26,288 research outputs found

    Probing Unquenching Effects in the Gluon Polarisation in Light Mesons

    Full text link
    We introduce an extension to the ladder truncated Bethe-Salpeter equation for mesons and the rainbow truncated quark Dyson-Schwinger equations which includes quark-loop corrections to the gluon propagator. This truncation scheme obeys the axialvector Ward-Takahashi identity relating the quark self-energy and the Bethe-Salpeter kernel. Two different approximations to the Yang-Mills sector are used as input: the first is a sophisticated truncation of the full Yang-Mills Dyson-Schwinger equations, the second is a phenomenologically motivated form. We find that the spectra and decay constants of pseudoscalar and vector mesons are overall described well for either approach. Meson mass results for charge eigenstate vector and pseudoscalar meson masses are compared to lattice data. The effects of unquenching the system are small but not negligible.Comment: 26 pages, 13 figure

    Dissociating task difficulty from incongruence in face-voice emotion integration

    Get PDF
    In the everyday environment, affective information is conveyed by both the face and the voice. Studies have demonstrated that a concurrently presented voice can alter the way that an emotional face expression is perceived, and vice versa, leading to emotional conflict if the information in the two modalities is mismatched. Additionally, evidence suggests that incongruence of emotional valence activates cerebral networks involved in conflict monitoring and resolution. However, it is currently unclear whether this is due to task difficulty—that incongruent stimuli are harder to categorize—or simply to the detection of mismatching information in the two modalities. The aim of the present fMRI study was to examine the neurophysiological correlates of processing incongruent emotional information, independent of task difficulty. Subjects were scanned while judging the emotion of face-voice affective stimuli. Both the face and voice were parametrically morphed between anger and happiness and then paired in all audiovisual combinations, resulting in stimuli each defined by two separate values: the degree of incongruence between the face and voice, and the degree of clarity of the combined face-voice information. Due to the specific morphing procedure utilized, we hypothesized that the clarity value, rather than incongruence value, would better reflect task difficulty. Behavioral data revealed that participants integrated face and voice affective information, and that the clarity, as opposed to incongruence value correlated with categorization difficulty. Cerebrally, incongruence was more associated with activity in the superior temporal region, which emerged after task difficulty had been accounted for. Overall, our results suggest that activation in the superior temporal region in response to incongruent information cannot be explained simply by task difficulty, and may rather be due to detection of mismatching information between the two modalities

    Semiquantitative Infrared Analysis of Diketones and Anhydrides in a Reaction Mixture

    Get PDF
    The ozonolysis of a hydroxymethylene ketone yields a mixture of diketone and anhydride. Treatment of hydroxymethylene camphor with ozone affords, in addition to the expected camphor quinone, a surprisingly large amount of camphoric anhydride (56%) via Baeyer-Villager reaction. Use of infrared absorption to analyze the relative amounts of camphor quinone and camphoric anhydride in a reaction mixture was studied by comparing peak heights of their carbonyl stretching bands

    Builders: Sketches Methodist Preachers in South Carolina with Historical Data

    Get PDF
    Published by Southern Christian Advocate, 1932.This directory contains biographical sketches and photos of clergy serving the South Carolina and Upper South Carolina Conferences of the Methodist Episcopal Church, South in 1932. It also contains a historical sketch of Methodism in South Carolina, historical data about deceased clergy, and photographs of churches and church institutions.https://digitalcommons.wofford.edu/methodistdirectories/1005/thumbnail.jp

    A Study of How the Results of the Third International Mathematics and Science Study Might be Used to Promote Improvement in Mathematics and Science Locally

    Get PDF
    An applied project submitted in partial fulfillment of the requirements for the degree of Education Specialist at Morehead State University by Joyce O. Watson on May 10, 1998

    Image patch analysis and clustering of sunspots: a dimensionality reduction approach

    Full text link
    Sunspots, as seen in white light or continuum images, are associated with regions of high magnetic activity on the Sun, visible on magnetogram images. Their complexity is correlated with explosive solar activity and so classifying these active regions is useful for predicting future solar activity. Current classification of sunspot groups is visually based and suffers from bias. Supervised learning methods can reduce human bias but fail to optimally capitalize on the information present in sunspot images. This paper uses two image modalities (continuum and magnetogram) to characterize the spatial and modal interactions of sunspot and magnetic active region images and presents a new approach to cluster the images. Specifically, in the framework of image patch analysis, we estimate the number of intrinsic parameters required to describe the spatial and modal dependencies, the correlation between the two modalities and the corresponding spatial patterns, and examine the phenomena at different scales within the images. To do this, we use linear and nonlinear intrinsic dimension estimators, canonical correlation analysis, and multiresolution analysis of intrinsic dimension.Comment: 5 pages, 7 figures, accepted to ICIP 201

    A Framework for Quality Assurance in Child Welfare

    Get PDF
    This guide outlines a framework for implementing quality assurance programs for child welfare services. The components are based on federal requirements, national standards, and child welfare research. Five steps are described: select outcomes and standards, integrate quality assurance goals and procedures throughout the agency, collect data about outcomes, analyze data, and improve systems as indicated by evaluation findings. Specific topics include the role of the quality assurance system in the Child and Family Services Review process, communication of quality assurance practices, and staff participation in analysis. The manual describes each step of the quality assurance system and reviews the tasks.https://digitalcommons.usm.maine.edu/facbooks/1096/thumbnail.jp
    • …
    corecore