• 제목/요약/키워드: Hokkaido

검색결과 754건 처리시간 0.024초

Seasonal Variation of the Soya Warm Current Observed by HF Ocean Radars

  • Ebuchi Naoto;Fukamachi Yasushi;Ohshima Kay I;Shirasawa Kunio;Ishikawa Masao;Takatsuka Tom;Dailbo Takaharu;Wakatsuchi Masaaki
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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    • pp.184-187
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    • 2004

  • Three HF ocean radar stations were installed at the Soya Strait in the Sea of Okhotsk in order to monitor the Soya Warm Current. Frequency of the HF radar is 13.9 MHz, and range and azimuth resolutions are 3 km and 5 deg., respectively. Surface current velocity observed by the radars shows good agreement with drifting buoy and shipboard ADCP observations. The velocity of Soya Warm Current reaches its maximum, which is about 1 m/s, in summer, and becomes weak in winter. The surface transport across the strait shows a significant correlation with the sea level difference along the strait.

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韓國과 日本 北海道에서의 農地利用에 관한 調査硏究 (An Investigative Stucy on the Farmland Uses in Korea and Hokkaido of Japan)

  • 김기성;;최예환
    • 한국농공학회지
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    • 제33권3호
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    • pp.81-90
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    • 1991

  • The purpose of the this study was to investigate and analyze the various statistical data on the actual state of farmland uses given in Korea and Hokkaido of Japan. The results of this research are as follows ; 1. The rate of farmland uses was marked 118% and 99% in Korea and Hokkaido of Japan in 1988, respectively. That of Korea was higher than that of Hokkaido of Japan. The tendency of the value for Korea has been decreased since the value was shown peak in 1980, but that of the value for Hokkaido was found gradually the increased value. It was analyzed that the reason why the value was decreased in Korea was referred to avoid the crops culture, and the reason why the value was increased in Hokkaido was dueto increase the area of pasture. 2. The farmland use system according to region were d ue to be the mixing pattern of rice culture and dry-field crops in East region of korea and the type of mainly rice culture in West region. The pattern of farmland use system was used to be performed mainly the rice culture in Central region, the mixing type of rice culture and dry-field crops in South region, and the agriculture of mainly dry-field crops and dairy in East-North region in Hokkaido. 3. In the light of the rate of planting, the rate of rice culture and dry-field crops were 49% and 51% in Korea, respectively. As the values were 13% and 87% in Hokkaido of Japan, respectively, the dry-field crops attained the superiority. The main crop kinds was shown the rice culture in Korea and the feed plant in Hokkaido of Japan, respectively. 4. In considering the above results, there are much differences in agricultural style and industrialization processes in both country Korea and Japan. Especially much more differences were evident from farmland use system of Hokkaido Island where had unique agricultural style in Japan.

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STUDY ON X-RAYS AND NEUTRONS LEAKED FROM A 45 MeV ELECTRON LINAC FACILITY

  • Sawamura, Sadashi;Kitaichi, Masatoshi;Nojiri, Ichiro;Yamada, Takuma;Kaneko, Junichi;Sawamura, Teruko
    • Journal of Radiation Protection and Research
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    • 제26권3호
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    • pp.133-137
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    • 2001

  • Spatial and time distributions of x-rays and neutrons from Hokkaido University 45 MeV electron linac facility were measured and compared with the calculation. In the calculation, x-rays in a Pb-target were evaluated using the EGS-code. The x-rays and the neutrons from the target to the facility building boundary and skyshine process outside the facility building were simulated with the EGS and the MCNP respectively.

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