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Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 67, Ed. 1 Wednesday, June 2, 2004
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 2, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 58, Ed. 1 Sunday, May 2, 2004
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 2, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Diboson production cross-sections at square root s = 1.96 TeV
Recent results of W{gamma}, Z{gamma} and WW cross-section measurements in the electron and muon channels are reported from p{bar p} collisions at {radical}s = 1.96 TeV recorded by the CDF and D0 collaborations. Total cross-sections and kinematic distributions are found to be consistent with Standard Model expectations.
Date:
August 2, 2004
Creator:
Robson, A.
Object Type:
Article
System:
The UNT Digital Library
Modeling of Diffusion of Plutonium in Other Metals and of Gaseous Species in Plutonium-Based Systems
Establish standards for temperature conditions under which plutonium, uranium, or neptunium from nuclear wastes permeates steel, with which it is in contact, by diffusion processes. The primary focus is on plutonium because of the greater difficulties created by the peculiarities of face-centered-cubic-stabilized (delta) plutonium (the form used in the technology generating the waste).
Date:
July 2, 2004
Creator:
Cooper, Bernard R.; Fernando, Gayanath W.; Beiden, S.; Setty, A. & Sevilla, E.H.
Object Type:
Report
System:
The UNT Digital Library
Seepage Calibration Model and Seepage Testing Data
The purpose of this Model Report is to document the Seepage Calibration Model (SCM). The SCM was developed (1) to establish the conceptual basis for the Seepage Model for Performance Assessment (SMPA), and (2) to derive seepage-relevant, model-related parameters and their distributions for use in the SMPA and seepage abstraction in support of the Total System Performance Assessment for License Application (TSPA-LA). This Model Report has been revised in response to a comprehensive, regulatory-focused evaluation performed by the Regulatory Integration Team [''Technical Work Plan for: Regulatory Integration Evaluation of Analysis and Model Reports Supporting the TSPA-LA'' (BSC 2004 [DIRS 169653])]. The SCM is intended to be used only within this Model Report for the estimation of seepage-relevant parameters through calibration of the model against seepage-rate data from liquid-release tests performed in several niches along the Exploratory Studies Facility (ESF) Main Drift and in the Cross-Drift. The SCM does not predict seepage into waste emplacement drifts under thermal or ambient conditions. Seepage predictions for waste emplacement drifts under ambient conditions will be performed with the SMPA [''Seepage Model for PA Including Drift Collapse'' (BSC 2004 [DIRS 167652])], which inherits the conceptual basis and model-related parameters from the SCM. Seepage during the …
Date:
September 2, 2004
Creator:
Finsterle, S.
Object Type:
Report
System:
The UNT Digital Library
Continuation of Full-Scale Three-Dimensional Numerical Experiments on High-Intensity Particle and Laser Beam-Matter Interactions
To continue and extend our ''Full-scale three-dimensional numerical experiments on high-intensity particle and laser beam-matter interactions''.
Date:
June 2, 2004
Creator:
Mori, W. B.
Object Type:
Report
System:
The UNT Digital Library
Cascade Line Testing for Hanford Single-Shell HLW Tank Closure
Two proof-of-principle large-scale tests were performed to simulate the flow of grout into Hanford single-shell HLW Tanks and into cascade lines which interconnect the HLW tanks. The goal of the testing was to determine whether the HLW tank grout can enter the cascade line and solidify prior to flowing into an adjacent tank. Two tests were performed as part of this task. The tests were conducted using the Phase 2 Structural Grout, SRG2, the structural grout mix that was used during scale-up testing last year.
Date:
December 2, 2004
Creator:
JOHN, HARBOUR
Object Type:
Report
System:
The UNT Digital Library
Transport From Overlapping Electron and Ion Driftwave Instabilities
The electron temperature gradient (ETG) mode is a likely contributor to electron thermal transport in tokamaks. The ETG modes are dominantly unstable for poloidal wavelengths shorter than the ion gyroradius (high-k) where the ion response is adiabatic. Thus, they do not directly produce ion thermal or momentum transport or particle transport. Two potential mechanisms whereby ETG modes could produce transport in these channels are explored in this paper: a nonlinear coupling between high-k ETG modes and ions at low-k and a direct coupling when ETG modes and ion temperature gradient (ITG) modes are unstable in overlapping wavenumber ranges. It will be shown that the particle and momentum transport required to match experiment is small compared to the ETG driven electron thermal transport. Even quasilinearly ETG modes can produce ion transport if the ITG and ETG modes are both unstable at low-k. The implications of this for transport will be explored at the quasilinear level. A new gyro-Landau-fluid (GLF) closure model has been constructed in order to build a transport model which can include the coupling between electron and ion modes including trapped particles. The first growth rate spectra from this model will be shown to give an accurate approximation to …
Date:
July 2, 2004
Creator:
Staebler, G. M.; Kinsey, J. E. & Waltz, R. E.
Object Type:
Article
System:
The UNT Digital Library
Characterization of Supernate Samples from HLW Tanks 13H, 30H, 37H, 39H, 45F, 46F, and 49H
This document presents work conducted in support of technical needs expressed, in part, by the Engineering, Procurement, and Construction Contractor for the Salt Waste Processing Facility (SWPF). The Department of Energy (DOE) requested that Savannah River National Laboratory (SRNL) analyze and characterize supernate waste from seven selected High Level Waste (HLW) tanks to allow classification of feed to be sent to the SWPF, verification that SWPF processes will be able to meet Saltstone Waste Acceptance Criteria (WAC), and updating of the Waste Characterization System (WCS) database. This document provides characterization data of samples obtained from Tanks 13H, 30H, 37H, 39H, 45F, 46F, and 49H and discusses results.Characterization of the waste tank samples involved several treatments and analysis at various stages of sample processing. These analytical stages included as-received liquid, post-dilution to 6.44 M sodium (target), post-acid digestion, post-filtration (at 3 filtration pore sizes), and after cesium removal using ammonium molybdophosphate (AMP). Results and observations obtained from testing include the following. All tanks will require cesium removal as well as treatment with Monosodium Titanate (MST) for 90Sr (Strontium) decontamination. A small filtration effect for 90Sr was observed for five of the seven tank wastes. No filtration effects were observed for Pu …
Date:
July 2, 2004
Creator:
STALLINGS, MARY
Object Type:
Report
System:
The UNT Digital Library
Discussion of 'Tectonic Controls of Mississippi Valley-type Lead-Zinc Mineralization in Orogenic Forelands'
None
Date:
January 2, 2004
Creator:
Kesler, Stephen E.; Chesley, John T.; Christensen, John N.; Hagni, Richard D.; Heijlen, Wouter; Kyle, J. Richard et al.
Object Type:
Article
System:
The UNT Digital Library
Even parity theta-pentaquark and stable strange nuclear matter
The newly discovered exotic {Theta} baryon of mass 1540 MeV (and very small width) truly has a very low mass, if it is a pentaquark system of even parity. A schematic model in which the coherent interaction of u{bar s} and d{bar s} pairs leads to a very large residual (non-confining) attractive interaction is introduced. This collective vibrational model accounts for the mass and small decay width to the KN channel, but yields a significant coupling to the virtual K*N channel. The schematic model predicts an attractive {Theta}-nucleon interaction strong enough to bind a {Theta} particle to a nucleus in a state that is stable against decay via strong interactions. The discovery of {Theta}-nuclei could be a definitive proof that the {Theta} parity is even.
Date:
March 2, 2004
Creator:
Miller, Gerald A.
Object Type:
Article
System:
The UNT Digital Library
Performance of Underfloor Air Distribution: Results of a Field Study
Underfloor air distribution (UFAD) is a new method of supplying heated or cooled air throughout a building. Reported advantages of UFAD include easy relocation of air supply diffusers, energy savings, and improved indoor air quality (IAQ). We measured several aspects of the performance of an UFAD system installed in a medium-size office building. The measured air change effectiveness was very close to unity, which is comparable to that measured in buildings with typical overhead air distribution. The pollutant removal efficiency for carbon dioxide was 13 percent higher than expected in a space with well-mixed air, suggesting a 13 percent reduction in exposures to occupant generated pollutants. The increase in indoor air temperatures with height above the floor was only 1 to 2 C (2-4 F). This amount of thermal stratification could reduce the sensible energy requirements for cooling of outdoor air by approximately 10 percent. The occupants level of satisfaction with thermal conditions w as well above average and this high satisfaction rating could possibly be due, in all or part, to the use of a UFAD system. The results of this study provide some evidence of moderate energy and IAQ-related benefits of UFAD. Before general conclusions are drawn, the …
Date:
September 2, 2004
Creator:
Fisk, William; Faulkner, David & Sullivan, Douglas
Object Type:
Report
System:
The UNT Digital Library
New Correction Procedure for X-Ray Spectroscopic Fluorescence Data: Simulations and Experiment.
X-ray fluorescence spectroscopy is a widely used method for determining the electronic configuration and local structure of dilute species with high sensitivity. In the dilute limit, and for thin films, the X-ray fluorescence signal is directly proportional to the atomic sub-shell absorption coefficient. However, for concentrated samples, the well-documented self-absorption effect often leads to the severe suppression of XANES (X-ray Absorption Near-Edge Structure) and EXAFS (Extended X-ray Absorption Fine-Structure) amplitudes. Thus to recover the real value of the sub-shell absorption coefficient, it is important to apply correction procedures to the measured fluorescence spectra. In this paper, we describe a new straightforward method to correct for self-absorption effects (the difference in the measured fluorescence signal compared to that of the true sub-shell photoabsorption coefficient) in XANES and EXAFS fluorescence measurements. Using a variety of sample and detector configurations, this method is used to extract the sub-shell absorption coefficient on elemental nickel and thick single-crystals of Gd{sub 3}Ga{sub 5}O{sub 12} and LaAlO{sub 3}.
Date:
August 2, 2004
Creator:
Ablett, J. M.; Woicik, J. C. & Kao, C. C.
Object Type:
Article
System:
The UNT Digital Library
Strong-strong beam-beam simulation on parallel computer
The beam-beam interaction puts a strong limit on the luminosity of the high energy storage ring colliders. At the interaction points, the electromagnetic fields generated by one beam focus or defocus the opposite beam. This can cause beam blowup and a reduction of luminosity. An accurate simulation of the beam-beam interaction is needed to help optimize the luminosity in high energy colliders.
Date:
August 2, 2004
Creator:
Qiang, Ji
Object Type:
Article
System:
The UNT Digital Library
Pump Side-scattering in Ultra-powerful Backward Raman Amplifiers
Extremely large laser power might be obtained by compressing laser pulses through backward Raman amplification (BRA) in plasmas. Premature Raman backscattering of a laser pump by plasma noise might be suppressed by an appropriate detuning of the Raman resonance, even as the desired amplification of the seed persists with a high efficiency. In this paper, we analyze side-scattering of laser pumps by plasma noise in backward Raman amplifiers. Though its growth rate is smaller than that of backscattering, the side-scattering can nevertheless be dangerous, because of a longer path of side-scattered pulses in plasmas and because of an angular dependence of the Raman resonance detuning. We show that side-scattering of laser pumps by plasma noise in BRA might be suppressed to a tolerable level at all angles by an appropriate combination of two detuning mechanisms associated with plasma density gradient and pump chirp.
Date:
March 2, 2004
Creator:
A.A. Solodov, V.M. Malkin, and N.J. Fisch
Object Type:
Report
System:
The UNT Digital Library
Scaled Opposite Spin Second Order Moller-Plesset Correlation Energy: An Economical Electronic Structure Method
A simplified approach to treating the electron correlation energy is suggested in which only the alpha-beta component of the second order Moller-Plesset energy is evaluated, and then scaled by an empirical factor which is suggested to be 1.3. This scaled opposite spin second order energy (SOS-MP2) yields results for relative energies and derivative properties that are statistically improved over the conventional MP2 method. Furthermore, the SOS-MP2 energy can be evaluated without the 5th order computational steps associated with MP2 theory, even without exploiting any spatial locality. A 4th order algorithm is given for evaluating the opposite spin MP2 energy using auxiliary basis expansions, and a Laplace approach, and timing comparisons are given.
Date:
August 2, 2004
Creator:
Jung, Yousung; Lochan, Rohini C.; Dutoi, Anthony D. & Head-Gordon, Martin
Object Type:
Article
System:
The UNT Digital Library
Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic From Coal-Based Power Plants in the Ohio River Valley Region Progress Report
Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal …
Date:
October 2, 2004
Creator:
Crist, Kevin
Object Type:
Report
System:
The UNT Digital Library
Energy efficiency standards for residential and commercial equipment: Additional opportunities
Energy efficiency standards set minimum levels of energy efficiency that must be met by new products. Depending on the dynamics of the market and the level of the standard, the effect on the market for a given product may be small, moderate, or large. Energy efficiency standards address a number of market failures that exist in the buildings sector. Decisions about efficiency levels often are made by people who will not be responsible for the energy bill, such as landlords or developers of commercial buildings. Many buildings are occupied for their entire lives by very temporary owners or renters, each unwilling to make long-term investments that would mostly reward subsequent users. And sometimes what looks like apathy about efficiency merely reflects inadequate information or time invested to evaluate it. In addition to these sector-specific market failures, energy efficiency standards address the endemic failure of energy prices to incorporate externalities. In the U.S., energy efficiency standards for consumer products were first implemented in California in 1977. National standards became effective starting in 1988. By the end of 2001, national standards were in effect for over a dozen residential appliances, as well as for a number of commercial sector products. Updated standards …
Date:
August 2, 2004
Creator:
Rosenquist, Greg; McNeil, Michael; Iyer, Maithili; Meyers, Steve & McMahon, Jim
Object Type:
Report
System:
The UNT Digital Library
Angle-Resolved 2D Imaging of Electron Emission Processes in Atoms and Molecules
A variety of electron emission processes have been studied in detail for both atomic and molecular systems, using a highly efficient experimental system comprising two time-of-flight (TOF) rotatable electron energy analyzers and a 3rd generation synchrotron light source. Two examples are used here to illustrate the obtained results. Firstly, electron emissions in the HCL molecule have been mapped over a 14 eV wide photon energy range over the Cl 2p ionization threshold. Particular attention is paid to the dissociative core-excited states, for which the Auger electron emission shows photon energy dependent features. Also, the evolution of resonant Auger to the normal Auger decay distorted by post-collision interaction has been observed and the resonating behavior of the valence photoelectron lines studied. Secondly, an atomic system, neon, in which excitation of doubly excited states and their subsequent decay to various accessible ionic states has been studied. Since these processes only occurs via inter-electron correlations, the many body dynamics of an atom can be probed, revealing relativistic effects, surprising in such a light atom. Angular distribution of the decay of the resonances to the parity unfavored continuum exhibits significant deviation from the LS coupling predictions.
Date:
September 2, 2004
Creator:
Kukk, E.; Wills, A. A.; Langer, B.; Bozek, J. D. & Berrah, N.
Object Type:
Article
System:
The UNT Digital Library
National facility for advanced computational science: A sustainable path to scientific discovery
Lawrence Berkeley National Laboratory (Berkeley Lab) proposes to create a National Facility for Advanced Computational Science (NFACS) and to establish a new partnership between the American computer industry and a national consortium of laboratories, universities, and computing facilities. NFACS will provide leadership-class scientific computing capability to scientists and engineers nationwide, independent of their institutional affiliation or source of funding. This partnership will bring into existence a new class of computational capability in the United States that is optimal for science and will create a sustainable path towards petaflops performance.
Date:
April 2, 2004
Creator:
Simon, Horst; Kramer, William; Saphir, William; Shalf, John; Bailey, David; Oliker, Leonid et al.
Object Type:
Report
System:
The UNT Digital Library
Materials Research Collaborative Access Team Final Report - DOE Grant No.DEFG0200ER45811
Operations Funding for the Materials Research Collaborative Access Team. In the proposal they presented five specific objectives for the MR-CAT Insertion Device beam line: (1) enable the accomplishment of the best possible science at MR-CAT; (2) facilitate efficient set-up and operations of a variety of complex materials-related experiments; (3) open the beamlines' facilities to scientists and science projects from non-traditional backgrounds and disciplines, respectively; (4) enable efficient 24 hour use of the beamline through interdisciplinary research teams and appropriate operations support; and (5) develop selected operations modes in support of the MR-CAT institutions, DOE collaborators, and general users.
Date:
May 2, 2004
Creator:
Segre, Carlo
Object Type:
Report
System:
The UNT Digital Library
Study of the beam-beam limit in e{sup +}e{sup -} circular colliders
Beam-beam effects limit the luminosity of circular colliders. Once the bunch population exceeds a threshold, the luminosity increases at a slower rate. This phenomenon is called the beam-beam limit. Onset of the beam-beam limit has been analyzed with various simulation methods based on the weak-strong and strong-strong models. We have observed that an incoherent phenomenon is mainly concerned in the beam-beam limit. The simulation have shown that equilibrium distributions of the two colliding beams are distorted from Gaussians when the luminosity is limited. The beam-beam limit is estimated to be (xi) {approx} 0.1 for a B factory with damping time of several thousand turns.
Date:
April 2, 2004
Creator:
Ohmi, K.; Tawada, M.; Cai, Y.; Kamada, S.; Oide, K. & Qiang, J.
Object Type:
Article
System:
The UNT Digital Library
PKI-based security for peer-to-peer information sharing
The free flow of information is the feature that has made peer-to-peer information sharing applications popular. However, this very feature holds back the acceptance of these applications by the corporate and scientific communities. In these communities it is important to provide confidentiality and integrity of communication and to enforce access control to shared resources. We present a number of security mechanisms that can be used to satisfy these security requirements. Our solutions are based on established and proven security techniques and we utilize existing technologies when possible. As a proof of concept, we have developed an information sharing system, called scishare, which integrates a number of these security mechanisms to provide a secure environment for information sharing. This system will allow a broader set of user communities to benefit from peer-to-peer information sharing.
Date:
May 2, 2004
Creator:
Berket, Karlo; Essiari, Abdelilah & Muratas, Artur
Object Type:
Article
System:
The UNT Digital Library
Exploring little Higgs models with ATLAS at the LHC
We discuss possible searches for the new particles predicted by Little Higgs Models at the LHC. By using a simulation of the ATLAS detector, we demonstrate how the predicted quark, gauge bosons and additional Higgs bosons can be found and estimate the mass range over which their properties can be constrained.
Date:
February 2, 2004
Creator:
Azuelos, G.; Benslama, K.; Costanzo, D.; Couture, G.; Garcia, J.E.; Hinchliffe, I.G. et al.
Object Type:
Article
System:
The UNT Digital Library