• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.7
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• pp.1575-1584
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• 2009

Improvement of service quality and to be caused by with high re-use result expandability, the importance of SOA softwares to be coming to be high recently, according to the [thu] your (Gartner) group from 2006 until 2011 CAGR (yearly average complex growth rate: Compound it is a tendency where in Annual Growth Rate) these 35% the domestic and foreign SOA software markets are increasing suddenly at this degree. It follows hereupon and in about quality rating of SOA softwares the demand is augmented in about development of the quality rating method which it follows international standard. In order to evaluate the use characteristic quality of SOA softwares a quality and about the use frost requirement from the research which it sees and escape with the scale box it examined it measured and in about the method which it decides and an evaluation instance a research the result according to the standard which is appropriate it accomplished it presented. The research which it sees it leads and it induces strategic engineering development it leads and with the fact that it will be the possibility of raising an objectivity and an application degree it expects the use characteristic quality increase of SOA softwares.

• 한국정보교육학회:학술대회논문집
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• 2006.01a
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• pp.249-254
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• 2006

본 연구는 초등학교 컴퓨터 교과의 제재를 주제로 한 웹 기반 프로젝트 학습을 설계하는데 목적이 있다. 이에 따라 본 연구에서는 프로젝트 학습과 웹 기반 프로젝트 학습에 대한 제이론을 고찰하고 이를 바탕으로 웹 기반 프로젝트 학습 모형을 설계하여 초등학교 컴퓨터 교과의 주제를 중심으로 웹 기반 프로젝트 학습을 설계하였다. 설계 단원은 초등학교 6학년 컴퓨터 교과(재량교과)의 '정보의 이해와 윤리', '컴퓨터 기초', '소프트웨어의 활용' 영역을 예비 학습으로 학습하고, 주제별로 그룹별 프로젝트 활동을 함으로써 학습자 중심의 학습이 가능하도록 하였다.

• IE interfaces
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• v.11 no.3
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• pp.227-240
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• 1998

This article presents a model for Intelligent Groupware Systems(IGS). The model is concerned not just with a future framework, but attempts to integrate many technologies into the framework. In order to do so, first of all it identifies essential technologies to improve the performance of the components in the model in terms of task-independent technologies(TIT) and task-dependent technologies(TDT). The former mainly consists of current technologies, which is under progress, being able to affect the groupware performance greatly. On the other hand, the latter is closely related to the knowledge depending on application systems. Fianlly, it presents these potential technologies which will be required for the IGS.

• Journal of Scientific & Technological Knowledge Infrastructure
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• s.8
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• pp.61-70
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• 2002

그리드는 일정한 네트워크 성능이 필요한데, 현재 운영중인 네트워크들은 인프라스트럭춰 및 미들웨어 측면에서 만족될 수 없으며, 기존의 다른 그룹의 노력에 의해 우연히 해결되는 것이 아니고 그리드를 위한 네트워킹이라는 목표를 가지고 지속적인 노력이 필요한 것이다. 본고에서는 고성능네트워킹 구축 및 기술 현황과 발전방향, 그리고 GHPN 연구 활동과 GHPN 연계 가능한 고성능 글로벌 연구망 추진현황 및 계획 등을 분석 검토하여, 향후 활발히 연구가 진행될 GHPN의 활동범위와 발전 방향을 생각해 볼 수 있도록 한다.

• Information and Communications Magazine
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• v.20 no.8
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• pp.100-112
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• 2003

Access Grid(AG)는 분산되어 있는 컴퓨터들을 네트워크로 연결해 슈퍼컴퓨터처럼 사용할 수 있는 Grid망을 이용해, 기존 화상회의 시스템과는 달리 원거리 사용자들에게 실재감 있는 그룹간 협업 환경을 제공한다. 본 논문에서는 AG에 대한 개념 및 관련 연구에 대한 연계성을 소개하며, AG 노드를 구축하기 위한 장비와 소프트웨어의 구성·설치 및 활용 방안을 구체적으로 제시한다. 또한 국내외 AG의 현황 및 향후 발전 방향에 대한 논의를 덧붙여, 국내 AG 활동의 활성화를 촉진하고자 한다.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.389-389
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• 2010

우리 연구그룹에서는 분자 소자에서의 소자 구조와 전도도 간의 상관관계를 알아보기 위해서 분자동역학 전산모사와 전자밀도범함수이론 계산 및 전하수송성 계산을 자동으로 수행할 수 있는 소프트웨어를 개발하고 이를 적용해 다양한 나노소자를 연구하고 있다. 본 발표에서는 hexanedithiolate 단일 분자가 Au(111) 전극 사이에서 다양한 S-Au 접점 구조를 가지고 구성된 소자 모델에서 열적 진동이 소자 전도도에 끼치는 효과를 통계적으로 분석하여 단분자 소자 실험에서 제기된 여러 개의 conductance peak의 측정에 대한 논란에 대해 이론적인 규명을 시도할 것이다.

• Journal of KIISE:Databases
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• v.31 no.5
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• pp.516-526
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• 2004

Main-Memory DataBase(MMDB) system where all the data reside on the main memory shows tremendous performance boost since it does not need any disk access during the transaction processing. Since MMDB still needs disk logging for transaction commit, it has become another bottleneck for the transaction throughput and the commit protocol should be examined carefully. There have been several attempts to reduce the logging overhead. The pre-commit and group commit are two well known techniques which do not require additional hardware. However, there has not been any research to analyze their effect on MMDB system. In this paper, we identify the possibility of deadlock resulting from the group commit and propose the disk group commit protocol which can be readily deployed. Using extensive simulation, we have shown that the group commit is effective on improving the MMDB transaction performance and the proposed disk group commit almost always outperform carefully tuned group commit. Also, we note that the pre-commit does not have any effect when used alone but shows some improvement if used in conjunction with the group commit.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.6
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• pp.1235-1242
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• 2019

While several machine learning technique has been implemented for Android malware categorization, there is still difficulty in analyzing due to overfitting problem and including of un-executable code, etc. In this paper, we introduce our implemented tool to address these problems. Tool is consists of approximately 1,500 lines of Java code, and perform Flow analysis on set of APIs, or on control flow graph. Our tool groups all the API by its relationship and only perform analysis on actually executing code. Using our tool, we grouped 39032 APIs into 4972 groups, and 12123 groups with result of including class names. We collected 7,000 APKs from 7 families and evaluated our feature reduction technique, and we also reduced features again with selecting APIs that have frequency more than 20%. We finally reduced features to 263-numbers of feature for our collected APKs.

• Journal of the Korea Society of Computer and Information
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• v.27 no.9
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• pp.253-265
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• 2022

The purpose of this study is to make recommendations for developing a Metaverse platform for educational purpose by utilizing focus group interviews with elementary, middle, and high school teachers having experience on metaverse in teaching. 10 teachers participated in the study, and data was collected for two months from January to February in 2022, and two focus groups were formed and interviewed. Data was analyzed by applying content analysis. The results showed that there were 17 sub-themes derived from 6 main guiding questions(What are the advantages of using Metaverse platform in education? What are the advantages of utilizing Metaverse as one of educational software? What are the possible and appropriate classes utilizing Metaverse in future education? What are the possible problems when using Metaverse in education? What are the essential functions which Metaverse should have in education? and Could you provide us with policy recommendations in building Metaverse platform for educational purpose?). Finally, based on the results, recommendations for building Metaverse platform for educational purpose are suggested and limitations of the study and possible future study are discussed.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.3
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• pp.452-460
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• 2008

ALE-complient RFID middleware system receives EPC code data from reader devices and converts the data into URN format data internally. After filtering and grouping, the system sends the resulting URN code to application and(or) users. Meanwhile, not only the types of EPC code are very diverse, but also another new kinds of EPC code can be emerged in the future. Therefore, a method to process all kinds of EPC code effectively is required by RFID middleware. In this paper, a method to process various kinds of EPC code acquired from RFID reader devices in ALE-complient RFID middleware is proposed. Especially, we propose an approach using ontology technology to process not only existing EPC code but also newly defined code in the future. That is, we build an ontology of conversion rules for each EPC data type to effectively convert EPC data into URL format data. In this case, we can easily extend RFID middleware to process a new EPC code data by adding a conversion rule ontology for the code.