Polar ring galaxies are peculiar systems in which a gas rich, nearly polar ring surrounds an early-type or elliptical host galaxy. Two formation scenarios for these objects have been proposed: they are thought to form either in major galaxy mergers or by tidal accretion of the polar material from a gas rich donor galaxy. Both scenarios are studied through N-body simulations including gas dynami...

HED PARENT BODY. A. Yamaguchi, C. Okamoto, M. Ebihara, National Institute of Polar Research, Department of Polar Science, School of Multidisciplinary Science, Graduate University for Advanced Studies, Tokyo 173-8515, Japan ([email protected]), Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 1...

In slender-body theories, one often has to find asymptotic approximations for certain integrals, representing distributions of sources along a line segment. Here, such approximations are obtained by a systematic method that uses Mellin transforms. Results are given near the line (using cylindrical polar coordinates) and near the ends of the line segment (using spherical polar coordinates).

Polar bears (Ursus maritimus) have experienced substantial changes in the seasonal availability of sea ice habitat in parts of their range, including the Beaufort, Chukchi, and Bering Seas. In this study, we compared the body size, condition, and recruitment of polar bears captured in the Chukchi and Bering Seas (CS) between two periods (1986-1994 and 2008-2011) when declines in sea ice habitat...

Background: Preeclampsia is the most important problems in pregnancy that irreparable complications for mother and fetus has. Maternal body mass index in the first trimester of pregnancy and weight gain during pregnancy is important in pregnancy outcome. This study to determine the association BMI first trimester mothers with preeclampsia have been done Materials and Methods: In this prospectiv...

In this research paper, we present a novel frame work for handling $m$-polar information by combining the theory of $m-$polar fuzzy  sets with graphs. We introduce certain types of edge regular $m-$polar fuzzy graphs and edge irregular $m-$polar fuzzy graphs. We describe some useful properties of edge regular, strongly edge irregular and strongly edge totally irregular $m-$polar fuzzy graphs. W...