1,263 Matching Results

Search Results

Results: 1 - 24 next
open access

Catalytic hydrogenation of carbon monoxide

Description: This project is focused on developing strategies to accomplish the reduction and hydrogenation of carbon monoxide to produce organic oxygenates at mild conditions. Our approaches to this issue are based on the recognition that rhodium macrocycles have unusually favorable thermodynamic values for producing a series of intermediate implicated in the catalytic hydrogenation of CO. Observations of metalloformyl complexes produced by reactions of H{sub 2} and CO, and reductive coupling of CO to form… more
Date: December 1, 1992
Creator: Wayland, B.B.
Partner: UNT Libraries Government Documents Department
open access

Users Guide and Tutorial for PC-GenoGraphics: Version 1

Description: PC-GenoGraphics is a visual database/query facility designed for reasoning with genomic data. Data are represented to reflect variously accurate notions of the location of their sites, etc., along the length of the genome. Sequence data are efficiently stored and queried via a rather versatile language so that entire sequences of organisms will be treatable as they emerge. Other classes of information, such as function descriptions, are stored in a relational form, and joint queries relating th… more
Date: December 1992
Creator: Hagstrom, Ray; Overbeek, Ross & Price, Morgan
Partner: UNT Libraries Government Documents Department
open access

A Test Implementation of the MPI Draft Message-Passing Standard

Description: Message passing is a common method for programming parallel computers. The lack of a standard has significantly impeded the development of portable software libraries for these machines. Recently, an ad-hoc committee was formed to develop a standard for message-passing software for parallel computers. This group first met in April 1992 at a workshop sponsored in part by the Center for Research on Parallel Computation (CRPC). Four of the attendees at that meeting produced a draft standard, hence… more
Date: December 1992
Creator: Gropp, William & Lusk, Ewing L.
Partner: UNT Libraries Government Documents Department
open access

Toward a Methodology for Complexity Management

Description: This report focuses on the Battle Management/Command, Control, and Communication (BM/C³) element of the Global Protection Against Limited Strike (GPALS) system. The approach is based on the development and validation of a generic BM/C³ model. Central to the approach is the tenet that the design is divided into multiple layers. The critical functions make up the bottom layer, where trust is established and significant design effort is required.
Date: December 1992
Creator: Chisholm, G. H.
Partner: UNT Libraries Government Documents Department
open access

Supplementation in the Columbia Basin : Summary Report Series : Final Report.

Description: This progress report broadly defines the scope of supplementation plans and activities in the Columbia Basin. It provides the foundation for more detailed analysis of supplementation in subsequent reports in this series. Topics included in this report are: definition of supplementation, project diversity, objectives and performance standards, uncertainties and theory. Since this is a progress report, the content is subject to modification with new information. The supplementation theory will co… more
Date: December 1, 1992
Creator: United States. Bonneville Power Administration.
Partner: UNT Libraries Government Documents Department
open access

Libby/Hungry Horse Dams Wildlife Mitigation : Montana Wildlife Habitat Protection: Final Report.

Description: The purpose of this project was to develop and obtain information necessary to evaluate and undertake specific wildlife habitat protection/enhancement actions in northwest Montana as outlined in the Columbia River Basin Fish and Wildlife Program. Three waterfowl projects were evaluated between September 1989 and June 1990. Weaver's Slough project involved the proposed acquisition of 200 acres of irrigated farmland and a donated conservation easement on an additional 213 acres. The proposal incl… more
Date: December 1, 1992
Creator: Wood, Marilyn
Partner: UNT Libraries Government Documents Department
open access

Planning under uncertainty solving large-scale stochastic linear programs

Description: For many practical problems, solutions obtained from deterministic models are unsatisfactory because they fail to hedge against certain contingencies that may occur in the future. Stochastic models address this shortcoming, but up to recently seemed to be intractable due to their size. Recent advances both in solution algorithms and in computer technology now allow us to solve important and general classes of practical stochastic problems. We show how large-scale stochastic linear programs can … more
Date: December 1, 1992
Creator: Infanger, G.
Partner: UNT Libraries Government Documents Department
open access

The inverse problem'' to the evaluation of magnetic fields

Description: In the design of superconducting magnet elements, such as may be required to guide and focus ions in a particle accelerator, one frequently premises some particular current distribution and then proceeds to compute the consequent magnetic field through use of the laws of Biot and Savart or of Ampere. When working in this manner one of course may need to revise frequently the postulated current distribution before arriving at a resulting magnetic field of acceptable field quality. It therefore i… more
Date: December 4, 1992
Creator: Caspi, S.; Helm, M.; Laslett, L.J. & Brady, V.
Partner: UNT Libraries Government Documents Department
open access

Phase 1 involvement for potential stakeholders of the VOC-Arid Integrated Demonstration

Description: This report describes Phase I of a three-phased study to support evaluation of new cleanup technologies for federal facilities. It directly supports the Volatile Organic Compounds (VOC)-Arid Site Integrated Demonstration (VOC-Arid ID) being conducted at the Hanford Site. The purpose of the activity is to develop and demonstrate new technologies for cleaning up carbon tetrachloride and other VOCs in soils and groundwater. The institutional assessment task of the VOC-Arid ID, which is being perfo… more
Date: December 1, 1992
Creator: McCabe, G. H.
Partner: UNT Libraries Government Documents Department
open access

Limits on m = 2, n = 1 error field induced locked mode instability in TPX with typical sources of poloidal field coil error field and a prototype correction coil, C-coil''

Description: Irregularities in the winding or alignment of poloidal or toroidal magnetic field coils in tokamaks produce resonant low m, n = 1 static error fields. Otherwise stable discharges can become nonlinearly unstable, and locked modes can occur with subsequent disruption when subjected to modest m = 2, n = 1 external perturbations. Using both theory and the results of error field/locked mode experiments on DIII-D and other tokamaks, the critical m = 2, n = 1 applied error field for locked mode instab… more
Date: December 1, 1992
Creator: La Haye, R. J.
Partner: UNT Libraries Government Documents Department
open access

Analysis of the impacts of energy conservation codes in new single-family homes

Description: Within the 50 states some form of federal code or standard for energy conservation in new building construction is typically incorporated into state and local codes. Two of these codes, the Model Energy Code (MEC) and the proposed ASHRAE standard 90.2P are of special importance to the residential data base developed by the Gas Research Institute (GRI) because they influence thermal requirements and have either been recently updated or will be revised in 1992. In this study, we evaluate the impa… more
Date: December 1, 1992
Creator: Ritschard, R. L.; Hanford, J. W. & Sezgen, A. O.
Partner: UNT Libraries Government Documents Department
open access

Characteristics of identifying linear dynamic models from impulse response data using Prony analysis

Description: The purpose of the study was to investigate the characteristics of fitting linear dynamic models to the impulse response of oscillatory dynamic systems using Prony analysis. Many dynamic systems exhibit oscillatory responses with multiple modes of oscillations. Although the underlying dynamics of such systems are often nonlinear, it is frequently possible and very useful to represent the system operating about some set point with a linear model. Derivation of such linear models can be done usin… more
Date: December 1, 1992
Creator: Trudnowski, D.J.
Partner: UNT Libraries Government Documents Department
open access

Plasma transport in mixed magnetic topologies

Description: A simple model is introduced to illustrate some features concerning anomalous transport associated with magnetic turbulence. For magnetic topologies that are described as bands of stochasticity separated by regions with good flux surfaces, the transport coefficients deviate significantly from those describing completely stochastic magnetic fields. It is possible to have the electron heat diffusivity exceed a runaway electron diffusion coefficient, despite the existence of widespread magnetic st… more
Date: December 1, 1992
Creator: Hegna, C. C. & Callen, J. D.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Bonneville's 1988 and 1989 Residential Weatherization Program: A Northwest study of program dynamics

Description: This study continues the series of evaluations of the Bonneville Power Administration's long-term Residential Weatherization Program (RWP) by examining the energy saved by its 1988 and 1989 participants. The sample of participants for this study was drawn from 10 utilities covering the region's three climate zones. Six of these utilities were included in the 1988 RWP evaluation, and eight of them were included in the 1989 RWP evaluation. This study analyzes data on 356 participating households … more
Date: December 1, 1992
Creator: Brown, M.A. & White, D.L.
Partner: UNT Libraries Government Documents Department
open access

Results of analyses of fur samples from the San Joaquin Kit Fox and associated soil and water samples from the Naval Petroleum Reserve No. 1, Tupman, California

Description: The purpose of this study was to determine whether analysis of the elemental content of fur from San Joaquin kit foxes (Vulpes macrotis mutica) and of water and soil from kit fox habitats could be used to make inferences concerning the cause of an observed decline in the kit fox population on Naval Petroleum Reserve No. 1 (NPR-1). Fur samples that had been collected previously from NPR-1, another oil field (NPR-2), and two sites with no oil development were subjected to neutron activation analy… more
Date: December 1, 1992
Creator: Suter, G. W. II; Rosen, A. E.; Beauchamp, J. J. (Oak Ridge National Lab., TN (United States)) & Kato, T. T. (EG and G Energy Measurements, Inc., Tupman, CA (United States))
Partner: UNT Libraries Government Documents Department
open access

Schedule Optimization Study, Hanford RI/FS Program

Description: A Schedule Optimization Study (SOS) of the US Department of Energy (DOE) Hanford Site Remedial Investigation/Feasibility Study (RI/FS) Program was conducted by an independent team of professionals from other federal agencies and the private sector experienced in environmental restoration. This team spent two weeks at Hanford in September 1992 examining the reasons for the lengthy RI/FS process at Hanford and developing recommendations to expedite the process. The need for the study arose out of… more
Date: December 1, 1992
Partner: UNT Libraries Government Documents Department
open access

Integrated Verification Experiment data collected as part of the Los Alamos National Laboratory's Source Region Program

Description: The summary report by Tom Weaver gives the overall background for the series of IVE (Integrated Verification Experiment) experiments including information on the full set of measurements made. This appendix presents details of the infrasound data for the and discusses certain aspects of a few special experiments. Prior to FY90, the emphasis of the Infrasound Program was on underground nuclear test (UGT) detection and yield estimation. During this time the Infrasound Program was a separate progr… more
Date: December 1, 1992
Creator: Whitaker, R.W. & Noel, S.D.
Partner: UNT Libraries Government Documents Department
open access

Clean option: An alternative strategy for Hanford Tank Waste Remediation

Description: Plans for remediation of the Hanford underground storage tanks are currently undergoing reevaluation. As part of this process, many options are being considered for the Tank Waste Remediation System (MRS). The clean option'' described here proposes an aggressive waste processing strategy to achieve the three ma or objectives: Greatly reduce the volume of high-level waste (HLW) to lessen demands on geologic repository space; decrease by several orders of magnitude the amount of radioactivity and… more
Date: December 1, 1992
Creator: Straalsund, J. L.; Swanson, J. L.; Baker, E. G.; Jones, E. O.; Kuhn, W. L. & Holmes, J. J.
Partner: UNT Libraries Government Documents Department
open access

Sol-gel preparation of ion-conducting ceramics for use in thin films. [LaSrCoO[sub 3]; SrCeY[sub x]O[sub 3]]

Description: A metal alkoxide sol-gel solution suitable for depositing a thin film of La[sub 0.6]Sr[sub 0.4]CoO[sub 3] on a porous substrate has been developed; such films should be useful in fuel cell electrode and oxygen separation membrane manufacture. Crack-free films have been deposited on both dense and porous substrates by dip-coating and spin-coating techniques followed by a heat treatment in air. Fourier transform infrared spectroscopy was used to determine the chemical structure of metal alkoxide … more
Date: December 1, 1992
Creator: Steinhauser, M.I.
Partner: UNT Libraries Government Documents Department
open access

Solubilization of trace organics in block copolymer micelles for environmental separation using membrane extraction principles

Description: The solubilization of a range of polycyclic aromatic hydrocarbons in block copolymer micelles has been studied as a function of polymer composition, architecture, and temperature. Micelle formation is favored at high temperatures, leading to significant enhancements in solubilization capacity. At low temperatures, however, micelles do not form and the solubilization capacity of the block copolymer solution for the organics is low; this provides a convenient method for the regeneration of micell… more
Date: December 1, 1992
Creator: Hatton, T. A.
Partner: UNT Libraries Government Documents Department
open access

Monitoring conservative retrofits in single family buildings

Description: This study has provided detailed before-and-after information on the ambient and comfort conditions in nine single family buildings, and on the energy consumption of those buildings, for one or more energy conservation retrofits. The data were recorded in such a manner that as well as being able to determine the savings from the retrofits and the influence these retrofits have on the comfort conditions of the residence, the effects of the retrofits on time-of-day usage are also determinable. Th… more
Date: December 6, 1992
Creator: Richardson, C.S.
Partner: UNT Libraries Government Documents Department
open access

Hadronic production of J/[psi] at large [chi][sub F] in 800 GeV p+Cu and p+Be collisions

Description: The differential cross-section d[sigma]/dx[sub F] for J/[psi] production in 800 GeV proton-nucleus collisions has been measured in the kinematic range 0.30 [le] x[sub F] [le] 0.95 and x[sub F] [lt] p[perpendicular] [lt] 5 GeV through the decay mode J/[psi] [yields] [mu][sup +][mu][sup [minus]]. The nuclear dependence of J/[psi] production over this range was measured using copper and beryllium targets. The differential cross sections are in good agreement with the predictions of the symbolical … more
Date: December 1, 1992
Creator: Kowitt, M.S.
Partner: UNT Libraries Government Documents Department
open access

Maintaining the uranium resources data system and assessing the 1991 US uranium potential resources

Description: The Energy Information Administration's (EIA) Uranium Resource Assessment Data (URAD) System contains information on potential resources (undiscovered) of uranium in the United States. The purpose of this report is: (1) to describe the work carried out to maintain and update the URAD system; (2) to assess the 1991 U.S. uranium potential resources in various cost categories; and (3) to describe the progress that has been made to automate the generation of the assessment reports and their subsequ… more
Date: December 31, 1992
Creator: McCammon, R. B. (Geological Survey, Reston, VA (United States)); Finch, W. I.; Grundy, W. D. & Pierson, C. T. (Geological Survey, Denver, CO (United States))
Partner: UNT Libraries Government Documents Department
open access

Tritium permeation model for plasma facing components

Description: This report documents the development of a simplified one-dimensional tritium permeation and retention model. The model makes use of the same physical mechanisms as more sophisticated, time-transient codes such as implantation, recombination, diffusion, trapping and thermal gradient effects. It takes advantage of a number of simplifications and approximations to solve the steady-state problem and then provides interpolating functions to make estimates of intermediate states based on the steady-… more
Date: December 1, 1992
Creator: Longhurst, G.R.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen