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An Archaeological Survey of Proposed Water Pipeline Route Improvements and Deep Well Location for the Cross Country Water Supply Corporation
Archaeological survey results of proposed water pipeline improvements for the Cross County Water Supply Corporation in McLennen and Bosque County, Texas.
Date:
August 6, 2007
Creator:
AR Consultants
Object Type:
Report
System:
The Portal to Texas History
Mass, quark-number, and sqrt sNN dependence of the second andfourth flow harmonics in ultra-relativistic nucleus-nucleuscollisions
We present STAR measurements of the azimuthal anisotropyparameter v_2 for pions, kaons, protons, Lambda, bar Lambda, Xi+bar Xi,and \Omega + bar Omega, along with v_4 for pions, kaons, protons, andLambda + bar Lambda at mid-rapidity for Au+Au collisions at sqrt sNN=62.4and 200 GeV. The v_2(p_T) values for all hadron species at 62.4 GeV aresimilar to those observed in 130 and 200 GeV collisions. For observedkinematic ranges, v_2 values at 62.4, 130, and 200 GeV are as little as10 percent-15 percent larger than those in Pb+Pb collisions at sqrt s NN=17.3 GeV. At intermediate transverse momentum (p_T from 1.5-5 GeV/c),the 62.4 GeV v_2(p_T) and v_4(p_T) values are consistent with thequark-number scaling first observed at 200 GeV. A four-particle cumulantanalysis is used to assess the non-flow contributions to pions andprotons and some indications are found for a smaller non-flowcontribution to protons than pions. Baryon v_2 is larger than anti-baryonv_2 at 62.4 and 200 GeV perhaps indicating either that the initialspatial net-baryon distribution is anisotropic, that the mechanismleading to transport of baryon number from beam- to mid-rapidity enhancesv_2, or that anti-baryon and baryon annihilation is larger in thein-plane direction.
Date:
January 6, 2007
Creator:
Abelev, B. I.; Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett,J.; Anderson, B. D. et al.
Object Type:
Article
System:
The UNT Digital Library
Geometric metastability, quivers and holography
We use large N duality to study brane/anti-brane configurations on a class of Calabi-Yau manifolds. With only branes present, the Calabi-Yau manifolds in question give rise to N=2 ADE quiver theories deformed by superpotential terms. We show that the large N duality conjecture of hep-th/0610249 reproduces correctly the known qualitative features of the brane/anti-brane physics. In the supersymmetric case, the gauge theories have Seiberg dualities which are represented as flops in the geometry. Moreover, the holographic dual geometry encodes the whole RG flow of the gauge theory. In the non-supersymmetric case, the large N duality predicts that the brane/anti-brane theories also enjoy such dualities, and allows one to pick out the good description at a given energy scale.
Date:
September 6, 2007
Creator:
Aganagic, Mina; Aganagic, Mina; Beem, Christopher & Freivogel, Ben
Object Type:
Article
System:
The UNT Digital Library
Peaceful Uses Bona Fides: Criteria for Evaluation and Case Studies
This study applies a set of indicators to assess the peaceful nature of a state’s nuclear program. Evaluation of a country’s nuclear program relative to these indicators can help the international community to take appropriate actions to ensure that the growth of the global nuclear energy industry proceeds peacefully and to minimize nuclear proliferation risks.
Date:
June 6, 2007
Creator:
Ajemian, Chris K.; Hazel, Mike; Kessler, Carol E.; Mathews, Carrie E.; Morris, Fred A.; Seward, Amy M. et al.
Object Type:
Report
System:
The UNT Digital Library
Variable VHE gamma-ray emission from Markarian 501
The blazar Markarian 501 (Mrk 501) was observed at energies above 100 GeV with the MAGIC telescope from May through July 2005. The high sensitivity of the instrument enabled the determination of the flux and spectrum of the source on a night-by-night basis. Throughout our observational campaign, the flux from Mrk 501 was found to vary by an order of magnitude, and to be correlated with spectral changes. Intra-night flux variability with flux-doubling times down to 2 minutes was also observed. The strength of variability increased with the energy of the {gamma}-ray photons. The energy spectra were found to harden significantly with increasing flux, and a spectral peak clearly showed up during very active states. The position of the spectral peak seems to be correlated with the source luminosity.
Date:
February 6, 2007
Creator:
Albert, Jordi
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 25, No. 36, Ed. 1 Thursday, September 6, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
September 6, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 25, No. 49, Ed. 1 Thursday, December 6, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
December 6, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Fluctuation-Dissipation Theorem for Event-Dominated Processes
Article discussing the fluctuation-dissipation theorem for event-dominated processes.
Date:
July 6, 2007
Creator:
Allegrini, Paolo; Bologna, Mauro; Grigolini, Paolo & West, Bruce J.
Object Type:
Article
System:
The UNT Digital Library
New Constraints on Dark Energy from Chandra X-rayObservations of the Largest Relaxed Galaxy Clusters
We present constraints on the mean matter density, {Omega}{sub m}, dark energy density, {Omega}{sub DE}, and the dark energy equation of state parameter, w, using Chandra measurements of the X-ray gas mass fraction (fgas) in 42 hot (kT > 5keV), X-ray luminous, dynamically relaxed galaxy clusters spanning the redshift range 0.05 < z < 1.1. Using only the fgas data for the 6 lowest redshift clusters at z < 0.15, for which dark energy has a negligible effect on the measurements, we measure {Omega}{sub m}=0.28{+-}0.06 (68% confidence, using standard priors on the Hubble Constant, H{sub 0}, and mean baryon density, {Omega}{sub b}h{sup 2}). Analyzing the data for all 42 clusters, employing only weak priors on H{sub 0} and {Omega}{sub b}h{sup 2}, we obtain a similar result on {Omega}{sub m} and detect the effects of dark energy on the distances to the clusters at {approx}99.99% confidence, with {Omega}{sub DE}=0.86{+-}0.21 for a non-flat LCDM model. The detection of dark energy is comparable in significance to recent SNIa studies and represents strong, independent evidence for cosmic acceleration. Systematic scatter remains undetected in the f{sub gas} data, despite a weighted mean statistical scatter in the distance measurements of only {approx}5%. For a flat cosmology …
Date:
June 6, 2007
Creator:
Allen, S. W.; Rapetti, D. A.; Schmidt, R. W.; Ebeling, H.; Morris, G. & Fabian, A. C.
Object Type:
Article
System:
The UNT Digital Library
Pages of the United States Congress: History, Background Information, and Proposals for Change
None
Date:
February 6, 2007
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Ionizing radiation predisposes non-malignant human mammaryepithelial cells to undergo TGF beta-induced epithelial to mesenchymaltransition
Transforming growth factor {beta}1 (TGF{beta}) is a tumor suppressor during the initial stage of tumorigenesis, but it can switch to a tumor promoter during neoplastic progression. Ionizing radiation (IR), both a carcinogen and a therapeutic agent, induces TGF{beta}, activation in vivo. We now show that IR sensitizes human mammary epithelial cells (HMEC) to undergo TGF{beta}-mediated epithelial to mesenchymal transition (EMT). Non-malignant HMEC (MCF10A, HMT3522 S1 and 184v) were irradiated with 2 Gy shortly after attachment in monolayer culture, or treated with a low concentration of TGF{beta} (0.4 ng/ml), or double-treated. All double-treated (IR+TGF{beta}) HMEC underwent a morphological shift from cuboidal to spindle-shaped. This phenotype was accompanied by decreased expression of epithelial markers E-cadherin, {beta}-catenin and ZO-1, remodeling of the actin cytoskeleton, and increased expression of mesenchymal markers N-cadherin, fibronectin and vimentin. Furthermore, double-treatment increased cell motility, promoted invasion and disrupted acinar morphogenesis of cells subsequently plated in Matrigel{trademark}. Neither radiation nor TGF{beta} alone elicited EMT, even though IR increased chronic TGF{beta} signaling and activity. Gene expression profiling revealed that double treated cells exhibit a specific 10-gene signature associated with Erk/MAPK signaling. We hypothesized that IR-induced MAPK activation primes non-malignant HMEC to undergo TGF{beta}-mediated EMT. Consistent with this, Erk phosphorylation were …
Date:
April 6, 2007
Creator:
Andarawewa, Kumari L.; Erickson, Anna C.; Chou, William S.; Costes, Sylvain; Gascard, Philippe; Mott, Joni D. et al.
Object Type:
Article
System:
The UNT Digital Library
Temperature dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La1-xSrxMnO3
We have studied the temperature-dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La{sub 1-x}Sr{sub x}MnO{sub 3} (x= 0.3-0.4) with core and valence level photoemission (PE), x-ray absorption spectroscopy (XAS), x-ray emission spectroscopy (XES), resonant inelastic x-ray scattering (RIXS), extended x-ray absorption fine structure (EXAFS) spectroscopy and magnetometry. As the temperature is varied across the Curie temperature T{sub c}, our PE experiments reveal a dramatic change of the electronic structure involving an increase in the Mn spin moment from {approx} 3 {micro}B to {approx} 4 {micro}B, and a modification of the local chemical environment of the other constituent atoms indicative of electron localization on the Mn atom. These effects are reversible and exhibit a slow-timescale {approx}200 K-wide hysteresis centered at T{sub c}. Based upon the probing depths accessed in our PE measurements, these effects seem to survive for at least 35-50 {angstrom} inward from the surface, while other consistent signatures for this modification of the electronic structure are revealed by more bulk sensitive spectroscopies like XAS and XES/RIXS. We interpret these effects as spectroscopic fingerprints for polaron formation, consistent with the presence of local Jahn-Teller distortions of the MnO{sub 6} octahedra around the Mn …
Date:
December 6, 2007
Creator:
Arenholz, Elke; Mannella, N.; Booth, C. H.; Rosenhahn, A.; Sell, B. C.; Nambu, A. et al.
Object Type:
Article
System:
The UNT Digital Library
An Update on the Status of the NIF Power Conditioning System
The National Ignition Facility (NIF) Power Conditioning System provides the pulsed excitation required to drive flashlamps in the laser's optical amplifiers. Modular in design, each of the 192 Main Energy Storage Modules (MESMs) stores up to 2.2 MJ of electrical energy in its capacitor bank before delivering the energy to 20 pairs of flashlamps in a 400 {micro}s pulse (10% power points). The peak current of each MESM discharge is 0.5 MA. Production, installation, commissioning and operation of the NIF Power Conditioning continue to progress rapidly, with the goals of completing accelerated production and commissioning by early 2008, while maintaining an aggressive operation schedule. To date, more than 97% of the required modules have been assembled, shipped and installed in the facility, representing more that 380 MJ of stored energy available for driving NIF flashlamps. The MESMs have displayed outstanding reliability during daily, multiple-shift operations.
Date:
September 6, 2007
Creator:
Arnold, P. A.; Hulsey, S.; Ullery, G. T.; Petersen, D. E.; Pendleton, D. L.; Ollis, C. W. et al.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Clifford Ashby, March 6, 2007
The National Museum of the Pacific War presents an oral interview with Clifford Ashby. Ashby was born in Effingham, Illinois on 11 June 1925. He became interested in amateur radio while in high school and joined the Merchant Marines in 1943. After passing tests related to radio operations he was assigned to the liberty ship, SS James B. Francis (1942) as a radio operator. He tells of the ship loaded with ammunition sitting in the harbor at Guadalcanal with hoses pumping water on the deck to keep it cool. He also observed Japanese air raids over the island of Morotai. Ashby’s ship also participated in the invasion of Luzon. Later, he was assigned to the SS Benjamin Grierson commenting on the excellent food served aboard Liberty ships. He comments on the excellent wages paid to Merchant seaman and the fact that the pay was doubled when the ship was within a war zone. He tells of the SS Grierson setting at Ulithi with 40 other merchant ships for three months following the Japanese surrender. After leaving the Merchant Marine he attended various colleges and he comments on his career prior to retirement.
Date:
March 6, 2007
Creator:
Ashby, Clifford
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Clifford Ashby, March 6, 2007
The National Museum of the Pacific War presents an oral interview with Clifford Ashby. Ashby was born in Effingham, Illinois on 11 June 1925. He became interested in amateur radio while in high school and joined the Merchant Marines in 1943. After passing tests related to radio operations he was assigned to the liberty ship, SS James B. Francis (1942) as a radio operator. He tells of the ship loaded with ammunition sitting in the harbor at Guadalcanal with hoses pumping water on the deck to keep it cool. He also observed Japanese air raids over the island of Morotai. Ashby’s ship also participated in the invasion of Luzon. Later, he was assigned to the SS Benjamin Grierson commenting on the excellent food served aboard Liberty ships. He comments on the excellent wages paid to Merchant seaman and the fact that the pay was doubled when the ship was within a war zone. He tells of the SS Grierson setting at Ulithi with 40 other merchant ships for three months following the Japanese surrender. After leaving the Merchant Marine he attended various colleges and he comments on his career prior to retirement.
Date:
March 6, 2007
Creator:
Ashby, Clifford
Object Type:
Text
System:
The Portal to Texas History
Determination of the Form Factors for the Decay B0 to D*- l+ nu_l and of the CKM Matrix Element |Vcb|
We present a combined measurement of the Cabibbo-Kobayashi-Maskawa matrix element |V{sub cb}| and of the parameters {rho}{sup 2}, R{sub 1}(1), and R{sub 2}(1), which fully characterize the form factors for the B{sup 0} {yields} D*-{ell}+?{sub {ell}} decay in the framework of HQET. The results, based on a selected sample of about 52,800 B{sup 0} {yields} D*-{ell}+?{sub {ell}} decays, recorded by the BABAR detector, are {rho}{sup 2} = 1.156 {+-} 0.094 {+-} 0.028, R{sub 1}(1) = 1.329{+-}0.131{+-}0.044, R{sub 2}(1) = 0.859{+-}0.077{+-}0.022, and F(1)|V{sub cb}| = (35.0{+-}0.4{+-}1.1)x10-3. The first error is the statistical and the second is the systematic uncertainty. Combining these measurements with the previous BABAR measurement of the form factors, which employs a different ?t technique on a partial sample of the data, we improve the statistical precision of the result, {rho}{sup 2} = 1.179 {+-} 0.048 {+-} 0.028,R{sub 1}(1) = 1.417 {+-} 0.061 {+-} 0.044,R{sub 2}(1) = 0.836 {+-} 0.037 {+-} 0.022, and F(1)|V{sub cb}| = (34.7 {+-} 0.3 {+-} 1.1) x 10-3. Using lattice calculations for the axial form factor F(1), we extract |V{sub cb}| = (37.7{+-}0.3{+-}1.2{+-}{sup 1.2}{sub 1.4})x10{sup -3}, where the third error is due to the uncertainty in F(1). We also present a measurement of the …
Date:
June 6, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
First Observation of B+ to rho+ K0 and Measurement of its Branching Fraction and Charge Asymmetry
We present the first observation of the decay B{sup +} {yields} {rho}{sup +}K{sup 0}, using a data sample of 348 fb{sup -1} collected at the {Upsilon}(4S) resonance with the BABAR detector. The branching fraction and charge asymmetry are measured to be (8.0{sub -1.3}{sup +1.4} {+-} 0.5) x 10{sup -6} and (-12.2 {+-} 16.6 {+-} 2.0)%, respectively, where the first uncertainty is statistical and the second is systematic. The significance of the observed branching fraction, including systematic uncertainties, is 7.9 standard deviations.
Date:
March 6, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Measurement of CP Asymmetries in B0 to K0S K0S K0S Decays
The authors present measurements of the time-dependent CP-violating asymmetries in B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} decays based on 384 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They obtain the CP asymmetry parameters C = 0.02 {+-} 0.21 {+-} 0.05 and S = -0.71 {+-} 0.24 {+-} 0.04, where the first uncertainties are statistical and the second systematic. These results are consistent with standard model expectations.
Date:
March 6, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Measurement of CP Asymmetry in B0 to Ks pi0 pi0 Decays
We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K{sub S}{sup 0}{pi}{sup 0}{pi}{sup 0}, with K{sub S}{sup 0} {yields} {pi}{sup +}{pi}{sup -}. We use a sample of approximately 227 million B-meson pairs recorded at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II B-Factory at SLAC. From an unbinned maximum likelihood fit we extract the mixing-induced CP-violation parameter S = 0.72 {+-} 0.71 {+-} 0.08 and the direct CP-violation parameter C = 0.23 {+-} 0.52 {+-} 0.13, where the first uncertainty is statistical and the second systematic.
Date:
February 6, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Measurement of CP-Violating Asymmetries in B0 to (rho pi)0 using a Time-Dependent Dalitz Plot Analysis
We report a measurement of CP-violating asymmetries in B{sup 0} {yields} ({rho}{pi}){sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0} decays using a time-dependent Dalitz plot analysis. The results are obtained from a data sample of 375 million {Upsilon}(4S) {yields} B{bar B} decays, collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure 26 coefficients of the bilinear form-factor terms occurring in the time-dependent decay rate of the B{sup 0} meson. We derive the physically relevant quantities from these coefficients. In particular, we measure a constraint on the angle {alpha} of the Unitarity Triangle.
Date:
March 6, 2007
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
National Nuclear Material Accounting in Support of Non-Proliferation
None
Date:
June 6, 2007
Creator:
Babcock, R. A.
Object Type:
Article
System:
The UNT Digital Library
[E-Mail from Michael Baily to Various Subscribers, August 6, 2007]
E-Mail from Michael Baily to Various Subscribers sent on August 6, 2007. The email discusses a prior Rider Support team meeting including the important information about the upcoming Lone Star Ride fundraiser to fight AIDs.
Date:
August 6, 2007
Creator:
Bailey, Michael
Object Type:
Letter
System:
The UNT Digital Library
A brief survey on climate change effects on the Indian Monsoon
Each year, Indian summer monsoon season begins in June and ends in September. Surface winds blow from the southwest during this season. The Indian summer monsoon typically covers large areas of India with western and central India receiving more than 90% of their total annual precipitation during this period, and southern and northwestern India receiving 50%-75% of their total annual rainfall. Overall, monthly totals average 200-300 mm over the country as a whole, with the largest values observed during the heart of the monsoon season in July and August. In all total, India receives about 870 mm of rainfall in a normal summer monsoon season. This summary discusses the effects of climate change on the frequency, mean rainfall, duration and the variability of the Indian Monsoon. East Asian Monsoon in the southeastern part of Asia is not discussed in this summary. Changes in monsoon characteristics are mainly inferred from climate model simulations submitted to the Intergovernmental Panel on Climate Change (IPCC)'s Fourth Assessment Report (AR4). It should be cautioned that there is a large range in the results from these models. For instance, the range of mean monsoon precipitation as simulated by the AR4 models over India is from 500 …
Date:
February 6, 2007
Creator:
Bala, G.
Object Type:
Report
System:
The UNT Digital Library
Impedance Calculations of Non-Axisymmetric Transitions Using the Optical Approximation
In a companion report, we have derived a method for finding the impedance at high frequencies of vacuum chamber transitions that are short compared to the catch-up distance, in a frequency regime that--in analogy to geometric optics for light--we call the optical regime. In this report we apply the method to various non-axisymmetric geometries such as irises/short collimators in a beam pipe, step-in transitions, step-out transitions, and more complicated transitions of practical importance. Most of our results are analytical, with a few given in terms of a simple one dimensional integral. Our results are compared to wakefield simulations with the time-domain, finite-difference program ECHO, and excellent agreement is found.
Date:
March 6, 2007
Creator:
Bane, K. L. F.; Stupakov, G. & Zagorodov, I.
Object Type:
Article
System:
The UNT Digital Library