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This study explored the attributes of the fashion specialty store according to the level of fashion involvement. Data were obtained from 262 female college student. For analysis of the data, conjoint analysis, T-test, factor analysis were employed. The results of this study were as follows; 1) Fashion involvement could be used as an importants segment variable and that attitude toward store attributes differed by the level of fashion involvement. 2) The high fashion involvement group preferred a downtown area in location, high fashion in fashionability and fashion couture quality in terms of product quality. On the other hand, the low involvement group preferred a residential area in location, basic staple goods in fashionability, and easy to care clothes in terms of product quality. 3) Five store attributes were grouped into two attribute groups: merchandising function (including product quality, assortment and fashionability) and store atmospheric function (including location and atmosphere). The results showed that the high fashion involvement group placed more importance on the store atmospheric function rather than the merchadising function. For the low fashion involvement group, the importance was reversed.
This study was intended to examine the effect of consumer materialism, price and point-of-purchase advertisements on consumer preference and purchasing intention with respect to discount jeans. Information for the study was obtained through the use of an experimental design which was 2×(2×3) mixed factorial design. The subjects were two hundred and seventy college male and female students. The data were analysed with factor analysis, ANOVA by using the SAS program. The main results were as follows: First, the results indicated that the 3-way interaction effects among materialism, price and point-of-purchase advertisements on consumer preference. Second, the results showed the 2-way interaction effects between materialism and price between materialism and price on consumers purchasing behavior. These results indicated that materialism have not direct effect on consumers purchasing behavior but significant influence under those condition in which price effect occurs. And different from other point-of-purchase advertisements, power words advertisements show negative effects on consumer preference in case of low price jeans, having no connection with materialism level.
The effective removal of sewage sludge is very important, due to a lot of generation, environmental harmful effects. This study was carried out to be reduction of sewage sludge. We have observed that higher removal efficiency ozone oxidation mechanism with acid condition add the metal catalyst better than alkali treatment. Also ozone oxidation mechanism with acid condition add the metal catalyst improvement of dewaterability of sewage sludge.
Along with the growth of Blockchain, DApp (Distributed Application) is getting attention. As interest in DApp grows, market size continues to grow and many developers participate in development. Many developers are using API(Application Programming Interface) services to mediate Blockchain nodes, such as Infura, for DApp development. However, when using such a service, there is a serious risk that the API service operator can violate the user's privacy by 1 to 1 matching the account address of the Transaction executed by the DApp user with the IP address of the DApp user. It can have an adverse effect on the reliability of public Blockchains that need to provide users with a secure DApp service environment. The proposed Blockchain platform is expected to provide user privacy protection from API services and provide a reliable DApp use environment that existing Blockchain platforms did not provide. It is also expected to help to activate DApp and increase the number of DApp users, which has not been activated due to the risk of an existing privacy breach. 블록체인의 성장과 함께 이를 기반으로한 DApp(Distributed Application)이 주목받고 있다. DApp에 대한 관심이 커짐에 따라 시장규모가 지속적으로 성장하고 있고 개발에 참여하는 개발자들이 늘어나고 있다. 많은 개발자들이 DApp 개발환경 구축의 어려움으로인해 Infura와 같이 블록체인 노드를 중개해주는 API(Application Programming Inteface) 서비스를 이용하고 있지만, 중개 API 서비스를이용할 경우 API 서비스 운영자는 DApp 사용자로부터 전달받은 트랜잭션의 계좌 주소와 DApp 사용자의 IP 주소의 1:1 매칭을 통해사용자의 프라이버시를 침해할 수 있는 심각한 위험이 존재한다. 따라서, 본 논문에서는 기존 노드 탐색 프로토콜의 활용과 이를 이용한 암호화를 통해 사용자의 프라이버시를 보호할 수 있는 공개형 블록체인 플랫폼 구조 강화방안을 제안한다. 제안하는 구조를통해 DApp 사용자는 API 서비스 운영자가 자신의 개인정보를 식별하지 못하게 방지함으로써 프라이버시를 보호할 수 있다. 기존의공개형 블록체인 플랫폼들이 제공해주지 못했던 신뢰성 있는 DApp 사용 환경을 제공해줌으로써 프라이버시 침해 위험으로 인해 활성화되지 못하였던 DApp의 활성화와 사용자의 증가에 기여할 수 있을 것으로 기대된다.
FISH (Fluorescence in situ Hybridization) technique was applied to the several nitrifiers in the bulk solution and on the Cilium media to promote nitrification process. It was confirmed by the results of Nso190 and NEU image analysis that ammonia oxidizer forms 'cluster' when they appears in both bulk and media. Another significant fact was that lots of microbial flocs were observed on the surface of the Cilium media substratum instead of biofilm. And from the results of NEU, it was known that Nitrosomonas europaea, Nitrosomonas eutopha and Nitrococcus mobilis or one or two of these three were the dominant ammonia oxidizers. The fact that no Nitrobacter sp. was detected with NIT3 probe means naturally that nitrite oxidizer in the nitrification reactor was not composed of Nitrobacter sp. but with other nitrite oxidizers like Nitrospira sp. etc. In order to detect these nitrite oxidizers, suitable probes must be tested.
An experimental study was conducted to investigate the effects of chlorine dioxide and ozone on reduction of THM(trihalomethane) formation. Precursor concentration, chlorine concentration, reaction time, pH, and temperature were governing compornents of THM formation. When other conditions are constant, THM formation increased linearly with precursor concentration increased. THM formation increased when pH increased from 5 to 9. In combined treatment with chlorine and chlorine dioxide, chlorine treatment after chlorine dioxide treatment made less THM than any other case does. Ozonation reduced THMFP(THM formation potential) of THM precursor. THMFP decreased exponentially with reaction time increased. Also biodegradability of humic acid was enhanced by ozonation.
The objective of this study was to examine the effects of solid concentrations of influent on the removal efficiency of organic matter and nitrate and on the biological kinetic coefficients. Each set of experiments consists of three bench scale anoxic reactors which were operated under different SRT to determine the biological kinetic coefficients and the optimum operating conditions for COD and nitrate removal. In anoxic reactors operated with 18hr of HRT, with the organic loading ranging 2.81∼4.70㎏TCODcr/㎥/day and TSS loading ranging 0.40∼2.49㎏TSS/㎥/day the removal efficiency of TCOD_(cr) and SCOD_(cr) were in the range of about 72∼83% and 62∼85%, respectively. Influent TSS concentration affects the removal efficiency of organic matter and nitrate. With high influent TSS concentration, COD removal efficiency was decreased and nitrate efficiency was increased slightly. To improve the removal efficiency of nitrate. HRT should be increased properly to extend the reaction time of denitrifying microorganism. SRT does not affect the COD removal efficiency and sludge settling characteristic. COD requirement for NO₃^--N removal was ranged from 2.19 to 3.34㎎SCOD_(cr)/㎎NO₃^-N_((Removed)), and was influenced by the influent TSS. Specific denitrification rates were ranged from 0.08 to 0.15㎎N/㎎MLVSS/day. Biological kinetic coefficients Y-t and K-d value of reactor Run-1 which received influent of high TSS concentration were 2.19㎎MLVSS/㎎COD_(cr) and 0.29day^(-1). These coefficients decreased to 0.50㎎MLVSS/㎎COD_(cr) and 0.l0day^(-1) for reactor Run-2 which received influent of low TSS concentration.