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109
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58
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31
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Dynamic Impact Analysis of Bagless Transfer System 3013 Can in Drops at Various Inclination Angles
The purpose of this analysis is to provide rational judgment for the most pernicious impact angle of dropping. A numerical simulation method, finite element analysis, is adopted for this study. The general-purpose finite element analysis code, ABAQUS(R) [HKS, 1998], facilitates the numerical computation. The geometrical finite element modeling is developed with the software PATRAN(R) [MSC, 1999]. The finite element code ABAQUS(R)has been verified according to the QA plans.
Date:
February 22, 2001
Creator:
Gong, C.
Object Type:
Article
System:
The UNT Digital Library
Degradation and Failure Characteristics of NPP Containment Protective Coating Systems
A research program to investigate the performance and potential for debris formation of Service Level I coating systems used in nuclear power plant containment is being performed at the Savannah River Technology Center. The research activities are aligned to address phenomena important to cause coating disbondment as identified by the Industry Coatings Expert Panel. The period of interest for performance covers the time from application of the coating through 40 years of service, followed by a medium-to-large break loss-of-coolant accident scenario, which is a design basis accident (DBA) scenario. The interactive program elements are described in this report and the application of these elements to evaluate the performance of the specific coating system of Phenoline 305 epoxy-phenolic topcoat over Carbozinc 11 primer on a steel substrate. This system is one of the predominant coating systems present on steel substrates in NPP containment.
Date:
February 22, 2001
Creator:
Sindelar, R.L.
Object Type:
Report
System:
The UNT Digital Library
Method for Sampling Alpha-Helical Protein Backbones
We present a novel technique of sampling the configurations of helical proteins. Assuming knowledge of native secondary structure, we employ assembly rules gathered from a database of existing structures to enumerate the geometrically possible 3-D arrangements of the constituent helices. We produce a library of possible folds for 25 helical protein cores. In each case the method finds significant numbers of conformations close to the native structure. In addition we assign coordinates to all atoms for 4 of the 25 proteins. In the context of database driven exhaustive enumeration our method performs extremely well, yielding significant percentages of structures (0.02%--82%) within 6A of the native structure. The method's speed and efficiency make it a valuable contribution towards the goal of predicting protein structure.
Date:
February 22, 2000
Creator:
Fain, Boris & Levitt, Michael
Object Type:
Article
System:
The UNT Digital Library
New Strategies for Designing Inexpensive but Selective Bioadsorbants for Environmental Pollutants: Selection of specific Ligands and Their Cell Surface Expression
The Broad, long term objective of the research plan is to develop exquisitely selective polypeptide metal chelators for the remediation of aqueous systems. A variety of polypeptide chelators will be developed and optimized ranging from antibodies to small peptides. Then, through unique molecular engineering approaches developed in our laboratories, the polypeptide chelators will be anchored directly on the surface of the cells that produce them. Thus, instead of using isolated biomolecules we will employ inexpensive genetically engineered whole cell adsorbents. Following a simple, easily scaleable treatment, the engineered cells can be used to manufacture an inexpensive, particulate adsorbent for metal removal.
Date:
February 22, 2001
Creator:
Iverson, Brent L.; Georgiou, George; Ataai, Mohammad M. & Koepsel, Richard R.
Object Type:
Report
System:
The UNT Digital Library
Am/Cm Vitrification Process: Vitrification Material Balance Calculations
This report documents material balance calculations for the Americium/Curium vitrification process and describes the basis used to make the calculations.
Date:
February 22, 2001
Creator:
Smith, F.G.
Object Type:
Report
System:
The UNT Digital Library
The technology roadmap for plant/crop-based renewable resources 2020
The long-term well-being of the nation and maintenance of a sustainable leadership position in agriculture, forestry, and manufacturing, clearly depend on current and near-term support of multidisciplinary research for the development of a reliable renewable resource base. This document sets a roadmap and priorities for that research. America needs leadership that will continue to recognize, support, and move rapidly to meet the need to expand the use of sustainable renewable resources. This roadmap has highlighted potential ways for progress and has identified goals in specific components of the system. Achieving success with these goals will provide the opportunity to hit the vision target of a fivefold increase in renewable resource use by 2020.
Date:
February 22, 1999
Creator:
McLaren, J.
Object Type:
Book
System:
The UNT Digital Library
Collective motion sampling in proteins and DNA
None
Date:
February 22, 2000
Creator:
Fain, Dr. Boris
Object Type:
Report
System:
The UNT Digital Library
INERT Atmosphere confinement operability test procedure
This Operability Test Procedure (OTP) provides instructions for testing operability of the Inert Atmosphere Confinement (IAC). The Inert Atmosphere Confinement was designed and built for opening cans of metal items that might have hydrided surfaces. Unreviewed Safety Question (USQ) PFP-97-005 addresses the discovery of suspected plutonium hydride forming on plutonium metal currently stored in the Plutonium Finishing Plant vaults. Plutonium hydride reacts quickly with air, liberating energy. The Inert Atmosphere Confinement was designed to prevent this sudden liberation of energy by opening the material in an inert argon atmosphere instead of the normal glovebox atmosphere. The IAC is located in glovebox HC-21A, room 230B of the 234-5Z Building at the Plutonium Finishing Plant (PFP) in the 200-West Area of the Hanford Site.
Date:
February 22, 1999
Creator:
RISENMAY, H.R.
Object Type:
Report
System:
The UNT Digital Library
Broken flavor symmetries in high energy particle phenomenology
Over the past couple of decades, the Standard Model of high energy particle physics has clearly established itself as an invaluable tool in the analysis of high energy particle phenomenon. However, from a field theorists point of view, there are many dissatisfying aspects to the model. One of these, is the large number of free parameters in the theory arising from the Yukawa couplings of the Higgs doublet. In this thesis, we examine various issues relating to the Yukawa coupeng structure of high energy particle field theories. We begin by examining extensions to the Standard Model of particle physics which contain additional scalar fields. By appealing to the flavor structure observed in the fermion mass and Kobayashi-Maskawa matrices, we propose a reasonable phenomenological parameterization of the new Yukawa couplings based on the concept of approximate flavor symmetries. It is shown that such a parameterization eliminates the need for discrete symmetries which limit the allowed couplings of the new scalars. New scalar particles which can mediate exotic flavor changing reactions can have masses as low as the weak scale. Next, we turn to the issue of neutrino mass matrices, where we examine a particular texture which leads to matter independent neutrino …
Date:
February 22, 1995
Creator:
Antaramian, A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
FEMP: Showering with the sun at Chickasaw National Recreation Area case study
This FEMP Technical Assistance Case Study describes the use of solar water heating at the Chickasaw National Recreation Area in Oklahoma. The solar systems are an environmentally sound and cost-effective way to heat water. By using renewable energy technologies to satisfy its mandate to provide services for visitors and protect the park system's natural resources, the National Park Service sets a good example for other Federal agencies and the general public.
Date:
February 22, 1999
Creator:
McIntyre, M.
Object Type:
Book
System:
The UNT Digital Library
Proceedings of the US-LHC collaboration meeting on accelerator physics experiments for future hadron colliders
None
Date:
February 22, 2000
Creator:
Fischer, W. & Pilat, F.
Object Type:
Report
System:
The UNT Digital Library
Nuclear Energy Research Initiative (NERI) Program. 2nd Quarterly Technical Progress Report
The research activities have been underway. We have located a large body of source material from aerospace, shipbuilding and manufacturing businesses that is serving the basis for identifying improvement methodologies. Our work on developing the three models proposed to capture the extent of the improvement possibilities has been ongoing.
Date:
February 22, 2000
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Alternative Fuel News: Official Publication of the U.S. Department of Energy's Clean Cities Network and the Alternative Fuels Data Center; Vol. 4, No. 4
Alternative Fuel News, an ongoing quarterly publication for the U.S. Department of Energy. An official publication of the Clean Cities Network and the Alternative Fuels Data Center.
Date:
February 22, 2001
Creator:
Coulter, J. & Ficker, C.
Object Type:
Book
System:
The UNT Digital Library
Carbon Flux to the Atmosphere from Land-Use Changes: 1850 to 1990
The database documented in this numeric data package, a revision to a database originally published by the Carbon Dioxide Information Analysis Center (CDIAC) in 1995, consists of annual estimates, from 1850 through 1990, of the net flux of carbon between terrestrial ecosystems and the atmosphere resulting from deliberate changes in land cover and land use, especially forest clearing for agriculture and the harvest of wood for wood products or energy. The data are provided on a year-by-year basis for nine regions (North America, South and Central America, Europe, North Africa and the Middle East, Tropical Africa, the Former Soviet Union, China, South and Southeast Asia, and the Pacific Developed Region) and the globe. Some data begin earlier than 1850 (e.g., for six regions, areas of different ecosystems are provided for the year 1700) or extend beyond 1990 (e.g., fuelwood harvest in South and Southeast Asia, by forest type, is provided through 1995). The global net flux during the period 1850 to 1990 was 124 Pg of carbon (1 petagram = 10{sup 15} grams). During this period, the greatest regional flux was from South and Southeast Asia (39 Pg of carbon), while the smallest regional flux was from North Africa and …
Date:
February 22, 2001
Creator:
Houghton, R.A.
Object Type:
Report
System:
The UNT Digital Library
Southwestern Federal Power System 1995 Financial Statement audit under the Chief Financial Officers Act (WR-FC-96-02)
The Southwestern Federal Power System encompasses the operation of 24 hydroelectric power plants by the U.S. Army Corps of Engineers and the marketing of power and energy from those plants by the Southwestern Power Administration of the U.S. Department of Energy. To integrate the operation of these hydroelectric generating plants and to transmit power from the dams to its customers, Southwestern Power Administration (Southwestern) maintains 2,220 kilometers (1,380 miles) of high-voltage transmission lines, 24 substations, and 46 microwave and VHF radio sites. Southwestern`s headquarters are in Tulsa, Oklahoma; its dispatch center is in Springfield, Missouri; and its maintenance crews are based in Jonesboro, Arkansas, in Gore and Tupelo, Oklahoma, and in Springfield, Missouri. Three offices - Power Marketing and Delivery, Maintenance, and Administration and Rates - are responsible for meeting Southwestern`s mission. Twelve of the 24 generating plants are scheduled directly by Southwestern, and a total of 19 contribute to the interconnected system operations. Generation at the five remaining projects (Denison, Narrows, Sam Rayburn, Whitney, and Willis) is used to serve specific customer loads. At the end of fiscal year 1995, Southwestern marketed power and energy to 10 generation and transmission cooperatives, one distribution cooperative, three military installations, 44 municipal …
Date:
February 22, 1996
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Experiences with stacking the first four ATLAS submodules at Argonne
This note is to review our experience at Argonne with assembling the first four sumodules constructed at this location. We will try to cover all of the experiences, and at the end add some comments about changes that were incorporated into the current modules, and suggested changes that may be incorporated into future modules.
Date:
February 22, 1996
Creator:
Hill, N.; Proudfoot, J.; Wood, K.; Balka, L.; Keyser, C. & Caird, A.
Object Type:
Report
System:
The UNT Digital Library
Electric power monthly: February 1995, with data for November 1994
The Electric Power Monthly (EPM) presents monthly electricity statistics for a wide audience including Congress, Federal and State agencies, the electric utility industry, and the general public. The purpose of this publication is to provide energy decisionmakers with accurate and timely information that may be used in forming various perspectives on electric issues that lie ahead. The EIA collected the information in this report to fulfill its data collection and dissemination responsibilities as specified in the Federal Energy Administration Act of 1974 (Public Law 93-275) as amended. 64 tabs.
Date:
February 22, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Army Gas-Cooled Reactor Systems Program Semiannual Progress Report: July 1 - December 31, 1960
Report documenting the progress of the Army Gas-Cooled Reactor Systems Program to develop a mobile nuclear power plant for military field operation.
Date:
February 22, 1961
Creator:
Aerojet-General Corporation
Object Type:
Report
System:
The UNT Digital Library
Shortest Path Planning for a Tethered Robot or an Anchored Cable
We consider the problem of planning shortest paths for a tethered robot with a finite length tether in a 2D environment with polygonal obstacles. We present an algorithm that runs in time O((k{sub 1} + 1){sup 2}n{sup 4}) and finds the shortest path or correctly determines that none exists that obeys the constraints; here n is the number obstacle vertices, and k{sub 1} is the number loops in the initial configuration of the tether. The robot may cross its tether but nothing can cross obstacles, which cause the tether to bend. The algorithm applies as well for planning a shortest path for the free end of an anchored cable.
Date:
February 22, 1999
Creator:
Xavier, P.G.
Object Type:
Article
System:
The UNT Digital Library
A note on simulation and dynamical hierarchies
This paper summarizes some of the problems associated with the generation of higher order emergent structures in formal dynamical systems as well as some of the formal properties of dynamical systems capable of generating higher order structures.
Date:
February 22, 1996
Creator:
Rasmussen, S.; Barrett, C. L.; Baas, N. A. & Olesen, M. W.
Object Type:
Article
System:
The UNT Digital Library
Causes of Indoor Air Quality Problems in Schools: Summary of Scientific Research
In the modern urban setting, most individuals spend about 80% of their time indoors and are therefore exposed to the indoor environment to a much greater extent than to the outdoors (Lebowitz 1992). Concomitant with this increased habitation in urban buildings, there have been numerous reports of adverse health effects related to indoor air quality (IAQ) (sick buildings). Most of these buildings were built in the last two decades and were constructed to be energy-efficient. The quality of air in the indoor environment can be altered by a number of factors: release of volatile compounds from furnishings, floor and wall coverings, and other finishing materials or machinery; inadequate ventilation; poor temperature and humidity control; re-entrainment of outdoor volatile organic compounds (VOCs); and the contamination of the indoor environment by microbes (particularly fungi). Armstrong Laboratory (1992) found that the three most frequent causes of IAQ are (1) inadequate design and/or maintenance of the heating, ventilation, and air-conditioning (HVAC) system, (2) a shortage of fresh air, and (3) lack of humidity control. A similar study by the National Institute for Occupational Safety and Health (NIOSH 1989) recognized inadequate ventilation as the most frequent source of IAQ problems in the work environment (52% …
Date:
February 22, 2001
Creator:
Bayer, C.W.
Object Type:
Report
System:
The UNT Digital Library
Initial Operation of the NSTX Phased Array for Launching High Harmonic Fast Waves
A high harmonic fast wave (HHFW) antenna array, designed to provide up to 6 MW of power at 30 MHz for heating and current drive applications, has been operated on the NSTX experiment at Princeton Plasma Physics Laboratory (PPPL). The full array consists of twelve evenly spaced, identical current strap modules connected in pairs. Each pair is connected as a half-wave resonant loop and is intended to be driven by one transmitter, allowing rapid phase shift between transmitters. A decoupling network compensates for the mutual inductive coupling between adjacent current straps, effectively isolating the six transmitters from one another. Initial rf operation between November 1999 and January 2000 used eight straps to form four loops, which were driven by two transmitters. Two adjacent loops were connected with a {lambda}/2 coax section to be driven out of phase by a single transmitter. Up to 2 MW of power was delivered during this stage of operation; inter-loop phasings of 0-{pi}-{pi}-0 and 0-{pi}-0-{pi} were investigated. Models of the power distribution system indicate the nominal plasma loading was about 5{Omega}/m, close to the design value of 6{Omega}/m. The HHFW system has now been reconfigured for 12-strap, 6-transmitter operation with decouplers; low power vacuum and …
Date:
February 22, 2001
Creator:
Ryan, P.M.
Object Type:
Article
System:
The UNT Digital Library
CSER 99-001: PFP LAB Dentirating calciner
A criticality safety evaluation report was prepared for the Plutonium Finishing Plant (PFP) laboratory denigrating calciner, located in Glovebox 188-1, that converts Pu(NO{sub 3}){sub 4} solutions to the high fired stable oxide PuO{sub 2}. Fissile mass limits and volume limits are set for the glovebox for testing operations and training operators using only nitric acid feed to a plutonium oxide bed in the calciner.
Date:
February 22, 1999
Creator:
Miller, E. M. & Dobbin, K. D.
Object Type:
Report
System:
The UNT Digital Library
Environmental Assessment and Finding of No Significant Impact: Kalina Geothermal Demonstration Project Steamboat Springs, Nevada
The Department of Energy (DOE) has prepared an Environmental Assessment (EA) to provide the DOE and other public agency decision makers with the environmental documentation required to take informed discretionary action on the proposed Kalina Geothermal Demonstration project. The EA assesses the potential environmental impacts and cumulative impacts, possible ways to minimize effects associated with partial funding of the proposed project, and discusses alternatives to DOE actions. The DOE will use this EA as a basis for their decision to provide financial assistance to Exergy, Inc. (Exergy), the project applicant. Based on the analysis in the EA, DOE has determined that the proposed action is not a major Federal action significantly affecting the quality of the human or physical environment, within the meaning of the National Environmental Policy Act (NEPA) of 1969. Therefore, the preparation of an environmental impact statement is not required and DOE is issuing this Finding of No Significant Impact (FONSI).
Date:
February 22, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library