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- 저자 : Minami Kimura (검색결과 3 건)
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Development of CFRP Chain Sprocket
Minami Kimura 한국소성가공학회 2018 플라스틱가공 심포지엄(한일 공동 세미나) Vol.2018 No.8
It was tried for light weighting by a board made of CFRP that I made a gear with cutting, but an addendum has been damaged without a carbon fiber being able to tolerate shear stress. The authors developed a method to prevent the damage of the addendum part by orienting a carbon short fibers bunch in a fan type along the shape of the addendum. Using the carbon short fibers bunch of 6mm - 10mm in length, CFRP Chan sprocket was produced experimentally using a silicone gum mold at 22 ℃±1 ℃ in the draft chamber in 24h. The Chan sprocket made of provided CFRP was light weighted, and, as for the weight, it was to half of 110g in weight of the product made in A7075 extra super duralumin Chan sprocket with 54 g. CFRP Chan sprocket (the outside) and Chan sprocket (the inside) made of A7075 extra super duralumin were attached to a bicycle, and the output was measured by a pedal type power meter. A run examination of 3000km and 5000km was conducted about perfect circle CFRP chain sprocket and oval CFRP chain sprocket each. As many teeth bore the Chan tension with the CFRP Chan sprocket for the bicycle, the run with the low power was enabled by the gear ratio that there were very few bottom dead center sections and was high.
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( Satoshi Yamada ),( Takuya Yoshino ),( Minoru Matsuura ),( Masamichi Kimura ),( Yorimitsu Koshikawa ),( Naoki Minami ),( Takahiko Toyonaga ),( Yusuke Honzawa ),( Hiroshi Nakase ) 대한장연구학회 2015 Intestinal Research Vol.13 No.3
Background/Aims: The long-term clinical outcomes of patients with bio-naive ulcerative colitis (UC) who maintain remission with thiopurine are unclear. The aim of this study was to assess the long-term efficacy and safety of maintenance treatment with thiopurine in UC patients. Methods: This was a retrospective observational cohort analysis conducted at a single center. Between December 1998 and August 2013, 59 of 87 patients with bio-naive UC who achieved remission after induction with treatments other than biologics were enrolled. Remission maintenance with thiopurine was defined as no concomitant treatment needed other than 5-aminosalicylate without relapse. We assessed the remissionmaintenance rate, mucosal healing rate, colectomy-free rate, and treatment safety in UC patients who received thiopurineas maintenance treatment. Results: The 84-month cumulative remission-maintenance and colectomy-free survival rates in the UC patients who were receiving maintenance treatment with thiopurine and 5-aminosalicylate were 43.9% and 88.0%, respectively. Of the 38 patients who underwent colonoscopy during thiopurine maintenance treatment, 23 (60.5%) achieved mucosal healing. Of the 59 patients who achieved clinical remission with thiopurine, 6 patients (10.2%) discontinued the thiopurine therapy because of adverse events. Conclusions: Our study demonstrates the long-term efficacy and safety of thiopurine treatment in patients with bio-naive UC. (Intest Res 2015;13:250-258)
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( Takuya Yoshino ),( Minoru Matsuura ),( Naoki Minami ),( Satoshi Yamada ),( Yusuke Honzawa ),( Masamichi Kimura ),( Yorimitsu Koshikawa ),( Ali Madian ),( Takahiko Toyonaga ),( Hiroshi Nakase ) 대한장연구학회 2015 Intestinal Research Vol.13 No.3
Background/Aims: Early use of biologics in patients with Crohn`s disease (CD) improves quality of life. However, the effects of the early use of immunomodulators on long-term outcomes remain unclear. This study aimed to evaluate the effects of immunomodulatorsin patients with CD. Methods: Between January 2004 and December 2011, 47 biologic-naive CD patients treated with thiopurines alone for remission maintenance were analyzed. The patients were classified into 2 groups depending on the presence or absence of digestive complications. We evaluated the efficacy of and predictive factors for thiopurine use for remission maintenance. Results: The cumulative relapse rates at 24 and 60 months were 13.7% and 35.4%, respectively. Regarding patient characteristics, there was a significant difference in patient history of surgery between the non-relapse and relapse groups (P =0.021). The cumulative relapse rate was lower in patients without a history of surgery than in those with such a history (27.2% and 52.9% at 60.0 months, respectively). Multivariate analysis suggested that the prevalence of stricturing and penetrating complications is an independent factor for relapse. The cumulative relapse rate in patients without a history ofsurgery was significantly lower in the non-stricturing and non-penetrating group than in the stricturing and penetrating group (11.8% at 85.0 months vs. 58.5% at 69.0 months; P =0.036). Conclusions: Thiopurine use might be beneficial for the long-term maintenance of remission in biologic-naive Crohn`s disease patients without digestive complications and a history of surgery. (Intest Res 2015;13:266-273)
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