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Development of design system for crack patterns on cup surface based on KANSEI
Mai Misaka,Hideki Aoyama 한국CDE학회 2018 Journal of computational design and engineering Vol.5 No.4
With the development of manufacturing technology in recent years, as well as with the industrial product development, differentiation in the design aspect is becoming effective, not in terms of performance or quality. In addition, as consumers seek products that match their own sensibilities (KANSEI), designers are required to propose designs that highly conform to concept presented by client, while understanding the KANSEI of diversified consumers; therefore, their burden is increasing. To address these issues, the support of the development of computer-aided design has advanced; however, it is difficult to reflect human KANSEI or to generate a design that induces a natural impression through computers. The purpose of this research is to develop a system that incorporates the KANSEI of users, and emits a pattern design that induces a natural impression using a computer. This work is focused on crack patterns that can be observed on pottery surfaces, and a method for generating crack patterns on a cup surface is suggested. In this study, a Bézier curved surface and fluctuation were employed in order to induce a nat-ural impression. In addition, by using the neural network, the crack patterns were associated with user KANSEI. The neural network was composed of three layers, namely the input layer, the hidden layer, and the output layer; it adopted the sigmoid function as the transition function and the back propagation as the learning method. As a result, a system was constructed, in which a crack pattern that satisfied the input produces an output according to the desired impression of the user.
Synthesis and characterization of functional linear aliphatic diblock copolyethers platform
권원상,노예철,Kensuke Kamoshida,권경호,정윤철,김종현,Hideki Misaka,신태주,김제한,김광우,진경식,정정운,김경태,김미희,정성민,김영용,위동우,이진석,송성진,김창섭,이종찬,Nguyen Thi Phuong Thu,김용진,손보경,이윤철,Graniel Harne A. Abrenica,장태현,김희수,Toshifumi Satoh,Toyoji K 한국고분자학회 2013 한국고분자학회 학술대회 연구논문 초록집 Vol.2013 No.4
Kwon, Wonsang,Rho, Yecheol,Kamoshida, Kensuke,Kwon, Kyung Ho,Jeong, Youn Cheol,Kim, Jonghyun,Misaka, Hideki,Shin, Tae Joo,Kim, Jehan,Kim, Kwang‐,Woo,Jin, Kyeong Sik,Chang, Taihyun,Kim, Heesoo,Sa WILEY‐VCH Verlag 2012 Advanced Functional Materials Vol.22 No.24
<P><B>Abstract</B></P><P>Low‐temperature anionic ring‐opening homopolymerizations and copolymerizations of two glycidol derivatives (allyl glycidyl ether (AGE) and ethoxyethyl glycidyl ether (EEGE)) are studied using a metal‐free catalyst system, 3‐phenyl‐1‐propanol (PPA) (an initiator) and 1‐<I>tert</I>‐butyl‐4,4,4‐tris(dimethylamino)‐2,2‐bis[tris‐(dimethylamino)phosphoranylidenamino]‐2Λ<SUP>5</SUP>,4Λ<SUP>5</SUP>‐catenadi(phosphazene) (<I>t</I>‐Bu‐P<SUB>4</SUB>) (a promoter) in order to obtain well‐defined functional linear polyethers and diblock copolymers. With the aid of the catalyst system, AGE is found to successfully undergo anionic ring‐opening polymerization (ROP) even at room temperature (low reaction temperature) without any side reactions, producing well‐defined linear AGE‐homopolymer in a unimodal narrow molecular weight distribution. Under the same conditions, EEGE also undergoes polymerization, producing a linear EEGE‐homopolymer in a unimodal narrow molecular‐weight distribution. In this case, however, a side reaction (i.e., chain‐transfer reaction) is found to occur at low levels during the early stages of polymerization. The chemical properties of the monomers in the context of the homopolymerization reactions are considered in the design of a protocol used to synthesize well‐defined linear diblock copolyethers with a variety of compositions. The approach, anionic polymerization via the sequential step feed of AGE and EEGE as the first and second monomers, is found to be free from side reactions at room temperature. Each block of the obtained linear diblock copolymers undergoes selective deprotection to permit further chemical modification for selective functionalization. In addition, thermal properties and structures of the polymers and their post‐modification products are examined. Overall, this study demonstrates that a low‐temperature metal‐free anionic ROP using the PPA/<I>t</I>‐Bu‐P<SUB>4</SUB> catalyst system is suitable for the production of well‐defined linear AGE‐homopolymers and their diblock copolymers with the EEGE monomer, which are versatile and selectively functionalizable linear aliphatic polyether platforms for a variety of post‐modifications, nanostructures, and their applications.</P>