• Journal of Korea Port Economic Association
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• v.23 no.2
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• pp.121-144
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• 2007

In general, the design of container yard and container handling system on container terminal are focused on operation of shipside than service about chassis from outside(C/O). It is not efficient for chassis from outside. The purpose of this paper is functional assessment of efficient container terminal and for higher performance of container terminal. first, the items which are concerned with container handling at the planning of container terminal are investigated and extracted through the practical data analysis of container terminal. Also, verified problems of planning and present condition through the functional assessment. Secondly, the improvements for container throughput in container yard are proposed and examined the effectiveness of improvements about queuing time of chassis from outside and service time of transfer crane by the evaluation decision model based upon multi criteria objectives.

• Journal of the Korea Society of Computer and Information
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• v.25 no.6
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• pp.251-261
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• 2020

Based on the recent consensus on the need for software education, software education has become mandatory in universities in Korea. However, the suitability of class contents and the relationship between class contents and learner satisfaction has not been fully discussed. Therefore, in this paper, we analyzed the suitability of the contents used in the basic software education for the humanities students from the learner's perspective. For this purpose, three types of curriculum, which are 'computer science', 'usage of tools, and humanities in the digital world' and 'computational thinking', were compared using the lecture assessment questionnaire. As a result, we found that the learners evaluated positively over the curriculum that focused on the use of tools, the humanities approach, or the thinking ability rather than the theoretical contents of computer science. We also found that the subjects related to computer science could not give high satisfaction due to their unfamiliarity, relatively low academic value was given to the tool-centered curriculum, and fatigue was expressed in discussion-based thinking ability education.

• Journal of The Korean Association For Science Education
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• v.34 no.2
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• pp.135-146
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• 2014

The purpose of this study is to explore evaluation criteria that pre-service elementary teachers employ as they evaluate and select models to explain electric circuits. Thirty junior students in a university of education have participated in the study as a part of the science education course in which they were enrolled. The lessons for the participants have been organized as a cyclic sequence of different modeling pedagogies including the expressive, experimental, and evaluative modeling. The pre-service teachers have been given five electric circuits in order and asked to create models and further develop them through peer discussion. Their modeling activities have been video- or audio-recorded, and the recordings and their transcripts have been analyzed using a framework of model evaluation criteria. It reveals that the types and frequencies of evaluation criteria used are different between situations of model development and model selection. While empirical and theoretical criteria have been used dominantly in both situations, more various criteria have been employed in the situation where the pre-service teachers selected one model among alternatives. Implications for science education and science education research have been suggested.

• Journal of the Korea Society of Computer and Information
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• v.12 no.6
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• pp.59-68
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• 2007

The purpose of this paper is to evaluate usability quality through investigating the factors of usability for internet shopping mall websites. For this study, previous studies were investigated and experts' discussions were held. In result, six characters of usability were chosen such as content satisfaction. customer attraction satisfaction, price information satisfaction, public security satisfaction, user interface satisfaction. and process of transaction satisfaction that affect usability of shopping mall websites and the evaluation models of 72 detailed measure factors were established. Since these 72 sub-factors inc)ode the key words of HTML, XML, JSP, and ASP from the target websites. 33 measurable sub-factors in the information were measured through usability evaluation experiment. In addition, a questionnaire about usability measure factors was executed after preferable websites and not preferable websites are selected. After that, we verified the reasonability of usability measure model factors comparing the results of the evaluation experiment with the result of the questionnaire. The time it takes to measure the usability of shopping mall websites can be reduced by using this measurement supporting tool. Also, this tool may be used to estimate the usability during the development of a shopping mall website.

• Communications for Statistical Applications and Methods
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• v.18 no.3
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• pp.343-355
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• 2011

For a data with the assumption of the mixture distribution, it is important to find an appropriate threshold and evaluate its performance. The relationship is found of well-known nine classification accuracy measures such as MVD, Youden's index, the closest-to-(0, 1) criterion, the amended closest-to-(0, 1) criterion, SSS, symmetry point, accuracy area, TA, TR. Then some conditions of these measures are categorized into seven groups. Under the normal mixture assumption, we calculate thresholds based on these measures and obtain the corresponding type I and II errors. We could explore that which classification measure has minimum type I and II errors for estimated mixture distribution to understand the strength and weakness of these classification measures.

• The Korean Journal of Applied Statistics
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• v.18 no.2
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• pp.435-443
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• 2005

Coefficients of determination in logistic regression analysis are defined as various statistics, and their values are relatively smaller than those for linear regression model. These coefficients of determination are not generally used to evaluate and diagnose logistic regression model. Liao and McGee (2003) proposed two adjusted coefficients of determination which are robust at the addition of inappropriate predictors and the variation of sample size. In this work, these adjusted coefficients of determination are applied to variable selection method for logistic regression model and compared with results of other methods such as the forward selection, backward elimination, stepwise selection, and AIC statistic.

• Journal of Wetlands Research
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• v.10 no.3
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• pp.133-139
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• 2008

Urban streams are degrading functional role due to development and pollution. This study chose the representative stream of Do-rim and identified flora and fauna. The ecological survey aimed at identifying indicator of urban streams for measuring urban healthiness and we discussed the possibility of wetland conservation area. From the beginning of Dorim stream to An-yang mixture we were successfully identified 113 species of plants, 9 of mammals, 23 of birds, 4 of amphibians, 2 of reptiles and 2 of fish species. Terrestrial insects were 71 species. The wetland vegetation is quite various and we suggested 4 different vegetation zones (aquatic vegetation zone, emergent zone, riparian-meadow zone, riparian-woodland zone) depending on distance from the flowing water stream and vegetation characteristics for urban stream management.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.600-607
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• 2008

메타버스 개발을 위한 세계 각국의 행보가 빨라지고 있다. 미국의 <세컨드라이프>를 시작으로 MS와 구글이 차세대 메타버스 개발을 서두르고 있고, 일본에서도 , , 등이 이미 출시되었거나 출시를 앞두고 있다. 이에 발맞춰 메타버스에 관한 연구도 한창인데, 2006년 5월 미국 캘리포니아에서 열린 제1회 메타버스 로드맵 서alt(Metaverse Roadmap Summit)이 대표적이다. 미국미래학협회(ASF)주최로 열린 이 행사에는 미국의 저명한 IT전문가, 게임제작자들이 대거 참가했고, 조직위측은 이날 햇사에서 진행된 수십 시간 분량의 토론을 인터넷에 고시해서 1년동안 각계각층의 의견을 수렴했다. 그리고 1년 후인 2007년 6월 <메타버스 로드맵 3D웹으로 가는길>을 발표됐다. 뿐만 아니라 비슷한 시기에 일본의 <노무라연구소>에서도 IT로드맵을 발표하고 메타버스의 발전전망을 제시했다. 이에 반해 세계최고의 IT기술력을 자랑하는 국내에서는 메타버스에 관한 개발과 연구가 매우 미흡한 실정이다. 이에 본 고에서는 미국의 <메타버스 로드맵>과 일본의 을 중심으로 메타버스의 개념과 발전전망을 살펴보고, 현존하는 가상세계 중 메타버스 개념에 가장 근접했다고 평가받는 린든랩의 <세컨드라이프>의 의의와 한계를 짚어보았다. 또한 제2, 제3의 <세컨드라이프>를 노리고 있는 세계 각 국의 메타버스 개발동향을 분석하고 이를 통해서 차세대 메타버스 개발의 성공조건으로서 풍부한 콘텐츠 제공과 SNS기능의 강화, 미러월드의 발전가능성등에 주목해야 함을 알 수 있었다. 이러한 연구결과는 90년대 온라인게임의 성공 이후 장기간 침체 현상을 보이고 있는 우리의 가상세계 개발연구에 유의미한 시사점을 지닌다고 하겠다.

• KLA journal
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• v.39 no.5 s.312
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• pp.60-69
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• 1998

제64차 국제도서관연맹(IFLA)대회가 ‘정보와 문화의 교차로에서’라는 주제아래 8월 16일부터 21일까지 네덜란드 암스테르담에서 개최되었다. IFLA 총회가 네덜란드에서 개최된 것은 1939년 헤이그와 암스테르담, 그리고 1966년 쉐베닝겐에서 열린 데 이어 이번이 세 번째이다. 이번 대회는 공식집계에 따르면 세계 120개국에서 3,328명의 도서관인들이 참가하는 대성황을 이루었다고 한다. IFLA 대회는 회원국을 순회하면서 열리는데 지난해에는 덴마크 코펜하겐에서 열렸다. IFLA는 1927년 창설된 비정부기구로서 UNESCO와 함께 공식적으로 활동해왔다. IFLA의 목적은 도서관 활동과 문헌정보학 전반에 걸친 국제적인 이해와 협력, 토론, 연구 및 개발을 증진시키고 도서관인들이 국제적인 공동 관심사를 논하는 장을 제공하는 데 있다. 현재 회원으로 141개국 1400이상의 도서관 및 관련 단체들이 가입되어 있다. IFLA조직은 헤이그에 본부를 두고 있으며, 운영 조직으로 심의 평가를 담당하는 실행위원회와 전문위원회 그리고 4개의 자문위원회로 구성되어 있다. 실행위원회는 IFLA의 정책, 운영과 재정에 대하여 책임을 지어, 전문위원회는 두 개의 하부조직인 전문가 그룹과 5개 코아 프로그램에 의해 수행되는 전문적인 활동의 기획과 프로그래밍에 대하여 모니터 한다. 전문가 그룹이란 8개의 부회와 그 아래있는 34개의 분과와 11개의 원탁회의를 말한다. IFLA대회는 한국도서관협회가 주최하는 전국도서관대회보다 좀더 규모가 큰 행사라고 생각하면 상상하기가 쉬울 것이다. 대회 전체를 아우르는 주제가 설정되어 있고, 그 아래 각 분과별 발표회 또는 원탁회의가 동시에 여러 곳에서 진행된다. 따라서 참가자는 프로그램을 보고 자신이 참석할 분과나 포럼 등을 미리 정해두지 않으면 우왕좌왕하게 된다. 그리고 참석기간 중에는 매일 발행되는 를 반드시 참고할 필요가 있다. 이 자료는 IFLA 대회 일정의 변경이라든가, 하루 동안 일어난 소식을 알려주는 일종의 신문과 같은 역할을 한다.

• Communications of Mathematical Education
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• v.21 no.4
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• pp.575-596
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• 2007

This study investigates preservice teachers' development of subject-matter knowledge and pedagogical content knowledge in teaching function concept. This development takes place in the pedagogical mathematics courses in which the theory of constructivism and cooperative learning theory are aligned. Pre and post courses test were administered to examine the development and the follow-up interviews were conducted to gain more details. Analysis of the written questionnaire results and interview transcripts reveal that their limited concept image can be extended and developed in depth through pedagogical mathematics courses that apply reformed teaching methods.