The dissociation energy of N2

The requirements for very accurate ab initio quantum chemical prediction of dissociation energies are examined using a detailed investigation of the nitrogen molecule. Although agreement with experiment to within 1 kcal/mol is not achieved even with the most elaborate multireference CI (configuration interaction) wave functions and largest basis sets currently feasible, it is possible to obtain agreement to within about 2 kcal/mol, or 1 percent of the dissociation energy. At this level it is necessary to account for core-valence correlation effects and to include up to h-type functions in the basis. The effect of i-type functions, the use of different reference configuration spaces, and basis set superposition error were also investigated. After discussing these results, the remaining sources of error in our best calculations are examined

Red blood cell transfusion within the first 24 hours of admission is associated with increased mortality in the pediatric trauma population: a retrospective cohort study

Abstract Background Allogeneic red blood cell transfusion is associated with increased morbidity and mortality in adult trauma patients. Although studies have suggested that the adoption of a more restrictive transfusion strategy may be safely applied to critically ill adult and all-cause critically ill pediatric patients, recent developments in our understanding of the negative consequences of red blood cell transfusion have focused almost entirely on adult populations, while the applicability of these findings to the pediatric population remains poorly defined. The object of this study was to evaluate the effect of red blood cell transfusion within the first 24 hours following admission on mortality in pediatric trauma patients treated at our institution. Results Age, race, and mechanism of injury did not differ between transfused and non-transfused groups, although there were significantly more female patients in the transfusion group (51 vs. 37%; p < 0.01). Shock index (pulse/systolic blood pressure), injury severity score, and new injury severity score were all significantly higher in the transfused group (1.21 vs. 0.96, 26 vs. 10, and 33 vs. 13 respectively; all p ≤ 0.01). Patients who received a red blood cell transfusion experienced a higher mortality compared to the non-transfused group (29% vs. 3%; p < 0.001). When attempting to control for injury severity, goodness-of-fit analysis revealed a poor fit for the statistical model preventing reliable conclusions about the contribution of red blood cell transfusion as an independent predictor of mortality. Conclusion Red blood cell transfusion within the first 24 hours following admission is associated with an increase in mortality in pediatric trauma patients. The potential contribution of red blood cell transfusion as an independent predictor of hospital mortality could not be assessed from our single-institution trauma registry. A review of state-wide or national trauma databases may be necessary to obtain adequate statistical confidence

World Handbook of Political Indicators IV

Research project funded for academic years 2006-07, 2007-08, and 2008-09The University Archives has determined that this item is of continuing value to OSU's history.The World Handbook of Political Indicators has been published by Yale University Press since 1963 to provide statistics and data to help scholars studying political processes and political change. While the handbook has been the dominant source for analyzing conflict and violence internationally, data collection for the last edition stopped in 1982. In this fourth edition, Jenkins and his team aim to bring the handbook current to 2003 and make the data available over the Internet. In the process, they have made several revolutionary changes that will prepare the handbook for 21st century research.Mershon Center for International Security StudiesProject summar

A Comparative Analysis of Retail Store Image: Wal-Mart and Dillards

The research in this manuscript reports on analyses of retail image which compares the images of two well- known U.S. retailers. The scale used is the research is one that has been specifically designed to evaluate consumers\u27 perceptions of retailers. The results indicate that differential scale items are required to meaningfully assess different varieties of retail establishments. Specifically, the findings indicate that consumers assess retailers in a manner which seems consistent for retail store type. The study offers conclusions and insights based upon the differential items used to assess discount retailers and traditional department stores

Teaching and understanding of quantum interpretations in modern physics courses

Just as expert physicists vary in their personal stances on interpretation in quantum mechanics, instructors vary on whether and how to teach interpretations of quantum phenomena in introductory modern physics courses. In this paper, we document variations in instructional approaches with respect to interpretation in two similar modern physics courses recently taught at the University of Colorado, and examine associated impacts on student perspectives regarding quantum physics. We find students are more likely to prefer realist interpretations of quantum-mechanical systems when instructors are less explicit in addressing student ontologies. We also observe contextual variations in student beliefs about quantum systems, indicating that instructors who choose to address questions of ontology in quantum mechanics should do so explicitly across a range of topics.Comment: 18 pages, references, plus 2 pages supplemental materials. 8 figures. PACS: 01.40.Fk, 03.65.-

Conflict Carrying Capacity and the Early Warning of Civil Violence

The University Archives has determined that this item is of continuing value to OSU's history.This project addresses the institutional management of intergroup conflict as well as questions of ethnic conflict and their impact on U.S. and global security. It will evaluate a formal model of conflict carrying capacity conceptualized as the ability of states to regulate intense civil conflicts without resort to significant violence.Mershon Center for International Security Studiesproject summar

Regional Cerebral Blood Flow Patterns in Children vs. Adults with ADHD Combined and Inattentive Types: A SPECT Study

Objective: The current study sought to determine whether ADHD Combined Type (ADHD-C) and ADHD Primarily Inattentive Type (ADHD-PI) showed differential regional cerebral blood flow (rCBF) patterns in children vs. adults. Participants and Methods: The overall sample (N=1484) was effectively split into four groups: adults with ADHD-PI (n=519), adults with ADHD-C (n=405), children with ADHD-PI (n=192), children with ADHD-C (n=368). All participants were void of bipolar, schizophrenia, autism, neurocognitive disorders, and TBI. The data were collected from a de-identified archival database of individuals who underwent SPECT scans at rest. Results: Using αConclusions: Overall, the current study suggested that children may show rCBF differences between different ADHD subtypes, but adults may not. The current study did not find significance in any of the 17 brain regions examined when comparing adults with ADHD-C to adults with ADHD-PI. All significant findings were attributed to the children with ADHD-C group showing aberrant blood flow rate than at least one other group. Previous research has supported that the differentiation of these subtypes as distinctive disorders is difficult to make in adults (Sobanski et al., 2006). Other research has indicated the potential of imaging techniques to differentiate the two in children (Al-Amin, Zinchenko, & Geyer, 2018). The current findings support nuanced ways in which rCBF patterns of ADHD-C and ADHD-PI differ between children and adults

The C-Band All-Sky Survey: Instrument design, status, and first-look data

The C-Band All-Sky Survey (C-BASS) aims to produce sensitive, all-sky maps of diffuse Galactic emission at 5 GHz in total intensity and linear polarization. These maps will be used (with other surveys) to separate the several astrophysical components contributing to microwave emission, and in particular will allow an accurate map of synchrotron emission to be produced for the subtraction of foregrounds from measurements of the polarized Cosmic Microwave Background. We describe the design of the analog instrument, the optics of our 6.1 m dish at the Owens Valley Radio Observatory, the status of observations, and first-look data.Comment: 10 pages, 11 figures, published in Proceedings of SPIE MIllimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V (2010), Vol. 7741, 77411I-1 - 77411I-1