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BBISS(Broad Band Internet Service via Satellite)Ka-band Broadband Satellite Plan
Tatsukawa, Kenichi,Akinaga, Wakoto,Yamada, Kenichi,Hashimoto, Katsumasa,Okui, Tamio,Koishi, Yoichi,Horiuch, Yasuo 통신위성우주산업연구회 2004 Joint Conference on Satellite Communications Vol.2004 No.-
Broadband internet, by ADSL, fiber optic, and CATV circuit has become very popular. However this service can not be shared in the depopulated area, where Broadband service business is difficult to materialize. BBISS satellite has been planned to provide the Broadband service to these un-equipped areas. In order to do so, a wide Ka frequency band is utilized and moreover, multi-beam antenna is adopted to realize the improvement of the efficient frequency reuse and to succeed in earth station antenna miniaturization. As for the problematic matter in use of the Ka-band due to great rainfall attenuation will be solved by use of adaptive code modulation method and realize high availability, and high=speed information speed will be provided in case of fine weather by maintaining the necessary minimum margin. This paper introduces best effort service by BBISS with such features.
Drop Metastasis of Adrenocorticotropic Hormone-Producing Pituitary Carcinoma to the Cauda Equina
Kenichi Takeuchi,Yoko Hagiwara,Koichi Kanaya,Keiji Wada,Masahiro Shiba,Yoshiharu Kato 대한척추외과학회 2014 Asian Spine Journal Vol.8 No.5
The diagnosis of pituitary carcinoma cannot be made easily histologically, and most cases of pituitary carcinoma are diagnosed only after the clinical detection of metastasis. Distant metastasis of pituitary tumor occurs in 0.1% to 0.2% of cases and has been reported in the liver, bone and central nervous system, with only one case of metastasis to the cauda equine reported. This study describes a rare case of the drop metastasis of adrenocorticotropic hormone-producing pituitary adenocarcinoma to the cauda equina, causing cauda equina syndrome.
Kenichi Nagaoka,Akihiro Shimizu,Katsumi Ida,Katsunori Ikeda,Katsuyoshi Tsumori,Kazuo Toi,Keisuke Matsuoka,Kiyomasa Watanabe,Masaki Osakabe,Mikiro Yoshinuma,Mitsutaka Isobe,Osamu Kaneko,Shoichi Okamura 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The characteristics of neutral beam driven current have been investigated in helical devices, which do not need ohmic current to produce a magnetic field configuration. The neutral beam current drive experiments have been performed in a wide range of Zb/Zeff in LHD and CHS. The Z dependence of neutral beam driven current in the region of Zb/Zeff < 1 obtained by neon discharges in LHD agrees with the Ohkawa model. On the other hand, the current driven by neon beam injection in CHS cannot be explained by the Ohkawa model.