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스포츠 웹사이트의 정보품질과 서비스품질을 통한 플로우 경험이 재방문의도에 미치는 영향에 관한 연구
이용균(Young Kyun Lee),양춘호(Chun Ho Yang) 한국사회체육학회 2009 한국사회체육학회지 Vol.0 No.37
This is an empirical study about people`s online experience while visiting sport websites. The focus of this study was to examine how flow experience is related to the information quality and the service quality of sport websites to stimulate users` interest in using sport websites. A flow model which incorporates the relationships among major variables was proposed. The major variables encompass information quality, service quality, flow, commitment, satisfaction, and revisitation intention. The results from a study of 357 respondents revealed that information quality and service quality were two indicators of flow experience. Flow experience was closely related to users` commitment and satisfaction. And sport website-users` commitment and satisfaction affected user`s revisitation intentions.
용액환원법에 의한 MLCC용 단분산 니켈 미분말의 합성
김강민,이종흔,윤선미,이용균,이현철,최재영,Kim, Kang-Min,Lee, Jong-Heun,Yoon, Seon-Mi,Lee, Yong-Kyun,Lee, Hyun-Chul,Choi, Jae-Young 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.10
A mono-disperse Ni powders for multilayer ceramic capacitors were prepared in a large scale by solution reduction method using $NiSO_{4}$ $N_{2}$$H_{4}$and NaOH. The exothermic reactions such as Ni-complex formation between highly concentrated $NiSO_{4}$ and $N_{2}$$H_{4}$ and the reduction of $Ni^{2+}$ into Ni provided thermal energy sufficient for spontaneous solution-reduction reaction. Because well-defined Ni particles could be prepared without external heating, the present method was named as 'auto-thermal method'. The formation of Nicomplex, the precipitation of $Ni(OH)_{2}$ gel triggered by NaOH addition, and its reduction into Ni by dissolution-recrystallization route were the reaction mechanism. The preparation of mono-disperse and spherical Ni powder was attributed to uniform distribution of reducing agent $N_{2}$$H_{2}$ within $Ni(OH)_{2}$ gel due to the decomposition of$NiSO_{4}$-$N_{2}$ $H_{4}$ complex.
다중처리기에서 최소 프로세서를 사용하는 최적 타스크 할당
류근호(Keun Ho Ryu),이용균(Young Kyun Lee),박규태(Kyu Tae Park),이영모(Yeong Mo Lee),원종권(Jong Kwon Won),이상호(Sang Ho Lee) 한국정보과학회 1989 정보과학회논문지 Vol.16 No.1
다중처리기 환경에서는 다수의 타스크들이 다수의 프로세서에게 동시에 할당되기 때문에 타스크 할당 문제는 프로세서 활용을 측면에서 매우 중요하다. 일반적인 타스크 할당 문제는 프로세서 수를 고정하고 최소 수행 시간을 구하거나, 최소 프로세서를 사용하여 전체 수행 시간을 감소시키는 것으로서 NP-hard 문제에 부닥친다. 따라서 프로세서 활용율면에서 볼때 비효율적이다. 본 논문은 이 문제점을 해결하기 위하여 타스크들의 대기시간 및 타스크 할당횟수를 고려한 최소의 프로세서 수에서 최적으로 타스크를 할당하는 알고리즘을 제안한다. Task allocation algorithm is very important for the processor utilization in multiprocessor environments, because a large number of processes are assigned to a large number of processors simultaneously. In general, the task allocation algorithms fall into the class of NP-hard problems, which have a significant problems such that how to attain a minimum execution time using a fixed number of processors or total execution time using minimal number of processors. Therefore, most of them can not be applied efficiently to a large number of processes on a large number of processors. In order to solve this problems, we propose this algorithm for optimal task allocation to minimal number of processors in multiprocessor systems, considering a waiting time of tasks and the number of task assignment.
李龍均,申榮文 漢陽大學校 基礎科學硏究所 1983 基礎科學論文集 Vol.2 No.-
수산화나트륨과 암모니아수를 촉매로 phenol과 formalin을 70℃와 10℃에서 반응시켜 resole을 합성했다. 종래에는 polyether나 또는 polyester와 diisocyanate을 반응시켜 易燃性 polyurethane 수지를 합성하였으나 본 실험에서는 phenol 수지의 초기 축합물인 resole과 diphenylmethane diisocyanate(MDI)를 반응시켜 難燃性 경질 polyurethane foam을 합성했다. 합성된 경질 polyurethane 은 KSM3809, ASTM D 1692 및 ASTM D2623 로 물성실험을 한 결과 斷熱性이고 難燃性임이 밝혀졌다. Resole resins are synthesized by the interaction of a phenol with a formaldehyde under alkaline catalysts, such as sodium hydroxide and ammonia water at 70℃ and 90℃. Inflammable polyurethane resins were prepared by the reaction of polyether or polyester with diisocyanate in the previous days, but fire-retardant rigid polyurethane foams are synthesized by the reaction of the initial condensate resoles of phenolic resins with the diphenylmethanediisocyanate (MDI) in this study. Rigid polyurethanes which are modified are assured to be adiabatic and fire-retardant by means of KS M 3809, ASTM D 1692 and ASTM D 2623 test.