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Preliminary Analysis for Ground Structure around Source Region of 2008 Iwate-Miyagi Nairiku Earthquake

Journal of Civil Engineering and Architecture 2011年第2期5卷 175-179页

作者： Hitoshi Morikawa Masachika Tanigawa Taiyo Kobayashi Hiroko Matsuo Oepartment of Built Environment Tokyo Institute of Technology Yokohama 226-8502 Japan local goverment of kanagawa prefecture Yokohama Japan

To obtain a detailed model of the three-dimensional ground structure, the microtoremor and gravity surveys were carried out around Kurikoma area, Japan, where is the source reagion of 2008 Iwate-Miyagi nairiku earthquake and is located about 90 km north of Sendai. Using the microtremor data, velocity structures of shallow sediments are estimated and the results at some of the sites are reported preliminarily. We could not find the detailed velocity structure to bedrock, because small arrays for the microtremor observation were applied. However, significant structures are observed for shallow velocity structure at some sites. Furthermore, gravity data provided Bouguer anomaly, which is one of gravity anomalies, around the target area. From the Bouguer anomaly, area with low anomaly is found around the south-eastern area of the fault plane.

关键词：地面结构宫城浅层速度结构震源区布格重力异常重力测量东南部地区结构估计

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Fracture of ossified Achilles tendons:A review of cases

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World Journal of Orthopedics 2021年第4期12卷 207-213页

作者： Hisatoshi Ishikura Naoshi Fukui Mitsuyasu Iwasawa Satoru Ohashi Takeyuki Tanaka Sakae Tanaka Department of Orthopedic Surgery University of TokyoTokyo 113-8655Bunkyo-kuJapan Department of Orthopedic Surgery National Hospital OrganizationSagamihara HospitalSagamihara 252-0392Kanagawa PrefectureJapan

Fracture of an ossification of the Achilles tendon(OAT)is a rare entity,and its etiology,pathology,and treatment remain *** reviewed and scrutinized 18 cases(16 articles)of the fracture of an *** most common etiologies of the ossifications include previous surgery and *** fractures often occur without any trigger or with minimal *** long,>5 cm,ossification in the body of the Achilles tendon may have a higher risk of *** OAT itself is often asymptomatic;however,its fracture causes severe local pain,swelling,and weakness of plantar flexion,which forces patients to undergo aggressive *** the treatments of the fractures,nonoperative treatment by immobilizing ankle joint could be an option for elderly ***,because it often cannot produce satisfactory results in younger patients,surgical treatment is typically *** of the fractured mass and repairing the tendon is applicable if the remnant is *** there is a defect after the excision,reconstruction with autologous grafts or adjacent tendon transfer is *** fascia turndown flap,hamstring tendon and tensor fascia lata are used as autologous grafts,whereas peroneus brevis and flexor hallucis longus tendons are used for the tendon *** the fracture of an OAT is treated properly,the functional result will be satisfactory.

关键词： Achilles tendon Ossification Fracture Tissue grafting Tendon transfer Treatment

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Development of Detailed Micro-Land Form Database and Its Application to Site Amplification Characteristics in kanagawa prefecture, Japan

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Journal of Geographic Information System 2019年第1期11卷 66-81页

作者： Tsutomu Ochiai Takahisa Enomoto Kozo Keikaku Engineering Inc. Tokyo Japan kanagawa University Kanagawa Japan

Structural characteristic of surface soil ground has great effect on the ground motion amplitude when earthquake happens. Recent studies in Japan on seismic zonings use a database that covers entire Japan with 1 km mesh size, which is useful for prefecture scale researches. However, it is hard, even with 500 m or 250 m mesh sizes to consider a city, a county or award as scale studies. kanagawa prefecture is highly urbanized and vulnerable to seismic disaster. The prefecture suffered a wide spread damage during the 1923 Kanto earthquake. In this paper, we deploy a very fine mesh 50 × 50 m mesh to develop a general seismic intensity map useful for micro scale disaster management for local governments and educational information for earthquake preparedness promotion. In this paper, first we prepared two detailed databases for 50 × 50 m mesh size over entire kanagawa prefecture. One was for geologic formations and the other the geomorphologic condition. Then these databases were used for preparation of high-resolution digital soil classification maps for 15 categories of micro landforms of prefecture. The later database was used for mapping the site amplification factors for 50 × 50 m mesh by applying the empirical relations for AVS30. We could create a GIS platform with sufficient accuracy to consider potential risk analysis.

关键词： Micro-Landform GIS Site Response Site Amplification Factor Geologic Database Geomorphologic Database

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