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738 Matching Results
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[Boy Wearing a Mask]
Photograph of a young boy wearing a mask at the Mexic-Arte Museum's annual Día de los Muertos celebration. The mask is hand decorated. The boy wears a red and green tie dye shirt.
Date:
October 30, 2004
Creator:
Mexic-Arte Museum (Austin, Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
State Sales and Use Tax Analysis Report: Second Quarter, 2004
Quarterly publication of the Texas Comptroller's Office regarding sales and use tax in the state of Texas, including an analysis by county, analysis by industry, and related notes.
Date:
November 30, 2004
Creator:
Texas. Comptroller's Office.
Object Type:
Report
System:
The Portal to Texas History
[Student holds up a book in class to show everyone the pictures]
Student holds up a book so everyone in the class can see the pictures.
Date:
November 30, 2004
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
TDNA Monthly Office Manager's Report: June 2004
Monthly report written by the Texas Daily Newspaper Association's (TDNA's) office manager, Darla Thompson, to Phil Berkebile providing a summary of revenues and account balances, programs, meetings, and other activities in the office during the previous month.
Date:
June 30, 2004
Creator:
Thompson, Darla
Object Type:
Report
System:
The UNT Digital Library
TDNA Monthly Office Manager's Report: January 2004
Monthly report written by the Texas Daily Newspaper Association's (TDNA's) office manager, Darla Thompson, to Phil Berkebile providing a summary of revenues and account balances, programs, meetings, and other activities in the office during the previous month.
Date:
January 30, 2004
Creator:
Thompson, Darla
Object Type:
Report
System:
The UNT Digital Library
TDNA Monthly Office Manager's Report: November/December 2004
Monthly report written by the Texas Daily Newspaper Association's (TDNA's) office manager, Darla Thompson, to Phil Berkebile providing a summary of revenues and account balances, programs, meetings, and other activities in the office during the previous months. The header states that no officer report has been done for November/December as TDNA moved offices.
Date:
November 30, 2004
Creator:
Thompson, Darla
Object Type:
Report
System:
The UNT Digital Library
TDNA Monthly Office Manager's Report: April 2004
Monthly report written by the Texas Daily Newspaper Association's (TDNA's) office manager, Darla Thompson, to Phil Berkebile providing a summary of revenues and account balances, programs, meetings, and other activities in the office during the previous month.
Date:
April 30, 2004
Creator:
Thompson, Darla
Object Type:
Report
System:
The UNT Digital Library
Funding Plant and Animal Health Emergencies: Transfers from the Commodity Credit Corporation
None
Date:
July 30, 2004
Creator:
Monke, Jim
Object Type:
Report
System:
The UNT Digital Library
Synthesis of Novel Extended Phases of Molecular Solids at High Pressures and Temperatures
This study is for in-situ investigation of chemical bonding and molecular structure of low z-elements and simple molecular solids at high pressures and temperatures using 3rd-generation synchrotron x-ray diffraction. To understand the contribution of the empty d-electron orbital of Mg in relation to the formation of molecular solids like MgO, which is one of the important Earth lower mantle materials and MgB{sub 2}, which has recently been the focus of intense superconducting material research, we have performed double-sided laser heating experiments using a diamond anvil cell (DAC). Understanding the structural stability and the formation of the above Mg-compounds requires studying Mg itself as well as the relevant compounds. BL10XU at the Spring-8 was used to study phase stability and make accurate equation of state (EOS) determinations of Mg coupled with external heating and the double-sided laser heating technique. Monochromatic x-ray at 30 keV (0.4135 {angstrom}) was focused to about 40 {micro}m at the sample and the diffracted x-ray were recorded using a high-resolution image plate (3000 x 3000 pixels with a 0.1 mm resolution per pixel). EOS parameters for hcp and bcc Mg were determined by fitting to a Birch-Murnaghan equation. An isothermal compression of Mg at 300 K up …
Date:
March 30, 2004
Creator:
Yoo, C; Evans, W & Cynn, H
Object Type:
Report
System:
The UNT Digital Library
Effective Operators in the NCSM Formalism
No-core shell model (NCSM) calculations using ab initio effective interactions are very successful in reproducing the experimental nuclear spectra. While a great deal of work has been directed toward computing effective interactions from bare nucleon-nucleon (NN) and three-nucleon forces, less progress has been made in calculating the effective operators. Thus, except for the relative kinetic energy, the proton radius, and the NN pair density, all investigations have used bare operators. We apply the Lee-Suzuki procedure to general two-body operators, investigating the importance of the approximations involved. In particular we concentrate on the limitations of the two-body cluster approximation.
Date:
November 30, 2004
Creator:
Stetcu, I; Barrett, B R; Navratil, P & Vary, J P
Object Type:
Article
System:
The UNT Digital Library
Feasibility Study on Using Two Mixer Pumps for Tank 241-AY-102 Waste Mixing
The current waste retrieval plan at Hanford calls for using two mixer pumps to mix the waste stored in double-shell Tank 214-AY-102. The objective of this evaluation was to determine whether two rotating 300-hp mixer pumps placed 22 ft (6.7 m) off-center in the tank could adequately mix the AY-102 waste. The tank currently contains high-level waste that is 248 inches (6.3 m) deep, comprising 62 inches (1.58 m) of sludge and 186 inches (4.72 m) of supernatant liquid (Galbraith et al. 2002). Based on the available data, AY-102 waste properties were determined, including the densities of liquid and agglomerated settled solids and crystals, the volume fraction of settled solids, the solid particle size distribution, the liquid and slurry viscosities, and the yield stress in shear (shear strength) of the settled solids layer. To evaluate the likely and bounding cases of AY-102 waste mixing, sludge erosion modeling was performed with a median value of 1,090 Pa (likely condition) and a conservative (more difficult to erode) 97.5 percentile value of 2,230 Pa for shear strength. According to model predictions, the two rotating mixer pumps would erode 89% of the sludge with shear strength of 1,090 Pa. They would erode sludge up …
Date:
August 30, 2004
Creator:
Onishi, Yasuo & Wells, Beric E.
Object Type:
Report
System:
The UNT Digital Library
Continuing Appropriations Acts: Brief Overview of Recent Practices
This report is divided into two segments. The first segment provides the most recent developments regarding the FY2005 continuing resolutions (CRs). The second segment provides information on the history of CRs; the nature, scope, and duration of CRs during the last 30 years; the various types of CRs that have been enacted; and an overview of those instances when budget authority has lapsed and a funding gap has resulted.
Date:
November 30, 2004
Creator:
Streeter, Sandy
Object Type:
Report
System:
The UNT Digital Library
Kosovo and U.S. Policy
This report discusses the current political state of Kosovo, which, on February 7, 2008, declared its independence from Serbia. Since then, Serbia has contested Kosovo's declaration of independence, leading to parallel governing institutions and ongoing talks between the two nations. This report discusses challenges Kosovo faces regarding international recognition and the status of its ethnic minorities. This report also discusses Kosovo's relationship with the United States, and U.S. foreign aid efforts to Kosovo.
Date:
January 30, 2004
Creator:
Woehrel, Steven & Kim, Julie
Object Type:
Report
System:
The UNT Digital Library
Fabrication of Mo/Cu Multilayer and Bilayer Transition Edge Sensors
We are developing cryogenic high-resolution x-ray, {gamma}-ray and neutron spectrometers based on superconducting Mo/Cu transition edge sensors. Here we discuss the sensor design for different applications, present the photolithographic fabrication techniques, and outline future detector development to increase spectrometer sensitivity.
Date:
September 30, 2004
Creator:
Ali, Z. A.; Drury, O. B.; Cunningham, M. F.; Chesser, J. M.; Barbee, T. W., Jr. & Friedrich, S.
Object Type:
Article
System:
The UNT Digital Library
Comparison of Ramsauer and Optical Model Neutron Angular Distributions
The nuclear Ramsauer model is a semi-classical, analytic approximation to nucleon-nucleus scattering that reproduces total cross section data at the 1% level for A > 40, E{sub n} = 5-60 MeV with 7-10 parameters. A quick overview of the model is given, demonstrating the model's utility in nuclear data evaluation. The Ramsauer model predictions for reaction cross section, elastic cross section, and elastic scattering angular distributions are considered. In a recent paper it has been shown that the nuclear Ramsauer model does not do well in predicting details of the angular distribution of neutron elastic scattering for incident energies of less than 60 MeV for {sup 208}Pb. However, in this contribution it is demonstrated that the default angular bin dispersion most widely used in Monte Carlo transport codes is such that the observed differences in angular shapes are on too fine a scale to affect transport calculations. Simple studies indicate that 512-2048 bins are necessary to achieve the dispersion required for calculations to be sensitive to the observed discrepancies in angular distributions.
Date:
September 30, 2004
Creator:
McNabb, D. P.; Anderson, J. D.; Bauer, R. W.; Dietrich, F. S.; Grimes, S. M. & Hagmann, C. A.
Object Type:
Article
System:
The UNT Digital Library
Global Security Rule Sets An Analysis of the Current Global Security Environment and Rule Sets Governing Nuclear Weapons Release
America is in a unique position in its history. In maintaining its position as the world's only superpower, the US consistently finds itself taking on the role of a global cop, chief exporter of hard and soft power, and primary impetus for globalization. A view of the current global situation shows an America that can benefit greatly from the effects of globalization and soft power. Similarly, America's power can be reduced significantly if globalization and its soft power are not handled properly. At the same time, America has slowly come to realize that its next major adversary is not a near peer competitor but terrorism and disconnected nations that seek nuclear capabilities. In dealing with this new threat, America needs to come to terms with its own nuclear arsenal and build a security rule set that will establish for the world explicitly what actions will cause the US to consider nuclear weapons release. This rule set; however, needs to be established with sensitivity to the US's international interests in globalization and soft power. The US must find a way to establish its doctrine governing nuclear weapons release without threatening other peaceful nations in the process.
Date:
September 30, 2004
Creator:
Mollahan, K & Nattrass, L
Object Type:
Report
System:
The UNT Digital Library
A 10 kHz Short-Stroke Rotary Fast Tool Servo
None
Date:
August 30, 2004
Creator:
Montesanti, R C & Trumper, D L
Object Type:
Article
System:
The UNT Digital Library
PROPOSAL FOR A SILICON VERTEX TRACKER (VTX) FOR THE PHENIX EXPERIMENT.
We propose the construction of a Silicon Vertex Tracker (VTX) for the PHENIX experiment at RHIC. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometers. Our prime motivation is to provide precision measurements of heavy-quark production (charm and beauty) in A+A, p(d)+A, and polarized p+p collisions. These are key measurements for the future RHIC program, both for the heavy ion program as it moves from the discovery phase towards detailed investigation of the properties of the dense nuclear medium created in heavy ion collisions, and for the exploration of the nucleon spin-structure functions. In addition, the VTX will also considerably improve other measurements with PHENIX. The main physics topics addressed by the VTX are: (1) Hot and dense strongly interacting matter--Potential enhancement of charm production; Open beauty production; Flavor dependence of jet quenching and QCD energy loss; Accurate charm reference for quarkonium; Thermal dilepton radiation; High p{sub T} phenomena with light flavors above 10-15 GeV/c in p{sub T}; and Upsilon spectroscopy in the e{sup +}e{sup -} decay channel. (2) Gluon spin structure of the nucleon--{Delta}G/G with charm; {Delta}G/G with beauty; and x dependence of {Delta}G/G with {gamma}-jet correlations. (3) Nucleon structure in nuclei--Gluon shadowing over …
Date:
March 30, 2004
Creator:
AKIBA,Y.
Object Type:
Report
System:
The UNT Digital Library
Sealed Combustion System With Diagnostic Self-Tuning.
This task grew out of a proposal to develop a ''concept'' oil-fired heating system that would incorporate advanced technologies available and suitable for a residential system. Discussions among the program and project personnel resulted in the identification of a sealed combustion system as of programmatic interest and the objective was to develop an approach to a sealed system with diagnostic self-tuning. The major conclusion with regard to the specific objective for this task is that a measurement of the static pressure in the input pipe can be used to provide a measure of the excess air for a limit control. Its implementation would require a suitable pressure sensor, and a circuit to combine its output signal, at the appropriate time in the operating cycle, to the burner control. The sensor and control combination will also have to be tested successfully under all conceivable contingencies that can cause the airflow to decrease. It could also be implemented, possibly even more reliably, if a mass flow sensor, such as is used in automobile engines and hence may be cheap, could be used. The pressure measurements reported here, both steady and transient, represent only the subset of a much larger set that gave …
Date:
September 30, 2004
Creator:
Krishna, C. R.
Object Type:
Report
System:
The UNT Digital Library
Health Insurance Coverage of Children, 2003
In 2003, 9.1 million children went without health insurance in the U.S. This was not significantly different than in 2002. However, for the third year in a row, the number of children covered by employment-based health insurance dropped but was more than offset by the increase in public coverage. This report provides an overview of the health insurance coverage of children in 2003.
Date:
August 30, 2004
Creator:
Peterson, Chris L.
Object Type:
Report
System:
The UNT Digital Library
Ab Initio No-Core Shell Model Calculations Using Realistic Two- and Three-Body Interactions
There has been significant progress in the ab initio approaches to the structure of light nuclei. One such method is the ab initio no-core shell model (NCSM). Starting from realistic two- and three-nucleon interactions this method can predict low-lying levels in p-shell nuclei. In this contribution, we present a brief overview of the NCSM with examples of recent applications. We highlight our study of the parity inversion in {sup 11}Be, for which calculations were performed in basis spaces up to 9{Dirac_h}{Omega} (dimensions reaching 7 x 10{sup 8}). We also present our latest results for the p-shell nuclei using the Tucson-Melbourne TM three-nucleon interaction with several proposed parameter sets.
Date:
November 30, 2004
Creator:
Navratil, P; Ormand, W E; Forssen, C & Caurier, E
Object Type:
Article
System:
The UNT Digital Library
Turbulence Kinetic Energy in the Oklahoma City Urban Environment
The Joint URBAN 2003 field experiment took place in Oklahoma City, Oklahoma, during July 2003 to explore the effect of an urban canopy on the transport and diffusion of a passive tracer released in an urban area. Over one hundred three-dimensional sonic anemometers were deployed in and around the urban area to monitor wind speed, direction, and turbulence during releases of SF6. Deployment locations include a profile of eight sonic anemometers mounted on a crane located 1 km north (typically downwind) of the central business district, and several surface meteorological towers within an urban canyon.
Date:
March 30, 2004
Creator:
Lundquist, J K; Leach, M & Gouveia, F
Object Type:
Article
System:
The UNT Digital Library
DOE Light Truck Clean Diesel (LTCD) Program Final Caterpillar Public Report Light Truck Clean Diesel Program
The US Department of Energy and Caterpillar entered a Cooperative Agreement to develop compression ignition engine technology suitable for the light truck/SUV market. Caterpillar, in collaboration with a suitable commercialization partner, developed a new Compression Ignition Direct Injection (CIDI) engine technology to dramatically improve the emissions and performance of light truck engines. The overall program objective was to demonstrate engine prototypes by 2004, with an order of magnitude emission reduction while meeting challenging fuel consumption goals. Program emphasis was placed on developing and incorporating cutting edge technologies that could remove the current impediments to commercialization of CIDI power sources in light truck applications. The major obstacle to commercialization is emissions regulations with secondary concerns of driveability and NVH (noise, vibration and harshness). The target emissions levels were 0.05 g/mile NOx and 0.01 g/mile PM to be compliant with the EPA Tier 2 fleet average requirements of 0.07 g/mile and the CARB LEV 2 of 0.05 g/mile for NOx, both have a PM requirement of 0.01 g/mile. The program team developed a combustion process that fundamentally shifted the classic NOx vs. PM behavior of CIDI engines. The NOx vs. PM shift was accomplished with a form of Homogeneous Charge Compression Ignition …
Date:
September 30, 2004
Creator:
Fluga, Eric
Object Type:
Report
System:
The UNT Digital Library
[Letter from Philip A. Berkebile to Wesley R. Turner, September 30, 2004]
Letter from Philip A. Berkebile to Wesley R. Turner on September 30, 2004 with the subject Board Nominations. The letter begins with the news that President Donnis Baggett has appointed Turner to serve as chairman on the 2005 board of directors nomination committee and have enclosed information relation to the nomination process to select candidates for the TDNA board of directors for the year 2005.
Date:
September 30, 2004
Creator:
Berkebile, Philip A.
Object Type:
Letter
System:
The UNT Digital Library