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      • Salicylic Acid 투여가 흰쥐에 일으킨 염증반응에 미치는 영향

        강상균,안재덕 중앙대학교 의과대학 의과학연구소 1977 中央醫大誌 Vol.2 No.1

        It has been suggested that aspirin like cortisone inhibits inflammatory reaction in rats. Lysosomal membrane stability is proposed as a mechanism of antiinflammatory reaction of aspirin. This experimental study was designed to observe the effect of aspirin on inflammatory reaction of the skin in the rat. Rats are divided into 3 groups, namely control, SA Ⅰ, and SA Ⅱ. In the control group, skin incision was made then sutured on the abdominal wall after clipping of hair under anesthesia. In the SA Ⅰ group, aspirin 150㎎/㎏ was given one day before wounding. In the SA Ⅱ group, aspirin 150㎎/㎏ of aspirin was given immediately after surgical procedure. Rats are sacrificed under the scheduled time table of 6, 12 hours, 1,2,3,4,5,6,10, and 14 days after wounding, then histo-pathologic studies were carried out on the wounded skin. Obtained results were as follows: 1. SA Ⅰ and SA Ⅱ group showed obviously reduced neutrophilic leukocyte infiltration and suppressed vascular reaction in the eary stage of inflammatory process. 2. Fibroblast proliferation as well as collagen fiber formation are delayed in the repair process in the group SA Ⅰ and SA Ⅱ. 3. Inflammatory reaction and repair proces are more suppressed in the SA Ⅱ group than SA Ⅰ group. 4. The above changes suggests that anti-inflammatory reaction of aspirin is due to suppression of cell infiltration in the early stage of inflammatory reaction.

      • KCI등재

        사회간접자본 민간투자사업의 핵심성공수행 요인분석에 관한 연구

        강상균,김연성,유석천,이규태 한국경영공학회 2008 한국경영공학회지 Vol.13 No.2

        The purpose of this study is to contribute to the development of infrastructure projects in Korea both theoretically and practically. Most importantly, critical success factors identified in this study could help private sectors succeed in carrying out infrastructure projects. The main methodology used for carrying out this study is the DHP method which is a comprehensive way of using both the Delphi technique and the AHP technique. The Delphi technique extracts critical success factors and subsequent implementation guidelines for infrastructure projects. The AHP technique was used to weigh identified factors and analyze their differences. This study will also provide private enterprises with a road map for proceeding with their projects and improving project performances. By sharing critical success factors with government authorities, infrastructure development policies and regimes could better reflect those success factors. Lastly, the study methodologies and results will serve as a theoretical base to infrastructure studies in the future. The purpose of this study is to contribute to the development of infrastructure projects in Korea both theoretically and practically. Most importantly, critical success factors identified in this study could help private sectors succeed in carrying out infrastructure projects. The main methodology used for carrying out this study is the DHP method which is a comprehensive way of using both the Delphi technique and the AHP technique. The Delphi technique extracts critical success factors and subsequent implementation guidelines for infrastructure projects. The AHP technique was used to weigh identified factors and analyze their differences. This study will also provide private enterprises with a road map for proceeding with their projects and improving project performances. By sharing critical success factors with government authorities, infrastructure development policies and regimes could better reflect those success factors. Lastly, the study methodologies and results will serve as a theoretical base to infrastructure studies in the future.

      • KCI등재

        조상설비 조합에 따른 정태적 특성 및 동태적 특성 비교

        강상균,장길수,이병준,권세혁 대한전기학회 2005 전기학회논문지A Vol.54 No.4

        - Various compensators are installed into the power system to operate the system economically and stably by maximizing the availability of utilities and power transmission capability. Fixed Capacitor(FC), Mechanical Switched Capacitor(MSC), and FACTS(Flexible AC Transmission Systems) are used to regulate voltage and power flow of the system. When a disturbance occurs in the power system, the Fixed Capacitor operates dependently on the voltage of the power system and cannot change the amount of installation automatically. But compared to other equipment, the Fixed Capacitor is more economical due to its low cost. Since MSC can change the amount of installation according to the state of the power system, operates more effectively than the Fixed Capacitor. FACTS have fast dynamic performance for the transient condition, but the cost is high. Therefore, it is needed to develop an optimized installation planning for the reactive power compensators by considering their dynamic performance and cost. In this paper, an optimized compensator combination and the proposed scheme is proposed and it is applied to KEPCO system in order to show its capabilities.

      • KCI등재

        L2 Syntax-Discourse Interface: Wh-Parameter and D-Linking

        강상균 서울대학교 언어교육원 2014 語學硏究 Vol.50 No.2

        In English, the Superiority Condition (Chomsky 1973) is overtly observed;in multiple wh-questions, the wh-phrase that is closest to SpecCPgets moved. But this condition is overridden by discourse-linking whichphrases(Pesetsky 1987) ; i.e., any one of the which-phrases can move toSpecCP. However, these phenomena are overt only in a wh-movementlanguage such as English, but not in wh-in-situ languages such asKorean. For Koreans to learn the syntactic contrast in English, resettingthe wh-parameter is crucial. By examining L2 acquisition of superiorityand discourse-linking, this study tests the Interpretability Hypothesis andthe Interface Hypothesis. 51 Korean ESL learners and 18 native Englishspeakers participated. The results suggest the learners’ parameter resettingregardless of the uninterpretability of the target feature.

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