CAN/CAM 기술의 현상

정정화,Jeong, Jeong-Hwa 한국전자정보통신산업진흥회 1986 電子振興 Vol.6 No.3

Place and Routing

정정화,Jeong, Jeong-Hwa 대한전자공학회 1989 전자공학회지 Vol.16 No.1

홍색 비황 광합성 세균 Rhodopseudomonas sp. KH4의 Extracellular polysaccharide의 중금속 흡착

정정화,서필수,공성호,이종렬,이상섭,Jeong, Jeong-Hwa,Seo, Pil-Soo,Kong, Sung-Ho,Lee, Jong-Yeol,Lee, Sang-Seob 한국미생물학회 2006 미생물학회지 Vol.42 No.4

본 연구에서는 경기도 안양에 있는 하천에서 분리한 홍색 비황 광합성 세균Rhodopseudomonas sp. KH4에서 생성된 extracellular polysaccharide (EPS)의 중금속 흡착특성에 대해 연구하였다. 100 mg/L의 Cd과 Cu의 최적 흡착조건(온도$40^{\circ}C$ Cd; pH 8, Cu; pH 5)에서 1.0 g/L의 EPS를 첨가하였을 때, Cd의 경우 30분 동안 842 mg/L, Cu의 경우 10분 동안 70.0 mg/L가 흡착되었다. 또한 Cd과 Cu가 각각 100 mg/L씩 공존되어 있는 경우, pH 5, $25^{\circ}C$에서 EPS 1.0 g/L 첨가하였을 때 Cd과 Cu가 각각 16.8 mg/L, 48.7 mg/L가 흡착되었다. 또한 Langmuir 등은 흡착식으로 부터 EPS 1.0 g/L, pH 5, $25^{\circ}C$에서 Cd과 Cu의 흡착량은 각각 76.9 mg/L, 67.1 mg/L로 실제 경험치와 큰 차이를 보이지 않았다. 에탄올 침전법으로 정제된 KH4 strain으로부터 생성된 EPS는 gas-liquid chromatography (GLC) 분석에 의한 중성당 분석 결과, arabinose, glucose, mannose가 각각 2.4%, 7.1%, 90.5%로 mannose가 대부분을 구성하였다. In the present study, we examined biosorption characteristics of heavy metals onto the extracellular polysaccharide (EPS) produced by the purple nonsulfur photosynthetic bacteria Rhodopseudomonas sp. KH4, which was isolated from a stream in Anyang, Kyonggi-Do. When Cd (100 mg/L) and Cu (100 mg/L) were added to EPS (1.0 g/L) in the optimal condition (Cd; pH 8, Cu; pH 5, $40^{\circ}C$), 84.2 mg/L of Cd and 70.0 mg/L of Cu were adsorbed within 30 min and 10 min, respectively. When 100 mg/L of Cd and Cu were present as mixture, 16.8 mg/L of Cd and 48.7 mg/L of Cu were adsorbed at $25^{\circ}C$, pH 5. The maximum adsorption capacity determined by fitting Langmuir isotherms model was suitable for describing the biosorption of Cd (76.9 mg/g) and Cu (67.1 mg/g) by EPS. The neutral monosaccharide in the EPS determined by GC consisted of arabinose (2.4%), glucose (7.1%) and mannose (90.5%).

양자점 레이저 다이오드의 식각 깊이에 따른 접합온도 측정

정정화,한일기,이정일,Jeong, Jung-Hwa,Han, Il-Ki,Lee, Jung-Il 한국진공학회 2008 Applied Science and Convergence Technology Vol.17 No.6

순방향 전압-온도 (forward voltage-temperature)법을 이용하여 양자점 레이저 다이오드의 접합온도를 측정하였다. 식각 깊이가 깊은 mesa 구조의 경우 입력전류에 대한 접합온도의 증가율은 0.05 K/mA인 반면, 식각 깊이가 낮은 mesa 구조의 경우 0.07 K/mA로서 상대적으로 높게 측정되었다. 깊은 mesa 구조에서의 상대적으로 낮은 접합온도 증가율은 mesa 측면 방향으로의 열확산 효과 때문인 것으로 설명된다. Junction temperature of quantum dot laser diodes is investigated by utilizing forward voltage-temperature method. In the case of ridge type laser diodes with deep mesa the increasing rate of junction temperature to current is about 0.05 K/mA, while in the case of shallow mesa the increasing rate is about 0.07 K/mA. It is explained that the relatively low increasing rate in the deep mesa results from the heat expansion to the lateral direction of mesa.

공공갈등 예방을 위한 제도적 접근

정정화(Jeong Hwa Jeong)(鄭貞和) 경인행정학회 2012 한국정책연구 Vol.12 No.2

This study, in perspective of institutional approach on public conflicts, has compared conflict prevention mechanism being executed in the United States, the United Kingdom, Germany, and France. With background of long traditional negotiation culture, the US is being operated by negotiated rulemaking in prevention of conflicts. The UK, with strong background of citizen autonomy, has lively accepted opinions via customary civil discussion. Germany has guaranteed civil participation by system with the process of determinate plan and the principal of comparative profit(Abwagungsgebot). France is preventing conflicts with CNDP(Commission Nationale du Débat Public). Comparison of the four countries in conflict prevention mechanism, introduction of the public debate institution such as CNDP to reach a social consensus-building is considered desirable. Since many national projects in Korea are decided only by president election campaign or central government’s decisions, the need of building mutual and fair systematic device is vital. However, to prevent public conflicts, not only the legal-institutional approach is required but also consensus-building and cultural-behavioral approach. To maintain positive effects by public debate in prevention of conflicts, the participants in policy-making process and stakeholders need to understand and accept the importance of forming agreement and value of process by public debate. 한국 사회에 빈발하고 있는 공공갈등을 사전에 예방하기 위한 제도적 접근으로 본 연구는 미국, 영국, 독일, 프랑스 등 4개국에서 시행하고 있는 갈등예방기제를 비교분석하였다. 미국은 오랜 전통의 협상문화를 배경으로 협상에 의한 규칙제정이 갈등예방의 주요기제로 작동하고 있고, 주민자치 전통이 강한 영국에서는 관습적인 시민협의가 다양한 제도로 정착되었다. 독일에서는 계획확정절차와 이익형량원칙에 따라 주민의견수렴절차를 제도화하고 있고, 프랑스는 시민들의 적극적인 의사표현과 토론문화의 전통으로 공공토론제도가 발달되었다. 각국의 이같은 갈등예방기제를 비교분석한 결과, 우리나라는 프랑스의 CNDP와 같은 공공토론제도를 도입하여 사회적 합의형성시스템을 구축하는 것이 바람직한 것으로 판단된다. 우리나라의 경우 프랑스와 같은 토론문화가 정착되어 있지 않고, 공공토론을 통한 합의도출에도 익숙하지 않지만, 일반시민들이 공공토론에 참여함으로써 시민성(civility)을 배양하고 사회적 자본(social capital)을 축적할 수 있는 기회를 가질 수 있기 때문에 적극적으로 검토할 필요가 있다. 본 연구는 갈등예방기제의 도입을 위한 제도설계에 초점을 두었지만, 공공갈등을 예방하기 위해서는 제도 도입이나 기구 설립 못지않게 정책결정자와 이해당사자들의 인식과 가치관의 변화를 추진하면서 제도 운영과 갈등해결프로그램을 견인할 수 있는 시민사회의 성숙한 토양을 다져 나가야 할 것이다.

부처간 정책갈등과 관료정치

정정화(Jeong Hwa Jeong) 한국정부학회 2003 한국행정논집 Vol.15 No.1

공공갈등과 합의형성

정정화(Jeong Hwa Jeong) 한국정부학회 2011 한국행정논집 Vol.23 No.2

공공갈등에 대한 심의민주주의적 접근은 이해당사자들의 폭넓은 참여와 소통과 신뢰에 기반한 합의를 통해 갈등을 해결하는 방식이다. 본 연구는 시민배심원제와 시나리오 워크숍이라는 심의민주주의적 의사결정방식을 적용해 공공갈등을 해결한 울산 북구의 음식물자원시설 건립과 시화호 개발 사례를 분석하였다. 사례분석 결과 두 사례는 심의과정의 소통성은 비교적 높은 수준이었고, 심의절차도 비교적 공정하게 운영되었으나, 참여주체의 대표성이 낮은 수준이었다는 것이 공통점이었다. 참여주체의 대표성 저하는 결국 합의 결과의 성찰성과 지속성에도 영향을 미쳐 갈등해결 기제로 제대로 작동하지 못한 중요한 원인으로 분석되 었다. 따라서 향후 심의민주주의적 의사결정방식을 도입할 경우 제도설계 과정에 대표성의 확보를 우선적으로 고려하여야 할 것이다. 또한 합의결과의 성찰성을 담보하기 위해서는 권력과 자원이 우월한 정부가 논의 과정에 개입해 현실지배를 정당화하는 기제로 전락하지 않도록 중립성을 확보하는 방안을 강구하여야 한다. 이와 함께 심의과정 참여자들이 이성적 논증을 통해 갈등을 해결하기 위해서는 갈등이 표면화되기 이전에도입하는 것이 효과적인 것으로 분석되었다. The deliberative democracy for resolving public conflicts is consensus building approach which is characterized by wide-ranging participation of diverse stakeholders and amicable communication based on trust. The purpose of this study is to find the implications and limitations of deliberative democracy in the cases of food waste disposal facilities of Ulsan Buk-gu which is resolved public conflicts by citizen juries, and the development of Shihwa Lake which is resolved by scenario workshop. In two cases the communication and fairness in the process of deliberation have comparatively high standard in common, but the representativeness of participants is evaluated in a low level between the two. As the representativeness of participants go down, the reflection and the durablity of the consensus building get lower. According to the finding of this study empirically, it should be emphasized that the first priority in the application of deliberative democracy has been to consider the representativeness of participants. Secondly, if we secure the reflection of the consensus building, the government that hold a dominant powers and resources should maintain the impartiality in the process of earnest discussion. Thirdly, if we intend to resolve public conflict through the reasoned argument, the deliberative democracy should be introduced at an early stage of the conflicts.

정부와 NGO의 관계 비교연구

정정화(Jeong-hwa Jeong) 서울행정학회 2006 한국사회와 행정연구 Vol.17 No.1

This paper analyses the relation between government and environmental NGOs in America, Japan, and Korea. In many countries, the types of the government-NGO relationship depend on various factors such as the characteristics of political system, historical and social atmosphere, and nature of the problems in hand. This paper probes two major factors that can condition the government-NGO relationship, which are organizational characteristics of NGOs and political opportunity structure which means a relative openness of political system and configuration of political power among the relevant actors participating in policy-making process. The comparative analysis shows that the political opportunity structure has much affected the model of the government-NGO relationship, while organizational characteristics of NGOs played an insignificant role. As a result, the interdependence model of government-NGO relationship is found under the circumstances where the openness of political system is enlarged and the configuration of political power is favorable to NGO.

중소규모 오피스 건물의 열적쾌적감과 에너지 절감을 도모하는 공조 시스템 및 제어방안

정정화(Jeong-Hwa Jeong),이영재(Young-Jae Lee),송두삼(DooSam Song) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6

In these days, green building movement is prevailing in the world, but existing HVAC control system, for example VAV or CAV, have problems about a low energy efficient and that can't satisfy residential comfortable. This is particularly responsible for the inadequate HVAC control strategies and system performance. In this study, as an innovative indoor air-conditioning method, the multi-system air-conditioning system will be proposed. Through field measurement, the indoor thermal comfort of the proposed system was reviewed and the control logic to maximize the proposed system performance in terms of energy efficient will be suggested.

尖端產業團地 誘致를 위한 地方政府 活動의 效果分析

鄭貞和(Jeong Jeong-Hwa) 한국지방자치학회 2000 韓國地方自治學會報 Vol.12 No.4

This study attempts to find out the effectiveness of the local governments I attraction efforts for deciding the location of high-tech industrial parks. To achieve the purpose of this study, a research was conducted of the Media-valley and Techno-park by qualitative analysis method. The location determinants are economic-spatial (conditions of location), political (election, political party), attraction effort -related (spporting policies, local governor's efforts), and environmental variables(location decision structure, the object of national land development plan). This study was able to find out the correlation between local governments' attraction efforts and location decision for high-tech industrial parks. In this study, local governments' attraction efforts had a great effect on location decision. The variables of local governments' attraction efforts(especially spporting policies) were more influential in the Media-valley rather than Techno-park in which the location decision structure was different from each other. This proves that attraction efforts are affected by environmental variables(especially location decision structure). In this study, we suggest that the central government should delegate more power to local governments so that they can work out their own proper policies for attracting various facilities. This is because the successful establishment of high-tech industrial parks very much depends on the localities' progressive will.