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Challenges and opportunities in high-precision Be-10 measurements at CAMS (open access)

Challenges and opportunities in high-precision Be-10 measurements at CAMS

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Date: October 12, 2009
Creator: Rood, D. H.; Hall, S.; Guilderson, T. P.; Finkel, R. C. & Brown, T. A.
Object Type: Article
System: The UNT Digital Library
On-demand Overlay Networks for Large Scientific Data Transfers (open access)

On-demand Overlay Networks for Large Scientific Data Transfers

Large scale scientific data transfers are central to scientific processes. Data from large experimental facilities have to be moved to local institutions for analysis or often data needs to be moved between local clusters and large supercomputing centers. In this paper, we propose and evaluate a network overlay architecture to enable highthroughput, on-demand, coordinated data transfers over wide-area networks. Our work leverages Phoebus and On-demand Secure Circuits and AdvanceReservation System (OSCARS) to provide high performance wide-area network connections. OSCARS enables dynamic provisioning of network paths with guaranteed bandwidth and Phoebus enables the coordination and effective utilization of the OSCARS network paths. Our evaluation shows that this approach leads to improved end-to-end data transfer throughput with minimal overheads. The achievedthroughput using our overlay was limited only by the ability of the end hosts to sink the data.
Date: October 12, 2009
Creator: Ramakrishnan, Lavanya; Guok, Chin; Jackson, Keith; Kissel, Ezra; Swany, D. Martin & Agarwal, Deborah
Object Type: Article
System: The UNT Digital Library
[Dallas, San Antonio Newspaper Interns Honored by Texas Daily Newspaper Association] (open access)

[Dallas, San Antonio Newspaper Interns Honored by Texas Daily Newspaper Association]

Texas Daily Newspaper Associations' honored student newspaper interns who have worked with The Dallas Morning News and the San Antonio Express-News. The students have been awarded the 2008 H.M. Fentress Award. The award winenrs are Marjorie Korn of the Morning News and Jamie Klein of the Express-News. The remaining document details the work that the students have done during their internship.
Date: October 12, 2009
Creator: Texas Daily Newspaper Association
Object Type: Text
System: The UNT Digital Library
Modeling Windows in Energy Plus with Simple Performance Indices (open access)

Modeling Windows in Energy Plus with Simple Performance Indices

The building energy simulation program, Energy Plus (E+), cannot use standard window performance indices (U, SHGC, VT) to model window energy impacts. Rather, E+ uses more accurate methods which require a physical description of the window. E+ needs to be able to accept U and SHGC indices as window descriptors because, often, these are all that is known about a window and because building codes, standards, and voluntary programs are developed using these terms. This paper outlines a procedure, developed for E+, which will allow it to use standard window performance indices to model window energy impacts. In this 'Block' model, a given U, SHGC, VT are mapped to the properties of a fictitious 'layer' in E+. For thermal conductance calculations, the 'Block' functions as a single solid layer. For solar optical calculations, the model begins by defining a solar transmittance (Ts) at normal incidence based on the SHGC. For properties at non-normal incidence angles, the 'Block' takes on the angular properties of multiple glazing layers; the number and type of layers defined by the U and SHGC. While this procedure is specific to E+, parts of it may have applicability to other window/building simulation programs.
Date: October 12, 2009
Creator: Arasteh, Dariush; Kohler, Christian & Griffith, Brent
Object Type: Report
System: The UNT Digital Library
Using an IIDC/DCAM camera for beam display and analysis (open access)

Using an IIDC/DCAM camera for beam display and analysis

An IIDC/DCAM camera is used to the RHIC beams as they pass through a hydrogen jet. The data is transferred over a 1394 bus to a computer with a Linux operating system. A software process on that computer collects the individual frames and packages them into parameters within the RHIC control system's framework. This information is packaged to continuously update two primary types of clients: One type is responsible for near-real-time display of the images; useful in comfort displays, etc. The second is responsible for collecting data used in analysis of beam dynamics and properties like luminosity.
Date: October 12, 2009
Creator: Olsen,R.H.; Gassner, D. & Hoff, L. T.
Object Type: Article
System: The UNT Digital Library
Trials, tribulations, and pitfalls using commercial instruments for data acquisition (open access)

Trials, tribulations, and pitfalls using commercial instruments for data acquisition

Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC) uses many commercially available instruments - for example spectrum analyzers, oscilloscopes, digital volt meters, signal generators - as integral parts of instrumentation and control systems. Typically these systems are remotely controlled. Using commercial instruments has many benefits. Manufactures have the skill, knowledge, and experience to produce high quality products. The price performance ratio is hard to duplicate. There are also disadvantages. Proprietary interfaces, single platform drivers, and reliable operation provide challenges for implementation and unattended operation. Several of the systems used at RHIC will be described. Their issues and solutions will be presented.
Date: October 12, 2009
Creator: Lee,R.C.; Olsen, R. H. & Unger, K. L.
Object Type: Article
System: The UNT Digital Library
High-Energy Physics Outstanding Junior Investigating Program (open access)

High-Energy Physics Outstanding Junior Investigating Program

Throughout the past five years I have worked to uncover what physics lies beyond that of the standard model. My main focus in the first two and a half years has been to understand physics at the electroweak scale, and to a lesser extent understand the relationship between particle physics and cosmology. My final two and a half years was spent on studying the feasibility of discovering “non-standard” models of electroweak physics at hadron colliders, working in close contact with experimentalists at the Tevatron and the LHC. My biggest successes during this period has been both in electroweak physics – expanding our understanding of the Higgs sector in supersymmetric theories and ultraviolet completions of little Higgs theories – and in collider physics – discovering a method for identifying high momentum top quarks and realizing the potential for LHCb to discover some versions of supersymmetry. I have also made some progress towards a particle physics/effective field theory solution of the cosmological constant problem.
Date: October 12, 2009
Creator: Kaplan, David, E.
Object Type: Report
System: The UNT Digital Library
Monitoring applications once they are in the user community (open access)

Monitoring applications once they are in the user community

Once an application is released into the user community, obtaining prompt and high quality information on application usage, applicability and reliability can be a challenge. Most Linux and Solaris applications used at RHIC and associated accelerators have been instrumented so that application and crash information is gathered, stored and forwarded to the appropriate developer for immediate analysis. To support this process, databases were created to track developer and application information. In order to keep these databases relevant, a web based application release procedure was created to collect information and automatically update the database. Additional capabilities have been developed that utilize and expand on the various components of this system to promote communication between developers and users, and to monitor applications. An application feedback feature allows users to instantly communicate with application developers. An application history system records application usage and reliability.
Date: October 12, 2009
Creator: Binello, S.
Object Type: Article
System: The UNT Digital Library
Quantification of Absorption, Retention and Elimination of Two Different Oral Doses of Vitamin a in Zambian Boys Using Accelerator Mass Spectrometry (open access)

Quantification of Absorption, Retention and Elimination of Two Different Oral Doses of Vitamin a in Zambian Boys Using Accelerator Mass Spectrometry

A recent survey indicated that high-dose vitamin A supplements (HD-VAS) had no apparent effect on vitamin A (VA) status of Zambian children <5 y of age. To explore possible reasons for the lack of response to HD-VAS among Zambian children, we quantified the absorption, retention, and urinary elimination of either a single HDVAS (60 mg) or a smaller dose of stable isotope (SI)-labeled VA (5 mg), which was used to estimate VA pool size, in 3-4 y old Zambian boys (n = 4 for each VA dose). A 25 nCi tracer dose of [{sup 14}C{sub 2}]-labeled VA was co-administered with the HD-VAS or SI-labeled VA, and 24-hr stool and urine samples were collected for 3 and 7 consecutive days, respectively, and 24-hr urine samples at 4 later time points. Accelerator Mass Spectrometry (AMS) was used to measure the cumulative excretion of {sup 14}C in stool and urine 3d after dosing to estimate, respectively, absorption and retention of the VAS and SI-labeled VA. The urinary elimination rate (UER) was estimated by plotting {sup 14}C in urine vs. time, and fitting an exponential equation to the data. Estimates of mean absorption, retention and the UER were 83.8 {+-} 7.1%, 76.3 {+-} 6.7%, …
Date: October 12, 2009
Creator: Aklamati, E. K.; Mulenga, M.; Dueker, S. R.; Buchholz, B. A.; Peerson, J. M.; Kafwembe, E. et al.
Object Type: Article
System: The UNT Digital Library
Proteomic Profiling of Mesenchymal Stem Cell Responses to Mechanical Strain and TGF-B1 (open access)

Proteomic Profiling of Mesenchymal Stem Cell Responses to Mechanical Strain and TGF-B1

Mesenchymal stem cells (MSCs) are a potential source of smooth muscle cells (SMCs) for constructing tissue-engineered vascular grafts. However, the details of how specific combinations of vascular microenvironmental factors regulate MSCs are not well understood. Previous studies have suggested that both mechanical stimulation with uniaxial cyclic strain and chemical stimulation with transforming growth factor {beta}1 (TGF-{beta}1) can induce smooth muscle markers in MSCs. In this study, we investigated the combined effects of uniaxial cyclic strain and TGF-{beta}1 stimulation on MSCs. By using a proteomic analysis, we found differential regulation of several proteins and genes, such as the up-regulation of TGF-{beta}1-induced protein ig-h3 (BGH3) protein levels by TGF-{beta}1 and up-regulation of calponin 3 protein level by cyclic strain. At the gene expression level, BGH3 was induced by TGF-{beta}1, but calponin 3 was not significantly regulated by mechanical strain or TGF-{beta}1, which was in contrast to the synergistic up-regulation of calponin 1 gene expression by cyclic strain and TGF-{beta}1. Further experiments with cycloheximide treatment suggested that the up-regulation of calponin 3 by cyclic strain was at post-transcriptional level. The results in this study suggest that both mechanical stimulation and TGF-{beta}1 signaling play unique and important roles in the regulation of MSCs at …
Date: October 12, 2009
Creator: Kurpinski, Kyle; Chu, Julia; Wang, Daojing & Li, Song
Object Type: Report
System: The UNT Digital Library
Letter of Intent to Build a MiniBooNE Near Detector:BooNE (open access)

Letter of Intent to Build a MiniBooNE Near Detector:BooNE

There is accumulating evidence for a difference between neutrino and antineutrino oscillations at the {approx}1 eV{sup 2} scale. The MiniBooNE experiment observes an unexplained excess of electron-like events at low energies in neutrino mode, which may be due, for example, to either a neutral current radiative interaction, sterile neutrino decay, or to neutrino oscillations involving sterile neutrinos and which may be related to the LSND signal. No excess of electron-like events (-0.5 {+-} 7.8 {+-} 8.7), however, is observed so far at low energies in antineutrino mode. Furthermore, global 3+1 and 3+2 sterile neutrino fits to the world neutrino and antineutrino data suggest a difference between neutrinos and antineutrinos with significant (sin{sup 2} 2{theta}{sub {mu}{mu}} {approx} 35%) {bar {nu}}{sub {mu}} disappearance. In order to test whether the low-energy excess is due to neutrino oscillations and whether there is a difference between {nu}{sub {mu}} and {bar {nu}}{sub {mu}} disappearance, we propose building a second MiniBooNE detector at (or moving the existing MiniBooNE detector to) a distance of {approx}200 m from the Booster Neutrino Beam (BNB) production target. With identical detectors at different distances, most of the systematic errors will cancel when taking a ratio of events in the two detectors, as …
Date: October 12, 2009
Creator: Stancu, I.; Djurcic, Z.; Smith, D.; Ford, R.; Kobilarcik, T.; Marsh, W. et al.
Object Type: Report
System: The UNT Digital Library
Excited Spectator Electron Effects on Spectral Line Shapes (open access)

Excited Spectator Electron Effects on Spectral Line Shapes

Excited spectator electron effects on Stark broadened spectral line shapes of transitions involving tightly bound electrons are investigated. It is shown that the interference terms in the electron impact broadening are essential to describe the overlapping lines generated by these configurations (e.g.; dielectronic satellite lines). The main impact is narrower spectral features and reduced far wing intensities compared to calculations neglecting the interference terms.
Date: October 12, 2009
Creator: Iglesias, C A
Object Type: Article
System: The UNT Digital Library
Impacts of Standard 90.1-2007 for Commercial Buildings at State Level (open access)

Impacts of Standard 90.1-2007 for Commercial Buildings at State Level

This report examines the requirements of Standard 90.1-2007 on commercial buildings on a state-by-state basis with a separate, stand-alone chapter for each state. Standard 90.1-2007 is compared to the current state code for most states. This is the final version of the draft previously cleared and assigned ERICA # PNNL-18544, titled "Commercial Nationwide Report."
Date: October 12, 2009
Creator: Bartlett, Rosemarie; Halverson, Mark A. & Gowri, Krishnan
Object Type: Report
System: The UNT Digital Library
Thermal Wadis in Support of Lunar Exploration: Concept Development and Utilization (open access)

Thermal Wadis in Support of Lunar Exploration: Concept Development and Utilization

Thermal wadis, engineered sources of heat, can be used to extend the life of lunar rovers by keeping them warm during the extreme cold of the lunar night. Thermal wadis can be manufactured by sintering or melting lunar regolith into a solid mass with more than two orders of magnitude higher thermal diffusivities compared to native regolith dust. Small simulant samples were sintered and melted in the electrical furnaces at different temperatures, different heating and cooling rates, various soaking times, under air, or in an argon atmosphere. The samples were analyzed with scanning electron microscopy and energy dispersive spectroscopy, X-ray diffraction, a laser-flash thermal diffusivity system, and the millimeter-wave system. The melting temperature of JSC-1AF simulant was ~50°C lower in an Ar atmosphere compared to an air atmosphere. The flow of Ar during sintering and melting resulted in a small mass loss of 0.04 to 0.1 wt% because of the volatization of alkali compounds. In contrast, the samples that were heat-treated under an air atmosphere gained from 0.012 to 0.31 wt% of the total weight. A significantly higher number of cavities were formed inside the samples melted under an argon atmosphere, possibly because of the evolution of oxygen bubbles from …
Date: October 12, 2009
Creator: Matyas, Josef; Wegeng, Robert S. & Burgess, Jeremy M.
Object Type: Report
System: The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 95, No. 21, Ed. 1 Monday, October 12, 2009 (open access)

Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 95, No. 21, Ed. 1 Monday, October 12, 2009

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date: October 12, 2009
Creator: Shance, Brenda
Object Type: Newspaper
System: The Gateway to Oklahoma History
Sweetwater Reporter (Sweetwater, Tex.), Vol. 111, No. 280, Ed. 1 Monday, October 12, 2009 (open access)

Sweetwater Reporter (Sweetwater, Tex.), Vol. 111, No. 280, Ed. 1 Monday, October 12, 2009

Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date: October 12, 2009
Creator: Rodriguez, Tatiana
Object Type: Newspaper
System: The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 95, No. 38, Ed. 1 Monday, October 12, 2009 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 95, No. 38, Ed. 1 Monday, October 12, 2009

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date: October 12, 2009
Creator: Hughes, Jamie
Object Type: Newspaper
System: The Gateway to Oklahoma History
["Three Gentlemen of Gospel" tribute concert tape 1 of 3] captions transcript

["Three Gentlemen of Gospel" tribute concert tape 1 of 3]

Video recording from The Black Academy of Arts and Letters recorded during the "Three Gentlemen of Gospel" concert tribute to Rance Allen, Daryl Coley, and Walter Hawkins held on October 12th, 2009 on the Naomi Bruton main stage. The footage shows a live performance of gospel music by a large choir and various featured individuals such as dancers and directors. The featured guests include Vanessa Bell Armstrong and Kervy Brown.
Date: October 12, 2009
Creator: King, Curtis
Object Type: Video
System: The UNT Digital Library
["Three Gentlemen of Gospel" tribute concert tape 2 of 3] captions transcript

["Three Gentlemen of Gospel" tribute concert tape 2 of 3]

Video recording from The Black Academy of Arts and Letters recorded during the "Three Gentlemen of Gospel" concert held in tribute of Rance Allen, Daryl Coley, and Walter Hawkins held on October 12th, 2009 on the Naomi Bruton main stage. The footage shows a live performance of gospel music by a large choir and various featured individuals such as dancers and directors. The featured guests include Vanessa Bell Armstrong and Kervy Brown.
Date: October 12, 2009
Creator: King, Curtis
Object Type: Video
System: The UNT Digital Library
["Three Gentlemen of Gospel" tribute concert tape 3 of 3] captions transcript

["Three Gentlemen of Gospel" tribute concert tape 3 of 3]

Video recording from The Black Academy of Arts and Letters recorded during the "Three Gentlemen of Gospel" concert held in tribute to Rance Allen, Daryl Coley, and Walter Hawkins held on October 12th, 2009 on the Naomi Bruton main stage. The footage shows a live performance of gospel music by a large choir and various featured individuals such as dancers and directors. The featured guests include Vanessa Bell Armstrong and Kervy Brown.
Date: October 12, 2009
Creator: King, Curtis
Object Type: Video
System: The UNT Digital Library