280 research outputs found

    Science Potential of a Deep Ocean Antineutrino Observatory

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    This paper presents science potential of a deep ocean antineutrino observatory under development at Hawaii. The observatory design allows for relocation from one site to another. Positioning the observatory some 60 km distant from a nuclear reactor complex enables precision measurement of neutrino mixing parameters, leading to a determination of neutrino mass hierarchy. At a mid-Pacific location the observatory measures the flux and ratio of uranium and thorium decay neutrinos from earth's mantle and performs a sensitive search for a hypothetical natural fission reactor in earth's core. A subsequent deployment at another mid-ocean location would test lateral heterogeneity of uranium and thorium in earth's mantle.Comment: 3 pages- paper presented at NOW 2006, Lecce, Ital

    Tribute for Professor Lori Zenuk-Nishide

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    [Review of] Garbi Schmidt, Islam in Urban America: Sunni Muslims in Chicago

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    Islam in Urban America: Sunni Muslims in Chicago is a well-researched, carefully nuanced, and timely contribution to our understanding of Muslim Americans and an excellent corrective to the all-too-common tendency to homogenize both Islam and Muslims. This study stresses the multiple elements of diversity in American Islam by focusing on how ethnicity, class, gender, class, age, and ideology have influenced the presentation and practice of Sunni Islam among immigrant communities in Chicago during the 1990s. Garbi Schmidt is currently a researcher in the ethnic minorities program at the Danish National Institute of Social Research in Copenhagen. This book is a revision of her Ph.D. dissertation and is the result of fieldwork among immigrant Muslim Americans that she conducted in the Chicago area over the course of a year and a half in 1995 and 1996

    Cultural learning for diplomatic training

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    On the Initial Mass Function of Population III Stars

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    The collapse and fragmentation of filamentary primordial gas clouds are explored using 1D and 2D hydrodynamical simulations coupled with the nonequilibrium processes of H2 formation. The simulations show that depending upon the initial density,there are two occasions for the fragmentation of primordial filaments. If a filament has relatively low initial density, the radial contraction is slow due to less effective H2 cooling. This filament tends to fragment into dense clumps before the central density reaches 108910^{8-9} cm3^{-3}, where H2 cooling by three-body reactions is effective and the fragment mass is more massive than some tens MM_\odot. In contrast, if a filament is initially dense, the more effective H2 cooling with the help of three-body reactions allows the filament to contract up to n1012n\sim 10^{12} cm3^{-3}. After the density reaches n1012n\sim 10^{12} cm3^{-3}, the filament becomes optically thick to H2 lines and the radial contraction subsequently almost stops. At this final hydrostatic stage, the fragment mass is lowered down to 1M\approx 1M_\odot because of the high density of the filament. The dependence of the fragment mass upon the initial density could be translated into the dependence on the local amplitude of random Gaussian density fields or the epoch of the collapse of a parent cloud. Hence, it is predicted that the initial mass function of Population III stars is likely to be bimodal with peaks of 102M\approx 10^2 M_\odot and 1M\approx 1M_\odot, where the relative heights could be a function of the collapse epoch.Comment: Accepted by Ap

    UNDERSTANDING ANCIENT COMBATIVES: THE “HEEL MANOEUVRE” IN PHILOSTRATUS’ HEROICUS 14.4 – 15.3.

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    The above-cited passage — in the form of a dialogue between the Vinedresser and the Phoenician — reads as follows

    The Expected and Unexpected Failures of the Global 30 Program

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    The Global 30 (G30) program was tasked with aiding in increasing the number of international students and to promote the overa l l internationalization of higher education in Japan. However, upon its conception, continuing through its implementation, and eventually to its premature cancellation, the G30 program proved to be more failure than success. This paper discusses how the G30 program failed in its aims, both in explicit increases in international students as well as implicit improvement in the international outlook of higher education institutions in Japan

    Vocational Guidance in the Elementary Grades

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    The Almost Perfect Scale in Medical Students: Model Confirmation, Measurement Invariance, and Differential Item Functioning By Gender

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    This study examined the factor structure of two common perfectionism scales – the Almost Perfect Scale – Revised (APS-R) and the Short Almost Perfect Scale (SAPS) - in medical students. It was found that both two-factor models hold for them, albeit marginally for the APS-R. Measurement invariance by gender showed that while configural invariance and metric invariance hold, scalar invariance does not, indicating that the means for men and women may not be meaningfully compared by using these scales. Additionally, several items exhibited differential item functioning, most of which are in the Discrepancy scale of the APS-R. Overall, the SAPS provides better fit with fewer biased items, and therefore is likely to be a better instrument for comparing perfectionism in men and women medical students, although direct comparison of group means should still be exercised with caution
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