著者
古川 明彦 永井 未央 佐藤 裕子 大野 浩一 亀井 翼 眞柄 泰基 Rahman M. Hamidur
出版者
北海道大学衛生工学会
雑誌
衛生工学シンポジウム論文集
巻号頁・発行日
no.9, pp.238-241, 2001-11-01

第9回衛生工学シンポジウム(平成13年11月1日(木)-2日(金) 北海道大学学術交流会館) . 5 リスク評価と環境修復 . 5-4
著者
伊澤 光 古川 明 丸山 澄 堤 博文 小室 歳信
出版者
日本法科学技術学会
雑誌
日本法科学技術学会誌 (ISSN:18801323)
巻号頁・発行日
vol.24, no.1, pp.89-97, 2019 (Released:2019-01-31)
参考文献数
12

We experienced a case of successful identification of an unknown body found at breakwater based on root canal treatment. After matching the dental findings of the body to the treatment history of individual's dental records, 23 teeth showed agreement in findings. Although 8 teeth did not agree in findings, they were consistent in terms of dental treatment history. There was inconsistency in the remaining tooth. This tooth was determined as intact, but the dental records indicated the existence of a resin composite restoration on that tooth. However, that inconsistency never became a critical determinant factor. Comparison of periapical radiographs of the body with the dental records revealed that the right mandibular first premolar teeth showed considerable similarity to the images of a broken endodontic instrument and a alveolar bone resorption caused by the leakage of root canal sealer at the middle of the root. Given the above information, we concluded that the identification as the same individual is reasonable. It was thought that a case where the findings of a dental medical accident helped to confirm the identity was unusual.
著者
古川 明徳 曹 銀春 大熊 九州男 眺野 貴裕 渡邊 聡
出版者
一般社団法人日本機械学会
雑誌
日本機械学會論文集. B編 (ISSN:03875016)
巻号頁・発行日
vol.67, no.657, pp.1184-1190, 2001-05-25
被引用文献数
11

Demands for higher performance of axial flow pumps have led pump designers to consider the creative strategies for the new type. As a solution, contra-rotating rotors might be applied to a pump. Comparative experiments were conducted for two types, consisting of contra-rotating rotors and a rotor and a stator respectively, which were designed under the same specifications of pump head, flow rate and rotor specific speed. The measured pump performances and flow distributions are shown and the advantages of using contra-rotating type are clarlfied as follows. Contra-rotating type is superior in pump efficiency and cavitation performance in range of partial flow rates to conventional one though the specified pump head and maximum efficiency were not satisfied at design point in the case of contra-rotating test rotors. Results demonstrate that the rear rotor design is important to improve the pump efficiency.