• 해양환경안전학회지
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• 제4권1호
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• pp.21-29
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• 1998

Through the rapid development in personal computer technology, it has recently become possible to make a radar become possible to make a radar simulator based on the PC. Althougth such a technology has already been developed in the advanced countries like Japan, U.K., and U.S.A., our country has not been able to make such a simulator so far. In addition, revised STCW convention requires the maritime training institution to be equipped with the ARPA simulator satisfying the performance standard specified in the convention. In this thesis therefore, an attempt was made to developed the software of the ARPA radar simulation system using Visual Basic 4.0, with which we can finally make a Mockup style ARPA simulator satisfying the performance standard specified in the convention. In this thesis therefore, and attempt was made to developed the software of the ARPA radar simulation system using Visual Basic 4.0, with which we can finally make a Mockup style ARPA radar simulator. The system developed through the research has been found to run successfully on the desk top personal computer(586PC). A Mockup style ARPA radar simulator will be able to be made by simply installing this software on the PC which will be placed inside a ARPA radar Mockup, and this is one of the future research subjects.

• 한국의류학회지
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• 제36권9호
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• pp.991-999
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• 2012

The Korean wintertime Onmapsi Campaign recommends wearing underwear, layered clothing, or thermal accessories in an indoor environment of a lower than room-heating condition. We surveyed 132 government officers, about Onmapsi wearing conditions and campaign satisfaction. The term was found to be unfamiliar to them, even if they wore underwear or thermal accessories as participants in the campaign for the wintertime office of low temperature 18-$20^{\circ}C$. They wore thick shirt/pants or cardigans/sweaters; however, underwear or thermal vests was worn relatively less. They wear 2.9 layers on top and 1.7 layers in bottom in average. They have their own methods to keep the body warm, which are using 1) functional thermal clothing, such as turtleneck shirts of heat technology new material, 2) functional thermal accessories, such as warmer and muffler, 3) functional office goods, such as a thermal computer mouse and blanket on the desk. The campaign requires more advertisement, a revision on the details of the proper wintertime indoor environment, and develops the varieties of Onmapsi apparel.

• 한국항해학회지
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• 제20권3호
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• pp.13-30
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• 1996

It is general that large ships entering or leaving a port located in the East coast of Korean peninsular are often exposed athwart to swell while maneuvering in the vicinity of breakwater at harbor enterance or to prevailing wind inside the port in winter. Particulary, Many VLCCs laden with ore coal are calling at Pohang Port, on account of which it is likely that one of those VLCCs block the port if they were to run aground in fairway due to adverse circumstance of swell, prevailing winds or improper shiphandling. This accident may result in delay of delivery of raw material for Pohang Steel Mill which will bring about shortcomings of steel products for nationwide relevant industries causing national economic shock. Therefore, This study basically aims at establishment of certain criteria for safe unberthing of VLCC in this port to prevent such unexpected disaster because any VLLC is highly affected by external forces when in ballast condition. Computer simulations are unavoidable to fulfull this study successfuly and many simulations have been carried out repeatedly to find a model of safe unberthing under various unfavourable wind conditions. The "PC-based ship maneuvering simulator for training purpose" was used to perform numerous simulations at the least economic burden and to verify its availability that it can be used not only for training but also some other purposes. purposes.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1997년도 Proceedings International Workshop on New Video Media Technology
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• pp.75-81
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• 1997

A new DTPP (Desk-Top Program Production) system has been developed that enables multiple program producers (directors) working at different locations to collaborate over a computer network and prepare a single program for broadcasting. In this system, information is shared among users by exchanging data edited on non-linear editing terminals in program post-production work over a network in real time. In short, the new DTPP system provides a collaborative work space for producing TV programs. The system does not make use of a special server for collaborative work but rather multiple interconnected editing terminals having the same functions. In this configuration, data at a terminal which has just been edited by some operation is forwarded to all other connected terminals for updating. This form of information sharing, however, requires that some sort of data synchronizing method be established since multiple terminals are operating on the same data simultaneously. We therefore adopt a method whereby the system synchronizes the clocks on each terminal at the time of connection and sends an operation time stamp together with edited data. This enables most recently modified data to be identified and all information on all terminals to be updated appropriately. This paper provides an overview of this new collaborative DTPP system and describes the techniques for exchanging edited data and synchronizing data.

• 한국항해학회지
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• 제20권2호
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• pp.1-13
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• 1996

Most of the ShipHandling Simulators of full-mission-bridge system need vast area to install and even PC-based maneuvering simulators are often equipped with Steering Wheel or Engine Telegraphe etc. of data input interface, which necessarily makes the user face with excessive financial burden. These have been one of the obstacles for the officers, captains, pilots and students in access to maneuvering simulation whenever they want to try it in advance prior to actual ship maneuvering. Subsequently, all the officers and captains come to have little chances to train themselves until they arualified as a pilot after a long period of time of realship maneuvering practice on board, which means they have to control they have to control their own ship at sea without clear understanding on her maneuverability when they are forced to do it on the way. And these lack of capability for maneuvering have used so often to result in marine casualties of collision with other ships or pier facilities while maneuvering in harbor. To prevent those accidents by means of enhancing their maneuvering ability, PC-based DeskTop Simulator that allows anyong to access readily at anytime is needed and in conformation to such demand this simulator has been developed. The Software this simulator written in Turbo Pascal Ver. 5.0 has adopted MMG mathmatical model theoretically in part and also it was designed to make it possible that all numeric data inputs and outputs with graphic presentation for maneuvering operation be carried out just only with keyboard and monitor console. With the Simulation software, all the officers, captains, pilots and even students who has a proper computer at hand are expected to be able to make an attempt to simulate the maneuvering of their ownship or any other types of them at any port in which they want to do it.

• 한국정보과학회논문지:정보통신
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• 제27권2호
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• pp.109-122
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• 2000

MPEG 형식의 비디오 데이타의 사용이 점차 늘어남에 따라, 이런 데이타를 자유롭게 편집할 수 있는 편집기의 필요성이 점차 증가하고 있다. 그러나 MPEG 데이타는 연속된 프레임들의 차이만을 저장하는 방법을 사용하기 때문에 두 개의 MPEG 데이타를 전환 효과를 주어서 편집을 하기 위해서는 압축을 해제한 후 효과를 주고 다시 압축하여야 하는 문제점을 가지고 있다. 이런 문제점을 해결하기 위하여 본 논문에서는 MPEG 형식으로 압축된 두 비디오 데이타에 대하여 부분적으로 압축을 해제한 상태에서 여러 종류의 장면 전환 효과(페이드 인 및 페이드 아웃, 디절브)를 적용할 수 있는 방법을 제안하였다. 제안한 방법에서는 MPEG형식 비디오 데이타의 I와 P프레임에 대하여서는 압축을 부분적으로 해제하는 전환 효과를 주는 기존의 방법을 응용하여 적용하였으며, B 프레임의 경우에는 참조 프레임에 대한 움직임 벡터를 기초로 구해진 움직임 보상 근사값을 이용하여 DCT 영역에서 장면 전환 효과를 주는 방법을 새로이 제안하였다. 이런 압축 영역에서의 장면 변화 적용 방법을 사용함으로써 압축을 해제하여 효과를 주는 것 보다 전환되는 프레임들의 화질을 유지하면서 3-4배 정도 빠르게 편집할 수 있다. 이러한 방법을 MPEG 비디오 편집기 시스템에 적용하게 된다면, 소프트웨어만을 이용한 저가의 데스크 탑 환경에서도 효율적인 비디오 편집 작업이 가능하게 될 것이다.

• 한국정보과학회논문지:시스템및이론
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• 제33권9호
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• pp.574-584
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• 2006

최근 MPEG-A(ISO/IEC 23000)에서는 MAF(Multimedia Application File Format)[1]라는 새로운 멀티미디어 파일 포맷을 제안하고 있다. MAF 파일포맷은 기존의 MPEG 압축 규격을 갖는 미디어 파일에 더해, 미디어 내용 정보를 기술하는 메타데이타를 MPEG-7을 사용하여 하나의 시스템 포맷 내에 포함할 수 있도록 해준다. 하지만 현재로서는 이러한 표준을 구현한 실제 시스템이 없기 때문에, 응용 측면에서 MAF가 얼마나 유용한지 검증하기 어렵다는 문제점을 가지고 있다. 본 논문에서는 PC와 모바일 단말기상에서 MPEG-A 표준을 기반으로 한 멀티미디어 검색 시스템을 설계 및 구현한다. 또한 MPEG-A에서는 아직 동영상에 관련된 메타데이타에 대해서는 제안된 바가 없기 때문에 MPEG-7 MDS(Multimedia Description Scheme)[2]와 TV-Anytime[3]을 기반으로 모바일 환경에서도 저작 및 사용하기 편리한 메타데이타들을 설계한다. 전체 시스템을 설계하기 위해서 MAF 검색 시스템이 가져야 할 5가지 요구사항인 이식성, 확장성, 호환성, 적응성, 효율성을 정의하고 이러한 요구사항을 바탕으로 하여 MAF 검색 시스템의 전체 구조를 응용 계층, 미들웨어 계층, 플랫폼 계층으로 설계한다. 제안하는 검색 시스템은 MAF 형식의 멀티미디어 데이타를 저작, 재생, 검색할 수 있는 클라이언트 파트와, 대용량의 MAF 형식의 멀티미디어 파일과 MAF 파일로부터 추출한 MPEG-7 형태의 메타데이타를 저장, 관리할 수 있는 서버 파트로 구성된다. 그리고 설계한 MAF 검색 시스템의 유용성을 검증하기 위하여, PC에서는 MS 윈도우 플랫폼 그리고 모바일 단말기에서는 WIPI 플랫폼 상에서 클라이언트 시스템을 구현하고 시스템 요구사항들을 모두 만족하는지 여부를 확인한다. 제안하는 검색 시스템은 MPEG-A 표준을 검증하고 그 유용성을 확인하기 위해 사용될 수 있다.