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이봉만(Lee, Bong Man),김원택(Kim, Won Taik) 한국디지털디자인협의회 2014 디지털디자인학연구 Vol.14 No.4
과학 기술을 통해 개도국 저소득층의 복지 증진과 지역사회 발전을 도모하는 적정기술이 사회 양극화 확대와 IT기술 발전으로 최근 다시 주목받고 있다. 하지만 기존의 많은 적정기술 프로젝트들은 ‘기술’로 접근하여 ‘보급’으로 실행하다 보니 실제 현장에서는 사용되지 않고 방치된 경우를 쉽게 볼 수 있다. 본 연구에서는 적정기술의 실패 요인을 분석한 후 수요에 기반을 둔 사용자 중심 접근을 위해 디자인 사고를 통한 인간중심 디자인방법론을 적용하였다. 즉, 현장에 방문하여 사용자 맥락에서의 관찰과 디자인 리서치를 하고, 사용자 중심의 주민참여 워크숍을 설계 및 실행하였다. 연구결과 인간중심 디자인 방법론은 현지의 문화적 특성을 고려하여 적용할 때 보다 가치있는 리서치 결과를 얻을 수 있었다. 또한, 주민들의 필요(needs)와 욕구(wants)를 발견할 수 있었다. 캄보디아는 1년의 절반 이상이 우기로 물이 넘쳐나지만 건기에는 마실 물이 부족한 국가이다. 이러한 이유로 니즈는 물과 관련된 것이었으나, 잠재적인 욕구는 물 보다는 도로와 전기의 인프라 구축이었다. 이러한 인프라 구축은 현지인의 삶의 질 향상에 가장 큰 기여를 할 요소라는 것을 인터뷰를 통해 알 수 있었다. 이 밖에도 현장에서 발견한 다양한 니즈는 국제개발협력 관계자, 사회적 기업, 비영리 단체뿐만 아니라 해외 청년창업자들에게 비즈니스 기회를 제공하는데 도움이 되고자 한다. The concept of appropriate technology, which is aimed at improving the welfare of low-income people in developing countries and developing local communities through science and technology, has recently garnered attention due to the expansion of social polarization and IT development. Many previous appropriate technology projects were approached on the basis of "technology" and performed on the basis of "distribution", and as a result, they were not employed in actual sites, and were frequently neglected. This study applied human-centered design methodologies for user-centered design thinking through approaches based on an analysis of demand and failure factors of appropriate technology. To survey the demand of water, this researcher visited Cambodia, conducted design research in the context of users, and designed and performed a user-centric resident participation workshop. As the result of the analysis, human-centered design methodology brought about more valuable research results than methods reflecting local cultural characteristics. In addition, through the methodology, the needs and wants of the residents were discerned. Although Cambodia has a great deal rain water because it rains for more than half the year, the country still lacks drinking water during the dry season. For this reason, the needs expressed were related to water. However, their potential desire was for infrastructure related to electricity and roads, rather than water. According to interviews with local residents, solving infrastructure problems would make the biggest contribution to improving the quality of life of local residents. Aside from that, it is expected that various needs found in actual sites will be helpful to provide business opportunities not only to those concerned with international development cooperation, social enterprises, and non-profit organizations, but to young entrepreneurs.
李福熙(Bok-Hee Lee),李峰(Bong Lee),李守俸(Su-Bong Lee),姜成萬(Sung-Man Kang) 대한전기학회 2006 전기학회논문지C Vol.55 No.5
To evaluate the change in protective levels of zinc oxide (ZnO) varistors after the surge absorption, this paper investigated the effects of the number of injection and amplitude of lightning surges on the life of ZnO varistors for low voltages. Leakage currents flowing through ZnO varistors subjected to the 8/20㎲ impulse currents under 60 Hz AC voltages were measured. The surge simulator system ECAT that can generate 8/20㎲ impulse currents with a peak short-circuit of 5 [㎄<SUB>p</SUB>] was used. The ZnO varistor leakage current increases with exposure to impulse current, and the number of injection of 8/20㎲impulse currents to breakdown was inversely proportional to the amplitude of the test current. Behaviors of ZnO varistor leakage currents were strongly dependent on the number of injection and amplitude of 8/20㎲ impulse currents. ZnO varistors degrade gradually when subjected to impulse current, and the resistive leakage current flowing through ZnO varistors subjected to the 8/20㎲ impulse currents under 60 Hz AC voltages was significantly increased after a certain number of injection that is dependent on the amplitude of the test impulse current. As a result. the life of ZnO varistors mainly depends on the amplitude and occurrence frequency of lightning surges.