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Uesugi, Tokuteru,Kawasaki, Megumi,Ninomiya, Masaki,Kamiya, Yuhei,Takigawa, Yorinobu,Higashi, Kenji Elsevier 2015 Materials science & engineering. properties, micro Vol.645 No.-
<P><B>Abstract</B></P> <P>Recent numerous studies demonstrated the advantages of producing bulk metals with submicrometer grain sizes which provide the opportunity to demonstrate improved mechanical characteristics including superplastic properties. Besides the effort, although the impurity may cause low ductility due to grain boundary segregation, there are limited studies to date on the influence of general impurities upon flow behavior of conventional superplastic materials. Accordingly, the present report demonstrates the significance of Si impurity on superplastic properties in an ultrafine-grained high-purity Zn-22%Al eutectoid alloy at room temperature. The alloy was prepared to include different levels of Si contents up to 1500ppm in the high-purity alloy and the consistent fine grain sizes of ~0.60µm were introduced through a series of solutionizing followed by cold rolling. Tensile testing showed an occurrence of excellent room-temperature superplasticity and the maximum elongation of 500% was recorded at an optimal superplastic strain rate of 1.0×10<SUP>−3</SUP> s<SUP>−1</SUP> in the alloy with less Si. Increasing Si contents reduced ductility without changing the strain rate sensitivity, thereby implying the consistency in the deformation mechanism for superplastic flow but the difference in the fracture mode. The present analysis estimates a threshold stress and demonstrate the validity of applying the conventional superplastic relationship for depicting the room-temperature superplastic flow in the high-purity Zn-22%Al alloy. Moreover, the separate fracture modes are proposed for the alloy with increasing Si impurity contents by taking fractographs after superplastic elongations.</P>
上杉智英(Uesugi, Tomofusa) 동국대학교 불교문화연구원 2021 佛敎學報 Vol.- No.94
현재 일본에서는 대정신수대장경(⼤正新修⼤藏經)에 수록된 법장(法藏) 『기신론의기(起信論義記)』를 표준 텍스트로 연구하고 있다. 이 대정장본 텍스트의 저본은 원록(元禄) 12년 간본이며, 대교본은 『대일본속장경(⼤日本續藏經)』본인데, 이 대일본속장경본은 중국 양원훼이(楊文會)가 경안(慶安) 4년판을 교정한 텍스트이다. 그러한 사실은 대정장본에 채록된 『대일본속장경(⼤日本續藏經)』과의 교이를 경안(慶安) 4년판과 비교해서 얻을 수 있는 결과이다. 한편 이 에도시대 판본에 기초하여 유통되는 표준 텍스트보다 원본에 가깝다고 생각되는 가마쿠라(鎌倉)시대의 고사본 및 고간본 6점의 개요를 소개하여 그것으로부터 일본에서의 법장 『기신론소』의 고형 및 유전의 일단을 밝혔다. 각각 고산사(⾼山寺), 존승원(尊勝院), 가나자와문고(⾦澤文庫), 미노부문고(身延文庫), 구미전사(久米田寺). 금강사(⾦剛寺)에 유전되는 사본과 판본들이다. 이들 중 고산사 사본은 현존하는 『대승기신론의기』 가운데 가장 오래된 것이며, 가나자와 문고본과 미노부문고본은 『법장소』 최초의 판본을 전해주는 중요한 자료이다. 또 구미전사 및 금강사의 사본은 법장의 『기신론소』가 2권에서 3권으로 변해가는 과정을 밝혀준다는 점에서 각각 중요하다. 이러한 정보들이 현재 진행하고 있는 『법장소』의 교감에 도움이 되길 기대한다. In Japan, the authoritative text of Fazang’s Notes on the Meaning of the Treatise on Awakening Mahāyāna Faith ⼤乘起信論義記 (Dasheng qixinlun yiji; Jp. Daijō kishinron giki) is the version in the Taishō Tripiṭaka ⼤正新修⼤藏經 (Taishō shinshū Daizōkyō). Its original text (teihon) is a printed edition dated 1699 (Genroku 12), with annotations (kōhon) drawn from another woodblock-printed edition published in 1651 (Keian 4). There are, however, earlier versions of Dasheng qixinlun yiji in Japan, which are believed to be closer to the original Chinese text. This paper introduces an early handwritten manuscript and five woodblock-printed editions of Fazang’s Notes, all of which date back to the Kamakura period, and then attempts to clarify the form of this text in medieval Japan and the ways in which it changed over time. The six manuscript and woodblock-printed editions of Fazang’s Notes were inherited to the Kozanzi ⾼山寺, the Sonshoin 尊勝院, the Kanazawa Bunko ⾦澤文庫, the Minobu Bunko 身延文庫, the Kumedadera 久米田寺, and the Kongoji ⾦剛寺. They are very improtant texts. First, the Kozanzi’s text is the oldest manuscript of Fazang’s Notes existing in the world. Second, the texts of Kanazawa Bunko and Minobu Bunko are the first woodblock-printed editions of Fazang’s Notes. Third, the texts of Kumedadera and Kongoji show the process how the Fazang’s Notes changed from two to three volumes. I expect that these information from this study would help examine the Fazang’s Notes.
Shunsuke Uesugi,Toshihiro Imamura,Satoshi Kokai,Takashi Ono 대한치과교정학회 2018 대한치과교정학회지 Vol.48 No.3
For patients with bimaxillary protrusion, significant retraction and intrusion of the anterior teeth are sometimes essential to improve the facial profile. However, severe root resorption of the maxillary incisors occasionally occurs after treatment because of various factors. For instance, it has been reported that approximation or invasion of the incisive canal by the anterior tooth roots during retraction may cause apical root damage. Thus, determination of the position of the maxillary incisors is key for orthodontic diagnosis and treatment planning in such cases. Cone-beam computed tomography (CBCT) may be useful for simulating the post-treatment position of the maxillary incisors and surrounding structures in order to ensure safe teeth movement. Here, we present a case of Class II malocclusion with bimaxillary protrusion, wherein apical root damage due to treatment was minimized by pretreatment evaluation of the anatomical structures and simulation of the maxillary central incisor movement using CBCT. Considerable retraction and intrusion of the maxillary incisors, which resulted in a significant improvement in the facial profile and smile, were achieved without severe root resorption. Our findings suggest that CBCT-based diagnosis and treatment simulation may facilitate safe and dynamic orthodontic tooth movement, particularly in patients requiring maximum anterior tooth retraction.
Evaluating Security Sector Reform in Timor-Leste: The Triad Hybridity Nexuses
( Yuji Uesugi ) 서울대학교 통일평화연구원 2021 Asian Journal of Peacebuilding Vol.9 No.1
This paper provides a mid-term assessment of externally-led Security Sector Reform (SSR) during the United Nations (UN) led peacebuilding intervention in Timor-Leste. Despite initial difficulties, several core institutions, introduced by the UN, remain effective and were integrated into local practices. These initial security problems of the new-born Timor-Leste state, included the radical reconfiguration of the power balances within elites and an unfamiliarity with new approaches to security governance by the indigenous actors themselves. The lack of contextual knowledge and insensitivity to local political dynamics by external actors exacerbated these issues. Nonetheless, Timor-Leste has found ways to achieve some measure of political stability and physical security, both of which were always overarching goals of SSR.
Yoshimura Hideto,Tabuchi Ken,Uesugi Ryuji,Takahashi Akihiko 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
To understand the geographical differences between diapause systems and synchronization of adult occurrence in the soybean pod borer Leguminivora glycinivorella (Lepidoptera: Tortricidae), we examined the timing of winter diapause termination and intensity of summer diapause using univoltine and potentially bivoltine individuals in Iwate, Japan. In laboratory rearing experiments of mature larvae maintained at constant temperature (20 ◦ C), winter diapause intensity weakened by January without photoperiodic responses. Meanwhile, summer diapause was maintained by the long day length and presumably terminated with the photoperiodic transition from long to short day length. The intensity of summer diapause was stronger for cocoons that transitioned from a 16 h light to 8 h dark (LD 16:8) to a LD 15:9 photoperiod than for those that transitioned from LD 15:9 to LD 14:10. These results suggest that populations distributed in relatively low-latitude areas, with partly or potentially bivoltine individuals, would have a weaker summer diapause or none at all. Moreover, sexual differences in the number of days to emergence were not detected when individuals experienced a photoperiodic transition from long to short day length, suggesting that the summer diapause system may function to synchronize the emer gence of males and females in the population examined.