Browsing Ohio State University Research and Scholarship by Title
Now showing results 618-637 of 833
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Quality of care in elder emergency department patients with pneumonia: a prospective cohort study
Caterino, Jeffrey M.; Hiestand, Brian C.; Martin, Daniel R. ( 2008-04-30 )Background: The goals of the study were to assess the relationship between age and processes of care in emergency department (ED) patients admitted with pneumonia and to identify independent predictors of failure to meet ... -
Quantification of the differences between quenched and annealed averaging for RNA secondary structures
Liu, Tsunglin; Bundschuh, Ralf ( 2005-12-12 )The analytical study of a disordered system is usually difficult due to the necessity to perform a quenched average over the disorder. Thus, one may resort to the easier annealed ensemble as an approximation to the quenched ... -
Quantitative image analysis of intra-tumoral bFGF level as a molecular marker of paclitaxel resistance
Walsh, Colin T.; Wei, Yong; Wientjes, M. Guillaume; Au, Jessie L. S. ( 2008-01-18 )Background: The role of basic fibroblast growth factor (bFGF) in chemoresistance is controversial; some studies showed a relationship between higher bFGF level and chemoresistance while other studies showed the opposite ... -
Quantitative Interpretation of Quasar Microlensing Light Curves
Kochanek, C. S. ( 2004-04-10 )We develop a general method for analyzing the light curves of microlensed quasars and apply it to the OGLE light curves of the four-image lens Q2237+0305. We simultaneously estimate the effective source velocity, the average ... -
Quantum fluctuations in the superfluid state of the BCS-BEC crossover
Diener, Roberto B.; Sensarma, Rajdeep; Randeria, Mohit ( 2008-02-29 )We determine the effects of quantum fluctuations about the T=0 mean-field solution of the BCS-BEC crossover in a dilute Fermi gas using the functional integral method. These fluctuations are described in terms of the ... -
Quantum Monte Carlo study of a magnetic-field-driven two-dimensional superconductor-insulator transition
Kim, Kwangmoo; Stroud, David ( 2008-11-17 )We numerically study the superconductor-insulator phase transition in a model disordered two-dimensional (2D) superconductor as a function of applied magnetic field. The calculation involves quantum Monte Carlo calculations ... -
Quasar Clustering and the Lifetime of Quasars
Martini, Paul; Weinberg, David H. ( 2001-01-20 )Although the population of luminous quasars rises and falls over a period of ~10^9 yr, the typical lifetime of individual quasars is uncertain by several orders of magnitude. We show that quasar clustering measurements can ... -
R-current DIS on a shock wave: Beyond the eikonal approximation
Kovchegov, Yuri V. ( 2010-09-08 )We find the deep inelastic scattering (DIS) structure functions at strong coupling by calculating R-current correlators on a finite-size shock wave using AdS/CFT correspondence. We improve on the existing results in the ... -
Radiative Energy Loss in a Finite Dynamical QCD Medium
Djordjevic, Magdalena; Heinz, Ulrich ( 2008-07-10 )The radiative energy loss of a quark jet traversing a finite size QCD medium with dynamical constituents is calculated to first order in opacity. Although finite size corrections reduce the energy loss relative to an ... -
Radiative heavy quark energy loss in a dynamical QCD medium
Djordjevic, Magdalena; Heinz, Ulrich ( 2008-02-20 )The computation of radiative energy loss in a dynamically screened QCD medium is a key ingredient in obtaining reliable predictions for jet quenching in ultrarelativistic heavy-ion collisions. We calculate, to first order ... -
The Radius-Luminosity Relationship For Active Galactic Nuclei: The Effect of Host-Galaxy Starlight On Luminosity Measurements. II. The Full Sample of Reverberation-Mapped AGNs
Bentz, Misty C.; Peterson, Bradley M.; Netzer, Hagai; Pogge, Richard W.; Vestergaard, Marianne ( 2009-05-20 )We present high-resolution Hubble Space Telescope images of all 35 active galactic nuclei (AGNs) with optical reverberation-mapping results, which we have modeled to create a nucleus-free image of each AGN host galaxy. ... -
Rainfall sequence effects on phosphorus loss in surface runoff from pastures that received poultry litter application
Demissie, T.; Storm, D. E.; Friend, M. S.; Basta, N. T.; Payton, M. E.; Smolen, M. D.; Zhang, H. ( 2010-07 )Land application of poultry litter to pasture elevates the concentration of phosphorus in surface runoff and it is becoming an increasing problem in sensitive water bodies. The objectives of this study were to assess the ... -
Rapid phase-modulated water-excitation steady-state free precession for fat-suppressed cine cardiovascular MR
Lin, Hung Y.; Raman, Subha; Chung, Yiu C.; Simonetti, Orlando ( 2008-05-13 )BACKGROUND:The purpose of this article is to describe a steady-state free precession (SSFP) sequence for fat-suppressed cine cardiovascular magnetic resonance (CMR). A rapid phase-modulated binomial water-excitation (WE) ... -
The Rate of the Reaction between C_2 H and C_2 H_2 at Interstellar Temperatures
Herbst, Eric; Woon, David E. ( 1997-11-01 )The reaction between the radical C_2 H and the stable hydrocarbon C_2 H_2 is one of the simplest neutral-neutral hydrocarbon reactions in chemical models of dense interstellar clouds and carbon-rich circumstellar shells. ... -
Reaction Time Distribution Analysis of Neuropsychological Performance in an ADHD Sample
Hervey, Aaron S.; Epstein, Jeffery N.; Curry, John F.; Tonev, Simon; Arnold, L. Eugene; Conners, C. Keith; Hinshaw, Stephen P.; Swanson, James M.; Hechtman, Lily ( 2006 )Differences in reaction time (RT) variability have been documented between children with and without Attention Deficit Hyperactivity Disorder (ADHD). Most previous research has utilized estimates of normal distributions ... -
Real-time cine and myocardial perfusion with treadmill exercise stress cardiovascular magnetic resonance in patients referred for stress SPECT
Raman, Subha V.; Dickerson, Jennifer A.; Jekic, Mihaela; Foster, Eric L.; Pennell, Michael L.; McCarthy, Beth; Simonetti, Orlando P. ( 2010-07-12 )Background: To date, stress cardiovascular magnetic resonance (CMR) has relied on pharmacologic agents, and therefore lacked the physiologic information available only with exercise stress. Methods: 43 patients age 25 ... -
Recent shoaling of the nutricline and thermocline in the western tropical Pacific
Williams, B.; Grottoli, A. G. ( 2010 )Long records of subsurface ocean observations are key to constrain our understanding of the climate response of the tropical Pacific to increasing greenhouse gases. Due to the lack of continuous ocean observations, ... -
Recently duplicated maize R2R3 Myb genes provide evidence for distinct mechanisms of evolutionary divergence after duplication
Dias, Anusha; Braun, Edward L.; McMullen, Michael D.; Grotewold, Erich ( 2003-01 )R2R3 Myb genes are widely distributed in the higher plants and comprise one of the largest known families of regulatory proteins. Here, we provide an evolutionary framework that helps explain the origin of the plant-specific ... -
Reciprocal regulation of nuclear factor kappa B and its inhibitor ZAS3 after peripheral nerve injury
Wu, Lai-Chu; Goettl, Virginia M.; Madiai, Francesca; Hackshaw, Kevin V.; Hussain, Syed-Rehan A. ( 2006-01-12 )Background: NF-κB binds to the κB motif to regulate transcription of genes involved in growth, immunity and inflammation, and plays a pivotal role in the production of pro-inflammatory cytokines after nerve injuries. ... -
Recombination rate coefficients for KLL dielectronic satellite lines of Fe XXV and Ni XXVII
Nahar, Sultana Nurun; Oelgoetz, J.; Pradhan, A. K. ( 2009 )The unified method for total electron-ion recombination is extended to study the dielectronic satellite (DES) lines. These lines, formed from radiative decay of autoionizing states, are highly sensitive temperature diagnostics ...