The BaBar detector has operated over 200 2nd generation Resistive Plate Chambers (RPCs) in the forward endcap since 2002. Many chambers have increased noise rates and high voltage currents. These aging symptoms are correlated with the integrated RPC current as expected, but also depend on the rate and direction of the gas flow, indicating that pollutants produced in the gas can accelerate aging of downstream RPC surfaces. HF produced by decomposition of the Freon 134a component of the BaBar RPC gas in electric discharges has been proposed as the main pollutant. This paper presents measurements of HF production and absorption rates in BaBar RPCs. Since many of the highest rate chambers in the forward endcap were converted to avalanche mode operation, a comparison of HF production in streamer and avalanche mode RPCs is made. Correlations between the HF production rate and other chamber operating conditions were also explored.

This presentation gives an update on the digital collection at the University of North Texas (UNT) Libraries in their Digital Collection and The Portal to Texas History in 2008.

Pyridine hydrogenation in the presence of a surface monolayer consisting of cubic Pt nanoparticles stabilized by tetradecyltrimethylammonium bromide (TTAB) was investigated by sum frequency generation (SFG) vibrational spectroscopy using total internal reflection (TIR) geometry. TIR-SFG spectra analysis revealed that a pyridinium cation (C{sub 5}H{sub 5}NH{sup +}) forms during pyridine hydrogenation on the Pt nanoparticle surface, and the NH group in the C{sub 5}H{sub 5}NH{sup +} cation becomes more hydrogen bound with the increase of the temperature. In addition, the surface coverage of the cation decreases with the increase of the temperature. An important contribution of this study is the in situ identification of reaction intermediates adsorbed on the Pt nanoparticle monolayer during pyridine hydrogenation.

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

The National Museum of the Pacific War presents an oral interview with Atys Daniel Brunson. He discusses his family history, childhood, education and what led him to joining the US Navy. He describes his experiences during bootcamp and in the Pacific Theatre during World War Two.

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Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.

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The synthesis, crystal structure, solution stability and photophysical properties of an aryl group bridging two 1-hydroxypyridin-2-one units complexed to Eu(III) are reported. The results show that this backbone unit increases the rigidity of the ensuing complex, and also the conjugation of the ligand. As a result of the latter, the singlet absorption energy is decreased, along with the energy of the lowest excited triplet state. The resulting efficiency of sensitization for the Eu(III) ion is influenced by these phenomena, yielding an overall quantum yield of 6.2% in aqueous solution. The kinetic parameters arising from the luminescence data reveal an enhanced non-radiative decay rate for this compound when compared to previously reported aliphatic bridges.

We measure the conversion efficiency of 351 nm laser light to soft x-rays (0.1-5 keV) for Au, U and high Z mixtures 'cocktails' used for hohlraum wall materials in indirect drive ICF. We use spherical targets in a direct drive geometry, flattop laser pulses and laser smoothing with phase plates to achieve constant and uniform laser intensities of 10{sup 14} and 10{sup 15} W/cm{sup 2} over the target surface that are relevant for the future ignition experiments on NIF. The absolute time and spectrally-resolved radiation flux is measured with a multichannel soft x-ray power diagnostic. The conversion efficiency is then calculated by dividing the measured x-ray power by the incident laser power from which the measured laser backscattering losses is subtracted. After {approx}0.5 ns, the time resolved x-ray conversion efficiency reaches a slowly increasing plateau of 95% at 10{sup 14} W/cm{sup 2} laser intensity and of 80% at 10{sup 15} W/cm{sup 2}. The M-band flux (2-5 keV) is negligible at 10{sup 14} W/cm{sup 2} reaching {approx}1% of the total x-ray flux for all target materials. In contrast, the M-band flux is significant and depends on the target material at 10{sup 15} W/cm{sup 2} laser intensity, reaching values between 10% of …

Photograph of Betty Buckley singing on stage in the Winspear Hall of the Murchison Performing Arts Center on the UNT campus. Behind her is Kenny Werner playing the piano as an accompanist and she is standing on a rug.

The National Museum of the Pacific War presents an oral interview with John Espie. Although Espie was enrolled at Indiana University and joined the Army ROTC with intentions of being commissioned, he grew anxious about the draft and decided to enlist in the Navy in December 1942. Upon completion of quartermaster school, he embarked on amphibious training and was assigned to USS LST-734. He was at the helm in the Panama Canal and was an expert in dead reckoning at sea. At Guadalcanal he was trained on lessons learned at Tarawa, in preparation for transporting landing craft to Peleliu. There he watched Imperial Japanese marines from the shore as the island was assaulted. After transporting a group of engineers from Hollandia to the Leyte Gulf invasion, Espie survived enormous debris raining on his LST after a nearby ammunition ship exploded. Espie was eventually recommended to the V-12 program, returning to the States to attend Princeton University. When Japan surrendered, the program continued for another year but wound to a close before Espie received his commission. He was discharged into the Fleet Reserve and completed his degree on the G.I. Bill.

The National Museum of the Pacific War presents an oral interview with John Espie. Although Espie was enrolled at Indiana University and joined the Army ROTC with intentions of being commissioned, he grew anxious about the draft and decided to enlist in the Navy in December 1942. Upon completion of quartermaster school, he embarked on amphibious training and was assigned to USS LST-734. He was at the helm in the Panama Canal and was an expert in dead reckoning at sea. At Guadalcanal he was trained on lessons learned at Tarawa, in preparation for transporting landing craft to Peleliu. There he watched Imperial Japanese marines from the shore as the island was assaulted. After transporting a group of engineers from Hollandia to the Leyte Gulf invasion, Espie survived enormous debris raining on his LST after a nearby ammunition ship exploded. Espie was eventually recommended to the V-12 program, returning to the States to attend Princeton University. When Japan surrendered, the program continued for another year but wound to a close before Espie received his commission. He was discharged into the Fleet Reserve and completed his degree on the G.I. Bill.

Although the Standard Model of elementary particles is well established, strong interactions are not yet fully under control. We believe QCD is the field theory capable of describing them, but we are not yet capable, in most of the cases, to make exact predictions. Systems that include heavy quark-antiquark pairs (quarkonia) are ideal and unique laboratories to probe both the high energy regimes of QCD, where an expansion in terms of the coupling constant is possible, and the low energy regimes, where non-perturbative effects dominate. In the last years this field is experiencing a rapid expansion with a wealth of new data coming in from diverse sources: data on quarkonium formation from dedicated experiments (BES at BEPC, KEDR at VEPP-4M CLEO-c at CESR), clear samples produced by high luminosity B-factories (PEP and KEKB), and very large samples produced from gluon-gluon fusion in p{bar p} annihilations at Tevatron (CDF and D0 experiments). In this review I will first summarize recent developments in the understanding of heavy quarkonium states which have a well established quark content. Next, the core of the paper will be spent to review the experimental evidences of new states that might be aggregations of more than just a …

In the context of constructing one-loop amplitudes using a unitarity bootstrap approach we discuss a general systematic procedure for obtaining the coefficients of the scalar bubble and triangle integral functions of one-loop amplitudes. Coefficients are extracted after examining the behavior of the cut integrand as the unconstrained parameters of a specifically chosen parameterization of the cut loop momentum approach infinity. Measurements of new physics at the forthcoming experimental program at CERN's Large Hadron Collider (LHC) will require a precise understanding of processes at next-to-leading order (NLO). This places increased demands for the computation of new one-loop amplitudes. This in turn has spurred recent developments towards improved calculational techniques. Direct calculations using Feynman diagrams are in general inefficient. Developments of more efficient techniques have usually centered around unitarity techniques [1], where tree amplitudes are effectively 'glued' together to form loops. The most straightforward application of this method, in which the cut loop momentum is in D = 4, allows for the computation of 'cut-constructible' terms only, i.e. (poly)logarithmic containing terms and any related constants. QCD amplitudes contain, in addition to such terms, rational pieces which cannot be derived using such cuts. These 'missing' rational parts can be extracted using cut loop …

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Physics experiments at SLAC require high accuracy positioning, e. g. 100 {micro}m over a distance of 150 m or 25 {micro}m in a 10 x 10 x 3 meter volume. Laser Tracker measurement systems have become one of the most important tools for achieving these accuracies when mapping components. In order to improve and get a better understanding of laser tracker measurement tolerances we extended our laboratory with a rotary calibration table (Kugler GmbH) providing an accuracy of better than 0.2 arcsec. This paper gives an overview of the calibration table and its evaluation. Results of tests on two of our Laser Trackers utilizing the new rotary table as well as the SLAC interferometer bench are presented.

This report explains how there expenditures are treated under the federal tax code, reviews the legislative history of the deduction, assesses its effectiveness as a policy tool for expanding access to health care for the self-employed, describes proposals in the 110th Congress to modify and discusses policy issues it raises.

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Poster presented at the 2008 Music Library Association Annual Conference. This poster discusses online College of Music recordings at the University of North Texas (UNT).

Weekly newspaper from Grandview, Texas that includes local, state, and national news along with advertising.

In March of 2007 a document was issued, see attachment I, that defined the test protocol and required welding for the Kansas City Plant to change cutting oils from the recently approved 50:50 oil to an oil with similar characteristics but with different chemistry, additives, and possibly a different vendor due to plans by the current vendor to stop preparing the oils that are used in the KCP 50:50 mix. The KCP manufactured stems with the existing 50:50 oil blend in late FY07 and SRNL welded the stems and evaluated them in agreement with the test plan. This report provides all the data from these set-up and test welds. Set-up welds were shot and low and high voltages (currents) to ensure the window limits were applicable and then additional welds were made to validate the window. The purpose of this report is to ensure that the agreed upon path forward is still applicable.

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Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.