著者

濱島 良吉

出版者

前橋工科大学

雑誌

前橋工科大学研究紀要 (ISSN:13438867)

巻号頁・発行日

no.6, pp.1-6, 2003-03

被引用文献数

1

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At present, a slow earthquake is continuing in the Tokai area. Then, the energy of approximately magnitude of 7.2 is estimated to have released. However, it doesn't find whether or not this slow earthquake develops into the big earthquake. This slow earthquake is supposed to have occurred because a part of the Philippin sea plate comes off. As the result, the extraordinary crustal movement in the Tokai district has been clarified from the GPS observation result. Moreover, recently, the extraordinary crustal movement has occurred in the wide area including Kanto and the central area. In this research, An analysis to clarify the occurrence mechanism of the earthquake in the Japanese Islands was progressed and the movement of the tectonic line in the Japanese Islands was clarified.

出版者

公立大学法人 前橋工科大学

雑誌

前橋工科大学研究紀要 (ISSN:13438867)

巻号頁・発行日

vol.22, pp.75-80, 2019 (Released:2019-11-11)

著者

清水 美代 土屋 十圀 孫 士禹

出版者

前橋工科大学

雑誌

前橋工科大学研究紀要 (ISSN:13438867)

巻号頁・発行日

vol.10, pp.34-40, 2007-03-30

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Many water resources depends on a mountainous district river basin in Japan, especially, snow coverage area play an important role in the water resources, therefore it is necessary to perform development and management of water resources exactly. For that purpose, since it is necessary to grasp a characteristic of runoff correctly, the discharge is calculated using the long-term runoff analysis model of Ando which can conduct analysis from fundamental hydrological data, such as daily rainfall and average daily temperature. The water cycle model has a physical meaning, and can reproduce the changes of a long-term outflow well by comparatively easy calculation. Although this model is already applied even in some mountainous district river basins, there are few research examples in a full-scale snow area. Therefore, it applied to the Sakura river which is a snow area, the conformity of this model was examined in detail, and it aimed at clarifying the water balance in the Sakura river. As a result, when influence of snow and meltingsnow was not taken into consideration, the correlation coefficient of observation runoff and calculation runoff was very low. However, when the influence of snow coverage and melting snow is taken into consideration, high correlation was shown, and an accurate analysis was able to be conducted. Moreover, the water balance in the Sakura River became dear from the result of the runoff analysis for five years from 2001 to 2005.

著者

土屋 十圀 中村 要介

出版者

前橋工科大学

雑誌

前橋工科大学研究紀要 (ISSN:13438867)

巻号頁・発行日

vol.9, pp.9-15, 2006-03-31

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This study estimated the safety degree of flood control at Yattajima, the Tone river, Japan to verify effects of additional dams. Rainfall events considered are Typhoon Catherine in 1947, Ise Bay Typhoon in 1959, the typhoon No. 15 in 1981, and the typhoon No. 5 in 1998. The storage function method was used for runoff analysis, which showed good agreement between observed and computed discharges. Using the spatiotemporal rainfall pattern of Typhoon Catherine, this study simulated rainfall-runoff at each time stage; 1959 with two dams, 1981 with five dams, and 1998 with six dams (the same as present situation), and evaluated the effect of these added dams on flood control in terms of the decrease of peak discharge at Yattajima. The decreases estimated were 513-1,253m^3/s for the 1959 situation; 2,025-2,765m^3/s for 1981; and 2,233-2,973m^3/s for 1998. It is also verified that the present situation with six dams can cope with 200-year floods, which is significant improvement because the past situation without dams could cope with 100-year floods.

著者

原島 秀人

出版者

前橋工科大学

雑誌

前橋工科大学研究紀要 (ISSN:13438867)

巻号頁・発行日

vol.4, pp.107-110, 2001-03-25

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There are a number of MOOs (MUD Object Oriented, where MUD stands for Multi-User Dimension) currently developed in Japan. It is questionable, however, if they will ever become popular or educationally successful. This paper will review the current developments of educational MOOs in Japan and describe some of the problems they entail. The problems include such issues as weak incentives for inviting users, lack of enough chatting ability in English among Japanese users, shortage of participation from English native speakers, want of hard-working wizards or moderators, high connection cost, lack of audio-visual stimulus, network restriction against constant telnet connection, and i-mode popularity. SaMOOrai, Costello, Kyoto-MOO, InterZone University, AndroMOO, and isMOO will be examined among others as different applications of MOO-related technology in Japan. Their characteristics, strength, and weakness will be discussed before some ideas for improving Japanese MOO environments are finally proposed.