• Proceedings of the Korea Society for Industrial Systems Conference
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• 2002.06a
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• pp.185-189
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• 2002

When we are teaching the programming education, it is very useful if we show that a flow chart generate automatically owing to a written out of the program. In this paper, we introduce the method of a flow chart generating from the simple imperative language for the While program. After the While program is translated by the Flow Chart Language program, it is generated automatically by making use of the java graphic library. Taking advantage of our results of the study, beginners can understand the flow of the program easily.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.337-339
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• 2002

휴대용 무선기기의 성능 향상과 동적인 응용프로그램 실행의 필요성에 따라 모바일 응용프로그램은 기존의 네이티브 애플리케이션 제작 방법에서 가상기계(Virtual Machine)를 탑재하여 실행하는 가상기계애플리케이션 제작 방법으로 변환하였다. 가상기계를 이용한 애플리케이션의 실행은 플랫폼 독립적인 실행이 가능하며 또한 효과적인 다운로드 솔루션을 통한 동적인 응용프로그램의 실행이 가능하다. 이러한 배경으로 KVM과 CVM(General Virtual Machine)등의 가상기계가 출현하였다. 그러나 각 플랫폼에서 맞는 애플리케이션은 서로 호환되지 않으므로 가상기계 언어간의 번역을 통해 목적 가상기계에서의 실행이 요구되며 자바 바이트코드를 순수 국내 기술로 개발된 GVM 코드로 번역하는 것이 바람직하다. 본 논문에서는 KVM에서 실행가능한 자바 바이트코드를 CVM에서 실행하기 위해 바이트코드를 GVM코드인 SAL(Sinji Assembly Language)로 번역하는 번역기를 설계하고 구현한다. 이를 위해 자바의 언어 독립적 특성 외에 언어 의존적인 특성을 처리하기 위한 방법을 제안하며 언어 의존적인 특성을 배열과 문자열, 클래스와 객체, 예외, 스레드로 분류하여 처리한다.

• Annual Conference on Human and Language Technology
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• 2009.10a
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• pp.126-129
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• 2009

YKanto (Ontology Construction System of Yeungnam University & KAIST)[1,2]는 웹 기반 온톨로지 구축 시스템으로써 다수의 온톨로지 구축자가 신문, 사전, 코퍼스 등의 지식 자원으로부터 대용량의 온톨로지를 구축하고 관리할 수 있는 환경을 제공한다. 본 논문에서는 YKanto에서 개발 중인 온톨로지를 2차원 그래프로 시각화 할 수 있는 온톨로지 시각화 도구(Visualization Tool for Ontology)를 설계하고 개발한다. 개발한 온톨로지 시각화 도구는 기존의 개념 및 관계 중심의 시각화 도구와 달리 사건 기반의 온톨로지(event-based ontology)의 가독성을 높이기 위한 사건(event) 중심의 시각화 도구이다. 또한, Java Applet으로 구현하며, YKanto과 연동시킴으로써 개발 중인 온톨로지를 웹 상에서 실시간으로 확인할 수 있도록 한다.

• Proceedings of the IEEK Conference
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• 2000.07b
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• pp.699-702
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• 2000

The Internet has become widely used in many countries. In particular, a new emerging technology, the WWW (World Wide Web), which has become a major application of the Internet, has been rapidly developed. As a result, there are hundreds of millions of URLs (Uniform Resource Locators) on the WWW, and the total number of URLs is still explosively increasing. To get information from the WWW, we generally use Internet search engines. However, we cannot always get the actual information we want. Accordingly, we have solved this problem by constructing a prototype system based on agents by programming language Java for constructing a more effective search engine. This so-called “intelligent agent system on WWW” deletes redundant HTML (Hyper Text Markup Language) files and exchanges information about the existence of URLs. And we found that our prototype system is more powerful and effective than conventional search engines.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.659-662
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• 2005

XML is standard of web document, and is used in language for document data exchange. XML document is used as example that change existing document to XML or makes new document by XML increases and XML search system to search XML document efficiently accordingly is requiring. This paper describes design and implementation of query processing system for translating XML elements and data between XML documents and relational database and consist of XML to DB processor, DB to XML processor and XML document management processor. Through this, described for design and embodiment of efficient XML document search system of JAVA base using XQL that is proposed in language of quality of XML document.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.12a
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• pp.324-329
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• 2003

Single Sign-On(SSO)은 사용자가 단 한번의 인증으로 분산된 시스템에서 제공하는 다른 서비스에 로그인하는 것을 가능하게 하는 보안 특징이다. SAML은 서로 다른 entity들 사이에서 인증, 권한 그리고 profile 정보의 교환을 가능하게 하는 XML기반의 SSO표준이다. 이러한 표준은 분산 환경에서 서로 다른 보안 서비스들 사이에 상호운용성을 제공한다. 본 논문에서는 SAML APIs로 구성된 자바 기반의 SSO library를 설계 및 구현하고 SAML APIs를 검증하기 위해 분산 application의 prototype을 구성하였다. 개발된 library에서 무결성, 부인방지, 그리고 기밀성 같은 보안고려사항들을 XML기반의 서명과 암호화를 적용하여 보장한다.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2678-2680
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• 2001

We develop a total solution system for applications, which is called a data processing module system(DPMS), based on ASP, PDF, JAVA, and MSSQL. The DPMS system provides a realtime telematic guidance in the fields of application, recruiting, and management. The user documents the PDF file on the Web browser and store the file in DB for correction. The DPMS discovered the difficulties in data input due to 2 byte problem of Korean language. This result leads to the usage of Korean language as well as others. Test results through free-charge access confirm that the DPMS outperforms the conventional systems based on ASP with HTML in view of simplicity and confidentiality.

• Journal of Internet Computing and Services
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• v.16 no.4
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• pp.61-70
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• 2015

This paper presents a web-based Java applet for understanding the concepts in digital logic circuits and student satisfaction survey was carried out in order to show its educational validity. Through our educational Java applet, the learners will be capable of learning the concepts and principles related to digital logic circuit experiments and how to operate virtual experimental equipments and virtual bread board. The proposed educational Java applet is composed of five important components: Principle Classroom to explain the concepts and principles for digital logic circuit operations, Simulation Classroom to provide a web-based simulator to the learners, Virtual Experiment Classroom to provide interactive Java applet about the syllabus of off-line laboratory class, Assessment Classroom, and Management System. With the aid of the Management System every classroom is organically tied together collaborating to achieve maximum learning efficiency. Finally, we have obtained several affirmative effects such as high learning standard, reducing the total experimental hours and the damage rate for experimental equipments.

• KIPS Transactions on Software and Data Engineering
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• v.7 no.8
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• pp.287-296
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• 2018

In the recent commercial DBMS market, as the users' burden and complaint which are related to high price licensing policy and late technical support service are increasingly rising, the concern for use of open source DBMS which has no problem with compatibility or stability is escalating. Due to the fact, the cases saving the cost are growing by converting Oracle Corporation's applications, which has about 60% share in the DBMS market, to an open source DBMS. However, in converting non-interchange sentences to an ANSI standard-based open source DBMS because of the use of PL/SQL in Oracle Corporation provides, a lot of manual work accompanies, so there is a lot of loss of time and money. Therefore, a tool that automatically converts PL/SQL to standard SQL is required. The proposed automation tool for the conversion of applications converts PL/SQL to Java Stored Procedure, an open source DBMS-based ANSI standard programming language. Through carrying out a test on the automation tool, it is proved that the tool will contribute to shortening time and saving cost by verifying the identity of input-output data and its reliability after correcting errors in converting to Java Stored Procedure.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.21 no.1
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• pp.81-87
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• 2003

It is very difficult assignment that grasp three-dimensional real life in Web base network environment. But, the recent simulation tools embody third dimension elements within 2 dimensions screen that is limited through third dimension implementation technology. Many GIS tools are offering excellent functions for third dimension data creation. But, research about design of third dimension GIS that use virtual reality technique in Web environment is status that is unprepared. So, in this research embodied third dimension topography map using virtual reality modelling language to produce active third dimension VR map that can supply visual information for direction, visual point that want in World Wide Web without support of expensive Map exclusive use program. And these 3D Web-Map is thought that possibility is enough as next generation map medium.