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[Students read to each other at Seminary Hills Elementary]
Students read to each other at Seminary Hills Elementary in Fort Worth, Texas.
Date:
December 6, 2004
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Students and their teacher pose with the books at Seminary Hills Elementary]
Children and their teacher pose with books at Seminary Hills Elementary in Fort Worth, Texas.
Date:
December 6, 2004
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
The Rambler (Fort Worth, Tex.), Vol. 92, No. 6, Ed. 1 Wednesday, October 6, 2004
Weekly student newspaper from Texas Wesleyan University in Fort Worth, Texas that includes campus and local news along with advertising.
Date:
October 6, 2004
Creator:
Fowler, Whitney
Object Type:
Newspaper
System:
The Portal to Texas History
TDNA Monthly Office Manager's Report: December 2003
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 6, 2004
Creator:
Thompson, Darla
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: GA-0175
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; Consequences for a municipality if five of it's seven council members are removed at a recall election (RQ-0156-GA)
Date:
April 6, 2004
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Theoretical study of the electronic states of Nb4, Nb5 clusters and their anions (Nb4?, Nb5?)
Geometries and energy separations of the various low-lying electronic states of Nb{sub n} and Nb{sub n}{sup -} (n = 4, 5) clusters with various structural arrangements have been investigated. The complete active space multi-configuration self-consistent field (CASMCSCF) method followed by multi-reference singles and doubles configuration interaction (MRSDCI) calculations that included up to 52 million configuration spin functions have been used to compute several electronic states of these clusters. The ground states of both Nb{sub 4} ({sup 1}A', pyramidal) and Nb{sub 4}{sup -} ({sup 2}B{sub 3g}, rhombus) are low-spin states at the MRSDCI level. The ground state of Nb{sub 5} cluster is a doublet with a distorted trigonal bipyramid (DTB) structure. The anionic cluster of Nb{sub 5} has two competitive ground states with singlet and triplet multiplicities (DTB). The low-lying electronic states of these clusters have been found to be distorted due to Jahn-Teller effect. On the basis of the energy separations of our computed electronic states of Nb{sub 4} and Nb{sub 5}, we have assigned the observed photoelectron spectrum of Nb{sub n}{sup -}(n = 4, 5) clusters. We have also compared our MRSDCI results with density functional calculations. The electron affinity, ionization potential, dissociation and atomization energies of Nb{sub 4} …
Date:
May 6, 2004
Creator:
Balasubramanian, K & Majumdar, D
Object Type:
Article
System:
The UNT Digital Library
Mechanical Properties of K Basin Sludge Constituents and Their Surrogates
A survey of the technical literature was performed to summarize the mechanical properties of inorganic components in K Basins sludge. The components included gibbsite, ferrihydrite, lepidocrocite and goethite, hematite, quartz, anorthite, calcite, basalt, Zircaloy, aluminum, and, in particular, irradiated uranium metal and uranium dioxide. Review of the technical literature showed that information on the hardness of uranium metal at irradiation exposures similar to those experienced by the N Reactor fuel present in the K Basins (typically up to 3000 MWd/t) were not available. Measurements therefore were performed to determine the hardness of coupons taken from three irradiated N Reactor uranium metal fuel elements taken from K Basins. Hardness values averaged 30 {+-} 8 Rockwell C units, similar to values previously reported for uranium irradiated to {approx}1200 MWd/t. The physical properties of candidate uranium metal and uranium dioxide surrogates were gathered and compared. Surrogates having properties closest to those of irradiated uranium metal appear to be alloys of tungsten. The surrogate for uranium dioxide, present both as particles and agglomerates in actual K Basin sludge, likely requires two materials. Cerium oxide, CeO2, was identified as a surrogate of the smaller UO2 particles while steel grit was identified for the UO2 agglomerates.
Date:
December 6, 2004
Creator:
Delegard, Calvin H.; Schmidt, Andrew J. & Chenault, Jeffrey W.
Object Type:
Report
System:
The UNT Digital Library
Analyses in Support of Z-IFE: LLNL Progress Report for FY-04
During the last quarter of FY2004, Lawrence Livermore National Laboratory (LLNL) conducted a brief study of power plant options for a z-pinch-based inertial fusion energy (Z-IFE) power plant. Areas that were covered include chamber design, thick-liquid response, neutronics and activation, and systems studies. This report summarizes the progress made in each of these areas, provides recommendations for improvements to the basic design concept, and identifies future work that is needed. As a starting point to the LLNL studies, we have taken information provided in several publications and presentations. In particular, many of the basic parameters were taken from the ZP-3 study, which is described in reference 4. The ZP-3 design called for 12 separate target chambers, with any 10 of them operating at a given time. Each chamber would be pulsed at a repetition rate of 0.1 Hz with a target yield of 3 GJ. Thus, each chamber would have a fusion power of 300 MW for a power plant total of 3000 MW. The ZP-3 study considered several options for the recyclable transmission lines (RTL). Early in the study, the LLNL group questioned the use of many chambers as well as the yield limitation of 3 GJ. The feeling …
Date:
October 6, 2004
Creator:
Meier, W; Abbott, R; Latkowski, J; Moir, R; Reyes, S & Schmitt, R
Object Type:
Report
System:
The UNT Digital Library
A Sketch of Supreme Court Recognition of Fifth Amendment Protection for Acts of Production
This report discusses privilege under the Court Recognition of Fifth Amendment Protection for Acts of Production. The privilege covers an individual’s actions rather than his speech or writing, yet many incriminating actions such as providing a blood sample or a handwriting sample are ordinarily not protected because they are not testimonial.
Date:
January 6, 2004
Creator:
Doyle, Charles
Object Type:
Report
System:
The UNT Digital Library
Measurement of the polarization of the K-shell resonance line emission of S13+ and S14+ at relativistic electron beam energies.
We have measured the polarization of the heliumlike sulfur resonance line 1s2p {sup 1}P{sub 1} {yields} 1s{sup 2} {sup 1}S{sub 0}, and of the blend of the lithiumlike sulfur resonance lines 1s2s2p {sup 2}P{sub 3/2} {yields} 1s{sup 2}2s {sup 2}S{sub 1/2} and 1s2s2p {sup 2}P{sub 1/2} {yields} 1s{sup 2}2s {sup 2}S{sub 1/2} as a function of electron beam energy from near threshold to 144 keV. These lines were excited with the LLNL high-energy electron beam ion trap and measured using a newly modified two-crystal technique. Our results test polarization predictions in an energy regime where few empirical results have been reported. We also present calculations of the polarization using two different methods, and good agreement is obtained.
Date:
April 6, 2004
Creator:
Robbins, D; Faenov, A Y; Pikuz, T; Chen, H; Beiersdorfer, P; May, M et al.
Object Type:
Article
System:
The UNT Digital Library
The U.S.-Central America Free Trade Agreement (CAFTA): Challenges for Sub-Regional Integration
None
Date:
January 6, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The National Ignition Facility
The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory is a stadium-sized facility containing a 192-beam, 1.8-Megajoule, 500-Terawatt, ultraviolet laser system together with a 10-meter-diameter target chamber and room for 100 diagnostics. NIF is the world's largest and most energetic laser experimental system, providing a scientific center to study inertial confinement fusion and matter at extreme energy densities and pressures. NIF's energetic laser beams will compress fusion targets to conditions required for thermonuclear burn, liberating more energy than required to initiate the fusion reactions. Other NIF experiments will study physical processes at temperatures approaching 10{sup 8} K and 10{sup 11} bar; conditions that exist naturally only in the interior of stars and planets. NIF has completed the first phases of its laser commissioning program. The first four beams of NIF have generated 106 kilojoules in 23-ns pulses of infrared light and over 16 kJ in 3.5-ns pulses at the third harmonic (351 nm). NIF's target experimental systems are being commissioned and experiments have begun. This paper provides a detailed look the NIF laser systems, laser and optical performance, and results from recent laser commissioning shots. We follow this with a discussion of NIF's high-energy-density and inertial fusion experimental capabilities, …
Date:
February 6, 2004
Creator:
Miller, G H; Moses, E I & Wuest, C R
Object Type:
Article
System:
The UNT Digital Library
The Congressional Appropriations Process: An Introduction
Congress annually considers 13 or more appropriations measures, which provide funding for numerous activities, for example, national defense, education, homeland security, and crime. These measures also fund general government operations such as the administration of federal agencies. Congress has developed certain rules and practices for the consideration of appropriations measures, referred to as the congressional appropriations process. This report discusses the following aspects of this process: Annual appropriations cycle; Spending ceilings for appropriations associated with the annual budget resolution; and Prohibitions against certain language in appropriations measures that violate separation of the authorization and appropriation functions into separate measures.
Date:
December 6, 2004
Creator:
Streeter, Sandy
Object Type:
Report
System:
The UNT Digital Library
Full Wave Analysis of RF Signal Attenuation in a Lossy Cave using a High Order Time Domain Vector Finite Element Method
We present a computational study of signal propagation and attenuation of a 200 MHz dipole antenna in a cave environment. The cave is modeled as a straight and lossy random rough wall. To simulate a broad frequency band, the full wave Maxwell equations are solved directly in the time domain via a high order vector finite element discretization using the massively parallel CEM code EMSolve. The simulation is performed for a series of random meshes in order to generate statistical data for the propagation and attenuation properties of the cave environment. Results for the power spectral density and phase of the electric field vector components are presented and discussed.
Date:
December 6, 2004
Creator:
Pingenot, J; Rieben, R & White, D
Object Type:
Article
System:
The UNT Digital Library
Weighted Essentially Non-Oscillatory Simulations and Modeling of Complex Hydrodynamic Flows. Part 2. Single-Mode Richtmyer-Meshkov Instability with Reshock
The Richtmyer-Meshkov instability is a fundamental fluid instability that occurs when perturbations on an interface separating gases with different properties grow following the passage of a shock. This instability is typically studied in shock tube experiments, and constitutes a fundamental example of a complex hydrodynamic flow. Numerical simulations and models for the instability growth and evolution have also been used to further understand the physics of the Richtmyer-Meshkov instability. In the present work, the formally high-order accurate weighted essentially non-oscillatory (WENO) shock-capturing method using a third-order total-variation diminishing (TVD) Runge-Kutta time-evolution scheme (as implemented in the HOPE code [57]) is applied to simulate the single-mode Richtmyer-Meshkov instability with reshock in two spatial dimensions. The initial conditions and computational domain for the simulations are modeled after the Collins and Jacobs [23] single-mode, Mach 1.21 air(acetone)/SF6 shock tube experiment. The following boundary conditions are used: (1) periodic in the spanwise direction corresponding to the cross-section of the test section; (2) outflow at the entrance of the test section in the streamwise direction, and; (3) reflecting at the end wall of the test section in the streamwise direction. The present investigation has three principal motivations: (1) to provide additional validation of the HOPE …
Date:
October 6, 2004
Creator:
Schilling, O & Latini, M
Object Type:
Report
System:
The UNT Digital Library
Project BioShield
None
Date:
February 6, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Long-Term Care: Consumer-Directed Services Under Medicaid
None
Date:
February 6, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The DNA sequence and biology of human chromosome 19
Chromosome 19 has the highest gene density of all human chromosomes, more than double the genome-wide average. The large clustered gene families, corresponding high GC content, CpG islands and density of repetitive DNA indicate a chromosome rich in biological and evolutionary significance. Here we describe 55.8 million base pairs of highly accurate finished sequence representing 99.9% of the euchromatin portion of the chromosome. Manual curation of gene loci reveals 1,461 protein-coding genes and 321 pseudogenes. Among these are genes directly implicated in Mendelian disorders, including familial hypercholesterolemia and insulin-resistant diabetes. Nearly one quarter of these genes belong to tandemly arranged families, encompassing more than 25% of the chromosome. Comparative analyses show a fascinating picture of conservation and divergence, revealing large blocks of gene orthology with rodents, scattered regions with more recent gene family expansions and deletions, and segments of coding and non-coding conservation with the distant fish species Takifugu.
Date:
April 6, 2004
Creator:
Grimwood, J.; Gordon, L. A.; Olsen, A.; Terry, A.; Schmutz, J.; Lamerdin, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Dependent Care: Current Tax Benefits and Legislative Issues
This report provides information about the Current Tax Benefits and Legislative Issues on Dependent Care. The dependent care tax credit use the same definition of qualified employment related expenses.
Date:
January 6, 2004
Creator:
Scott, Christine
Object Type:
Report
System:
The UNT Digital Library
Comparison of Blade-Strike Modeling Results with Empirical Data
This study is the initial stage of further investigation into the dynamics of injury to fish during passage through a turbine runner. As part of the study, Pacific Northwest National Laboratory (PNNL) estimated the probability of blade strike, and associated injury, as a function of fish length and turbine operating geometry at two adjacent turbines in Powerhouse 1 of Bonneville Dam. Units 5 and 6 had identical intakes, stay vanes, wicket gates, and draft tubes, but Unit 6 had a new runner and curved discharge ring to minimize gaps between the runner hub and blades and between the blade tips and discharge ring. We used a mathematical model to predict blade strike associated with two Kaplan turbines and compared results with empirical data from biological tests conducted in 1999 and 2000. Blade-strike models take into consideration the geometry of the turbine blades and discharges as well as fish length, orientation, and distribution along the runner.
Date:
May 6, 2004
Creator:
Carlson, Thomas J. & Ploskey, Gene R.
Object Type:
Report
System:
The UNT Digital Library
Croatia: 2003 Elections and New Government
This report analyzes the elections and key issues facing the new government of Croatia in 2003.
Date:
January 6, 2004
Creator:
Kim, Julie
Object Type:
Report
System:
The UNT Digital Library
Nuclear Spin Statistics of extended aromatic C48N12 Azafullerene
We have presented the nuclear spin statistics of the novel extended aromatic C{sub 48}N{sub 12} azafullerene. The nuclear spin multiplets and statistical weights of {sup 14}N spin-1 bosons are provided. In addition we have also provided the {sup 13}C nuclear spin species and spin statistical weights of {sup 13}C{sub 48}N{sub 12}. The spin statistical weights and spin species show that the presence of {sup 14}N nuclei in the aromatic fullerene can provide unique experimental opportunity to investigate the nuclear spin species.
Date:
May 6, 2004
Creator:
Balasubramanian, K
Object Type:
Article
System:
The UNT Digital Library
Proceedings of Riken Bnl Research Center Workshop: Volume 56 Rbrc Scientific Review Committee Meeting.
The sixth evaluation of the RIKEN BNL Research Center (RBRC) took place on November 20-21, 2003, at Brookhaven National Laboratory. The present members of the Scientific Review Committee are Dr. Jean-Paul Blaizot, Professor Makoto Kobayashi, Dr. Akira Masaike, Professor Charles Young Prescott (absent), Professor Stephen Sharpe, and Professor Jack Sandweiss, Committee Chair. In order to illustrate the breadth and scope of the program, each member of the Center made a presentation on his research efforts. In addition, a special presentation was given jointly by our collaborators, Professors Norman Christ and Robert Mawhinney of Columbia University, on the progress and status of the IRBRC QCDSP/QCDOC Supercomputer program. A demonstration of a 64-node (64 Gflops peak speed) QCDOC machine in action followed. Although the main purpose of this review is a report to RIKEN Management (Dr. Ryoji Noyori, RIKEN President) on the health, scientific value, management and future prospects of the Center, the RBRC management felt that a compendium of the scientific presentations are of sufficient quality and interest that they warrant a wider distribution. Therefore we have made this compilation and present it to the community for its information and enlightenment.
Date:
January 6, 2004
Creator:
Samios, N. P. & Lee, T. D.
Object Type:
Report
System:
The UNT Digital Library
Carbon Nanotube-Based Permeable Membranes
A membrane of multiwalled carbon nanotubes embedded in a silicon nitride matrix was fabricated for use in studying fluid mechanics on the nanometer scale. Characterization by fluorescent tracer diffusion and scanning electron microscopy suggests that the membrane is void-free near the silicon substrate on which it rests, implying that the hollow core of the nanotube is the only conduction path for molecular transport. Assuming Knudsen diffusion through this nanotube membrane, a maximum helium transport rate (for a pressure drop of 1 atm) of 0.25 cc/sec is predicted. Helium flow measurements of a nanoporous silicon nitride membrane, fabricated by sacrificial removal of carbon, give a flow rate greater than 1x10{sup -6} cc/sec. For viscous, laminar flow conditions, water is estimated to flow across the nanotube membrane (under a 1 atm pressure drop) at up to 2.8x10{sup -5} cc/sec (1.7 {micro}L/min).
Date:
April 6, 2004
Creator:
Holt, J K; Park, H G; Bakajin, O; Noy, A; Huser, T & Eaglesham, D
Object Type:
Article
System:
The UNT Digital Library