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学位授与大学：京都大学 ; 取得学位: 博士(工学) ; 学位授与年月日: 2007-09-25 ; 学位の種類: 新制・課程博士 ; 学位記番号: 工博第2861号 ; 請求記号: 新制/工/1420 ; 整理番号: 25546 / Introduction Precision manufacture of components has become a necessity in the present day manufacturing sectors. The ever-increasing demands of humankind have forced researchers to come up with more improved innovations in technology; achieving higher levels of integration in microprocessors, and creating more versatile and precision multitasking systems being just a few of the major drivers in this area. All these, however, have one rudimentary requirement, namely, the need to use very high precision components. Hence, it can be very safely concluded that the success of each of these industries hinges on the ability to produce such components. Recently, as the tremendous demands for mechanical parts with high geometric and dimensional accuracy increase, an exigency to produce those parts with such accuracy is greatly comprehended by today’s manufacturing industries. To this end, CNC machine tools are the most important means of production for the manufacturing industries. CNC machine tools have been widely applied to a range of applications, for example, in the aerospace industries. With the recent advancement of the machine tools manufacturing technologies including high speed feed drives and high speed spindles, high speed end milling on the CNC machine tools has become constantly popular, and is being performed to manufacture the components with the required contour geometry and dimensional accuracy. However, the geometric accuracy of the machined surface is greatly affected by the numerous errors sources ranging from errors existing in the machine tool system itself to the errors due to the cutting process. Figure 1-1 shows the general error sources that influence the machining geometric accuracy [Kakino et al., 1993]. Broadly, machining geometric errors are caused by two major error sources: motion errors of the machine tool system and errors due to the machining process. The key factors among error sources in the machine tool system that cause deviation of tool tip position relative to workpiece, and hence machining geometric errors are positioning errors and volumetric errors. Here, positioning errors are defined as the linear errors of the positioning mechanism, whose directions are in parallel with the direction of axis movement required for desired positioning. On the other hand, volumetric errors are here defined as error components whose directions are perpendicular to the direction of axis movement. / Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第13390号 / 工博第2861号 / 新制||工||1420(附属図書館) / 25546 / UT51-2007-Q791 / 京都大学大学院工学研究科精密工学専攻 / (主査)教授 松原 厚, 教授 吉村 允孝, 教授 松久 寛 / 学位規則第4条第1項該当

Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第15033号 / 工博第3182号 / 新制||工||1479(附属図書館) / 27494 / 京都大学大学院工学研究科マイクロエンジニアリング専攻 / (主査)教授 松原 厚, 教授 田畑 修, 教授 西脇 眞二 / 学位規則第4条第1項該当

京都大学 / 新制・課程博士 / 博士(工学) / 甲第23234号 / 工博第4878号 / 新制||工||1761(附属図書館) / 京都大学大学院工学研究科化学工学専攻 / (主査)教授 松坂 修二, 教授 宮原 稔, 教授 山本 量一 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

Comment définir ces peintures ou rondes-bosses que sont les portraits japonais figurant des moines ? Par leur forme spécifique qui, issue d’un prototype continental qui n’a pas été remis en question, est demeurée stable à l’exception de brèves périodes. Cette constance s’explique par l’importance accordée à la Chine, l’usage de modèles iconographiques (zuzō) et le recours à une réplique qui n’est jamais dénigrée. Le portrait est de plus une image au bénéfice des sectes qui la produisent. En fournissant une représentation qui ne se dégrade pas, il est aussi la preuve d’un état de sainteté, voire de bouddhéité. Quant à la fonction de certificat des portraits Zen (chinzō), elle semble rare. Portrait de groupe, rouleaux illustrés (emaki) et littérature ont également décrit des personnages à leur façon, autorisant des comparaisons. Le portrait aurait pu inventer sa propre représentation ; il a préféré emprunter aux images sacrées : figurations de vénérés, maṇḍala et illustrations de jātaka. / How can one define these paintings and sculptures in the round that make up Japanese portraits of monks? Through their specific form that derives from a continental prototype which has never been reappraised and which remained stable except for short periods of time. Such a consistency results from a strong influence of China, and from the use of iconographic models (zuzō). Furthermore, copying a work of art has never been undervalued. Portraits are also images which benefit the sect that produces them. By providing an image or representation that never decays, they bear testimony to a monk's holiness, even buddhahood. Lastly, the Zen portraits (chinzō) are often seen as a kind of certification; however, this function seems quite rare. Group portraits, scrolls (emaki) and literature also describe people in their own way, allowing comparison with portraits. Portraiture could have followed its own path; it has preferred to borrow from holy images: deities, maṇḍala and jātaka illustrations.

京都大学 / 新制・課程博士 / 博士(理学) / 甲第23050号 / 理博第4727号 / 新制||理||1677(附属図書館) / 京都大学大学院理学研究科生物科学専攻 / (主査)教授 高田 彰二, 教授 杤尾 豪人, 教授 望月 敦史 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DGAM

多様化する樹脂材料の射出成形において，目的に応じた溶融状態を得るための高度な可塑化技術が求められている．本研究では，流動シミュレーションを用いて可塑化現象を定量化し，所望の溶融状態に対する影響因子を明らかにすることでスクリュ形状を最適化し，実験検証により検討の妥当性を確認した．また，スクリュ形状を3Dプリンタによりプロトタイピングし，疑似流体を用いた可視化モデル実験を提案し，新規スクリュの開発手法としての有効性を示した． / In injection molding of diversified resins, it has been required advancement of plasticizing technology in order to realize a melting condition according to purpose. This study investigated quantifying phenomena by flow simulation, and optimizing the screw design by clarifying the influence factors for the desired melting condition. The effects of optimized screw were confirmed the validity of results by experimental validations. Also, models experiments of visualizing test that utilized simulated fluid and prototyped screw by 3D printer were proposed, there were indicated efficacy for the development approach of new screw design. / 博士(工学) / Doctor of Philosophy in Engineering / 同志社大学 / Doshisha University

京都大学 / 新制・課程博士 / 博士(工学) / 甲第23872号 / 工博第4959号 / 新制||工||1775(附属図書館) / 京都大学大学院工学研究科建築学専攻 / (主査)教授 大崎 純, 教授 竹脇 出, 教授 西山 峰広 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM