Partner
UNT Libraries Government Documents Department
452
Oklahoma Historical Society
42
UNT Libraries Special Collections
17
UNT Libraries
14
National Museum of the Pacific War/Admiral Nimitz Foundation
10
Sterling Municipal Library
10
Carl Albert Congressional Research and Studies Center
8
UNT Music Library
8
San Antonio Public Library
6
Patrick Heath Public Library
4
57 More
Collection
Office of Scientific & Technical Information Technical Reports
296
Texas Digital Newspaper Program
108
Government Accountability Office Reports
75
Congressional Research Service Reports
62
Oklahoma Digital Newspaper Program
52
Tocker Foundation Grant
47
The Baytown Sun
10
The Greensheet
10
National Museum of the Pacific War Oral History Collection
10
National Museum of the Pacific War Digital Archive
10
96 More
Degree Department
Degree Discipline
Degree Level
Country
Decade
Month
Day
Language
655 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
655
next
Kahler Independence of the G2-MSSM
The G{sub 2}-MSSM is a model of particle physics coupled to moduli fields with interesting phenomenology both for colliders and astrophysical experiments. In this paper we consider a more general model--whose moduli Kahler potential is a completely arbitrary G{sub 2}-holonomy Kahler potential and whose matter Kahler potential is also more general. We prove that the vacuum structure and spectrum of BSM particles is largely unchanged in this much more general class of theories. In particular, gaugino masses are still suppressed relative to the gravitino mass and moduli masses. We also consider the effects of higher order corrections to the matter Kahler potential and find a connection between the nature of the LSP and flavor effects.
Date:
October 31, 2008
Creator:
Acharya, Bobby S. & Bobkov, Konstantin
Object Type:
Article
System:
The UNT Digital Library
Atmospheric Radiation Measurement Program Science Plan
The Atmospheric Radiation Measurement (ARM) Program has matured into one of the key programs in the U.S. Climate Change Science Program. The ARM Program has achieved considerable scientific success in a broad range of activities, including site and instrument development, atmospheric radiative transfer, aerosol science, determination of cloud properties, cloud modeling, and cloud parameterization testing and development. The focus of ARM science has naturally shifted during the last few years to an increasing emphasis on modeling and parameterization studies to take advantage of the long time series of data now available. During the next 5 years, the principal focus of the ARM science program will be to: Maintain the data record at the fixed ARM sites for at least the next five years. Improve significantly our understanding of and ability to parameterize the 3-D cloud-radiation problem at scales from the local atmospheric column to the global climate model (GCM) grid square. Continue developing techniques to retrieve the properties of all clouds, with a special focus on ice clouds and mixed-phase clouds. Develop a focused research effort on the indirect aerosol problem that spans observations, physical models, and climate model parameterizations. Implement and evaluate an operational methodology to calculate broad-band heating …
Date:
October 31, 2004
Creator:
Ackerman, T
Object Type:
Report
System:
The UNT Digital Library
Comparison between S/1 and R/1 tests and damage density vs. fluence (rho(phi)) results for unconditioned and sub-nanosecond laser-conditioned KD2PO4 crystals
We present S/1 and R/1 test results on unconditioned and 355 nm (3{omega}), 500 ps laser conditioned DKDP. We find up to {approx}2.5X improvement in fluence in the S/1 performance after 3{omega}, 500 ps conditioning to 5 J/cm{sup 2}. For the first time, we observe a shift to higher fluences in the R/1 results for DKDP at 3{omega}, 7 ns due to 500 ps laser conditioning. The S/1 results are compared to {rho}({phi}) results previously measured on the same DKDP crystal [1]. A consistent behavior in fluence was found between the S/1 and {rho}({phi}) results for unconditioned and 500 ps conditioned DKDP. We were successful at using Poisson statistics to derive a connection between the S/1 and {rho}({phi}) results that could be tested with our data sets by trying to predict the shape of the {rho}({phi}) curve. The value for the power dependence on fluence of {rho}({phi}) derived from the S/1 data was {approx}11 {+-} 50%. The results presented and discussed here imply a strong correlation between the damage probability (S/1) test and {rho}({phi}). We find a consistent description of the two test types in terms of a power law {rho}({phi}) and that this basic shape held for all cases, …
Date:
October 31, 2007
Creator:
Adams, J. J.; Jarboe, J.; Feit, M. & Hackel, R.
Object Type:
Article
System:
The UNT Digital Library
Final Report - DOE Center for Laser Imaging and Cancer Diagnostics
This Final Report summarizes the significant progress made by the researchers, students and staff of the Center for Laser Imaging and Cancer Diagnostics (CLICD) from January 1998 through May 2002. During this period, the Center supported several projects. Most projects were proposed initially, some were added subsequently as their relevance and importance to the DOE mission became evident. DOE support has been leveraged to obtain continuing funding for some projects. Leveraged funds come from various sources, including NIH, Army, NSF and the Air Force. The goal of the Center was to develop laser-based instruments for use in the detection and diagnosis of major diseases, with an emphasis on detection and diagnosis of various cancers. Each of the supported projects is a collaborative effort between physicists and laser scientists and the City College of New York and noted physicians, surgeons, pathologists, and biologists located at medical centers in the Metropolitan area. The participating institutions were: City College of New York Institute for Ultrafast Lasers and Spectroscopy, Hackensack University Medical Center, Lawrence Livermore National Laboratory, Memorial Sloan Kettering Cancer Center, and New York Eye and Ear Institute. Each of the projects funded by the Center is grouped into one of four research …
Date:
October 31, 2002
Creator:
Alfano, Robert R. & Koutcher, Jason A.
Object Type:
Report
System:
The UNT Digital Library
The First Day of a New Congress: A Guide to Proceedings on the House Floor
This report focuses on the floor activities of the House during its first formal session in a new Congress, and serves as a guide for those participating in or watching these proceedings.
Date:
October 31, 2008
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
Members of the U.S. Congress Who Have Died of Other Than Natural Causes while in Office
This report provides an alphabetical list of the 61 Members of Congress who have died of other than natural causes while serving in the U.S. House of Representatives or the U.S. Senate. Each entry includes party affiliation, the name of the state that the Member represented, dates of service, chamber in which the Member served, and cause of death.
Date:
October 31, 2002
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
Abiotic Degradation Rates for Carbon Tetrachloride: and Chloroform: Progress in FY 2008
This is a letter report summarizing work performed in FY2008 to determine the rates of carbon tetrachloride hydrolysis at temperatures close to actual groundwater temperatures. The report describes the project, the methodology, and the results obtained since the project's inception in FY2006. Measurements of hydrolysis rates in homogeneous solution have been completed for temperaturs of 70 C through 40 C, with additional data available at 30 C and 20 C. These results show no difference between the rates in deionized H2O and in filter-sterilized Hanford-Site groundwater. Moreover, the rates measured are 2-3 times slower than predicted from the open literature. Measurements of rates involving sterile suspensions of Hanford-Site sediment in Hanford-Site groundwater, however, show faster hydrolysis at temperatures below 40 C. Extrapolation of the current data available suggests a six-fold increase in rate would be expected at groundwater temperature of 16 C due to the presence of the sediment. This result translates into a 78-year half-life, rather than the 470-680 year half-life that would be predicted from rate determinations in homogeneous solution. The hydrolysis rate data at 20 C, in contrast to those at higher temperatures, are preliminary and have low statistical power. While significant (p < 0.05) differences between …
Date:
October 31, 2008
Creator:
Amonette, James E.; Jeffers, Peter M.; Qafoku, Odeta; Russell, Colleen K.; Wietsma, Thomas W. & Truex, Michael J.
Object Type:
Report
System:
The UNT Digital Library
Energy Savings Potentials in Residential and Small Commercial Thermal Distribution Systems - an Update
This is an update of a report (Andrews and Modera 1991) that quantified the amounts of energy that could be saved through better thermal distribution systems in residential and small commercial buildings. Thermal distribution systems are the ductwork, piping, or other means used to transport heat or cooling from the space-conditioning equipment to the conditioned space. This update involves no basic change in methodology relative to the 1991 report, but rather a review of the additional information available in 2003 on the energy-use patterns in residential and small commercial buildings.
Date:
October 31, 2003
Creator:
Andrews, J. W.
Object Type:
Report
System:
The UNT Digital Library
A HISTORY OF ASHRAE STANDARDS 152P.
The American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) has been developing a standard test method for evaluating the efficiency of ducts and other types of thermal distribution systems in single-family residential buildings. This report presents an overview of the structure, function, and historical development of this test method.
Date:
October 31, 2003
Creator:
Andrews, J. W.
Object Type:
Report
System:
The UNT Digital Library
Future Directions for Thermal Distribution Standards
This report details development paths for advanced versions of ASHRAE Standard 152, Method of Test for Determining the Design and Seasonal Efficiencies of Residential Thermal Distribution Efficiency. During the course of conversations within the ASHRAE committee responsible for developing the standard (SPC152P), three areas of development for Standard 152 were proposed: (1) extend the scope of the standard to include thermal comfort variables; (2) extend the scope of the standard to include small commercial buildings; and (3) improve the existing standard with respect to accuracy and economy of effort. Research needs associated with each of the three options are identified.
Date:
October 31, 2003
Creator:
Andrews, John W.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 105, No. 195, Ed. 1 Friday, October 31, 2003
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 31, 2003
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 106, No. 182, Ed. 1 Sunday, October 31, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 31, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
FUNDAMENTAL SAFETY TESTING AND ANALYSIS OF HYDROGEN STORAGE MATERIALS AND SYSTEMS
None
Date:
October 31, 2007
Creator:
Anton, D; Kyle Brinkman, K & Joshua Gray, J
Object Type:
Report
System:
The UNT Digital Library
SOLID STATE HYDRIDE SYSTEM ENGINEERING
A typical hydrogen refueling station was designed based on DOE targets and existing gasoline filling station operations. The purpose of this design was to determine typical heat loads, how these heat loads will be handled, and approximate equipment sizes. For the station model, two DOE targets that had the most impact on the design were vehicle driving range and refueling time. The target that hydrogen fueled vehicles should have the equivalent driving range as present automobiles, requires 5 kg hydrogen storage. Assuming refueling occurs when the tank is 80% empty yields a refueling quantity of 4 kg. The DOE target for 2010 of a refueling time of 3 minutes was used in this design. There is additional time needed for payment of the fuel, and connecting and disconnecting hoses and grounds. It was assumed that this could be accomplished in 5 minutes. Using 8 minutes for each vehicle refueling gives a maximum hourly refueling rate of 7.5 cars per hour per fueling point.
Date:
October 31, 2007
Creator:
Anton, D; Mark Jones, M & Bruce Hardy, B
Object Type:
Report
System:
The UNT Digital Library
Convection Heat Transfer in Three-Dimensional Turbulent Separated/Reattached Flow
The measurements and the simulation of convective heat transfer in separated flow have been a challenge to researchers for many years. Measurements have been limited to two-dimensional flow and simulations failed to predict accurately turbulent heat transfer in the separated and reattached flow region (prediction are higher than measurements by more than 50%). A coordinated experimental and numerical effort has been initiated under this grant for examining the momentum and thermal transport in three-dimensional separated and reattached flow in an effort to provide new measurements that can be used for benchmarking and for improving the simulation capabilities of 3-D convection in separated/reattached flow regime. High-resolution and non-invasive measurements techniques are developed and employed in this study to quantify the magnitude and the behavior of the three velocity components and the resulting convective heat transfer. In addition, simulation capabilities are developed and employed for improving the simulation of 3-D convective separated/reattached flow. Such basic measurements and simulation capabilities are needed for improving the design and performance evaluation of complex (3-D) heat exchanging equipment. Three-dimensional (3-D) convective air flow adjacent to backward-facing step in rectangular channel is selected for the experimental component of this study. This geometry is simple but it exhibits …
Date:
October 31, 2007
Creator:
Armaly, Bassem F.
Object Type:
Report
System:
The UNT Digital Library
Hydration and mobility of HO-(aq)
The hydroxide anion plays an essential role in many chemical and biochemical reactions. But questions of its hydration state and transport in water are currently controversial. Here we address this situation using the quasi-chemical theory of solutions. The simplest such approach suggests that HO [H20]3- is the most probable species at infinite dilution in aqueous solution under standard conditions, followed by the HO . [H20]2- and HO . [HzO]- forms which are close together in stablity. HO . [H20]4- is less stable, in contrast to recent proposals that the latter structure is the most stable hydration species in solution. Ab initio molecular dynamics results presented here support the dominance of the tri-hydrated form, but that the population distribution is broad and sensitive to solution conditions. On the basis of these results, the mobility of hydroxide can be simply that of a proton hole. This contrasts with recent proposals invoking the interconversion of a stable 'trap' structure HO . [H20]4- to HO . [H20]3- as the rate determining step in the transport process.
Date:
October 31, 2002
Creator:
Asthagiri, D. (Dilipkumar); Pratt, Lawrence Riley; Kress, J. D. (Joel D.) & Gomez, M. A. (Maria A.)
Object Type:
Article
System:
The UNT Digital Library
Vector-Tensor and Vector-Vector Decay AmplitudeAnalysis of B0 to phi K*0
We perform an amplitude analysis of the decays B{sup 0} {yields} {phi}K*{sub 2}(1430){sup 0}, {phi}K*(892){sup 0}, and {phi}(K{pi}){sub S-wave}{sup 0} with a sample of about 384 million B{bar B} pairs recorded with the BABAR detector. The fractions of longitudinal polarization f{sub L} of the vector-tensor and vector-vector decay modes are measured to be 0.853{sub -0.069}{sup +0.061} {+-} 0.036 and 0.506 {+-} 0.040 {+-} 0.015, respectively. Overall, twelve parameters are measured for the vector-vector decay and seven parameters for the vector-tensor decay, including the branching fractions and parameters sensitive to CP-violation.
Date:
October 31, 2006
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Observation of a Broad Structure at an Invariant Massof 4.32 GeV in the Reaction e+e- to pi+pi-psi(2S) Measured at BaBar
The authors measure the cross section for the process e{sup +}e{sup -} {yields} {pi}{sup +}{pi}{sup -}{psi}(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the PEP-II e{sup +}e{sup -} storage rings. The study is based on 298 fb{sup -1} of data recorded with the BABAR detector. A structure is observed in the cross-section not far above threshold, near 4.32 GeV. This structure is not compatible with the Y(4260) previously reported by this experiment. A single resonance is adequate to describe the cross-section in the low-energy region (< 5.7 GeV).
Date:
October 31, 2006
Creator:
Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.
Object Type:
Article
System:
The UNT Digital Library
Observation and Polarization of B->phiK1+ and phiK*2+
With the full BABAR data sample of 465 million B{bar B} pairs, they observe the decays B{sup {+-}} {yields} {psi}K{sub 1}(1270){sup {+-}} and B{sup {+-}} {yields} {psi}K*{sub 2}(1430){sup {+-}}. They measure the branching fractions (6.1 {+-} 1.6 {+-} 1.1) x 10{sup -6} and (8.4 {+-} 1.9 {+-} 0.9) x 10{sup -6} and the fractions of longitudinal polarization 0.46{sub -0.13-0.07}{sup +0.12+0.03} and 0.80{sub -0.10}{sup +0.09} {+-} 0.03, respectively. They also report on the B{sup {+-}} {yields} {psi}K*{sub 0}(1430){sup {+-}} decay branching fraction of (7.0 {+-} 1.3 {+-} 0.9) x 10{sup -6} and several parameters sensitive to CP violation and interference in the above three decays. Upper limits are placed on the B{sup {+-}} decay rates to final states with {psi} and K{sub 1}(1400){sup {+-}}, K*(1410){sup {+-}}, K{sub 2}(1770){sup {+-}}, or K{sub 2}(1820){sup {+-}}. Understanding the observed polarization pattern requires amplitude contributions from an uncertain source.
Date:
October 31, 2008
Creator:
Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Science & Technology Review December 2005
This month's issue has the following articles: (1) Helping NNSA Managers Chart the Future Stockpile--Commentary by Bruce T. Goodwin; (2) Modeling the Future--Livermore researchers have developed a computational tool that simulates the effects of changing demands on the nuclear weapons complex; (3) A Peculiar Burst of Stars--By combining computer simulations with optical and radio astronomical techniques, astrophysicists can better understand how stars form; (4) Exploring the Link between Diet and Cancer--Scientists combine experiments and simulations to demonstrate how food mutagens could promote hormone-sensitive cancers; and (5) When Lightning Strikes at Site 300--Electrical engineers are certifying that Livermore's Site 300 provides a safe work environment, even during a lightning storm.
Date:
October 31, 2005
Creator:
Aufderheide, M. B., III
Object Type:
Report
System:
The UNT Digital Library
IFSAR for the Rapid Terrain Visualization Demonstration
The Rapid Terrain Visualization Advanced Concept Technology Demonstration (RTV-ACTD) is designed to demonstrate the technologies and infrastructure to meet the Army requirement for rapid generation of digital topographic data to support emerging crisis or contingencies. The primary sensor for this mission is an interferometric synthetic aperture radar (IFSAR) designed at Sandia National Laboratories. This paper will outline the design of the system and its performance, and show some recent flight test results. The RTV IFSAR will meet DTED level III and IV specifications by using a multiple-baseline design and high-accuracy differential and carrier-phase GPS navigation. It includes innovative near-real-time DEM production on-board the aircraft. The system is being flown on a deHavilland DHC-7 Army aircraft.
Date:
October 31, 2000
Creator:
BURNS,BRYAN L.; EICHEL,PAUL H.; HENSLEY JR.,WILLIAM H. & KIM,THEODORE J.
Object Type:
Article
System:
The UNT Digital Library
Multi-keV X-Ray Conversion Efficiency in Laser-Produced Plasmas
X-ray sources are created at the Nova and Omega laser by irradiating a confined volume of Ar, Xe, or Kr gas. The gas is heated by forty 0.35 {micro}m wavelength, 1-ns square laser beams to produce He-like ions that radiate K-shell emission over mm-sized dimensions. The targets are designed to be ''underdense'', meaning that the initial gas density is lower than the critical density of the laser, n{sub c} {approx} 10{sup 21} cm{sup -3}. The laser energy is primarily absorbed by inverse bremsstrahlung and a supersonic heat wave efficiently ionizes the gas. Results from time-resolved and time-integrated diagnostics over a range of experimental parameters are compared. This work represents an important, new method for development of efficient, large-area, tailored multi-keV x-ray sources.
Date:
October 31, 2002
Creator:
Back, C. A.; Landen, O. L.; Hammer, J. H.; Suter, L. J.; Miller, M. C.; Davis, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Toolboxes and Templates for Large Scale Linear Algebra Problems
None
Date:
October 31, 2002
Creator:
Bai, Zhaojun; Demmel, James & Dongarra, Jack
Object Type:
Report
System:
The UNT Digital Library
Computational Modeling of Uranium Corrosion and the role of Impurities(Fe, Cr, Al, C and Si)
My talk will focus on our recent computational modeling results of uranium corrosion and the impact of impurities on uranium corrosion, which occurs primarily through hydriding Uranium hydriding is one of the most important processes that has received considerable attention over many years. Although significant number of experimental and modeling studies have been carried out concerning thermo chemistry, diffusion kinetics and mechanisms of U-hydriding, very little is known about the electronic structure and electronic features that govern the U-hydriding process. Our modeling efforts focus the electronic feature that controls the activation barrier and thus the rate of hydriding. Our recent efforts have been focused on the role of impurities such as Fe, Cr, Si, C, Al and so on. Moreover the role of impurities and the role of the product UH{sub 3} on hydriding rating have not been fully understood. Condon's diffusion model was found to be in excellent agreement with the experimental reaction rates. From the slopes of the Arrhenius plot the activation energy was calculated as 6.35 kcal/mole. Bloch and Mintz have discussed two models, one, which considers hydrogen diffusion through a protective UH{sub 3} product layer, and the second where hydride growth occurs at the hydride-metal interface. …
Date:
October 31, 2005
Creator:
Balasubramanian, K.; Sikehaus, W.; Balazs, B. & McLean, W., II
Object Type:
Article
System:
The UNT Digital Library