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Archer County News (Archer City, Tex.), No. 10, Ed. 1 Thursday, March 6, 2003
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
March 6, 2003
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Hondo Anvil Herald (Hondo, Tex.), Vol. 117, No. 6, Ed. 1 Thursday, February 6, 2003
Weekly newspaper from Hondo, Texas that includes local, state, and national news along with extensive advertising.
Date:
February 6, 2003
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Kernel Principle Component Analysis of Microarray Data. Final Report
Given the limitations in the quantity and quality of gene expression array data, the focus of the research was shifted to development of statistical and computational tools for evaluation and detection of disease susceptibility mutations within a large set of individuals or even an entire population. The diseases that are of particular interest are those with complex etiology, involving interaction of multiple genes and/or environmental factors.
Date:
November 6, 2003
Creator:
Haghighi, F.
Object Type:
Report
System:
The UNT Digital Library
High-Angular-Momentum Structures in {sup 64}Zn
None
Date:
June 6, 2003
Creator:
Karlgren, D.; Clark, R. M.; Ragnarsson, I.; Svensson, C. E.; Ward, D.; Wyss, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Geometry optimization in quantum Monte Carlo with solution mapping: Application to formaldehyde
None
Date:
August 6, 2003
Creator:
Schuetz, C. A.; Frenklach, M.; Kollias, A. C. & Lester, W. A. Jr.
Object Type:
Article
System:
The UNT Digital Library
A design study for synchrotron-based high-numerical-aperture scanning illuminators
None
Date:
January 6, 2003
Creator:
Naulleau, Patrick P. & Denham, Paul E.
Object Type:
Article
System:
The UNT Digital Library
Ab initio study of low energy electron collisions with ethylene
None
Date:
October 6, 2003
Creator:
Trevisan, C. S.; Orel, A. E. & Rescigno, T. N.
Object Type:
Article
System:
The UNT Digital Library
LEPTON AND PHOTON PHYSICS AT RHIC.
Results on physics at RHIC using outgoing leptons and photons will be presented from Au+Au collisions at nucleon-nucleon c.m. energies {radical}(sNN) = 130 GeV and 200 GeV, and from p-p collisions at {radical}(sNN) = 200 GeV. Introduction and motivation will be presented both from the theoretical and experimental perspectives. Topics include open charm production via single e{sup {+-}}, J/{Psi} {yields} e{sup +} + e{sup -}, {mu}{sup +} + {mu}{sup -} and inclusive photon production.
Date:
January 6, 2003
Creator:
TANNENBAUM,M.J.
Object Type:
Article
System:
The UNT Digital Library
Wigglers and single-particle dynamics in the NLC damping rings
Wiggler insertions are expected to occupy a significant portion of the lattice of the Next Linear Collider (NLC) Main Damping Rings (MDR) and have a noticeable impact on the single-particle beam dynamics. Starting from a realistic 3D representation of the magnetic fields we calculate the transfer maps for the wigglers, accounting for linear and nonlinear effects, and we study the beam dynamics with particular attention paid to the Dynamic Aperture(DA). A DA reduction is observed but appears to remain within acceptable limits.
Date:
May 6, 2003
Creator:
Venturini, Marco; Wolski, Andrzej & Dragt, Alex
Object Type:
Article
System:
The UNT Digital Library
Scaling Cross Sections for Ion-atom Impact Ionization
The values of ion-atom ionization cross sections are frequently needed for many applications that utilize the propagation of fast ions through matter. When experimental data and theoretical calculations are not available, approximate formulas are frequently used. This paper briefly summarizes the most important theoretical results and approaches to cross section calculations in order to place the discussion in historical perspective and offer a concise introduction to the topic. Based on experimental data and theoretical predictions, a new fit for ionization cross sections is proposed. The range of validity and accuracy of several frequently used approximations (classical trajectory, the Born approximation, and so forth) are discussed using, as examples, the ionization cross sections of hydrogen and helium atoms by various fully stripped ions.
Date:
June 6, 2003
Creator:
Kaganovich, Igor D.; Startsev, Edward & Davidson, Ronald C.
Object Type:
Report
System:
The UNT Digital Library
Inverse Bremsstrahlung Stabilization of Noise in the Generation of Ultra-short Intense Pulses by Backward Raman Amplification
Inverse bremsstrahlung absorption of the pump laser beam in a backward Raman amplifier over the round-trip light transit time through the sub-critical density plasma can more than double the electron temperature of the plasma and produce time-varying axial temperature gradients. The resulting increased Landau damping of the plasma wave and detuning of the resonance can act to stabilize the pump against unwanted amplification of Langmuir noise without disrupting nonlinear amplification of the femtosecond seed pulse. Because the heating rate increases with the charge state Z, only low-Z plasmas (hydrogen, helium, or helium-hydrogen mixtures) will maintain a low enough temperature for efficient operation.
Date:
November 6, 2003
Creator:
Berger, Richard L.; Solodov, Daniel S. Clark Andrei; Valeo, Ernest J. & Fisch, Nathaniel J.
Object Type:
Report
System:
The UNT Digital Library
Radiation and Shielding Data for Pu-Al Components
Radiation intensities associated with the various Pu-Al fuel and target components considered to date for a Cm244 production program vary according to quantity and isotopic content of the Pu used, age of the Pu since separation, and component design. This report summarizes the results of calculations made to determine expected radiation intensities and includes associated shielding data for use in evaluating future shielding requirements for billet preparation and tube extrusion facilities.
Date:
January 6, 2003
Creator:
Vernon, P. B.
Object Type:
Report
System:
The UNT Digital Library
Lagrangian Formulation of Relativistic Particle Average Motion in a Laser Field of Arbitrary Intensity
The Lagrangian and Hamiltonian functions describing average motion of a relativistic particle under the action of intensive high-frequency electromagnetic radiation are obtained. In weak, low-frequency background fields, such a particle on average drifts with an effective, relativistically invariant mass, which depends on the intensity of the electromagnetic field.
Date:
February 6, 2003
Creator:
Dodin, I. Y.; Fisch, N. J. & Fraiman, G. M.
Object Type:
Report
System:
The UNT Digital Library
Reactivity of Peroxynitrite: Implications for Hanford Waste Management and Remediation
The purpose of this grant has been to provide basic chemical research in support of a major project undertaken at Brookhaven National Laboratory (BNL) whose purpose was to provide better understanding of the complex chemical processes occurring an nuclear storage tanks on the Hanford reservation. More specifically, the BNL grant was directed at evaluating the extend of radiation-induced formation of peroxynitrite anion (ONOO) in the tanks and its possible use in was incorporated as a subcontract EMSP 73824, but was later changed to an independent grant to avoid unnecessary duplication of administrative support at both WSU and BNL.
Date:
November 6, 2003
Creator:
Hurst, James K.
Object Type:
Report
System:
The UNT Digital Library
Palomar 5 and its tidal tails: New observational results
Sloan Digital Sky Survey data for the field of the cluster Pal 5 reveal the existence of a long massive stream of tidal debris spanning an arc of 10{sup o} on the sky. Pal 5 thus provides an outstanding example for tidal disruption of globular clusters in the Milky Way. Radial velocities from VLT spectra show that Pal 5 has an extremely low velocity dispersion, in accordance with the very low mass derived from its total luminosity.
Date:
February 6, 2003
Creator:
al., M. Odenkirchen et
Object Type:
Article
System:
The UNT Digital Library
Isolation of Metals from Liquid Wastes: Reactive Scavenging in Turbulent Thermal Reactors
The Overall project demonstrated that toxic metals (cesium Cs and strontium Sr) in aqueous and organic wastes can be isolated from the environment through reaction with kaolinite based sorbent substrates in high temperature reactor environments. In addition, a state-of-the art laser diagnostic tool to measure droplet characteristic in practical 'dirty' laboratory environments was developed, and was featured on the cover of a recent edition of the scientific journal ''applied Spectroscopy''. Furthermore, great strides have been made in developing a theoretical model that has the potential to allow prediction of the position and life history of every particle of waste in a high temperature, turbulent flow field, a very challenging problem involving as it does, the fundamentals of two phase turbulence and of particle drag physics.
Date:
August 6, 2003
Creator:
Wendt, Jost O. L.; Kerstein, Alan R.; Scheeline, Alexander; Pearlstein, Arne & Linak, William
Object Type:
Report
System:
The UNT Digital Library
Survey of Packaging Requirements for the Transport of Highly Hazardous Materials
Among hazardous materials those which are most dangerous fall into three categories: chemical, biological, and radioactive. The DOT hazard classes for these three categories are Hazard Class 2.3 (poisonous gases) and 6.1 (toxic substances) for chemical hazards, Hazard Class 6.2 (infectious substances) for biological hazards and Hazard Class 7 for radioactive material (RAM) hazards. The packaging requirements for chemical and biological hazards are outlined and compared with RAM packaging requirements. RAM packages are found to be able to withstand much more severe performance tests than packages for other, more lethal hazards.
Date:
May 6, 2003
Creator:
Smith, A. C.
Object Type:
Article
System:
The UNT Digital Library
Disorder and Self-Organization on Surfaces
None
Date:
February 6, 2003
Creator:
Sander, Leonard M.
Object Type:
Report
System:
The UNT Digital Library
Basin Analysis of the Mississippi Interior Salt Basin and Petroleum System Modeling of the Jurassic Smackover Formation, Eastern Gulf Coastal Plain
The project objectives are improving access to information for the Mississippi Interior Salt Basin by inventorying data files and records of the major information repositories in the region, making these inventories easily accessible in electronic format, increasing the amount of information available on domestic sedimentary basins through a comprehensive analysis of the Mississippi Interior Salt Basin, and enhancing the understanding of the petroleum systems operating in the Mississippi Interior Salt Basin.
Date:
February 6, 2003
Creator:
Mancini, Ernest A.
Object Type:
Report
System:
The UNT Digital Library
Confinement Studies of Auxiliary Heated NSTX Plasmas
The confinement of auxiliary heated NSTX discharges is discussed. The energy confinement time in plasmas with either L-mode or H-mode edges is enhanced over the values given by the ITER97L and ITER98Pby(2) scalings, being up to 2-3 times L-mode and 1.5 times H-mode. TRANSP calculations based on the kinetic profile measurements reproduce the magnetics-based determination of stored energy and the measured neutron production rate. Power balance calculations reveal that, in a high power neutral beam heated H-mode discharge, the ion thermal transport is near neoclassical levels, and well below the electron thermal transport, which is the main loss channel. Perturbative impurity injection techniques indicate the particle diffusivity to be slightly above the neoclassical level in discharges with L-mode edge. High-harmonic fast-wave (HHFW) bulk electron heating is described and thermal transport is discussed. Thermal ion transport is found to be above neoclassical level, but thermal electron transport remains the main loss mechanism. Evidences of an electron thermal internal transport barrier obtained with HHFW heating are presented. A description of H-mode discharges obtained during HHFW heating is presented.
Date:
May 6, 2003
Creator:
LeBlanc, B. P.; Bell, M. G.; Bell, R. E.; Bitter, M. L.; Bourdelle, C.; Gates, D. A. et al.
Object Type:
Report
System:
The UNT Digital Library
Supporting evaluation for the proposed plan for final remedial action for the groundwater operable unit at the chemical plant area of the Weldon Spring Site, Weldon Spring, Missouri.
This report presents the technical information developed since the interim record of decision (IROD) was issued in September 2000 (U.S. Department of Energy [DOE] 2000). The information was incorporated into the evaluation that was performed in selecting the preferred alternative for the Chemical Plant groundwater operable unit (GWOU) of the Weldon Spring site. The contaminants of concern (COCs) in groundwater and springs are trichloroethylene (TCE), nitrate, uranium, and nitroaromatic compounds. The preferred alternative of monitored natural attenuation (MNA) coupled with institutional controls (ICs) and contingency activities is described in the ''Proposed Plan (PP) for Final Remedial Action for the Groundwater Operable Unit at the Chemical Plant Area of the Weldon Spring Site, Weldon Spring, Missouri'' (DOE 2003b).
Date:
August 6, 2003
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Temperature Effect on the Sorption of Radionuclides by Freshwater Algae
The heavy waters of the reactor effluent streams within the Savannah River Plant area transport very low concentrations of fission and activation products through miles of natural streambeds and swamps to the Savannah River. This study emphasizes the effects of environmental factors on the sorption of radionuclides by representative species.
Date:
January 6, 2003
Creator:
Harvey, R. S.
Object Type:
Article
System:
The UNT Digital Library
Removable Thin Films used for the Abatement and Mitigation of Beryllium
The use of removable thin films for the abatement of hazardous particulates has many advantages. Removable thin films are designed to trap and fix particulates in the film's matrix by adhesion. Thin films can be applied to an existing contaminated area to fix and capture the particulates for removal. The nature of the removable thin films, after sufficient cure time, is such that it can typically be removed as one continuous entity. The removable thin films can be applied to almost any surface type with a high success rate of removal.
Date:
November 6, 2003
Creator:
Lumia, M.; Gentile, C.; Creek, K. & Sandoval, R.
Object Type:
Report
System:
The UNT Digital Library
A new security model for collaborative environments
Prevalent authentication and authorization models for distributed systems provide for the protection of computer systems and resources from unauthorized use. The rules and policies that drive the access decisions in such systems are typically configured up front and require trust establishment before the systems can be used. This approach does not work well for computer software that moderates human-to-human interaction. This work proposes a new model for trust establishment and management in computer systems supporting collaborative work. The model supports the dynamic addition of new users to a collaboration with very little initial trust placed into their identity and supports the incremental building of trust relationships through endorsements from established collaborators. It also recognizes the strength of a users authentication when making trust decisions. By mimicking the way humans build trust naturally the model can support a wide variety of usage scenarios. Its particular strength lies in the support for ad-hoc and dynamic collaborations and the ubiquitous access to a Computer Supported Collaboration Workspace (CSCW) system from locations with varying levels of trust and security.
Date:
June 6, 2003
Creator:
Agarwal, Deborah; Lorch, Markus; Thompson, Mary & Perry, Marcia
Object Type:
Article
System:
The UNT Digital Library