Takashi Koga

STUDY ON LIMIT STATES AND RATIONALIZATION OF DESIGN BASED ON HYDRAULIC PRESSURE TEST IN SMALL FRP HYDRAULIC GATES

Hitoshi NAKAMURA, Kunitomo Sugiura, Hideki HIBI, Takashi Koga

FRP水門扉は，設計基準に準拠して許容応力度，たわみ度に基づいて設計・照査されるが，実構造物を対象とした安全性，使用性に関する限界状態は十分に議論されていない．本研究では，小形FRP水門扉の構造特性の把握と合理的な設計法の構築を目的として，現行設計に基づいた2種類の小形FRP水門扉および小形鋼製水門扉を対象に，破壊に至るまでの水圧実験を行って，限界状態を把握するとともに，FEM解析により，設計水圧に対する合理的な断面の検討を行った．検討の結果，設計されたFRP水門扉は，たわみ度が設計に支配的であるが，十分に安全で余裕があることから，合理化できる可能性があること，また，たわみ度を満足する最小部材高さを検討した結果，部材高さをより小さくできることがわかった．

SHORT TIME METHODS FOR FIELD MEASUREMENT OF SOUND INSULATION BETWEEN ROOMS

Jin YOSHIMURA, Kei Andow, Takashi Koga

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Morphology and Thermoelectric Properties of Mg3+δSb2 Foams Manufactured Using Combustion Synthesis

Takashi Koga, Takashi Itoh

Magnesium antimonide (Mg3Sb2) is a promising thermoelectric compound utilized for thermoelectric power generation. We have found out that the Mg3Sb2 compound can be made from Mg and Sb powder mixture via the combustion synthesizing reaction. In this study, we manufactured the compounds …

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Investigation of the Effectiveness of Infection Control Measures in the Dental Office

Saori Yumino, Takamasa Hasama, Koji Kondo, Takashi Koga et autres

Aerosol transmission is an important mode of COVID-19 (SARS-CoV-2) infection. Dentists and dental hygienists, who provide medical treatment and care in the oral cavity, may be exposed to expiratory aerosols of asymptomatic infected persons. To compare the effectiveness of devices in reducing …

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Morphology and Thermoelectric Properties of Mg3+δSb2 Foams Manufactured Using Combustion Synthesis

Takashi Koga, Takashi Itoh

Magnesium antimonide (Mg3Sb2) is a promising thermoelectric compound utilized for thermoelectric power generation. We have found out that the Mg3Sb2 compound can be made from Mg and Sb powder mixture via the combustion synthesizing reaction. In this study, we manufactured the compounds …

jp (code pays fourni par la source)

Applicability of 15% Cr and 17% Cr Martensite-Based Stainless Steel OCTG Materials for Seawater Injection Service

Yasuhide Ishiguro, Yuichi Kamo, Yusuke Mizuno, Tsuyoshi Yoneyama et autres

Abstract This paper reports the applicability of 15% Cr-added (15-6-3-Cu-based; UNS No. S42625) and 17% Cr-added (17-4.5-3-Cu-W-based; UNS No. S42825) martensite-based stainless steel OCTG materials for seawater injection service. It is known that GRP (Glass-fiber Reinforced Plastic) lined carbon steel, 1% Cr-based …

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Seeking the Crossroads Where the Issues on Access to Government Information, Digital Archives and Professional Education Meet: A Review on iSchool Courses at Two Universities in North America

Takashi Koga

Evaluation of morphological and thermoelectric properties of Mg 3 Sb 2 foamed by combustion synthesis

Takashi Koga, Takashi Itoh

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Evaluation of the wound healing process in rat skin using a hexanoyl group‐modified alkaline‐treated gelatin porous film

Takashi Koga, Toshiro Kibe, Tsunemasa Taguchi, Takao Fuchigami et autres

Abstract The present study investigated the wound healing process in a rat skin wound model dressed with a hexanoyl group‐modified alkaline‐treated gelatin porous (HxAlGltn) film with angiogenesis‐inducing and strong bioadhesive properties or a collagen sponge (CS). A circular 10‐mm full‐thickness skin defect …

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Tumor neuroendócrino de íleo com metástase ovariana: um relato de caso

Takashi Koga, L.M. da Silva, MRMB Silva, I.J.F.C. Netto et autres

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Tuberculose intestinal e peritoneal: relato de caso

Takashi Koga, V.B.E. Dib, Gabriela Fonseca Lopes, I.J.F.C. Netto et autres

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Clinical statistical observations on patients with primary cleft lip, cleft palate, or both during 30 years in our department

Toshiro Kibe, Kazuhide Nishihara, Takao Fuchigami, Kozo Matsumoto et autres

This study analyzed 1,100 patients with primary cleft lip, cleft palate, or both who visited our specialized outpatient department during the 30-year period between 1981 and 2011.

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