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강상준,이상헌,김주용,Kang, Sang-Joon,Yi, Sang-Heon,Kim, Ju-Yong 한국제4기학회 2009 제사기학회지 Vol.23 No.2
제천 의림지는 홀로세말에 형성된 호소로서 중부 내륙지역의 수문, 기후 및 식생변천 연구를 수행하기 위한 최적의 퇴적체를 포함하고 있다. 의림지 호소 퇴적체 중 ER3-1호공에서 AMS 탄소동위원소 연대측정 자료를 수반한 퇴적상과 화분군집산출상을 검토하여 고기후와 수문환경변화를 해석하였다. ER3-1호공의 고도 307.5m~309.5m 구간은 약 1,920 yrBP~1,420 yrBP 기간에 안정한 퇴적체를 보이며, 이 상부에는 과거 약 2000년 전 후에 재동된 퇴적물이 분포한다. 본 시추공의 화분군집산출을 보면 목본화분으로 소나무속, 참나무속이 우점한 것으로 보아 현존식생과 거의 유사한 식생환경으로 추론된다. 전반적으로 천변에는 오리나무속, 물푸레나무속, 버드나무속과 같은 호습윤성 교목이 생장했으며, 호안에는 부들, 수련, 고마리 등 수서식물이 생육했던 것으로 해석된다. 문화편년으로 볼 때 의림지는 청동기~철기시대 및 고대사회 초기에 축조되었던 것으로 추정된다. 의림지 입지환경과 호저 퇴적체에서 나타나는 양상은 약 3,200 yrBP~200 yrBP 기간 동안 전반적으로 서늘하고 건조한 시기(Cool and dry period)가 우세한 환경 하에서 참나무속-소나무속-전나무속을 우점으로 하는 식생군락이 형성되었던 것으로 보인다. AMS radiocarbon dates indicated that Eurimji reservoir, located at Jecheon City, Chungbuk Province, has been formed during the late Holocene Epoch. The sedimentary sequence at bottom reveals histories in hydrology, climate conditions and past vegetation dynamics. Ages controlled sedimentological and palynological analyses on ER 3-1 Core contribute to reconstruct paleoclimate and past hydrological conditions. These analyses suggest that lower interval (307.5m~309.5m elevations) of the ER 3-1 Core was deposited in stable from 1,920 yrBP to 1,420 yrBP, but upper layer sediment above these elevations was composed of reworked sediments during the pre and post 2,000 yrBP. Pollen assemblage indicates that watershed vegetation of the Eurimji reservoir, during the period of 1,920 yrBP~1,420 yrBP, was closely comparable to modern vegetation dominated Pinus and Quercus mixed vegetation. Also, riparian including Alnus, Fraxinus and Salix were inhabited along the banks of stream, and aquatics such as Typha, Nymphaea and Persicaria flourished at shore of the reservoir. According to cultural chronicle, it infers that the Eurimji reservoir was formed from the Bronze Age to the Iron Age or the beginning of ancient society. An integrated data suggested that Quercus-Pinus-Abies mixed forest flourished under cool and dry climate conditions during 3,200 yrBP~200 yrBP.
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강상준,S. J. Ha,Heedong Kang,박환배,J. H. So,Jinho Moon,Sihhong Doh,Kyeryung Kim,김성환,김홍주 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.5
We grew a CsI:CO3 single crystal with a concentration of CO3 of 0.02 mole percent by using the Czochralski method. We cut the crystal into a size of 10.3 mm in diameter and 10.9 mm in length. We investigated the luminance characteristics of the CsI:CO3 crystal including the fluorescence decay time, the energy resolution and the pulse height spectrum, by using a 661-keV γ-ray source. The light response of the CsI:CO3 crystal was measured for a proton beam in the energy range from 11 MeV to 36 MeV by using the MC-50 cyclotron at the Korea Institute of Radiological and Medical Sciences (KIRAMS) with different thicknesses of aluminum degraders. We estimated the energies of the proton beam after passing through the degraders and 190-cm-thick air by using a Monte Carlo simulation based on the Geant4 simulation toolkit. We show that the scintillation response of the CsI:CO3 crystal to a proton beam in the above energy range is approximately linear.
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Measurement of Proton Beam Energy and Flux by Using a LYSO Crystal
강상준,김홍주,박환배,Heedong Kang,J. H. So,Kyeryung Kim,Sihhong Doh,Sungwhan Kim 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.3
We investigated the beam profiles of the 45-MeV proton beam from the MC-50 cyclotron at Korea Institute of Radiological and Medical Science. We used a 45-MeV proton beam of 0.2-nA beam current to measure the beam energy and flux. The 45-MeV proton beam passed through a 0.2-cm thick aluminum window capping the beam pipe and then was collimated to a 1-mm-diameter beam spot by using a 1-mm aluminum collimator. We examined the dependence of the energy profile of the proton beam on the transverse distance from the beam center by using the LYSO crystal scintillator. Also, the flux of the proton beam was measured with the LYSO crystal scintillator. Accurate information on the energy profile of the beam is important not only for understanding the characteristic of the beam but also for understanding the light output response of a scintillation crystal. From our investigation, the energy profiles of the beam at the near point from the center and some distance points from the center were found to be very different. Thus, it is very important to test the energy profile of the beam at the point where the detector will be located before one performs the beam test for a detector, such as a silicon sensor.
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연구논문 : 도시유형에 따른 저탄소 도시계획요소 간의 상대적 중요도
강상준 ( Sang Jun Kang ),정주철 ( Ju Chul Jung ),권태정 ( Tae Jung Kwon ) 한국환경정책학회 2010 環境政策 Vol.18 No.1
The main purpose of this study is to explore the relative importance of urban planning elements that have been introduced as carbon reduction tools. Recently, low carbon city developments have widely burgeoned in the Republic of Korea. It is, however, in question what would be the feasible elements to be implemented in each different kind of urban and rural settings. The relative importance weights of the elements are obtained by using AHP(Analytical Hierarchy Process) method with the purposive samples of 38 professionals in the urban planning fields (CR=0.008~0.0114). The results show that the important planning elements for carbon reduction are environment-friendly land use (0.283) and green transportation (0.24) for new urban development; green transportation (0.275) and energy efficiency increment (0.230) for existing urban area on flatland; ecosystem (0.248) and environment-friendly land use (0.210) for existing urban area on hillside; ecosystem (0.299) and environment-friendly land use (0.238) for existing rural area on flatland; and ecosystem (0.326) and environment-friendly land use (0.204) for existing rural area on hillside. These findings imply that site characteristics should be interpreted throughly and the low carbon elements must be revisited and implemented with relative priority.
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강상준 ( Sang-jun Kang ),김기중 ( Ki-joong Kim ),최다영 ( Da-young Choi ),이명석 ( Myung-seok Lee ),정민철 ( Min-chul Chung ),안호근 ( Ho-geun Ahn ) 한국환경기술학회 2009 한국환경기술학회지 Vol.10 No.2
본 연구에서는 미분 활성탄과 숯에 바인더를 혼합하여 활성탄 보드를 성형하고, 흡착성능을 조사하여 실내 오염물질 제거용 흡착보드로의 활용가능성을 알아보았다. 흡착성능은 휘발성유기화합물(VOC)인 벤젠, 톨루엔 및 자일렌과 포름알데히드(HCHO)를 대상으로 하여 유통식 흡착장치에서 조사하였다. 제조한 활성탄 보드는 평균 세공크기는 거의 변화하지 않았지만, 미분활성탄과 숯의 혼합비율에 따라 비표면적과 세공부피와 같은 물리적 특성은 변화하였다. 이는 첨가된 숯이 혼합하는 과정에서 미세하게 파쇄되어 원료 활성탄의 미세세공에 침투하여 물성에 영향을 미치는 것으로 생각되었다. 활성탄 보드의 톨루엔에 대한 흡착성능은 원료 활성탄에 비해 다소 감소하였지만 미분활성탄 자체의 흡착성능 이상을 유지하였다. 흡착물질 중에서 톨루엔이 모든 활성탄보드에 가장 많이 흡착하는 결과를 보였다. 활성탄 보드의 흡착량과 물성과의 상관관계는, 다른 비율로 혼합한 미분활성탄과 숯의 영향으로 비슷한 세공구조를 가지지 못해 뚜렷하지 않았다. 결과적으로 입상활성탄에 미분활성탄과 숯을 적당량 혼합하여 제조한 활성탄 보드는 실내의 휘발성유기화합물과 포름알데히드를 제거하기 위한 친환경 흡착소재로 활용할 수 있음을 알았다. In this paper, well-being typed activated carbon sheets were prepared by mixing powdered activated carbon and charcoal with three types of granular activated carbon. The sheets were aimed to apply to removal of indoor pollutants. Adsorption performance of the sheets for benzene, toluene, xylenes, and formaldehyde was investigated using flow-typed experimental apparatus. Average pore size of the sheets did not change, but physical properties such as specific surface area and pore volume were changed according to the mixed amounts of powdered activated carbon and charcoal. This fact suggests that penetration of fine charcoal formed during its mixing process into micropore of granular activated carbon might change its physical properties. Adsorption performance of the sheets was not higher than that of granular activated carbon, but was over or similar to that of powdered activated carbon. The prepared sheets were most favorable to adsorption of toluene. Close correlation between adsorbed amounts and physical properties was not obtained because pore structure of the sheets did not similar to each other. As a result, it was considered that the activated carbon sheets prepared by mixing powdered activated carbon and charcoal properly could be used as an eco-material for improving indoor air quality.
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강상준(Kang, Sangjun) 한국방재학회 2017 한국방재학회논문집 Vol.17 No.1
본 연구는 홍수로 인한 건물침수지역과 시가지 유형 사이에 어떠한 관계성이 존재하는가에 대한 실증분석을 목적으로 한다. 강원도 강릉시를 대상으로 Morphological Spatial Pattern Analysis(MSPA)를 이용하여 분석한 결과 2006년 강릉시 시가지 내주택침수지 총 681개는 각 시가지 유형별로 다음과 같이 분포하고 있는 것으로 나타났다: 군집형(Core) 60개소(8.8%), 교량형 (Bridge) 82개소(12%), 경계형(Edge) 66개소(9.7%), 가지형(Branch) 88개소(12.9%)가 입지하고 있었다. 그리고 가장 많은 385개소 (56.5%)는 섬형(Islet)의 시가지 유형을 갖는 시가지에서 관찰되었다. 즉 시가화지역 내 주택침수 대다수는 Islet 지역, 즉나 홀로 건축물, 에서 발생하는 것으로 나타났다. 이는 나 홀로 건물들은 도시홍수에 취약할 수 있음을 암시하고 있으며 이러한 관찰에 대한 설득력 있는 근거 제시는 추후연구를 통해 검증될 필요가 있다. 다만 현 시점 도시홍수 대책으로서나 홀로 아파트ㆍ주택의 침수대책은 고려할 필요가 있다. The purpose of this research is to investigate, empirically, the relationship between developed area types and flooded buildings due to urban flooding. The employed method is Morphological Spatial Pattern Analysis(MSPA) for the city of Gangneung by using flooding records for the year of 2006. The findings are as follows; The total 681 flooded buildings are located in each different type of developed area. 60 buildings(8.8%) are found in Core, 82(12%) in Bridge, 66(9.7%) in Edge, 88(12.9%) in Branch. The rests(385, 56.5%) are found in Islet. It means that buildings located in the fragmented type of developed area could be susceptible to urban flooding and the findings are required to be validated for the following researches. The results imply the importance of the needs of stand-alone buildings to minimize flooding damages.
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