… more
Date: March 5, 1992
Creator: Lindsay, K.V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Powerplant Productivity. Improvement Study: current practices in Illinois utilities towards powerplant productivity. Final report, Project 1, Task 1

Description: Efforts of this task indicate that powerplant productivity is a complex issue that has to take into account economic factors, equipment limitations, and system-loading characteristics as well as external constraints such as regulatory requirements. Among the specific findings are: (1) utilities in Illinois use the industry-wide measures of performance such as capacity factor, availability factor, forced outage rates etc.; equivalent availability as a measure is not in common practice; (2) sever… more
Date: April 5, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mechanisms of defect production and atomic mixing in high energy displacement cascades: A molecular dynamics study

Description: We have performed molecular dynamics computer simulation studies of displacement cascades in Cu at low temperature. For 25 keV recoils we observe the splitting of a cascade into subcascades and show that cascades in Cu may lead to the formation of vacancy and interstitial dislocation loops. We discuss a new mechanism of defect production based on the observation of interstitial prismatic dislocation loop punching from cascades at 10 K. We also show that below the subcascade threshold, atomic mi… more
Date: June 5, 1991
Creator: Diaz de la Rubia, T. & Guinan, M.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ductile-Brittle Transition Temperature testing of tungsten using the three-point bend test

Description: Three-point bend tests were performed to determine the Ductile-Brittle Transition Temperatures (DBTTs) of forged and chemical vapor deposition (CVD) tungsten. Testing was performed under quasi-static conditions at temperatures between 23{degrees}C and 450{degrees}C using a forced-air environmental chamber. Load-displacement data from the three-point bend tests indicated that the constitutive behavior of the materials tested varied considerably. Finite element modeling of the three-point bend te… more
Date: March 5, 1991
Creator: Lassila, D.H.; Magness, F. & Freeman, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Powerplant Productivity Improvement Study: benefits of improved powerplant reliability. Final report, Project 2, Task 2

Description: A summary of total cumulative fuel consumption differences by fuel type through 1990 for four improvement scenarios is presented for Commonwealth Edison Company (CE) and for Illinois Power Company (IP). In all scenarios, liquid-fuel consumption is reduced. Generation is shifted to the coal and/or nuclear units for which improved availability has been assumed. For a 2% improvement in both planned (POR) and forced outage rates (FOR), a total of more than 16 million barrels of No. 6 oil will have … more
Date: June 5, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of doping on hybridization gapped materials

Description: Doping studies are presented on three materials exhibiting hybridization gaps: Ce{sub 3}Bi{sub 4}Pt{sub 3}, U{sub 3}Sb{sub 4}Pt{sub 3}, and CeRhSb. In the case of trivalent La, Y, or Lu substituting for Ce or U, there is a suppression of the low temperature gap and an increase in the electronic specific heat, {gamma}. In the case of tetravalent Th substitutions for U there is no change in {gamma} and in the case of tetravalent Zr substitution for Ce in CeRhSb, there is an enhanced semiconductor… more
Date: June 5, 1991
Creator: Canfield, P. C.; Thompson, J. D.; Hundley, M. F.; Lacerda, A. & Fisk, Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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(Restriction of virus infection by plants: Annual report, 1986)

Description: This research concerns the strong resistance, or even immunity, against a specific virus that is exhibited by one or a few lines of a plant species, in contrast to the general susceptibility of most lines of that species. The contrast between the reactions to virus inoculation of different lines of one species implies that a single gene or a very few genes may mediate the resistance or immunity. The prospects for isolating, studying and transferring such a gene should be good for a system with … more
Date: December 5, 1986
Creator: Bruening, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cedar Project---Original goals and progress to date

Description: This report describes: Cedar System Hardware; Compiler and Software Issues on Memory Management; Operating Systems; Compilers; and Multiprocessor Performance on Algorithms and Applications.
Date: September 5, 1991
Creator: Cybenko, G.; Kuck, D.; Padua, D. & Gallopoulos, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A computer system for access to distributed genome mapping data

Description: Development of a computer system for access to distributed genome mapping data is continuing. This effort is to develop software which accesses multiple databases and retrieves data which contain information useful for accelerating mapping human chromosomes. For example, the molecular sequence databases (GenBank, EMBL Data Library, PIR, SwissProt) which contain data required for the development of oligonucleotides for probing DNA as well as for extracting data for primer pair development for PC… more
Date: February 5, 1992
Creator: Marr, T.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrochemical cell having cyclindircal electrode elements

Description: A secondary, high temperature electrochemical cell especially adapted for lithium alloy negative electrodes, transition metal chalcogenide positive electrodes and alkali metal halide or alkaline earth metal halide electrolyte is disclosed. The cell is held within an elongated cylindrical container in which one of the active materials is filled around the outside surfaces of a pluraity of perforate tubular current collectors along the length of the container. Each of the current collector tubes … more
Date: March 5, 1981
Creator: Nelson, P.A. & Shimotake, H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Nuclear reactor fuel-assembly duct-tube-to-handling-socket attachment system. [LMFBR]

Description: A reusable system is described for removably attaching the upper end of a nuclear reactor duct tube to the lower end of a nuclear reactor fuel assembly handling socket. A transition ring, fixed to the duct tube's upper end, has an interior-threaded section with a first locking hole segment. An adaptor ring, fixed to the handling socket's lower end has an outside-threaded section with a second locking hole segment. The inside and outside threaded sections match and can be joined so that the firs… more
Date: March 5, 1981
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Reactor Operations Management Plan

Description: The K-Reactor last operated in April 1988. At that time, K-Reactor was one of three operating reactors at the Savannah River Site (SRS). Following an incident in P-Reactor in August 1988, it was decided to discontinue SRS reactor operation and conduct an extensive program to upgrade operating practices and plant hardware prior to restart of any of the reactors. The K-reactor was the first of three reactors scheduled to resume production. At the present time, it is the only reactor with planned … more
Date: December 5, 1991
Creator: Rice, P.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CHEMICAL SAFETY: ASKING THE RIGHT QUESTIONS

Description: Recent reports have shown that, despite efforts to the contrary, chemical accidents continue to occur at an unacceptable rate and there is no evidence that this rate is decreasing. Based on this observation, one can conclude that previous analyses have not accurately identified and implemented appropriate fixes to eliminate identified root causes for chemical events. Based on this, it is time to reevaluate chemical accident data with a fresh eye and determine (a) what corrective actions have al… more
Date: August 5, 2008
Creator: Simmons, F
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Compound-Nucleus Formation Following Direct Interactions to Highly-Excited Final States

Description: When direct reactions populate highly excited, unbound configurations in the residual nucleus, the nucleus may further evolve into a compound nucleus. Alternatively, the residual system may decay by emitting particles into the continuum. Understanding the relative weights of these two processes as a function of the angular momentum and parity deposited in the nucleus is important for the surrogate-reaction technique. A particularly interesting case is compound-nucleus formation via the (d, p) r… more
Date: February 5, 2008
Creator: Dietrich, F S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Power Systems Development Facility Gasification Test Run TC07

Description: This report discusses Test Campaign TC07 of the Kellogg Brown & Root, Inc. (KBR) Transport Reactor train with a Siemens Westinghouse Power Corporation (Siemens Westinghouse) particle filter system at the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama. The Transport Reactor is an advanced circulating fluidized-bed reactor designed to operate as either a combustor or a gasifier using a particulate control device (PCD). The Transport Reactor was operated as a pressurized… more
Date: April 5, 2002
Creator: Southern Company Services
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transition energy correlations in the three-body continuum of Borromean halo nuclei

Description: Energy correlations in transitions from the bound state to the three-body continuum of Borromean halo nuclei are considered. A core+n+n three-body cluster model which reproduces experimentally known properties of {sup 6}He and {sup 11}Li has been used to study low-lying resonances and soft modes. The analysis of the correlated responses in {sup 6}He shows that in the case of the narrow three-body 2{sub 1}{sup +} resonance the transition energy correlations are the same as in the intrinsic corre… more
Date: June 5, 2007
Creator: Danilin, B V; Vaagen, J S; Rogde, T; Ershov, S N; Thompson, I J & Zhukov, M V
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Abstract: Contaminant Travel Times From the Nevada Test Site to Yucca Mountain: Sensitivity to Porosity

Description: Yucca Mountain (YM), Nevada, has been proposed by the U.S. Department of Energy as a geologic repository for spent nuclear fuel and high-level radioactive waste. In this study, we investigate the potential for groundwater advective pathways from underground nuclear testing areas on the Nevada Test Site (NTS) to the YM area by estimating the timeframe for advective travel and its uncertainty resulting from porosity value uncertainty for hydrogeologic units (HGUs) in the region. We perform sensit… more
Date: September 5, 2008
Creator: Pohlmann, Karl F.; Zhu, Jianting; Chapman, Jenny B.; Russell, Charles E.; Carroll, Rosemary W. H. & Shafer, David S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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