• Journal of the Korean Data and Information Science Society
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• v.22 no.5
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• pp.877-884
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• 2011

The decision tree is a representative algorithm of data mining and used in many domains such as retail target marketing, fraud detection, data reduction, variable screening, category merging, etc. This method is most useful in classification problems, and to make predictions for a target group after dividing it into several small groups. When we create a model of decision tree with a large number of input variables, we suffer difficulties in exploration and analysis of the model because of complex trees. And we can often find some association exist between input variables by external variables despite of no intrinsic association. In this paper, we study on the removal method of unnecessary input variables using multiple external association rules. And then we apply the removal method to actual data for its efficiencies.

• The Transactions of the Korea Information Processing Society
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• v.6 no.12
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• pp.3710-3717
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• 1999

For the development of unmanned autonomous vehicle, it is essential to detect obstacles, especially vehicles, in the forward direction of navigation. In order to reliably exclude regions that do not contain obstacles and save a considerable amount of computational effort, it is often necessary to confine computation only to ROI(region of interest)s. A ROI is usually chosen as the interior region of the lane. We propose a computationally simple and efficient method for the detection of lanes based on Hough transform and quadratic curve fitting. The proposed method first employs Hough transform to get approximate locations of lanes, and then applies quadratic curve fitting to the locations computed by Hough transform. We have experimented the proposed method on real outdoor road scene. Experimental results show that our method gives accurate detection of straight and curve lanes, and is computationally very efficient.

• Journal of the Korean Home Economics Association
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• v.50 no.6
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• pp.99-117
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• 2012

This study aimed to measure consumer information competency, which indicates consumers' general ability to search and utilize information. The model of this study was constructed in order to identify how consumer information competency influences the efficiency and the effectiveness of external information search. The model was verified with related prior knowledge as a moderator variable in order to understand holistic consumer information search activity. The result of the study is as follows. First, the concept of consumer information competency was constructed with four sub-abilities: define, search, extract, and synthesis & use. The ability of define was the highest, as opposed to the ability of extract, which was the lowest. Second, consumer information competency was lower for women as well as for low family income. The sub-abilities of search and synthesis & use were lower for aging consumers. Third, consumer information competency has positive effects on information search efficiency and effectiveness. Moreover, the efficiency influences the effectiveness positively. Fourth, prior knowledge moderates the effect of consumer information competency to the efficiency. Only for consumers with high knowledge the efficiency has the effect of mediating between consumer information competency and the effectiveness.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.31-32
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• 2000

어군의 이동경로(Priede ＆ Swift, 1993)를 어류 외적인 주변 환경변수와 어류의 내적인 생리생태 등에 따른 행동요인을 고려하여 보다 합리적이고 논리적인 방법으로 어군탐색을 효율적으로 수행할 필요가 있으며, 따라서 어류이동경로 추적에 대한 모델링과 시뮬레이션(Arnolds ＆ Holford, 1995) 기법의 개발이 필요한 실정이다. 따라서 본 연구는 저서성 어류의 이동 궤적에 관한 현장 계측자료를 해양환경요인과 관련시켜 분석하고, 어류이동에 관한 수치행동의 모델링의 주요한 변수를 파악하였다. (중략)

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.47-49
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• 2014

최근 e-Navigation 소프트웨어의 개발과 검증을 위한 다양한 시도가 국내외적으로 진행되고 있다. 본 논문에서는 국제공동실험에서 사용되고 있는 오픈소스 e-Navigation 소프트웨어를 대상으로 역공학을 통해서 해외에서 각종 실험이 시도 되고 있는 e-Navigation 소프트웨어의 기능적, 구조적 특성 등을 분석해 본다. 이 실험을 통해 관련 시스템에 대한 국제적 기여를 탐색하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.589-591
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• 2002

본 논문에서는 메쉬 구조의 다중처리시스템을 위한 새로운 할당방법을 제안한다. 이 할당방법은 다른 가용 서브메쉬와 중첩되지 않는 독립 가용 서브메쉬를 유형에 따라 분류하여 유형별 가용 서브메쉬 리스트를 생성한다. 그리고 태스크의 유형에 따라 해당 유형별 가용 서브메쉬 리스트에서 최적할당이 가능한 서브메쉬를 찾음으로써 서브메쉬를 탐색하는데 소요되는 시간을 줄인다. 이 때 서브메쉬를 찾지 못하면 확장지수를 이용하여 더 큰 가용 서브메쉬를 형성한 후 할당함으로써 태스크의 대기 시간을 줄이고, 이 결과로 외적단편화를 줄이는 효과도 얻는다. 또한 할당 해제시 독립 가용 서브메쉬는 다른 가용 서브메쉬의 크기 에 변화를 주지 않기 때문에 그 유형에 따라 유형별 가용 서브메쉬 리스트에 삽입한다. 그럼으로써 할당 해제 후 유형별 가용 서브메쉬 리스트를 재생성하기 위해 전체 메쉬 구조를 탐색 할 필요가 없어진다.

• 한국체육학회지인문사회과학편
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• v.54 no.5
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• pp.207-219
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• 2015

The purpose of this study was to test the validation of the Korean version of the Talent Development Environment Questionnaire for sport(TDEQ; Martindale et al., 2010), developed through the conceptual and statistical verification stages(substantive stage-structural stage-external stage). In accordance with the procedure of translation, the substantive concepts of the items were reviewed. The data were collected from a sample of 244 ; 117 high school student-athletes and 127 university student-athletes. In order to test the internal structure of TDEQ, EFA/CFA, and internal consistency were performed. As a result, Korean version of the TDEQ had 5 factors with 38 items. External relationship by correlation analysis and group differentiation analysis were obtained to enhance the validity of the test. Overall, the Korean TDEQ will be used as a diagnostic and evaluation tool at the stage of detection, identification, selection, and development of Sport Talent.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.542-546
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• 2009

This paper introduces a Mixed-Reality based Software technology in Smart-Phone Environment. The field of Mixed-Reality in mobile environment is relatively young. but Cause to develop Mobile infra and improvement of mobile device, open-platform mobile OS, the request extended This paper suggest the method for Marker Detection and Marker Tracking method. This method is the one of some kind of a base-technology in Mixed Reality. this method is to effect to location and registration. This paper suggest the method in low CPU computing power. Using a deformable searching area, the method improve computing power. and Using a Cam-shift algorithm, we suggest a calibration free method.

• Journal of Korean Classical Literature and Education
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• no.35
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• pp.5-46
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• 2017

This study aims to investigate the context of materials in literature textbooks and the awareness about the educational value of classical literature, as part of an interest in literature education phenomena. This study accepts the premise that textbooks affect the practice of classical literature education and, in particular, materials in textbooks are chosen according to the intentions, demands, and perspectives of education in specific social conditions. I divided the educational value of classical literature into two categories, classical and literary value, and investigated the actual conditions and context of materials of literature textbooks based on the 2009 revised curriculum and the 2011 revised curriculum. Classical literature is generally alienated and excluded; contemporary literature materials are mostly included and organized in the domains of 'the role of literature', 'reception and production of literature' and 'literature and life.' In addition, the tendency to heighten classical value and diminish literary value is deepening. In order to solve the problem that classical literature is only included as the product of the past, changes must be made not just to the curriculum, which are external changes, but to the awareness of the essence of classical literature, which are internal changes. Above all, generality as 'literature' and the sense of distance about space and time as 'classic' should be connected to various relationships which respond to problematic situations and the demands of learners. Based on the relationships, we can expect a rich diversity of contexts and aspects of included classical literature. In addition, an extension of the width and scope of included classical literature is anticipated. The reduction of workload, the advent of the concept of capability and the dissolution of traditional literature concepts are the changes of external environment, which is continuously requiring renewed investigation into classical literature beyond simple appropriateness.

• 한국경영정보학회:학술대회논문집
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• 2007.11a
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• pp.328-333
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• 2007

최근들어 꾸준히 증가하고 있는 오픈소스를 통한 소프트웨어 개발에 대한 관심과 참여는 국가적 규모의 지원과 활성화 방안에 대한 연구로 이어지고 있다. 그중에서 오픈소스 개발환경의 한 요소인 개발자들에 대한 이해는 가장 모든 관련연구에 우선하는 핵심적인 연구주제로 다루어져 왔으며, 연구자들은 국제적인 규모의 프로젝트를 대상으로 어떤이들이 무슨 동기로 참여하고 있는가에 대한 질문을 위주로 연구해왔다. 본 연구는 국지적 관점을 추가하여 이러한 연구노력의 연장선상에서 오픈소스 개발에 참여하고 있는 한국인 개발자들을 대상으로 탐색적으로 살펴본다. 본 연구는 한국인 오픈소스 개발자들은 누구인가라는 질문에 대한 답변을 기술통계적 분석기법을 이용하여 시도하고, 또 한국인 참가자들 오픈소스개발 참여에 대한 내재적인 동기와 외적(또는 환경적)동기에 대해 기존 연구들과 비교분석을 통해 이해하려고 시도한다. 이와같은 비교관찰을 토대로 한국의 오픈소스 개발환경에 대한 좀 더 포괄적인 지식을 얻어낼 수 있을 것으로 기대되며, 또 오픈소스 개발과 관련한 기타 연구에 있어 인적요소에 대한 이해를 증진시키는데 기여할 수 있을 것으로 생각된다. 본 연구는 방법론으로써 각종 국내외 오픈소스 프로젝트들에 가입하여 활동중인 한국인 개발자들을 대상으로 전자메일을 이용한 사전조사(설문)를 실시하였다.