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The Rambler (Fort Worth, Tex.), Vol. 101, No. 5, Ed. 1 Wednesday, October 1, 2008
Weekly student newspaper from Texas Wesleyan University in Fort Worth, Texas that includes campus and local news along with advertising.
Date:
October 1, 2008
Creator:
Nugent, Tiara
Object Type:
Newspaper
System:
The Portal to Texas History
The Rambler (Fort Worth, Tex.), Vol. 101, No. 5, Ed. 1 Wednesday, October 1, 2008
Weekly student newspaper from Texas Wesleyan University in Fort Worth, Texas that includes campus and local news along with advertising.
Date:
October 1, 2008
Creator:
Garcia, Martin
Object Type:
Newspaper
System:
The Portal to Texas History
Real Time RF Simulator (RTS) and control
The multi-cavity RTS allows LLRF algorithm development and lab testing prior to commissioning with real cavities and cryomodules. The RTS is a valuable tool since it models the functions, errors and disturbances of real RF systems. The advantage of a RTS over an off-line simulator is that it can be implemented on the actual LLRF hardware, on the same FPGA and processor, and run at the same speed of the LLRF control loop. Additionally the RTS can be shared by collaborators who do not have access to RF systems or when the systems are not available to LLRF engineers. The RTS simulator incorporates hardware, firmware and software errors and limitations of a real implementation, which would be hard to identify and time consuming to model in off-line simulations.
Date:
October 1, 2008
Creator:
Cancelo, G.; Armiento, C.; Treptow, K.; Vignoni, A. & Zmuda, T.
Object Type:
Article
System:
The UNT Digital Library
Reliability of Current Biokinetic and Dosimetric Models for Radionuclides: A Pilot Study
This report describes the results of a pilot study of the reliability of the biokinetic and dosimetric models currently used by the U.S. Nuclear Regulatory Commission (NRC) as predictors of dose per unit internal or external exposure to radionuclides. The study examines the feasibility of critically evaluating the accuracy of these models for a comprehensive set of radionuclides of concern to the NRC. Each critical evaluation would include: identification of discrepancies between the models and current databases; characterization of uncertainties in model predictions of dose per unit intake or unit external exposure; characterization of variability in dose per unit intake or unit external exposure; and evaluation of prospects for development of more accurate models. Uncertainty refers here to the level of knowledge of a central value for a population, and variability refers to quantitative differences between different members of a population. This pilot study provides a critical assessment of models for selected radionuclides representing different levels of knowledge of dose per unit exposure. The main conclusions of this study are as follows: (1) To optimize the use of available NRC resources, the full study should focus on radionuclides most frequently encountered in the workplace or environment. A list of 50 …
Date:
October 1, 2008
Creator:
Leggett, Richard Wayne; Eckerman, Keith F & Meck, Robert A.
Object Type:
Report
System:
The UNT Digital Library
Research on Spent Fuel Storage and Transportation in CRIEPI (Part 2 Concrete Cask Storage)
Concrete cask storage has been implemented in the world. At a later stage of storage period, the containment of the canister may deteriorate due to stress corrosion cracking phenomena in a salty air environment. High resistant stainless steels against SCC have been tested as compared with normal stainless steel. Taking account of the limited time-length of environment with certain level of humidity and temperature range, the high resistant stainless steels will survive from SCC damage. In addition, the adhesion of salt from salty environment on the canister surface will be further limited with respect to the canister temperature and angle of the canister surface against the salty air flow in the concrete cask. Optional countermeasure against SCC with respect to salty air environment has been studied. Devices consisting of various water trays to trap salty particles from the salty air were designed to be attached at the air inlet for natural cooling of the cask storage building. Efficiency for trapping salty particles was evaluated. Inspection of canister surface was carried out using an optical camera inserted from the air outlet through the annulus of a concrete cask that has stored real spent fuel for more than 15 years. The camera …
Date:
October 1, 2008
Creator:
Shirai, Koji; Tani, Jyunichi; Arai, Taku; Watatu, Masumi; Takeda, Hirofumi; Saegusa, Toshiari et al.
Object Type:
Article
System:
The UNT Digital Library
Research Project on CO2 Geological Storage and Groundwater Resources: Water Quality Effects Caused by CO2 Intrusion into Shallow Groundwater
One promising approach to reduce greenhouse gas emissions is injecting CO{sub 2} into suitable geologic formations, typically depleted oil/gas reservoirs or saline formations at depth larger than 800 m. Proper site selection and management of CO{sub 2} storage projects will ensure that the risks to human health and the environment are low. However, a risk remains that CO{sub 2} could migrate from a deep storage formation, e.g. via local high-permeability pathways such as permeable faults or degraded wells, and arrive in shallow groundwater resources. The ingress of CO{sub 2} is by itself not typically a concern to the water quality of an underground source of drinking water (USDW), but it will change the geochemical conditions in the aquifer and will cause secondary effects mainly induced by changes in pH, in particular the mobilization of hazardous inorganic constituents present in the aquifer minerals. Identification and assessment of these potential effects is necessary to analyze risks associated with geologic sequestration of CO{sub 2}. This report describes a systematic evaluation of the possible water quality changes in response to CO{sub 2} intrusion into aquifers currently used as sources of potable water in the United States. Our goal was to develop a general understanding …
Date:
October 1, 2008
Creator:
Birkholzer, Jens; Apps, John; Zheng, Liange; Zhang, Yingqi; Xu, Tianfu & Tsang, Chin-Fu
Object Type:
Report
System:
The UNT Digital Library
Resource and Resource Sharing in Intelligent Information Access
This paper reports an exploratory study on resources and resource sharing among researchers in Intelligent Information Access (IIA).
Date:
October 2008
Creator:
Chen, Jiangping & Li, Fei
Object Type:
Paper
System:
The UNT Digital Library
Southwest Retort, Volume 61, Number 2, October 2008
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
October 2008
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Review of Top Quark Properties Measurements at the Tevatron
None
Date:
October 1, 2008
Creator:
Pleier, Marc-Andre
Object Type:
Article
System:
The UNT Digital Library
RHIC performance with 56 MHz RF and gold ion beams pre-cooled at lower energy
Presently there is an R&D ERL under construction at Collider-Accelerator Department (CAD) at BNL with its commissioning scheduled for FY09-10 [1]. The use of this full energy 21 MeV ERL in RHIC tunnel was recently proposed for a Proof-of-Principle demonstration of Coherent Electron Cooling of gold ions at 40 GeV/nucleon [2]. The purpose of this Note is to summarize numerical studies aimed at understanding the potential improvement of RHIC luminosity by using this R&D ERL for pre-cooling of Au ion beams with conventional electron cooling system at 40 GeV/nucleon. The constraints were such that electron beam parameters should be close to those expected from R&D ERL. Additionally, the cooling section in RHIC should not require major RHIC modification. As a result of these studies it was found that pre-cooling of gold ion at about 40 GeV/nucleon approximately doubles the average store luminosity of RHIC at top energy of 100 GeV/nucleon compared to the expected luminosity improvement with 56MHz RF upgrade [3, 4]. Significant luminosity improvement may be also gained on top of future expected luminosity performance with combined upgrades of 56MHz RF and all-plane stochastic cooling system with present beam parameters [5]. The electron beam parameters needed for such pre-cooling …
Date:
October 1, 2008
Creator:
Fedotov,A.
Object Type:
Report
System:
The UNT Digital Library
RHIC Performance with 56 MHz RF and Gold Ion Beams Pre-cooled at Lower Energy
N/A
Date:
October 1, 2008
Creator:
A., Fedotov
Object Type:
Report
System:
The UNT Digital Library
Risk Levels, Hazard Indices, and Cumulative Adjustment
This guidance document provides instruction in the correct use of carcinogenic risk levels and carcinogenic hazard indices for effect, due to the presence of both individual and multiple chemicals of concern (COC) when setting human protective concentration levels (PCL).
Date:
October 2008
Creator:
Texas Commission on Environmental Quality
Object Type:
Text
System:
The Portal to Texas History
Round Up, October/November 2008
Magazine published for Texas lottery retailers with information about the lottery games, incentives for retailers, and other news.
Date:
October 2008
Creator:
Texas Lottery Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Safeguard Application Options for the Laser-Based Item Monitoring System (LBIMS)
Researchers at Oak Ridge National Laboratory (ORNL) are developing a Laser-Based Item Monitoring System (LBIMS) for advanced safeguards at nuclear facilities. LBIMS uses a low-power laser transceiver to monitor the presence and position of items with retroreflective tags. The primary advantages of LBIMS are its scalability to continuously monitor a wide range of items, its ability to operate unattended, its low cost of implementation, and its inherent information security due to its line-of-sight and non-broadcasting operation. The primary proposed safeguard application of LBIMS is described in its name: item monitoring. LBIMS could be implemented in a storage area to continuously monitor containers of nuclear material and the area in which they are stored. The system could be configured to provide off-site notification if any of the containers are moved or removed or if the area is accessed. Individual tags would be used to monitor storage containers, and additional tags could be used to record information regarding secondary storage units and room access. The capability to register small changes in tag position opens up the possibility of several other uses. These include continuously monitoring piping arrangements for design information verification or recording equipment positions for other safeguards systems, such as tracking …
Date:
October 1, 2008
Creator:
Laughter, Mark D
Object Type:
Report
System:
The UNT Digital Library
The Sandia MEMS Passive Shock Sensor : FY08 testing for functionality, model validation, and technology readiness.
This report summarizes the functional, model validation, and technology readiness testing of the Sandia MEMS Passive Shock Sensor in FY08. Functional testing of a large number of revision 4 parts showed robust and consistent performance. Model validation testing helped tune the models to match data well and identified several areas for future investigation related to high frequency sensitivity and thermal effects. Finally, technology readiness testing demonstrated the integrated elements of the sensor under realistic environments.
Date:
October 1, 2008
Creator:
Walraven, Jeremy Allen; Blecke, Jill; Baker, Michael Sean; Clemens, Rebecca C.; Mitchell, John Anthony; Brake, Matthew Robert et al.
Object Type:
Report
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 93, No. 16, Ed. 1 Wednesday, October 1, 2008
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 1, 2008
Creator:
Shance, Brenda
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Search for Heavy Top-like Quarks t-rime ---> Wq Using Lepton Plus Jets Events in 1.96-TeV p anti-p Collisions
We present the results of a search for a new heavy top-like quark, tprime, decaying to a W boson and another quark using the CDF II Detector in Run II of the Tevatron ppbar collider. New top-like quarks are predicted in a number of models of new physics. Using a data sample corresponding to 2.8 fb-1 of integrated luminosity we fit the observed spectrum of total transverse energy and reconstructed quark mass to a combination of background plus signal. We see no evidence for tprime production, so use this result to set limits on the tprime tprimebar production cross section times the branching ratio of tprime to Wq and infer a lower limit of 311 GeV/c2 on the mass of the tprime at 95% CL.
Date:
October 1, 2008
Creator:
Lister, Alison
Object Type:
Article
System:
The UNT Digital Library
Search for High-Mass \boldmath$e^+e^-$ Resonances in \boldmath$p\bar{p}$ Collisions at \boldmath$\sqrt{s}=$1.96 TeV
A search for high-mass resonances in the e{sup +}e{sup -} final state is presented based on {radical}s =1.96 TeV p{bar p} collision data from the CDF II detector at the Fermilab Tevatron from an integrated luminosity of 2.5 fb{sup -1}. The largest excess over the standard model prediction is at an e{sup +}e{sup -} invariant mass of 240 GeV/c{sup 2}. The probability of observing such an excess arising from fluctuations in the standard model anywhere in the mass range of 150-1,000 GeV/c{sup 2} is 0.6% (equivalent to 2.5 {sigma}). We set Bayesian upper limits on {sigma}(p{bar p} {yields} X) {center_dot} {Beta}(X {yields} e{sup +}e{sup -}) at the 95% credibility level, where X is a spin 1 or spin 2 particle, and we exclude the standard model coupling Z{prime} and the Randall-Sundrum graviton for {kappa}/{bar M}{sub Pl} = 0.1 with masses below 963 and 848 GeV/c{sup 2}, respectively.
Date:
October 1, 2008
Creator:
Aaltonen, T.; Phys., /Helsinki Inst. of; Adelman, J.; /Chicago U., EFI; Akimoto, T.; U., /Tsukuba et al.
Object Type:
Article
System:
The UNT Digital Library
Search for High-Mass Resonances Decaying into Leptons of Different Flavor (e mu, e tau, mu tau) in p anti-p Collisions at sqrt(s) = 1.96 TeV
We present a search for high-mass resonances decaying into two leptons of different flavor: e{mu}, e{tau}, and {mu}{tau}. These resonances are predicted by several models beyond the standard model, such as the R-parity-violating MSSM. The search is based on 1 fb{sup -1} of data collected at the Collider Detector at Fermilab (CDF II) in proton anti-proton collisions. Our observations are consistent with the standard model expectations. The results are interpreted to set 95% C.L. upper limits on {sigma} x BR of {tilde {nu}}{sub {tau}} {yields} e{mu}, e{tau}, {mu}{tau}.
Date:
October 1, 2008
Creator:
Tu, Yanjun
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Search for New Physics in the B0(s) mixing phase
The Collider Detector at Fermilab (CDF) experiment performed the first measurement of the time-evolution of flavor-tagged B{sub s}{sup 0} {yields} J/{psi}{phi} decays, which probes mixing-induced CP-violation in the B{sub s}{sup 0} sector. Any sizable deviation from zero of the phase {beta}{sub s}J/{psi}{phi}, accessible through interference of the {bar b} {yields} {bar c}c{bar s} quark-level process accompanied or not by B{sub s}{sup 0}-{bar B}{sub s}{sup 0} mixing, would be unambiguous indication of physics beyond the Standard Model. I report CDF results obtained in 1.35 fb{sup -1}, a recent extension to a larger dataset corresponding to 2.8 fb{sup -1}, and future projections.
Date:
October 1, 2008
Creator:
Tonelli, Diego
Object Type:
Article
System:
The UNT Digital Library
Search for particles decaying into $Z\gamma$ at D0
Results on the search for particles decaying into Z{gamma}({yields} {ell}{ell}{gamma}) are presented. Using roughly 1 fb{sup -1} of data, dilepton-plus-photon invariant mass distributions have been examined for an excess over the theoretical predictions. Having observed a good agreement between data and the standard model prediction we set 95% C.L. upper limits on the cross section times branching fraction ({sigma} x {Beta}) of the resonance Z{gamma} production.
Date:
October 1, 2008
Creator:
Ferapontov, Alexey V.
Object Type:
Article
System:
The UNT Digital Library
Search for super symmetry at the Tevatron using the trilepton signature
This dissertation describes a search for the associated production of the supersymmetric particles, the chargino and the neutralino, through their R-parity conserving decays to three leptons and missing energy. This search is carried out using the data collected at the CDF experiment at the Tevatron {radical}s = 1.96 TeV p{bar p} collider at Fermilab. The results are obtained by combining five independent channels with varying signal to background ratio. Overall, a total of 6.4 {+-} 1.1 background events from standard model processes and 11.4 {+-} 1.1 signal events for a particular choice of mSUGRA model parameters are expected. The observation of 7 events in data is consistent with the standard model background expectation, and the mSUGRA model is constrained. Limits are set on the cross section of Chargino-Neutralino pair production, and a limit on the mass of the chargino is extracted. A method of obtaining model-independent results is also discussed.
Date:
October 1, 2008
Creator:
Dube, Sourabh Shishir
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Selected Isotopes for Optimized Fuel Assembly Tags
In support of our ongoing signatures project we present information on 3 isotopes selected for possible application in optimized tags that could be applied to fuel assemblies to provide an objective measure of burnup. 1. Important factors for an optimized tag are compatibility with the reactor environment (corrosion resistance), low radioactive activation, at least 2 stable isotopes, moderate neutron absorption cross-section, which gives significant changes in isotope ratios over typical fuel assembly irradiation levels, and ease of measurement in the SIMS machine 2. From the candidate isotopes presented in the 3rd FY 08 Quarterly Report, the most promising appear to be Titanium, Hafnium, and Platinum. The other candidate isotopes (Iron, Tungsten, exhibited inadequate corrosion resistance and/or had neutron capture cross-sections either too high or too low for the burnup range of interest.
Date:
October 1, 2008
Creator:
Gerlach, David C.; Mitchell, Mark R.; Reid, Bruce D.; Gesh, Christopher J. & Hurley, David E.
Object Type:
Report
System:
The UNT Digital Library
Selective progressive response of soil microbial community to wild oat roots
Roots moving through soil enact physical and chemical changes that differentiate rhizosphere from bulk soil, and the effects of these changes on soil microorganisms have long been a topic of interest. Use of a high-density 16S rRNA microarray (PhyloChip) for bacterial and archaeal community analysis has allowed definition of the populations that respond to the root within the complex grassland soil community; this research accompanies previously reported compositional changes, including increases in chitinase and protease specific activity, cell numbers and quorum sensing signal. PhyloChip results showed a significant change in 7% of the total rhizosphere microbial community (147 of 1917 taxa); the 7% response value was confirmed by16S rRNA T-RFLP analysis. This PhyloChip-defined dynamic subset was comprised of taxa in 17 of the 44 phyla detected in all soil samples. Expected rhizosphere-competent phyla, such as Proteobacteria and Firmicutes, were well represented, as were less-well-documented rhizosphere colonizers including Actinobacteria, Verrucomicrobia and Nitrospira. Richness of Bacteroidetes and Actinobacteria decreased in soil near the root tip compared to bulk soil, but then increased in older root zones. Quantitative PCR revealed {beta}-Proteobacteria and Actinobacteria present at about 10{sup 8} copies of 16S rRNA genes g{sup -1} soil, with Nitrospira having about 10{sup 5} copies …
Date:
October 1, 2008
Creator:
DeAngelis, K. M.; Brodie, E. L.; DeSantis, T. Z.; Andersen, G. L.; Lindow, S. E. & Firestone, M. K.
Object Type:
Article
System:
The UNT Digital Library