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630 results on '"Sakai, Kazuo"'

229. Measurement of cosmic-ray neutron dose onboard a polar route flight from New York to Seoul.

Author

Yasuda, Hiroshi, Lee, Jaejin, Yajima, Kazuaki, Hwang, Jung A., and Sakai, Kazuo

Subjects
RADIATION protection, RADIATION measurements, NUMERICAL analysis, NEUTRON measurement, RADIOLOGY
Abstract

Exposure to cosmic radiation in operation of a jet aircraft is considered to be a part of the occupational exposure. Cosmic radiation doses received in aviation are generally evaluated by numerical model simulations. The precision of the model calculation should be verified by measurements. From the viewpoint of radiological protection, neutrons are the most contributing radiation component and have to be precisely measured. Neutron measurements were thus performed in a long-haul flight using a relatively new transportable neutron monitor (WENDI-II) which responds fairly well to the cosmic-ray neutrons. The in-flight measurement was carried out on 5–6 November 2009 on a polar route flight from New York/John F. Kennedy airport to Seoul/Incheon airport. The flying time was ∼14 h. The observations obtained as 1 cm ambient dose equivalent were compared with model calculations using a computer program developed by the authors for the calculation of aviation route doses ‘JISCARD EX’. Good agreements between the measured and calculated values were observed over the polar route where the geomagnetic cut-off rigidity is the lowest. [ABSTRACT FROM PUBLISHER]

Published
2011
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238. Depression in Members of a New Religious Sect in Japan

Author

Satoh, Shinji, primary, Takiguchi, Naohiko, additional, Shoji, Masami, additional, Sakai, Kazuo, additional, Seno, Eiichi, additional, Naito, Shiro, additional, Tomita, Hiroshi, additional, Hara, Jun, additional, Konishi, Takako, additional, Kano, Katsumi, additional, and Oda, Susumu, additional

Published
1990
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248. Ionotropic Glutamate Receptors and Expression of N-Methyl-D-Aspartate Receptor Subunits in...

Author

Xue-Min Gao and Sakai, Kazuo

Subjects
*SCHIZOPHRENIA, *GLUTAMIC acid, *MESSENGER RNA
Abstract

Tests the hypothesis that glutamatergic transmission within and efferent from hippocampus is altered in schizophrenia. Level of messenger RNA for the N-methyl-D-aspartic acid (NMDA) receptor substituents; Possibility of functional impairment in glutamatergic transmission; Impact of alterations at NMDA-sensitive receptors to the pathology of the illness.

Published
2000
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