• Korean Educational Research Journal
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• v.42 no.1
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• pp.73-97
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• 2021

This study examines how kindergarten teachers' empathy and efficacy in enlisting parental involvement predict perceived parent-teacher relationships and teacher burnout. It also investigates whether teacher efficacy in enlisting parental involvement moderates the relationship between kindergarten teachers' empathy, perceived parent-teacher relationships, and teacher burnout. A total of 208 public and private kindergarten teachers employed in the Chungbuk area participated in a survey, and the data were analyzed using JAMOVI (version 1.6.23). There were three major findings. First, both kindergarten teachers' empathy and efficacy in enlisting parental involvement positively predicted perceived parent-teacher relationships. Second, there was a significant interaction effect between teacher empathy and teacher efficacy in enlisting parental involvement on perceived parent-teacher relationships. Specifically, when teacher efficacy in enlisting parental involvement was high (M+1SD), teacher empathy significantly positively predicted parent-teacher relationships. By contrast, when teacher efficacy in enlisting parental involvement was average or low (M-1SD), the effect of teacher empathy on the perceived parent-teacher relationships was not significant. Third, both kindergarten teachers' empathy and teacher efficacy in enlisting parental involvement negatively predicted teacher burnout, but there was no significant interaction effect between teacher empathy and teacher efficacy in enlisting parental involvement on teacher burnout. This study identified the role of teacher efficacy in enlisting parental involvement within the context of kindergarten teacher-parent relationships and teacher burnout. It confirmed that the effect of teacher empathy on parent-teacher relationships is moderated by the level of teacher efficacy in enlisting parental involvement.

• Journal of Korean Society of Transportation
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• v.28 no.6
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• pp.167-177
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• 2010

This study proposes a methodology for assessing the improvement of network connectivity of transport hubs. Extending a previously developed model that measures the connectivity of a node in transportation networks, we define two quantities called the supplied connectivity and the experienced connectivity. Using these quantities, we provide a systematic procedure for analyzing the network connectivity of a transport hub and also suggest criteria for determining whether a given project is effective in improving the network connectivity of the transport hub. The application of the methodology to a test site produces reasonable results, and as such it is expected that the methodology can be used for various transport hubs in the national road network. Once enough data from the application of the methodology are accumulated, a further study on the level of service in terms of network connectivity needs to be followed.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.2059-2063
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• 2007

장기 수자원계획시 댐군의 연계운영을 위한 물수지분석 모형으로 HEC-5 모형과 K-ModSim 모형을 선정하고, 이에 대한 댐군의 연계운영 효과를 비교 평가를 수행하였다. K-ModSim 모형은 범용 우선순위 목적 선형최적화 모형으로, 조절점 및 저수지조작에 대한 우선순위를 지정할 수 있는 반면, HEC-5 모형은 목적별 저수지 조작의 우선순위가 지정되며, 등가저수지 개념을 사용하여 방류 우선순위를 결정하도록 되어있다. 이와 같은 연계운영 방식의 차이는 적정한 시기에 조절점에서의 물부족이 발생하는지 여부를 결정짓는 매우 중요한 요소이다. 따라서 본 연구에서는 가뭄발생 상황에 대한 각 모형의 연계운영효과를 비교 분석함으로써 급속히 변화하고 있는 수자원 이용환경에서 보다 합리적인 댐군의 연계운영 방안을 제시하고자 한다.

• Management & Information Systems Review
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• v.38 no.4
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• pp.95-111
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• 2019

This study aims to measure effects of cause-related marketing by using consumer's preference of cause-related marketing product as a dependent variable. One of main factors influence on preference of cause-related marketing product is a product type. Previous research has shown that hedonic product is more effective for cause-related marketing than utilitarian product. The result was largely explained by the logic of guilt. However, there were conflicting results. In addition, the level of guilt may vary depending on the consumer characteristics or the market environment. Therefore, this study focuses on the impact of product type on the effect of cause-related marketing. For the Korean and Chinese markets, this study examines the effect of interactions between countries and product type. The result was significant. Specifically, there was a difference in preference of cause-related marketing product between Korean and Chinese consumers by product type. Based on the findings, implications and limitations of this study and future research directions were presented.

• The Journal of the Korea Contents Association
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• v.17 no.10
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• pp.420-451
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• 2017

This study verified the effectiveness of authentic leadership in promoting coopetition with the mediation of positive psychological capital and identified how this mediating effect of positive psychological capital is moderated by performance-based rewards Our findings showed that positive psychological capital played the role of mediator (indirect effect) between authentic leadership and coopetition. Also, performance-based rewards had negative conditional direct effect on the relationship between authentic leadership and coopetition as well as a positive mediated moderation (conditional indirect effect) when the relationship is mediated by positive psychological capital. This research presents a novel empirical study on the mechanism involved in the promotion of coopetition among organization members, especially concerning the antecendents involved at the individual level.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.295-297
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• 2005

본 논문에서는 지금까지 각각 독립적으로 운전되었던 동북아시아(대한민국, 북한, 러시아) 전력시스템이 계통 연계를 통하여 얻을 수 있는 경제적 효과에 대한 평가 프로그램의 개발에 대하여 설명한다. 본 평가 프로그램의 목적는 향후 동북아 전력시스템의 계통 연계시 각 나라들의 발전소 건설 및 운용, 그리고 연계설비(Tie line)의 투자비용을 최소화할 수 있는 방안을 찾아 내는 것이다. 이를 통해 독립적으로 운전되는 것에 비해 계통연계를 통한 것이 보다 높은 경제적인 효과를 거둘 수 있음을 최종적으로 보이고자 한다. 문제를 좀 더 쉽고 빠르며 효과적으로 풀기 위하여 신규 발전설비와 연계선로에 대한 계획측면의 변수와 발전양와 선로에 흐르는 조류양의 제약 그리고 각 노드에서의 전력수급 조건 둥의 운전측면의 변수를 함께 포함시킨 선형 계획법 (LP, Linear Programming) 모델 로 정식화한 뒤 최적화 프로그램인 CPLEX를 통하여 해를 구한다.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2003.06a
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• pp.70-73
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• 2003

기존의 영상검지기는 한정된 구간에서 차량을 추출, 추적하는데 본 논문에서 제안한 카메라간 연계 추적 방법은 두 대의 카메라를 서로 연계하여 차량을 추적함으로써 넓은 구간에서도 효과적으로 차량을 추적할 수 있다. 한 대의 카메라는 전방을 검지하고 다른 카메라는 후방을 검지하여 전방 검지영역에서 추적한 차량을 후방 검지영역에서도 연계하여 추적하게 된다. 연계 추적을 위해 전방 카메라에서 취득한 차량의 차선정보와 차량의 대표 gray level 정보를 후방 카메라로부터의 영상 분석시 이용하여 차량 연계 추적을 한다.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.289-293
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• 2005

본 연구에서는 일별 저수지군 최적연계운영 모형(CoMOM 4.0 : Coordinated Multireservoir Operating Model version 4.0)을 낙동강 수계 실시간 일별 운영에 CoMOM을 적용할 경우를 상정하여, 불확실성을 고려한 실시간 모의 운영을 수행하였다. 실시간 일 운영 시 며칠 정도의 유입량 예측은 가능할 것으로 예상하여 유입량 예측일수의 정확도 증가에 따른 연계 운영 효과를 산정해 본 결과, 전반적으로 과거 실적치에 비하여는 좋지만, 예측일 수가 늘어남에 따라 수계 내 연간 평균 저수량은 감소하는 대신 평균 발전량은 증가하여, 연계운영 총체적 효과가 기하급수적으로 증가됨을 알 수 있었다. 미래 유입량을 전혀 예측하지 못할 경우에는 일평균 유입량을 예측 유입량으로 하여 실시간 댐군 연계모의운영을 하였고, 그 경우에도 여수로 방류로 인한 수계 외 유출을 연 평균 약 214백만$m^3$ 정도 감소시키는 반면, 수계 내 전체 댐 군의 평균저수량을 55백만$m^3$ 증가 시키며, 연간 평균 발전량은 25GWh (약 22.5억원/년의 추가 발전수입) 증가 시킬 수 있을 것으로 분석되었다.

• Journal of Labour Economics
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• v.37 no.1
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• pp.29-57
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• 2014

Using unemployment insurance and income-contingent loan (ICL) that conditions repayment by debtors upon their incomes this paper characterizes an efficient income support system for the unemployed, which maximizes their lifetime utilities by effectively enhancing inter-state and inter-temporal consumption-smoothing subject to incentive constraints on the part of the beneficiaries. This paper also emphasizes the generality of the argument for a mix of ICL and subsidy that may be applied potentially to many types of government welfare program.

• Journal of the Korean Society of Hazard Mitigation
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• v.4 no.3 s.14
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• pp.61-72
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• 2004

In this research, multi reservoir operation methods for reservoirs in Han River are proposed based on the single dam operation models using fuzzy control techniques. The result of fuzzy controled single dam operation has shown that it can improve flood controllability at the downstream of dams. Among the many control rules of fuzzy operation, a rule that shows the most effective flood control rate at the downstream has been selected as Ike operation rule. The simulated results for 1990 and 1995 flood events are compared with historical ones. As the results, it is founded that suggested models can reduce the inundation of upstream and keep the water elevation lower at downstream, which make the proposed models as the effective methods in multi reservoir operation.