능동필터 제어시스템을 위한 검출노이즈 저감방법에 관한 연구

최규하,채영민,황종규 건국대학교 산업기술연구원 1996 건국기술연구논문지 Vol.21 No.-

Active Power Filters(APF) have been developed for several years to solve the harmonics disturbance problems on power system networks. Control scheme of the proposed system is the Voltage Regulated Current Source Power Filter(VR-CSPF) that has a function to control the voltage of inverter output capacitor. Differential term is necessary to calculate voltage drop in VR-CSPF system. Since inverter switching action has occurred inherently in APF both switching or outside white nosis affect seriously at control signal. If control signal with added noise is differentiated, then high frequency noise becomes amplified more and more. Thus high frequency noise reduction method is needed for accurate operation. Hence this paper describes reduction method about amplified differential noise problems and its antinoise performances at VR-CSPF control system are studied by simulation and experiment

사염화탄소 투여로 인한 간세포 상해와 간내 미세혈관계의 변화에 대한 주사전자현미경적 관찰

채종민 啓明大學校 醫科大學 1986 계명의대학술지 Vol.5 No.2

Intracellular structures of hepatocytes and the hepatic imcrocirculation were studied in rats intoxicated with carbon tetrachloride by scanning electron microscopy. Liver tissues were treated by the DMSO cracking method and aldehyde-prefix somium-DMSO-osmium method. A rapid, easy and reproducible method to prepare plastic corrosion casts of the hepatic microcirculation employed Mercox CL-2B. The hepatocytes around the portal tracts showed minimal abnormalities. However, swollen foamy hepatocytes in intermediate zone and central zone had numerous vesicles and vacuoles, which correspond to dilated cisternae of rough endoplasmic reticula (RER) and fat droplest observed by transmission electron microscopy and aldehyde-prefix O-D-O method. And also, disorder of intrahepatic microcirculation was observed to be irregular-shaped sinusoids and distended space of Disse in acute hepatic injury. This abnormal microcirculatioin was well demonstrated three-dimensionally by scanning electron microscopy of corrosion casts.

상황변수들과 회계정보시스템의 정보특성들간의 관계에 대한 영향요인들

최종민 한국경영과학회 1991 經營 科學 Vol.8 No.1

In this study, it was empirically proved that there is significant congruence relationships between the information characteristics of Accounting Information Systims and the contextual variables of organizational structure, task characteristics, It was also supported that influence factors, such as user participation, top management support, capability of information system personnel and the existence of steering committee have an effect on the relationships.

정보시스템 성과의 決定要素

崔鍾珉 慶北大學校 經商大學 經濟學科 1986 慶商大學論集 Vol.14 No.-

Computer based information system have been increasingly important to contemporaty organizations. So, high performance information systems can do much to promulgate organizational success. This study focuses on two objects. It suggests a wrong of Mansour & Watson's(1980), and it implements the development of independent model which explains the effects of influence variables on the system performance. Mansour & Watson's(1980) article focuses on the findings of a large, cross-organizational study. Investigated was the impact that computer hardwase & software and behavioral, structural, and environmental variables have on information system performance. The problems of Mansour & Watson's(1980) are as follows, first, environmental variable has an indirect effect on the system performance, second, it must be considered that there is a definite relationship between organizational context variables and EDP departmental structure variables, third, there are some errors in selecting items measuring behavioral variables, fourth, computer hardware & software variables must be included in the EDP departmental structure variables, ◁(그림 삽입)▷ 원문을 참조하세요 fifth, there are some mistakes in measuring information system performance. My study implements the development of independent model considering like this problems. Mansour & Watson's model and my model are suggested as follows.

情報價値의 決定要素

崔鍾珉 慶北大學校 經商大學 經濟學科 1985 慶商大學論集 Vol.13 No.-

The purpose of this study is to provide a framework for determining the value of change in the information system through the inventory decision model. For this study, existing articles are widely collected & minutely arranged. In chapter 1, single period information evaluation model is developed from the point of view of the information evaluator and the conceptual framework of multi-period evaluation model is suggested. In chapter 2, the attributes of information such as timeliness, relevance & accuracy are illustrated, and the effects of these attributes on the value of a change in the information are studied respectively. Chapter 3 briefly examines some factors which should be taken into consideration in any evaluation model, these factors are divided into two groups; ⅰ) interactions of information changes and ⅱ) problems in information evaluation. The future study suggestion is set fourth in the final chapter. This study has attempted to develop a theoretical and conceptual framework, in addition, this study may serve as a basis for additional theoretical analysis of the impact of information system alternatives on specific decision models. A simple inventory model has been used to illustrate some notions discussed in the study. The analysis of that inventory model has also provided additional insight into the nature of information system alternatives.

會計情報시스템을 이용한 事務生産性 提高방안

최종민 한국경영과학회 1993 經營 科學 Vol.10 No.2

Based upon previous research, factors affecting office productivity with the Accounting Information Systems(AIS) were suggested, and the relationships between the factors and the office productivity with the AIS were hypothesized. The empirical results suggested that there are significant positive relationships between the factors such as the user participation, level of AIS utilization, internal AIS development and AIS technical sophistication and the office productivity with the AIS. According to the results, the office productivity increasing strategy with the AIS were proposed.

첨단 생산기술 도입에 따른 관리회계정보시스템의 변화 : 국가 문화적 차이의 영향

최종민 한국경영과학회 2003 韓國經營科學會誌 Vol.28 No.4

This study empirically examined the impact of national culture on the amount of information provided by management accounting information systems (MAIS). Two very different cultures, the Korean and Australian cultures, were considered in our study. The results showed that the much more flexibility performance information is provided in Korean firms, while the amount of quality performance information and traditional cost control information (TCCI) produced in Australian firms is much more than in Korean firms. However, it was found that in the amount of financial performance information and advanced cost control information (ACCI), there exist no significant differences between Korean firms and Australian firms. We also investigated the effect of the three-way interactions among national culture, level of advanced manufacturing technology (AMT), and information on production performance. The results of this study revealed a significant impact of three-way interactions on the improvement of production performance. In conclusion, we suggest that under high levels of AMT, Korean firms need a large amount of information-based MAIS, while Australian firms require the ACCI and nonfinancial performance information-oriented MAIS.

개인의 사무생산성 증대를 위한 회계정보시스템 설계방안

최종민 한국경영과학회 1997 經營 科學 Vol.14 No.2

This paper represents an exploratory effort to test empirically the contingent relationships between the contextual variables, such as user task characteristics and personality, and the information characteristics of Accounting Information Systems (AIS), and to prove the effects of influence factors on the increase of personal office productivity. In this study, it was suggested that personal office productivity is influenced by the fit between the contextual variables and the information dimensions of AIS. It was also proved that influence factors have a positive effect on the increase of personal office productivity.

암세포의 증식과정에서 20 kDa 단백질의 arginine 메칠화 반응에 관한 연구

최석민,류총근,한종설,박길홍 고려대학교 의과대학 2000 고려대 의대 잡지 Vol.36 No.1

Enzymatic methylation of endogenous protein (s) by protein arginine N-methyl- transferase(EC. 2.1.1.23) in several cancer cell lines was investigated in an attempt to understand possible regulatory role of the modification in relation to cellular proliferation. When several cancer cells (HeLa, HCT-48, A549, HepG2) were incubated with S-adenosyl-L-〔rnethyl-³H〕methionine, the endogenous 20- kDa species in the extracts were most intensely 〔methyl-³H 〕-labeled compared to that in normal colon tissues. Whether the 〔methyl-³H 〕-labeld 20-kDa is due to carboxyl-O-methylation, the alkali-lability of the purified and methylated 20- kDa species were examined at pH 9-11, at 37℃ for 60 min. The results indicated that 〔methyl-³H 〕-label on the 20-kDa species of HCT-48 cells did not decrease after alkali treatment quantified by Fuji BAS 2500 Bio-Image analyzer. The methylation of 20-kDa did not increase in the presence of 4 mM GTPγS, further indicating the methylation is not due to C-terminal farnesylated cysteine carboxyl methylation. Also, none of purified histones showed the same mobility on SDS-PAGE as the 20-kDa endogenoiis substrate. In conclusion, in the present study, a new novel endogenous 20-kDa methyl accepting protein for protein arginine methyltransferase was found which is closely correlated with cell proliferation suggesting a possible role of this post-translational modification during cellular proliferation.

철근콘크리트 프레임면내 조적벽체의 내진성능 개선 기술 개발

申鍾學,河基柱,崔民權 慶一大學校 2002 論文集 Vol.18 No.-

Experimental programs were accomplished to improve and evaluate the structural performance of test specimens, such as the hysteretic behavior, the maximum horizontal strength, crack propagation, and ductility etc. Test variables are restraining factors of frame, with or without masonry infilled wall, and masonry method. Six reinforced concrete rigid frame and masonry infilled wall were tesed and constructed in one-third scale size under vertical and cyclic loads simultaneously. For masonry infilled wall with restraining factors of frame, maximum horizontal capacities were increased by 1.26∼2.24 times in comparision with that of rigid frame. For masonry infilled wall with restraining factors of frame(IFWB-1), cumulated energy dissipation capacities wear increased by 1.60 times in comparision with that of masonry infilled wall(IFB-1) at final stage of testing.