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Adaptive signed distance transform for curves with guaranteed error bounds
We present an adaptive signed distance transform algorithm for curves in the plane. The algorithm provides guaranteed error bounds with a selective refinement approach. The domain over which the signed distance function is desired is adaptive triangulated and piecewise discontinuous linear approximations are constructed within each triangle. The resulting transform performs work only were requested and does not rely on a preset sampling rate or other constraints.
Date:
December 4, 2000
Creator:
Laney, D A; Duchaineau, M A & Max, N L
Object Type:
Article
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 101, No. 228, Ed. 1 Monday, December 4, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 4, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Sun (Alvin, Tex.), Vol. 109, No. 98, Ed. 1 Monday, December 4, 2000
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 4, 2000
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Basic Energy Sciences at NREL
NREL's Center for Basic Sciences performs fundamental research for DOE's Office of Science. Our mission is to provide fundamental knowledge in the basic sciences and engineering that will underpin new and improved renewable energy technologies.
Date:
December 4, 2000
Creator:
Moon, S.
Object Type:
Book
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 8, Ed. 1 Monday, December 4, 2000
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 4, 2000
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Benchmark the Fuel Cost of Steam Generation
BestPractices Steam tip sheet regarding ways to assess steam system efficiency. To determine the effective cost of steam, use a combined heat and power simulation model that includes all the significant effects.
Date:
December 4, 2000
Creator:
Papar, R.
Object Type:
Book
System:
The UNT Digital Library
Cancer detection using NIR elastic light scattering and tissue fluorescence imaging
Near infrared imaging using elastic light scattering and tissue fluorescence under long-wavelength laser excitation are explored for cancer detection. Various types of normal and malignant human tissue samples were utilized in this investigation.
Date:
December 4, 2000
Creator:
Demos, S G; Staggs, M; Radousky, H B; Gandour-Edwards, R & deVere White, R
Object Type:
Article
System:
The UNT Digital Library
Ceramic waste form modeling in the Yucca Mountain engineered barrier system
As part of the spent fuel treatment program at Argonne National Laboratory, CWF degradation and radionuclide release modeling is being carried out to support the qualification of the CWF for disposal in the proposed repository at Yucca Mountain. Transition-state theory applied to the dissolution of aluminosilicate minerals provides a mechanistic basis for the dissolution model, while model parameters are obtained by experimental measurements. Performance assessment calculations carried out using the current model indicate that the CWF will perform in a similar manner to defense high-level waste glass, suggesting the CWF could be characterized by the HLW glass model in the Site Recommendation or License Application for Yucca Mountain.
Date:
December 4, 2000
Creator:
Fanning, T. H.; Morris, E. E.; Wigeland, R. A.; Ebert, W. L.; Lewis, M. A. & Morss, L. R.
Object Type:
Article
System:
The UNT Digital Library
Commuter simulation of lithium-ion battery performance in hybrid electric vehicles.
In this study, a lithium-ion battery was designed for a hybrid electric vehicle, and the design was tested by a computer program that simulates driving of a vehicle on test cycles. The results showed that the performance goals that have been set for such batteries by the Partnership for a New Generation of Vehicles are appropriate. The study also indicated, however, that the heat generation rate in the battery is high, and that the compact lithium-ion battery would probably require cooling by a dielectric liquid for operation under conditions of vigorous vehicle driving.
Date:
December 4, 2000
Creator:
Nelson, P. A.; Henriksen, G. L. & Amine, K.
Object Type:
Article
System:
The UNT Digital Library
Comparison of Module Performance Characterization Methods for Energy Production
This report compares the two methods of determining the performance of PV modules. The methods translate module performance characterized in a laboratory to actual or reference conditions using slightly different approaches. The accuracy of both methods is compared for both hourly and daily energy production over a year of data recorded at NREL in Golden, CO. The comparison of the two methods will be presented for five different PV module technologies: multicrystalline silicon (mc-Si), dual-junction amorphous silicon (a-Si/a-Si:Ge), triple-junction amorphous silicon (a-Si/a-Si/a-Si:Ge), cadmium telluride (CdTe), and copper indium diselenide (CIGSS).
Date:
December 4, 2000
Creator:
Kroposki, B.; Marion, W.; King, D.; Boyson, W. & Kratochvil, J.
Object Type:
Report
System:
The UNT Digital Library
Critical heat flux and boiling heat transfer to water in a 3-mm-diameter horizontal tube.
Boiling of the coolant in an engine, by design or by circumstance, is limited by the critical heat flux phenomenon. As a first step in providing relevant engine design information, this study experimentally addressed both rate of boiling heat transfer and conditions at the critical point of water in a horizontal tube of 2.98 mm inside diameter and 0.9144 m heated length. Experiments were performed at system pressure of 203 kPa, mass fluxes in range of 50 to 200 kg/m{sup z}s, and inlet temperatures in range of ambient to 80 C. Experimental results and comparisons with predictive correlations are presented.
Date:
December 4, 2000
Creator:
Yu, W.; Wambsganss, M. W.; Hull, J. R. & France, D. M.
Object Type:
Article
System:
The UNT Digital Library
Daily Journal (Perry, Okla.), Vol. 107, No. 237, Ed. 1 Monday, December 4, 2000
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 4, 2000
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
DART adelanta para establecer su flotilla de combustible no contaminante
News release about DART's purchase of more liquefied natural gas buses.
Date:
December 4, 2000
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
DART Takes Next Steps in Clean Fuels Fleet Program
News release about DART's purchase of more liquefied natural gas buses.
Date:
December 4, 2000
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
Deaerators in Industrial Steam Systems
BestPractices Steam tip sheet regarding the use of deaerators in industrial steam systems.
Date:
December 4, 2000
Creator:
Papar, R.
Object Type:
Book
System:
The UNT Digital Library
Determine the Cost of Compressed Air for Your Plant
BestPractices Program tip sheet discussing a method for determining the cost of compressed air at industrial plants.
Date:
December 4, 2000
Creator:
Papar, R. & Wogsland, J.
Object Type:
Book
System:
The UNT Digital Library
Environmental Protection Agency: FY2001 Budget Issues
The request for state and local wastewater and drinking water capital needs was a key issue. The request of $2.91 billion for State and Tribal Assistance Grants, which fund these needs, was about one-half billion less than in FY2000. The House passed $3.18 billion, the Senate $3.32 billion, and the conferees $3.62 billion. The request included $800 million for Clean Water State Revolving Funds, $550 million less than in FY2000. The House passed $1.20 billion, the Senate $1.35 billion and the conferees $1.35 billion. Conferees approved the $825 million requested for Drinking Water State Revolving Funds. Congress denied the Administration's request for a new Clean Air Partnership program. EPA requested $100 million for Mexican border water projects and $15 million for State of Alaska projects. Conferees approved $75 million and $35 million respectively. For state and tribal administrative grants, the conferees approved roughly the requested amount of $1.0 billion.
Date:
December 4, 2000
Creator:
Lee, Martin R.
Object Type:
Report
System:
The UNT Digital Library
La Estación Cityplace abre el 18 de diciembre
News release about the opening of DART's Cityplace Station, a subway station.
Date:
December 4, 2000
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, December 4, 2000
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 4, 2000
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Groundwater Flow and Transport Calculations Supporting the Immobilized Low-Activity Waste Disposal Facility Performance Assessment
This report summarizes the Hanford Site-Wide Groundwater Model and its application to the Immobilized Low-Activity Waste (ILAW) Disposal Facility Performance Assessment (PA). The site-wide model and supporting local-scale models are used to evaluate impacts from the transport of contaminants at a hypothetical well 100 m downgradient of the disposal facilities and to evaluate regional flow conditions and transport from the ILAW disposal facilities to the Columbia River. These models were used to well-intercept factors (WIFs) or dilution factors from a given areal flux of a hypothetical contaminant released to the unconfined aquifer from the ILAW disposal facilities for two waste-disposal options: 1) a remote-handled trench concept and 2) a concrete-vault concept. The WIF is defined as the ratio of the concentration at a well location in the aquifer to the concentration of infiltrating water entering the aquifer. These WIFs are being used in conjunction with calculations of released contaminant fluxes through the vadose zone to estimate potential impacts from radiological and hazardous chemical contaminants within the ILAW disposal facility at compliance points.
Date:
December 4, 2000
Creator:
Bergeron, Marcel P. & Wurstner, Signe K.
Object Type:
Report
System:
The UNT Digital Library
Groundwater Flow and Transport Calculations Supporting the Immobilized Low-Activity Waste Disposal Facility Performance Assessment
This report summarizes the Hanford Site-Wide Groundwater Model and its application to the Immobilized Low-Activity Waste (ILAW) Disposal Facility Performance Assessment (PA). The site-wide model and supporting local-scale models are used to evaluate impacts from the transport of contaminants at a hypothetical well 100 m downgradient of the disposal facilities and to evaluate regional flow conditions and transport from the ILAW disposal facilities to the Columbia River. These models were used to well-intercept factors (WIFs) or dilution factors from a given areal flux of a hypothetical contaminant released to the unconfined aquifer from the ILAW disposal facilities for two waste-disposal options: (1) a remote-handled trench concept and (2) a concrete-vault concept. These WIFs are being used in conjunction with calculations of released contaminant fluxes through the vadose zone to estimate potential impacts from radiological and hazardous chemical contaminants within the ILAW disposal facility at compliance points.
Date:
December 4, 2000
Creator:
Bergeron, Marcel P & Wurstner, Signe K
Object Type:
Report
System:
The UNT Digital Library
Honeywell Modular Automation System Computer Software Documentation
The purpose of this Computer Software Document (CSWD) is to provide configuration control of the Honeywell Modular Automation System (MAS) in use at the Plutonium Finishing Plant (PFP). This CSWD describes hardware and PFP developed software for control of stabilization furnaces. The Honeywell software can generate configuration reports for the developed control software. These reports are described in the following section and are attached as addendum's. This plan applies to PFP Engineering Manager, Thermal Stabilization Cognizant Engineers, and the Shift Technical Advisors responsible for the Honeywell MAS software/hardware and administration of the Honeywell System.
Date:
December 4, 2000
Creator:
STUBBS, A.M.
Object Type:
Report
System:
The UNT Digital Library
Hydride precipitation crack propagation in zircaloy cladding during a decreasing temperature history
An assessment of safety, design, and cost tradeoff issues for short (ten to fifty years) and longer (fifty to hundreds of years) interim dry storage of spent nuclear fuel in Zircaloy rods shall address potential failures of the Zircaloy cladding caused by the precipitation response of zirconium hydride platelets. If such assessment analyses are to be done rigorously, they will be necessarily complex because the precipitation response of zirconium hydride platelets is a stochastic functional of hydrogen concentration, temperature, stress, fabrication defect/texture structures, and flaw sizes of the cladding. Thus, there are, and probably always will be, zirhydride questions to analytically and experimentally resolve concerning the consistency, the completeness, and the certainty of models, data, the initial and the time-dependent boundary conditions. Some resolution of these questions will be required in order to have a defensible preference and tradeoffs decision analysis for assessing risks and consequences of the potential zirhydride induced cladding failures during dry storage time intervals. In the following brief discussion, one of these questions is posed as a consequence of an anomaly described in data reproducibility that was reported in the results of tests for hydrogen induced delayed cracking. The testing anomaly consisted of observing a significant …
Date:
December 4, 2000
Creator:
Stout, R B
Object Type:
Article
System:
The UNT Digital Library
Install Removable Insulation on Uninsulated Valves and Fittings
BestPractices Steam tip sheet regarding ways to improve plant steam system efficiency by installing removable insulation on uninsulated valves and fittings.
Date:
December 4, 2000
Creator:
Papar, R.
Object Type:
Book
System:
The UNT Digital Library