著者
尾池 和夫
出版者
公益社団法人 日本地震学会
雑誌
地震 第2輯 (ISSN:00371114)
巻号頁・発行日
vol.28, no.3, pp.331-346, 1975-10-10 (Released:2010-03-11)
参考文献数
17
被引用文献数
1 3

Five stations of the Tottori Microearthquake Observatory have supplied an amount of records of microearthquakes since June, 1965. They are very useful to investigate the characteristics of spatial and temporal distribution of microearthquakes. Using data from three stations MZT, OYT and IZT, a seismological bulletin has been compiled. It contains P, P-S and P-F times and directions of initial motions at three stations, the coordinates of foci calculated from data of three stations and magnitude of each shock determined from total duration (P-F time).From June, 1965 to December, 1973, 7346 earthquake foci have been determined. Their epicenters have been plotted on seismicity maps. One of significant results from them is that the close relation between active faults and alignments of epicenters has been recognized.Computed results of epicenters from data of the three stations have good accuracy comparing with those from five stations. Errors of hypocenters near to the network are less than 2km. Those of distant foci whose P-S times are larger than 10 seconds are less than 10km. Because of the important purpose to know the temporal distribution of microearthquakes, almost all data containing some reading values which do not have so good accuracy have been used for calculation.Frequency distribution of magnitudes shows the normal activity in this region. It also shows that distant shocks whose magnitude are larger than 2.0 and epicentral distances are about 150km, are detected by this network of three stations. Hypocenters whose magnitudes are larger than 1.0 have been detected in the near region around the network.
著者
尾池 和夫 三雲 健
出版者
公益社団法人 日本地震学会
雑誌
地震 第2輯 (ISSN:00371114)
巻号頁・発行日
vol.21, no.1, pp.54-66, 1968-05-30 (Released:2010-03-11)
参考文献数
6

A multipartite seismometer array with a span of about 1km has been set up at one of the temporary stations for the observation of microearthquakes in Wakayama region, to examine the effects of local underground structure.The apparent velocity and direction of wave approach for about 200 microearthquakes were determined by means of least squares from arrival times of P waves at 5 recording sites, as well as from the conventional tripartite technique. Parameters computed from 4 selected tripartite nets show systematic deviations from the results of least squares in relation to the azimuth. A possible explanation for the azimuthal dependence and for average travel-time residuals for each of the recording sites would be that there exists an upward-warping interface in the shallow portion of the crust. Several kinds of later phases can be identified on seismograms between the initial P and S waves. Their apparent velocities and travel-times appear to be consistent with the interpretation that these phases may be SV waves converted from incident P waves or vice versa at the above interface.
著者
野田 弘 尾池 和夫
出版者
公益社団法人 日本地震学会
雑誌
地震 第2輯 (ISSN:00371114)
巻号頁・発行日
vol.39, no.4, pp.635-643, 1986-12-25 (Released:2010-03-11)
参考文献数
8

Variations of the level of ground water were observed at four stations near the epicenter of the shallow earthquake (M4.6) which occurred in the southern part of the Lake Biwa which has been recently a low seismicity region.About ten days before the occurrence of the earthquake anomalous changes of the water level were observed. Considering the relation between the variation of water level and rainfall in the ordinary period these anomalous changes were precursors of the earthquake.Co-seismic steps of the water level were observed at two stations. One of them was a sudden ascent which was observed at the region where initial P motions were compressional. At another station which was in the dilatational P region sudden descents were recorded.Such characteristic variations of the ground water level are detectable by using deep wells when an earthquake occur conspicuously in the low seismicity region, even if its magnitude is small.
著者
尾池 和夫 松村 一男
出版者
公益社団法人 日本地震学会
雑誌
地震 第2輯 (ISSN:00371114)
巻号頁・発行日
vol.38, no.3, pp.359-364, 1985-09-25 (Released:2010-03-11)
参考文献数
2
被引用文献数
2

A new system for the temporary observation of earthquakes have been developed. Analogue memories by CMOS-RAM and usual audio cassette stereophonic recorder are used for the system. They are well developed and cheap. Seismic wave signals and time code signals are holded in the memories by the trigger signal and recorded into a cassette as the audio signals converted by high frequency sampling clock. Multichannel observation is possible by the channel serial output.Playback of signals is done by the simple memory system converting signals from audio frequency to the suitable frequency. Audio signal analyzers are also available for the direct playback signals of the tape recorder.In the case of two-channels. recorder which wee call OM-2 type, , using WM-D6C recorder with Dolby-B noise reduction system, 46-db dynamic range can be gotten for each channel. We are observing microearthquakes at more than 20 temporary stations by the recorders with a high-gain and a low-gain channel for one component vertical senser to get records of microearthquakes and unsaturated records of largee shocks. About 900 eventss are stored in a 60 minutes cassette tape in this case.
著者
太田 浩良 羽山 正義 金子 靖典 松本 竹久 川上 由行 熊谷 俊子 久保田 聖子 勝山 努
出版者
一般社団法人 日本臨床化学会
雑誌
臨床化学 (ISSN:03705633)
巻号頁・発行日
vol.35, no.1, pp.37-47, 2006-01-31 (Released:2012-11-27)
参考文献数
50
被引用文献数
1

Helicobacter pylori (H. pylori) は、1983年にWarrenとMarshallにより慢性胃炎患者の胃粘膜より分離培養されたグラム陰性菌である。H. pyloriの発見は、胃疾患をめぐる状況に劇的な変化をもたらした。慢性胃炎がH. pyloriという起炎菌による感染症として理解されるようになり、さらに, H. pyloriが胃十二指腸潰瘍、さらには胃癌、胃悪性リンパ腫に関連する重要な因子であることが明らかにされてきた。H. pylori感染胃粘膜にみられる病理組織学的変化は, 細菌側の因子とこれに対する宿主側の反応が絡み合って形成される。胃炎惹起や胃発ガンのメカニズムの解明が分子レベルで急速に進んでいる。H. pyloriの感染診断法には, 内視鏡検査を必要としない非侵襲的検査法 (尿素呼気試験、抗体測定法、便中抗原測定法) と, 内視鏡検査を必要をとする侵襲的検査法 (迅速ウレアーゼ試験、鏡検法、培養法) がある。それぞれの検査法には長所や短所があるのでその特徴を理解した上で選択することが肝要である。
著者
向井 考史
出版者
関西学院大学
雑誌
神學研究 (ISSN:05598478)
巻号頁・発行日
vol.47, pp.i-iii, 2000-03-31
著者
伊藤一隆 著
出版者
北水協会事務所
巻号頁・発行日
1892