• 한국콘텐츠학회논문지
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• 제7권2호
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• pp.142-149
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• 2007

기존의 교육시스템에서는 멀티미디어 콘텐츠의 동기화표현이 불가능하거나 별도의 클라이언트 어플리케이션이 필요하였다. SMIL(Synchronized Multimedia Integration Language)은 멀티미디어 객체들의 시간적, 공간적 배열이 가능한 XML기반의 언어로서 웹브라우저 상에서 효과적인 멀티미디어 표현을 가능하게 한다. 기존의 웹기반 교육콘텐츠에 SMIL을 적용하게 되면 별도의 클라이언트 어플리케이션이 없이 웹브라우저만으로도 고품질의 멀티미디어 서비스가 가능하게 된다 본 논문에서는 SMIL를 적용한 멀티미디어 교육 콘텐츠 개발 방법을 제안하고, XSLT를 이용하여 SMIL 문서에서 XHTML 문서로 변환시킴으로써 별도의 플러그인이나 어플리케이션을 이용하지 않고 일반 사용자들이 쉽게 사용할 수 있는 저작툴을 설계하였다.

• International Journal of Precision Engineering and Manufacturing
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• 제6권3호
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• pp.24-28
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• 2005

Stress state of chip formation zone is one of the main problems in metal cutting mechanics. In two-dimensional case this process is usually considered as consistent shears of work material along one of several shear surfaces, separating chip from workpiece. These shear planes are assumed to be trajectories of maximum shear stress forming corresponding slip-line field. This paper suggests a new approach to the constriction of slip-line field, which implies uniform compression in chip formation zone. Based on the given model it has been found that imaginary shear line in orthogonal cutting is close to the trajectory of maximum normal stress and the problem about its determination has been considered as well. It has been shown that there is a second central slip-line field inside chip, which corresponds well to experimental data about stress distribution on tool rake face and tool-chip contact length. The suggested model would be useful in understanding mechanistic problems in machining.

• 제어로봇시스템학회논문지
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• 제12권6호
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• pp.600-607
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• 2006

For the effective operation of manufacturing system, FMS(Flexible Manufacturing System) and CIM(Computer Integrated Manufacturing) system are developed. In these systems, a machine tool is the target of integration in last 3 decades. In nowadays, the conventional concept of machine tools is changing to the autonomous manufacturing device based on knowledge-evolution through applying advanced information technology in which open architecture controller, high speed network and internet technology are contained. In this environment, a machine tool is not the target of integration but the subject of cooperation. In the future, a machine tool will be more improved in the form of a knowledge-evolution based device. In order to develop the knowledge-evolution based machine tools, this paper proposes the structure of knowledge evolution in M2M(Machine To Machine) and the scheme of a dialogue agent among agent-based modules such as a sensory module, a dialogue module, and an expert system. The dialogue agent has a role of interfacing with another machine for cooperation. To design the dialogue agent module in M2M environment, FIPA-OS and ping agent based on FIPA-OS are analyzed in this study. Through this, it is expected that the dialogue agent module can be more efficiently designed and the knowledge-evolution based machine tools can be hereafter more easily implemented.

• 한국군사과학기술학회지
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• 제17권2호
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• pp.189-196
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• 2014

Automated design program using commercial process integration and optimization program was developed for conceptual design of fighter-class aircraft. Wind tunnel test data and performance analysis results were compared for the verification of analysis tool of this program, and the usefulness of the tool was found. After integration with radar cross section analysis tool, the correlation with configuration design variables of wing, tail and performance parameters was identified by design of experiment, and the optimized configuration for weight and RCS was derived from optimization of empty weight and average frontal RCS value. After parameter definition of fuselage, the program can be implemented for full aircraft configuration.

• Journal of Information Processing Systems
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• 제17권5호
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• pp.972-988
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• 2021

At present, DevOps environments are getting popular in software organizations due to better collaboration and software productivity over traditional software process models. Software artefacts in DevOps environments are vulnerable to frequent changes at any phase of the software development life cycle that create a continuous integration continuous delivery pipeline. Therefore, software artefact traceability management is challenging in DevOps environments due to the continual artefact changes; often it makes the artefacts to be inconsistent. The existing software traceability related research shows limitations such as being limited to few types of artefacts, lack of automation and inability to cope with continuous integrations. This paper attempts to overcome those challenges by providing traceability support for heterogeneous artefacts in DevOps environments using a prototype named SAT-Analyser. The novel contribution of this work is the proposed traceability process model consists of artefact change detection, change impact analysis, and change propagation. Moreover, this tool provides multi-user accessibility and is integrated with a prominent DevOps tool stack to enable collaborations. The case study analysis has shown high accuracy in SAT-Analyser generated results and have obtained positive feedback from industry DevOps practitioners for its efficacy.

• 한국정밀공학회지
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• 제28권1호
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• pp.11-18
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• 2011

A worm screw is widely used in a geared motor unit for motion conversion from rotation to linear. For mass production of a high quality worm, the current rolling process is substituted with the milling process. Since the milling process enables the integration of all operations of worm manufacturing on a CNC(Computer Numerical Control) lathe, productivity can be remarkably improved. In this study, the tooling system for side milling on a CNC lathe to improve machinability is developed. However, the cutting tool-workpiece interference is important factors to be considered for producing high quality worms. For adaptability of various worms machining, the tool-workpiece interference simulation system based on a tool-tip trajectory model is developed. The developed simulation system is verified through several kinds of worms and experimental results.

• 한국정밀공학회지
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• 제26권12호
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• pp.47-54
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• 2009

A worm screw is widely used in a geared motor unit for motion conversion from rotation to linear. For mass production of a high quality worm, the current rolling process is substituted with the milling process. Since the milling process enables the integration of all operations of worm manufacturing on a CNC(Computer Numerical Control) lathe, productivity can be remarkably improved. In this study, the tooling system for planetary milling on a CNC lathe to improve machinability is developed. However, the cutting tool-workpiece interference is important factors to be considered for producing high quality worms. For adaptability of various worms machining, the tool-workpiece interference simulation system based on a tool-tip trajectory model is developed. The developed simulation system is verified through several kinds of worms and experimental results.

• 한국전자파학회논문지
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• 제22권6호
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• pp.631-640
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• 2011

본 논문은 바이스태틱 레이더 환경에서 표적 검출을 위한 체계 분석용 M & S 툴을 제안한다. 바이스태틱 레이더 파라메타 및 $P_d$(probability of detection), $P_{fa}$(probability of false alarm)와 수신 신호의 SNR과의 상호 연관성을 설명하고, 이들 값에 의해 바이스태틱 레인지 곱 및 레인지 합의 범위가 결정되는 과정을 분석한다. 또한, 수신 레이더가 탐지 거리 등의 요구 조건을 만족시키기 위해 요구되는 수신 펄스 적분 개수를 유도하고, 재머 환경에서 바이스태틱 레이더 성능 열화 정도를 분석한다. 마지막으로 분석 결과를 4가지 모듈로 구분하여 M & S 툴로 구성한 후 이에 대한 시뮬레이션 결과를 보인다.

• 디지털콘텐츠학회 논문지
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• 제16권6호
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• pp.893-900
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• 2015

국제해사기구에서는 e-Navigation의 개발과정에 소프트웨어 품질에 대한 고려가 필수적으로 도입될 수 있도록 해양소프트웨어품질보증을 진행해오고 있다. 소프트웨어 품질 확보를 위해서는 소프트웨어 개발 프로젝트 전반에 걸쳐 정해진 절차를 따르고, 각 절차를 수행한 결과로 산출물의 작성이 필요하다. 이를 지원하는 도구의 활용은 소프트웨어 개발의 생산성에 중요한 요소가 될 수 있다. 본 논문에서는 실시간 모니터링과 문서의 자동화가 가능한 도구를 활용하여 해양 소프트웨어 개발에 적용하기 위한 사례를 소개한다. 도구 활용에 대한 기대효과 및 해양 SQA에 적용하기 위한 절차의 개선에 대해서 논의한다. 개선된 절차를 도구에 반영하여 해양 SQA에 맞춤형 도구를 개발하는 것을 향후 목표로 한다.

• 한국컴퓨터정보학회논문지
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• 제10권4호
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• pp.37-46
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• 2005

인간의 건강한 삶을 위해 의료정보 서비스에 대한 수요가 급증함에 따라 웹 환경에서 상호작용적으로 작동할 수 있는 의료정보 서비스를 위한 밀티미디어 콘텐츠저작 시스템이 필요하다. 본 논문에서는 웹 기반 밀티미디어 지원 언어인 SMIL(Synchronized Multimedia Integration Language)을 이용하여 사용자 친화적 인터페이스 기능을 갖는 SMIL 기반 의료정보 서비스를 위한 멀티미디어 콘텐츠 저작시스템을 개발하였다. 본 논문에서 개발된 저작도구는 부분적으로 작성된 결과를 편집 즉시 재생하고 확인 수정할 수 있으며, 멀티미디어 객체를 간편하게 삽입할 수 있어 다양한 형태의 의료정보 요소를 포함한 멀티미디어 콘텐츠를 쉽게 저작할 수 있다. 또한 사용자의 편리성을 증대시켜 효과적으로 다양한 의료정보 서비스가 제공 가능한 멀티미디어 콘텐츠를 실현할 수 있다.