著者

増淵 興一 小椋 陽 石原 芳忠 星野 二郎

出版者

The Japan Society of Naval Architects and Ocean Engineers

雑誌

造船協會論文集 (ISSN:18842062)

巻号頁・発行日

vol.1954, no.95, pp.161-171, 1954 (Released:2007-05-28)

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In case of constructing the welded steel ships, the wavy deformation of the shell plate is liable to occur by the fillet welding of shell plates and frames or floor plates.This unfairness may not only spoil the appearance of the shell plate but also reduce the buckling strength of it.This study was performed for the purpose of surveying the mechanism of origination and the method of reducing this deformation.The specimen used in this experiment is a constrained frame works as shown in Fig. 1. The deformation and the reaction stress originated in the plate due to welding were measured by the dial gauge and the electric resistance wire strain gauges respectively. These measurement were performed after the welding of each layer.The results obtained are summarized as follows:-1) Fundamental nature of this problemThis problem of residual stress can be treated as the problem of reaction stress originated by constraining the angular change due to welding. Accordingly, the angular change and the reaction stress can be calculated from the measured deformation using“beam theory.”2) Effect of welding procedures on the angular change(i) Weight of deposit metalAngular change due to welding increases as the increase of the weight of the deposit metal. There approximately exists a linear relation between the logarithm of the weight of the rod consumption and the angular change. Accordingly, it seems to be a benefit-able practice for reducing the deformation and reaction stress to decrease the weight of deposit metal or the leg length.(ii) Effect of rod diameterSize of rod diameter seems to have little effect on the angular change when the weight of deposit metal is equal.(iii) Effect of the degree of constraintDegree of constraint seems to have a remarkable effect on the angular change.Accordingly, the additional constraint, such as a kind of strong backs, attached to the shell plate may reduce the deformation and reaction stress.

著者

末田 武 星野 二郎 山村 准男

出版者

JAPANESE SOCIETY OF PERIODONTOLOGY

雑誌

日本歯周病学会会誌 (ISSN:03850110)

巻号頁・発行日

vol.46, no.2, pp.152-160, 2004-06-28

被引用文献数

9 3

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エムドゲイン^®の輸入販売元である生化学工業株式会社がわが国の再審査制度に基づき, エムドゲイン^®の市販後の日常診療における安全性および有効性を確認する目的で, 3年間にわたり市販後使用成績調査を実施した結果をまとめた。<br>歯科大学および歯学部の附属病院を含む全国171施設で行った956症例を対象に解析した。調査をエムドゲイン^®を使用した手術の術前と術後8カ月目に行い, 有害事象の有無, 歯周ポケットの深さの増減, プロービング時の出血の改善, 歯の動揺の改善, クリニカルアタッチメントレベルの増減, 骨欠損の改善, 根分岐部病変の改善, 総合改善度について評価した。<br>エムドゲイン^®に起因する副作用は報告されなかった。術後8カ月の時点で歯周ポケットの深さの減少 (約4mm), プロービング時の出血の減小, 歯の動揺の改善, クリニカルアタッチメントレベルのゲイン, 骨欠損の改善, 根分岐部病変の改善, 総合改善度の改善が認められた。<br>エムドゲイン^®は歯周組織再生に対して安全で有用な医療材料であることが確認できた。