• Journal of Korea Water Resources Association
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• v.50 no.2
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• pp.129-138
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• 2017

In this study, the hydraulic model test was performed for the 3 vertical inlets of the Shinwol rainwater storage & drainage system that Seoul City plans to install, and the control discharge value actually measured was analyzed comparing to the value obtained using the theoretical control discharge equation suggested by Yu and Lee (2009). In the results, it was 66~69% compared to the value obtained from theoretical equation showing that the control discharge value according to the theoretical equation is calculated excessively. The sensitivity analysis by design factor was performed using 3 models conducted in this study and 15 hydraulic experiment models conducted in existing research Yu and Lee (2009). The sensitivity analysis of control discharge equation was performed by dividing $Q_{cm}/Q_{cp}$ into 3 ranges. The suggested equation considered only the influence on the tangential intake structure design factor B, z, ${\beta}$, e/B, so ${\theta}$, L considered complex influence suggested equation needed to be more improved.

• Korean Journal of Culture and Social Issue
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• v.28 no.4
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• pp.555-575
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• 2022

Recently, dating violence has emerged as a serious social problem, but there is not enough research on controlling behavior among the subtypes of dating violence. Thise study explored the relationship between psychological entitlement and controlling behavior, and the mediation effect of social dominance orientation and social comparison orientation. Furthermore, the study examined if the mediation effect of social dominance orientation between psychological entitlement and controlling behavior differed by gender. As a result, the higher the level of psychological entitlement, the stronger the level of social dominance orientation, social comparison orientation, and the controlling behavior. In addition, the stronger the level of social dominance orientation and social comparison orientation, the more frequently was the occurance of the controlling behavior committed. The level of social dominance orientation mediated the relationship between psychological entitlement and controlling behavior. The level of ability comparison orientation mediated the relationship between psychological entitlement and controlling behavior. The mediation effect of social dominance orientation between psychological entitlement and controlling behavior was moderated by gender. In other words, the mediation effect of social dominance orientation between psychological entitlement and controlling behavior was significant for the male, but not for the female. The limitations of the study and suggestions for further research were discussed.

• Journal of Labour Economics
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• v.29 no.1
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• pp.99-127
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• 2006

This paper examines the effect of the market power of firms in the product market on job creation, job destruction and net job growth. It uses the reconstructed establishment data in the Korean Annual Mining and Manufacturing Survey between 1982 and 2002. This paper shows that job creation has continuously declined since the late 1980s and the decline is common for both market-dominant and competitive firms. The effect of market dominance on job creation is negative, controlling the firm-characteristics variables such as firm size and firm age.

• Journal of Energy Engineering
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• v.15 no.4 s.48
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• pp.256-276
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• 2006

Transmission congestion is one of the key factors to local market power in competitive electricity markets. Financial transmission rights provide the financia] protection to their holders by paying back the congestion rent. A variety researches have shown that the existing trading mechanisms on transmission right can exacerbate market power. This paper proposes an alternative methodology in mitigating the local market power using the Contingent Transmission Rights on the locational marginal pricing scheme. The proposed methodology was demonstrated with the Optimal Power Flow.

• Journal of agriculture & life science
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• v.44 no.6
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• pp.201-211
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• 2010

This paper estimates the degree of market power of marketers in the Korean beef market, especially focusing on wholesale and retail marketing levels. Prices in various marketing levels show that there is a possibility of more price differentials than marketing costs in the Korean beef market. Annual price and quantity data are used to estimate the degree of market power in the wholesale and retail levels. The empirical results show that the domestic beef retail market is far from perfect competition and the wholesale market is relatively near to perfect competition.

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.367-374
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• 2019

This study aims to examine the impact of corporate governance systems on the relationship between R&D investment and the performance of Chinese firms. The sample firms were obtained from the statistical yearbook of Chinese high-tech firms. We implement a multiple-regression analysis for an empirical examination. The findings of showed that the separation of the board chair with CEO strengthen the R&D investment-performance relationship of Chinese firms. However, the outsider ratio of the board was found to negatively moderate that relationship. This study provides practical guidelines for Chinese firms undertaking R&D management and corporate governance systems. It also encourages future study on the effects of corporate governance as the means for R&D investment management.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.851-858
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• 2002

본 연구는 주식시장에서 투자종목을 선택할 때에 주로 사용되고 있는 '평균-분산(Mean-Variance)접근방법'과는 달리, '확률적 지배(stochastic dominance)'의 개념을 적용하여 포트폴리오를 구성하는 방법을 연구하였다. 즉, 기준이 되는 확률분포 (KOSPI)를 1차 확률적으로 지배하는 포트폴리오를 구성하는 최적가중치를 체계적으로 탐색하는 방법을 모색하였다. 최적화 과정에서 고려해야 하는 함수의 모양과 볼록성 여부를 알아보았고, 일차도함수를 분석적으로 구해서 도함수기법을 이용하는 알고리즘을 개발하여 그 효율성을 시험해 보았다.

• Proceedings of the Korean Information Science Society Conference
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• 2010.06b
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• pp.493-496
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• 2010

본 논문은 평면 위의 점 집합에서 지배되지 않는 점 집합을 찾아내는 병렬 알고리즘을 제안한다. 우리는 먼저 기존의 지배되지 않는 점을 계산하는 문제가 SIMD형 병렬계산 장치인 GPU에서 병렬화가 가능하다는 사실을 보이고, 실제 GPU를 이용한 병렬 알고리즘을 설계 구현하였다. 또한 실험 결과 직렬 알고리즘에 비해 2배 이상의 성능 향상을 얻을 수 있었다.

• Korean Journal of Logic
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• v.9 no.1
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• pp.63-95
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• 2006

노직은 뉴컴의 문제를 뉴컴이 묘사한 상황에서 합리적인 행위를 선택함에 있어 지배의 원리와 기대 효용 극대화의 원리의 적용의 결과가 충돌한다는 것으로 설명하고 있다. 슐레징거와 이병욱은 지배의 원리에 의한 선택이 합당함을 논증하고 있다. 그들의 논증은 원래의 뉴컴 상황과 변형된 뉴컴 상황의 유비에 근거하고 있다. 이 글에서는 그러한 유비가 성립하지 않거나 성립할 경우 뉴컴 문제를 해결하는 데 흡족하지 않음을 보이려 하고 있다. 그리고 뉴컴 상황에서 지배의 원리를 사용해야 하는 독자적인 이유를 제시하고 있다.

• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 2003.09a
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• pp.213-220
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• 2003

고층의 강 모멘트저항골조에 대한 지진 반응을 살펴보기 위해서 동적해석을 실시하였다. 구조물은 세가지의 다른 설계절차로 의도적으로 설계하였고 그 세가지의 개념은 강도 지배설계, 강기둥-약보 지배설계, 횡변위 지배설계이다. 그렇게 설계한 구조물이 각각 질량비정형이 존재하도록 하여 힁변위, 소성힌지, 이력에너지 입력 및 요구응력에 대해서 토론하였다. 미래에 설계에의 응용을 위해서 최대 지반가속도로 표현한 두 등급의 지진 하중을 이용해서 이력에너지 입력요구 곡선을 제시하였다.