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      • KCI등재

        전산해석을 통한 PEMFC 평행 유로에서 Baffle에 의한 출력특성 분석

        권오정,오창묵,신희선,오병수,Kwon, Oh-Jung,Oh, Chang-Mook,Shin, Hee-Sun,Oh, Byeong Soo 한국전기화학회 2014 한국전기화학회지 Vol.17 No.3

        Research on flow channel designs of the separate plates is necessary to improve the PEMFC performance. On concerning the performance improvement of PEMFC, many recent studies have been made on the interdigitated flow channel using forced convection. In this paper, the interdigitated flow channel is similarly applied on the parallel flow channel with a baffle or baffles. Numerical analysis is performed by using a commercial multiphysics program, which is called COMSOL, on the parallel channel with the fully blocked baffle(FBB) and there are three variables, the position of baffle, flow direction and flow velocity. Each power of the variables is resulted from the fixed 0.5V, the voltage from 80 percents of the maximum power. Finally, based on the full factorial designs(FFD), one of the design of experiments(DOE), each factor which has several levels lead to the conclusion. The analysis of the main effects and interactions of the factors is useful to find the most influenced factor to improve the power. 고분자 분리막 연료전지의 성능향상을 위해 분리판 유로설계연구는 필요하다. PEMFC의 성능향상에 대한, 강제대류를 이용한 interdigitated 유로가 최근에 많이 연구되고 있다. 이 논문에서는 interdigitated 유로를 배플들이 있는 평행류 채널에 비슷하게 적용하였다. 상용 multiphysics program인 COMSOL을 이용하여 완전차단배플인 FBB가 있는 평행류 채널에 관해 전산해석을 수행하였고 3가지 변인들(배플 위치, 유체 방향, 유체 속도)이 사용 되었다. 각각 변인들의 출력은 최대출력의 80%를 고려한 0.5V에서의 결과이다. 최종적으로, 실험설계법 중 완전요인실험법을 바탕으로 여러 수준을 갖는 각 실험인자로부터 결론을 도출하였다. 실험인자들의 주효과와 상호작용 분석은 출력을 향상시키는데 가장 영향을 주는 인자를 찾는데 유용하였다.

      • KCI등재

        노인단독가구의 부엌공간 실태와 개조에 관한 연구

        권오정,하해화,김미희,Kwon, Oh-Jung,Ha, Hae-Hwa,Kim, Mi-Hee 한국주거학회 2007 한국주거학회 논문집 Vol.18 No.2

        Kitchen space is one of the most dangerous places for the elderly. Modifications of kitchen space for improving safety and independence for older residents are very important factor for aging in place. The purpose of this study was to identify the current situations and modifications of kitchen space by elderly-headed households. The sample included 108 respondents over the age 65 who consisted of elderly-couple or single person household with homeownership in Seoul. The data were analyzed by descriptive statistics. Based on the findings of the study, the present incidence and recognition of future need in kitchen modifications were identified. Changes made in kitchen space tended to be nonstructural or relatively inexpensive items. In conclusion, this study suggests several ideas for improving current physical problems of kitchen space to support safe and independent daily living of older residents.

      • KCI등재

        노년층의 생애주거 경험을 통해 본 노후주거관 형성과정

        권오정,이용민,하해화,김진영,염혜실,Kwon, Oh-Jung,Lee, Yong-Min,Ha, Hae-Hwa,Kim, Jin-Young,Yeom, Hye-Shil 한국주거학회 2013 한국주거학회 논문집 Vol.24 No.3

        The purpose of this study is to explore the formation process of housing notion for later life of the elderly which is based on one's lifetime housing experiences. Qualitative data was collected through in-depth interviews with 6 highincome, highly educated aged women, who could select their housing and move voluntarily in old age and explain their housing experiences logically. The findings of this study showed that housing notion for later life was formed through a complex process of individual personality, lifestyle, housing experiences, housing values, housing market and period background as well as socio-demographic characteristics. This qualitative study has a significance as a holistic approach to reveal the lifelong experience of elderly individuals which had not been to deal in the quantitative research of housing for the elderly in the meantime.

      • KCI등재

        노인단독가구 유형별 주거 공간 사용 특성 - 생활시간조사 분석을 중심으로 -

        권오정,이용민,하해화,신혜인,김형우,Kwon, Oh-Jung,Lee, Yong-Min,Ha, Hae-Hwa,Shin, Hye-In,Kim, Hyoung-Woo 한국주거학회 2011 한국주거학회 논문집 Vol.22 No.4

        The purpose of this study was to identify characteristics of space usage patterns by types of elderly households(single or couple). For the study, 74 elders who were older than 65 were selected and their living behaviors at their home during a day (24 hours) were analyzed. Respondents were classified into 6 types based on a combination of their household type, income level and health status. The results showed that the elderly residents tended to live a well-regulated life, however, each type had unique time and space use pattern. For example, the more the elder residents were healthy, the more they used many rooms. Frail elderly residents spent most of the day in their bedroom. Also, if they had a spouse, each one tended to use a separate private room for his or her daily life whether they shared a bedroom or not.

      • KCI등재

        노인 거주자의 유비쿼터스 홈 서비스 요구도 조사를 위한 방법론 연구 - 종이기반 조사와 웹기반조사의 효용성 검증을 중심으로-

        권오정,이용민,하해화,Kwon, Oh-Jung,Lee, Yong-Min,Ha, Hae-Hwa 한국주거학회 2010 한국주거학회 논문집 Vol.21 No.3

        Recently, Web-based Survey has attempted to overcome the limitations of Paper-based survey. This method is more effective in costs and time use than traditional methods, also help respondents to understand and interest in the survey. Especially for the elderly, web-based survey is effective survey tool, because audio-visual material could be provied. The purpose of this study is to evaluate the effectiveness of two kinds of methods which were web-based survey and paper-based survey, focused on elderly residents' needs for ubiquitous home service. The participants were older than 60 and divided into 2 groups, web-based survey and paper-based survey, each group was controlled over by age, gender, computer skill. For this study, elderly residents conducted a survey passed through 2 steps, the first was residents' needs for ubiquitous home services, the second was an evaluation of survey methods. Finding were as follows : first, there was no difference between the two groups in needs for ubiquitous home service, so survey itself can not make a difference in survey results. Second, respondents of web-based survey were more interested in and felt easier about method that they conducted than ones of paper-based survey. Finally, Web-based survey will be more effective method to be figure out the need of the elderly who are familiar with computer.

      • KCI등재

        디지털 홈 거주자의 기술혁신성 정도에 따른 개인적 특성

        권오정,Kwon, Oh-Jung 한국주거학회 2009 한국주거학회 논문집 Vol.20 No.2

        The supply of digital homes has been increasing but digital home services which meet consumer needs under the various conditions have not identified. The purpose of the study was to investigate the residents' personal characteristics living in digital apartments with comparison of their trait of innovativeness toward technology. Residents who lived in two apartment complexes equipped with fundamental digital home services (Level 1 service) were selected to conduct the survey. A total of 500 responses were used for data analyses. Responses were classified into three groups based on their innovativeness toward technology for data analyses. The results of the study showed that residents' sociodemographic and housing related characteristics differed according to their acceptance trait of new technology. Early adopters and early majority were younger, higher income, and more educated than late adopters. Also, they were more likely to be renters and consider installation of digital home services before they moved in. Respondents who had higher innovativeness tended to experience more positive life changes after using digital home services and possessed more and many digital appliances. Remote control and remote meter reading service were the most preferable features among digital home services without no differences in three groups.

      • KCI등재
      • KCI등재

        디지털 홈 거주자의 홈오토메이션 시스템에 대한 거주 후 평가 사례 연구 - H 초고층 아파트 거주자를 중심으로 -

        권오정,Kwon, Oh-Jung 한국주거학회 2008 한국주거학회 논문집 Vol.19 No.1

        Recently, newly built apartments in Korea are provided various home automation (HA) systems based on information technology(IT) for residents' safer, healthier and more convenient living. However, the residents in these digital apartments are often not able to use the home automation systems effectively because of lack of their IT knowledge, attitude, or education. However, there are few researches have been done to find out the HA systems' real problems with regard to residents' aspects who use those systems everyday. The purpose of this study was to find out residents' current uses, satisfaction level and existing problems of HA systems by residents' POE. The findings of this study will give useful information to digital home construction companies to provide user-friendly digital home services for increasing users' satisfaction. One distinctive apartment equipped with home automation systems located in Seoul was selected for in-depth personal interview. The researcher developed a survey instrument and collected the data from 58 residents in January, 2007 who had been living there for more than a year. The results of the study found that critical problems were existed in several systems and they caused a lot of dissatisfaction from the residents. Also, some residents do not use several systems although they need to use them due to the burden of maintenance fee. Further detail findings and suggestions of this study were discussed.

      • KCI등재

        노인단독가구의 주행위와 가구.가전제품의 사용 특성

        권오정,이용민,하해화,신혜인,김형우,Kwon, Oh-Jung,Lee, Yang-Min,Ha, Hae-Hwa,Shin, Hye-In,Kim, Hyung-Woo 한국주거학회 2010 한국주거학회 논문집 Vol.21 No.1

        The purpose of this study was to analyze behavioral patterns of elderly residents and to identify the characteristics of using furniture and home appliances by elderly-headed households. For this purpose, field studies that included observation and open-ended interview were conducted with 52 elderly-headed households. The major findings of this study were as follows: elderly-headed households need home appliances with lighter body, lower capacity and simple functions. Furniture for elderly people should be designed to minimize the inconvenience of using western style furniture, also the behavior patterns which are important to the elderly like taking medicine have to be considered. And it is necessary to design furniture and equipments properly to prevent accidents happened in housing. Lastly, because the elderly relies heavily on watching TV, it will be desirable to apply TV-friendly devices such as home networking and home automation. Research results will be useful information on product design to reflect characteristics of elderly and follow-up studies associated with each furniture and appliances and specific living behavior are needed.

      • KCI등재

        노년층의 기술수용성향과 홈오토메이션 시스템에 대한 요구도

        권오정,Kwon Oh-Jung 한국주거학회 2005 한국주거학회 논문집 Vol.16 No.6

        The purpose of this study was to determine the factors which affect older people's innovativeness toward technologies and factors which affect their demand of home automation system. The study collected data from 289 persons who are 50 years and older with experience living in an apartment currently or past. Innovativeness toward technologies of respondents were low level and the significant factors which affected their innovativeness were age, education, employment, marital status, current housing types, health status of self and spouse, consideration of home automation system for a newly-moved house. Education, employment types, consideration of home automation system for a newly-moved house, and plan for moving were the major factors which affect demand of home automation system. Also, older people's innovativeness toward technologies was the most important factor which affected demand of home automation system. Th results of this study explained that high technologies which are adopted in residential environment should be considered target consumers' abilities and attitudes for acceptance toward new ideas. Especially, for older consumers, various ideas to expand their understanding of new technologies should be developed and the positive effect of technologies to increase the quality of their later life should be educated.

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