반응성 상용화제를 포함한 고분자 블렌드의 상형태 및 계면현상

Docto

병렬기계의 일전계획을 위한 정수 최대흐름 모형에 관한 연구

Maste

非同期 MC-CDMA 시스템에서의 逆方向 채널 프레임 同期方式에 關한 硏究

학위논문(석사)--서울대학교 대학원 :전기공학부,2000.Maste

Poly(ethyl acrylate) poly(methyl methacrylate) semi-II IPN의 동적 물성 및 상형태

Maste

Lempel-Cohn-Eastman 시퀀스의 트레이스 표현 및 낮은 상관값을 갖는 새로운 이진 시퀀스군

Thesis (doctoral)--서울대학교 대학원 :전기·컴퓨터공학부,2004.Docto

가소제 첨가제가 고분자 반도체 물질의 기계적 성능에 미치는 영향에 관한 연구

MasterThe study of deformable organic semiconductor materials has been in the spotlight in the next generation of flexible device technologies. In particular, organic semiconductor materials can take advantage of being lightweight, deformable, and capable of large-area processing as a solution process itself, compared to silicon and metal-based technologies that are currently available in commercial devices. A deformable and stretchable material must satisfy not only a certain level of electrical performance but also various mechanical properties. Since it has to withstand mechanical forces in the tensile or compression direction, it is desired to implement a material system with good tensile toughness. In this study, a plasticizer additive is blended with a highly crystalline donor-acceptor type polymer with excellent electrical performance to significantly improve mechanical tensile stretchability while ensuring electrical mobility. And the cause of mechanical change is to be analyzed by various methods such as morphology, crystallinity analysis, and thermodynamic analysis. In addition, we would like to find a way to minimize electrical performance degradation in tensile situation by manufacturing stretchable Organic field-effect transistors (OFETs). In Chapter 2, the first half of the study, we set up a measurement capable of the tensile properties of nanoscale thickness of polymer thin film, and conducted experiments on the process for data validity. In Chapter 3, using phthalate-based plasticizers, the tensile performance of the highly-crystalline conjugate polymer DPP-DTT blend film was increased by more than 10%. Then, the cause is to be found by suggesting molecular behavior in tensile situation, through the stress-strain curve according to the plasticizer content, crystallinity analysis, and thermodynamic analysis

An Analysis of Chinese Consumers Preference on Rose

Purpose - In Chinese rose market, Korea competes against Latin American and African countries, but is not so competitive in terms of price and quality, implying the importance of using appropriate marketing strategies. This study aims to examine Chinese rose consumers recognition and attributes of preference for roses produced in Korea, in order to use the result as baseline data for Korean rose exporters to China and provide implications that help establish a variety of marketing strategies targeting each region, income and age group. Research Design, Data and Methodology - 112 Chinese people were involved and interviewed in Chinese horticulture industry who had participated in 2016 Hortiflorexpo IPM Beijing. Online questionnaire survey was additionally conducted with 533 Chinese living in Korea and China. The Conjoint Analysis was conducted for region, age, and income group of respondents to estimate the relative importance of rose attributes evaluated by each population group and the utility derived from each attribute level. This process aimed to compare respective population groups for the relative importance and utility to derive implications for targeted marketing strategies. Results - The analysis finds that Chinese rose consumers prioritize rose color, followed by price, flowering stage, and flower size in purchasing roses. They prefer red roses most, followed by pink and then yellow. Moreover, they prefer larger roses, and relatively cheaper roses. The analysis reveals they prefer roses in their 20%-flowering stage to more than 40%-flowering stage. Conclusions - Establishing marketing strategies differentiated for each Chinese consumer group is critical in expanding Korean rose export. The analysis finds while Chinese consumers living in Beijing considered rose color and flowering stage more importantly than their counterparts in Shanghai, Chinese consumers living in Shanghai considered rose price and size more importantly than their counterparts living in Beijing. Therefore, establishing marketing strategies based on these attributes of preference in each region is necessary. Mid & low-income consumer groups considered price as the most important factor, and high-income consumer groups considered rose color as the most important one. It is, thus, important to focus on rose color when establishing a marketing strategy with targeting the high-income consumer group.Y

An Analysis of Determinants for Korean Spray Rose Purchase in China

In order to export Korean spray roses to the China, it is needed to analyse chinese preferences, rose attributes, and purchase intentions. The purpose of this study is to present the implications on the production and distribution of roses for export by analyzing the quality preference attributes and purchase intention of Korean rose for Chinese flower experts. A survey on the preference and purchase intention of Korean flower roses by Chinese flower experts was conducted through face - to - face interviews with flower show participants in China. Approximately 100 Chinese flower experts who participated in the Flower Show in 2016 received the questionnaire, and 86 survey results could be used for analysis. Survey data were analyzed using ordered probit and bivariate probit models. As a result of an analysis, it was found that Chinese flower experts were more likely to buy Korean roses than Chinese roses even if they consider flower color, leaf shape and size and color diversity. The probability of purchasing more than twice the price was higher than that of the color diversity considering the flower shape, leaf shape and size, but the bivariate order probit model was larger than that of flowers, leaves and size, and the order of probability size was changed. In order to increase the export of Korean spray roses to the Chinese market, We need to increase Chinese experts preferences and satisfaction. For this purpose, it is very important to develop export varieties of roses with large flower buds and shape / coloring, and to apply the useful post-harvest technology that can extend freshness and distribution period of export roses.N