• 대한조선학회논문집
• /
• 제51권1호
• /
• pp.51-57
• /
• 2014

In the KIOST MOERI model ice basin, a lot of experiments to find the material properties of model ice and model ship tests are being performed. And therefore many data information was produced, yet it was saved as excel data format. In order to manage and use the data more effectively and systematically, a proper database management is required. To make realistic engineering DBMS(database management system), understanding of test process, the usage of data, design of data schema and computer language and system management are required. In this paper, basic design process and usage of DBMS based on network and multiple user concept is introduced.

• 통상정보연구
• /
• 제6권1호
• /
• pp.249-265
• /
• 2004

In the current digital age, most of the countries in the world recognize the electronic business to be a very prospective area in the future and plan to activate for the preoccupation of the business. As a result, this led a rapid increase of the electronic business volume. Electronic business takes place in the cyber space, using internet. However, the intellectual property rights have a high degree of possibility of being infringed as the digitalized intellectual property is easy to receive, copy and transmit in the cyber space. The language structure on the web, represented by HTML, makes easier to copy the intellectual property. And, as the internet has no national boundary, the infringement of the intellectual property rights is easier regardless of country, which could lead to the commercial disputes between the concerned countries. There are in fact many legal disputes nowadays on the infringement of the intellectual property rights in such field as computer programming, infringement of the copyright, business model patent and infringement of the trademark right on the registered name of the domain. It is, therefore, time now to prepare a new theory or legal system to protect the intellectual property rights on copyright, patent and trademark right so as to comply with the digital environment together with such a splendid growth of "electronic business." USA and Germany are nowadays making a significant movement on the legislation of the electronic business, and this study will focus on the legislative contents, judicial precedents and interpretation of law in the above countries.

• 디지털콘텐츠학회 논문지
• /
• 제10권2호
• /
• pp.367-373
• /
• 2009

컴퓨터 프로그래밍 교육에서는 추상적 개념을 이해하고 주어진 문제를 스스로 해결하도록 한다. 기존의 프로그래밍 교육에서 BASIC, C와 같은 절차적 프로그래밍 언어에 대한 연구는 많이 있지만 JAVA와 같은 객체지향 프로그래밍 언어를 통한 교육콘텐츠는 찾아보기 힘들다. 본 논문에서는 구조 중립적이며, 분산 인터넷 환경에 적합한 특성을 가지고 있는 객체지향 프로그래밍(OOP)/JAVA 학습 시스템을 개발하여, 초등학교 학생들로 하여금 활용하도록 하였다. OOP/JAVA 학습 시스템을 통한 객체지향 프로그래밍 교육은 초등학생들의 논리적 사고력을 향상시키고, 수학, 과학 과목의 학습 성취도에 긍정적인 영향을 주는 동시에 컴퓨터에 대한 흥미도가 상승함을 실험을 통해 확인할 수 있었다.

• Structural Engineering and Mechanics
• /
• 제33권4호
• /
• pp.407-428
• /
• 2009

The effects of the uniform and spatially varying ground motions on the stochastic response of fluid-structure interaction system during an earthquake are investigated by using the displacement based fluid finite elements in this paper. For this purpose, variable-number-nodes two-dimensional fluid finite elements based on the Lagrangian approach is programmed in FORTRAN language and incorporated into a general-purpose computer program SVEM, which is used for stochastic dynamic analysis of solid systems under spatially varying earthquake ground motion. The spatially varying earthquake ground motion model includes wave-passage, incoherence and site-response effects. The effect of the wave-passage is considered by using various wave velocities. The incoherence effect is examined by considering the Harichandran-Vanmarcke and Luco-Wong coherency models. Homogeneous medium and firm soil types are selected for considering the site-response effect where the foundation supports are constructed. A concrete gravity dam is selected for numerical example. The S16E component recorded at Pacoima dam during the San Fernando Earthquake in 1971 is used as a ground motion. Three different analysis cases are considered for spatially varying ground motion. Displacements, stresses and hydrodynamic pressures occurring on the upstream face of the dam are calculated for each case and compare with those of uniform ground motion. It is concluded that spatially varying earthquake ground motions have important effects on the stochastic response of fluid-structure interaction systems.

• 한국산업정보학회논문지
• /
• 제13권3호
• /
• pp.31-37
• /
• 2008

MPEG 4 Part 20 LASeR (ISO/IEC 14496 20) is a specification designed to deliver rich media services in a mobile environment. The specification is an emerging standard that can replace the MPEG 4 BIFS specification designed to deliver PC based heavyweight media contents. The specification describes the representation of scene information in a resource constrained mobile environment. Unlike the BIFS standard designed to deliver heavyweight rich media, the LASeR specification has a restricted description that conforms to the SVG Tiny 1.2 specification. Also, the specification has an advantage of allowing for the efficient conversion of one graphics format to another. In this paper, we present the design and the implementation of a LASeR authoring system that allows for fast and efficient creation of interactive rich media contents in a mobile environment. The Gill interface of the authoring system presented in this paper allows users, who do not have prior knowledge of the scene description language, to conveniently create contents and store the produced scenes using the internal list data structure. The system allows users to navigate scene objects internally stored and to create LASeR XML files in the structured XML format.

• 대한전기학회논문지:시스템및제어부문D
• /
• 제54권9호
• /
• pp.531-538
• /
• 2005

This paper proposes an expert system which is able to enhance the accuracy and productivity by determining the test strategy based on heuristic rules for test of the hybrid electronic circuit board producted massively in production line. The test heuristic rules are obtained from test system designer, test experts and experimental results. The guarding method separating the tested device with circumference circuit of the device is adopted to enhance the accuracy of measurements in the test of analog devices. This guarding method can reduce the error occurring due to the voltage drop in both the signal input line and the measuring line by utilizing heuristic rules considering the device impedance and the parallel impedance. Also, PSA(Parallel Signature Analysis) technique Is applied for test of the digital devices and circuits. In the PSA technique, the real-time test of the high integrated device is possible by minimizing the test time forcing n bit output stream from the tested device to LFSR continuously. It is implemented in Visual C++ computer language for the purpose of the implementation of the inference engine using the dynamic memory allocation technique, the interface with the electronic circuit database and the hardware direct control. Finally, the effectiveness of the builded expert system is proved by simulating the several faults occurring in the mounting process the electronic devices to the surface of PCB for a typical hybrid electronic board and by identifying the results.

• 대한전기학회논문지:전력기술부문A
• /
• 제48권11호
• /
• pp.1457-1463
• /
• 1999

This paper develops an real-time expert system for the electronic interlocking system. it obtains the higher safety by determining the railway interlocking strategy in order to prevent trains from colliding, and derailing in the viewpoint of veteran expert, considering the situation of station in real-time. The expert system determines the real-time interlocking strategy by confirming the interlocking relationships among signal facilities based on the interlocking knowledge base from input information such as signal, points, and it is implemented as the rule-based system in order to represented accurately and effectively the interlocking relationships. Especially in case of emergency the function which determines the rational route coordinating with IIKBAG on the workstation is designed in order to minimize the spreading effect. It is implemented in C computer language for the purpose of the implementation of the inference engine using the dynamic memory allocation technique, the build and interface of the station structure database. And, the validity of the built expert system is proved by simulating the diversity cases which may occur in the real system for the typical station model.

• 한국정보통신학회논문지
• /
• 제14권2호
• /
• pp.493-500
• /
• 2010

XML 웹서비스는 인터넷을 이용한 오픈 네트워크를 통해 단일 또는 다수의 비즈니스 업체 간의 기존 컴퓨터 시스템 프로그램을 결합시키는 표준화된 소프트웨어 기술로서 기업의 수익증대와 비용절감의 효과를 얻을 수 있을 것으로 기대된다. 특히 모바일 매쉬업(Mashup)을 위해서는 XML 웹서비스의 처리가 필수적이다. 본 논문에서는 WIPI 환경과 웹서비스 상에서 사용할 수 있는 XML 파서를 구현하였다. 그리고 HTTP 통신이 WIPI상에서 가능하도록 하여 XML 웹서비스의 서비스 개발에 적용함으로써 모바일 환경에서의 XML 웹서비스 인터페이스를 구현하였다. 유무선 환경에서 동시 사용가능하게 적용한 것은 어떠한 환경에서도 적용 가능한 파서임을 나타낸다. 또한 기존의 파서들과의 성능비교를 통해 제안한 파서가 속도면에서 뛰어난 점을 보여준다. 이에 대한 실제 응용으로서 WIPI용 Java언어를 기반으로 인터넷 서점에 적용하였다.

• 한국통신학회논문지
• /
• 제33권1B호
• /
• pp.25-37
• /
• 2008

네트워크 스트리밍 기술은 네트워크에서 스트리밍을 통하여 여러 가지의 애플리케이션 소프트웨어를 지원할 수 있는 서비스 방법이다. 멀티미디어 스트리밍 기술이 개발되어 광범위하게 사용되고 있지만, 소프트웨어 스트리밍 기술에 대한 연구는 활발하게 진행되지 않고 있다. 본 논문에서는, 개선된 성능을 가진 자바 언어 기반 소프트웨어 스트리밍 기술을 설계 및 구현하고, 기존 관련 시스템과 비교하고 여러 가지의 특성을 분석하고 성능 평가를 수행한다. 구현된 시스템은 윈도우 체제 이외에 다중 운영체제에서 사용될 플랫폼을 가지고 있다. 또한 클라이언트의 컴퓨터에 소프트웨어를 설치하지 않고 사용할 수 있으며, 사용자의 편리성이 극대화되는 이상적인 특징이 있다.

• 대한공간정보학회지
• /
• 제11권4호
• /
• pp.3-11
• /
• 2003

최근 수치사진측량은 사진측량의 기본원리를 이용하여, 각종 첨단 산업분야에 그 응용이 증대되고 있으며, 많은 관심과 연구가 진행되고 있는 실정이다. 본 연구에서는 수치사진측량에 의한 도로정보체계 개발을 하고자한다. 수치 사진측량에서 취득된 자료들을 객체 지향적인 언어인 Delphi를 이용하여 도로평면선형정보 (BC, EC, R, IP)와 도로종단선형정보 및 도로시설물정보를 구축하는 프로그램을 개발하였고, 개발된 프로그램은 영상자료를 많이 이용하여 기존보다 시각적인 효과를 극대화 할 수 있었다.