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7,548 Matching Results
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Travel-N-Texas Update, Number 29, November 2000
Newsletter of the Texas General Services Commission discussing news and activities of the organization as well as other information related to business travel for state employees.
Date:
November 2000
Creator:
Texas. General Services Commission.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Trends in PET imaging
Positron Emission Tomography (PET) imaging is a well established method for obtaining information on the status of certain organs within the human body or in animals. This paper presents an overview of recent trends PET instrumentation. Significant effort is being expended to develop new PET detector modules, especially those capable of measuring depth of interaction. This is aided by recent advances in scintillator and pixellated photodetector technology. The other significant area of effort is development of special purpose PET cameras (such as for imaging breast cancer or small animals) or cameras that have the ability to image in more than one modality (such as PET / SPECT or PET / X-Ray CT).
Date:
November 1, 2000
Creator:
Moses, William W.
Object Type:
Article
System:
The UNT Digital Library
The two-level helium cycle for maximum transmutation in secure, clean, and safe manner
None
Date:
November 1, 2000
Creator:
Baxter, A.
Object Type:
Article
System:
The UNT Digital Library
A Two-Stage Information-Theoretic Approach to Modeling Landscape-Level Attributes and Maximum Recruitment of Chinook Salmon in the Columbia River Basin.
Many anadromous salmonid stocks in the Pacific Northwest are at their lowest recorded levels, which has raised questions regarding their long-term persistence under current conditions. There are a number of factors, such as freshwater spawning and rearing habitat, that could potentially influence their numbers. Therefore, we used the latest advances in information-theoretic methods in a two-stage modeling process to investigate relationships between landscape-level habitat attributes and maximum recruitment of 25 index stocks of chinook salmon (Oncorhynchus tshawytscha) in the Columbia River basin. Our first-stage model selection results indicated that the Ricker-type, stock recruitment model with a constant Ricker a (i.e., recruits-per-spawner at low numbers of fish) across stocks was the only plausible one given these data, which contrasted with previous unpublished findings. Our second-stage results revealed that maximum recruitment of chinook salmon had a strongly negative relationship with percentage of surrounding subwatersheds categorized as predominantly containing U.S. Forest Service and private moderate-high impact managed forest. That is, our model predicted that average maximum recruitment of chinook salmon would decrease by at least 247 fish for every increase of 33% in surrounding subwatersheds categorized as predominantly containing U.S. Forest Service and privately managed forest. Conversely, mean annual air temperature had a …
Date:
November 1, 2000
Creator:
Thompson, William L. & Lee, Danny C.
Object Type:
Report
System:
The UNT Digital Library
U.N. Peacekeeping: Access to Records Concerning the U.S. Decision-Making Process
A statement of record issued by the General Accounting Office with an abstract that begins "This testimony discusses GAO's need to access to records concerning the administration's process for approving United Nations (U.N.) peacekeeping operations. To complete this study, GAO needs (1) access to all records at the Department of State, the Department of Defense, and the National Security Council that are considered to be relevant to GAO's study, and (2) independent access to these agencies' records for the U.N. peacekeeping operations covered by this study. The copies of the requested documents that GAO received were so heavily redacted that they did not provide any useful information. GAO believes the process used by State and DOD threatens its independent access to records as well as the quality and validity of the study. GAO also believes that the existing process of allowing federal agencies to collect the relevant documents and edit their contents before releasing them to GAO is unacceptable and must change."
Date:
November 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
U1h Superstructure
The U1H Shaft Project is a design build subcontract to supply the U. S. Department of Energy (DOE) a 1,045 ft. deep, 20 ft. diameter, concrete lined shaft for unspecified purposes. The subcontract awarded to Atkinson Construction by Bechtel Nevada to design and construct the shaft for the DOE has been split into phases with portions of the work being released as dictated by available funding. The first portion released included the design for the shaft, permanent hoist, headframe, and collar arrangement. The second release consisted of constructing the shaft collar to a depth of 110 ft., the service entry, utility trenches, and installation of the temporary sinking plant. The temporary sinking plant included the installation of the sinking headframe, the sinking hoist, two deck winches, the shaft form, the sinking work deck, and temporary utilities required to sink the shaft. Both the design and collar construction were completed on schedule. The third release consisted of excavating and lining the shaft to the station depth of approximately 950 feet. Work is currently proceeding on this production sinking phase. At a depth of approximately 600 feet, Atkinson has surpassed production expectation and is more than 3 months ahead of schedule. Atkinson …
Date:
November 2000
Creator:
Sykes, Glen
Object Type:
Article
System:
The UNT Digital Library
Use of a Transition Probability/Markov Approach to Improve Geostatistical of Facies Architecture
Facies may account for the largest permeability contrasts within the reservoir model at the scale relevant to production. Conditional simulation of the spatial distribution of facies is one of the most important components of building a reservoir model. Geostatistical techniques are widely used to produce realistic and geologically plausible realizations of facies architecture. However, there are two stumbling blocks to the traditional indicator variogram-based approaches: (1) intensive data sets are needed to develop models of spatial variability by empirical curve-fitting to sample indicator (cross-) variograms and to implement ''post-processing'' simulation algorithms; and (2) the prevalent ''sequential indicator simulation'' (SIS) methods do not accurately produce patterns of spatial variability for systems with three or more facies (Seifert and Jensen, 1999). This paper demonstrates an alternative transition probability/Markov approach that emphasizes: (1) Conceptual understanding of the parameters of the spatial variability model, so that geologic insight can support and enhance model development when data are sparse. (2) Mathematical rigor, so that the ''coregionalization'' model (including the spatial cross-correlations) obeys probability law. (3) Consideration of spatial cross-correlation, so that juxtapositional tendencies--how frequently one facies tends to occur adjacent to another facies--are honored.
Date:
November 1, 2000
Creator:
Carle, S. F.
Object Type:
Article
System:
The UNT Digital Library
Voice and Data Network of Convergence and the Application of Voice over IP
This paper looks at emerging technologies for converging voice and data networks and telephony transport over a data network using Internet Protocols. Considered are the benefits and drivers for this convergence. The paper describes these new technologies, how they are being used, and their application to Sandia.
Date:
November 1, 2000
Creator:
Eldridge, J. M.
Object Type:
Report
System:
The UNT Digital Library
Winning, November 2000
Pamphlet containing information about Texas Lottery winners, scratch-off prizes, new games, and more.
Date:
November 2000
Creator:
Texas Lottery Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
WITS - WASTE DATA COLLECTION WITH OUR PALMS AT OUR FINGERTIPS
The waste management and environmental compliance group (NMT-7) at the Los Alamos National Laboratory (LANL) has initiated a project to build a computer-based system for tracking inventory, storage and disposal information for hazardous and radioactive waste and contaminated byproducts. This project, the Waste Inventory Tracking System (WITS), will initially be used in TA-55 (which includes the Los Alamos National Laboratory Plutonium Facility) and the Chemical and Metallurgy Research (CMR) building where wastes are generated. The system handles numerous waste types with variation in size, disposal method, and hazard classification including: low level waste such as room trash (compactable waste), SEG waste (non-compactable), and over-sized waste, mixed waste, hazardous and chemical waste, universal waste, and waste containing asbestos and PCB's. WITS is designed to provide up-to-date location, status, content information, radioactivity analyses, and other inventory information for every waste item and container managed by NMT-7. The system will support comprehensive reporting capabilities and cradle-to-grave audit trails. WITS is intended to facilitate handling of waste by NMT-7 staff to help minimize waste disposal costs, ensure compliance with applicable regulations, and standardize waste management methodologies and practices. This paper compares current management practices with revised methodologies supported by WITS. It shows how automating …
Date:
November 1, 2000
Creator:
Martinez, B.
Object Type:
Report
System:
The UNT Digital Library
X-ray magneto-optic KERR effect studies of spring magnet heterostructures.
The complex 3-dimensional magnetization reversal behavior of Sin-Co/Fe exchange spring films is used to test the sensitivity of different resonant soft x-ray magneto-optical Kerr effect (MOKE) measurements to changes in longitudinal and transverse moments within the SOIIFe layer and to changes in these moments in depth within the Fe layer. As in the visible MOKE, changes in longitudinal and net transverse moments are resolved by measuring both Kerr rotation and intensity loops in the near the Fe 2p core resonance. These x-ray MOKE signals measured using linear incident polarization are more directly interpreted in terms of longitudinal and transverse moments than are the same signals measured using elliptical polarization. Varying photon energy near the Fe L3line is shown to be an effective means of resolving distinctly different reversal behavior at the top and bottom of the 20 nm thick Fe layer resulting from the strong exchange coupling at the Sin-Co/Fe interface. Measured x-ray MOKE spectra and signals are in qualitative agreement with those calculated using standard magneto-optical formalisms incorporating interference between different layers and measured helicity-dependent magneto-optical constants for Fe.
Date:
November 1, 2000
Creator:
Kortright, J. B.; Kim, S. K.; Fullerton, E. E.; Jiang, J. S. & Bader, S. D.
Object Type:
Article
System:
The UNT Digital Library
XAFS Study of Ba(II) Adsorption on Na-Montmorillonite Surfaces
None
Date:
November 1, 2000
Creator:
Zhou, Weiqing; Zhang, Pengchu; Sayers, Dale E.; Hesterberg, Dean; Brady, Patrick V. & Arthur, Sara E.
Object Type:
Article
System:
The UNT Digital Library