Ferroxplana Y-type(Ni₂Y) 磁性 분체의 합성

박상하(S.H. Park),김한근(H.G. Kim),사공건(G. Sa-Gong) 대한전기학회 1993 대한전기학회 학술대회 논문집 Vol.1993 No.7

사회적기업의 사회적가치가 조직구성원의 직무태도에 미치는 영향

박상하 ( Sang Ha Park ),김중원 ( Jung Won Kim ),박정식 ( Jeong Sik Park ) 한국인적자원관리학회 2009 인적자원관리연구 Vol.16 No.4

Surrogate를 이용한 계층적 구조의 u-LifeCare 시스템 설계

박상하(SangHa Park),조진성(JinSung Cho) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.1D

유비쿼터스 컴퓨팅 시대의 도래와 삶의 질 향상을 위한 개개인의 건강 유지와 증진에 대한 욕구는 유비쿼터스 라이프캐어(u-LifeCare) 산업의 발전을 촉진시키고 있다. 본 논문에서는 기존 헬스캐어(HealthCare)시스템에 관련된 연구들의 문제점을 분석하고 이를 해결하기위한 새로운 u-LifeCare 서비스 시스템의 구조를 제안한다. 기존 헬스캐어 시스템의 구조는 대부분 중앙집중형 Client/Server의 구조를 가진다. 이런 구조는 서비스 제공을 위한 모든 처리와 Data가 중앙 서버에 집중되므로 서버의 오버헤드 현상을 발생시킬 수 있으며 이는 사용자에 대한 서비스 응답시간 (Response time)을 증대시키고 심할 경우 서버다운 현상을 초래 할 수 있다. 제안하는 구조에서는 Surrogate를 동적으로 발견하고 Computing resource로 이용함으로써 이러한 문제점들을 해결하고 효율적인 서비스를 제공할 수 있다.

충격파 터널용 마하 6 컨투어 노즐의 출구 압력 측정 및 해석

박상하(Sangha Park),김근영(Keunyeong Kim),장병국(Byungkook Jang),박기수(Gisu Park) 한국추진공학회 2019 한국추진공학회 학술대회논문집 Vol.2019 No.11

풍동 장비에서의 유동 균질성 연구는 풍동에서 측정하는 모델에서의 측정 정확도를 향상시키기 위해 중요하다. 본 연구에서는 충격파 터널에 사용되기 위해 설계 및 제작된 마하 6 컨투어 형 노즐의 출구압력 측정을 수행하고 이를 바탕으로 본 노즐 유동의 시뮬레이션 검증을 수행하였다. 본 연구의 결과는 타 지상실험 풍동 장비의 노즐 설계 및 다양한 발사체 노즐에 참고 가능할 것이다. Flow uniformity research in windtunnel equipment is important to increase measurement accuracy of properties on model surface. In this study, nozzle exit pressure was measured in contour nozzle that designed for shock tunnel, and simulation of nozzle flow based on nozzle pressure data has been done. The result of this study will be referenced for design various types of nozzle used ground windtunnel facility and nozzle for launch vehicle.

연구논문 : 광주지역 사회적금융 활성화를 위한 탐색적 연구

박상하 ( Sang Ha Park ) 전남대학교 지역개발연구소 2015 지역개발연구 Vol.47 No.2

사회적금융은 사회적경제를 활성화시키기 위한 기본적인 금융서비스 제공임과 동시에 지역사회 생태계 조성의 핵심적 요인이다. 1970년대 이후 복지국가 위기를 극복하는 과정에서 유럽 선진국에서는 사회적경제를 통해 빈곤퇴치와 실업률 극복 그리고 지역공동체 회복운동에 가시적인 성과를 거두고 있다. 우리나라도 2007년 법 제정과 함께 사회적경제조직의 양적 성장이 급격하게 증가하고 있다. 광주지역은 2015.3월 현재 1,000여개가 넘는 사회적경제 조직들이 활동하고 있으나, 정부 주도의 재정지원에 의존하여 자립성이 부족하다는 지적을 받고 있다. 광주지역은 인구대비 사회적경제 조직 구성 비율이 전국에서 가장 높은 비중을 차지하고 있으면서도 상대적으로 자립성이 미흡하고 자금조달과 판로개척에 어려움을 겪고 있는 것으로 나타났다. 특히, 협동조합의 경우 자금조달은 가장 큰 걸림돌이 되고 있으며 사회적경제 조직의 특수한 성격상 일반 영리은행이나 신협 및 새마을금고와 같은 지역밀착형 은행마저도 접근성이 확보되지 못하고 있다. 따라서 본 연구에서는 광주지역의 사회적금융 활성화를 위한 대안으로 단기적으로는 기존 영리은행이나 지역밀착형 금융기관을 사회적경제 전담 은행제를 실시하여 지자체와 협력하는 방법을 제안하고 있다. 또한 중·장기적으로는 지역통화와 사회성과연계채권(SIB)을 발행하거나 사회적금융 전담은행을 설립하여 활성화하는 방안을 모색하고 있다. Social finance is a basic financial services being a key factor in the community and ecosystem at the same time for activating the social economy. In Europe, developed countries in the process of overcoming the crisis, the welfare state since the 1970s reap tangible results in the social economy and local communities to overcome poverty eradication and unemployment exercise recovery. Korea also quantitative growth of the social economy organizations with the 2007 legislation has increased dramatically. Gwangju area in March 2015, but is currently more than 1,000 social economy organizations are active, most of which rely on financial support from the government-led under pointed out that the lack of independence. Gwangju area showed that the population compared with all the social and economic organization accounts for the highest percentage share in the country relative to the lack of independence and experiencing the most difficulties in funding and market reclamation. In particular, in the case of cooperatives and the biggest obstacle in financing the social economy, and even the special nature of general commercial banks, credit unions and community credit banks, such as community-based organizations, this does not ensure accessibility. In this study, in the short term, as an alternative for financing social activation of Gwangju it is offering a way to cooperate with the existing local commercial banks, community-based financial institutions to conduct social and economic dedicated bank system. There, in the long run, also seeking to enable the local currencies and issued by SIB or establish a dedicated bank social finance.

효과분석을 이용한 하이브리드차량 구동계용량 최적조합에 대한 연구

박상하(Sangha Park),이재훈(Jaehoon Lee),허승진(Seung-Jin Heo) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5

In this study, We propose the optimal combination of HEV powertrain component size. a design range of HEV powertrain component size is presented base on Vehicle longitudinal dynamics. we create 8 experiments by using design of experiments(DOE). And then, we simulate a fuel consumption, state of charge(SOC) and acceleration performance by using Green Car Virtual Integrated Development Environment (G-VIDE). We conduct Effects analysis by using Design of Experiments for HEV powertrain component size optimal combination. The optimal combination meet target longitudinal performance with low fuel consumption.

Assessment Criteria for the Effective Implementation of VR in Modern Art Exhibitions

박상하 ( Sangha Park ),이현경 ( Hyun-kyung Lee ) 한국디자인트렌드학회 2021 한국디자인포럼 Vol.26 No.1

Background Virtual reality (VR) technology is being increasingly employed in art exhibitions worldwide. There are various reasons for such implementations, of which the most prominent is that VR technology serves to attract visitors by offering novel experiences. The article aims to answer the following esearch question: how can VR technology be employed in exhibitions as an effective communication medium? The efficacy of such technology, however, differs according to its specific traits. The paper seeks to determine how one can discern between effective and ineffective VR implementations. Methods To find assessment criteria for effective VR implementation, the paper analyzes previous literature. Moreover, the paper aims to find model cases per criterion for illustration. Results This paper proposes the use of three criteria for such differentiation: interaction, immersion, and presence. Moreover, it discusses three actual exhibitions that are representative cases for each criterion. For interaction, “We Live in an Ocean of Air” is the model case, “Lee Jung Sub VR” is a well-implemented exhibition that excels at immersion, and “Björk VR” illustrates presence. Conclusion The three criteria and model cases offer valuable guidelines for assessing VR implementation in exhibitions, aiding future exhibition coordinators to use VR technology for effectively enabling interactive experiences for visitors.

극초음속 환경에서의 열보호 재료에 따른 실험 연구

박상하(Sangha Park),이현석(Hyunsuk Lee),최기혁(Gi-Hyuk Choi),박기수(Gisu Park) 한국항공우주학회 2021 한국항공우주학회 학술발표회 논문집 Vol.2021 No.11

태양광 패널 폐기물의 처리와 관리의 동향

박상하 ( Sangha Park ),김욱 ( Wook Kim ),김명선 ( Myeongsun Kim ),김연정 ( Yeonjeong Kim ),정석희 ( Sokhee P. Jung ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회지 Vol.38 No.3

Solar energy is attracting attention as a major source of renewable energy. Solar power generation has grown rapidly since the 2000s. Owing to the recent indications of a rapid increase in solar power generation wastes, it is imperative that countermeasures be implemented. Accordingly, the Korean government introduced an extended producer responsibility (EPR) system to resolve the problem of solar panel disposal and recycling; however, there are some requirements that do not reflect the domestic conditions. This paper discusses the EPR system expected to be introduced in the future and the directions of improvement of domestic laws in the treatment of solar panel wastes. First, necessary measures must be considered to prevent leakage of lead and harmful substances in landfills during waste panel treatment. Currently, most of the solar panels that are not exported are being disposed through landfills. Lead and arsenic were detected in these wastes by dissolution analysis of the solar panel samples manufactured in Korea, which shows their capacity for environmental damage. Therefore, it is necessary to improve the existing treatment methods and to prepare countermeasures against illegal disposal of solar panel wastes. Second, it is necessary to take action against enterprises responsible for demolition, transportation, and disposal of such wastes. Solar power generation facilities are generally installed by legally specified contractors, but in the case of dismantling and transporting waste panels, there are no legal designations for relevant personnel. Third, it is necessary to establish a recycling system for these wastes. Domestic solar panels are generally exported overseas, but there is uncertainty about export to overseas markets, so the domestic recycling market should be revitalized. In Korea, a recycling system is not established, and no technology is available for recycling. Therefore, research on recycling technologies and establishment of a rational system are necessary. Finally, it is necessary to extend the lifespan, improve efficiency, and increase the possibility of reusing solar panels by improving their technology. Currently, the installed photovoltaic power generation facilities are vulnerable to recycling and reuse and have short lifespans. Therefore, it is necessary to increase the lifespans of solar panels through technological developments, efficiency improvements, and focus on future reuse of the panels.

거친 표면에서의 선두부 열공력 실험 연구

박상하(Sangha Park),박기수(Gisu Park) 한국추진공학회 2020 한국추진공학회 학술대회논문집 Vol.2020 No.11

본 연구에서는 표면 거칠기가 선두부의 열 · 공력 환경에 미치는 영향을 실험적으로 검토하였다. 실험은 마하 6 유동의 충격파 터널 설비를 이용해 수행됐다. 본 실험을 통해 측정된 결과 중 정체점에서의 선두부 모델 표면 압력 및 열전달량은 등엔트로피를 가정한 이론 계산을 통한 비교를 통해 검증하였다. 실험 데이터를 고려하였을 때, 매끄러운 벽면과의 거친 벽면 케이스에 대해 표면 압력의 경우 큰 변화를 보이지 않았으나, 열전달량에서 현저한 차이가 나타났다. In this study, the influence of surface roughness on the forebody aerothermodynamics has been examined experimentally. The experiment was conducted using a shock tunnel facility at a freestream nominal Mach number of 6. The measured surface pressure and heatflux at the stagnation point were compared with that of theoretical analysis based on the isentropic assumption. Considering the experimental data, a small difference is seen in the surface pressure, however a noticeable difference in the variation of surface heatflux was found for the rough wall case than that of the smooth wall.