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Altus Times (Altus, Okla.), Vol. 105, No. 237, Ed. 1 Friday, December 19, 2003
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 19, 2003
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 81, No. 382, Ed. 1 Friday, December 19, 2003
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 19, 2003
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 97, No. 102, Ed. 1 Friday, December 19, 2003
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
December 19, 2003
Creator:
Cartwright, Brian & Morgan, Clay
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, December 19, 2003
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
December 19, 2003
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Campaign Finance Law: The Supreme Court Upholds Key Provisions of BCRA in McConnell v. FEC
This report discusses the Supreme Court's decision in McConnell v. FEC. The court upheld against facial constitutional challenges key portions of the Bipartisan Campaign Reform Act of 2002 (BCRA), (P.L. 107-155, commonly known as the McCain-Feingold or Shays-Meehan campaign finance reform law).
Date:
December 19, 2003
Creator:
Whitaker, L. Paige
Object Type:
Report
System:
The UNT Digital Library
The CDF Run IIa Silicon Detector and Its Upgrade RunIIb
The CDF RunIIa silicon detector made the transition from commissioning to data taking. CDF's online and offline tracking algorithms, the performance of Layer 00 and the RunIIb silicon upgrade project are covered in this article.
Date:
December 19, 2003
Creator:
Issever, Cigdem
Object Type:
Article
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 108, No. 102, Ed. 1 Friday, December 19, 2003
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 19, 2003
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Cold asymmetrical fermion superfluids
The recent experimental advances in cold atomic traps have induced a great amount of interest in fields from condensed matter to particle physics, including approaches and prospects from the theoretical point of view. In this work we investigate the general properties and the ground state of an asymmetrical dilute gas of cold fermionic atoms, formed by two particle species having different densities. We have show in a recent paper, that a mixed phase composed of normal and superfluid components is the energetically favored ground state of such a cold fermionic system. Here we extend the analysis and verify that in fact, the mixed phase is the preferred ground state of an asymmetrical superfluid in various situations. We predict that the mixed phase can serve as a way of detecting superfluidity and estimating the magnitude of the gap parameter in asymmetrical fermionic systems.
Date:
December 19, 2003
Creator:
Caldas, Heron
Object Type:
Article
System:
The UNT Digital Library
Commemorative Observances: A Chronological List
This report mainly discusses a Chronological List on Commemorative Observances for 2003 and 2004,indicating the proclamation number and its federal registration citation.
Date:
December 19, 2003
Creator:
Fischer, Hannah
Object Type:
Report
System:
The UNT Digital Library
Computational Chemistry and Reaction Engineering Workbench
The chemical process industries are among the most energy intensive in the US. While much of the energy use cannot be avoided, (e.g., feedstock energy or separations costs), there are tremendous gains to be had through simulation-based optimizations. The heart of any chemical operation is the chemical reactor and it is here that gains can be made either directly (e.g., reduced heat flux) or indirectly (e.g., reduced downstream separations cost due to more efficient reactor design). The objective of this project was to develop an integrated suite of software to facilitate the simulation and optimization of chemical reactors. In the phase of the project supported by this grant, we focused specifically on gas-phase chemical processes such as combustion and pyrolysis.
Date:
December 19, 2003
Creator:
Mckinnon, J. Thomas
Object Type:
Report
System:
The UNT Digital Library
Congressional Roll Call and Other Record Votes: First Congress Through 108th Congress, First Session, 1789 Through 2003
None
Date:
December 19, 2003
Creator:
Pontius, John
Object Type:
Report
System:
The UNT Digital Library
D0 silicon trackers
The present Fermilab D0 silicon microstrip tracker, the silicon microstrip tracker which was designed to replace it, and plans for upgrading the present silicon tracker are described.
Date:
December 19, 2003
Creator:
Cooper, W. E.
Object Type:
Article
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 20, No. 35, Ed. 1 Friday, December 19, 2003
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
December 19, 2003
Creator:
Vercher, Dennis
Object Type:
Newspaper
System:
The UNT Digital Library
Density Changes in Plutonium Observed from Accelerated Aging using Pu-238 Enrichment
Plutonium, because of its radioactive nature, ages from the ''inside out'' by means of self-irradiation damage and thus produces Frankel-type defects (vacancies and self-interstitial atoms) and defect clusters. The self-irradiation damage in Plutonium-239 occurs mainly by {alpha}-particle decay, where most of the damage comes from the U-235 recoil nucleus. The defects resulting from the residual lattice damage and helium in-growth could result in microstructural and physical property changes. Because these self-irradiation effects would normally require decades to measure, with a fraction (7.5 wt%) of Pu-238 is added to the reference plutonium alloy thus accelerating the aging process by approximately 18 times the normal rate. By monitoring the properties of the Pu-238 spiked alloy over a period of about 3.5 years, the properties of plutonium in storage can be projected for periods up to about 60 years. This paper presents density and volume changes observed from the immersion density and dilatometry measurements equivalent to aging the reference plutonium alloys to nine years.
Date:
December 19, 2003
Creator:
Chung, B. W.; Thompson, S. R.; Woods, C. H.; Hopkins, D. J.; Gourdin, W. H. & Ebbinghaus, B. B.
Object Type:
Article
System:
The UNT Digital Library
Enhancing the Atomic-Level Understanding of co2 Mineral Sequestration Mechanisms via Advanced Computational Modeling
Fossil fuels currently provide 85% of the world's energy needs, with the majority coming from coal, due to its low cost, wide availability, and high energy content. The extensive use of coal-fired power assumes that the resulting CO{sub 2} emissions can be vented to the atmosphere. However, exponentially increasing atmospheric CO{sub 2} levels have brought this assumption under critical review. Over the last decade, this discussion has evolved from whether exponentially increasing anthropogenic CO{sub 2} emissions will adversely affect the global environment, to the timing and magnitude of their impact. A variety of sequestration technologies are being explored to mitigate CO{sub 2} emissions. These technologies must be both environmentally benign and economically viable. Mineral carbonation is an attractive candidate technology as it disposes of CO{sub 2} as geologically stable, environmentally benign mineral carbonates, clearly satisfying the first criteria. The primary challenge for mineral carbonation is cost-competitive process development. CO{sub 2} mineral sequestration--the conversion of stationary-source CO{sub 2} emissions into mineral carbonates (e.g., magnesium and calcium carbonate, MgCO{sub 3} and CaCO{sub 3})--has recently emerged as one of the most promising sequestration options, providing permanent CO{sub 2} disposal, rather than storage. In this approach a magnesium-bearing feedstock mineral (typically serpentine or olivine; …
Date:
December 19, 2003
Creator:
Chizmeshya, A. V. G.
Object Type:
Report
System:
The UNT Digital Library
Experimental and Computational Study of Nonpremixed Ignition of Dimethyl Ether in Counterflow
The ignition temperature of nitrogen-diluted dimethyl ether (DME) by heated air in counterflow was experimentally determined for DME concentration from 5.9 to 30%, system pressure from 1.5 to 3.0 atmospheres, and pressure-weighted strain rate from 110 to 170/s. These experimental data were compared with two mechanisms that were respectively available in 1998 and 2003, with the latter being a substantially updated version of the former. The comparison showed that while the 1998-mechanism uniformly over-predicted the ignition temperature, the 2003-mechanism yielded surprisingly close agreement for all experimental data. Sensitivity analysis for the near-ignition state based on both mechanisms identified the deficiencies of the 1998-mechanism, particularly the specifics of the low-temperature cool flame chemistry in effecting ignition at higher temperatures, as the fuel stream is being progressively heated from its cold boundary to the high-temperature ignition region around the hot-stream boundary. The 2003-mechanism, consisting of 79 species and 398 elementary reactions, was then systematically simplified by using the directed relation graph method to a skeletal mechanism of 49 species and 251 elementary reactions, which in turn was further simplified by using computational singular perturbation method and quasi-steady-state species assumption to a reduced mechanism consisting of 33 species and 28 lumped reactions. It …
Date:
December 19, 2003
Creator:
Zheng, X L; Lu, T F; Law, C K & Westbrook, C K
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, December 19, 2003
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 19, 2003
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Failure by fracture and fatigue in 'NANO' and 'BIO'materials
The behavior of nanostructured materials/small-volumestructures and biologi-cal/bio-implantable materials, so-called "nano"and "bio" materials, is currently much in vogue in materials science. Oneaspect of this field, which to date has received only limited attention,is their fracture and fatigue properties. In this paper, we examine twotopics in this area, namely the premature fatigue failure ofsilicon-based micron-scale structures for microelectromechanical systems(MEMS), and the fracture properties of mineralized tissue, specificallyhuman bone.
Date:
December 19, 2003
Creator:
Ritchie, R. O.; Muhlstein, C. L. & Nalla, R. K.
Object Type:
Article
System:
The UNT Digital Library
Final Scientific Report DE-FGO3-97ER62460 Stomatal Responses to CO2: A Comparison of Woody and Herbaceous Species in Arid and Humid Climates
OAK-B135 The project involved a study of a fundamental response of terrestrial vegetation to rising atmospheric carbon dioxide (CO2) concentration, namely, the change in leaf conductance to gas diffusion associated with a change in the aperture of the microscopic pores (stomata) on the surface of leaves.
Date:
December 19, 2003
Creator:
Koch, George W.
Object Type:
Report
System:
The UNT Digital Library
First Responder Resources: The Homeland Defense Equipment Reuse Program — Description and Issues
None
Date:
December 19, 2003
Creator:
Medalia, Jonathan
Object Type:
Report
System:
The UNT Digital Library
Flame Inhibition by Phosphorus-Containing Compounds in Lean and Rich Propane Flames
Chemical inhibition of laminar propane flames by organophosphorus compounds has been studied experimentally, using a laboratory Mache Hebra nozzle burner and a flat flame burner with molecular beam mass spectrometry (MBMS), and with a computational flame model using a detailed chemical kinetic reaction mechanism. Both fuel-lean and fuel-rich propane flames were studied to examine the role of equivalence ratio in flame inhibition. The experiments examined a wide variety of organophosphorus compounds. We report on the experimental species flame profiles for tri-methyl phosphate (TMP) and compare them with the species flame profile results from modeling of TMP and di-methyl methyl phosphonate (DMMP). Both the experiments and kinetic modeling support and illustrate previous experimental studies in both premixed and non-premixed flames that inhibition efficiency is effectively the same for all of the organophosphorus compounds examined, independent of the molecular structure of the initial inhibitor molecule. The chemical inhibition is due to reactions involving the small P-bearing species HOPO{sub 2} and HOPO that are produced by the organophosphorus compounds (OPCs). The ratios of the HOPO{sub 2} and HOPO concentrations differ between the lean and rich flames, with HOPO{sub 2} dominant in lean flames while HOPO dominates in rich flames. The resulting HOPO{sub 2} …
Date:
December 19, 2003
Creator:
Curran, H; Korobeinichev, O P; Shvartsberg, V M; Shmakov, A G; Bolshova, T A; Jayaweera, T M et al.
Object Type:
Article
System:
The UNT Digital Library
Freight Transportation: Strategies Needed to Address Planning and Financing Limitations
A letter report issued by the General Accounting Office with an abstract that begins "The strong productivity gains in the U.S. economy have hinged in part on transportation networks working more efficiently. The nation's ports, which handle 95 percent of overseas freight tonnage, are a key link in this network, and efficient intermodal links between ship, rail, and highways are vital to continued productivity gains. GAO was asked to address (1) the challenges to freight mobility, (2) the limitations key stakeholders have encountered in addressing these challenges, and (3) strategies that may aid decision makers in enhancing freight mobility. GAO's work was based on a synthesis of previous studies and a review of conditions at 10 ports and surrounding areas that handle almost two-thirds of all containers moving in and out of the country."
Date:
December 19, 2003
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Global Climate Change
This report briefly reviews the status of climate science, international negotiations, and congressional activity focused specifically on climate change.
Date:
December 19, 2003
Creator:
Justus, John R. & Fletcher, Susan R.
Object Type:
Report
System:
The UNT Digital Library
The Harper News (Harper, Tex.), Vol. 1, No. 4, Ed. 1 Friday, December 19, 2003
Biweekly newspaper from Harper, Texas that includes community news along with advertising.
Date:
December 19, 2003
Creator:
Stevens, Martha
Object Type:
Newspaper
System:
The Portal to Texas History