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강인석,김창학,손창백,박홍태,Kang In-Seok,Kim Chang-Hak,Son Chang-Baek,Park Hong-Tae 한국건설관리학회 2001 한국건설관리학회 논문집 Vol.2 No.2
본 연구에서는 프로젝트의 성공적 이행을 보장하기 위하여 리스크분석모델을 제안하였다. 리스크분석 모델은 CRAS라 칭하였으며, 시공자가 RBS를 통해서 리스크를 체계적으로 확인하고 분석하고 관리하는데 도움을 줄 수 있도록 설계되었다. 제안된 CRAS모델은 크게 3단계의 분석과정으로 이루어진다. 첫 단계는 시공자가 프로젝트와 관련된 리스크를 확인하고 분석해서 입찰여부를 판단하는 것이다. 두 번째 단계는 영향도, 의사결정나무, Monte Carlo 시뮬레이션을 이용하여 리스크를 정량적으로 평가하여 예비비를 산정하는 것이며, 세 번째 단계는 확률 노드, 확률 칼렌다 등의 일정관리기법과 시뮬레이션을 통해 공사일정상의 리스크를 파악하여 프로젝트의 성공여부를 판단하는 것이다. 결과적으로 본 모델은 시공자로 하여금 프로젝트에 내재된 리스크가 프로젝트의 공기와 공사비에 미치는 영향을 정량적으로 평가할 수 있도록 함으로서 시공자가 이들 리스크를 제거하는데 필요한 여러 대안을 고려할 수 있도록 하였다. This research proposes a new risk analysis model in order to guarantee successful performance of construction projects. The risk analysis model, called Construction Risk Analysis System(CRAS), is introduced to help contractors Identify project risks through RBS and through the procedures in risk analysis model. The proposed CRAS model consists of three phases. First step, CRAS model can help contractors decide whether or not they bid for a project by analysing risks involved in the project. Second step, the influence diagraming, decision tree and Monte Carlo simulation are used as tools to analyze and evaluate project risks quantitatively. Third step, Monte Carlo simulation is used to assess risk for groups of activities with probabilistic branching and calendars. Consequently, it will help contractors identify risk elements in their projects and quantify the impact of risk on project time and cost.
전기도금법을 이용한 FCCL용 구리박막 제조시 레벨러의 영향 연구
강인석,구연수,이재호,Kang, In-Seok,Koo, Yeon-Soo,Lee, Jae-Ho 한국마이크로전자및패키징학회 2012 마이크로전자 및 패키징학회지 Vol.19 No.2
최근에 전자 산업 분야에서 장치의 고용량을 구현 하기 위해 구동 drive IC의 선폭은 좁아지고 집적도는 증가하고 있다. 이러한 반도체, 전자 산업 분야의 초소형화, 고밀도화에 따라 FCCL(Flexible Copper Clad Laminate)의 표면 품질이 더욱 중요해 지고 있다. FCCL의 표면 결함으로는 돌기, 스크레치, 덴트 등이 있다. 특히 돌기가 표면에 존재할 경우 후속 공정에서 쇼트와 같은 불량을 유발할 수 있으며, 제품의 품질 저하를 야기 시킬 수 있다. 하지만 표면에 돌기가 존재한다 하더라도, 전해액의 레벨링 특성이 우수하다면 돌기의 성장을 막을 수 있다.평탄하고, 결함이 없는 도금표면을 얻기 위해서는 첨가제의 역할이 필수적이다. 평탄한 구리 표면을 형성하기 위해서 stock solution에 가속제, 억제제, 레벨러를 첨가하였다. 레벨러를 첨가하는 이유는 평탄한 표면을 얻고, 돌기의 형성을 억제하기 위함이다. 구리도금 표면 형상을 향상시키기 위한 레벨러로는 SO(Safranin O), MV(Methylene Violet), AB(Alcian Blue), JGB(Janus Green B), DB(Diazine Black) and PVP(Polyvinyl Pyrrolidone)가 사용되었다. 도금 첨가제와 도금 조건의 변화를 통해 도금시레벨링 특성을 향상시키고, 레벨링 특성 측정을 위해 니켈 인공돌기를 제작 한 후 레벨링 특성을 측정하였다. In recent days, the wire width of IC is narrowed and the degree of integration of IC is increased to obtain the higher capacity of the devices in electronic industry. And then the surface quality of FCCL(Flexible Copper Clad Laminate) became increasingly important. Surface defects on FCCL are bump, scratch, dent and so on. In particular, bumps cause low reliability of the products. Even though there are bumps on the surface, if leveling characteristic of plating solution is good, it does not develop significant bump. In this study, the leveling characteristics of additives are investigated. The objective of study is to improve the leveling characteristic and reduce the surface step through additives and plating conditions. The additives in the electrodeposition bath are critical to obtain flat surface and free of defects. In order to form flat copper surface, accelerator, suppressor and leveler are added to the stock solution. The reason for the addition of leveler is planarization surface and inhibition of the formation of micro-bump. Levelers (SO(Safranin O), MV(Methylene Violet), AB(Alcian Blue), JGB(Janus Green B), DB(Diazine Black) and PVP(Polyvinyl Pyrrolidone) are used in copper plating solution to enhance the morphology of electroplated copper. In this study, the nucleation and growth behavior of copper with variation of additives are studied. The leveling characteristics are analyzed on artificially fabricated Ni bumps.
경계적분법을 이용한 2차원 영역에의 직교좌표계 구성 및 응용
강인석,배진찬,노동수 ( In Seok Kang,Jin Chan Bae,Dong Soo Noh ) 한국화학공학회 1991 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.29 No.4
A new numerical scheme, which is expected to be applied for numerical analyses of various engineering problems, is proposed for the orthogonal grid generation in an arbitrary 2-D domain. The scheme is robust and non-iterative, and based on the conjunction of boundary integral technique and the covariant Laplace equation method. In the scheme, two types of problems are considered: 1) The distortion function is specified in the product form f(ξ,η)=Π(ξ)Θ(η) or 2) Boundary correspondence is specified on the two adjacent sides of the boundary. The scheme has also been tested for various application problems, and it has been confirmed that the scheme is very successful.
웨브벽체의 형상비가 T형벽체의 플랜지 유효폭에 미치는 영향
강인석(Kang.In-Seok),천영수(Chun. Young-Soo),윤영호(Yoon. Young-Ho),양지수(Yang. Ji-Soo) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.7
This paper deals with the effect of the web wall's aspect ratio to the effective flange width of the T-shaped wall. In<br/> this study, the non-linear FEM analysis has been conducted in a parametric way, by varying heigth of the wall, length<br/> of the web wall, thickness of the flange wall and aspect ratio of the T-shaped wall. The results of the analysis clearly<br/> indicate that the most influential variable on the effective width is the web wall's aspect ratio and most of existing<br/> formulae to compute the effective flange width of the T-shaped wall based on a specified variable are not effective, since<br/> these formulae do not consider the web wall's aspect ratio.<br/> Based on the results of FEM analyses, the method to compute the effective width of the flange wall is suggested, and<br/> the validity of the proposed method is confirmed.
윤양호(Yang Ho Yoon),강인석(In Seok Kang),박종식(Jong Sick Park) 전남대학교 수산과학연구소 2012 수산과학연구소논문집 Vol.20 No.-
A characteristics of seasonal variations of water type and chlorophyll a concentration were carried out in Jangsu Bay, where located middle parts of Southern Sea of Korea during for seasons from May 2006 to February 2007. Water temperature, salinity and chlorophyll a concentration measured by submersible Fluorometer (Alec Co., ACL 1151-D) in site from surface to bottom layer. Seasonal changes of water type show to lower water temperature and high salinity in winter, but high temperature and lower salinity in summer. especially the high ranges of water temperature and salinity. chlorophyll a concentration at surface fluctuated with an annual mean of 2.61 ㎍/L between the lowest value of 1.22 ㎍/L in summer and autumn, and the highest value of 7.03 ㎍/L in spring. And the chlorophyll a for the seasons ranged from 2.01 ㎍/L (5m layer) to 7.03 ㎍/L (surface) with the mean value of 4.08 ㎍/L (surface) in spring, from 1.22 ㎍/L (surface) to 8.81 ㎍/L (2m layer) with the mean value of 4.30 ㎍/L (5m layer) in summer, from 1.22 ㎍/L (surface) to 1.65 ㎍/L (bottom) with the mean value of 1.44 ㎍/L (10m layer) in autumn, from 1.58 ㎍/L (surface) to 5.43 ㎍/L (bottm) with the mean value of 3.09 ㎍/L (10m layer) in winter. Expecially, chlorophyll a of surface and subsurface in the increasing temperature seasons was higher more than middle and bottom layers, but chlorophyll a of 10m and bottom layers in decreasing temperature seasons was more than surface and middle layers. Potential primary prodution by chlorophyll a concentration in Jangsu Bay that there are very higher all the year round.