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황재홍,지광훈,정원석,홍영국,류근호,Hwang, Jae-Hong,Chi, Kwang-Hoon,Cheong, Won-Seok,Hong, Yong-Kuk,Ryu, Keun-Ho 대한자원환경지질학회 2007 자원환경지질 Vol.40 No.2
이 연구의 목적은 최근까지 발행된 국내 화강암 연구에서 측정된 화강암 분석 자료를 저장, 관리, 도시할 수 있는 지질정보시스템(GIS; Geological Information System)을 개발하는 것이다. 아직 국내의 화강암 분석 자료는 표준화 되지 않고 하나의 자료로써 취합되어 있지 않기 때문에 이를 이용하는데 효율성이 많이 떨어지는 실정이다. 따라서 참고문헌 수집을 통한 표준화된 데이터베이스(database)를 구축하여 이를 여러 연구자에게 제공할 필요가 있다. 이를 위하여 우선 지난 30여 년간 국내 화강암에 대한 다양한 분석 자료를 종합 정리할 필요가 있다. 따라서 지질도에 암석 분포 및 지질구조 심볼(기호)의 표준화 뿐만 아니라, 표준화된 여러 분석치도 첨부하여 제시함으로써 그 활용성을 높이고자 한다. 화강암 정보의 주요내용은 광물비율, 주성분 원소, 미량 원소 및 희토류 원소 분석 자료이다. 이를 통하여 시스템이 다양한 질의를 수행할 수 있었으며, 이에 따른 통계분석 및 시각적 도출이 가능했다. The purpose of this research is to develop a Geological Information System(GIS) in order to store, manage and display geochemical data observed from references of recently domestic granite. There is still no use in geochemical and mineralogical information such as REE(rare earth element), trace elements, mode data(modals or mineral composition) and major elements. Therefore, we need to construct the standardized database system for the analytical data of granites through the verification of its data in South Korea. To construct the information system for geochemical and mineralogical information of granites in South Korea. Firstly, we collected the existing research data related digital map data. Secondly, we extract granite polygons to digital geological map and convert the polygon to points in South Korea. Thirdly, we considered both database schema and symbols of REE elements, trace elements, modal data and major mineral. Fourthly, we carried out all sorts of process to build granite database for GIS statistic analysis and visualization.
황재홍,이승엽,박관수,정기훈,전인성,윤규호,Hwang, Jae-Hong,Lee, Seung-Yeop,Park, Kwan-soo,Jeong, Ki-Hoon,Jeon, In-seong,Yoon, Kyu-Ho 대한악안면성형재건외과학회 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.4
The mucoepidermoid carcinoma is classified as either well, moderately, or poorly differentiated. The criteria used to classify the lesions are discussed, and pathologic features are illustrated. The most important factors in prognosis are : 1. degree of histologic differentiation, and 2. presence or abscence of tumor on the lines of surgical excision. Recurrences rates are correlated with histologic differentiation. Stewart, Foote, and Becker in 1945 coined the term "mucoepidermoid tumor" to discribe an unusual salivary neoplasm containing epidermoid and mucus-secreting cells which was thought to arise in salivsary gland ducts. The treatment of the mucoepidermoid carcinoma is chiefly surgical, although recent data have shown favorable responses to radiation therapy. Currently, surgery followed by radiation treatment is recommended for intermediate-grade and high-grade tumors ; low-grade tumors can be managed by surgery alone. Authors present a case of mucoepidermoid carcinoma managed with wide surgical resection and postoperative irradiation and showing a good clinical result with review of literatures.
프리캐스트 아치형 개착식 터널의 역학적 거동에 관한 수치해석
황재홍,Hwang, Jae-Hong 한국터널지하공간학회 2009 한국터널지하공간학회논문집 Vol.11 No.3
아치형 개착식 터널은 종래의 박스형 개착식 터널과 비교하여 외력에 따른 축력으로 지지하는 형식이므로 보다 얇은 부재로 시공이 가능하고, 구조물 특성상 적절한 변형에 의하여 지반반력을 기대할 수 있어 역학적으로 우수한 구조물로서 최근 프리캐스트화되어 그 시공실적이 증가하고 있는 추세이다. 그러나 프리캐스트 아치형 개착식 터널은 굴착식 터널 및 박스형 개착식 터널 등과 시공방법과 형상이 상이하여 구조물 주변 지반응력 거동이 다르며, 이는 터널구조물 단면설계시에 반영 되어야만 하는 중요한 사항이다. 따라서 본 연구에서는 프리캐스트 아치형 개착식 터널의 시공과정을 고려하여 유한요소해석을 실시하여, 지반과 구조물간 상호작용을 고려한 아치형 개착식 터널의 역학적 거동에 대하여 검토하였다. The thickness of the material can be thinned because arch cut-and-cover tunnel has the support mechanism by the axial force, and the ground reaction force due moderate deformation can be expected thereby making it be dynamically advantageous, therefore the arch cut-and-cover tunnel has become more widely used. An important characteristic of the arch cut-and-cover tunnel is that the thickness of the material can be thinned because precast arch type has the support mechanism by the axial force. However, there is a different stress state surrounding the structures between normally excavated tunnels and cut-and-cover tunnels, it should be considered at designing. Therefore, finite element method was carried out to examine the mechanical behavior of the precast arch cut-and-cover tunnel considering construction procedure.
GIS를 이용한 낙동강-금호강 합류부의 2차원 유한요소해석
황재홍 ( Jae Hong Hwang ),한건연 ( Kun Yeun Han ),남기영 ( Ki Young Nam ),최승용 ( Seung Yong Choi ) 한국지리정보학회 2009 한국지리정보학회지 Vol.12 No.3
Usually in flood flow problems, one-dimensional approach does not provide the required details of complex flow phenomena such as the flow in braided rivers and river junction. In this study, two-dimensional finite element mesh is constructed using DEM and GIS tool, and applied to RMA-2model. The purpose of this study is to investigate the applicability of the two dimensional model in natural rivers and to analyze characteristics of river flow due to the change of cross section. For model calibration, the result of unsteady flow analysis was compared with the observed data. Accordingly, the SMS model in this study prove to be very effective and reliable tool for the simulation of hydrodynamic characteristics under the various flow conditions.
황재홍(Hwang Jae-Hong),안병주(An Byung-Ju),김희율(Kim Whoi-Yul),김재준(Kim Jae-Joon) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(계획계)
As buildings which people achieve each function seeking convenience today that change rapidly are integrated, buildings are wearing new aspect. As mutual relation is embossed notedly with link of building interior by development that seek developers' profitability deviation lowering, is resulting various kinds problem. Hereupon this research these present state using Space syntax program space structure of large size composition shopping mall taking advantage of little more quantitative data analyzing comparison forward about new development direction and hereafter research propulsion direction present wish to.
빅셀커넥션과 포스트 케인지언 - 유사 화폐경제학과 진정한 화폐경제학?
황재홍(Hwang Jae Hong) 한국사회경제학회 2007 사회경제평론 Vol.- No.28
레이욘후푸드에 의해 빅셀커넥션이라고 명명된 1920-30년대 거시이론은 대부분 현대 주류 거시경제학으로 이어지지 못했다. 레이욘후푸드는 그 계기중 하나로 케인즈의 『일반이론』의 출간 그리고 케인즈의 IS-LM식 해석 등을 지적하면서 이자율의 시점간 오조정을 통해 경기변동을 설명하려는 빅셀커넥션의 이론틀을 다시 살려야 한다고 주장하고 있다. 이와 달리 포스트 케인지언은 케인즈의 IS-LM식 해석에 반대하면서도 빅셀커넥션의 부활이 아닌 케인즈의 고유의 이론을 부각시키며 빅셀커넥션과의 차별화를 시도하고 있다. 근본적인 불확실성을 강조하는 포스트 케인지언의 이론 체계는 조정실패를 강조하는 레이욘후푸드(또는 빅셀커넥션)의 이론체계와는 화해가 어려울 정도의 이질적인 것이라는 일반적인 인식과 달리 빅셀커넥션과 케인즈의 구체적인 화폐경제학 내용에는 상당한 유사성이 존재하고 있음을 확인할 수 있다 Most macroeconomic theories in 1920-30s, which Leijonhufvud defined as "Wicksell Connection", disappeared in modern macroeconomic textbooks. Leijonhufvud regards General Theory and IS-LM system as the main factors which brought about these consequences, and makes a case for revival of Wicksell Connection, which puts heavy stress on the idea of maladjustment of the interest rate. Although Post-Keynesian are very critical of IS-LM, they also make an attempt to distinguish Keynes from Wicksell Connection. This paper argues that the foundation of Post Keynesian theoretical system (Fundamental Uncertainty) may be irreconcilable with that of Wicksell Connection (Coordination Failure). Nevertheless concrete monetary theories of both schools have much more similarities than is usually expected.
낙엽송림과 리기다소나무림 벌채지 내 토양 특성과 식재된 소나무 및 낙엽송 묘목의 초기 생장 비교
황재홍 ( Jae Hong Hwang ),양아람 ( A Ram Yang ),송선화 ( Sun Wha Song ),조민석 ( Min Seok Cho ) 한국산림과학회 2013 한국산림과학회지 Vol.102 No.3
The objectives of this study were to compare soil physical and chemical properties and early growth of Pinus densiflora and Larix kaempferi seedlings in harvested Larix kaempferi and Pinus rigida stands. Study stands were located in harvested L. kaempferi (Yeongju) and Pinus rigida (Wonju) plantations. Seedlings of L. kaempferi (1-1) and P. densiflora (1-0) were planted in April, 2008, Yeongju. Also, seedlings of L. kaempferi (1-1) and P. densiflora (1-1) were planted with the density of 3,000 seedlings/ha in April, 2010, Wonju. We analyzed soil physical and chemical properties and the relative growth rate of seedlings using diameter at root collar and seedling height. Soil organic matter, total nitrogen and available phosphorus concentrations in harvested P. rigida stand were significantly higher than those in harvested L. kaempferi stand. The relative growth rate of P. densiflora seedlings with former stands were not significantly different. The relative growth rate of diameter at root collar of L. kaempferi seedling in harvested P. rigida stands were significantly higher than that in harvested L. kaempferi stand. Higher concentrations of organic matter, total nitrogen and available phosphorus in harvested P. rigida stand was probably positively affect to the early growth of seedlings.