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DGS Newsletter, Volume 28, Number 10, November/December 2004
Newsletter of the Dallas Genealogical Society discussing membership, Society meetings, genealogical workshops and events, and other news of interest to members.
Date:
November 2004
Creator:
Dallas Genealogical Society
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Dimensional deconstruction and Wess-Zumino-Witten terms
A new technique is developed for the derivation of the Wess-Zumino-Witten terms of gauged chiral lagrangians. We start in D = 5 with a pure (mesonless) Yang-Mills theory, which includes relevant gauge field Chern-Simons terms. The theory is then compactified, and the effective D = 4 lagrangian is derived using lattice techniques, or ''deconstruction'', where pseudoscalar mesons arise from the lattice Wilson links. This yields the WZW term with the correct Witten coefficient by way of a simple heuristic argument. We discover a novel WZW term for singlet currents, that yields the full Goldstone-Wilczek current, and a U(1) axial current for the skyrmion, with the appropriate anomaly structures. A more detailed analysis is presented of the dimensional compactification of Yang-Mills in D = 5 into a gauged chiral lagrangian in D = 4, heeding the consistency of the D = 4 and D = 5 Bianchi identities. These dictate a novel covariant derivative structure in the D = 4 gauge theory, yielding a field strength modified by the addition of commutators of chiral currents. The Chern-Simons term of the pure D = 5 Yang-Mills theory then devolves into the correct form of the Wess-Zumino-Witten term with an index (the analogue …
Date:
November 1, 2004
Creator:
Hill, Christopher T.; /Fermilab; Zachos, Cosmas K. & /Argonne
Object Type:
Article
System:
The UNT Digital Library
Direct FuelCell/Turbine Power Plant Annual Technical Progress Report: 2003
This report includes the progress in development of Direct FuelCell/Turbine{reg_sign} (DFC/T{reg_sign}) power plants for generation of clean power at very high efficiencies. The DFC/T power system is based on an indirectly heated gas turbine to supplement fuel cell generated power. The DFC/T power generation concept extends the high efficiency of the fuel cell by utilizing the fuel cell's byproduct heat in a Brayton cycle. Features of the DFC/T system include: electrical efficiencies of up to 75% on natural gas, 60% on coal gas, minimal emissions, simplicity in design, direct reforming internal to the fuel cell, reduced carbon dioxide release to the environment, and potential cost competitiveness with existing combined cycle power plants. The operation of sub-MW hybrid Direct FuelCell/Turbine power plant test facility with a Capstone C60 microturbine was initiated in March 2003. The inclusion of the C60 microturbine extended the range of operation of the hybrid power plant to higher current densities (higher power) than achieved in previous tests using a 30kW microturbine. The design of multi-MW DFC/T hybrid systems, approaching 75% efficiency on natural gas, was initiated. A new concept was developed based on clusters of One-MW fuel cell modules as the building blocks. System analyses were performed, …
Date:
November 1, 2004
Creator:
Ghezel-Ayagh, Hossein
Object Type:
Report
System:
The UNT Digital Library
Direct Searches for Scalar Leptoquarks at the Run II Tevatron
This dissertation sets new limits on the mass of the scalar leptoquark from direct searches carried out at the Run II CDF detector using data from March 2001 to October 2003. The data analyzed has a total time-integrated measured luminosity of 198 pb{sup -1} of p{bar p} collisions with {radical}s = 1.96 TeV. Leptoquarks are assumed to be pair-produced and to decay into a lepton and a quark of the same generation. They consider two possible leptoquark decays: (1) {beta} = BR(LQ {yields} {mu}q) = 1.0, and (2) {beta} = BR(LQ {yields} {mu}q) = 0.5. For the {beta} = 1 channel, they focus on the signature represented by two isolated high-p{sub T} muons and two isolated high-p{sub T} jets. For the {beta} = 1/2 channel, they focus on the signature represented by one isolated high-p{sub T} muon, large missing transverse energy, and two isolated high-p{sub T} jets. No leptoquark signal is experimentally detected for either signature. Using the next to leading order theoretical cross section for scalar leptoquark production in p{bar p} collisions [1], they set new mass limits on second generation scalar leptoquarks. They exclude the existence of second generation scalar leptoquarks with masses below 221(175) GeV/c{sup 2} for …
Date:
November 1, 2004
Creator:
Ryan, Daniel E. & U., /Tufts
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Discovery of Two Gravitationally Lensed Quasars with Image Separations of 3 Arcseconds from the Sloan Digital Sky Survey
We report the discovery of two doubly-imaged quasars, SDSS J100128.61+502756.9 and SDSS J120629.65+433217.6, at redshifts of 1.838 and 1.789 and with image separations of 2.86'' and 2.90'', respectively. The objects were selected as lens candidates from the Sloan Digital Sky Survey (SDSS). Based on the identical nature of the spectra of the two quasars in each pair and the identification of the lens galaxies, we conclude that the objects are gravitational lenses. The lenses are complicated; in both systems there are several galaxies in the fields very close to the quasars, in addition to the lens galaxies themselves. The lens modeling implies that these nearby galaxies contribute significantly to the lens potentials. On larger scales, we have detected an enhancement in the galaxy density near SDSS J100128.61+502756.9. The number of lenses with image separation of {approx} 3'' in the SDSS already exceeds the prediction of simple theoretical models based on the standard Lambda-dominated cosmology and observed velocity function of galaxies.
Date:
November 1, 2004
Creator:
Oguri, Masamune; Inada, Naohisa; Hennawi, Joseph F.; Richards, Gordon T.; Johnston, David E.; Frieman, Joshua A. et al.
Object Type:
Article
System:
The UNT Digital Library
A dynamically reconfigurable data stream processing system
This paper describes a component-based framework for data stream processing that allows for configuration, tailoring, and runtime system reconfiguration. The system's architecture is based on a pipes and filters pattern, where data is passed through routes between components. A network of pipes and filters can be dynamically reconfigured in response to a preplanned sequence of processing steps, operator intervention, or a change in one or more data streams. This framework provides several mechanisms supporting dynamic reconfiguration and can be used to build static data stream processing applications such as monitoring or data acquisition systems, as well as self-adjusting systems that can adapt their processing algorithm, presentation layer, or data persistency layer in response to changes in input data streams.
Date:
November 1, 2004
Creator:
Nogiec, J. M. & Trombly-Freytag, K.
Object Type:
Article
System:
The UNT Digital Library
[Eagle on a branch]
Photograph of a bald eagle resting on a branch inside of the Caldwell Zoo, located in Tyler, Texas.
Date:
November 2004
Creator:
Mallory, Randy
Object Type:
Photograph
System:
The UNT Digital Library
Early LLNL Application Scaling Results on BlueGene/L
Miranda is a high order hydrodynamics code for computing fluid instabilities and turbulent mixing. It employs FFTs and band-diagonal matrix solvers for computing spectrally-accurate derivatives, combined with high-order integration methods for time advancement; e.g., fourth-order Runge-Kutta. Fluid properties, i.e., viscosity, diffusivity and thermal conductivity, are computed from kinetic theory. The code contains solvers for both compressible and incompressible flows. It has been used primarily for studying Rayleigh-Taylor (R-T) and Richtmyer-Meshkov (R-M) instabilities, which occur in supernovae and Inertial Confinement Fusion (ICF).
Date:
November 1, 2004
Creator:
Cook, A. W.; Greenough, J. A.; Gygi, F.; Streitz, F. H.; Kubota, A.; Bulatov, V. V. et al.
Object Type:
Report
System:
The UNT Digital Library
East Texas Safari: Species Sightings at Tyler's Caldwell Zoo
Final draft of an article published in the November 2004 issue of Texas Highways magazine about Caldwell Zoo in Tyler.
Date:
November 2004
Creator:
Mallory, Randy
Object Type:
Text
System:
The UNT Digital Library
Ecological Characterization Data for the 2004 Composite Analysis
A composite analysis is required by U.S. Department of Energy (DOE) Order 435.1 to ensure public safety through the management of active and planned low-level radioactive waste disposal facilities associated with the Hanford Site. The original Hanford Site Composite Analysis of 1998 must be revised and submitted to DOE Headquarters (DOE-HQ) in 2004 because of revisions to waste site information in the 100, 200, and 300 Areas, updated performance assessments and environmental impact statements (EIS), changes in inventory estimates for key sites and constituents, and a change in the definition of offsite receptors. Beginning in fiscal year (FY) 2003, the DOE Richland Operations Office (DOE-RL) initiated activities, including the development of data packages, to support the 2004 Composite Analysis. This report describes the data compiled in FY 2003 to support ecological site assessment modeling for the 2004 Composite Analysis. This work was conducted as part of the Characterization of Systems Task of the Groundwater Remediation Project (formerly the Groundwater Protection Program) managed by Fluor Hanford, Inc., Richland, Washington. The purpose of this report is to provide summaries of the characterization information and available spatial data on the biological resources and ecological receptors found in the upland, riparian, aquatic, and island …
Date:
November 1, 2004
Creator:
Downs, Janelle L.; Simmons, Mary A.; Stegen, Jennifer A.; Bunn, Amoret L.; Tiller, Brett L.; Thorsten, Susan L. et al.
Object Type:
Report
System:
The UNT Digital Library
The Economic and Fiscal Impacts of Armed Forces Exchange Service Realignment on Dallas County and the City of Dallas
This report discusses economic issues with areas of the United States Armed Forces.
Date:
November 2004
Creator:
Clower, Terry L. & Weinstein, Bernard L.
Object Type:
Report
System:
The UNT Digital Library
Edwards Aquifer Authority General Manager's Report, November 2004
Monhtly newsletter of the general manage at the Edwards Aquifer Authority discussing news and activities of the organization as well as other information related to water in southern Texas.
Date:
November 2004
Creator:
Edwards Aquifer Authority (Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Effective Hamiltonian for non-leptonic |Delta F| = 1 decays at NNLO in QCD
The authors compute the effective hamiltonian for non-leptonic |{Delta}F| = 1 decays in the standard model including next-to-next-to-leading order QCD corrections. In particular, they present the complete three-loop anomalous dimension matrix describing the mixing of current-current and QCD penguin operators. The calculation is performed in an operator basis which allows to consistently use fully anticommuting {gamma}{sub 5} in dimensional regularization at an arbitrary number of loops. The renormalization scheme dependences and their cancellation in physical quantities is discussed in detail. Furthermore, they demonstrate how the results are transformed to a different basis of effective operators which is frequently adopted in phenomenological applications. They give all necessary two-loop constant terms which allow to obtain the three-loop anomalous dimensions and the corresponding initial conditions of the two-loop Wilson coefficients in the latter scheme. Finally, they solve the renormalization group equation and given the analytic expressions for the low-energy Wilson coefficients relevant for non-leptonic B meson decays beyond next-to-leading order in both renormalization schemes.
Date:
November 1, 2004
Creator:
Gorbahn, Martin; /Durham U., IPPP; Haisch, Ulrich & /Fermilab
Object Type:
Article
System:
The UNT Digital Library
Effects of a carbon tax on microgrid combined heat and power adoption
This paper describes the economically optimal adoption and operation of distributed energy resources (DER) by a hypothetical California microgrid consisting of a group of commercial buildings over an historic test year, 1999. The optimization is conducted using a customer adoption model (DER-CAM) developed at Berkeley Lab and implemented in the General Algebraic Modeling System (GAMS). A microgrid is a semiautonomous grouping of electricity and heat loads interconnected to the existing utility grid (macrogrid) but able to island from it. The microgrid minimizes the cost of meeting its energy requirements (consisting of both electricity and heat loads) by optimizing the installation and operation of DER technologies while purchasing residual energy from the local combined natural gas and electricity utility. The available DER technologies are small-scale generators (< 500 kW), such as reciprocating engines, microturbines, and fuel cells, with or without combined heat and power (CHP) equipment, such as water and space heating and/or absorption cooling. By introducing a tax on carbon emissions, it is shown that if the microgrid is allowed to install CHP-enabled DER technologies, its carbon emissions are mitigated more than without CHP, demonstrating the potential benefits of small-scale CHP technology for climate change mitigation. Reciprocating engines with heat …
Date:
November 1, 2004
Creator:
Siddiqui, Afzal S.; Marnay, Chris; Edwards, Jennifer L.; Firestone, Ryan M.; Ghosh, Srijay & Stadler, Michael
Object Type:
Article
System:
The UNT Digital Library
Electroweak physics at the Tevatron
The CDF and D0 experiments at the Tevatron have used p{bar p} collisions at {radical}s = 1.96 TeV to perform electroweak physics measurements. A program of precision electroweak tests of SM already started. Measurements performed are: W and Z bosons production cross section using different leptonic final states, dielectron Forward-Backward Asymmetry A{sub FB} and di-boson cross section production. We also report the prospects for the W mass measurements.
Date:
November 1, 2004
Creator:
Sidoti, A. & /Pisa U. /INFN, Pisa /Fermilab
Object Type:
Article
System:
The UNT Digital Library
[Elephant leaning over platform]
Photograph of an elephant standing on the edge of a platform to reach a stockpile of leaves surrounding it inside of the Caldwell Zoo, located in Tyler, Texas.
Date:
November 2004
Creator:
Mallory, Randy
Object Type:
Photograph
System:
The UNT Digital Library
Energy Design Guidelines for High Performance Schools: Arctic and Subarctic Climates
The Energy Design Guidelines for High Performance Schools--Arctic and Subarctic Climates provides school boards, administrators, and design staff with guidance to help them make informed decisions about energy and environmental issues important to school systems and communities. These design guidelines outline high performance principles for the new or retrofit design of your K-12 school in arctic and subarctic climates. By incorporating energy improvements into their construction or renovation plans, schools can significantly reduce energy consumption and costs.
Date:
November 1, 2004
Creator:
unknown
Object Type:
Book
System:
The UNT Digital Library
Energy Design Guidelines for High Performance Schools: Tropical Island Climates
The Energy Design Guidelines for High Performance Schools--Tropical Island Climates provides school boards, administrators, and design staff with guidance to help them make informed decisions about energy and environmental issues important to school systems and communities. These design guidelines outline high performance principles for the new or retrofit design of your K-12 school in tropical island climates. By incorporating energy improvements into their construction or renovation plans, schools can significantly reduce energy consumption and costs.
Date:
November 1, 2004
Creator:
unknown
Object Type:
Book
System:
The UNT Digital Library
Energy Performance Evaluation of an Educational Facility: The Adam Joseph Lewis Center for Environmental Studies, Oberlin College, Oberlin, Ohio
This final report gives findings from NREL's energy performance evaluation of the Adam Joseph Lewis Center for Environmental Studies, Oberlin College, Oberlin, Ohio.
Date:
November 1, 2004
Creator:
Pless, S. D. & Torcellini, P. A.
Object Type:
Report
System:
The UNT Digital Library
Enhanced Coal Reburning in Oxidizing Environments: Final Technical Report
Conventional fuel rich coal reburning relies upon two primary mechanisms: (1) the reaction of coal volatiles with NO to form HCN, which can subsequently decay to molecular nitrogen (N{sub 2}) given sufficient residence time at a suitable temperature; and (2), additional NO reduction by reaction of NO with carbon on the coal char surfaces. Recent research has indicated the possibility of HCN release as an additional product during char oxidation, and under appropriate conditions this HCN could provide a third mechanism for reducing NO to N{sub 2}. Lab-scale experiments and kinetic calculations were carried out to identify conditions that might lead to effective coal reburning under oxidizing conditions. The results of the kinetic calculations indicated that, depending on the temperature, oxygen concentrations in the range of 200 ppm to 1000 ppm (0.1%) would provide the greatest levels of gas phase reduction of NO using HCN, and that reductions between 60-80% are possible (in the absence of heterogeneous effects). Experiments using pulverized coal in a laminar flow drop tube furnace demonstrated NO reduction levels as high as 40-50%; however, these experiments were shown to have limited gas/coal contacting. The two different experimental configurations used demonstrated a clear dependence of observed NO …
Date:
November 1, 2004
Creator:
Eddings, Eric G.; Kelly, Kerry; Overacker, Dana W. & Thurston, Christopher R.
Object Type:
Report
System:
The UNT Digital Library
Equation of state and electrical conductivity of stainless steel.
Warm dense matter is the region in phase space of density and temperature where the thermal, Fermi, and Coulomb energies are approximately equal. The lack of a dominating scale and physical behavior makes it challenging to model the physics to high fidelity. For Sandia, a fundamental understanding of the region is of importance because of the needs of our experimental HEDP programs for high fidelity descriptive and predictive modeling. We show that multi-scale simulations of macroscopic physical phenomena now have predictive capability also for difficult but ubiquitous materials such as stainless steel, a transition metal alloy.
Date:
November 1, 2004
Creator:
Desjarlais, Michael Paul & Mattsson, Thomas Kjell Rene
Object Type:
Report
System:
The UNT Digital Library
Essentials: Caldwell Zoo
Text about the Caldwell Zoo in Tyler, Texas that was published in the "Essentials" section of a November 2004 Texas Highways magazine article.
Date:
November 2004
Creator:
Mallory, Randy
Object Type:
Text
System:
The UNT Digital Library
Estimate of the energy spread in a booster cycle via the bunch length measurement
It is important for us to obtain the information of energy spread vs. time in a Booster cycle via the same beam event, for the purpose of minimizing the error caused by the cycle-to-cycle fluctuation. The bunch length (BL) can be extracted from the resistive wall signal (RWS) at different times of a Booster cycle, and from which the energy spread can be estimated.
Date:
November 1, 2004
Creator:
Yang, Xi
Object Type:
Report
System:
The UNT Digital Library
Estimating Source Terms for Diverse Spent Nuclear Fuel Types
The U.S. Department of Energy (DOE) National Spent Nuclear Fuel Program is responsible for developing a defensible methodology for determining the radionuclide inventory for the DOE spent nuclear fuel (SNF) to be dispositioned at the proposed Monitored Geologic Repository at the Yucca Mountain Site. SNF owned by DOE includes diverse fuels from various experimental, research, and production reactors. These fuels currently reside at several DOE sites, universities, and foreign research reactor sites. Safe storage, transportation, and ultimate disposal of these fuels will require radiological source terms as inputs to safety analyses that support design and licensing of the necessary equipment and facilities. This paper summarizes the methodology developed for estimating radionuclide inventories associated with DOE-owned SNF. The results will support development of design and administrative controls to manage radiological risks and may later be used to demonstrate conformance with repository acceptance criteria.
Date:
November 1, 2004
Creator:
Carlsen, Brett & Pincock, Layne
Object Type:
Article
System:
The UNT Digital Library