Partner
Oklahoma Historical Society
250
UNT Libraries Government Documents Department
185
Sterling Municipal Library
94
South Plains College
64
Livingston Municipal Library
55
Swisher County Library
52
UNT Libraries
52
Comanche Public Library
49
Abilene Christian University Library
36
Stamford Carnegie Library
35
67 More
Collection
Texas Digital Newspaper Program
735
Tocker Foundation Grant
453
Oklahoma Digital Newspaper Program
260
Office of Scientific & Technical Information Technical Reports
141
The Baytown Sun
93
Abilene Library Consortium
67
Hockley County Area Newspaper Collection
64
Altus Times-Democrat
57
Polk County Newspapers
55
African-American Newspapers
52
121 More
Degree Department
College of Music
3
Department of Biological Sciences
3
Department of Teacher Education and Administration
3
Department of Counseling, Development and Higher Education
2
Department of Technology and Cognition
2
Chemistry
1
Department of Biology
1
Department of Chemistry
1
Department of Composition
1
Department of English
1
4 More
Degree Discipline
Degree Level
Year
Month
Language
1,271 Matching Results
Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.
Results:
1 - 24 of
1,271
next
Notes on the Acceleration of Iron Ions for the Booster Applications Facility
N/A
Date:
December 1, 2002
Creator:
Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
The J-TAC (Stephenville, Tex.), Vol. 163, No. 7, Ed. 1 Thursday, March 21, 2002
Weekly student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
March 21, 2002
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The J-TAC (Stephenville, Tex.), Vol. 164, No. 11, Ed. 1 Thursday, October 31, 2002
Weekly student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
October 31, 2002
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Calculation of the Mean Energy Loss in the BTA Stripping Foils and Comparison with Measurement
N/A
Date:
July 1, 2002
Creator:
Ahrens, L. & Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Determination of the AGS Injection Kicker Strength from Beam Measurements
N/A
Date:
December 1, 2002
Creator:
Ahrens, L. A. & Gardner, C. J.
Object Type:
Report
System:
The UNT Digital Library
Development of a thermoacoustic natural gas liquefier.
Praxair, in conjunction with the Los Alamos National Laboratory, is developing a new technology, thermoacoustic heat engines and refrigerators, for liquefaction of natural gas. This is the only technology capable of producing refrigeration power at cryogenic temperatures with no moving parts. A prototype, with a projected natural gas liquefaction capacity of 500 gallons/day, has been built and tested. The power source is a natural gas burner. Systems will be developed with liquefaction capacities up to 10,000 to 20,000 gallons per day. The technology, the development project, accomplishments and applications are discussed. In February 2001 Praxair, Inc. purchased the acoustic heat engine and refrigeration development program from Chart Industries. Chart (formerly Cryenco, which Chart purchased in 1997) and Los Alamos had been working on the technology development program since 1994. The purchase included assets and intellectual property rights for thermoacoustically driven orifice pulse tube refrigerators (TADOPTR), a new and revolutionary Thermoacoustic Stirling Heat Engine (TASHE) technology, aspects of Orifice Pulse Tube Refrigeration (OPTR) and linear motor compressors as OPTR drivers. Praxair, in cooperation with Los Alamos National Laboratory (LANL), the licensor of the TADOPTR and TASHE patents, is continuing the development of TASHE-OPTR natural gas powered, natural gas liquefiers. The liquefaction …
Date:
January 1, 2002
Creator:
Wollan, John J.; Swift, Gregory W.; Backhaus, Scott N. & Gardner, David L.
Object Type:
Article
System:
The UNT Digital Library
Geology of the Western Part of Los Alamos National Laboratory (TA-3 to TA-16), Rio Grande Rift, New Mexico
We present data that elucidate the stratigraphy, geomorphology, and structure in the western part of Los Alamos National Laboratory between Technical Areas 3 and 16 (TA-3 and TA-16). Data include those gathered by geologic mapping of surficial, post-Bandelier Tuff strata, conventional and high-precision geologic mapping and geochemical analysis of cooling units within the Bandelier Tuff, logging of boreholes and a gas pipeline trench, and structural analysis using profiles, cross sections, structure contour maps, and stereographic projections. This work contributes to an improved understanding of the paleoseismic and geomorphic history of the area, which will aid in future seismic hazard evaluations and other investigations. The study area lies at the base of the main, 120-m (400-ft) high escarpment formed by the Pajarito fault, an active fault of the Rio Grande rift that bounds Los Alamos National Laboratory on the west. Subsidiary fracturing, faulting, and folding associated with the Pajarito fault zone extends at least 1,500 m (5,000 ft) to the east of the main Pajarito fault escarpment. Stratigraphic units in the study area include upper units of the Tshirege Member of the early Pleistocene Bandelier Tuff, early Pleistocene alluvial fan deposits that predate incision of canyons on this part of the …
Date:
December 1, 2002
Creator:
C.J.Lewis; A.Lavine; S.L.Reneau; J.N.Gardner; R.Channell & C.W.Criswell
Object Type:
Report
System:
The UNT Digital Library
The Rapid Cycling Medical Synchrotron RCMS.
Thirteen hadron beam therapy facilities began operation between 1990 and 2001 - 5 in Europe, 4 in North America, 3 in Japan, and 1 in South Africa [l]. Ten of them irradiate tumors with protons, 2 with Carbon- 12 ions, and 1 with both protons and Carbon-12. The facility with the highest patient throughput - a total of 6 174 patients in 11 years and as many as 150 patient treatments per day -is the Loma Linda University Medical Center, which uses a weak focusing slow cycling synchrotron to accelerate beam for delivery to passive scattering nozzles at the end of rotatable gantries [2, 3,4]. The Rapid Cycling Medical Synchrotron (RCMS) is a second generation synchrotron that, by contrast with the Loma Linda synchrotron, is strong focusing and rapid cycling, with a repetition rate of 30 Hz. Primary parameters for the RCMS are listed in Table 1.
Date:
June 2, 2002
Creator:
Peggs, S.; Barton, D.; Beebe-Wang, J.; Cardona, J.; Brennan, M.; Fischer, W. et al.
Object Type:
Article
System:
The UNT Digital Library
Coincidence Prompt Gamma-Ray Neutron Activation Analysis
The normal prompt gamma-ray neutron activation analysis for either bulk or small beam samples inherently has a small signal-to-noise (S/N) ratio due primarily to the neutron source being present while the sample signal is being obtained. Coincidence counting offers the possibility of greatly reducing or eliminating the noise generated by the neutron source. The present report presents our results to date on implementing the coincidence counting PGNAA approach. We conclude that coincidence PGNAA yields: (1) a larger signal-to-noise (S/N) ratio, (2) more information (and therefore better accuracy) from essentially the same experiment when sophisticated coincidence electronics are used that can yield singles and coincidences simultaneously, and (3) a reduced (one or two orders of magnitude) signal from essentially the same experiment. In future work we will concentrate on: (1) modifying the existing CEARPGS Monte Carlo code to incorporate coincidence counting, (2) obtaining coincidence schemes for 18 or 20 of the common elements in coal and cement, and (3) optimizing the design of a PGNAA coincidence system for the bulk analysis of coal.
Date:
November 10, 2002
Creator:
Gardner, R. P.; Mayo, C. W.; Metwally, W. A.; Zhang, W.; Guo, W. & Shehata, A.
Object Type:
Report
System:
The UNT Digital Library
Characterization of Vadose Zone Sediment: Borehole 299-W23-19 [SX -115] in the S-SX Waste Management Area.
The Tank Farm Vadose Zone Project is led by CH2M HILL Hanford Group, Inc. Their goals include defining risks from past and future single-shell tank farm activities, identifying and evaluating the efficacy of interim measures, and collecting geo-technical information and data. The purpose of these activities is to support future decisions made by the U.S. Department of Energy regarding near-term operations, future waste retrieval, and final closure activities for the single-shell tank Waste Management Areas. To help in this effort, CH2M HILL contracted with scientists at Pacific Northwest National Laboratory to analyze sediment samples collected from borehole 299-W23-19. The conclusions reached from this study support specific mechanisms influencing subsurface migration of contaminants. The mechanisms are supported by the distributions of contaminants beneath tank farms. These observations will help DOE and CH2M HILL identify and implement viable remediation and closure activities.
Date:
February 12, 2002
Creator:
Serne, R. Jeffrey; Schaef, Herbert T.; Bjornstad, Bruce N.; Lanigan, David C.; Gee, Glendon W.; Lindenmeier, Clark W. et al.
Object Type:
Report
System:
The UNT Digital Library
Preparation Effects on the Performance of Silica-Doped Hydrous Titanium Oxide (HTO:Si)-Supported Pt Catalysts for Lean-Burn NOx Reduction by Hydrocarbons
This report describes the development of bulk hydrous titanium oxide (HTO)- and silica-doped hydrous titanium oxide (HTO:Si)-supported Pt catalysts for lean-burn NOx catalyst applications. The effects of various preparation methods, including both anion and cation exchange, and specifically the effect of Na content on the performance of Pt/HTO:Si catalysts, were evaluated. Pt/HTO:Si catalysts with low Na content (< 0.5 wt.%) were found to be very active for NOx reduction in simulated lean-burn exhaust environments utilizing propylene as the major reductant species. The activity and performance of these low Na Pt/HTO:Si catalysts were comparable to supported Pt catalysts prepared using conventional oxide or zeolite supports. In ramp down temperature profile test conditions, Pt/HTO:Si catalysts with Na contents in the range of 3-5 wt.% showed a wide temperature window of appreciable NOx conversion relative to low Na Pt/HTO:Si catalysts. Full reactant species analysis using both ramp up and isothermal test conditions with the high Na Pt/HTO:Si catalysts, as well as diffuse reflectance FTIR studies, showed that this phenomenon was related to transient NOx storage effects associated with NaNO{sub 2}/NaNO{sub 3} formation. These nitrite/nitrate species were found to decompose and release NOx at temperatures above 300 C in the reaction environment (ramp up …
Date:
January 1, 2002
Creator:
GARDNER, TIMOTHY J.; MCLAUGHLIN, LINDA I.; MOWERY, DEBORAH L. & SANDOVAL, RONALD S.
Object Type:
Report
System:
The UNT Digital Library
Coexistence of antiferromagnetic order and superconductivity in CeRh[sub 1[minus]x]M[sub x]In[sub 5](M=Ir and Co)
We report a systematic neutron diffraction study on the coexistence of long-range magnetic order and superconductivity in heavy fermion compounds CeRhl-,M,Ins (M=Ir,Co). In addition to the incommensurate antiferromagnetic component in pure CeRhIn5, new type of antiferromagnetic component is found to concur with appearance of superconductivity in the Ir and Co alloy series. There is no detectable effect of the superconducting transition on magnetic order parameters. We compare those results with similar studies we performed on CeRhIn:, under pressure. We also discuss possible theoretical scenarios.
Date:
December 4, 2002
Creator:
Llobet-Megias, A. (Anna); Christianson, A. D. (Andrew D.); Bao, W. (Wei); Gardner, J. S.; Pagliuso, P. J. (Pascoal J.); Moreno, N. O. et al.
Object Type:
Article
System:
The UNT Digital Library
Evolution of the Spallation Neutron Source Ring Lattice.
Requirements of minimum beam loss for hand-on maintenance and flexibility for future operations are essential for the lattice design of the Spallation Neutron Source (SNS) accumulator ring. During the past seven years, the lattice has evolved from an all-FODO to a FODO/doublet hybrid, the circumference has been increased to accommodate for a higher energy foreseen with a super-conducting RF linac, and the layout has evolved from an {alpha}- to an {Omega}-geometry. Extensive studies are performed to determine working points that accommodate injection painting and minimize beam losses due to space charge and resonances. In this paper, we review the evolution of the SNS ring lattice and discuss the rationales.
Date:
April 8, 2002
Creator:
Wei, J.; Catalan - Lasheras, N.; Fedotov, A.; Gardner, C. J.; Lee, Y. Y.; Papaphilippou, Y. et al.
Object Type:
Article
System:
The UNT Digital Library
Social and Economic Impacts of Outer Continental Shelf Activities on Individuals and Families, Volume 1: Final Report
The final report of a study examining the nature of OCS-related work and its impacts on the lifestyles of individuals and families and on the communities in which they live.
Date:
July 2002
Creator:
Austin, Diane; Coelho, Karen; Gardner, Andrew; Higgins, Rylan & McGuire, Tom
Object Type:
Text
System:
The UNT Digital Library
WASP News, Volume 40, Number 1, June, 2002
Newsletter of the former World War II Women Airforce Service Pilots including news, events, stories about the group's history, and other information of interest to the members.
Date:
June 2002
Creator:
Women Airforce Service Pilots (U.S.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Social and Economic Impacts of Outer Continental Shelf Activities on Individuals and Families, Volume 2: Case Studies of Morgan City and New Iberia, Louisiana
A report of a study which examined the nature of OCS-related work and its impacts on the lifestyle of individuals and families and on the communities in which they live, including case studies of Morgan City and New Iberia, Louisiana.
Date:
July 2002
Creator:
Austin, Diane; Gardner, Andrew; Higgins, Rylan; Schrag-James, Jennifer; Sparks, Shannon & Stauber, Leah
Object Type:
Text
System:
The UNT Digital Library
Pre-treating Seed to Enhance Germination of Desert Shrubs
Creosotebush [Larrea tridentata (D.C.) Cav.] and white bursage [Ambrosia dumosa (A. Gray) W.W. Payne] seeds were subjected to pre-treatments of rinsing and soaking in water and thiourea to enhance germination in laboratory experiments. The effects of darkness, temperature, seed source, and soil moisture were also evaluated in the laboratory. The best pre-treatment from the laboratory experiments, rinsing with water for 36 hours followed by drying, was field-tested at Fort Irwin, California. Two sites and two seeding dates (early March and mid April) were determined for each site. Five mulch treatments (no mulch, straw, gravel, chemical stabilizer, and plastic) were evaluated in combination with the seed pre-treatments. Field emergence was greatly enhanced with the seed pre-treatment for white bursage during the March (18-42% increase in germination) and April seedings (16-23% increase in germination). Creosotebush showed poor germination during March (2-5%) when soil temperatures averaged 15 C, but germination increased during the April trials (6-43%) when soil temperatures averaged 23 C. The seed pre-treatment during the April trials increased germination from 16-23%. The plastic mulch treatment increased germination dramatically during both the March and April trials. The plastic mulch increased soil temperatures (8-10 C)and maintained high humidity during germination. Both the chemical …
Date:
June 1, 2002
Creator:
Ostler, W. K.; Anderson, D. C. & Hansen, D. J.
Object Type:
Article
System:
The UNT Digital Library
On the Development of a Java-Based Tool for Multifidelity Modeling of Coupled Systems: LDRD Final Report
This report describes research and development of methods to couple vastly different subsystems and physical models and to encapsulate these methods in a Java{trademark}-based framework. The work described here focused on developing a capability to enable design engineers and safety analysts to perform multifidelity, multiphysics analyses more simply. In particular this report describes a multifidelity algorithm for thermal radiative heat transfer and illustrates its performance. Additionally, it describes a module-based computer software architecture that facilitates multifidelity, multiphysics simulations. The architecture is currently being used to develop an environment for modeling the effects of radiation on electronic circuits in support of the FY 2003 Hostile Environments Milestone for the Accelerated Strategic Computing Initiative.
Date:
November 1, 2002
Creator:
GARDNER,DAVID R.; CASTRO,JOSEPH P.; HENNIGAN,GARY L.; GONZALES,MARK A. & YOUNG,MICHAEL F.
Object Type:
Report
System:
The UNT Digital Library
Residual stress measurement in YBCO thin films.
Residual stress in YBCO films on Ag and Hastelloy C substrates was determined by using 3-D optical interferometry and laser scanning to measure the change in curvature radius before and after film deposition. The residual stress was obtained by appropriate analysis of curvature measurements. Consistent with residual thermal stress calculations based on the thermal expansion coefficient mismatch between the substrates and YBCO film, the measured residual stress in the YBCO film on Hastelloy C substrate was tensile, while it was compressive on the Ag substrate. The stress values measured by the two techniques were generally in good agreement, suggesting that optical interferometry and laser scanning have promise for measuring residual stresses in thin films.
Date:
May 13, 2002
Creator:
Cheon, J. H. & Singh, J. P.
Object Type:
Article
System:
The UNT Digital Library
Electron Cloud Effects in High Intensity Proton Accelerators
One of the primary concerns in the design and operation of high-intensity proton synchrotrons and accumulators is the electron cloud and associated beam loss and instabilities. Electron-cloud effects are observed at high-intensity proton machines like the Los Alamos National Laboratory's PSR and CERN's SPS, and investigated experimentally and theoretically. In the design of next-generation high-intensity proton accelerators like the Spallation Neutron Source ring, emphasis is made in minimizing electron production and in enhancing Landau damping. This paper reviews the present understanding of the electron-cloud effects and presents mitigation measures.
Date:
April 14, 2002
Creator:
Wei, J. & Macek, R. J.
Object Type:
Article
System:
The UNT Digital Library
A high precision model of Booster Tune Control
N/A
Date:
February 1, 2002
Creator:
Brown, K.; Vanasselt, W. & Meng, W.
Object Type:
Report
System:
The UNT Digital Library
Summary of Chariton Valley Switchgrass Co-Fire Testing at the Ottumwa Generating Station in Chillicothe, Iowa: Milestone Completion Report
Results of the switchgrass co-firing tests conducted at the Ottumwa Generating Station in Chillicothe, Iowa as part of the Chariton Valley Biomass Project. After several years of planning, the Chariton Valley Biomass Project successfully completed two months of switchgrass co-fire testing at the Ottumwa Generating Station (OGS) in Chillicothe, Iowa. From November 30, 2000, through January 25, 2001, the switchgrass team co-fired 1,269 tons (1,151 tonnes) of switchgrass at rates up to 16.8 tons/h (15.2 tonne/h), representing about 3% heat input to the 725-MW power plant. Stack testing was completed when co-firing switchgrass and when burning only coal. Fuel and ash samples were collected for analysis, and boiler performance and emissions data were collected. Numerous improvements were made to the feed-handling equipment during testing. The co-fire testing was completed with no environmental incidents, no injuries to personnel, and no loss in electricity output from OGS. The goals of the this--the first of three rounds of co-fire tests--were: to identify the effects of co-firing on boiler performance, to measure any changes in emissions during co-firing, and to gather information to improve the design of the switchgrass handling equipment. All three of these goals were met. The design target for the switchgrass …
Date:
July 1, 2002
Creator:
Amos, W.
Object Type:
Report
System:
The UNT Digital Library
THE SNS RING DIPOLE MAGNETIC FIELD QUALITY.
The large acceptance and compact size of the Spallation Neutron Source (SNS) ring implies the use of short, large aperture dipole magnets, with significant end field errors. The SNS will contain 32 such dipoles. We report magnetic field measurements of the first 16 magnets. The end field errors have been successfully compensated by the use of iron bumps. For 1.0 GeV protons, the magnets have been shimmed to meet the 0.01% specification for rms variation of the integral field. At 1.3 GeV, the rms variation is 0.036%. The load on the corrector system at 1.3 GeV will be reduced by the use of sorting.
Date:
June 3, 2002
Creator:
Wanderer, P.; Jackson, J.; Jain, A.; Lee, Y. Y.; Meng, W.; Papaphilippou, I. et al.
Object Type:
Article
System:
The UNT Digital Library
BRIGHT Lights, BIG City: Massive Galaxies, Giant Ly-A Nebulae, and Proto-Clusters
High redshift radio galaxies are great cosmological tools for pinpointing the most massive objects in the early Universe: massive forming galaxies, active super-massive black holes and proto-clusters. They report on deep narrow-band imaging and spectroscopic observations of several z > 2 radio galaxy fields to investigate the nature of giant Ly-{alpha} nebulae centered on the galaxies and to search for over-dense regions around them. They discuss the possible implications for our understanding of the formation and evolution of massive galaxies and galaxy clusters.
Date:
August 1, 2002
Creator:
van Breugel, W.; Reuland, M.; de Vries, W.; Stanford, A.; Dey, A.; Kurk, J. et al.
Object Type:
Article
System:
The UNT Digital Library