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최호근(Choi Ho-Keun) 한국제노사이드연구회 2007 제노사이드연구 Vol.2 No.-
Since the World War II many parts of the German society struggle to come to terms with its own past, but very slowly. The exhibition Vernichtungskrieg. Verbrechen der Wehrmacht 1941 bis 1944 was the very example which shows well the way in which the German society reacted against its own shameful past. Upon the end of the war in 1945, several prominent Wehrmacht generals made a statement that defended the actions against partisans, executions of hostages, and the use of slave laborers as necessary to war effort. The generals contended that the Holocaust was committed by the SS and its partner organizations, and that the Wehrmacht command had been unaware of these actions in the death camps. This statement said that the armed forces had fought honorably and left the impression that the Wehrmacht had not committed war crimes. Although a number of high Wehrmacht officers stood trial for war crimes, the ‘legend’ of the Wehrmacht did not easily perished. The road to come to terms with the past of Wehrmacht was really long and dark. Both German states needed to establish armed forces, and could not do so without trained soldiers and officers that had served in the Wehrmacht. Cold War priorities and taboos about revisiting the most unpleasant aspects of World War II meant that the Wehrmacht’s role in war crimes was not seriously re-examined until the late 1980s. The view of the ‘unblemished’ Wehrmacht was shaken by an exhibition produced by the Hamburg Institute for Social Research titled Wehrmachtausstellung. The popular and controversial traveling exhibition asserted that the Wehrmacht was involved in planning and implementing a war of annihilation against Jews, prisoners of war, and the civilian population. The exhibition of course provoked many criticisms. These led its committee to conclude that the exhibition be reopened in revised form. The exhibition and the debates related to it show well the twisted long-process to overcome the shameful past in German society. Nowadays the past of the Wehrmacht stands in the center of the Vergangenheitsbew ltigung in Germany.
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광센서 조광제어시스템에서의 광센서 최적 방향성과 위치에 관한 평가 연구
최안섭,정근영 대한건축학회 2003 대한건축학회논문집 Vol.19 No.10
The purpose of this simulation study was to improve the performance of daylight responsive dimming systems. This simulation study was to analyze the followings. ⅰ) correlation between workplane illuminance and photosensor signal ⅱ) comparison between closed loop proportional and open loop proportional control algorithms in the daylight responssive dimming system. This study used DayDim as a simulation software and four different spatial characteristics of photosensors. Each photosensor has different spatial distributions in the existing photosensor, 0 degree, 30 degree, and 60 degree from nadir. Parameters such as sky condition, seasonal changes, azimuth, photosensor location, and different spatial distribution were considered. The results showed proper photosensor position and spatial distrubution determined by the various parameters.
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최홍식,변근주 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1
This study is concerned with the optimum proportioning of R.C. sections for the optimum design of R.C. columns, using the Working Stress Design theory based on the AIK (the Architectural Institute of Korea) Code and the Ultimate Strength Design theory based on the ACI Code (318-77). In R.C. columns, since the strength and the steel ratio are usually considered at the preliminary stage, the design constraints used are strength constraints, and the side constraints(upper and lower limits of steel ratio). Cost objective function for the minimum cost design is obtained by considering the cost of concrete, steel bars, and forming. Section optimization of a column is achieved by using SUMT for the tension controls cases, and the heuristic method for the compression controls cases. It has been observed that the optimum proportioning of R.C. column results in significant saving in the construction cost, and that the minimum steel ratio of the Code, for the compression failure column, and the balanced steel ratio, for the tension failure columns, were the optimum solutions. The optimization algorithm developed may be recommended to achieve the minimum cost design of R.C. columns.
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최근준,왕창근 忠南大學校 環境問題硏究所 1999 環境硏究 Vol.17 No.-
Phosphorus in natural water and wastewater exists in supersaturated state due to low solubility, and it is difficult to form crystals and precipitates because precipitation rate in steps of nucleation, crystal growth, agglomeration and ripening is slow. Precipitation rate can be increased by seeding the crystals which has components and structure similar to the precipitates. This study is based on the precipitation mechanism and was performed to see phosphorus removal efficiency of various clamshells serving as surface precipitation media. The results obtained from this study are following ; From XRD analysis for various clamshells, major component of clamshell used as phosphorus removal material is found to be CaCO₃/aragonite. The batch tests with the clamshells showed excellent phosphorus removal efficiency up on 99% depending on the experimental condition. Phosphorus removal efficiency was dependent on temperature, detention time, pH and shell particle size, and appeared relatively high removal efficiency at high temperature, long detention time, low pH and small shell particle size. Phosphorus removal technology using clamshells has many advantages of reusing solid wastes, not producing sludge as well as not adding chemicals.
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崔洪植,邊根周,李相旻 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.2
A mathematical model is formulated for the minimum cost design of reinforced concrete earth structures. The design variables are selected to be the depth and steel ratio in the retaining wall, and the depth, steel ratio and footing sizes in the isolated column footings. An elastic analysis is performed and resulting designs are based on both the ultimate strength theory and the elastic theory of concrete design. Constraint requirements are imposed to insure structural strength and side constraints. The resulting mathematical model is a nonlinear constrained optimization problem. The modified Lagrange Multiplier method is suggested as a satisfactory algorithm for the optimum design of the R.C. earth structures.
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