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2011 Dynamics at Surfaces Gordon Research Conference (August 7-12, 2011, Salve Regina University, Newport, Rhode Island) (open access)

2011 Dynamics at Surfaces Gordon Research Conference (August 7-12, 2011, Salve Regina University, Newport, Rhode Island)

The 2011 Gordon Conference on Dynamics at Surfaces is the 32nd anniversary of a meeting held every two years that is attended by leading researchers in the area of experimental and theoretical dynamics at liquid and solid surfaces. The conference focuses on the dynamics of the interaction of molecules with either liquid or solid surfaces, the dynamics of the outermost layer of liquid and solid surfaces and the dynamics at the liquid-solid interface. Specific topics that are featured include state-to-state scattering dynamics, chemical reaction dynamics, non-adiabatic effects in reactive and inelastic scattering of molecules from surfaces, single molecule dynamics at surfaces, surface photochemistry, ultrafast dynamics at surfaces, and dynamics at water interfaces. The conference brings together investigators from a variety of scientific disciplines including chemistry, physics, materials science, geology, biophysics, and astronomy.
Date: August 12, 2011
Creator: Sitz, Greg
Object Type: Text
System: The UNT Digital Library
2011 X-Ray Science Gordon Research Conference (August 7-12, 2011, Colby, College. Waterville, ME) (open access)

2011 X-Ray Science Gordon Research Conference (August 7-12, 2011, Colby, College. Waterville, ME)

The 2011 Gordon Research Conference on X-ray Science will feature forefront x-ray-based science enabled by the rapid improvements in synchrotron and x-ray laser sources. Across the world, x-ray sources are playing an increasingly important role in physics, materials, chemistry, and biology, expanding into ever broadening areas of science and engineering. With the first hard x-ray free electron laser source beginning operation and with other advanced x-ray sources operational and planned, it is a very exciting and pivotal time for exchange ideas about the future of x-ray science and applications. The Conference will provide the forum for this interaction. An international cast of speakers will illuminate sessions on ultrafast science, coherence, imaging, in situ studies, extreme conditions, new developments in optics, sources, and detectors, inelastic scattering, nanoscience, life science, and energy sciences. The Conference will bring together investigators at the forefront of these areas, and will provide a venue for young scientists entering a career in x-ray research to present their research in poster format, hold discussions in a friendly setting, and exchange ideas with leaders in the field. Some poster presenters will be selected for short talks. The collegial atmosphere of this Conference, with ample time for discussion as well …
Date: August 12, 2011
Creator: Stephenson, Gregory
Object Type: Article
System: The UNT Digital Library
Adventures in Holographic Dimer Models (open access)

Adventures in Holographic Dimer Models

We abstract the essential features of holographic dimer models, and develop several new applications of these models. Firstly, semi-holographically coupling free band fermions to holographic dimers, we uncover novel phase transitions between conventional Fermi liquids and non-Fermi liquids, accompanied by a change in the structure of the Fermi surface. Secondly, we make dimer vibrations propagate through the whole crystal by way of double trace deformations, obtaining nontrivial band structure. In a simple toy model, the topology of the band structure experiences an interesting reorganization as we vary the strength of the double trace deformations. Finally, we develop tools that would allow one to build, in a bottom-up fashion, a holographic avatar of the Hubbard model.
Date: August 12, 2011
Creator: Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC; Karch, Andreas; /Washington U., Seattle; Yaida, Sho & /Stanford U., Phys. Dept.
Object Type: Article
System: The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 112, No. 89, Ed. 1 Friday, August 12, 2011 (open access)

The Altus Times (Altus, Okla.), Vol. 112, No. 89, Ed. 1 Friday, August 12, 2011

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: August 12, 2011
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
Analysis of the D+ --> K- pi+ e+ nu_e decay channel (open access)

Analysis of the D+ --> K- pi+ e+ nu_e decay channel

Using 347.5 fb{sup -1} of data recorded by the BABAR detector at the PEP-II electron-positron collider, 244 x 10{sup 3} signal events for the D{sup +} {yields} K{sup -}{pi}{sup +}e{sup +}{nu}{sub e} decay channel are analyzed. This decay mode is dominated by the {bar K}*(892){sup 0} contribution. We determine the {bar K}*(892){sup 0} parameters: m{sub K*(892){sup 0}} = (895.4{+-}0.2{+-}0.2) MeV/c{sup 2}, {Lambda}{sub K*(892){sup 0}}{sup 0} = (46.5{+-}0.3{+-}0.2) MeV/c{sup 2} and the Blatt-Weisskopf parameter r{sub BW} = 2.1{+-}0.5{+-}0.5 (GeV/c){sup -1} where the first uncertainty comes from statistics and the second from systematic uncertainties. We also measure the parameters defining the corresponding hadronic form factors at q{sup 2} = 0 (r{sub V} = V(0)/A{sub 1}(0) = 1.463{+-}0.017{+-}0.031, r{sup 2} = A{sub 2}(0)/A{sub 1}(0) = 0.801{+-}0.020{+-}0.020) and the value of the axial-vector pole mass parameterizing the q{sup 2} variation of A{sub 1} and A{sub 2}: m{sub A} = (2.63{+-}0.10{+-}0.13) GeV/c{sup 2}. The S-wave fraction is equal to (5.79{+-}0.16{+-}0.15)%. Other signal components correspond to fractions below 1%. Using the D{sup +} {yields} K{sup -}{pi}{sup +}{pi}{sup +} channel as a normalization, we measure the D{sup +} semileptonic branching fraction: {Beta}(D{sup +} {yields} K{sup -}{pi}{sup +}e{sup +}{nu}{sub e}) = (4.00 {+-} 0.03 {+-} 0.04 {+-} 0.09) …
Date: August 12, 2011
Creator: del Amo Sanchez, P.; Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J. et al.
Object Type: Article
System: The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 91, No. 158, Ed. 1 Friday, August 12, 2011 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 91, No. 158, Ed. 1 Friday, August 12, 2011

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: August 12, 2011
Creator: Gray, Janie
Object Type: Newspaper
System: The Portal to Texas History

Community-Driven Approaches to Digital Preservation

This presentation discusses community-driven approaches to digital preservation. The authors state the importance of collaboration and who is collaborating and how. In addition, information on some core principles of collaborative preservation and what these look like in practice.
Date: August 12, 2011
Creator: Halbert, Martin & Skinner, Katherine
Object Type: Presentation
System: The UNT Digital Library
Constrained Sypersymmetric Flipped SU (5) GUT Phenomenology (open access)

Constrained Sypersymmetric Flipped SU (5) GUT Phenomenology

We explore the phenomenology of the minimal supersymmetric flipped SU(5) GUT model (CFSU(5)), whose soft supersymmetry-breaking (SSB) mass parameters are constrained to be universal at some input scale, Min, above the GUT scale, M{sub GUT}. We analyze the parameter space of CFSU(5) assuming that the lightest supersymmetric particle (LSP) provides the cosmological cold dark matter, paying careful attention to the matching of parameters at the GUT scale. We first display some specific examples of the evolutions of the SSB parameters that exhibit some generic features. Specifically, we note that the relationship between the masses of the lightest neutralino {chi} and the lighter stau {tilde {tau}}{sub 1} is sensitive to M{sub in}, as is the relationship between m{sub {chi}} and the masses of the heavier Higgs bosons A,H. For these reasons, prominent features in generic (m{sub 1/2}, m{sub 0}) planes such as coannihilation strips and rapid-annihilation funnels are also sensitive to Min, as we illustrate for several cases with tan {beta} = 10 and 55. However, these features do not necessarily disappear at large Min, unlike the case in the minimal conventional SU(5) GUT. Our results are relatively insensitive to neutrino masses.
Date: August 12, 2011
Creator: Ellis, John; London, /CERN /King's Coll.; Mustafayev, Azar; /Minnesota U., Theor. Phys. Inst.; Olive, Keith A. & /Minnesota U., Theor. Phys. Inst. /Minnesota U. /Stanford U., Phys. Dept. /SLAC
Object Type: Article
System: The UNT Digital Library
Criticality and Transmission of Information in a Swarm of Cooperative Units (open access)

Criticality and Transmission of Information in a Swarm of Cooperative Units

Article discussing the criticality and transmission of information in a swarm of cooperative units.
Date: August 12, 2011
Creator: Vanni, Fabio; Lukovic, Mirko & Grigolini, Paolo
Object Type: Article
System: The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 28, No. 13, Ed. 1 Friday, August 12, 2011 (open access)

Dallas Voice (Dallas, Tex.), Vol. 28, No. 13, Ed. 1 Friday, August 12, 2011

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: August 12, 2011
Creator: Nash, Tammye
Object Type: Newspaper
System: The UNT Digital Library
Deconfinement in Yang-Mills Theory through Toroidal Compactification (open access)

Deconfinement in Yang-Mills Theory through Toroidal Compactification

We introduce field theory techniques through which the deconfinement transition of four-dimensional Yang-Mills theory can be moved to a semi-classical domain where it becomes calculable using two-dimensional field theory. We achieve this through a double-trace deformation of toroidally compactified Yang-Mills theory on R{sup 2} x S{sub L}{sup 1} x S{sub {beta}}{sup 1}. At large N, fixed-L, and arbitrary {beta}, the thermodynamics of the deformed theory is equivalent to that of ordinary Yang-Mills theory at leading order in the large N expansion. At fixed-N, small L and a range of {beta}, the deformed theory maps to a two-dimensional theory with electric and magnetic (order and disorder) perturbations, analogs of which appear in planar spin-systems and statistical physics. We show that in this regime the deconfinement transition is driven by the competition between electric and magnetic perturbations in this two-dimensional theory. This appears to support the scenario proposed by Liao and Shuryak regarding the magnetic component of the quark-gluon plasma at RHIC.
Date: August 12, 2011
Creator: Simic, Dusan; Unsal, Mithat & /Stanford U., Phys. Dept. /SLAC
Object Type: Article
System: The UNT Digital Library
Derived Concentration Guideline Levels for Argonne National Laboratory's Building 310 Area. (open access)

Derived Concentration Guideline Levels for Argonne National Laboratory's Building 310 Area.

The derived concentration guideline level (DCGL) is the allowable residual radionuclide concentration that can remain in soil after remediation of the site without radiological restrictions on the use of the site. It is sometimes called the single radionuclide soil guideline or the soil cleanup criteria. This report documents the methodology, scenarios, and parameters used in the analysis to support establishing radionuclide DCGLs for Argonne National Laboratory's Building 310 area.
Date: August 12, 2011
Creator: Kamboj, S., Dr. & Yu, C ., Dr. (Environmental Science Division)
Object Type: Report
System: The UNT Digital Library
Direct Imaging of the Coexistence of Ferromagnetism and Superconductivity at the LaA1O3/SrTiO3 Interface (open access)

Direct Imaging of the Coexistence of Ferromagnetism and Superconductivity at the LaA1O3/SrTiO3 Interface

LaAlO{sub 3} and SrTiO{sub 3} are insulating, nonmagnetic oxides, yet the interface between them exhibits a two-dimensional electron system with high electron mobility, superconductivity at low temperatures, and electric-field-tuned metal-insulator and superconductor-insulator phase transitions. Bulk magnetization and magnetoresistance measurements also suggest some form of magnetism depending on preparation conditions and suggest a tendency towards nanoscale electronic phase separation. Here we use local imaging of the magnetization and magnetic susceptibility to directly observe a landscape of ferromagnetism, paramagnetism, and superconductivity. We find submicron patches of ferromagnetism in a uniform background of paramagnetism, with a nonuniform, weak diamagnetic superconducting susceptibility at low temperature. These results demonstrate the existence of nanoscale phase separation as suggested by theoretical predictions based on nearly degenerate interface subbands associated with the Ti orbitals. The magnitude and temperature dependence of the paramagnetic response suggests that the vast majority of the electrons at the interface are localized, and do not contribute to transport measurements. In addition to the implications for magnetism, the existence of a 2D superconductor at an interface with highly broken inversion symmetry and a ferromagnetic landscape in the background suggests the potential for exotic superconducting phenomena.
Date: August 12, 2011
Creator: Bert, Julie
Object Type: Article
System: The UNT Digital Library
Dispersion in the Presence of Strong Transverse Wakefields (open access)

Dispersion in the Presence of Strong Transverse Wakefields

To minimize emittance growth in a long linac, it is necessary to control the wakefields by correcting the beam orbit excursions. In addition, the particle energy is made to vary along the length of the bunch to introduce a damping, known as the BNS damping, to the beam break-up effect. In this paper, we use a two-particle model to examine the relative magnitudes of the various orbit and dispersion functions involved. The results are applied to calculate the effect of a closed orbit bump and a misaligned structure. It is shown that wake-induced dispersion is an important contribution to the beam dynamics in long linacs with strong wakefields like SLC.
Date: August 12, 2011
Creator: Assmann, Ralph & Chao, Alex
Object Type: Article
System: The UNT Digital Library
Dispute Settlement Under the U.S.-Peru Trade Promotion Agreement: An Overview (open access)

Dispute Settlement Under the U.S.-Peru Trade Promotion Agreement: An Overview

None
Date: August 12, 2011
Creator: Grimmett, Jeanne J.
Object Type: Report
System: The UNT Digital Library
An effect of the networks of the subgrain boundaries on spectral responses of thick CdZnTe detectors (open access)

An effect of the networks of the subgrain boundaries on spectral responses of thick CdZnTe detectors

CdZnTe (CZT) crystals used for nuclear-radiation detectors often contain high concentrations of subgrain boundaries and networks of poligonized dislocations that can significantly degrade the performance of semiconductor devices. These defects exist in all commercial CZT materials, regardless of their growth techniques and their vendor. We describe our new results from examining such detectors using IR transmission microscopy and white X-ray beam diffraction topography. We emphasize the roles on the devices performances of networks of subgrain boundaries with low dislocation densities, such as poligonized dislocations and mosaic structures. Specifically, we evaluated their effects on the gamma-ray responses of thick, >10 mm, CZT detectors. Our findings set the lower limit on the energy resolution of CZT detectors containing dense networks of subgrain boundaries, and walls of dislocations.
Date: August 12, 2011
Creator: Bolotnikov, A.; Butcher, J.; Camarda, G.; Cui, Y.; Egarievwe, S.; Fochuk, P. et al.
Object Type: Article
System: The UNT Digital Library
Evidence for the h_b(1P) meson in the decay Upsilon(3S) --> pi0 h_b(1P) (open access)

Evidence for the h_b(1P) meson in the decay Upsilon(3S) --> pi0 h_b(1P)

Using a sample of 122 million {Upsilon}(3S) events recorded with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC, we search for the h{sub b}(1P) spin-singlet partner of the P-wave {chi}{sub b}(1P) states in the sequential decay {Upsilon}(3S) {yields} {pi}{sup 0}h{sub b}(1P), h{sub b}(1P) {yields} {gamma}{eta}{sub b}(1S). We observe an excess of events above background in the distribution of the recoil mass against the {pi}{sup 0} at mass 9902 {+-} 4(stat.) {+-} 1(syst.) MeV/c{sup 2}. The width of the observed signal is consistent with experimental resolution, and its significance is 3.0 {sigma}, including systematic uncertainties. We obtain the value (3.7 {+-} 1.1 (stat.) {+-} 0.7 (syst.)) x 10{sup -4} for the product branching fraction {Beta}({Upsilon}(3S) {yields} {pi}{sup 0}h{sub b}) x {Beta}(h{sub b} {yields} {gamma}{eta}{sub b}).
Date: August 12, 2011
Creator: Lees, J. P.
Object Type: Article
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, August 12, 2011 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Friday, August 12, 2011

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: August 12, 2011
Creator: DeSilver, Debi
Object Type: Newspaper
System: The Gateway to Oklahoma History
Federal Register, Volume 76, Number 156, August 12, 2011, Pages 50111-50402 (open access)

Federal Register, Volume 76, Number 156, August 12, 2011, Pages 50111-50402

Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date: August 12, 2011
Creator: United States. Office of the Federal Register.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Federal Research and Development Funding: FY2011 (open access)

Federal Research and Development Funding: FY2011

None
Date: August 12, 2011
Creator: Sargent, John F., Jr.
Object Type: Report
System: The UNT Digital Library
The First Galaxies: Chemical Enrichment, Mixing, and Star Formation (open access)

The First Galaxies: Chemical Enrichment, Mixing, and Star Formation

None
Date: August 12, 2011
Creator: Greif, Thomas H.; /Garching, Max Planck Inst. Plasmaphys.; Glover, Simon C.O.; U., /Heidelberg; Bromm, Volker; /Texas U., Astron. Dept. et al.
Object Type: Article
System: The UNT Digital Library
Foreign Operations Appropriations: General Provisions (open access)

Foreign Operations Appropriations: General Provisions

This report identifies the legislative origins of General Provisions that pertain to foreign aid in the current Department of State, Foreign Operations, and Related Programs Appropriations Act.
Date: August 12, 2011
Creator: Rennack, Dianne E.; Mages, Lisa & Chesser, Susan G.
Object Type: Report
System: The UNT Digital Library
Gauge/Gravity Duality and Strongly Coupled Light-Front Dynamics (open access)

Gauge/Gravity Duality and Strongly Coupled Light-Front Dynamics

We find a correspondence between semiclassical gauge theories quantized on the light-front and a dual gravity model in anti-de Sitter (AdS) space, thus providing an initial approximation to QCD in its strongly coupled regime. This correspondence - light-front holography - leads to a light-front Hamiltonian and relativistic bound-state wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. Light-front holography also allows a precise mapping of transition amplitudes from AdS to physical space-time. In contrast with the usual AdS/QCD framework, the internal structure of hadrons is explicitly introduced in the gauge/gravity correspondence and the angular momentum of the constituents plays a key role. We also discuss how to introduce higher Fock-states in the correspondence as well as their relevance for describing the detailed structure of space and time-like form factors.
Date: August 12, 2011
Creator: de Teramond, Guy F.; U., /Costa Rica; Brodsky, Stanley J. & /SLAC /Southern Denmark U., CP3-Origins
Object Type: Article
System: The UNT Digital Library
GLAST (FERMI) Data-Processing Pipeline (open access)

GLAST (FERMI) Data-Processing Pipeline

The Data Processing Pipeline ('Pipeline') has been developed for the Gamma-Ray Large Area Space Telescope (GLAST) which launched June 11, 2008. It generically processes graphs of dependent tasks, maintaining a full record of its state, history and data products. The Pipeline is used to automatically process the data down-linked from the satellite and to deliver science products to the GLAST collaboration and the Science Support Center and has been in continuous use since launch with great success. The pipeline handles up to 2000 concurrent jobs and in reconstructing science data produces approximately 750GB of data products using 1/2 CPU-year of processing time per day.
Date: August 12, 2011
Creator: Flath, Daniel L.; Johnson, Tony S.; Turri, Massimiliano & Heidenreich, Karen A.
Object Type: Article
System: The UNT Digital Library