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open access

Adaptively Improving Long Distance Network Transfers With Logistics

Description: Long distance data movement is an essential activity of modern computing. However, the congestion control mechanisms in the Internet’s Transmission Control Protocol (TCP) severely limit the bandwidth achieved by long distance data transfers. The throughput of such transfers can be improved by applying the logistical technique of breaking a single long distance transfer into multiple shorter transfers. This technique can result in signifi cantly improved throughput while still respecting the sha… more
Date: January 1, 2007
Creator: LaBissoniere, David & Roche, Kenneth
Partner: UNT Libraries Government Documents Department
open access

Air Leakage of U.S. Homes: Model Prediction

Description: Air tightness is an important property of building envelopes. It is a key factor in determining infiltration and related wall-performance properties such as indoor air quality, maintainability and moisture balance. Air leakage in U.S. houses consumes roughly 1/3 of the HVAC energy but provides most of the ventilation used to control IAQ. The Lawrence Berkeley National Laboratory has been gathering residential air leakage data from many sources and now has a database of more than 100,000 raw mea… more
Date: January 1, 2007
Creator: Sherman, Max H. & McWilliams, Jennifer A.
Partner: UNT Libraries Government Documents Department
open access

Analysis of the Water-Splitting Capabilities of Gallium Indium Phosphide Nitride (GaInPN)

Description: With increasing demand for oil, the fossil fuels used to power society’s vehicles and homes are becoming harder to obtain, creating pollution problems and posing hazard’s to people’s health. Hydrogen, a clean and effi cient energy carrier, is one alternative to fossil fuels. Certain semiconductors are able to harness the energy of solar photons and direct it into water electrolysis in a process known as photoelectrochemical water-splitting. P-type gallium indium phosphide (p-GaInP2) in tandem w… more
Date: January 1, 2007
Creator: Head, J. & Turner, J.
Partner: UNT Libraries Government Documents Department
open access

Asupra structurii grupurilor abeliene finite

Description: Article presenting a direct elementary proof to a classical result regarding the structure of finite abelian groups as products of descending cyclic groups.
Date: 2007
Creator: Anghel, Nicolae
Partner: UNT College of Arts and Sciences
open access

The Autecology of the Fío-Fío (Elaenia Albiceps Lafresnaye and D'Orbigny) in Subantarctic Forests of the Cape Horn Biosphere Reserve, Chile

Description: Article discussing research on the autecology of the fío-fío (Elaenia albiceps Lafresnaye and D'Orbigny) in subantarctic forests of the Cape Horn Biosphere Reserve, Chile.
Date: 2007
Creator: Brown, Clare E.; Anderson, Christopher B.; Ippi, Silvina; Sherriffs, Margaret; Charlin, Rina; McGehee, Steven M. et al.
Partner: UNT College of Arts and Sciences
open access

Berkeley UXO Discriminator (BUD)

Description: The Berkeley UXO Discriminator (BUD) is an optimally designed active electromagnetic system that not only detects but also characterizes UXO. The system incorporates three orthogonal transmitters and eight pairs of differenced receivers. it has two modes of operation: (1) search mode, in which BUD moves along a profile and exclusively detects targets in its vicinity, providing target depth and horizontal location, and (2) discrimination mode, in which BUD, stationary above a target, from a sing… more
Date: January 1, 2007
Creator: Gasperikova, Erika; Smith, J. Torquil; Morrison, H. Frank & Becker, Alex
Partner: UNT Libraries Government Documents Department
open access

Calculation of Particle Bounce and Transit Times on General Geometry Flux Surfaces

Description: A viable nuclear fusion reactor must confi ne energetic plasmas long enough so that the fusion energy produced exceeds the energy consumed to heat the plasma and maintain confi nement. It is well-known that magnetohydrodynamic (MHD) or plasma fl uid instabilities limit confi nement. One such important instability is the resistive wall mode (RWM). Plasma rotation faster than a critical frequency has been observed to stabilize the RWM. Some theories predict that the critical frequency will vary i… more
Date: January 1, 2007
Creator: Swanson, D. & Menard, J.
Partner: UNT Libraries Government Documents Department
open access

CFD-based Modeling of Inflight Mercury Capture

Description: A numerical model of sorbent injection and in-flight mercury capture is presented. There are few existing models of mercury capture, and these typically make gross assumptions of plug gas flow, no velocity slip between particle and gas phase, and uniform sorbent dispersion. All of these assumptions are overcome with the current model, which combines the physics of mass transfer at the microscopic sorbent scale with macroscopic flow conditions provided via Computational Fluid Dynamics (CFD) simu… more
Date: January 1, 2007
Creator: Madsen, J. I. & O'Brien, T. J.
Partner: UNT Libraries Government Documents Department
open access

Characterizing the Role of the NELL1 Gene in Cardiovascular Development

Description: Nell1{sup 6R} is a chemically-induced point mutation in a novel cell-signaling gene, Nell1, which results in truncation of the protein and degradation of the Nell16R transcript. Earlier studies revealed that loss of Nell1 function reduces expression of numerous extracellular matrix (ECM) proteins required for differentiation of bone and cartilage precursor cells, thereby causing severe skull and spinal defects. Since skeletal and cardiovascular development are closely linked biological processe… more
Date: January 1, 2007
Creator: Liu, L. Y. & Culiat, C.
Partner: UNT Libraries Government Documents Department
open access

Charge-separated atmospheric neutrino-induced muons in the MINOS far detector

Description: We found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector, which has an acceptance for neutrino-induced muons of 6.91 x 10{sup 6} cm{sup 2} sr. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low momentum muons to the sum of the number of high momentum and unknown momentum muons for both data and Monte Carlo expectation in the absence of neutrino oscillations. The ratio of data and Monte Carlo ratios, R, is R = 0.… more
Date: January 1, 2007
Creator: Adamson, P.; London, /Fermilab /University Coll.; Andreopoulos, Constantinos V.; /Rutherford; Arms, Kregg E.; U., /Minnesota et al.
Partner: UNT Libraries Government Documents Department
open access

Chemical and magnetic interface properties of tunnel junctionswith co2mnsi/co2fesi multilayer electrode showing large tunnelingmagnetoresistance

Description: Transport, as well as chemical and magnetic interface properties of two kinds of magnetic tunnel junctions (MTJs) with Co{sub 2}FeSi electrode, Al-O barrier, and Co-Fe counter electrode, are investigated. For junctions with Co{sub 2}FeSi single-layer electrodes, a tunnel magnetoresistance of up to 52% is found after optimal annealing for an optimal Al thickness of 1.5 nm, whereas the room temperature bulk magnetization of the Co{sub 2}FeSi film reaches only 75% of the expected value. By using a… more
Date: January 1, 2007
Creator: Schmalhorst, J.; Ebke, D.; Sacher, M.D.; Liu, N.; Thomas, A.; Reiss, G. et al.
Partner: UNT Libraries Government Documents Department
open access

Climate Change Effects on Species Composition Mediates Decomposition in an Old-Field Ecosystem

Description: Decomposition of leaf litter collected from an old-fi eld community grown under a combination of elevated atmospheric CO2 concentrations (+300ppm) and elevated surface temperature (+ 3.2°C) was examined in ambient conditions over 8 months in two separate experiments. In the fi rst experiment, we examined the main effects and interactions of CO2 and warming on litter quality and subsequent mass loss rates. Multi-species litter bags were constructed with litter collected from chambers with ambien… more
Date: January 1, 2007
Creator: Tyner, M.L. & Classen, A.T.
Partner: UNT Libraries Government Documents Department
open access

CMS validation experience: Test-beam 2004 data vs GEANT4

Description: A comparison between the Geant4 Monte-Carlo simulation of CMS Detector's Calorimetric System and data from the 2004 Test-Beam at CERN's SPS H2 beam-line is presented. The overall simulated response agrees quite well with the measured response. Slight differences in the longitudinal shower profiles between the MC predictions made with different Physics Lists are observed.
Date: January 1, 2007
Creator: Piperov, Stefan & /Fermilab /Sofiya, Inst. Nucl. Res.
Partner: UNT Libraries Government Documents Department
open access

Coherent neutrino-nucleus scattering and the MINERvA experiment

Description: In this paper we describe the capabilities of the MINERvA experiment for the measurement of neutrino-nucleus coherent scattering.
Date: January 1, 2007
Creator: Gallagher, H.; U., /Tufts; Harris, Deborah & /Fermilab
Partner: UNT Libraries Government Documents Department
open access

A Comparison of DNA Damage Probes in Two HMEC Lines With X-Irradiation

Description: In this study, we investigated γH2AXser139 and 53BP1ser25, DNA damage pathway markers, to observe responses to radiation insult. Two Human Mammary Epithelial Cell (HMEC) lines were utilized to research the role of immortalization in DNA damage marker expression, HMEC HMT-3522 (S1) with an infi nite lifespan, and a subtype of HMEC 184 (184V) with a fi nite lifespan. Cells were irradiated with 50cGy X-rays, fi xed with 4% paraformaldehyde after 1 hour repair at 37°C, and processed through immunof… more
Date: January 1, 2007
Creator: Wisnewski, C. L.; Bjornstad, K. A.; Rosen, C. J.; Chang, P. Y. & Blakely, E. A.
Partner: UNT Libraries Government Documents Department
open access

Comparison of the Populations of Common Wood-Nymph Butterflies in Burned Prairie, Unburned Prairie and Old Field Grasses

Description: Common wood-nymph butterfl ies are found throughout the United States and Canada. However, not much is known about how they overwinter or their preferences for particular grasses and habitats. In this study, the impact of prairie management plans on the abundance of the wood-nymph population was assessed, as well as the preference of these butterfl ies for areas with native or non-native grasses. The abundance of common wood-nymph butterfl ies was determined using Pollard walks; more common woo… more
Date: January 1, 2007
Creator: Hahn, M. & Walton, R.
Partner: UNT Libraries Government Documents Department
open access

Cosmological neutrino mass detection: The Best probe of neutrino lifetime

Description: Future cosmological data may be sensitive to the effects of a finite sum of neutrino masses even as small as {approx}0.06 eV, the lower limit guaranteed by neutrino oscillation experiments. We show that a cosmological detection of neutrino mass at that level would improve by many orders of magnitude the existing limits on neutrino lifetime, and as a consequence on neutrino secret interactions with (quasi-)massless particles as in majoron models. On the other hand, neutrino decay may provide a w… more
Date: January 1, 2007
Creator: Serpico, Pasquale D.
Partner: UNT Libraries Government Documents Department
open access

The decay constants f(B) and f(D+) from three-flavor lattice QCD

Description: We present new preliminary results for the leptonic decay constants f{sub B} and f{sub D+} determined in 2+1 flavor lattice QCD at lattice spacings a = 0.09, 0.12 and 0.15 fm. Results are obtained using the MILC Collaboration gauge configuration ensembles, clover heavy quarks in the Fermilab interpretation and improved staggered light quarks. Decay constants, computed at partially quenched combinations of the valence and sea light quark masses, are used to determine the low-energy parameters of… more
Date: January 1, 2007
Creator: Bernard, C.; DeTar, C.; Di Pierro, M.; El-Khadra, A. X.; Evans, R. T.; Freeland, E. et al.
Partner: UNT Libraries Government Documents Department
open access

Design Considerations for Remote High-Speed Pressure Measurements of Dynamic Combustion Phenomena

Description: As gas turbine combustion systems evolve to achieve ultra-low emission targets, monitoring and controlling dynamic combustion processes becomes increasingly important. These dynamic processes may include flame extinction, combustion-driven instabilities, or other dynamic combustion phenomena. Pressure sensors can be incorporated into the combustor liner design, but this approach is complicated by the harsh operating environment. One practical solution involves locating the sensor in a more remo… more
Date: January 1, 2007
Creator: Straub, D.L.; Ferguson, D.H.; Rohrssen, Robert (West Virginia University, Morgantown, WV) & Perez, Eduardo (West Virginia University, Morgantown, WV)
Partner: UNT Libraries Government Documents Department
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