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파형 단면을 가진 유하식 집열기의 열적 성능에 대한 이론 및 실험 연구(I)
이종호,정모,백남춘,오정무,Lee Jong Ho,Chung Mo,Baek Nam Choon,Auh Chungmoo 대한설비공학회 1983 설비저널 Vol.12 No.4
The municipal government of Daejeon, Korea set up a plan to retrofit solar energy to the existing swimming pool. The pool was constructed in 1980, and meets the requirements of International standard. It will be used for the 1986 Asian Games and the 1988 Seoul Olymipics. The roof structure of the existing pool is to be modified to accomodate trickle solar collectors. In addition, various energy conserving ideas will be applied to the existing building structure. For the prevention of over heating of collectors on the roof, natural air convection scheme will be adopted within the collector system. Natural convection of passive type heating would be also adopted for the space heating of the pool when the system is idle. At present, the pool can be utilized only for two months a year without auxilairy heating. With oil heating, the energy cost would be too high for the normal operation. When this project completed in March 1984, it would be expected to be openable for seven months a year without a significan amount of auxiliary heating. In this project, two dimensional numerical analysis technic have been used to analyse the characterisitics of thermal performance of the swimming pool system. An experimental tat verification of the theoretical analysis have been also attempted.
이종호(Jong Ho Lee),정모(Mo Chung),박원훈(Won Hoon Park) 한국태양에너지학회 1987 한국태양에너지학회 논문집 Vol.7 No.1
파형 단면을 가진 유하식 집열기의 이론 및 실험 결과로서 유량, 각도등 집열성능에 미치는 영향등이 고려되었다. 입구 온도와 출구온도 차이가 적을 경우에는 이론과 실험치가 잘 맞으나 온도차이가 많을 경우 혹은 입구온도가 높을 때에는 투과체안에 생기는 결로 및 수증기의 영향으로 편차가 커진다.<br/> 개방회로와 폐쇄회로의 경우를 구분하여 실험되었는데 개방회로의 경우 효율은 약간 저하되지만 전반적인 성능은 폐쇄회로와 같은 경향을 나타내었다. 개방회로는 과열을 막는 방편으로 이용될 수 있다.
박창호(ChangHo Park),이종구(Jong Goo Lee),김영진(Young Jin Kim),곽호완(Ho-Wan Kwak),이정모(Jung-Mo Lee) 한국인지과학회 1998 인지과학 Vol.9 No.4
인터넷에서 정보를 검색하는 것은 일회적이거나 시행착오적인 것이 아니라, 검색엔진이라는 환경 속에서 조작을 하고 피드백을 받고 재조작을 하는 탐색 학습의 과정이다. 정보검색 과정에서 사용자들이 인터넷에 대해 어떻게 접근하며 어떤 전략을 구사하는지는 검색과정의 이해뿐만 아니라 좋은 검색엔진의 디자인에 중요한 문제이다. 본 연구는 이를 검토하기 위해, 실험참가자들이 한글정보검색엔진 심마니를 써서 인터넷 상에서 실제로 검색문제들을 풀도록 하였다. 실험참가자들은 정보검색 중 자신의 생각을 말로 표현하였는데, 이것을 기록한 언어보고 자료(프로토콜)와 실제로 진행된 검색 과정들이 분석되었다. 그 결과, 실험참가자들은 매우 단순한 형태의 검색식을 만들었으며, 정보가 주제별로 분류되어 있는 것으로 기대하는 경향이 있었다. 실험참가자들이 주로 사용한 검색전략은 검색문제의 핵심어를 유지한 채 다른 검색어를 교체하는 것이었다. 정보사냥 대회에 출전한 숙련자의 검색과정도 크게 다르지 않았다. 실험참가자 및 초보 사용자들은 검색엔진과 웹 조직에 대해 비교적 단순한 모형을 갖고 있는 것으로 생각되었다. 검색엔진의 사용성도 문제가 되었다. 인터넷 정보검색을 인간-기계 상호작용과 관련짓는 논의가 있었다. Information search on the internet can be understood as an exploratory learning process that users make operations and get feedback recursively in the environment of search engine, not as a trial and error learning. How users approach to the internet and what strategy they take in searching information are important issues in understanding search processes and design of good search engines as well. In order to probe these. this study had participants solve search problems on the internet using Simmany, a Korean information search engine. Participants had to express their thoughts on-line in verbal (think aloud method). Verbal protocols, keyword inputs, and other search behaviors were analyzed. In the result, participants made very simple forms of search equations (Keyword or its combinations), and they were likely to expect that information would be arranged according to its topic. Their search strategy was to keep a critical word and change other words to be combined squentially. Apparently there was no difference between information search novices in this study and experienced persons at the information search contest. It was thought that participants of this study and common people had unsophiscated model of search engines and Web organization. There was also a usability problem in search engine. Issues on information search on the internet were discussed in relation to human-computer interaction.
김종문,김종훈,이정모,정진상,이인식 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-
Objective: The purpose of the present study was to investigate relationship between autonomic neuropathy and diabetic complication through analysis of HRV(heart rate variability) of diabetic patients, and ultimately to investigate effectiveness of HRV analysis on evaluation and prediction of diabetic peripheral neuropathy. Method: We performed electromyogram, blood analysis and HRV test with 30 diabetic patients. By comparing SDNN(standard deviation of RR interval) of HRV, we analyzed the relationship between this parameter and duration of diabetes, age, and results from electromyogram. Results: 1) Averages of patients' age and the duration of diabetes were 56.12 ± 10.37, 14.58 ± 10.16, respectively. The relationship between each parameter of HRV was not significant(r<0.4). 2).When patients were classified according to the presence or the absence of H-reflex abnormality, peripheral neuropathy, gastrointestinal symptom When patients were classified by the degree of H-reflex abnormality and BUN(blood urea nitrogen), SDNN had reverse relationship to each other. Conclusion: Our results demonstrate HRV test shows statistically significant differences according to the absence or presence of diabetic peripheral neuropathy, gastrointestinal symptom. Therefore, we expect HRV analysis might be used as an efficient method to detect diabetic peripheral neuropathy, gastrointestinal disease, since it is relatively easy and convenient for both doctor and patient.