• Journal of Satellite, Information and Communications
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• 제7권1호
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• pp.116-121
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• 2012

For the purpose of drawing out the technological criteria for the development of an Low Earth Orbit Meteorological Satellite some characteristics of infrared and microwave sensors on the payload were analysed by approaching theoretically. In addition, the channel requirements and interface requirements of the microwave sensors equipped on the payloads of the existing foreign Low Earth Orbit Meteorological Satellites were analysed with respect to the development of an Earth Orbit Meteorological Satellite payload. In this paper, the multipurpose satellite bus and the CAS 500 platform as the interface requirements of an Low Earth Orbit Meteorological Satellite, and core subsystem and principle functional requirements of a satellite control system were systematically described.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제8권5호
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• pp.968-972
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• 2007

The importance of bumper system lies not only in the styling of vehicles, but also in the protection of vehicles and pedestrians from reasonable impact. In this study, we proceed to search a method for efficient bumper system without using the impact test and the computer simulation to analyze the bumper system. In the process of the research, we proposed the each method that is used to search the shape that satisfy each regulations in first, because bumper's dimensions to satisfy 'vehicle protection' regulations and form's dimensions to satisfy ‘pedestrian protection' regulations are difficult to exist together. After that we proposed the calculate method and design algorithm that is used to search a reasonable point satisfying the two regulations together.

• Journal of Internet Computing and Services
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• 제5권2호
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• pp.85-95
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• 2004

The web-based project is seriously not efficient area at software engineering. In order to develop a web-based system, UI(User Interface) designers usually first design display layout and then business logic developers bring to complete the coding of the display layout source. In the case of maintenance, it goes through the same process, This kinds of web-based software development method were proposed by the various methods same as the tag library of JSP, But there are many problems to apply them and they are low productive comparing to the CIS based software development method, WFS(Neb Form System), which is suggested on this thesis, separates UI design from business logic on a web project and offers the better environment to develop web based software, Eventually WFS will improve the productivity to develop web based software.

• Composites Research
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• 제32권2호
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• pp.90-95
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• 2019

Sloshing impact loads on liquefied natural gas (LNG) carr iers are the main issue of damage to the insulation system in LNG cargo containment system (LNG CCS). The damage to the insulation system would be fatal in maintaining a temperature-savings environment in LNG CCS. The typical method is to enhance the insulation materials that can maintain a constant cryogenic temperature. Insulation materials consist of polyurethane foam and plywood, an adhesive for bonding these two materials. This study intends to improve the absorption energy of the material when the impact load is applied by creating a glass bubble/epoxy composite resin as part of the insulation. The experimental scenarios consider the effect of temperature ($20^{\circ}C$, $-163^{\circ}C$), glass bubble weight fraction in epoxy resin through free fall experiments. Experiments have shown that if the glass bubble additive reaches 20 wt.%, the cryogenic absorption energy is a maximum performance and that 0 wt.% has a maximum ambient absorption energy. However, the agglomeration has been occurred due to deterioration of the stirring performance if weight fraction was 20 wt.% and the result of 0 wt.% have been revealed that ambient absorption energy is significantly lower.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 1999년도 가을 학술발표논문집 Vol.26 No.2 (2)
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• pp.268-270
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• 1999

HyTime(Hypermedia/Time-Based Structuring Language)는 SGML 문서에 하이퍼미디어를 포함하는 기능으로 확장하고, 하이퍼미디어의 논리 구조를 기술하기 위한 언어로 1992년 4월에 국제표준으로 채택되었다. 기존의 문서들은 각기 다른 플렛폼마다 그들만의 문서포맷이 정해져 있는 이유로 상이한 플랫폼에서도 문서를 서로 교환할 수 있도록 하기 위한 SGML 표준을 채택하게 되었다. SGML 환경하에서 많은 문서들은 하이퍼링크와 멀티미디어 정보를 포함하는 문서로 발전하게 된다. 하이퍼미디어문서의 처리를 위한 표준으로 HyTime이 정의되고 많은 어플리케이션들이 이를 적용하고 있으며 하이퍼문서로의 확장을 위한 HyTime 엔진이 요구된다. 이에 본 논문에서는 하이퍼미디어 문서 시스템을 구현하기 위한 필수 요소인 HyTime 엔진의 설계와 HyTime 엔진의 처리 절차에 관해 연구하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 한국경영과학회 2000년도 추계학술대회 및 정기총회
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• pp.219-222
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• 2000

Systematic management of data related to business process, and information exchange within existing information systems or between different companies have recently become an important issue. This paper tries to solve such problems by using form based workflow system using XML(extensible Markup Language), a standard for digital document exchange. In this system, a new model that formalizes documents into XML form documents and manages them is developed. By defining and operating form documents by XML, information exchange within existing information systems such as ERP and SCM or between different companies, and interoperability between different WFMS can be easily achieved. In addition, by matching form, a formalized document, with existing database schema, WFMS can be directly applied to existing information system, thus enabling continuity of data management and business activity.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (C)
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• pp.458-461
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• 2006

웹 플렛폼이 계속해서 발전하고 기술이 고도화 됨에 따라 이를 사용하기 위한 다양한 지원 기술과 프레임워크가 제안되고 있다. 그 중 최근 가장 관심이 집중되고 있는 브라우저 기반의 웹 어플리케이션 기법이 AJAX(Asynchronous JavaScript and XML)이다. AJAX를 구현하는 데에는 JavaScript가 중요한 기술적 요소라 하겠다. 본 논문에서는 사용 규모와 기능의 확대가 예상되는 JavaScript의 시험을 위한 도구를 개념적으로 제안했다. 기존에 제안된 도구나 수동적인 시험은 HTML에 시험을 위한 JavaScript를 삽입하여 브라우저를 통한 시험이 위주였다. 브라우저를 통한 방법은 스크립트를 삽입한 후 HTML을 불러와야 한다는 번거로움이 있고 시험을 위해 삽입된 JavaScript를 제거하는 과정에서 다른 오류가 유입될 수도 있다. 또한 브라우저에서 보여주는 결과만으로는 시험의 확인이 어렵다. 이에 본 논문은 AJAX 환경에서 더욱 사용이 확대되고 있는 자바스크립트를 시험하기 위한 자동 시험 도구 시스템을 제안한다.

• Journal of the Korean Society for Precision Engineering
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• 제17권9호
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• pp.109-121
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• 2000

A simplified modeling approach of free vibration for occupied car seats was demonstrated to be feasible. The model consisting of interconnected masses springs and dampers was initially broken down into subsystems and experiments conducted to determine approximate values for model parameters. Which were each stiffness and damping value. Nonlinear equations of motion were derived and model parameters obtained in experiments were applied to these equations. A mathematical model of free vibration for car seat and mannequin system was built with 7 degrees of freedom. in order to calculate natural frequencies and the corresponding mode shapes. linear equations of motion were obtained through linearization. In order to explore the effects of each model parameter free vibration analysis were preformed.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2002년도 가을 학술발표논문집 Vol.29 No.2 (2)
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• pp.643-645
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• 2002

자바가상기계는 클래스 파일에 있는 클래스, 상수, 필드, 메소드 등의 내부 정보를 읽고 자바 응용 프로그램을 실행한다. 보조기억장치가 없는 내장형 시스템의 경우 클래스 파일은 주기억장치, 즉 메모리에 두어야 하지만 클래스 파일 자체는 크기도 클 뿐 아니라 내부 정보에 접근하는 것도 효율적이지 못하다. 따라서 대개의 경우 클래스 파일을 변형한 형태로 메모리에 배치하는데, 본 논문에서는 특히 simpleRTJ 라고 하는 상용 내장형 자바가상기계에서 적용된 방식에 대해 조사해보았다. 이 플렛폼에서의 분석을 통해 클래스 파일의 크기가 얼마까지 줄어들 수 있고, 내부 정보에 대해서는 얼마나 효율적으로 접근할 수 있는지에 대해 고찰하였으며, 그 결과를 바탕으로 향후 더 개선된 형태로 클래스 파일을 메모리에 배치할 수 있는 방안에 대해 연구하고자 한다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 한국건축시공학회 2005년도 추계 학술논문 발표대회
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• pp.111-116
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• 2005

The formwork is very important in terms of time and cost of construction project. There have been ample research efforts regarding to technical issues such as types, specifications, and productivities. However, no previous research has addressed managerial requirements of the formwork. Thus, this paper investigated the present status of form work analyzing a case-study company, and derived an improvement plan for the formwork. The findings includes 1) the needs for increasing use of system forms in order to improve the quality and the safety and 2) further development of management system of formwork in order to enhance the efficiency.