background: in radiotherapy, wedge filters are used for optimizing the tumor dose distribution in patients. the attenuation in beam intensity due to the presence of wedge filter is compensated by means of a wedge factor measured at the central axis of the beam. the field size, depth and ssd dependence of wedge factor have been assessed for 9mv radiations of neptun pc linear accelerator. materia...

the s-transform has widely been used in the analysis of non-stationary time series. a simple method to obtain depth estimates of gravity field sources is introduced in this study. we have developed a new method based on the spectral characteristics of downward continuation to estimate depth of structures. this calculation procedure is based on replacement of the fourier transform with the s-tra...

Hideji Tanaka, Tomoko Kitani, Masafumi Amano, Yuzo Yamamoto, Takayuki Shoji, Shigehiko Urawa, Masatoshi Ban, Masa-aki Fukuwaka, Yasuhiko Naito, and Hiroshi Ueda Biosphere Informatics, Department of Social Informatics, Kyoto University, Kyoto 606-8501, Japan Laboratroy of Aquatic Ecosystem Conservation, Graduate School of Fisheries Science, Hokkaido University, Sapporo 060-0809, Japan Laboratory...

Hydrogen sulfide: a novel gaseous signaling molecule and intracellular Ca regulator in 1 rat parotid acinar cells 2 3 Amira Moustafa1,2 and Yoshiaki Habara1 4 Laboratory of Physiology, Department of Biomedical Sciences, Graduate School of 5 Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan; Department of 6 Physiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 4...

AUTOPHAGY-RELATED PROTEIN (ATG) 8-FAMILY INTERACTING MOTIF IN ATG3 MEDIATES THE ATG3-ATG8 INTERACTION AND IS CRUCIAL FOR THE CYTOPLASM-TO-VACUOLE TARGETING PATHWAY* Masaya Yamaguchi, Nobuo N. Noda, Hitoshi Nakatogawa§, Hiroyuki Kumeta, Yoshinori Ohsumi, and Fuyuhiko Inagaki Department of Structural Biology, Graduate school of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Integ...

The aim of this work is to completely describe two families Lie algebras whose groups have negative sectional curvature. first family consists satisfying the following property: given any vectors in algebra, linear subspace spanned by them a subalgebra. On other hand, second reduced Iwasawa type.