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1-D Equilibrium Discrete Diffusion Monte Carlo
We present a new hybrid Monte Carlo method for 1-D equilibrium diffusion problems in which the radiation field coexists with matter in local thermodynamic equilibrium. This method, the Equilibrium Discrete Diffusion Monte Carlo (EqDDMC) method, combines Monte Carlo particles with spatially discrete diffusion solutions. We verify the EqDDMC method with computational results from three slab problems. The EqDDMC method represents an incremental step toward applying this hybrid methodology to non-equilibrium diffusion, where it could be simultaneously coupled to Monte Carlo transport.
Date:
August 2000
Creator:
Evans, T. M.; Urbatsch, T. J. & Lichtenstein, H.
Object Type:
Article
System:
The UNT Digital Library
10th Workshop on Crystalline Silicon Solar Cell Materials and Processes: Extended Abstracts and Papers from the Workshop, Copper Mountain Resort; August 14-16, 2000
The 10th Workshop provided a forum for an informal exchange of technical and scientific information between international researchers in the photovoltaic and non-photovoltaic fields. Discussions included the various aspects of impurities and defects in silicon-their properties, the dynamics during device processing, and their application for developing low-cost processes for manufacturing high-efficiency silicon solar cells. Sessions and panel discussions also reviewed thin-film crystalline-silicon PV, advanced cell structures, new processes and process characterization techniques, and future manufacturing requirements to meet the ambitious expansion goals described in the recently released US PV Industry Roadmap. The Workshop also provided an excellent opportunity for researchers in private industry and at universities to recognize a mutual need for future collaborative research. The three-day workshop consisted of presentations by invited speakers, followed by discussion sessions. In addition, there was two poster sessions presenting the latest research and development results. The subjects discussed included: solar cell processing, light-induced degradation, gettering and passivation, crystalline silicon growth, thin-film silicon solar cells, and impurities and defects. Two special sessions featured at this workshop: advanced metallization and interconnections, and characterization methods.
Date:
August 11, 2000
Creator:
Sopori, B. L.; Gee, J.; Kalejs, J.; Saitoh, R.; Stavola, M.; Swanson, D. et al.
Object Type:
Article
System:
The UNT Digital Library
1999 Gordon Research Conference on Atmospheric Chemistry
The Gordon Research Conference (GRC) on Atmospheric Chemistry was held at Salve Regina University in Newport, Rhode Island, June 13-18, 1999. The conference was well attended with 151 participants. The attendees represented the spectrum of endeavor in this field coming from academia, industry, and government laboratories, both US and foreign scientists, senior researchers, young investigators, and students.
Date:
August 1, 2000
Creator:
Storm, C.
Object Type:
Article
System:
The UNT Digital Library
20th International Congress of Theoretical and Applied Mechanics, ICTAM2000
The 20th International Congress of Theoretical and Applied Mechanics, ICTAM2000, was held in Chicago, IL, from August 27 - September 2, 2000. It was 32 years since the last of these congresses had been held in USA. A record number of researchers in the mechanical engineering sciences attended and presented their work. The Congress provided an opportunity for the US mechanics community to act as international hosts. Several universities, professional societies, private foundations and individuals, and Federal agencies provided financial support for the Congress.
Date:
August 27, 2000
Creator:
Hassan, Aref
Object Type:
Article
System:
The UNT Digital Library
21st century energy sustainability -- nuclear's role.
None
Date:
August 7, 2000
Creator:
Wade, D. C.
Object Type:
Article
System:
The UNT Digital Library
Ab-Initio Studies of ALSB(001) Adatom Behavior and Reconstruction
None
Date:
August 29, 2000
Creator:
Modine, Normand A.; Kim, Hanchul & Kaxiras, E.
Object Type:
Article
System:
The UNT Digital Library
ABC Jesus
Photograph of artist, Amorette V. Garza-Morales, looking at her artwork entitled ABC Jesus. It hangs on a wall featuring multi-colored crucifixes on a red wall.
Date:
2000-08~
Creator:
Mexic-Arte Museum (Austin, Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
Acceptance Test Procedure for New Pumping Instrumentation & Control Skid V
This Acceptance Test Procedure (ATP) provides for the inspection and testing of the new Pumping Instrumentation and Control (PIC) skid designated as ''V''. The ATP will be performed after the construction of the PIC skid in the fabrication shop.
Date:
August 14, 2000
Creator:
Koch, M. R.
Object Type:
Report
System:
The UNT Digital Library
ACRES: An Efficient Method for First-Principles Electronic Structure Calculations of Complex Systems
The authors discuss their new implementation of the Adaptive Coordinate Real-space Electronic Structure (ACRES) method for studying the atomic and electronic structure of infinite periodic as well as finite systems, based on density functional theory. This improved version aims at making the method widely applicable and efficient, using high performance Fortran on parallel architectures. The scaling of various parts of an ACRES calculation is analyzed and compared to that of plane-wave based methods. The new developments that lead to enhanced performance, and their parallel implementation, are presented in detail. They illustrate the application of ACRES to the study of elemental crystalline solids, molecules and complex crystalline materials, such as blue bronze and zeolites.
Date:
August 29, 2000
Creator:
Waghmare, R. V.; Kim, Hanchul; Park, I. J.; Modine, Normand A.; Maragakis, P. & Kaxiras, Efthimios
Object Type:
Article
System:
The UNT Digital Library
The ACT external HEPA push-through filter assembly
None
Date:
August 7, 2000
Creator:
Frigo, A. A.; Wiedmeyer, S. G.; Preuss, D. E.; Bielick, E. F. & Malecha, R. F.
Object Type:
Article
System:
The UNT Digital Library
Active Waste Materials Corrosion and Decontamination Tests
Stainless steel alloys, 304L and 316L, were corrosion tested in representative radioactive samples of three actual Hanford tank waste solutions (Tanks AW-101, C-104, AN-107). Both the 304L and 316L exhibited good corrosion performance when immersed in boiling waste solutions. The maximum general corrosion rate was 0.015 mm/y (0.60 mils per year). Generally, the 304L had a slightly higher rate than the 316L. No localized attack was observed after 122 days of testing in the liquid phase, liquid/vapor phase, or vapor phase. Radioactive plate-out decontamination tests indicated that a 24-hour exposure to 1 {und M} HNO{sub 3} could remove about 99% of the radioactive components in the metal film when exposed to the C-104 and AN-107 solutions. The decontamination results are less certain for the AW-101 solution, since the initial contamination readings exceeded the capacity of the meter used for this test.
Date:
August 15, 2000
Creator:
Danielson, MJ; Elmore, MR & Pitman, SG
Object Type:
Report
System:
The UNT Digital Library
Adaptive optics for improved retinal surgery and diagnostics
It is now possible to field a compact adaptive optics (AO) system on a surgical microscope for use in retinal diagnostics and surgery. Recent developments in integrated circuit technology and optical photonics have led to the capability of building an AO system that is compact and significantly less expensive than traditional AO systems. It is foreseen that such an AO system can be integrated into a surgical microscope while maintaining a package size of a lunchbox. A prototype device can be developed in a manner that lends itself well to large-scale manufacturing.
Date:
August 21, 2000
Creator:
Humayun, M. S.; Sadda, S. R.; Thompson, C. A.; Olivier, S. S. & Kartz, M. W.
Object Type:
Report
System:
The UNT Digital Library
Additional Information Related to Analysis of the Administration's Proposal to Ensure Solvency of the United Mine Workers of America Combined Benefit Fund
Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the United Mine Workers of America Combined Benefit Fund."
Date:
August 31, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Adherence and Haemagglutination of Moraxella Catarrhalis.
Access:
Use of this item is restricted to the UNT Community
M. catarrhalis is a gram-negative diplococci frequently associated with infections of the upper respiratory tract. During the past decade, some preliminary studies have attempted to elucidate mechanisms of adherence and haemagglutination of M. catarrhalis. These studies have reported, in many cases, inconsistent results. There are two purposes of this research. First, identify mechanisms that may potentially be associated with the adherence and haemagglutination of M. catarrhalis. Second, suggest research directions that may be fruitful in clarifying these mechanisms.
Date:
August 2000
Creator:
Kosterman, Edward, III
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Adolescent Stress Response to a Naturalistic Driving Stressor
The proposed study examined the role of anxiety and risk-taking in driving performance in adolescents. In addition to examining the sample as a whole, gender differences were assessed given earlier reports from our laboratory and others indicating that males and females differ with respect to risky behaviors to driving performance and anxiety. Adolescents' subjective and physiological responses to a driving simulator task were assessed. Anxiety was measured via self report and salivary cortisol. Participants provided a baseline saliva sample and 3 post-task samples for cortisol analysis. Subjective anxiety scores were obtained at both baseline and following the driving stressor. Information concerning impulsivity, as well as other psychological constructs was also collected at baseline. Unlike the pilot study, there were no relationships (with or without respect to gender) between salivary cortisol and both self-reported anxiety (state and trait) or impulsively measures for this sample. These results suggest that this group of adolescents may not have been anxious about the driving task. This discrepancy may stem from error introduced by the smaller sample size obtained from the initial findings or to other factors remaining outside the parameters of the current study. The task did, however, induce a slight hypothalamic pituitary adrenal (HPA) …
Date:
August 2000
Creator:
Wingo, Mary
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Advanced Energy Efficiency Design Strategies In Retail Buildings
This paper presents two US retail building projects that were designed and constructed using the energy design process. These buildings, the BigHorn Center in Silverthorne, Colorado, and the Zion National Park Visitor Center in Springdale, Utah, were both completed and occupied during the spring of 2000.
Date:
August 17, 2000
Creator:
Hayter, S. & Torcellini, P.
Object Type:
Article
System:
The UNT Digital Library
Advanced Industrial Materials (AIM) Program Compilation of Project Summaries and Significant Accomplishments FY 1999
For the past 10 years the Advanced Industrial Materials (AIM) has supported development of new and improved materials to enable U.S. industry to improve energy efficiency, increase productivity, and reduce waste. It has been a National Laboratory based program, with work currently under way at Oak Ridge National Laboratory, Los Alamos National Laboratory, and Sandia National Laboratories, in collaboration with industrial and university partners. With the advent of the Industries of the Future (IOF) strategy within the Office of Industrial Technologies (OIT) and the scheduled completion of the Continuous Fiber Ceramic Composites (CFCC) Program in FY 2002, an integrated materials program is being developed in OIT. So this represents the last summary of AIM research and development. The new program, Industrial Materials for the Future (IMF), will be competitive in operation, with solicitations for proposals for development of materials in accordance with the IOF Technology Roadmaps, followed by merit review and funding of the best proposals. Industry will take the lead in ''industry-specific'' research and development, in cooperation with National Laboratories, as needed. National Laboratories and universities will take the lead in maintaining a base technology program, for the purpose of maintaining a continuing flow of new materials technologies. The …
Date:
August 8, 2000
Creator:
Angelini, P
Object Type:
Report
System:
The UNT Digital Library
Advanced Techniques for Reservoir Simulation and Modeling of Non-Conventional Wells
This project targets the development of (1) advanced reservoir simulation techniques for modeling non-conventional wells; (2) improved techniques for computing well productivity (for use in reservoir engineering calculations) and well index (for use in simulation models), including the effects of wellbore flow; and (3) accurate approaches to account for heterogeneity in the near-well region.
Date:
August 28, 2000
Creator:
Durlofsky, Louis J.
Object Type:
Report
System:
The UNT Digital Library
The Age, Volume 23, Number 8, August 2000
Monthly publication containing information related to Chambers County, Texas, including current events of the Chambers County Historical Commission, the Wallisville Heritage Park, and the Chambers County historical and genealogical societies; reprinted newspaper articles about county events and citizens; and historical news and records.
Date:
August 2000
Creator:
Wallisville Heritage Park (Organization)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[Agreement for Marcus Fellowship: School of Visual Arts, UNT]
The documented agreement between an esteemed individual and the School of Visual Arts, Division of Art Education and Art History, solidifying their status as a Marcus Fellow. This comprehensive document outlines the terms, expectations, and benefits associated with the fellowship program.
Date:
August 18, 2000
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
AIR DISPERSION MODELING AT THE WASTE ISOLATION PILOT PLANT
One concern at the Waste Isolation Pilot Plant (WIPP) is the amount of alpha-emitting radionuclides or hazardous chemicals that can become airborne at the facility and reach the Exclusive Use Area boundary as the result of a release from the Waste Handling Building (WHB) or from the underground during waste emplacement operations. The WIPP Safety Analysis Report (SAR), WIPP RCRA Permit, and WIPP Emergency Preparedness Hazards Assessments include air dispersion calculations to address this issue. Meteorological conditions at the WIPP facility will dictate direction, speed, and dilution of a contaminant plume of respirable material due to chronic releases or during an accident. Due to the paucity of meteorological information at the WIPP site prior to September 1996, the Department of Energy (DOE) reports had to rely largely on unqualified climatic data from the site and neighboring Carlsbad, which is situated approximately 40 km (26 miles) to the west of the site. This report examines the validity of the DOE air dispersion calculations using new meteorological data measured and collected at the WIPP site since September 1996. The air dispersion calculations in this report include both chronic and acute releases. Chronic release calculations were conducted with the EPA-approved code, CAP88PC and …
Date:
August 1, 2000
Creator:
Rucker, D. F.
Object Type:
Report
System:
The UNT Digital Library
Air Force Depot Maintenance: Budgeting Difficulties and Operational Inefficiencies
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO provided information on the financial and management issues related to the depot maintenance activity group of the Air Force Working Capital Fund."
Date:
August 15, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 125, No. 7, Ed. 1 Thursday, August 24, 2000
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
August 24, 2000
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 125, No. 10, Ed. 1 Thursday, August 3, 2000
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
August 3, 2000
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History