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Fifth Street, TX, United States

Texas Lutheran University is an undergraduate, coeducational, private, undergraduate university of the Liberal Arts, science and Professional Studies affiliated with the Evangelical Lutheran Church in America. It is located in Seguin, Texas, about thirty-five miles east of San Antonio, and fifty miles south of Austin. TLU is ranked #3 by the U.S. News & World Report 2014 Best West Regional Universities. Wikipedia.

Moglia R.S.,Texas A&M University | Holm J.L.,Texas A&M University | Sears N.A.,Texas A&M University | Wilson C.J.,Texas Lutheran University | And 2 more authors.
Biomacromolecules | Year: 2011

Polymerization of high internal phase emulsions (polyHIPEs) is a relatively new method for the production of high-porosity scaffolds. The tunable architecture of these polyHIPE foams makes them attractive candidates for tissue engineered bone grafts. Previously studied polyHIPE systems require either toxic diluents or high cure temperatures which prohibit their use as an injectable bone graft. In contrast, we have developed an injectable polyHIPE that cures at physiological temperatures to a rigid, high-porosity foam. First, a biodegradable macromer, propylene fumarate dimethacrylate (PFDMA), was synthesized that has appropriate viscosity and hydrophobicity for emulsification. The process of surfactant selection is detailed with particular focus on the key structural features of both polymer (logP values, hydrogen bond acceptor sites) and surfactant (HLB values, hydrogen bond donor sites) that enable stable HIPE formation. Incubation of HIPEs at 37 °C was used to initiate radical cross-linking of the unsaturated double bond of the methacrylate groups to polymerize the continuous phase and lock in the emulsion geometry. The resulting polyHIPEs exhibited ∼75% porosity, pore sizes ranging from 4 to 29 μm, and an average compressive modulus and strength of 33 and 5 MPa, respectively. These findings highlight the great potential of these scaffolds as injectable, tissue engineered bone grafts. © 2011 American Chemical Society. Source

Fish V.L.,Massachusetts Institute of Technology | Muehlbrad T.C.,Massachusetts Institute of Technology | Muehlbrad T.C.,Texas Lutheran University | Pratap P.,Massachusetts Institute of Technology | And 4 more authors.
Astrophysical Journal | Year: 2011

ClassI methanol masers are believed to be produced in the shock-excited environment around star-forming regions. Many authors have argued that the appearance of various subsets of classI masers may be indicative of specific evolutionary stages of star formation or excitation conditions. Until recently, however, no major interferometer was capable of imaging the important 36 GHz transition. We report on Expanded Very Large Array observations of the 36 GHz methanol masers and Submillimeter Array observations of the 229 GHz methanol masers in DR21(OH), DR21N, and DR21W. The distribution of 36 GHz masers in the outflow of DR21(OH) is similar to that of the other classI methanol transitions, with numerous multitransition spatial overlaps. At the site of the main continuum source in DR21(OH), classI masers at 36 and 229 GHz are found in virtual overlap with classII 6.7 GHz masers. To the south of the outflow, the 36 GHz masers are scattered over a large region but usually do not appear coincident with 44 GHz masers. In DR21W, we detect an "S-curve" signature in Stokes V that implies a large value of the magnetic field strength if interpreted as due to Zeeman splitting, suggesting either that classI masers may exist at higher densities than previously believed or that the direct Zeeman interpretation of S-curve Stokes V profiles in classI masers may be incorrect. We find a diverse variety of different maser phenomena in these sources, suggestive of differing physical conditions among them. © 2011. The American Astronomical Society. All rights reserved. Source

Alioli S.,CERN | Bauer C.W.,Lawrence Berkeley National Laboratory | Berggren C.,Texas Lutheran University | Tackmann F.J.,German Electron Synchrotron | Walsh J.R.,Lawrence Berkeley National Laboratory
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2015

We present results for Drell-Yan production from the geneva Monte-Carlo framework. We combine the fully differential next-to-next-to leading order (NNLO) calculation with higher-order resummation in the 0-jettiness resolution variable. The resulting parton-level events are further combined with parton showering and hadronization provided by pythia8. The 0-jettiness resummation is carried out to NNLL′, which consistently incorporates all singular virtual and real NNLO corrections. It thus provides a natural perturbative connection between the NNLO calculation and the parton shower regime, including a systematic assessment of perturbative uncertainties. In this way, inclusive observables are correct to NNLO, up to small power corrections in the resolution cutoff. Furthermore, the perturbative accuracy of zero-jet-like resummation variables is significantly improved beyond the parton shower approximation. We provide comparisons with LHC measurements of Drell-Yan production at 7 TeV from ATLAS, CMS, and LHCb. As already observed in e+e- collisions, for resummation-sensitive observables, the agreement with data is noticeably improved by using a lower value of αs(MZ)=0.1135. © 2015 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "http://creativecommons.org/licenses/by/3.0/" Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Source

Hilbert S.A.,Texas Lutheran University | Caprez A.,University of Nebraska - Lincoln | Batelaan H.,University of Nebraska - Lincoln
New Journal of Physics | Year: 2011

In 1985, Matteucci and Pozzi (1985 Phys. Rev. Lett. 54 2469) demonstrated the presence of a quantum mechanical phase shift for electrons passing a pair of oppositely charged biprism wires. For this experimental arrangement no forces deflect the electrons. Consequently, the result was reported as a non-local type-2 Aharonov-Bohm effect. Boyer (2002 Found. Phys. 32 41-50; 1987 Nuovo Cimento B 100 685-701) showed theoretically that the Matteucci-Pozzi effect could be associated with a time delay caused by a classical force. We present experimental data that confirm the presence of a time delay. This result is in contrast to the situation for the original magnetic Aharonov-Bohm effect. On similar theoretical grounds, Boyer has also associated classical forces and time delays with the magnetic Aharonov-Bohm effect. Recently, we reported the absence of such observable time delays. The contrast with our current work illustrates the subtle nature of Aharonov-Bohm effects. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Source

Bonifonte A.,Georgia Institute of Technology | Ayer T.,Georgia Institute of Technology | Veledar E.,Emory University | Clark A.,Texas Lutheran University | Wilson P.W.F.,Emory University
Journal of the American Society of Hypertension | Year: 2015

Elevated blood pressure (BP) is associated with greater risk of cardiovascular disease (CVD), and evidence suggests that prior BP levels may be at least as important as current BP in prediction models. We analyzed the determinants of CVD risk in Offspring Framingham Heart Study participants (n = 3344). The baseline Cox model included the traditional risk factors and current systolic BP to predict 20-year risk of CVD (643 events). Current systolic BP was significant, and the associated hazard ratio was 1.09 for 10 mm Hg (confidence interval [CI] 95%: 1.04-1.15). A second model used the traditional risk factors plus antecedent BP (hazard ratio [HR] = 1.19; CI 95%: 1.10-1.24). In a third model that included traditional risk factors and both current and antecedent BP, the antecedent BP was significant (HR = 1.18; CI 95%: 1.08-1.23), but the current BP was not statistically significant (HR = 1.01; CI 95%: 0.97-1.09). Antecedent BP showed a significantly stronger effect on risk of CVD than current BP. © 2015 American Society of Hypertension. Source

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