Collection
Office of Scientific & Technical Information Technical Reports
14,165
Texas State Publications
459
Texas Attorney General Opinions
203
Texas Register
112
USGS Topographic Map Collection
106
Congressional Research Service Reports
67
Technical Report Archive and Image Library
64
Office of Technology Assessment
63
Federal Communications Commission Record
27
Advisory Commission on Intergovernmental Relations
13
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Texas Register
112
7.5 Minute Series (Topographic)
59
Texas Motor Vehicle Traffic Accident Summaries
55
30 x 60 Minute Series (Topographic)
44
Texas Parks & Wildlife News
42
Argonne National Laboratory Reports
34
FCC Record
27
Texas Disease Prevention News
24
Fiscal Year 1993
23
73rd Legislature of Texas
18
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15,323 Matching Results
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2D deterministic radiation transport with the discontinuous finite element method
This report provides a complete description of the analytic and discretized equations for 2D deterministic radiation transport. This computational model has been checked against a wide variety of analytic test problems and found to give excellent results. We make extensive use of the discontinuous finite element method.
Date:
November 11, 1993
Creator:
Kershaw, D. & Harte, J.
Object Type:
Report
System:
The UNT Digital Library
3000 vs. 3600 psig NGV on-board storage pressure evaluation
The objective of this evaluation is to perform a comprehensive analysis of two on-board storage pressures or natural gas vehicles. The choice of operating pressure is a fairly complicated one, with implications for a variety of refueling station and vehicle cost issues. Furthermore, the benefit of higher storage pressure operation (increased vehicle driving distance) has been poorly understood, both in precision as well as in value. This study will attempt to combine the relevant factors to aid the industry in developing a framework for deciding the merits of higher operating pressure. This study will not attempt to issue a recommendation on whether the additional cost of 3600 psig storage is justifiable, but will establish a model for decision making.
Date:
December 31, 1993
Creator:
Biederman, R.; Blazek, C.; Freeman, P. & Gauthier, S.
Object Type:
Article
System:
The UNT Digital Library
34th Annual Report
The ACIR Library is composed of publications that study the interactions between different levels of government. This document is an annual report.
Date:
January 1993
Creator:
United States. Advisory Commission on Intergovernmental Relations.
Object Type:
Book
System:
The UNT Digital Library
3D simulations of an electrostatic quadrupole injector
Analysis of the dynamics of a space charge dominated beam in a lattice of electrostatic focusing structures requires a full three-dimensional conic that includes self-consistent space charge fields and the fields from the complex conductor shapes. The existing WARP3d code, a particle simulation code which has been developed for heavy-ion fusion (HIF) applications contains machinery for handling particles in three-dimensional fields. A successive overrelaxation field solver with subgrid-scale placement of boundaries for rounded surface and four-fold symmetry has been added to the code. The electrostatic quadrupole (ESQ) injector for the ILSE accelerator facility being planned at Lawrence Berkeley Laboratory is shown as an application. The issue of concern is possible emittance degradation because the focusing voltages are a significant fraction of the particles` energy and because there are significant nonlinear fields arising from the shapes of the quadrupole structures.
Date:
February 1, 1993
Creator:
Grote, D. P.; Friedman, A. & Yu, S.
Object Type:
Article
System:
The UNT Digital Library
3M Austin concentrating photovoltaic plant two-year performance report, 1992--1993. Final report
The U.S. Department of Energy, the state of Texas, 3M and the City of Austin Electric Utility jointly funded the installation of a nominal 300 kilowatt concentrating solar photovoltaic system above the parking garage of the new 3M facility in Austin. The plants operating performance for the years 1992-1993 are presented.
Date:
December 31, 1993
Creator:
Hoffner, J. & Jaster, P.
Object Type:
Report
System:
The UNT Digital Library
40Ar/39Ar Age Spectra and Total-Fusion Ages of Tektites from Cretaceous-Tertiary Boundary Sedimentary Rocks in the Beloc Formation, Haiti
A report about Haitian tektites at the paleontological K-T boundary along with an Ir abundance anomaly and shocked quartz.
Date:
1993
Creator:
Dalrymple, G. Brent; Izett, Glen A.; Snee, Lawrence W. & Obradovich, John D.
Object Type:
Report
System:
The UNT Digital Library
The 73rd Texas Legislature, Summary of Significant Legislation
This document is comprised of five sections; an overview of major issues; a list of all enrolled bill; sunset legislation; constitutional amendments; and gubernatorial vetoes. The section listing enrolled bills has been expanded this year to include the author/sponsors, relating clauses, and effective dates of the bills." (Foreword).
Date:
June 1993
Creator:
Texas. Legislature. Senate. Research Center.
Object Type:
Report
System:
The Portal to Texas History
Ab initio molecular orbital calculations of molten salt vapor complexes using Gaussian-2 theory: LiAlF{sub 4} and NaAlF{sub 4}
The structures and energies of the molten salt vapor complexes LiAlF{sub 4} and NaAlF{sub 4} are studied using new high level ab initio molecular orbital methods. The structures are determined using Moller-Plesset perturbation theory to second-order and the total energies are determined using a recently introduced modification of Gaussian-2 (G2) theory. The total energies are used to determine relative energies of the corner-, edge-, and face-bridged structures and accurate reaction energies. The results are compared to previous theoretical and experimental studies.
Date:
May 1993
Creator:
Curtiss, L. A.
Object Type:
Article
System:
The UNT Digital Library
Ab initio molecular orbital calculations of molten salt vapor complexes using Gaussian-2 theory: LiAlF[sub 4] and NaAlF[sub 4]
The structures and energies of the molten salt vapor complexes LiAlF[sub 4] and NaAlF[sub 4] are studied using new high level ab initio molecular orbital methods. The structures are determined using Moller-Plesset perturbation theory to second-order and the total energies are determined using a recently introduced modification of Gaussian-2 (G2) theory. The total energies are used to determine relative energies of the corner-, edge-, and face-bridged structures and accurate reaction energies. The results are compared to previous theoretical and experimental studies.
Date:
January 1, 1993
Creator:
Curtiss, L.A.
Object Type:
Article
System:
The UNT Digital Library
Ab initio study of the epitaxial growth of Ge on Si(100) surface
We identify the binding sites for adsorption of a single Ge atom on the Si(100) surface using ab initio total energy calculations. The calculated diffusion barriers are in excellent agreement with experimental estimates. Using a large supercell we resolve the controversy regarding the binding geometry and migration path for the adatom, and investigate the influence of the adatom on the buckling of Si dimers. The adatom induces a buckling defect that is frequently observed using scanning tunneling microscopy (STM); therefore the study of single adatoms may be experimentally accessible.
Date:
November 1, 1993
Creator:
Milman, V.; Pennycook, S. J.; Jesson, D. E.; Payne, M. C. & Stich, I.
Object Type:
Article
System:
The UNT Digital Library
Abandoned Mine Waste Working Group report
The Mine Waste Working Group discussed the nature and possible contributions to the solution of this class of waste problem at length. There was a consensus that the mine waste problem presented some fundamental differences from the other classes of waste addresses by the Develop On-Site Innovative Technologies (DOIT) working groups. Contents of this report are: executive summary; stakeholders address the problems; the mine waste program; current technology development programs; problems and issues that need to be addressed; demonstration projects to test solutions; conclusion-next steps; and appendices.
Date:
December 10, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Abilene
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:100000
Date:
1993
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Abort interlock diagnostic for protection of APS vacuum chamber
The Advanced Photon Source (APS) vacuum system has been designed to be passively safe from bending magnet radiation heating at positron beam currents up to 30 mA. Above this value, certain components may be damaged from vertical beam missteering, although work is proceeding to raise the safe current threshold. Because of this, a system for preventing the misalignment of high power density beams is required. This report details a system for protection from dipole radiation only. Work on a system for ID radiation is continuing.
Date:
January 1, 1993
Creator:
Decker, G.
Object Type:
Article
System:
The UNT Digital Library
Abort interlock diagnostic for protection of APS vacuum chamber
The Advanced Photon Source (APS) vacuum system has been designed to be passively safe from bending magnet radiation heating at positron beam currents up to 30 mA. Above this value, certain components may be damaged from vertical beam missteering, although work is proceeding to raise the safe current threshold. Because of this, a system for preventing the misalignment of high power density beams is required. This report details a system for protection from dipole radiation only. Work on a system for ID radiation is continuing.
Date:
June 1, 1993
Creator:
Decker, G.
Object Type:
Article
System:
The UNT Digital Library
Above Bonneville Passage and Propagation Cost Effectiveness Analysis.
We have developed several models to evaluate the cost-effectiveness of alternative strategies to mitigate hydrosystem impacts on salmon and steelhead, and applied these models to areas of the Columbia River Basin. Our latest application evaluates the cost-effectiveness of proposed strategies that target mainstem survival (e.g., predator control, increases in water velocity) and subbasin propagation (e.g., habitat improvements, screening, hatchery production increases) for chinook salmon and steelhead stocks, in the portion of the Columbia Basin bounded by Bonneville, Chief Joseph, Dworshak, and Hells Canyon darns. At its core the analysis primarily considers financial cost and biological effectiveness, but we have included other attributes which may be of concern to the region.
Date:
May 1, 1993
Creator:
Paulsen, Charles M.; Hyman, Jeffrey B. & Wernstedt, Kris
Object Type:
Report
System:
The UNT Digital Library
Absorption and x-ray measurements from ultra-intense laser-plasma interactions
The interaction of subpicosecond 1.06 mm laser light at intensities up to 10{sup 18} W/cm{sup 2} with dense performed plasmas is investigated by measurements of the absorption of the laser light in the plasma and by measurements of the production of bremsstrahlung x-rays. Absorption measurements are made by collecting the scattered light in an Ulbricht sphere. Light scattered in the backward and specular directions is collected separately. Measurements are presented for both high and low Z targets. X-ray production is measured using a nine channel filter/scintillator spectrometer.
Date:
March 1, 1993
Creator:
Klem, D. E.; Darrow, C.; Lane, S. & Perry, M. D.
Object Type:
Article
System:
The UNT Digital Library
Abstracts and parameter index database for reports pertaining to the unsaturated zone and surface water-ground water interactions at the Idaho National Engineering Laboratory
This report is a product generated by faculty at the University of Idaho in support of research and development projects on Unsaturated Zone Contamination and Transport Processes, and on Surface Water-Groundwater Interactions and Regional Groundwater Flow at the Idaho National Engineering Laboratory. These projects are managed by the State of Idaho`s INEL Oversight Program under a grant from the US Department of Energy. In particular, this report meets project objectives to produce a site-wide summary of hydrological information based on a literature search and review of field, laboratory and modeling studies at INEL, including a cross-referenced index to site-specific physical, chemical, mineralogic, geologic and hydrologic parameters determined from these studies. This report includes abstracts of 149 reports with hydrological information. For reports which focus on hydrological issues, the abstracts are taken directly from those reports; for reports dealing with a variety of issues beside hydrology, the abstracts were generated by the University of Idaho authors concentrating on hydrology-related issues. Each abstract is followed by a ``Data`` section which identifies types of technical information included in a given report, such as information on parameters or chemistry, mineralogy, stream flows, water levels. The ``Data`` section does not include actual values or data.
Date:
May 1, 1993
Creator:
Bloomsburg, G.; Finnie, J.; Horn, D.; King, B. & Liou, J.
Object Type:
Report
System:
The UNT Digital Library
Abstracts of papers presented at the LVIII Cold Spring Harbor Symposium on quantitative Biology: DNA and chromosomes
This volume contains the abstracts of oral and poster presentations made at the LVIII Cold Spring Harbor Symposium on Quantitative Biology entitles DNA & Chromosomes. The meeting was held June 2--June 9, 1993 at Cold Spring Harbor, New York.
Date:
December 31, 1993
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
Abstracts of papers thirty-fourth ORNL/DOE conference on analytical chemistry in energy technology
Less than 100 abstracts are included.
Date:
1993
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
ABSTRACTS: Seventh annual conference on fossil energy materials
Objective of the Advanced Research and Technology Development materials program is to conduct R and D on materials for fossil energy applications (coal processing, coal liquefaction, gasification, heat engines and recovery, combustion systems, fuel cells). Research is aimed at better understanding of materials in fossil energy environments and development of new materials for improvement of plant operations and reliability. Abstracts are given of 37 papers on ceramics/composites, intermetallics (iron aluminides, etc.), and advanced austenitics. (DLC)
Date:
June 1, 1993
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
Ac losses for the self field of an ac transport current with a dc transport current offset in high {Tc} superconducting magnet coils for MagLev application
Although much research has been conducted concerning the losses of high-{Tc} superconductors, very little has concentrated on the self-field losses in an actual magnet arrangement. The coils studied in this work were designed for use as actual magnets in an industrial application. Self field loss measurements were made upon tape-wound 2223 superconducting helix coils. The self-field losses were produced by an AC transport current with a DC transport current offset. Losses were taken for single, double and triple tape windings, giving essentially monofilament, dual, and three filament cases. The losses measured here were varied over a range of AC current values for several different DC values, and over a range of frequencies. The currents were all AC sinusoids with a DC offset. All measurements were made at T = 77K.
Date:
October 1, 1993
Creator:
Koosh, V. F.
Object Type:
Report
System:
The UNT Digital Library
Accelerated cleanup of mixed waste units on the Hanford Site, Richland, Washington
This report provides a status of the expedited response action (ERA) projects currently being implemented at the Hanford Site. A detailed review of the accomplishments to date, the technologies employed, the problems encountered, and an analysis of the lessons learned are included. A total of nine ERAs have been initiated at the Hanford Site and are presented in a case study format with emphasis on the progress being made and the challenges ahead.
Date:
September 1, 1993
Creator:
Patterson, J. K.; Johnson, W. L. & Downey, H. D.
Object Type:
Article
System:
The UNT Digital Library
Accelerated line-by-line calculations for the radiative transfer of trace gases related to climate studies. Progress report No. 1, 15 September 1993--14 September 1994
In the present study we are studying the effects of including carbon dioxide, ozone, methane, and the halocarbons in addition to water vapor in the radiating atmosphere. The study has focused on two principal issues: the effect on the spectral fluxes and cooling rates of carbon dioxide, ozone and the halocarbons at 1990 concentration levels and the change in fluxes and cooling rates as a consequence of the anticipated ten year change in the profiles of these species. For the latter study the water vapor profiles have been taken as invariant in time. The radiative line-by-line calculations using LBLRTM (Line-By-Line Radiative Transfer Model) have been performed for tropical (TRP), mid-latitude winter (MLW) and mid-latitude summer (MLS) model atmospheres. The halocarbons considered in the present study are CCl{sub 4}, CFC-11, CFC-12 and CFC-22. In addition to considering the radiative effects of carbon dioxide at 355 ppM, the assumed current level, we have also obtained results for doubled carbon dioxide at 710 ppM. An important focus of the current research effort is the effect of the ozone depletion profile on atmospheric radiative effects.
Date:
November 15, 1993
Creator:
Clough, S. A.
Object Type:
Report
System:
The UNT Digital Library
Accelerated screening methods for determining chemical and thermal stability of refrigerant-lubricant mixtures, Part 1: Method assessment. Final report
This report presents results of a literature search performed to identify analytical techniques suitable for accelerated screening of chemical and thermal stabilities of different refrigerant/lubricant combinations. Search focused on three areas: Chemical stability data of HFC-134a and other non-chlorine containing refrigerant candidates; chemical stability data of CFC-12, HCFC-22, and other chlorine containing refrigerants; and accelerated thermal analytical techniques. Literature was catalogued and an abstract was written for each journal article or technical report. Several thermal analytical techniques were identified as candidates for development into accelerated screening tests. They are easy to operate, are common to most laboratories, and are expected to produce refrigerant/lubricant stability evaluations which agree with the current stability test ANSI/ASHRAE (American National Standards Institute/American Society of Heating, Refrigerating, and Air-Conditioning Engineers) Standard 97-1989, ``Sealed Glass Tube Method to Test the Chemical Stability of Material for Use Within Refrigerant Systems.`` Initial results of one accelerated thermal analytical candidate, DTA, are presented for CFC-12/mineral oil and HCFC-22/mineral oil combinations. Also described is research which will be performed in Part II to optimize the selected candidate.
Date:
April 1, 1993
Creator:
Kauffman, R.
Object Type:
Report
System:
The UNT Digital Library