石灰石 添加에 따른 二酸化黃 除去率 向上

김영수,박진식,장성호,장부규,서정민,김장호 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

This study was carried out to investigate the performance enhancement of forced oxidation operation on the limestone utilization and SO₂ removal efficiency of the pilot flue gas desulfurization system. The results are as follows : 1. The results of the forced oxidation tests have shown that converting from natural to forced oxidation operation can have a significant effect on both limestone utilization and SO₂ removal efficiency of an FGD system. Conversely, if the limestone utilization is maintained at a constant level, the SO₂ removal efficiency will increase. Conversely, if the pH is held constant, the limestone utilization will increase significantly. 2. This characteristic of a forced oxidation system can translate into lower L/G requirements and, therefore, reduced capital and operating costs for slurry recycle pumps. 3. Forced oxidation operation will provide improved limestone utilization and, therefore. reduced limestone reagent costs.

생활폐기물 처리에 관한 시민 의식조사에 대한 연구 : Food Waste 음식물 쓰레기를 중심으로

장성호,배계선 東亞大學校生命資源科學大學附設 農業資源硏究所 1998 農業生命資援硏究 Vol.7 No.1

A questionary survey was conducted to investigate citizen's attitude to the treatment of food wastes in Miryang city. In this study, collection efficiencies was 87.8%, as 281 individuals among 320 individuals. After volume-base charge system, 86.8% of answers perform source separation and 60.9% of respondents separate everything of recycle goods. The majority of respondents discharge food waste using standard envelope. The biggest problems for deposition of the food wastes are offensive odor and worm for reasons of sanitation. Almost citizens think that the period of deposition suit from two days to three days. More than 90.0% of the citizens recognize that compost product made from food wastes and recognition of the people for the composting and composting facilities was affirmative. Majority of the respondents thought that the administration and the provincial government need activity publicity for the source separation fixation of the food wastes.

A/D 변환기를 이용한 신호처리

장성환,유인호 圓光大學校 1992 論文集 Vol.26 No.2

This paper is concerned with measuring of rotation movement signals using micro computer with A/D convertor. The system was consisted of the coil pairs using the electromagnetic method, micro computer, A/D convertor and the data was processed by using the micro computer. Signals of rotation movement were converted to digital data by the A/D converter of the successive approximated type in order to provide the flexibility of the data processing. The A/D converter was controlled by the micro computer and the converted datas was stored on the floppy disk and data was processed to get the velocity and acceleration of the rotation movement. The central difference algorithm was the fittest to process the rotation movement signals and we developed the programs on the basis of the algorithm. Through the data processing, these programs were well done and the numerical values of the velocity and acceleration of the rotation movements were got easily.

유온감압탈수처리한 슬러지의 재이용 가능성에 관한 연구

장성호,김수생 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.2

This study was to experiment, through sewage sludge treatment by Vacuum Frying Method, the sludge composition change before and after treatment, the thermal specific character, and the effects of treatment condition come up to sludge water content. The results are as follows. 1. The contents of crude protein and crude fat were respectively 4.8% and 3.4% before treatment, and those were 18.9% and 12.5% after theatment. 2. According to the results of Thermogravimetric analysis, the temperature ranges of themal decomposition were 290-430℃ and 250-380℃ before and after treatment. According to the results of Derivative Thermogravimetric analysis, the temperature of rapidly mass decreas occur respectively 320℃ and 280 C. For the more proper treatment and reuse of organic wastes, the continuous studies of Vacuum Frying Method are more needed.

정치기제로서 북한의 주체사상이 체제에 미친 영향

장성호 상명대학교 사회과학연구소 2002 社會科學硏究 Vol.15 No.-

The serious economic crisis North Korea has recently undergone exists as the ground for expectation of changes to the North Korean politico-economic development strategy, but the North Korean reality is that North Korea has taken partial action to resolve the imminent economic difficulty rather than fundamental changes. It is because the breadth and extent of policy choice in North Korean is constrained in advance as the Chuche(identity) ideology in North Korean society defines and cements as the principle of its regime the chieftain system in political terms and the autonomous national economic line in economic terms. The change of the development strategy can not but be constrained further because the Chuche ideology constraining the development strategy is the fundamental element supporting North Korean society and simultaneously is positioned as the principle directly closely to survival, the maintenance of the regime. That is, the Chuche(identity) ideology is the contradictory political mechanism of the North Korean society. The Chuche(identity) ideology was shaped in interaction with the process of defining the regime in the formative period of the North Korean regime. But it was turned into pure ideology of North Korea as it was systematized and came to have the power of defining the regime in an unilateral way. It served the function of rationalizing the chieftain system in political terms and the autonomous national economic line in economic terms in the process of their establishment. Based on this discussion, this study attempted to define the chieftain system as the political characteristic of North Korean and the autonomous national economic line as its economic characteristic. It focused this discussion on the constraint of the Chuche(identity) ideology as the reason for difficulty with the change of the North Korean politico-economic development strategy. As a result, the following findings were as follows: The North Korean ruling ideology of the Chueche ideology has performed a functional role in maintaining the North Korean regime, whereas it played a dysfunctional role in pursuing economic development. As a consequence, it enabled Kim Jung-il to succeed to Kim Il-sung's power in political terms and led the economic crisis such as food shortage, energy shortage and raw material shortage. To overcome the economic crisis arising from the failure of the economic development strategy, North Korea needs to modify the existing development strategy. But the economic development strategy is confronted with limitations due to the constraint of the Chuche(identity) ideology and the inefficiency of the chieftain system. The Chuche(identity) ideology and the chieftain system all are the principle of the regime that Kim Junh-il can give up. The North Korean politico-economic development strategy is becoming a dilemma in pursuing the Chuche(identity) ideology and the chieftain system with economic development. Accordingly, emphasis in put on the Chuche(identity) ideology and the autonomous national economic line and the chieftain system are lasting.

韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

편심 압축력을 받는 스테인리스 원형강관 기둥의 곡률형상에 따른 좌굴내력에 관한 실험적 연구

장호주,서성연,양영성 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.3

This study is a series of experimental investigation on the buckling strengths of eccentrically compressed cold formed stainless steel CHS(circular hollow section) columns. The principal parameters in this study are slenderness ratios( λ=30, 50, 70) and magnitude of eccentricity e(0, 2.5, 5.0, 7.5, 10㎝) on the direction of end moment. The direction of end-moment means 3 different bending moment distributions. Objectives this study are to obtain the maximum loads and moments by performing an experimental work and to compare the experimental behaviors with the design standard curves, AIK-LSD and AISC-LRFD, AIJ-LSD, SIJ-ASD curves. The ultimate buckling strengths and bending moments of circular section members are evaluated by a method in accordance with design standard curves. Therefore this paper attempts design standard for the use of these stainless steel columns as structural compression members. The numerically obtained ultimate buckling strengths and bending moments design standard curves of beam columns show a reasonably good agreement with the available experimental results.

유온감압법에 의한 슬러지의 탈수에 관한 연구

장성호,박진식,성낙창,김수생 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

This study was to experiment, through sewage sludge treatment by Vacuum Frying Method, the effects of reaction condition come up to sludge water content. The results are as follows 1) On accassion the sewage sludge treatment by Vacuum Frying Method, the effect of pressure come up to water content, the water content decreased when the same reaction temperature and time was lower pressure more than the normal pressure(760㎜Hg), particularly. Since pressure 280㎜Hg increased water content decrease range. Since pressure(250㎜Hg) the water boiling point down sharply a phenomenon and the lower pressure lowered the water boiling point a phenomenon, the same sewage sludge water content evaporated rapidly the lower pressure more than the normal pressure. Accordingly, a close vacuum(40㎜Hg), showed very lower water content when a short reaction temperature and reaction time. 2) On accassion the sewage sludge treatment by vacuum Frying Method, the effect of reaction time come u to sludge water content, at the same reaction pressure and temperature, relatively the water content at a low reaction temperature(90℃, 120℃) decreased small in case of a long reaction time, the water content at a high reaction temperature(150℃, 180℃) decreased rapidly in case of a short reaction time. 3) On accassion the sewage sludge treatment by Vacuum Frying Method, the effect of come up to sludge water content, at the same reaction time and pressure, increase of reaction temperature decreased rapidly the water content.

축력과 양단 대칭모멘트를 받는 스테인리스 각형강관 기둥의 좌굴내력에 관한 실험적 연구

장호주,서성연,양영성 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.2

This study is a series of experimental investigation on the buckling strengths of eccentrically compressed cold-formed stainless steel square hollow section columns. The principal parameters in this study are slenderness ratios(λ=30, 50, 70) and magnitude of eccentricity e(0, 2.5, 5.0, 7.5, 10cm) on the symmetrical end-moment. Objectives of this paper are to obtain the maximum loads by performing an experimental work and to compare the experimental behaviors with analytical results. The ultimate buckling strength of square section members are evaluated by a numerical method in accordance with the bending moment-axial force(M-P) interaction curves. The behavior of each specimen is displayed in the form of moment-angle(M-θ) relationship. The numerically obtained ultimate buckling interaction curves of beam-columns showed a reasonably good agreement with the available experimental results.

편심 압축력을 받는 스테인리스 각형강관 기둥의 곡률형상에 따른 좌굴내력에 관한 실험적 연구

장호주,서성연,양영성 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.2

This study is a series of experimental investigation on the buckling strengths of eccentrically compressed cold-formed stainless steel square hollow section columns. The principal parameters in this study are slenderness ratios(λ=30, 50, 70) and magnitude of eccentricity e(0, 2.5, 5.0, 7.5. 10cm) on the direction of end-moment. The direction of end-moment means 3 different bending moment distributions. Objectives of this paper are to obtain the maximum loads and moments by performing an experimental work and to compare the experimental behaviors with the design standard curves, AIK-LSD and AISC-LRFD, AIJ-LSD, SIJ-ASD curves. The ultimate buckling strengths and bending moments of square section members were evaluated by a method in accordance with design standard curves. Therefore this paper attempts design standard for the use of these stainless steel columns as structural compression members. The numerically obtained ultimate buckling strengths and bending moments design standard curves of beam-columns showed a reasonably good agreement with the available experimental results.