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UNT Libraries Government Documents Department
248
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50
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18
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10
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5
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5
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Office of Scientific & Technical Information Technical Reports
194
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115
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10
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Year
Month
Day
Language
Transient Analysis for the Multimechanism-Deformation Parameters of Several Domal Salts
Use of Gulf Coast salt domes for construction of very large storage caverns by solution mining has grown significantly in the last several decades. In fact, a nationally important Strategic Petroleum Reserve (SPR) storage occurs in large cavern arrays in some of these domes. Although caverns have been operated economically for these many years, these caverns have a range of relatively poorly understood behaviors, involving creep closure fluid loss and damage from salt falls. It is certainly possible to postulate that many of these behaviors stem from geomechanical or deformational aspects of the salt response. As a result, a method of correlating the cavern response to mechanical creep behavior as determined in the laboratory could be of considerable importance. Recently, detailed study of the creep response of domal salts has cast some insight into the influence of different salt origins on cavern behavior. The study used a simple graphical analysis of the limited non-steady state data to give a bound, or an approach to steady state, as an estimate of the steady state behavior of a given domal salt. This permitted the analysis of sparse creep databases for domal salts. It appears that a shortcoming of the steady state analysis …
Date:
August 16, 1999
Creator:
Munson, Darrell E.
Object Type:
Article
System:
The UNT Digital Library
Geologic and Engineering Characterization of East Ford Field, Reeves County, Texas
The objective of this Class III project is to demonstrate that detailed reservoir characterization of slope and basin clastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost-effective way to recover a higher percentage of the original oil in place through geologically based field development. The project focused on reservoir characterization of the East Ford unit, a representative Delaware Mountain Group field that produces from the upper Bell Canyon Formation (Ramsey Sandstone). The field, discovered in 1960, is operated by Oral Petco, Inc., as the East Ford unit: it contained an estimated 18.4 million barrels (MMbbl) of original oil in place.
Date:
August 16, 1999
Creator:
Dutton, Shirley P.; Flanders, William A.; Guzman, Jose I. & Zirczy, Helena
Object Type:
Report
System:
The UNT Digital Library
Reproducibility Data on SUMMiT
SUMMiT (Sandia Ultra-planar Multi-level MEMS Technology) at the Sandia National Laboratories' MDL (Microelectronics Development Laboratory) is a standardized MEMS (Microelectromechanical Systems) technology that allows designers to fabricate concept prototypes. This technology provides four polysilicon layers plus three sacrificial oxide layers (with the third oxide layer being planarized) to enable fabrication of complex mechanical systems-on-a-chip. Quantified reproducibility of the SUMMiT process is important for process engineers as well as designers. Summary statistics for critical MEMS technology parameters such as film thickness, line width, and sheet resistance will be reported for the SUMMiT process. Additionally, data from Van der Pauw test structures will be presented. Data on film thickness, film uniformity and critical dimensions of etched line widths are collected from both process and monitor wafers during manufacturing using film thickness metrology tools and SEM tools. A standardized diagnostic module is included in each SWiT run to obtain post-processing parametric data to monitor run-to-run reproducibility such as Van der Pauw structures for measuring sheet resistance. This characterization of the SUMMiT process enables design for manufacturability in the SUMMiT technology.
Date:
July 16, 1999
Creator:
Irwin, Lloyd; Jakubczak, Jay; Limary, Siv; McBrayer, John; Montague, Stephen; Smith, James et al.
Object Type:
Article
System:
The UNT Digital Library
Medical applications of ultrashort pulse lasers
The characteristics of the ultrashort pulse laser (USPL, < 1 ps) ablation of biological tissues are investigated both theoretically and experimentally. Effective USPL parameters for minimal damage and high ablation rates are discussed.
Date:
March 16, 1999
Creator:
DaSilva, L. B.; Feit, M. D.; Kim, B. M. & Rubenchil, A. M.
Object Type:
Article
System:
The UNT Digital Library
Supplemental Data on PCB Paint at the U.S. Department of Energy Savannah River Site
The purpose of this document is to provide EPA Headquarters with additional analytical data on the presence of PCBs in painted surfaces.
Date:
July 16, 1999
Creator:
Lowry, N.J.
Object Type:
Report
System:
The UNT Digital Library
Cast Polycrystalline Photovoltaic Module Manufacturing Technology Improvements; Final Subcontract Report, 8 December 1993-30 April 1998
This report summarizes work performed by Solarex, A Business Unit of Amoco/Enron Solar, under this subcontract. Among the accomplishments during the program are the following: Converting all of the production casting stations to increase ingot size, operating them at equivalent yields and cell efficiencies, and thus doubling the casting capacity at a 20% lower cost than the cost of new equipment. Developing a wire-saw process and transferring the process to production; as a result, more than 80% of wafering is now done using wire saws, at higher yields and lower costs than achieved on the internal diameter saws. Developing an aluminum paste back-surface field (BSF) process to increase cell efficiency by 5%; researchers also designed, procured, and transferred to manufacturing a fully automated printing system to produce the BSF cells. Fabricating 15.2-cm by 15.2-cm polycrystalline silicon solar cells and building modules using these cells. Modifying the module assembly area to increase capacity by a factor of three. Implementing a single-layer Tedlar backsheet that reduced backsheet cost by $0.50/ft2. Selecting, testing, and qualifying a low-cost (< $1.00 per module) electrical termination system. Qualifying the structure and adhesive system for mounting frameless modules and using the system to build several large arrays.
Date:
June 16, 1999
Creator:
Wohlgemuth, J.
Object Type:
Report
System:
The UNT Digital Library
Thermal Analysis of LANL Ion Exchange Column
This document reports results from an ion exchange column heat transfer analysis requested by Los Alamos National Laboratory (LANL). The object of the analysis is to demonstrate that the decay heat from the Pu-238 will not cause resin bed temperatures to increase to a level where the resin significantly degrades.
Date:
June 16, 1999
Creator:
Laurinat, J.E.
Object Type:
Report
System:
The UNT Digital Library
CSER 99-007 Criticality Safety Evaluation Report for PFP Glovebox HA-21I Muffle Furnace Operation for Plutonium Stabilization
Criticality Safety Evaluation Report for operation of PFP Glovebox HA-21I muffle furnace for plutonium stabilization. Glovebox limits are specified for processing metal and oxide fissile materials.
Date:
December 16, 1999
Creator:
Dobbin, K. D.
Object Type:
Report
System:
The UNT Digital Library
Cold Vacuum Drying (CVD) Facility Technical Safety Requirements
The Technical Safety Requirements (TSRs) for the Cold Vacuum Drying Facility define acceptable conditions, safe boundaries, bases thereof, and management or administrative controls required to ensure safe operation. Controls required for public safety, significant defense-in-depth, significant worker safety, and for maintaining radiological and toxicological consequences below risk evaluation guidelines are included.
Date:
December 16, 1999
Creator:
Krahn, D. E.
Object Type:
Report
System:
The UNT Digital Library
Plutonium Finishing Plant (PFP) Standby Power System Commercial Grade Item (CGI) Critical Characteristics
PEP's Standby Power System consists of the diesel generators, the generator control system, Rm 308 UPS, switchgear batteries, and the electrical equipment used to distribute this power. Due to the nature of the equipment and its use throughout general industry, the majority of the system falls within the CGI definition HNF-PRO-268. ''Control of Purchased Items and Services'' and HNF-PRO-1819, ''PHMC Engineering Requirements'' require that the critical characteristics of CGI-procured equipment be established in an engineering document prior to placing the order. HNF-5043 establishes these critical characteristics for the Standby Power System. Equipment will be added to the list as required to support future CGI procurements.
Date:
September 16, 1999
Creator:
BUSCH, M.S.
Object Type:
Report
System:
The UNT Digital Library
Spent Nuclear Fuel (SNF) Cold Vacuum Drying (CVD) Facility Standby Power Diesel Generator Formal Design Review Report
None
Date:
November 16, 1999
Creator:
Singh, G.
Object Type:
Report
System:
The UNT Digital Library
The MACHO Project Sample of Galactic Bulge High-Amplitude Scuti Stars: Pulsation Behavior and Stellar Properties
We have detected 90 objects with periods and lightcurve structure similar to those of field {delta} Scuti stars, using the Massive Compact Halo Object (MACHO) Project database of Galactic bulge photometry. If we assume similar extinction values for all candidates and absolute magnitudes similar to those of other field high-amplitude {delta} Scuti stars (HADS), the majority of these objects lie in or near the Galactic bulge. At least two of these objects are likely foreground {delta} Scuti stars, one of which may be an evolved nonradial pulsator, similar to other evolved, disk-population {delta} Scuti stars. We have analyzed the light curves of these objects and find that they are similar to the light curves of field {delta} Scuti stars and the {delta} Scuti stars found by the Optical Gravitational Lens Experiment (OGLE). However, the amplitude distribution of these sources lies between those of low- and high-amplitude {delta} Scuti stars, which suggests that they may be an intermediate population. We have found nine double-mode HADS with frequency ratios ranging from 0.75 to 0.79, four probable double- and multiple-mode objects, and another four objects with marginal detections of secondary modes. The low frequencies (5-14 cycles d{sup -1}) and the observed period ratios …
Date:
November 16, 1999
Creator:
Bennett, D. P.; Cook, K. H.; Freeman, K. C.; Geha, M.; Griest, K.; Lehner, M. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Waste Retrieval Sluicing System Campaign Number 3 Solids Volume Transferred Calculation
Waste Retrieval Sluicing System (WRSS) operations at tank 241-C-106 began on Wednesday, November 18,1998. The purpose of this system is to retrieve and transfer the high-heat sludge from the tank for storage in double-shell tank 241-AY-102, thereby resolving the high-heat safety issue for the tank, and to demonstrate modernized past-practice retrieval technology for single-shell tank waste. Performance Agreement (PA) TWR 1.2.2, C-106 Sluicing, was established by the Department of Energy, Office of River Protection (ORP) for achieving completion of sluicing retrieval of waste from tank 241-C-106 by September 30,1999. This level of sludge removal is defined in the PA as either removal of approximately 72 inches of sludge or removal of 172,000 gallons of sludge (approximately 62 inches) and less than 6,000 gallons (approximately 2 inches) of sludge removal per 12 hour sluice batch for three consecutive batches. Preliminary calculations of the volume of tank 241-C-106 sludge removed as of September 29, 1999 were provided to ORP documenting completion of PA TWR 1.2.2 (Allen 1999a). The purpose of this calculation is to document the final sludge volume removed from tank 241-C-106 up through September 30, 1999. Additionally, the results of an extra batch completed October 6, 1999 is included to …
Date:
November 16, 1999
Creator:
CAROTHERS, K.G.
Object Type:
Report
System:
The UNT Digital Library
Test and Evaluation Plan for Project W-314 Tank Farm Restoration and Safe Operations
This Test and Evaluation Plan (TEP) defines the objectives, roles, responsibilities, and overall strategy for conducting test and evaluation activities for the W-314 Project.
Date:
July 16, 1999
Creator:
HAMMERS, J.S.
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 24, Number 29, Pages 5269-5608, July 16, 1999
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
July 16, 1999
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[News Clip: JPS Latest]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
November 16, 1999, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Riverside History]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 16, 1999
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Oral History Interview with E. Benjamin Dunn, November 16, 1999
Access:
Use of this item is restricted to the UNT Community
Interview with E. Benjamin Dunn, a Army WWII veteran and POW from Gorham, Illinois, who was captured by the Japanese on Java with the 2nd Battalion, 131st Field Artillery (the "Lost Battalion.") Dunn discusses training in the Army, transfer to 2-131 and deployment to the Pacific, the fall of Java and being captured, experiences in internment in Batavia and later Changi Prison Camp in Singapore, building the Burma-Thailand Death Railway, and liberation.
Date:
November 16, 1999
Creator:
Marcello, Ronald E. & Dunn, E. Benjamin
Object Type:
Book
System:
The UNT Digital Library
Crop Insurance: USDA's Progress in Expanding Insurance for Specialty Crops
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO reviewed the availability of the Department of Agriculture's (USDA) federal crop insurance for specialty crops, focusing on: (1) USDA's recent progress in expanding coverage to specialty crops; (2) the new marketing practices insurance companies have introduced for specialty crops and the potential advantages and disadvantages of the practices, including their effect on producers' participation; and (3) the potential effect on participation by producers in the catastrophic crop insurance program if they were charged higher fees."
Date:
April 16, 1999
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Defense Transportation: 89th Airlift Wing Executive Branch Policies Improved but Reimbursement Issues Remain
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO updated its previous report on the policies governing the use of the 89th Airlift Wing Aircraft, focusing on whether: (1) changes to executive branch policies since 1992 addressed the intent of GAO's previous recommendations; and (2) reimbursements have been made for the use of the 89th Airlift Wing aircraft."
Date:
August 16, 1999
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Financial Audit: Capitol Preservation Fund's Fiscal Years 1998 and 1997 Financial Statements
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO audited the Capitol Preservation Fund for the fiscal years ended September 30, 1998, and 1997."
Date:
August 16, 1999
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Luminescence Properties of ScPO{sub 4} Single Crystals
Flux-grown ScPO{sub 4} single crystals exhibit a number of luminescence bands in their x-ray-excited luminescence spectra - including sharp lines arising from rare-earth elements plus a number of broad bands at 5.6 cV, 4.4 eV, and 3 eV. The band at 5.6 eV was attributed to a self-trapped exciton (STE) [l], and it could be excited at 7 eV and higher energies. This luminescence is strongly polarized (P = 70 %) along the optical axes of the crystal and exhibits a kinetic decay time constant that varies from several ns at room temperature to {approximately}10 {micro}s at 60 K and up to {approximately}1 ms at 10 K. It is assumed that the STE is localized on the SC ions. The band at 3 eV can be excited in the range of the ScPO{sub 4} crystal transparency (decay time = 3 to 4 {micro}s.) This band is attributed to a lead impurity that creates different luminescence centers. At high temperatures, the band at 4.4 eV is dominant in the x-ray-excited TSL and afterglow spectra. Its intensity increases with irradiation time beginning at zero at the initial irradiation time. The 4.4 eV band does not appear in a fast process under a …
Date:
August 16, 1999
Creator:
Boatner, L. A. & Trukhin, A. N.
Object Type:
Article
System:
The UNT Digital Library
Microfabricated Gas Phase Chemical Analysis Systems
A portable, autonomous, hand-held chemical laboratory ({micro}ChemLab{trademark}) is being developed for trace detection (ppb) of chemical warfare (CW) agents and explosives in real-world environments containing high concentrations of interfering compounds. Microfabrication is utilized to provide miniature, low-power components that are characterized by rapid, sensitive and selective response. Sensitivity and selectivity are enhanced using two parallel analysis channels, each containing the sequential connection of a front-end sample collector/concentrator, a gas chromatographic (GC) separator, and a surface acoustic wave (SAW) detector. Component design and fabrication and system performance are described.
Date:
September 16, 1999
Creator:
FRYE-MASON,GREGORY CHARLES; HELLER,EDWIN J.; HIETALA,VINCENT M.; KOTTENSTETTE,RICHARD; LEWIS,PATRICK R.; MANGINELL,RONALD P. et al.
Object Type:
Article
System:
The UNT Digital Library
Investigation of Sodium Distribution in Phosphate Glasses Using Spin-Echo {sup 23}Na NMR
The spatial arrangement of sodium cations for a series of sodium phosphate glasses, xNa{sub 2}O(100-x)P{sub 2}O{sub 5} (x<55), were investigated using {sup 23}Na spin-echo NMR spectroscopy. The spin-echo decay rate is a function of the Na-Na homonuclear dipolar coupling and is related to the spatial proximity of neighboring Na nuclei. The spin-echo decay rate in these sodium phosphate glasses increases non-linearly with higher sodium number density, and thus provides a measure of the Na-Na extended range order. The results of these {sup 23}Na NMR experiments are discussed within the context of several structural models, including a decimated crystal lattice model, cubic dilation lattice model, a hard sphere (HS) random distribution model and a pair-wise cluster hard sphere model. While the experimental {sup 23}Na spin-echo M{sub 2} are described adequately by both the decimated lattice and the random HS model, it is demonstrated that the slight non-linear behavior of M{sub 2} as a function of sodium number density is more correctly described by the random distribution in the HS model. At low sodium number densities the experimental M{sub 2} is inconsistent with models incorporating Na-Na clustering. The ability to distinguish between Na-Na clusters and non-clustered distributions becomes more difficult at higher …
Date:
September 16, 1999
Creator:
ALAM, TODD M.; BOYLE, TIMOTHY J.; BROW, RICHARD K.; CLICK, CAROL C.; CONZONE, SAM; McLAUGHLIN, JAY et al.
Object Type:
Article
System:
The UNT Digital Library