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447 Matching Results
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Perry Daily Journal (Perry, Okla.), Vol. 111, No. 227, Ed. 1 Saturday, November 27, 2004
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 27, 2004
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Selective molecular recognition, C-H bond activation, and catalysis in nanoscale reaction vessels
Supramolecular chemistry represents a way to mimic enzyme reactivity by using specially designed container molecules. We have shown that a chiral self-assembled M{sub 4}L{sub 6} supramolecular tetrahedron can encapsulate a variety of cationic guests, with varying degrees of stereoselectivity. Reactive iridium guests can be encapsulated and the C-H bond activation of aldehydes occurs, with the host cavity controlling the ability of substrates to interact with the metal center based upon size and shape. In addition, the host container can act as a catalyst by itself. By restricting reaction space and preorganizing the substrates into reactive conformations, it accelerates the sigmatropic rearrangement of enammonium cations.
Date:
November 27, 2004
Creator:
Fiedler, Dorothea; Leung, Dennis H.; Raymond, Kenneth N. & Bergman, Robert G.
Object Type:
Article
System:
The UNT Digital Library
Advancing the Ion Beam Thin Film Planarization Process for the Smoothing of Substrate Particles
This report addresses the advancement of the ion beam thin film planarization process for the smoothing of substrate particles.
Date:
October 27, 2004
Creator:
Mirkarimi, P.; Spiller, E.; Baker, S.; Robinson, J.; Stearns, D.; Liddle, J. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 106, No. 179, Ed. 1 Wednesday, October 27, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 27, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, October 27, 2004
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
October 27, 2004
Creator:
Schwind, Jim & Looby, Edward
Object Type:
Newspaper
System:
The Portal to Texas History
Analysis of Radiation Induced Degradation in FPC-461 Fluoropolymers by Variable Temperature Multinuclear NMR
Solid state nuclear magnetic resonance techniques have been used to investigate aging mechanisms in a vinyl chloride:chlorotrifluoroethylene copolymer, FPC-461, due to exposure to {gamma}-radiation. Solid state {sup 1}H MAS NMR spectra revealed structural changes of the polymer upon irradiation under both air and nitrogen atmospheres. Considerable degradation is seen with {sup 1}H NMR in the vinyl chloride region of the polymer, particularly in the samples irradiated in air. {sup 19}F MAS NMR was used to investigate speciation in the chlorotrifluoroethylene blocks, though negligible changes were seen. {sup 1}H and {sup 19}F NMR at elevated temperature revealed increased segmental mobility and decreased structural heterogeneity within the polymer, yielding significant resolution enhancement over room temperature solid state detection. The effects of multi-site exchange are manifest in both the {sup 1}H and {sup 19}F NMR spectra as a line broadening and change in peak position as a function of temperature.
Date:
October 27, 2004
Creator:
Chinn, S C; Wilson, T S & Maxwell, R S
Object Type:
Article
System:
The UNT Digital Library
The Archer Advocate (Holliday, Tex.), Vol. 2, No. 30, Ed. 1 Wednesday, October 27, 2004
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
October 27, 2004
Creator:
Thomas, John
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 83, No. 328, Ed. 1 Wednesday, October 27, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 27, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Benefit/Cost Ratio in Systems Engineering: Integrated Models, Tests, Design, and Production
We have previously described our methodology for quantification of risk and risk reduction, and the use of risk, quantified as a dollar value, in the Value Engineering and decision tradeoff process. In this work we extend our example theme of the safety of reactive materials during accidental impacts. We have begun to place the validation of our impact safety model into a systems engineering context. In that sense, we have made connections between the data and the trends in the data, our models of the impact safety process, and the implications regarding confidence levels and reliability based on given impact safety requirements. We have folded this information into a quantitative risk assessment, and shown the assessed risk reduction value of developing an even better model, with more model work or more experimental data or both. Since there is a cost incurred for either model improvement or testing, we have used a Benefit/Cost Ratio metric to quantify this, where Benefit is our quantification of assessed risk reduction, and cost is the cost of the new test data, code development, and model validation. This has left us with further questions posed for our evolving system engineering representation for impact safety and its …
Date:
October 27, 2004
Creator:
Nitta, C; Logan, R; Chidester, S & Foltz, M F
Object Type:
Report
System:
The UNT Digital Library
Broadband Internet Access: Background and Issues
From a public policy perspective, the goals are to ensure that broadband deployment is timely, that industry competes fairly, and that service is provided to all sectors and geographical locations of American society. The federal government -- through Congress and the Federal Communications Commission (FCC) -- is seeking to ensure fair competition among the players so that broadband will be available and affordable in a timely manner to all Americans who want it. While the FCC's position is not to intervene at this time, some assert that legislation is necessary to ensure fair competition and timely broadband deployment. One proposal would ease certain legal restrictions and requirements, imposed by the Telecommunications Act of 1996, on incumbent telephone companies who provide high speed data (broadband) access. Another proposal would compel cable companies to provide "open access" to competing Internet service providers.
Date:
October 27, 2004
Creator:
Gilroy, Angele A. & Kruger, Lennard G.
Object Type:
Report
System:
The UNT Digital Library
Brownfields and Superfund Issues in the 108th Congress
This report discusses the Superfund program for cleaning up the nation's worst hazardous waste sites, created by the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, or CERCLA (P.L. 96-510, as amended). It includes recent development and background issues, superfund issues, revenue issues, comprehensive reauthorization, and legislation regarding superfund program.
Date:
October 27, 2004
Creator:
Reisch, Mark
Object Type:
Report
System:
The UNT Digital Library
Campaign Finance Legislation in the 108th Congress
As of October 11, 2004, 29 bills have been introduced in the 108th Congress to change the nation’s campaign finance laws (primarily under Titles 2 and 26 of the U.S. Code). These bills — 20 in the House and nine in the Senate — seek to make improvements in the current system, including to tighten perceived loopholes. In the wake of enactment of the Bipartisan Campaign Reform Act of 2002 (P.L. 107- 155), there has been decidedly less legislative activity in this area than in recent Congresses, which typically saw well over 100 campaign finance-related bills introduced.
Date:
October 27, 2004
Creator:
Cantor, Joseph E.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean Herald (Rusk, Tex.), Vol. 155, No. 36, Ed. 1 Wednesday, October 27, 2004
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
October 27, 2004
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
The Colony Courier-Leader (The Colony, Tex.), Vol. 23, No. 38, Ed. 1 Wednesday, October 27, 2004
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
October 27, 2004
Creator:
Sorter, Dave
Object Type:
Newspaper
System:
The Portal to Texas History
A comparison of somatic mutational spectra in healthy study populations from Russia, Sweden and USA
Comparison of mutation spectra at the hypoxanthine-phosphoribosyl transferase (HPRT) gene of peripheral blood T lymphocytes may provide insight into the aetiology of somatic mutation contributing to carcinogenesis and other diseases. To increase knowledge of mutation spectra in healthy people, we have analyzed HPRT mutant T-cells of 50 healthy Russians originally recruited as controls for a study of Chernobyl clean-up workers (Jones et al. Radiation Res. 158, 2002, 424). Reverse transcriptase polymerase chain reactions and DNA sequencing identified 161 independent mutations among 176 thioguanine resistant mutants. Forty (40) mutations affected splicing mechanisms and 27 deletions or insertions of 1 to 60 nucleotides were identified. Ninety four (94) single base substitutions were identified, including 62 different mutations at 55 different nucleotide positions, of which 19 had not previously been reported in human T-cells. Comparison of this base substitution spectrum with mutation spectra in a USA (Burkhart-Schultz et al. Carcinogenesis 17, 1996, 1871) and two Swedish populations (Podlutsky et al, Carcinogenesis 19, 1998, 557, Podlutsky et al. Mutation Res. 431, 1999, 325) revealed similarity in the type, frequency and distribution of mutations in the four spectra, consistent with aetiologies inherent in human metabolism. There were 15-19 identical mutations in the three pair-wise comparisons …
Date:
October 27, 2004
Creator:
Noori, P; Hou, S; Jones, I M; Thomas, C B & Lambert, B
Object Type:
Article
System:
The UNT Digital Library
Computational Modeling of K-shell Argon Spectra from Z-pinch Dynamic Hohlraum Experiments
Z-pinch dynamic hohlraum experiments on the Z-Machine at Sandia National Laboratories measured K-shell argon spectra using a focusing spectrometer with spatial resolution. The spectra are modeled using Hullac atomic data input, Cretin nonlocal thermodynamic equilibrium (nlte) atomic kinetics and radiative transfer calculations, and Dakota optimization capabilities. Hullac provides atomic structure and cross section data for Ar XIX, Ar XXVIII (n=1 (illegible) 5), Ar XXVII (n=1 (illegible) 10), and Ar XXVI (n=1 (illegible) 5), where n is the principal quantum number. Cretin calculates the area-integrated spectral intensity escaping an argon doped Dcapsule as a function of electron density, electron temperature, and capsule radius. Dakota optimizes the plasma properties for the best to the measured spectrum by minimizing an objective function comprise of argon spectral line ratios and full-width at half-maximums (fwhms). We highlight the framework of this general spectroscopic capability and discuss the extension to magnetized plasmas using Totalb spectral line shapes.
Date:
October 27, 2004
Creator:
Adams, M L; Sinars, D B; Scott, H A; Brandon, S T; Chung, H K & Lee, R W
Object Type:
Article
System:
The UNT Digital Library
The Cuero Record (Cuero, Tex.), Vol. 110, No. 43, Ed. 1 Wednesday, October 27, 2004
Weekly newspaper from Cuero, Texas that includes local, state, and national news along with advertising.
Date:
October 27, 2004
Creator:
Rea, Glenn
Object Type:
Newspaper
System:
The Portal to Texas History
Effects of Substrate Surface Defects and Te Dopant Concentration on Crystalline Quality and Electrical Characteristics of AlGaAsSb Epitaxial Layers
Tellurium doped AlGaAsSb epitaxial layers were grown lattice-matched on GaSb substrates and lattice-mismatched on semi-insulating GaAs substrates by organometallic vapor phase epitaxy. Secondary ion mass spectroscopy and Hall data showed that the ratio of carrier concentration to Te concentration decreases from 40% to 5% when the Te concentration increases from 4.8 x 10{sup 17} cm{sup -3} to 1.3 x 10{sup 19} cm{sup -3}. Transmission electron microscopy (TEM) showed that the material with heavily doped Te generates a high density (about 10{sup 8} cm{sup 2}) of planar defects. Most of the Te-related defects originate at the GaSb buffer layer/AlGaAsSb epilayer interface. In addition, discrete precipitates were observed in the heavily doped AlGaAsSb layer. TEM imaging revealed amorphous defects (likely residual native oxides) along the GaSb substrate/GaSb buffer interface. High resolution TEM imaging revealed high quality growth beyond the GaSb-buffer/GaSb-substrate interfacial defects. The microstructural impact of GaSb-buffer/GaSb-substrate interface defects on the crystalline quality of AlGaAsSb layers is insignificant.
Date:
October 27, 2004
Creator:
Ehsani, H.; Lewis, N.; Nichols, G.; Danielson, L.; Dashiell, M.; Shellenbarger, Z. et al.
Object Type:
Article
System:
The UNT Digital Library
The Employee Free Choice Act
None
Date:
October 27, 2004
Creator:
Shimabukuru, Jon O.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Features, Events, and Processes (FEP) for the Biosphere Model
The purpose of this analysis report is to evaluate and document the inclusion or exclusion of biosphere features, events, and processes (FEPs) with respect to modeling used to support the total system performance assessment (TSPA) for the license application (LA). A screening decision, either ''Included'' or ''Excluded'', is given for each FEP along with the corresponding technical basis for the excluded FEPs and the descriptions of how the included FEPs were incorporated in the biosphere model. This information is required by the U.S. Nuclear Regulatory Commission (NRC) regulations at 10 CFR 63.114 (d, e, and f) [DIRS 156605]. The FEPs addressed in this report concern characteristics of the reference biosphere, the receptor, and the environmental transport and receptor exposure pathways for the groundwater and volcanic ash exposure scenarios considered in biosphere modeling. This revision provides the summary of the implementation of included FEPs in TSPA-LA, (i.e., how the FEP is included); for excluded FEPs, this analysis provides the technical basis for exclusion from TSPA-LA (i.e., why the FEP is excluded). This report is one of the 10 documents constituting the biosphere model documentation suite. A graphical representation of the documentation hierarchy for the biosphere model is presented in Figure 1-1. …
Date:
October 27, 2004
Creator:
Wasiolek, M. & Rogers, P.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, October 27, 2004
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 27, 2004
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The FCC's Political Broadcasting Regulations
This report provides an overview of the Federal Communication Commission's political broadcasting regulations, including general public interest obligations; the equal opportunity (equal time) regulations; and the various interpretations of the Fairness Doctrine, which is no longer enforced by the Commission. A brief section of frequently asked questions regarding political broadcasting is also provided.
Date:
October 27, 2004
Creator:
Welborn, Angie A.
Object Type:
Report
System:
The UNT Digital Library
The FCC’s Political Broadcasting Regulations
None
Date:
October 27, 2004
Creator:
Welborn, Angie A.
Object Type:
Report
System:
The UNT Digital Library
Global Climate Change: The Kyoto Protocol
This report discusses the Kyoto Protocol to the United Nations Framework Convention on Climate Change (UNFCCC) that was completed December 11, 1997, committing the industrialized nations to specified, legally binding reductions in emissions of six “greenhouse gases.”
Date:
October 27, 2004
Creator:
Fletcher, Susan R.
Object Type:
Report
System:
The UNT Digital Library