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52
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Texas Attorney General Opinion: GA-0177
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification; Whether a district may honor the current employment contract of a superintendent's relative whose original hiring violated chapter 573 of the Government Code (RQ-0175-GA)
Date:
April 12, 2004
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Medicare Home Health — Benefits and Payments
None
Date:
April 12, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Capital Punishment: Summary of Supreme Court Decisions of the 2003-2004 Term
This report is a Summary of Supreme Court Decisions of the 2003-2004 Term related to Capital Punishment.
Date:
August 12, 2004
Creator:
Wallace, Paul Starett, Jr.
Object Type:
Report
System:
The UNT Digital Library
North Korea: Terrorism List Removal?
None
Date:
August 12, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Anti-Tax-Shelter and Other Revenue-Raising Tax Proposals
This report is on Anti-Tax-Shelter and Other revenue-raising Tax Proposals.
Date:
January 12, 2004
Creator:
Gravelle, Jane G.
Object Type:
Report
System:
The UNT Digital Library
Taxes, Exports, and International Investment: Proposals in the 108th Congress
None
Date:
January 12, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The MC&A Council at SSC RF-IPPE as a Coordinating Body for System Sustainability
The State Scientific Center of the Russian Federation - Institute of Physics and Power Engineering's (SSC RF - IPPE) practice of nuclear material control and accounting (MC&A) has undergone significant changes during the period of cooperation with U.S. national laboratories from 1995 to the present. These changes corresponded with general changes of the Russian system of state control and accounting of nuclear materials resulting from the new Concept of the System for State Regulating and Control of Nuclear Materials (1996) and further regulatory documents, which were developed and implemented to take into account international experience in the MC&A [1]. During the upgrades phase of Russian-U.S. cooperation, an MC&A laboratory was specially created within the SSC RF - IPPE for the purpose of guiding the creation of the upgraded MC&A system, coordinating the activities of all units involved in the creation of this system, and implementing a unified technical policy during the transition period. After five years of operation of the MC&A laboratory and the implementation of new components for the upgraded MC&A system, it was decided that a greater degree of attention must be paid to the MC&A system's operation in addition to the coordination activities carried out by the …
Date:
July 12, 2004
Creator:
Poplavko, V.; Skorkin, V. & Myakishev, G.
Object Type:
Article
System:
The UNT Digital Library
DESIGN, CONSTRUCTION, AND STATUS OF ALL NIOBIUM SUPERCONDUCTING PHOTOINJECTOR AT BNL.
We present here the design and construction of an all niobium superconducting RF injector to generate high average current, high brightness electron beam. A 1/2 cell superconducting cavity has been designed, built, and tested. A cryostat has been built to cool the cavity to {approx}2 K. The RF system can deliver up to 500 W at 1.3 GHz to the cavity. A mode-locked Nd:YVO{sub 4} laser, operating at 266 nm with 0.15 W average power, phase locked to the RF, will irradiate a laser cleaned Nb surface at the back wall of the cavity. Description of critical components and their status are presented in the paper. Based on DC measurements, QE of up to 10{sup 4} can be expected from such cavity.
Date:
May 12, 2004
Creator:
SRINIVASAN-RAO,T. BEN-ZVI,I. BURRILL,A. CITVER,G. ET AL.
Object Type:
Article
System:
The UNT Digital Library
Experimental Studies of Electron and Gas Sources in a Heavy-Ion Beam
None
Date:
October 12, 2004
Creator:
Molvik, A W; Cohen, R H; Friedman, A; Covo, M K; Lund, S M; Seidl, P A et al.
Object Type:
Article
System:
The UNT Digital Library
Computation Directorate Annual Report 2003
Big computers are icons: symbols of the culture, and of the larger computing infrastructure that exists at Lawrence Livermore. Through the collective effort of Laboratory personnel, they enable scientific discovery and engineering development on an unprecedented scale. For more than three decades, the Computation Directorate has supplied the big computers that enable the science necessary for Laboratory missions and programs. Livermore supercomputing is uniquely mission driven. The high-fidelity weapon simulation capabilities essential to the Stockpile Stewardship Program compel major advances in weapons codes and science, compute power, and computational infrastructure. Computation's activities align with this vital mission of the Department of Energy. Increasingly, non-weapons Laboratory programs also rely on computer simulation. World-class achievements have been accomplished by LLNL specialists working in multi-disciplinary research and development teams. In these teams, Computation personnel employ a wide array of skills, from desktop support expertise, to complex applications development, to advanced research. Computation's skilled professionals make the Directorate the success that it has become. These individuals know the importance of the work they do and the many ways it contributes to Laboratory missions. They make appropriate and timely decisions that move the entire organization forward. They make Computation a leader in helping LLNL achieve …
Date:
March 12, 2004
Creator:
Crawford, D L; McGraw, J R; Ashby, S F; McCoy, M G; Michels, T C & Eltgroth, P G
Object Type:
Report
System:
The UNT Digital Library
Development of a GIS Based Dust Dispersion Modeling System.
With residential areas moving closer to military training sites, the effects upon the environment and neighboring civilians due to dust generated by training exercises has become a growing concern. Under a project supported by the Strategic Environmental Research and Development Program (SERDP) of the Department of Defense, a custom application named DUSTRAN is currently under development that integrates a system of EPA atmospheric dispersion models with the ArcGIS application environment in order to simulate the dust dispersion generated by a planned training maneuver. This integration between modeling system and GIS application allows for the use of real world geospatial data such as terrain, land-use, and domain size as input by the modeling system. Output generated by the modeling system, such as concentration and deposition plumes, can then be displayed upon accurate maps representing the training site. This paper discusses the development of this integration between modeling system and Arc GIS application.
Date:
August 12, 2004
Creator:
Rutz, Frederick C.; Hoopes, Bonnie L.; Crandall, Duard W. & Allwine, K Jerry
Object Type:
Article
System:
The UNT Digital Library
Simulation of Spheromak Evolution and Energy Confinement
Simulation results are presented that illustrate the formation and decay of a spheromak plasma driven by a coaxial electrostatic plasma gun, and that model the energy confinement of the plasma. The physics of magnetic reconnection during spheromak formation is also illuminated. The simulations are performed with the three-dimensional, time-dependent, resistive magnetohydrodynamic NIMROD code. The dimensional, simulation results are compared to data from the SSPX spheromak experiment at the Lawrence Livermore National Laboratory. The simulation results are tracking the experiment with increasing fidelity (e.g., improved agreement with measurements of the magnetic field, fluctuation amplitudes, and electron temperature) as the simulation has been improved in its representations of the geometry of the experiment (plasma gun and flux conserver), the magnetic bias coils, and the detailed time dependence of the current source driving the plasma gun, and uses realistic parameters. The simulations are providing a better understanding of the dominant physics in SSPX, including when the flux surfaces close and the mechanisms limiting the efficiency of electrostatic drive.
Date:
November 12, 2004
Creator:
Cohen, B; Hooper, E; Cohen, R; Hill, D; McLean, H; Wood, R et al.
Object Type:
Article
System:
The UNT Digital Library
Deflagration of HMX-Based Explosives at High Temperatures and Pressures
We measure the deflagration behavior of energetic materials at extreme conditions (up to 520K and 1 GPa) in the LLNL High Pressure Strand Burner, thereby obtaining reaction rate data for prediction of violence of thermal explosions. The apparatus provides both temporal pressure history and flame time-of-arrival information during deflagration, allowing direct calculation of deflagration rate as a function of pressure. Samples may be heated before testing. Here we report the deflagration behavior of several HMX-based explosives at pressures of 10-600 MPa and temperatures of 300-460 K. We find that formulation details are very important to overall deflagration behavior. Formulations with high binder content (>15 wt%) deflagrate smoothly over the entire pressure range regardless of particle size, with a larger particle size distribution leading to a slower reaction. The deflagration follows a power law function with the pressure exponent being unity. Formulations with lower binder content ({le} 10% or less by weight) show physical deconsolidation at pressures over 100-200 MPA, with transition to a rapid erratic deflagration 10-100 times faster. High temperatures have a relatively minor effect on the deflagration rate until the HMX {beta} {yields} {delta} phase transition occurs, after which the deflagration rate increases by more than a factor …
Date:
May 12, 2004
Creator:
Maienschein, J. L.; Wardell, J. F.; DeHaven, M. R. & Black, C. K.
Object Type:
Article
System:
The UNT Digital Library
U.S. District and Circuit Court Nominations: A Diagram of Customary Procedures
None
Date:
February 12, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Optical Propagation Modeling for the National Ignition Facility
Optical propagation modeling of the National Ignition Facility has been utilized extensively from conceptual design several years ago through to early operations today. In practice we routinely (for every shot) model beam propagation starting from the waveform generator through to the target. This includes the regenerative amplifier, the 4-pass rod amplifier, and the large slab amplifiers. Such models have been improved over time to include details such as distances between components, gain profiles in the laser slabs and rods, transient optical distortions due to the flashlamp heating of laser slabs, measured transmitted and reflected wavefronts for all large optics, the adaptive optic feedback loop, and the frequency converter. These calculations allow nearfield and farfield predictions in good agreement with measurements.
Date:
January 12, 2004
Creator:
Williams, W. H.; Auerbach, J. M.; Henesian, M. A.; Jancaitis, K. S.; Manes, K. R.; Mehta, N. C. et al.
Object Type:
Article
System:
The UNT Digital Library
Thermal Expansion of AuIn2
The thermal expansion of AuIn{sub 2} gold is of great interest in soldering technology. Indium containing solders have been used to make gold wire interconnects at low soldering temperature and over time, AuIn{sub 2} is formed between the gold wire and the solder due to the high heat of formation and the high inter-metallic diffusion of indium. Hence, the thermal expansion of AuIn{sub 2} alloy in comparison with that of the gold wire and the indium-containing solder is critical in determining the integrity of the connection. We present the results of x-ray diffraction measurement of the coefficient of linear expansion of AuIn{sub 2} as well as the bulk expansion and density changes over the temperature range of 30 to 500 C.
Date:
July 12, 2004
Creator:
Saw, C K & Siekhaus, W J
Object Type:
Article
System:
The UNT Digital Library
Guatemala: Political Conditions, Elections, and Human Rights
This report presents political conditions, elections, and Human Rights of Guatemala.
Date:
August 12, 2004
Creator:
Taft-Morales, Maureen
Object Type:
Report
System:
The UNT Digital Library
Presidential Grave Sites: Maintenance and Congressional District Locations
None
Date:
July 12, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
On The Use Of Models To Assess Foot-And-Mouth Disease Transmission And Control
The 2001 outbreaks of foot-and-mouth disease (FMD) in Europe (Ferguson et al. 2001a, 2001b; Bouma et al. 2003) and concern about the possibility of an intentional introduction of a devastating foreign animal disease triggered renewed interest in both theoretical and experimental research related to FMD. Theoretical models of disease transmission, which influenced the tactical decisions of the United Kingdom (UK) government during the epidemic (Taylor 2003), resulted in large numbers of uninfected animals being slaughtered. After the epidemic, the adopted control policies were sharply criticized (Kitching 2004;, Taylor 2003). Still, the role of computationaL modeling for analyzing the scope of the epidemic and devising control strategies was recognized as substantial and necessary.
Date:
July 12, 2004
Creator:
Kostova-Vassilevska, Tanya
Object Type:
Report
System:
The UNT Digital Library
Heritage Areas: Background, Proposals, and Current Issues
This report focuses on heritage areas designated by Congress, and related issues and legislation.
Date:
July 12, 2004
Creator:
Vincent, Carol Hardy & Whiteman, David
Object Type:
Report
System:
The UNT Digital Library
The Asian Development Bank
This report covers the creation of the Asian Development Bank and it's relationship with the United States government.
Date:
February 12, 2004
Creator:
Weiss, Martin A.
Object Type:
Report
System:
The UNT Digital Library
Congressional Budget Resolutions: Motions to Instruct Conferees
This report provides an overview of the motions to instruct conferees on the congressional budget resolutions.
Date:
July 12, 2004
Creator:
Keith, Robert
Object Type:
Report
System:
The UNT Digital Library
Validation of the Use of the NMR MOUSE for Detection of Inhomogeneities in DC745 at Production
In an effort to develop a QA/QC protocol to be used in the development of new pads, we are employing a tabletop unilateral NMR relaxometer called the NMR MOUSE (MObile Universal Surface Explorer). Model materials of varying crosslink density first demonstrated the applicability of the method. Analysis of deformed pads returned from service has been shown to be clearly distinguishable by the NMR MOUSE. Finally, we have quantified the variables associated with taking the relevant measurements and believe that the NMR MOUSE is a viable production and surveillance tool for screening of future DC745 parts.
Date:
November 12, 2004
Creator:
Chinn, S.; Sawvel, A. & Maxwell, R.
Object Type:
Report
System:
The UNT Digital Library
The role of Hydrogen and Creep in Intergranular Stress Corrosion Cracking of Alloy 600 and Alloy 690 in PWR Primary Water Environments ? a Review
Intergranular attack (IGA) and intergranular stress corrosion cracking (IGSCC) of Alloy 600 in PWR steam generator environment has been extensively studied for over 30 years without rendering a clear understanding of the essential mechanisms. The lack of understanding of the IGSCC mechanism is due to a complex interaction of numerous variables such as microstructure, thermomechanical processing, strain rate, water chemistry and electrochemical potential. Hydrogen plays an important role in all these variables. The complexity, however, significantly hinders a clearer and more fundamental understanding of the mechanism of hydrogen in enhancing intergranular cracking via whatever mechanism. In this work, an attempt is made to review the role of hydrogen based on the current understanding of grain boundary structure and chemistry and intergranular fracture of nickel alloys, effect of hydrogen on electrochemical behavior of Alloy 600 and Alloy 690 (e.g. the passive film stability, polarization behavior and open-circuit potential) and effect of hydrogen on PWSCC behavior of Alloy 600 and Alloy 690. Mechanistic studies on the PWSCC are briefly reviewed. It is concluded that further studies on the role of hydrogen on intergranular cracking in both inert and primary side environments are needed. These studies should focus on the correlation of the …
Date:
July 12, 2004
Creator:
Rebak, R B & Hua, F H
Object Type:
Article
System:
The UNT Digital Library