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The 0.22 Percent Across-the-Board Cut in FY2001 Appropriations
Report describing changes that affected the government budget for the 2001 fiscal year under the Consolidated Appropriations Act.
Date:
May 31, 2001
Creator:
Keith, Robert
Object Type:
Report
System:
The UNT Digital Library
A 1.5 Mwe Thermionic Reactor Space Power System
None
Date:
October 31, 1966
Creator:
Smith, C. K. & Parkinson, R. Y.
Object Type:
Report
System:
The UNT Digital Library
The 2.6 Angstrom resolution structure of Rhodobacter capsulatus bacterioferritin with metal-free dinuclear site and heme iron in a crystallographic 'special position'
None
Date:
October 31, 2001
Creator:
Cobessi, D.; Huang, L.-S.; Ban, M.; Pon, N. G.; Daldal, F. & Berry, E. A.
Object Type:
Article
System:
The UNT Digital Library
3-D Mapping Technologies for High Level Waste Tanks
This research investigated four techniques that could be applicable for mapping of solids remaining in radioactive waste tanks at the Savannah River Site: stereo vision, LIDAR, flash LIDAR, and Structure from Motion (SfM). Stereo vision is the least appropriate technique for the solids mapping application. Although the equipment cost is low and repackaging would be fairly simple, the algorithms to create a 3D image from stereo vision would require significant further development and may not even be applicable since stereo vision works by finding disparity in feature point locations from the images taken by the cameras. When minimal variation in visual texture exists for an area of interest, it becomes difficult for the software to detect correspondences for that object. SfM appears to be appropriate for solids mapping in waste tanks. However, equipment development would be required for positioning and movement of the camera in the tank space to enable capturing a sequence of images of the scene. Since SfM requires the identification of distinctive features and associates those features to their corresponding instantiations in the other image frames, mockup testing would be required to determine the applicability of SfM technology for mapping of waste in tanks. There may be …
Date:
August 31, 2010
Creator:
Marzolf, A. & Folsom, M.
Object Type:
Article
System:
The UNT Digital Library
3-D subsurface modeling within the framework of an environmental restoration information system: Prototype results using earthvision
As a result of the DOE Oak Ridge Reservation (DOE-ORR) placement on the EPA Superfund National Priorities List in December of 1989, all remedial activities, including characterization, remedial alternatives selection, and implementation of remedial measures, must meet the combined requirements of RCRA, CERCLA, and NEPA. The Environmental Restoration Program, therefore, was established with the mission of eliminating or reducing to prescribed safe levels the risks to the environment or to human health and safety posed by inactive and surplus DOE-ORR managed sites and facilities that have been contaminated by radioactive and surplus DOE-ORR managed sites and facilities that have been contaminated by radioactive, hazardous, or mixed wastes. In accordance with an established Federal Facilities Agreement (FFA), waste sites and facilities across the DOE-ORR have been inventoried, prioritized, and are being systematically investigated and remediated under the direction of Environmental Restoration. EarthVision, a product of Dynamic Graphics, Inc., that provides three-dimensional (3-D) modeling and visualization, was exercised within the framework of an environmental restoration (ER) decision support system. The goal of the prototype was to investigate framework integration issues including compatibility and value to decision making. This paper describes the ER program, study site, and information system framework; selected EarthVision results …
Date:
December 31, 1994
Creator:
Goeltz, R. T. & Zondlo, T. F.
Object Type:
Article
System:
The UNT Digital Library
3-D turbulent particle dispersion submodel development. Quarterly progress report No. 1, 5 April--5 July 1991
The lack of a mathematical description of the interactions of fluid turbulence with other physics-chemical processes is a major obstacle in modeling many industrial program. Turbulent two-phase flow is a phenomenon that is of significant practical importance to coal combustion as well as other disciplines. The interactions of fluid turbulence with the particulate phase has yet to be accurately and efficiently modeled for these industrial applications. On 15 May 1991 work was initiated to cover four major tasks toward the development of a computational submodel for turbulent particle dispersion that would be applicable to coal combustion simulations. Those four tasks are: 1. A critical evaluation of the 2-D Lagrangian particle dispersion submodel, 2. Development of a 3-D submodel for turbulent particle dispersion, 3. Evaluation of the 3-D submodel for turbulent particle dispersion, 4.Exploration of extensions of the Lagrangian dispersion theory to other applications including chemistry-turbulence interactions.
Date:
December 31, 1991
Creator:
Smith, P. J.
Object Type:
Report
System:
The UNT Digital Library
3-D turbulent particle dispersion submodel development. Quarterly progress report No. 2, 15 July--15 October 1991
The lack of a mathematical description of the interactions of fluid turbulence with other physics-chemical processes is a major obstacle in modeling many industrial program. Turbulent two-phase flow is a phenomenon that is of significant practical importance to coal combustion as well as other disciplines. The interactions of fluid turbulence with the particulate phase has yet to be accurately and efficiently modeled for these industrial applications. On 15 May 1991 work was initiated to cover four major tasks toward the development of a computational submodel for turbulent particle dispersion that would be applicable to coal combustion simulations. Those four tasks are: 1. A critical evaluation of the 2-D Lagrangian particle dispersion submodel, 2. Development of a 3-D submodel for turbulent particle dispersion, 3. Evaluation of the 3-D submodel for turbulent particle dispersion, 4. Exploration of extensions of the Lagrangian dispersion theory to other applications including chemistry-turbulence interactions.
Date:
December 31, 1991
Creator:
Smith, P. J.
Object Type:
Report
System:
The UNT Digital Library
4-D High-Resolution Seismic Reflection Monitoring of Miscible CO2 Injected into a Carbonate Reservoir
The objective of this research project is to acquire, process, and interpret multiple high-resolution 3-D compressional wave and 2-D, 2-C shear wave seismic data in an attempt to observe changes in fluid characteristics in an oil field before, during, and after the miscible carbon dioxide (CO{sub 2}) flood that began around December 1, 2003, as part of the DOE-sponsored Class Revisit Project (DOE DE-AC26-00BC15124). Unique and key to this imaging activity is the high-resolution nature of the seismic data, minimal deployment design, and the temporal sampling throughout the flood. The 900-m-deep test reservoir is located in central Kansas oomoldic limestones of the Lansing-Kansas City Group, deposited on a shallow marine shelf in Pennsylvanian time. After 30 months of seismic monitoring, one baseline and eight monitor surveys clearly detected changes that appear consistent with movement of CO{sub 2} as modeled with fluid simulators and observed in production data.
Date:
August 31, 2006
Creator:
Miller, Richard D.; Raef, Abdelmoneam E.; Byrnes, Alan P. & Harrison, William E.
Object Type:
Report
System:
The UNT Digital Library
4-D XRD for strain in many grains using triangulation
Determination of the strains in a polycrystalline materialusing 4-D XRD reveals sub-grain and grain-to-grain behavior as a functionof stress. Here 4-D XRD involves an experimental procedure usingpolychromatic micro-beam X-radiation (micro-Laue) to characterizepolycrystalline materials in spatial location as well as with increasingstress. The in-situ tensile loading experiment measured strain in a modelaluminum-sapphire metal matrix composite using the Advanced Light Source,Beam-line 7.3.3. Micro-Laue resolves individual grains in thepolycrystalline matrix. Results obtained from a list of grains sorted bycrystallographic orientation depict the strain states within and amongindividual grains. Locating the grain positions in the planeperpendicular to the incident beam is trivial. However, determining theexact location of grains within a 3-D space is challenging. Determiningthe depth of the grains within the matrix (along the beam direction)involved a triangulation method tracing individual rays that producespots on the CCD back to the point of origin. Triangulation wasexperimentally implemented by simulating a 3-D detector capturingmultiple diffraction images while increasing the camera to sampledistance. Hence by observing the intersection of rays from multiple spotsbelonging to the corresponding grain, depth is calculated. Depthresolution is a function of the number of images collected, grain to beamsize ratio, and the pixel resolution of the CCD. The 4DXRD methodprovides grain morphologies, strain …
Date:
December 31, 2006
Creator:
Bale, Hrishikesh A.; Hanan, Jay C. & Tamura, Nobumichi
Object Type:
Article
System:
The UNT Digital Library
5. international workshop on the identification of transcribed sequences
This workshop was held November 5--8, 1995 in Les Embiez, France. The purpose of this conference was to provide a multidisciplinary forum for exchange of state-of-the-art information on mapping the human genome. Attention is focused on the following topics: transcriptional maps; functional analysis; techniques; model organisms; and tissue specific libraries and genes. Abstracts are included of the papers that were presented.
Date:
December 31, 1995
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
D = 5 Maximally Supersymmetric Yang-Mills Theory Diverges at Six Loops
None
Date:
October 31, 2012
Creator:
Bern, Zvi; Carrasco, John Joseph; Dixon, Lance J.; Douglas, Michael R.; von Hippel, Matt & Johansson, Henrik
Object Type:
Article
System:
The UNT Digital Library
8. annual national conference of black physics students -- A summary report
The primary goals of the conference were to: (1) Develop a peer/mentor network within the African-American physics community; (2) Inform African-American students in physics of the various academic and professional opportunities; and (3) Bring important academic, economic and political issues and developments in the field to the attention of the students. The conference program was designed to fulfill these goals and optimize the students` exposure to physics as a professional and its real-life applications in both industry and academia.
Date:
December 31, 1994
Creator:
Valk, H.S.
Object Type:
Article
System:
The UNT Digital Library
An 8-Element Fast-Neutron Double-Scatter Directional Detector.
We have constructed a fast-neutron double-scatter spectrometer that efficiently measures the neutron spectrum and direction of a spontaneous fission source. The device consists of two planes of organic scintillators, each having an area of 125 cm{sup 2}, efficiently coupled to photomultipliers. The four scintillators in the front plane are 2 cm thick, giving almost 25% probability of detecting an incident fission-spectrum neutron at 2 MeV by proton recoil and subsequent ionization. The back plane contains four 5-cm-thick scintillators which give a 40% probability of detecting a scattered fast neutron. A recordable double-scatter event occurs when a neutron is detected in both a front plane detector and a back plane detector within an interval of 500 nanoseconds. Each double-scatter event is analyzed to determine the energy deposited in the front plane, the time of flight between detectors, and the energy deposited in the back plane. The scattering angle of each incident neutron is calculated from the ratio of the energy deposited in the first detector to the kinetic energy of the scattered neutron.
Date:
July 31, 2005
Creator:
Vanier, P. E. & Forman, L.
Object Type:
Article
System:
The UNT Digital Library
8. Innovative Technologies: Two-Phase Heat Transfer in Water-Based Nanofluids for Nuclear Applications Final Report
Abstract Nanofluids are colloidal dispersions of nanoparticles in water. Many studies have reported very significant enhancement (up to 200%) of the Critical Heat Flux (CHF) in pool boiling of nanofluids (You et al. 2003, Vassallo et al. 2004, Bang and Chang 2005, Kim et al. 2006, Kim et al. 2007). These observations have generated considerable interest in nanofluids as potential coolants for more compact and efficient thermal management systems. Potential Light Water Reactor applications include the primary coolant, safety systems and severe accident management strategies, as reported in other papers (Buongiorno et al. 2008 and 2009). However, the situation of interest in reactor applications is often flow boiling, for which no nanofluid data have been reported so far. In this project we investigated the potential of nanofluids to enhance CHF in flow boiling. Subcooled flow boiling heat transfer and CHF experiments were performed with low concentrations of alumina, zinc oxide, and diamond nanoparticles in water (≤ 0.1 % by volume) at atmospheric pressure. It was found that for comparable test conditions the values of the nanofluid and water heat transfer coefficient (HTC) are similar (within 20%). The HTC increased with mass flux and heat flux for water and nanofluids alike, …
Date:
July 31, 2009
Creator:
Buongiorno, Jacopo & Hu, Lin-wen
Object Type:
Report
System:
The UNT Digital Library
9-11 Commission Hearing #1, March 31, 2003, Part 1
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on March 31, 2003 at the Alexander Hamilton U.S. Custom House in New York City. This purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. This section includes the Commissioner's opening statements and remarks by George Pataki, Governor of New York and Micheal Bloomberg, the Mayor of New York City.
Date:
March 31, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #1, March 31, 2003, Part 2
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on March 31, 2003 at the Alexander Hamilton U.S. Custom House in New York City. The purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. This section includes remarks from Micheal Bloomberg, Mayor of New York, Raymond Kelley, New York Police Commissioner, and Harry Waizer, a survivor from the financial services firm, Cantor Fitzgerald, which as headquartered in the World Trade Center.
Date:
March 31, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #1, March 31, 2003, Part 3
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on March 31, 2003 at the Alexander Hamilton U.S. Custom House in New York City. The purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. This section concludes the opening remarks and begins the testimony from survivors of the September 11th attacks on their experiences.
Date:
March 31, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #1, March 31, 2003, Part 4
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on March 31, 2003 at the Alexander Hamilton U.S. Custom House in New York City. The purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. This section concludes the testimony from survivors of the September 11th attacks and begins the testimony from representatives of the victims.
Date:
March 31, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #1, March 31, 2003, Part 5
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on March 31, 2003 at the Alexander Hamilton U.S. Custom House in New York City. The purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. This section concludes the testimony from representatives of the victims and begins the testimony from professionals in various fields on the September 11th attackers, intelligence, and counter-terrorism policy.
Date:
March 31, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #1, March 31, 2003, Part 6
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on March 31, 2003 at the U.S. Alexander Hamilton Custom House. The purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. This section continues the section on testimony from the professionals on the attackers, intelligence, and counter-terrorism policy.
Date:
March 31, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #1, March 31, 2003, Part 7
Recording of the first public hearing held by the National Commission on Terrorist Attacks upon the United States on March 31, 2003 at the Alexander Hamilton U.S. Custom House in New York City.The purpose of this hearing was to engage those whose lives were changed by the events of September 11 in a public dialogue about the Commission's goals. This section concludes the testimony on the 9/11 attackers, intelligence, and counter-terrorism policy.
Date:
March 31, 2003
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9. international mouse genome conference
This conference was held November 12--16, 1995 in Ann Arbor, Michigan. The purpose of this conference was to provide a multidisciplinary forum for exchange of state-of-the-art information on genetic mapping in mice. This report contains abstracts of presentations, focusing on the following areas: mutation identification; comparative mapping; informatics and complex traits; mutagenesis; gene identification and new technology; and genetic and physical mapping.
Date:
December 31, 1995
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
A 10-GeV, 5-MW proton source for a muon-muon collider
The performance parameters of a proton source which produces the required flux of muons for a 2-TeV on 2-TeV muon collider are: a beam energy of 10 GeV, a repetition rate of 30 Hz, two bunches per pulse with 5 x 10{sup 13} protons per bunch, and an rms bunch length of 3 nsec (1). Aside from the bunch length requirement, these parameters are identical to those of a 5-MW proton source for a spallation neutron source based on a 10-GeV rapid cycling synchrotron (RCS) (2). The 10-GeV synchrotron uses a 2-GeV accelerator system as its injector, and the 2-GeV RCS is an extension of a feasibility study for a I-MW spallation source described elsewhere (3--9). A study for the 5-MW spallation source was performed for ANL site-specific geometrical requirements. Details are presented for a site-independent proton source suitable for the muon collider utilizing the results of the 5-MW spallation source study.
Date:
December 31, 1995
Creator:
Cho, Y.; Chae, Y.-C. & Crosbie, E.
Object Type:
Article
System:
The UNT Digital Library
A 10-GeV, 5-MW proton source for a pulsed spallation source
A feasibility study for a pulsed spallation source based on a 5-MW, 10-GeV rapid proton synchrotron (RCS) is in progress. The integrated concept and performance parameters of the facility are discussed. The 10-GeV synchrotron uses as its injector the 2-GeV accelerator system of a 1-MW source described elsewhere. The 1-MW source accelerator system consists of a 400-MeV H{sup {minus}} linac with 2.5 MeV energy spread in the 75% chopped (25% removed) beam and a 30-Hz RCS that accelerates the 400-MeV beam to 2 GeV. The time averaged current of the accelerator system is 0.5 mA, equivalent to 1.04 {times} 10{sup 14} protons per pulse. The 10-GeV RCS accepts the 2 GeV beam and accelerates it to 10 GeV. Beam transfer from the 2-GeV synchrotron to the 10-GeV machine u highly efficient bunch-to-bucket injection, so that the transfer can be made without beam loss. The synchrotron lattice uses FODO cells of 90{degrees} phase advance. Dispersion-free straight sections are obtained using a missing magnet scheme. The synchrotron magnets are powered by dual-frequency resonant circuits. The magnets are excited at a 20-Hz rate and de-excited at 60-Hz. resulting in an effective 30-Hz rate. A key feature of the design of this accelerator system …
Date:
December 31, 1995
Creator:
Cho, Y.; Chae, Y.C. & Crosbie, E.
Object Type:
Article
System:
The UNT Digital Library