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적정기술과 모바일 어플리케이션 연동을 통한 국제개발 제안 및 현지적용 사례
강경철(Peter K. Kang),송주현(Juhyun Song),홍성욱(Seong Uk Hong) 국제개발협력학회 2011 국제개발협력연구 Vol.4 No.1
According to the World Health Organization, approximately 20% of the world population does not have access to safe drinking water and 40% lack basic sanitation facilities. The key to solving these water and sanitation problems in developing communities is to find a method that leads to sustainable funding as well as supports communities with demand-driven approach. We are thus proposing Project AQUA, a model that meets the requirements to achieve sustainable development in these communities. Through Project AQUA, our team will provide the following two(complementary) services: we will (i) develop an innovative (reality- based) mobile application to be played by smart phone and online (Facebook) users in developed countries allowing for on-going, sustainable funding, and (ii) transfer appropriate technology to African communities to assist them in achieving specifically-tailored, sustainable solutions to their water and sanitation problems. 세계보건기구 (WHO)에 따르면 지구 전체 인구의 약 20%가 오염된 물로 인하여 위협받고 있으며 약 40%가 화장실 등 기본적 위생시설이 없이 살아간다고 한다. 이러한 문제 해결을 위해서 그동안 여러 노력들이 있어왔고, 일부 성과들도 있었지만 지속 가능한 개발 및 문제 해결을 보여준 사례는 많지 않으며, 여전히 개발도상국의 수 많은 사람들이 식수 및 위생 문제로 생명의 위협을 받고 있다. 본 연구에서는 국제개발협력 분야에서 최근 주목을 받고 있는 ‘적정기술’ 중 하나인 바이오샌드필터를 탄자니아의 한마을에 보급하고 마을 주민들이 스스로 관리하도록 함으로써 지속적인 운영 시스템을 구축하는 아쿠아 프로젝트에 대해서 소개하였다. 또한 아쿠아 프로젝트에서는 모바일 기반의 앱을 개발하고 이를 상용화함으로써 프로젝트의 재정적인 지속성을 추구하고 있으며, 이에 대해서도 설명하였다.
Doit(Distributed Open Intelligent Telephony) 테스트베드의 설계 및 구현
강경철(Kyung-Cheol Kang),류연승(Yeon-Seung Ryu),이관수(Kwan-Soo Lee) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.1A
본 논문에서는 인터넷 전화와 인터넷 QoS 표준을 따르는 개방되고 지능적인 분산 시스템을 연구하기 위한 Doit("두-잇"이라 부름: Distributed Open Intelligent Telephony) 테스트베드의 구현에 대해 기술한다. Doit 테스트베드는 인터넷에 접속하는 단말이면 간편하게 인터넷 전화가 가능한 분산 시스템을 연구하고 향후 고성능의 확장성있는 시스템에 대한 연구 기반으로 사용하는 데 그 목적이 있다.
SIP(Session Initiation Protocol) 트래픽 관리 도구의 설계와 구현
강경철(Kyoung-Cheol Kang),류연승(Yeon-Seung Ryu) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1A
본 논문에서는 SIP(Session Initiation Protocol)을 사용하는 VoIP(Voice over IP) 네트워크에서 SIP 트래픽을 감시, 분석하는 관리 도구인 SIPMan 을 설계하고 구현하는 연구를 소개한다. 구현하는 SIPMan 은 실시간으로 SIP 패킷을 캡처하여 call 에 대한 다양한 정보를 분석하며 DB 에 저장할 수도 있다. VoIP 망 관리자는 SIPMan 의 web GUI 를 사용하여 call detail record, SIP 트래픽 정보 등을 모니터링할 수 있다.
강경자,김범호,김대환,윤희정,조영선,한나은,최종철,이성남,최옥경,Kang, Kyung-Ja,Kim, Beom-Ho,Kim, Dae-hwan,Yun, Hee-Jeong,Cho, Young-Sun,Han, Na-Eun,Choi, Jong-Chul,Lee, Sung-nam,Choi, Ok-Kyung 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.2
The purpose of this study was to investigate the contents of apigenin and luteolin in vegetables mainly distributed and consumed in Korea. In this study, the contents of apigenin, apigenin-7-O-glucoside, luteolin, and luteolin-7-O-glucoside in vegetables were surveyed by using liquid chromatography coupled to mass spectrometry (LC-MS/MS). According to the analysis of 27 items (91 samples) in vegetables, the content of total apigenin (the sum of apigenin and apigenin-7-O-glucoside) was quantified in 8 out of the 27 items in vegetables, followed by pepper leaves, parsley, celery, chamnamul, foremost mugwort, and perilla leaves. The content of total luteolin (the sum of luteolin and luteolin-7-O-glucoside) was found in 11 of the 27 items in vegetables, followed by pepper leaves, dandelion, celery, red lettuce, foremost mugwort, and perilla leaves. Celery was divided into stalks and leaves for comparing the contents of apigenin and luteolin. Celery showed higher contents of apigenin and luteolin in leaves than in stalks.
강경덕(Kang, Kyoung-Duck),강준구(Kang, Joon-Koo),김지연(Kim, Ji-Yeon),오준호(Oh, Joon-Ho),이준철(Lee, Jun-Chul),장유리(Jang, You-Ri) 경희법학연구소 2010 KHU 글로벌 기업법무 리뷰 Vol.3 No.1
After the plan to move the administrative functions of the Capital was ruled unconstitutional by the Constitutional Court, the policy was changed and was implemented in a downsized form of moving a few number of administrative organs. However the recent government amendment which nullifies moving of any administrative organ has flamed controversy on all sides. The notion of regional equity reflects the constitutional principle of equality and it is the central idea behind local self-government. Moreover, balanced regional development will help to resolve the increasing disparity between the Greater Metropolitan area and others regions as well as increasing economic and social efficiency. We need to look at the Se-jong city issue in this context. Construction of Se-jong city was first conceived by the Park Jung-Hee regime and hence is not an issue confined to this current administration. Also this policy should not be seen as a mere appeasement to the people of Chung-Cheong province. The validity of the policy should be assessed in the wider principle and context of balanced national development. When in comparing the validity of the original legislation and the government amendment, those in favor of the amendment criticize that the original bill will harm administrative efficiency. However, this is purely a “Seoul-centric” analysis and it is inconsistent with the principle of balanced regional development. The original plan is more efficient on a nationwide scale compared with the amendment. Administrative inefficiency has to be accepted up to a certain degree as a price for balanced regional development and numerous compensative policies can be introduce to minimize the problem. Furthermore, the fact that the original plan already guarantees self-sufficiency of Se-jong as a city makes the claim that the amendment will help to create a self-sufficient city, meaningless. Therefore, the amendment is less satisfactory not only in the context of balanced regional development, but also efficiency-wise. The amendment also has a normative problem. It lacks in democratic legitimacy since there were no proper discussions involving all social voices and there were not enough objective evaluations and analyses. Also it is not in consonance with already existing legislations on balanced national development. The region selected by the amendment does not possess any notable superiority over other regions as a education-science city. Hence it is possible that it is in violation of the consitutional principle of non-discrimination since there is no rational reason for the selection. After examination of the above mentioned rationales, it can be concluded that, without extensive changes and supplementary measures, the amendment is unlikely to pass the National Assembly. If the government retracts the amendment or makes extensive changes to it as to allow part of the executive branch to move to Se-jong, we can expect that the national consensus of the location of the capital city could change as well. Then the customary constitutional principle which makes Seoul the Capital could be overturned by the Constitutional Court and more complete move of the Capital and its administrative functions can be expected to follow.
고분자전행질형 연료전지내 마이크로다공층 영향에 대한 수치적 연구
강경문(Kyungmun Kang),주현철(Hyunchul Ju) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In the fuel cell community it is well-known that a micro-porous layer (MPL) plays a crucial role in the water management of polymer electrolyte fuel cells (PEFCs), and thereby, significantly stabilizes and improves cell performance. In this paper, a numerical MPL model is developed and embodied with comprehensive, multi-dimensional, multi-phase fuel cell models that were developed earlier to discover the exact roles of MPLs,. The effects of different porous properties and liquid-entry pressures between an MPL and a gas diffusion layer (GDL) are examined via fully three-dimensional numerical simulations. Discontinuity in liquid saturation at the GDL/MPL interface is captured by the model when the differences in pore properties and wettability between the MPL and GDL are taken into account without considering variation in the liquid-entry pressures. However, the simulation of this case fails to capture the beneficial effects of an MPL on cell performance, predicting even lower performance than the case of no MPL. On the other hand, when a high liquid-entry pressure in an MPL is additionally considered, the numerical MPL model predicts liquid-free MPL and successfully demonstrates the phenomenon that the high liquid-entry pressure of the MPL prevents any liquid water from entering the MPL. Consequently, it is found from the simulation results that the liquid-free MPL significantly enhances the back-flow of water across the membrane into the anode, which, in turn, helps to avoid membrane dehydration and alleviate the level of GDL flooding. As a result, the model successfully reports the beneficial effects of MPLs on PEFC performance and predicts higher performance in the presence of MPLs (e.g., an increase of 67 ㎷ at 1.5 A ㎝-2). This study provides a fundamental explanation for MPL functions and quantifies the influence of MPL’s porous properties and the liquid-entry pressure on water transport and cell performance.