280 research outputs found
Science Potential of a Deep Ocean Antineutrino Observatory
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
[Review of] Garbi Schmidt, Islam in Urban America: Sunni Muslims in Chicago
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
On the Initial Mass Function of Population III Stars
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
cm, where H2 cooling by three-body reactions is effective and
the fragment mass is more massive than some tens . 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
cm. After the density reaches cm, 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 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 and , 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.
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
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
The Almost Perfect Scale in Medical Students: Model Confirmation, Measurement Invariance, and Differential Item Functioning By Gender
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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