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재생사업지구 내 공가 및 공터 활용을 통한 유연적인 도시재생 방안 연구
안현진(An, Hyunjin),박현영(Park, Hyeon-Young) 대한국토·도시계획학회 2013 國土計劃 Vol.48 No.6
This paper aims at inducing implications from overseas cases, related to urban regeneration strategy, and has focused on considering vacant real estates as productive rather than useless. In order to make this study successful, this research explore ‘temporary uses’ and ‘tactical urbanism’ as theory, and ‘Community Gardens’, ‘Site Pre-Vitalization’, ‘Pop-up Town Hall’, and ‘Temporary Urbanism Initiatives’ in Washington D.C. as cases. They support temporary, ephemeral and experimental land use and small-short term projects for urban regeneration. This approach can contribute to urban regeneration as ‘bottom-up’ planning instruments and encourage participation. In addition, temporary uses permit a trial-and-error as incremental planning approach. When these done well, such small-scale changes may be conceived as the first step in realizing lasting change. In Korea, due to economic recession a lot of urban regeneration projects have stopped and abandoned empty property gave rise to many problems. Now we need to think differently, and allow ‘temporary uses’ for urban regeneration strategy.
젠더관점에서 살펴본 도농지역 캠퍼스타운의 야간 보행환경 - CPTED 사업과 가로 조명을 중심으로 -
안현진(An, Hyunjin),정혜영(Chung, Hyeyoung),장지인(Chang, Ji-in) 대한건축학회 2020 대한건축학회논문집 Vol.36 No.12
This study examines the night-time walking environment before and after a government-led CPTED project implemented in a urban-rural campus town in Jochiwon-eup, Sejong City. The purpose of the study is to investigate gendered differences in perception of safety as students walk from their off-campus housing to the university. The research methods include questionnaire surveys of university students before and after the implementation of the CPTED project, and an analysis of streetlight illumination measurements after dark. The results are as follows. First, survey results reveal that students’ awareness of the CPTED project as well as students’ perception of safety were low, with twice as many female students feeling unsafe compared to male students. Second, students’ preference of the brightest lit route resulted in more foot traffic relative to other routes. Female students showed greater preference and concentrated use relative to male students. While male students also preferred the brightest lit route, their paths were more varied compared to female students. Third, even though measurements of the illumination levels of streetlights were found to comply with CPTED guidelines, the failure to address blind spots, such as dark spaces between streetlights, under tree branches, and dark winding street corners, contributed to a low sense of safety while walking at night-time. To substantially increase sense of safety, especially among female student, brighter street lights need to be accompanied by a comprehensive effort to eliminate blind spots and dark corners.
안현진(Hyunjin An),조성주(Sung Ju Cho),오새라(Saera Oh),정재민(Jae-Min Jung) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.7
Lycorma delicatula는 꽃매미로 알려져 있으며, 베트남, 인도, 남중국과 같은 동남아시아의 토착 해충이다. 꽃매미는 한국에 유입되어 최근 몇 년간 급속히 퍼져 특히 과일 나무에 피해를 입히고 있다. 본 연구의 목적은 Lycorma delicatula의 사례를 이용하여 미발생 병해충 영향 분석을 위한 연구방법과 추정 결과를 제시하는 것이다. 본 연구에서는 Lycorma delicatula 발생으로 인한 농가의 직접소득감소를 측정하기 위해 부분예산(partial budget) 방법을 사용하였고, 해충 발생으로 인한 사회후생 변화를 조사하기 위해 부분균형(partial equilibrium) 모형을 사용하였다. 또한 병해충 발생 적합도를 고려한 다양한 기후 시나리오 하에서 Lycorma delicatula 발생 위험이 농가소득에 미치는 영향을 추정하였다. 기후변화가 지속됨에 따라 국내 생태계는 점점 돌발 외래 병해충에 취약해질 것으로 예상되며, 이에 따른 경제적 피해는 더욱 증가할 것으로 전망된다. 나아가 이 연구는 향후 국가 해충 방제 및 검역 시스템의 효율성 평가의 기반이 될 수 있을 것으로 기대된다. Lycorma delicatula, known as spotted lanternfly, is a planthopper native to Southeast Asia, including Vietnam, India and South China. This species damages local fruit trees and has spread rapidly in South Korea in recent years. The purpose of this study is to present the methods and estimation results pertaining to the risk of invasive species like Lycorma delicatula. We used a partial budget (PB) method to assess direct income reduction of farm households and a partial equilibrium (PE) model to examine social welfare change from the outbreak of Lycorma delicatula. We also estimated the future economic impacts of Lycorma delicatula under various climate scenarios considering habitat suitability. As climate change progresses, domestic ecosystems are expected to become increasingly vulnerable to pest outbreaks leading to further economic damage. We believe that this study can be a base to evaluate efficiency of the national pest control and quarantine system.
실물옵션법을 이용한 산림 바이오매스 열공급 시설의 투자 분석
안현진 ( Hyunjin An ),민경택 ( Kyungtaek Min ) 한국산림과학회 2021 한국산림과학회지 Vol.110 No.3
기후변화 대응과 탄소중립 실현을 위해 산림 바이오매스의 에너지 이용은 중요한 과제이다. 이 연구의 목적은 목재칩 보일러를 주력으로 사용하는 산림에너지자립마을의 투자 타당성을 분석하고 시설의 지속적 운영을 위해 필요한 적정열 보조금 수준을 산출하는 데 있다. 분석을 위해 순현재가치법과 선택의 유연성을 고려한 콜옵션 가격결정모형을 이용하였다. 분석결과에 따르면, 현재와 같이 국비 50%를 지원하고 전력에만 REC를 인정하면 산림에너지자립마을의 순현재가치와 내부수익률은 모두 음(-)이며, 실물옵션 모형으로 평가한 투자가치도 0으로 나타났다. 따라서 에너지 시설의 지속적 가동을 위해 정부 보조금이 필요하다. 시뮬레이션을 통해 사업의 옵션가치를 0보다 크게 만드는 열보조금 수준을 도출하였는데, 최소 0.0248원/kcal으로 나타났다. The energy use of forest biomass is crucial to deal with climate change and achieve the carbon-neutral goal. This study aims to analyze the economic feasibility of forest biomass thermal energy facilities and calculate the optimal subsidy level of heat supply to ensure continued operation of the facilities. To achieve this aim, the net present value approach (NPV) and call option price model are adopted considering wood chip price volatilities. The Forest Energy Self-Sufficient Village Project financed by Korea Forest Service is considered as the research case study. In our analysis, when 50% of the initial investment is given to the subsidies and RECs are applied to only power generation, NPV and IRR are both negative and the investment value using the real option model is also zero. We concluded that some heat subsidies should be acknowledged to keep the facilities operating. Besides, the simulation results reveal reliable economic values when the heating subsidy is priced at KRW 0.0248 per kcal.
Hand Gesture Recognition system using TOF Camera
안현진(Hyunjin An),이진석(Jinseok Lee),김대진(Daijin Kim) 한국HCI학회 2011 한국HCI학회 학술대회 Vol.2011 No.1
This paper proposes methods for detecting hands and fingertips using depth data acquired by a 3D time of flight (TOF) camera. This camera was located below the hands, facing them. We can recognize hand gesture to use the z-axis distance difference between two hands from the 3D camera and the number of hands and fingers. Result of controlling a car racing game using our suggested algorithm shows 96 % accuracy of five hand postures. Our detection system of hands and fingertips is more accurate and less sensitive illumination than other hand detection systems, so our hand gesture system will be useful in new user interfaces to gives users immersion and reality.