• Journal of applied mathematics & informatics
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• 제28권3_4호
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• pp.597-610
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• 2010

For a class of nonlinear bilevel programming problems in which the follower's problem is linear, the paper develops a genetic algorithm based on the optimality conditions of linear programming. At first, we denote an individual by selecting a base of the follower's linear programming, and use the optimality conditions given in the simplex method to denote the follower's solution functions. Then, the follower's problem and variables are replaced by these optimality conditions and the solution functions, which makes the original bilevel programming become a single-level one only including the leader's variables. At last, the single-level problem is solved by using some classical optimization techniques, and its objective value is regarded as the fitness of the individual. The numerical results illustrate that the proposed algorithm is efficient and stable.

• 한국기계가공학회지
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• 제16권4호
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• pp.140-146
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• 2017

As energy conservation and environmental issues are emerging as a hot topic around the world, consumers are demanding high-efficiency, eco-friendly products. In this study, the author proposed 120W LED lighting system that replace metal halide lamp (MHL) which is currently used in the industry. Furthermore, it would be possible to provide a perfect opportunity for Korea to rise as a global leader in the LED lighting industry through soundness evaluation of the LED lighting system that is applied.

• 인터넷정보학회논문지
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• 제18권5호
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• pp.113-121
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• 2017

Company A's core competency is IT internet security services. The Web diagnosis team analyzes the vulnerability of customer's internet web servers and provides remedy reports. Traditionally, Company A management has utilized a simple table format report for resource planning. But these reports do not notify the timing of human resource commitment. So, upper management asked its team leader to organize a task team and design a visual dashboard for decision making with the help of outside professional. The Task team selected the web security diagnosis practice process as a pilot and designed a dashboard for performance evaluation. A structural design process was implemented during the heuristic working process. Some KPI (key performance indicators) for checking the productivity of internet web security vulnerability reporting are recommended with the calculation logics. This paper will contribute for security service management to plan and address KPI design policy, target process selection, and KPI calculation logics with actual sample data.

• Advances in pediatric surgery
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• 제19권1호
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• pp.14-21
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• 2013

Pediatric liver transplantation has evolved into a definite and effective therapeutic modality for various liver diseases in the pediatric patient. During the last 25 years, liver transplant outcomes in Korea have reached international standards and Korea has become the leader in living-donor liver transplantation. This review will present the cumulative outcomes of pediatric liver transplantation performed in Korea and will focus on other issues of interest involving pediatric liver transplant recipients, especially in the field of immunosuppression and post-transplant lymphoproliferative disease.

• Asia Marketing Journal
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• 제20권2호
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• pp.85-98
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• 2018

Korea Ginseng Corporation is a global ginseng company, owning one of the most leading brands in Korea, CheongKwanJang. Although Korea Ginseng Corporation was an undoubted market leader in the red ginseng market, it faced a new challenge in 2012 due to the changes in market environment. In order to keep its market leadership in a saturated and competitive market, the company decided to extend its product lines alongside the launches of new brands. In this article, the authors demonstrate the development process of the company's brand portfolio strategy to reveal how the company turned CheongKwanJang into a mega-brand. Also, this paper explores the impact of CheongKwanJang's reputation on new brands, thereby illustrating how the company successfully managed to introduce new products outside of the red ginseng category, ranging from organic food to a pet food market.

• Asia Marketing Journal
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• 제15권4호
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• pp.187-200
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• 2014

The case study of OB shows dramatic market dynamics between leader brand vs. follower brand similar to Kirin vs. Asahi in Japan for two decades. Almost 20yrs ago, the brand status of OB was dramatically fallen because of the environmental pollution of subsidiary company and harsh competition of rivalry brand. But OB made a ground change in its brand strategy. OB departed from the pride in its past to bet on the new. OB decided to vitalize Cass brand through brand portfolio strategy. They deployed 3 phase articulated marketing plans; Phase I, Acquisition of Cass brand through M&A and strategic segmentation/targeting (1993-2005), Phase 2 - Mega Brand Strategy through Line Extension(2006-2009), Phase 3 - Experiential Marketing focused on Young Culture (2010- present). Finally, OB restored not only brand reputation of Cass and other brands but dominant market position in beer market. Now Cass has been growing rapidly in the last 20 years achieving 50% M/S. The three phases shows the typical successful process of brand management and revitalization adopting brand concept management and S-T-P strategy of manufacturing company.

• 공학교육연구
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• 제23권3호
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• pp.13-19
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• 2020

The purpose of this study is to develop and apply a make-a-thon program based on engineering problem solving for science high school students and to analyze the changes of participating students. Through the consultation of teachers and experts, a team-based and student-driven engineering problem-solving-oriented make-a-thon program was developed. And, the program operated using KAIST's human and material resources for 51 students. Students composed of 12 teams studied 12 topics through an engineering problem-solving process, and the overall program satisfaction was very high, on average 4.62. Through this program, students' creative leader competency have been positively changed, especially in cognitive characteristics (diffusion thinking, problem solving ability) and social characteristics (pursuit of social values). Attitudes toward engineering also changed positively, especially in terms of difficulty of engineering, interest in engineering, gender role in engineering, and engineering and occupational factors. In conclusion, it was confirmed that this program is very effective for science high school students with high demand for engineering education.

• 한국초등과학교육학회지:초등과학교육
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• 제20권2호
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• pp.177-186
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• 2001

Recently, introduced open education, there are some models applied several cooperative teaming, but there is no case in applied Jigsaw Ⅱ. So this research is selected objects which are 147 students in the fifth grade in 1999' school year and 143 students in 2000's on Yongwon elementary school. It makes share a partial responsibility for planner, leader, investigator, helper, writer and reporter in the small groups, and apply the Jigsaw Ⅱ model. Qualitative and quantitative analyses show that they have effects of Jigsaw Ⅱ cooperative Learning on Student's knowledge, inquiry ability and attitudes on Elementary School Science Study. The final results are following. The significance of Knowledge has .02 in 1999 and .01 in 2000. Testification of Inquiry ability has 1.75 in 1999 and 2.25 in 2000. The significance of Attitudes has .03 in 1999 and .00 in 2000. Research that has emerged from the cooperative teaming has led us to better understandings of multi purposed roles, interactions, and communities that arise when students work together to team science. Each of students can also cooperative as co-builders, working as equal participants to create a product that is better than that while would have built by either individual alone. Upon asking their intention, cooperative loaming shows more participation.

• 한국농촌건축학회논문집
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• 제13권3호
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• pp.91-98
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• 2011

Regional closed schools of about more 3,348(2010 year) have occurred all over the country according to governmental policy of 1982. Moreover, The applications of be closed school are not efficient and few studies about using community center. Also, Farmer which is the leader of revitalization of rural village could not have advantages about community center in rural area than in urban area. Therefore, The propose of study is increasing values of culture and local by using community center with closed schools. For moving ahead with study, I analysis about causes of origination of closed schools with literature and refer to the reference of the current of situation in Gyeongbuk Local Education Authority and National Statistical Office and Comprehensive Rural Community Development Program of Minister for Food, Agriculture, Forestry and Fisheries of Korea for examination of conjugating closed school through community center. According to the research, community center was to be included hall, visiting center, exhibiting space, conference room, experience room, multipurpose room, dining room, welfare space and specialized room with revitalization of rural village. I proposed improvement of law and administration and suggest several cases which already in utilization.

• 한국보육지원학회지
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• 제11권1호
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• pp.329-354
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• 2015

본 연구에서는 학령 초기 아동의 사회적 행동을 향상시키기 위한 사회성 훈련 프로그램을 개발하고, 프로그램 실행 과정에서 나타나는 아동의 사회적 행동을 관찰하여 변화의 과정을 질적 분석을 통해 탐색하였다. 이를 위해 김민정(2008)의 사회적 기술훈련을 수정 보완하여 7명의 초등학교 1학년 아동을 대상으로 8회기의 프로그램을 실시한 후, 참여관찰 노트, 프로그램 진행자의 일지, 보조진행자의 칭찬 노트, 비디오 녹화 자료, 아동의 그림일기 자료들을 전사, 코딩, 주제의 발견 단계를 거쳐 분석하였다. 그 결과, 아동의 사회적 행동과 관련하여 다음과 같은 주제를 도출하였다. 첫째, 관계형성의 시작: (1) 수줍음과 정서적 위축, (2) 자기만의 세계에 몰입, (3) 나누기' 및 '함께하기'의 어려움, (4) 타인과의 부정적 상호작용, (5) 사회적 규칙준수의 어려움. 둘째, 정서 및 의사표현의 변화: 분명하고 직접적인 정서 및 의사표현. 셋째, 친사회성의 변화: (1) 주위에 대한 관심 및 상호작용 증진, (2) 협동 놀이, (3) '나누기' 및 '도움주기'등의 베푸는 행동. 넷째, 사회적 기술의 변화: (1) 사회적 규칙의 인식 및 실천, (2) 사회적 문제 해결하기. 본 연구는 질적 연구를 통해 사회성 훈련 프로그램이 학령 초기 아동의 사회적 기술과 정서표현에 미치는 긍정적 변화를 관찰함으로써 그 효과를 확인하였다.