• 한국콘텐츠학회논문지
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• 제13권11호
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• pp.382-395
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• 2013

기상정보 제공자들은 예보사용자들이 제공되는 예보서비스에 얼마나 만족하고 있는지를 알고 싶어 한다. 더 나은 예보서비스 제공을 위해서 각국의 기상 커뮤니티들은 사용자들의 만족도에 관한 다양한 설문조사를 진행하고 있다. 하지만 대부분의 설문조사들이 단순하게 사용자들이 얼마나 서비스에 만족하는지를 질문하고 있기 때문에 설문 결과의 설명력이 떨어지고, 예보서비스의 전략수립에 활용되기 어렵다. 본 연구에서는 예보의 가치를 평가하는 유용한 도구인 $2{\times}2$ 검증테이블에 기존의 비용-손실이 아닌 만족-불만족 개념을 적용하여 상해와 서울에서 제공된 24시간 강수예보의 만족가치를 도출하였다. 그리고 예보에 대한 개인의 만족가치뿐만 아니라 예보 사용자 그룹의 만족가치를 평가하였다. 그 결과, 확정예보 사용자 그룹의 만족가치를 높이기 위해선 예보 정확도의 향상이 유용하지만, 확률예보의 경우엔 사용자 그룹의 불만족 정도와 예보확률의 사용 분포를 파악하는 것이 중요한 것으로 나타났다. 따라서 기상 커뮤니티들이 예보 사용자들에게 더 나은 만족가치를 제공할 수 있는 방안을 찾는데 도움을 줄 수 있을 것이다.

• 한국재난정보학회 논문집
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• 제9권2호
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• pp.220-230
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• 2013

본 연구는 우발상황에 유연하고 능숙하게 대처해야 하는 훈련을 받고 있는 경호전공 대학생들의 응급처치에 대한 인식을 조사하여 응급처치의 중요성과 효율적인 교육 방법을 제시하고자 하였다. 이 연구에서 수집된 자료의 분석은 통계프로그램인 SPSS 18.0을 이용하여 얻은 결과는 다음과 같다. 첫째 응급처치교욱을 받은 사람과 받지 않은 사람의 평균 점수차이가 없는 것은 교육이 제대로 이루어지지 않거나 전문화되고 체계적인 교육이 필요하다는 것을 증명하였다. 둘째, 응급처치교육이 제대로 실시되고 있지 않으며 많은 문제점이 도출되어 있다. 셋째, 응급처치 교육기관에 따른 지식수준의 차이가 없으므로 응급처치교육을 받는 장소는 지식수준에 영향이 없다. 따라서 우발 상황에 적극 대처할 수 있는 역량을 높이기 위한 실질적인 응급처치 교육이 반드시 필요하다고 할 수 있다.

• Journal of Electrical Engineering and Technology
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• 제10권2호
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• pp.474-486
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• 2015

This paper proposes a multi-objective optimal placement method of Phasor Measurement Units (PMUs) in large electric transmission systems. It is proposed for minimizing the number of PMUs for complete system observability and maximizing measurement redundancy of the buses, simultaneously. The measurement redundancy of the bus indicates that number of times a bus is able to monitor more than once by PMUs set. A high level of measurement redundancy can maximize the system observability and it is required for a reliable power system state estimation. Therefore, simultaneous optimizations of the two conflicting objectives are performed using a binary coded firefly algorithm. The complete observability of the power system is first prepared and then, single line loss contingency condition is added to the main model. The practical measurement limitation of PMUs is also considered. The efficiency of the proposed method is validated on IEEE 14, 30, 57 and 118 bus test systems and a real and large- scale Polish 2383 bus system. The valuable approach of firefly algorithm is demonstrated in finding the optimal number of PMUs and their locations by comparing its performance with earlier works.

• 한국경영과학회지
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• 제21권3호
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• pp.11-46
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• 1996

The objectives of this research paper are to identify the types of the firm's new product development strategy and their characteristics about business strategy, to examine the effect of each type on new product outcomes, and to explore the contingency variable influencing the relationship between these types and new product outcomes. The result of the research are summarized as follows : First, in terms of both the resource allocation for product innovativeness and technology acquisition method, this study suggests 9 types of the firm's new product development strategies- Type 1 (pursuing low innovative products/relying on external technology), Type 2 (pursuing low innovative products oriented/relying on internal technology), Type 3 (pursuing low innovative products/relying on mixed technology), Type 4 (pursuing high innovative products/relying on internal technology), Type 6(pursuing high innovative products /relying on mixed technology), Type 7 (balancing low and high innovative products/relying on external technology), Type 8 (balancing low and high innovative products/relying on internal technology), Type 9 (balancing low and high innovative products/relying on mixed technology). Second, these 9 types are deeply associated with the firm's business strategic variables such as product differentiation and market differentiation, and exhibit different level of both technical and commercial performance of new products. Finally, the effects of these types on new product outcomes are different according to industrial environment and firms' characteristics with respect to size and technological capability.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.79-82
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• 2002

The addition of switches to a distribution feeder does, in general, increase reliability by decreasing the duration of the outage of many to the customers on the feeder. To cover its service area so that feeder-level delivery reaches sufficiently close to all customers, feeders typically split their routes many times, in what is often called a lateral feeder. It is interesting to note, however, that the effectiveness of a switch is very much dependent on the types of lateral feeder. The types of lateral are classified into two types. The first is loop lateral feeder that can connect its load to an adjacent feeder through a tie line in case that a fault occurs in its feeder and it is laid out so that every feeder has complete fault backup through re-switching of its loads to other sources like a main feeder. The second is the radial lateral feeder cannot connect its load to an adjacent line, no provision is made for contingency backup of feeders. There are no other circuits in the radial lateral feeder form which to restore power. In this study, we evaluate the effectiveness of a switch installation between on the radial and loop lateral feeders to increase reliability by decreasing the duration of the outage. These results can help power utility to design the switch layouts on the radial and loop lateral feeder system.

• 한국환경과학회지
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• 제22권8호
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• pp.953-963
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• 2013

Reliable long-term streamflow forecasting is invaluable for water resource planning and management which allocates water supply according to the demand of water users. Forecasting of seasonal inflow to Andong dam is performed and assessed using statistical methods based on hydrometeorological data. Predictors which is used to forecast seasonal inflow to Andong dam are selected from southern oscillation index, sea surface temperature, and 500 hPa geopotential height data in northern hemisphere. Predictors are selected by the following procedure. Primary predictors sets are obtained, and then final predictors are determined from the sets. The primary predictor sets for each season are identified using cross correlation and mutual information. The final predictors are identified using partial cross correlation and partial mutual information. In each season, there are three selected predictors. The values are determined using bootstrapping technique considering a specific significance level for predictor selection. Seasonal inflow forecasting is performed by multiple linear regression analysis using the selected predictors for each season, and the results of forecast using cross validation are assessed. Multiple linear regression analysis is performed using SAS. The results of multiple linear regression analysis are assessed by mean squared error and mean absolute error. And contingency table is established and assessed by Heidke skill score. The assessment reveals that the forecasts by multiple linear regression analysis are better than the reference forecasts.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제20권2호
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• pp.90-96
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• 2009

Objectives: This study examined clinical characteristics associated with bullying in children with attention-deficit/hyperactivity disorder(ADHD). Methods.: Children and their parents were asked to fill out a structured self-report form regarding bullying incidents. To evaluate the characteristics of the children, the results of the ADHD Rating Scale, the Korean version of the Child Behavior Checklist, the ADHD Diagnostic system and the Emotional Recognition Test were used. The agreement of bullying data between each child and their mother and father was measured using Cohen's kappa. The association between victim and perpetrator was analyzed by calculating a contingency coefficient based on chi-square. To compare the characteristics of victimized children and didn't, an independent sample T-test was performed. Results: When children were victims of bullying incidents there was significant agreement between children and parents on the information provided on the self-reports. However, more children reported themselves as a perpetrator of bullying than their parents did. Victimization, that is, the tendency towards being a perpetrator, is associated with the higher level of parental reports of aggressiveness. Conclusion: Victimization of bullying is associated with aggression in children with ADHD. This study suggests that victimized children with ADHD warrant careful evaluation, in particular with regard to the credence placed on parental reports of aggressiveness, and management for aggression.

• The Journal of Asian Finance, Economics and Business
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• 제7권4호
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• pp.197-203
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• 2020

This study investigates graduate competencies that can improve the uptake of higher education graduate outcomes in the working environment in Indonesia. This research was conducted by collecting data through sending questionnaires directly by the research team, via courier, or via postal service to respondents. A survey with questionnaire is carried out on April 2019, and the data from 117 respondents was analyzed. The sample population was all private higher education in the area of the I-XIV Higher Education Service Institution in Indonesia. This study employs factor analysis and structural equation modelling. The results show that the Graduates' competencies had a significant direct effect on the uptake of higher education graduates in the job market. The indirect effect of a Diploma Supplement and networking as mediation has a level of influence that is higher than the direct effect of graduate competence on the uptake of higher education graduate outcomes in the job market. The findings suggest that the Diploma Supplement and networking can increase the uptake of higher education graduates in Indonesia as expected by stakeholders and be able to compete in the global or international scale of environmental working. The professionalism of lecturers has a significant influence on the quality of learning.

• 유통과학연구
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• 제18권11호
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• pp.91-103
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• 2020

The recent Covid-19 outbreak has caused severe disruption of the global supply chain, which tests firms' ability to survive and build resilience. The concept of adaptive supply chain management (A-SCM) has never been tested against a severe supply chain disruption, such as a pandemic. Purpose: The aim of this study is to examine how firms in Indonesia develop resilience through the implementation of components of adaptive supply chain management, namely risk management, resource reconfiguration and supply chain flexibility, in order to survive severe supply chain disruption. Research design, data and methodology: A qualitative method and PLS-SEM were used to analyze 120 data collected from Indonesian manufacturing firms in various industries. Results: The findings show that risk management, resource reconfiguration, and supply chain flexibility are important components that make up A-SCM. However, only risk management contributes to help build firm resilience in the presence of severe supply chain disruption. Conclusions: The components of A-SCM have been empirically tested. The implication is that managers should carefully use RM to prepare firms for different scenarios to develop contingency strategies. This research contributes to the supply chain management body of knowledge in the context of pandemic-level disruption and broadens the dynamic capabilities perspective.

• 한국산학기술학회논문지
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• 제19권10호
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• pp.214-221
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• 2018

본 연구의 목적은 스포츠 스폰서십의 부정적인 효과와 이에 대한 대응방안을 규명하기 위한 것이다. 유명 스포츠인과 관련한 부정적인 사건이 발생하였을 때 유명 스포츠인의 책임수준이 소비자들이 유명 스포츠인과 해당 보증인이 광고하는 제품에 대해 가지는 태도에 미치는 영향력을 확인하고자한다. 또한, 유명 스포츠인의 책임수준이 유명 스포츠인과 제품에 대한 태도에 미치는 영향력에 있어서 대응 전략의 조절효과를 검증하고자 한다. 이를 위해 대학생 총 135명을 대상으로 가상의 시나리오를 포함하는 설문조사를 실시하여 자료를 수집하였으며, 이 중 126부를 분석에 이용하였다. 가설 검증을 위해 분산분석을 실시한 결과, 부정적 사건이 발생하였을 때 유명 스포츠인의 책임수준이 높을수록 실험참가자들은 유명 스포츠인과 해당 유명 스포츠인이 광고하는 제품에 대해 부정적인 태도를 형성하는 것으로 확인되었다. 그리고 조절효과 분석결과, 부정적 사건에 대한 유명 스포츠인의 책임수준이 유명 스포츠인과 제품에 대해 미치는 영향력은 대응전략의 유형에 따른 유의미한 차이를 보여주었다.