• 품질경영학회지
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• 제47권3호
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• pp.553-569
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• 2019

Purpose: The purpose of this study is to identify the impact of conflicts and cooperation on project performance in the nuclear power plant construction project, thus contributing to the successful performance of project participants and the achievement of project objectives. Methods: This study used a method of conducting a survey of participants in the nuclear power plant construction project and verifying the hypothesis statistically. Results: The results of this study are as follows; First, role conflicts and relationship conflicts have negative effects on collaboration. Second, role conflicts have a negative effects on project performance, but conflict in relation has no significant effects on project performance. Third, collaboration has a positive effects on project performance. Finally, the communication quality in the relationship between conflict and collaboration has been shown to have a Moderated effect. Conclusion: In order to achieve the goal in the nuclear power plant construction project, the level of collaboration should be improved based on conflict management among project participants.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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• pp.803-807
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• 2001

This paper presents a new control scheme for a DVR (Dynamic Voltage Restorer) system consisting of series voltage source PWM converters. To control the negative sequence components of the source, it is necessary to detect the negative sequence components. Generally, a filtering process is used which has some undesirable effects. This paper suggests a new method for separating positive and negative sequences components. This control system is designed using differential controllers and digital filters. The positive and negative sequences are extracted and controlled individually. The performance of the presented controller and scheme are confirmed through simulation and actual experiment with a 2.5kVA prototype DVR system.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 춘계종합학술대회
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• pp.424-428
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• 2003

고주파 여기 방식의 슬랩 도파관 $CO_2$ 레이저를 제작하고 성능을 평가하였다. 실험에 사용된 공진기의 구조는 concave mirror 두 개로 이루어진 negative branch와 concave와 convex mirror로 이루어진 positive branch로서 불안정 공진기의 구조를 이루고 있다. 도파관의 크기는 40$\times$2$\times$400mm이며, 123MHz의 입력 주파수를 사용하였다. 혼합가스의 비율은 $CO_2$:$N_2$:He=1:1:3이다. 압력은 10에서 60 torr, RF 입력 파워는 100에서 900W까지 증가시키면서 출력을 측정하였다 실험 결과 압력이 40 torr, RF 입력파워가 900W일 경우, negative 공진기와 positive branch의 최대파워는 각각 50.7 W와 71.8 W, 효율은 6.5 %와 9.2%이다.

• 한국콘텐츠학회논문지
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• 제21권4호
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• pp.262-277
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• 2021

권력의 과정을 알아보기 위해 부부권력(전통권력, 평등권력, 개인권력), 영향력전략(보상, 강요, 감정전략), 부정적 갈등해결방식(공격과 회피)의 관계를 이론적 모형으로 설정하였고 남성과 여성의 모형을 비교하였다. 지방에 거주하는 남성 182명과 여성 196명의 자료를 구조방정식모형 검증 방식으로 분석하였다. 분석결과, 첫째, 남녀모델에서 3개의 공통경로가 발견되었다. 감정전략이 증가할수록 공격과 회피가 증가하였다. 그리고 평등권력이 증가할수록 보상이 증가하였다. 둘째, 남녀 모두 평등권력이 강요에 영향을 미치지만, 그 영향은 상반되는 것으로 나타났다. 즉, 남성의 평등권력은 강요를 감소시키나, 여성의 평등권력은 강요를 증가시키는 것으로 나타났다. 셋째, 남녀모형에서 많은 차이점이 발견되었다. 결과를 토대로 이론적 함의와 부정적 갈등해결방식의 사용을 감소시키는 방안을 제시하였다.

• 한국유통학회지:유통연구
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• 제1권1호
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• pp.109-127
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• 1996

The purpose of this study was to represent hypotheses of the interrelationship of the level of cooperation, conflict, and performance and to report the findings testing the hypotheses in car channels. This study provides some general guidance toward better cooperation, conflict, and performance management. The results indicate that noncoercive bases of power and dependence hale a positive effect on cooperation, while the proposed inverse relationship between coercive bases of power and cooperation is not statistically significant. Coercive bases of power have a positive effect on conflict, while conflict is not statistically significant for noncoercive bases of power, dependence, and cooperation. Finally, cooperation has a positive effect on dealer performance, but conflict has a negative effect on dealer performance.

• 디자인학연구
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• 제17권4호
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• pp.233-240
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• 2004

과학기술이 발달한 현대에 살고 있는 우리는 모두 ‘에너지’로 인해 편리한 생활을 영위하고 있다. 우리나라는 자원빈국으로 에너지원의 대부분을 해외에서 수입하고 있는 실정이며 계속되는 경제 성장과 국민 생활수준의 향상으로 에너지 소비는 더욱 증가하는 추세이다. 원자력은 우리나라처럼 에너지 부존자원이 빈약하고 에너지 수입 의존도가 높은 나라에서는 필수적인 에너지 자립형 대체에너지라고 한다. 하지만 원자력 발전이 위험 시설이라는 부정적인 인식과 방사능 처리 시설에 대한 불신 문제가 이슈화되면서 원자력 발전에 대한 대국민 교육, 홍보가 절실히 요구되고 있다. 이러한 문제를 환경 색채계획의 관점인 친인간, 친환경 색채계획을 목표로 접근하였으며 이를 통해 원자력에 대한 부정적 이미지를 최소화하고 친근하고 자연스러운 이미지를 부각시키며 대 국민 신뢰성 향상 및 청정 이미지 구축이 본 연구의 목표이다. 이를 위하여 일본의 원자력 발전소와 국내 발전소의 사례를 조사, 분석하고 발전소가 건설될 대상지를 방문하여 자연환경, 현황분석을 통하여 구체적인 색을 추출하였으며 지역 주민의 참여를 유도하고자 선물조사를 실시하여 색채계획에 반영하였다. 원자력 발전소의 환경 친화적 이미지구현을 통해 발전소의 안정성 및 친근한 발전소 이미지를 구축하며 원자력 발전에 대한 일반 국민들의 부정적인 인식을 계도하는데 적극적인 홍보 전략 및 수단으로 외관 환경색채계획을 시도하며 이를 통해 원전의 새로운 이미지 창출에 기여할 것으로 기대된다.

• 한국환경교육학회지:환경교육
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• 제18권1호
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• pp.120-133
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• 2005

This study investigated the changes of consciousness and ambivalent attitudes about the important environmental issues among the teachers who enrolled the environmental education training. Experimental and control groups were composed with 47 and 30 person, respectively. Environmental issues were constructions of sea-wall, nuclear power plant and dam. Cronbach alpha of the self-developed questionnaire was $0.6909{\sim}0.8992$. Score were made with 5 Likert scales for consciousness, and with semantic differential half scale for ambivalent attitudes. Almost teachers(94.0% and 97.1%) have above 10 years teaching career. Strangers in environmental program were 53.2%. After environmental training, teachers' consciousness was significantly changed to negative about the construction of sea-wall for the farm field and industry complex area(p=0.019), and about the construction of dam for disaster like flood(p=0.026), and for adverse effects of citizen by fog(p=0.042). They were also significantly changed to negative about the construction of nuclear power plant for economical energy(p=0.004)', no-emission of greenhouse gases(p=0.033)', 'alternative energy(p=0.000)', 'destruction of ecology(p=0.052)' and 'social fear(p=0.009)'. The consciousness of teachers who have the experience of environmental training, were significantly changed to negative about the construction of nuclear power plant. Scores of teachers' ambivalent attitudes were made lower in experimental than control group about the construction of sea-wall and nuclear power plant. After education training, they were made lower so much as -10.0% in control, but higher much as +4.4% in experimental, and severely higher much as 86.5% in teachers who had experienced the environmental training about construction of sea-wall. Their scores were made lower so much as -3.3% in control, but much as -6.4% in control.

• Smart Structures and Systems
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• 제23권6호
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• pp.627-639
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• 2019

Passive control may not provide enough damping for a stay cable since the control devices are often restricted to a low location level. In order to enhance control performance of conventional passive dampers, a new type of damper integrated with a rotary electromagnetic damper providing variable damping force and a flywheel serving as an inertial mass, called the rotary electromagnetic inertial mass damper (REIMD), is presented for suppressing the cable vibrations in this paper. The mechanical model of the REIMD is theoretically derived according to generation mechanisms of the damping force and the inertial force, and further validated by performance tests. General dynamic characteristics of an idealized taut cable with a REIMD installed close to the cable end are theoretically investigated, and parametric analysis are then conducted to investigate the effects of inertial mass and damping coefficient on vibration control performance. Finally, vibration control tests on a scaled cable model with a REIMD are performed to further verify mitigation performance through the first two modal additional damping ratios of the cable. Both the theoretical and experimental results show that control performance of the cable with the REIMD are much better than those of conventional passive viscous dampers, which mainly attributes to the increment of the damper displacement due to the inertial mass induced negative stiffness effects of the REIMD. Moreover, it is concluded that both inertial mass and damping coefficient of an optimum REIMD will decrease with the increase of the mode order of the cable, and oversize inertial mass may lead to negative effect on the control performance.

• 한국연소학회지
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• 제18권3호
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• pp.44-53
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• 2013

In this study, the economic evaluation for imported coals was conducted for power plant based on thermo-dynamical performance analysis. The number of coal types considered was 1,755 imported by five power generation companies in Korea during the 2010-2012. The higher heating value (HHV) of the coals ranged 4,000-6,500 kcal/kg, mostly sub-bituminous. The 1D thermo-dynamical performance modeling was performed for a 500 MWe standard power plant using PROATES code. It was founded that the low rank coals had negative effects on the plant efficiency mainly due to the increased heat loss by moisture, hydrogen and flue gas. Based on the performance analysis, the economic performance of the coals was evaluated. The apparent price of low-rank coals tended to be significantly lower than design coal; for example, the unit price of coal with a HHV of 4,000 kcal/kg was 57% of the reference coal having 6,080 kcal/kg. Considering the negative effects leading to a decrease in the thermal performance, heating value compensation, and increased parasite load, the corrected unit cost for the coal with 4,000 kcal/kg was 90.7% of the reference coal. Overall, the cost saving by imported coals was not high as expected.

• 품질경영학회지
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• 제50권1호
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• pp.63-76
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• 2022

Purpose: The purpose of this study is to analyze the effects of risk perception and opportunistic behavior on project performance and the moderating effect of cooperation in this relationship through literature review to identify factors affecting the performance of large-scale nuclear power plant construction projects. Methods: This study conducted a survey on nuclear power plant construction project participants and verified the hypothesis using statistical methods. Results: The results of this study are as follows; First, risk perception appeared to have a positive effect on opportunistic behavior, and it was confirmed that opportunistic behavior among participating companies could occur even in nuclear power plant construction projects. Second, it has been proven that risk perception has a negative effect on project performance as suggested in previous studies. Third, in the relationship between opportunistic behavior and project performance, it was found that opportunistic behavior had a negative effect on project performance. Finally, cooperation was found to have a moderating effect on the relationship between performance risk and project performance. Conclusion: This study is a case of empirical analysis targeting nuclear power plant construction project workers, and provided a basis for reference in future related academic research and project implementation.