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1,221 Matching Results
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FINAL REPORT FOR THE STUDY ON S-IMPLANTED ALLOY 22 IN 1 M NACI SOLUTIONS
None
Date:
November 22, 2005
Creator:
/a, n
Object Type:
Report
System:
The UNT Digital Library
Advances in Normal Conducting Accelerator Technology from the X-Band Linear Collider Program
In the mid-1990's, groups at SLAC and KEK began dedicated development of X-band (11.4 GHz) rf technology for a next generation, TeV-scale linear collider. The choice of a relatively high frequency, four times that of the SLAC 50 GeV Linac, was motivated by the cost benefits of having lower rf energy per pulse (hence fewer rf sources) and reasonable efficiencies at high gradients (hence shorter linacs). To realize such savings, however, requires operation at gradients and peak powers much higher than that hitherto achieved. During the past twelve years, these challenges were met through innovations on several fronts. This paper reviews these achievements, which include developments in the generation and transport of high power rf, and new insights into high gradient limitations.
Date:
June 22, 2005
Creator:
Adolphsen, C.
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 20, No. 38, Ed. 1 Thursday, September 22, 2005
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
September 22, 2005
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Hybridization in the Ensatina Ring Species, Strong selection against hybrids at a hybrid zone in the ensatina ring species complex and its evolutionary implications
The analysis of interactions between lineages at varying levels of genetic divergence can provide insights into the process of speciation through the accumulation of incompatible mutations. Ring species, and especially the Ensatina eschscholtzii system exemplify this approach. The plethodontid salamanders Ensatina eschscholtzii xanthoptica and Ensatina eschscholtzii platensis hybridize in the Central Sierran foothills of California. We compared the genetic structure across two transects (southern and northern Calaveras Co.), one of which was re-sampled over 20 years, and examined diagnostic molecular markers (eight allozyme loci and mitochondrial DNA) and a diagnostic quantitative trait (color pattern). Key results across all studies were: (i) cline centers for all markers were coincident and the zones were narrow, with width estimates of 730m to 2000m; (ii) cline centers at the northern Calaveras transect were coincident between 1981 and 2001, demonstrating repeatability over 5 generations; (iii) there are very few if any putative F1's, but a relatively high number of backcrossed individuals (57-86 percent) in the central portion of transects; (iv) we found substantial linkage disequilibrium in all three studies and strong heterozygote deficit both in northern Calaveras, in 2001, and southern Calaveras. Both linkage disequilibrium and heterozygote deficit show maximum values near the center of …
Date:
April 22, 2005
Creator:
Alexandrino, Joao; Baird, Stuart J.E.; Lawson, Lucinda; Macey, J. Robert; Moritz, Craig & Wake, David B.
Object Type:
Article
System:
The UNT Digital Library
Women in the United States Congress: 1917-2005
This report identifies the names, committee assignments, dates of service, and (for Representatives) districts of the 229 women Members of Congress.
Date:
September 22, 2005
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Material-dependent high-frequency current fluctuations of cathodicvacuum arcs: Evidence for the ecton cutoff of the fractal model
Current fluctuations of cathodic arcs were recorded withhigh analog bandwidth (up to 1 GHz) and fast digital sampling (up to 5Gsamples/sec). The power spectral density of the arc current wasdetermined by fast Fourier transform clearly showing material dependent,non-linear features in the frequency domain. These features can beassociated with the non-linear impedance of the conducting channelbetween cathode and anode, driven by the explosive nature of electronemission and plasma formation. The characteristic times of less than 100ns can be associated with individual explosive processes, "ectons," andtherefore represent the short-time physical cutoff for the fractal modelof cathodic arcs.
Date:
December 22, 2005
Creator:
Anders, Andre & Oks, Efim
Object Type:
Article
System:
The UNT Digital Library
A Comparison of EPIcode and ALOHA Calculations for Pool Evaporation and Chemical Atmospheric Transport and Dispersion.
EPIcode (version 7.0) and ALOHA (version 5.2.3) are two of the designated toolbox codes identified in the Department of Energy's Implementation Plan for DNFSB Recommendation 2002-1 on Software Quality Assurance issues in the DOE Complex. Both have the capability to estimate evaporation rates from pools formed from chemical spills and to predict subsequent atmospheric transport and dispersion. This paper provides an overview of the algorithms used by EPIcode and ALOHA to calculate evaporation rates and downwind plume concentrations. The technical bases for these algorithms are briefly discussed, and differences in the EPIcode and ALOHA methodologies highlighted. In addition, sample calculations are performed using EPIcode and ALOHA for selected chemicals under various environmental conditions. Side-by-side comparisons of results from sample calculations are analyzed to illustrate the impact that the different methodologies used by EPIcode and ALOHA have on predicted evaporation rates and downwind concentrations.
Date:
April 22, 2005
Creator:
Andrew, VINCENT
Object Type:
Article
System:
The UNT Digital Library
Insulating Structural Ceramics Program, Final Report
New materials and corresponding manufacturing processes are likely candidates for diesel engine components as society and customers demand lower emission engines without sacrificing power and fuel efficiency. Strategies for improving thermal efficiency directly compete with methodologies for reducing emissions, and so the technical challenge becomes an optimization of controlling parameters to achieve both goals. Approaches being considered to increase overall thermal efficiency are to insulate certain diesel engine components in the combustion chamber, thereby increasing the brake mean effective pressure ratings (BMEP). Achieving higher BMEP rating by insulating the combustion chamber, in turn, requires advances in material technologies for engine components such as pistons, port liners, valves, and cylinder heads. A series of characterization tests were performed to establish the material properties of ceramic powder. Mechanical chacterizations were also obtained from the selected materials as a function of temperature utilizing ASTM standards: fast fracture strength, fatique resistance, corrosion resistance, thermal shock, and fracture toughness. All ceramic materials examined showed excellent wear properties and resistance to the corrosive diesel engine environments. The study concluded that the ceramics examined did not meet all of the cylinder head insert structural design requirements. Therefore we do not recommend at this time their use for …
Date:
November 22, 2005
Creator:
Andrews, Mark J.; Tandon, Raj; Ott, Eric; Hind, Abi Akar; Long, Mike; Jensen, Robert et al.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 106, No. 273, Ed. 1 Tuesday, February 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 106, No. 296, Ed. 1 Tuesday, March 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 19, Ed. 1 Friday, April 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 43, Ed. 1 Sunday, May 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 69, Ed. 1 Wednesday, June 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 95, Ed. 1 Friday, July 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 121, Ed. 1 Monday, August 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 148, Ed. 1 Thursday, September 22, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 22, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Individuals with Disabilities Education Act (IDEA): Interactions with Selected Provisions of the No Child Left Behind Act (NCLBA)
The Individuals with Disabilities Education Act (IDEA)1 and the No Child Left Behind Act (NCLBA)2 are two of the most significant federal statutes relating to education. Although both have the goal of improving education — IDEA for children with disabilities and NCLBA for all children — the two statutes take different approaches. IDEA focuses on the individual child, with an emphasis on developing an individualized education program (IEP) and specific services for children with disabilities, while NCLBA takes a more global view, with an emphasis on closing gaps in achievement test scores and raising the aggregate scores of all demographic groups of pupils to specific levels. The relationship of IDEA and NCLBA has become of increasing significance because of the recent reauthorization of IDEA and guidance and regulations from the U.S. Department of Education (ED) on NCLBA issues related to the education of children with disabilities. This report will provide a brief overview of IDEA and NCLBA, a discussion of the intersection of selected provisions of IDEA and NCLBA, and a discussion of ED regulations and guidance regarding IDEA and NCLBA. The report concludes with a discussion of possible issues related to the interaction of IDEA and NCLBA.
Date:
December 22, 2005
Creator:
Apling, Richard N. & Jones, Nancy L.
Object Type:
Report
System:
The UNT Digital Library
The Individuals with Disabilities Education Act (IDEA): Interactions with Selected Provisions of the No Child Left Behind Act (NCLBA)
The Individuals with Disabilities Education Act (IDEA) and the No Child Left Behind Act (NCLBA) are two of the most significant federal statutes relating to education. Although both have the goal of improving education — IDEA for children with disabilities and NCLBA for all children — the two statutes take different approaches. IDEA focuses on the individual child, with an emphasis on developing an individualized education program (IEP) and specific services for children with disabilities, while NCLBA takes a more global view, with an emphasis on closing gaps in achievement test scores and raising the aggregate scores of all demographic groups of pupils to specific levels. The relationship of IDEA and NCLBA has become of increasing significance because of this recent reauthorization of IDEA and guidance and regulations from the U.S. Department of Education (ED) on NCLBA issues related to the education of children with disabilities. This report will provide a brief overview of IDEA and NCLBA, a discussion of the intersection of selected provisions of IDEA and NCLBA, and a discussion of ED regulations and guidance regarding IDEA and NCLBA. The report concludes with a discussion of possible issues related to the interaction of IDEA and NCLBA.
Date:
December 22, 2005
Creator:
Apling, Richard N. & Jones, Nancy Lee
Object Type:
Report
System:
The UNT Digital Library
Determination of |Vub| from Measurementsof the Electron and Neutrino Momenta inInclusive Semileptonic B Decays
None
Date:
June 22, 2005
Creator:
Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the B0 to D* D_s*+ and D_s+ to phi pi+ Branching Fractions
The authors present measurements of the branching fractions {Beta}(B{sup 0} {yields} D*{sup -}D*{sub s}{sup +}) and {Beta}(D{sub s}{sup +} {yields} {phi}{pi}{sup +}), based on 123 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} B factory. A partial reconstruction technique is used to measure {Beta}(B{sup 0} {yields} D*{sup -}D*{sub s}{sup +}) and the decay chain is fully reconstructed to measure the branching fraction product {Beta}(B{sup 0} {yields} D*{sup -} D*{sub s}{sup +}) x {Beta}(D{sub s}{sup +} {yields} {phi}{pi}{sup +}). Comparing these two measurements provides a model-independent determination of the D{sub s}{sup +} {yields} {phi}{pi}{sup +} branching fraction. They obtain {Beta}(B{sup 0} {yields} D*{sup -}D*{sub s}{sup +}) = (1.88 {+-} 0.09 {+-} 0.17)% and {Beta}(D{sub s}{sup +} {yields} {phi}{pi}{sup +}) = (4.81 {+-} 0.52 {+-} 0.38)%, where the first uncertainties are statistical and the second systematic.
Date:
June 22, 2005
Creator:
Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.
Object Type:
Article
System:
The UNT Digital Library
Science & Technology Review October 2005
This month's issue has the following articles: (1) Important Missions, Great Science, and Innovative Technology--Commentary by Cherry A. Murray; (2) NanoFoil{reg_sign} Solders with Less Heat--Soldering and brazing to join an array of materials are now Soldering and brazing to join an array of materials are now possible without furnaces, torches, or lead; (3) Detecting Radiation on the Move--An award-winning technology can detect even small amounts An award-winning technology can detect even small amounts of radioactive material in transit; (4) Identifying Airborne Pathogens in Time to Respond--A mass spectrometer identifies airborne spores in less than A mass spectrometer identifies airborne spores in less than a minute with no false positives; (5) Picture Perfect with VisIt--The Livermore-developed software tool VisIt helps scientists The Livermore-developed software tool VisIt helps scientists visualize and analyze large data sets; (6) Revealing the Mysteries of Water--Scientists are using Livermore's Thunder supercomputer and new algorithms to understand the phases of water; and (7) Lightweight Target Generates Bright, Energetic X Rays--Livermore scientists are producing aerogel targets for use in inertial Livermore scientists are producing aerogel targets for use in inertial confinement fusion experiments and radiation-effects testing.
Date:
August 22, 2005
Creator:
Aufderheide, M. B., III
Object Type:
Report
System:
The UNT Digital Library
Highly Parallel, High-Precision Numerical Integration
This paper describes a scheme for rapidly computing numerical values of definite integrals to very high accuracy, ranging from ordinary machine precision to hundreds or thousands of digits, even for functions with singularities or infinite derivatives at endpoints. Such a scheme is of interest not only in computational physics and computational chemistry, but also in experimental mathematics, where high-precision numerical values of definite integrals can be used to numerically discover new identities. This paper discusses techniques for a parallel implementation of this scheme, then presents performance results for 1-D and 2-D test suites. Results are also given for a certain problem from mathematical physics, which features a difficult singularity, confirming a conjecture to 20,000 digit accuracy. The performance rate for this latter calculation on 1024 CPUs is 690 Gflop/s. We believe that this and one other 20,000-digit integral evaluation that we report are the highest-precision non-trivial numerical integrations performed to date.
Date:
April 22, 2005
Creator:
Bailey, David H. & Borwein, Jonathan M.
Object Type:
Article
System:
The UNT Digital Library
Energy Policy: Comprehensive Energy Legislation (H.R. 6) in the 109th Congress
The House passed H.R. 6, the Energy Policy Act of 2005, on April 21, 2005 (249-183). The legislation includes a “safe harbor” provision to protect methyl tertiary-butyl ether (MTBE) refiners from product liability suits, which was retained after a close vote on an amendment to drop the language (213-219). In the 108th Congress, there was opposition to this provision in the Senate. It is unclear how its inclusion may affect Senate passage of an energy bill in the 109th Congress. House Republicans have indicated that a compromise will be sought to satisfy the other body. Language in the House-passed bill would also authorize opening of the Arctic National Wildlife Refuge (ANWR) to exploration and development. An amendment to delete the ANWR provisions from H.R. 6 was defeated (200-231).
Date:
April 22, 2005
Creator:
Bamberger, Robert L. & Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
Energy Policy: Comprehensive Energy Legislation (H.R. 6, S. 10) in the 109th Congress
Conferees on H.R. 6, the Energy Policy Act of 2005, began meeting July 14, 2005, and are predicting that the conference will be completed July 25. The Senate passed its version of the bill June 28, and the House passed its version April 21. The Senate and House bills are similar, but major differences exist, including the following areas: ethanol and methyl tertiary-butyl ether, Arctic National Wildlife Refuge, electricity restructuring, renewable energy, climate change, tax provisions, outer continental shelf, and the siting of LNG terminals
Date:
July 22, 2005
Creator:
Bamberger, Robert L. & Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library