Emory University

Atlanta, GA, United States

Departments View all

Department of Pediatrics
4,490
Total Impact Points
115
Members
Department of Pathology and Laboratory Medicine
7,471
Total Impact Points
91
Members
Department of Psychiatry and Behavioral Sciences
6,512
Total Impact Points
88
Members

Publication History View all

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    ABSTRACT: Both grain surface and gas phase chemistry have been invoked to explain the disparate relative abundances of methyl formate and its structural isomers acetic acid and glycolaldehyde in the Sgr B2(N) star-forming region. While a network of grain surface chemistry involving radical–radical reactions during the warm-up phase of a hot core is the most chemically viable option proposed to date, neither qualitative nor quantitative agreement between modeling and observation has yet been obtained. In this study, we seek to test additional grain surface and gas phase processes to further investigate methyl formate-related chemistry by implementing several modifications to the Ohio State University gas/grain chemical network. We added two new gas phase chemical pathways leading to methyl formate, one involving an exothermic, barrierless reaction of protonated methanol with neutral formic acid; and one involving the reaction of protonated formic acid with neutral methanol to form both the cis and trans forms of protonated methyl formate. In addition to these gas phase processes, we have also investigated whether the relative product branching ratios for methanol photodissociation on grains influence the relative abundances of methyl formate and its structural isomers. We find that while the new gas phase formation pathways do not alter the relative abundances of methyl formate and its structural isomers, changes in the photodissociation branching ratios and adjustment of the overall timescale for warm-up can be used to explain their relative ratios in Sgr B2(N).
    The Astrophysical Journal 09/2015; 728:71-9.
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    ABSTRACT: We present the second output-sensitive skyline computation algorithm which is faster than the only existing output-sensitive skyline computation algorithm [1] in worst case because our algorithm does not rely on the existence of a linear time procedure for finding medians.
    Information Processing Letters 12/2014;
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    ABSTRACT: Objective To explore the perceptions of novice physical therapy clinical instructors (CIs) about their interactions and teaching behaviours with physical therapy students. Design A phenomenological approach using semi-structured interviews and a focus group. Participants Six novice physical therapy CIs (less than 2 years as a CI and supervised fewer than three students) were recruited purposefully from a large metropolitan area in the USA. All participants were credentialled by the American Physical Therapy Association. Main outcome measures Transcripts of interview data and focus group data were analysed using interpretative analysis for themes and subthemes. Results Participants viewed the transition of students from the classroom to the clinic as their primary role, using strategies of ‘providing a way in’, ‘fostering critical thinking’, ‘finding a balance’, ‘overcoming barriers’ and ‘letting go’. Conclusion While novice CIs showed skill in fostering student reflection and providing orientation, they struggled with student autonomy and balancing the competing obligations of patient care and clinical instruction. They expressed issues related to anxiety and lack of confidence. In the future, novice CIs could benefit from training and support in these areas.
    Physiotherapy 12/2014;

Information

  • Address
    201 Dowman Drive, 30322, Atlanta, GA, United States
  • Head of Institution
    James Wagner
  • Website
    www.emory.edu
  • Phone
    404.727.6123
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Top publications last week by downloads

 
International Business Review 01/1995;
172 Downloads
 
The American Journal of Medicine 02/2003; 114(3):188-93.
147 Downloads

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