• Annual Conference of KIPS
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• 2000.10a
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• pp.739-742
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• 2000

본 논문에서는 객체지향 데이터베이스 시스템을 이용하여 대용량 멀티미디어 데이터를 저장 및 검색하는 멀티미디어 데이터 관리 시스템(Multimedia Data Management System : MDMS)을 설계 구현한다. 따라서, 사용자, 응용 및 데이터베이스 각 계층에 객체지향 설계 방법을 적용시켜 일관된 인터페이스와 다양한 응용 분야의 확장을 유도하고 기존의 파일 단위의 관리 방법과 데이터베이스 저장 관리 방법을 선택 또는 동시 이용 할 수 있도록 하여 관리자 요구 수용의 폭을 넓힌다. 또한, 질의에 대한 효율적인 검색을 위하여 질의 분석기, 객체 질의기, 객체 추출기와 데이터베이스 연산전, 후의 데이터 일관성 유지를 위한 객체 관리기를 구현한다. 향후에는 제안된 시스템을 기반으로 내용 기반 질의 처리 및 웹 연동 통합 관리 시스템의 개발이 요구된다.

• Annual Conference of KIPS
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• 2013.05a
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• pp.865-866
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• 2013

다양한 웹 사이트에서 '맛집' 어플의 제공은 다양하게 제공하고 있다. 본 연구도 기존의 제공 서비스와 유사한 기능을 사용하고 있지만, 차이점은 사용자의 의사결정에 효율적으로 도움을 주기 위해 맛집 방문 이력 정보를 이용한 개인 맞춤형 음식점을 추천하는 어플리케이션을 설계한다. 이는 기존의 '맛집' 정보 제공과 방문한 이력에 따른 '맛집' 추천 정보를 제공하는 어플리케이션이다. 사용자는 현재 위치에 따라 과거 방문기록을 등록한 인근 '맛집' 방문 빈도와 방문 순서를 분석하여 현재 위치에서 개인별 맞춤 음식점을 추천받을 수 있다.

• Journal of KIISE:Software and Applications
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• v.34 no.1
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• pp.30-39
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• 2007

The existing content-based spam mail filtering algorithms have difficulties in filtering spam mails when e-mails contain images but little text. In this thesis we propose an efficient spam mail classification algorithm that utilizes the link structure of e-mails. We compute the number of hyperlinks in an e-mail and the in-link frequencies of the web pages hyperlinked in the e-mail. Using these two features we classify spam mails and legitimate mails based on the decision tree trained for spam mail classification. We also suggest a hybrid system combining three different algorithms by majority voting: the link structure analysis algorithm, a modified link structure analysis algorithm, in which only the host part of the hyperlinked pages of an e-mail is used for link structure analysis, and the content-based method using SVM (support vector machines). The experimental results show that the link structure analysis algorithm slightly outperforms the existing content-based method with the accuracy of 94.8%. Moreover, the hybrid system achieves the accuracy of 97.0%, which is a significant performance improvement over the existing method.

• Journal of The Korean Association of Information Education
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• v.9 no.2
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• pp.221-228
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• 2005

The art appreciation education is emphasized to develope independent thought and upright value decision in the flood of various image medium. A experience of beauty and a express part related with the sentimental field is focused on directing in the seventh arts curriculum, too. Although the art appreciation education is emphasized, just expressive and functional art texture is still taught in the education spot up to now. Also a appreciative activity is limited simply to describe own feeling intuitionally ; time shortage, difficulty of analysis product, difficulty of guiding appreciation. In this paper I refer that analyze figurative factors of a art product, modify it by applying other program, compare with it and then I develope web base art appreciation system and apply it. As a result I get educational effect. When checking line, form, light and darkness, color, feeling, space and composition of external some factors in a product, formative sense and analytical appreciation is improved.

• Journal of KIISE:Software and Applications
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• v.37 no.3
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• pp.222-232
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• 2010

The purpose of this investigation was to help university professors for making their systematic design of instruction easily and scientifically. To increase of learner's studying ability, the systemic instructional design is imperative. But most of university professors could not get proper experiences to know develop instructional design system, specially to develop web-based system. This new system made it possible to select the proper instructional methods and the media type suitable for the corresponding data. And also every professor who is involved to know this system, can put informations for the target learners, learning contents and learning objectives, and present the proper media types and the many different conditions in the process of the each instructional design process. Finally, the results of the learner's study will be effective and professors showed their positive opinions for the using of the system.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.785-790
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• 2009

Widgets are the instrument for representing user's character and embossing the value of blogs. The compound word of the Windows and Gadget the application, widgets are the functional program to displayed on the screen graphical user interface (GUI) tools as a kind of service that user want to see. On the operating system, the Web, and mobile area, widgets offer the delivery of information, convenience and efficiency. However widgets have been never gave satisfaction to user because it focused transmitting information and representing circumstance than fun. This study is for recognized fun elements that user feel interest and categorized fun elements each type of widgets. Fun elements of widget never been defined, we use fun elements on design and product area and emotional word that is representative of affectivity. And we make up an online questionnaire to blog users. The widget selected by popular degree among the domestic widgets and the Japanese widget. And the results of the questionnaire that 5-scales used based on user preferences to identify the elements that are fun.

• Journal of KIISE:Software and Applications
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• v.36 no.7
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• pp.580-589
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• 2009

Today, most web pages are being created in the blogspace or evolving into the blogspace. A blog entry (blog page) includes non-traditional features of Web pages, such as trackback links, bloggers' authority, tags, and comments. Thus, the traditional rank algorithms are not proper to evaluate blog entries because those algorithms do not consider the blog specific features. In this paper, a new algorithm called "Blog-Rank" is proposed. This algorithm ranks blog entries by calculating bloggers' reputation scores, trackback scores, and comment scores based on the features of the blog entries. This algorithm is also applied to searching for information related to the users' queries in the blogspace. The experiment shows that it finds the much more relevant information than the traditional ranking algorithms.

• Journal of the Korea Society for Simulation
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• v.26 no.2
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• pp.9-17
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• 2017

The problem of social phenomenon is getting more complicated than past decades, and the simulation engineers need more computation power to solve the problem. Therefore, the needs of the computational resources of the modeling and simulation environment are increasing. In the perspective of the simulation, it is necessary to allocate computational resources flexibly so that the simulation can be performed per the available budget range. As an alternative to the simulation environment to accommodate these requirements, cloud service has emerged as an environment in which computing resources can be used flexibly. This paper proposes a web-based simulation framework which consists of a front-end that reconstructs the simulation model using the web, and a back-end that executes the discrete event simulation. This paper also carried out a case study which shows web-based simulation framework has better overall runtime than standalone simulation framework.

• Journal of Korea Society of Industrial Information Systems
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• v.20 no.2
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• pp.113-124
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• 2015

Unlike structured data which are gathered and saved in a predefined structure, unstructured text data which are mostly written in natural language have larger applications recently due to the emergence of web 2.0. Text mining is one of the most important big data analysis techniques that extracts meaningful information in the text because it has not only increased in the amount of text data but also human being's emotion is expressed directly. In this study, we used R program, an open source software for statistical analysis, and studied algorithm implementation to conduct analyses (such as Frequency Analysis, Cluster Analysis, Word Cloud, Social Network Analysis). Especially, to focus on our research scope, we used keyword extract method based on a Data Dictionary. By applying in real cases, we could find that R is very useful as a statistical analysis software working on variety of OS and with other languages interface.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04c
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• pp.1-3
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• 2003

웹 기반의 응용시스템 개발이 보편화되면서 보안은 특히 인터넷과 같은 네트워크 환경에서 정보처리에서 매우 중요한 요소로 대두되고 있다. 공통평가기준은 보안을 중요시하는 시스템의 명가를 위해서 표준화된 요구사항들의 목록이다. 공통평가기준을 사용하여 시스템 자체와 시스템 개발에 않은 보안 요구사항 정의는 가능하지만, 방법론 지원은 제공하지 않는다. 본 논문에서는 보안 클래스를 중심으로 소프트웨어공학 생명주기에서 보안측면을 분석하고 적용하는 방법을 제시한다. 공통평가기준에서의 행위와 문서는 개발된 시스템의 품질을 개선하여. 높은 보안 요구사항을 만족하기 위해 부가적 비용과 노력을 감소시키는 시스템 개발에서 가장 중요한 요소이다 이를 기반하여 프로세스, 자원. 생명주기 분석 모델과 프레임워크를 정의하고 생명주기 지원 클래스의 적용에 대해서 논한다.