• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.417-422
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• 2008

The DC high speed circuit breaker used in Seoul Metro for line no.1.2 is Japan HITACHI and FUJI breaker, and for line no.3.4 is Whipp & Bourne MM74 breaker from UK. The years that each breakers made are 1973(line no.1), 1984(line no.3.4), So that equipments are superannuated. Nowday the for equipment exchanging is executing, equipment for exchanging were used the Secheron breaker from Swiss. but now the Intec breaker made in Korea is used. The RTU of supervisory control and data acquisition system have the capabilities that can observe, control and work the installation efficiently. In this paper, as summarizing the solving process of problem that happened the SCADA system when old-equipment exchange and concerned point for logical supervision and control of reservation factors and equipment, I'll provide the direction that can do receiving-process of control-equipment, progressed with the exchange of old-electronic equipment.

• 설비공학논문집
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• 제21권4호
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• pp.209-214
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• 2009

The purpose of this study is to investigate the effect exchanging water supply on the' rainwater in detached house. It is difficult to decide water supply amount for a closet in detached house, Therefore, to obtain water supply for closet in detached house, it used regression equation using 1,569 data of frequency of used closet and during 120 days. In detached house, the frequency of used closet is 14.6 times/day and water supply amount is $219 {\ell}/day$. The optimum rainwater tank size which is decided by regression equation and using weather data is $8.5\;m^3$. The effect exchanging water supply on the rainwater in detached house is up 50%.

• 한국군사과학기술학회지
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• 제11권1호
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• pp.51-56
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• 2008

The counter-fire operation system performs its mission exchanging information with other related systems such as command & control systems and military information systems. In the process of exchanging information, the counter-fire operation system uses a type of data message which contains exchange data information in the format of KMTF. The requirement of data exchange of count-fire operation will continue to evolve. But the EDX(External Data eXchange) configuration item of the current counter-fire operation system can not effectively cope with the variation of data exchange requirements due to its fixed software structure. In the paper, a solution for improving flexibility of external data exchange in counter-fire operation system is proposed.

• Korean Chemical Engineering Research
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• 제52권3호
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• pp.378-381
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• 2014

방사선 그라프트 중합에 의한 이온교환필터를 이용하여 물에 포함된 미생물의 살균 효과를 연구하였다. 이온교환필터는 부직포 필터에 전자선을 조사한 후, GMA를 그라프트 중합시켰으며, 이 GMA 필터에 이온교환기를 도입시켜 이온교환필터(EtA, DEA, SS)를 도입하였다. 그 결과 이온교환기 밀도는 EtA의 경우 2.38 mol/kg, DEA는 1.79 mol/kg, SS는 0.75 mol/kg으로 나타났다. 이렇게 제작된 필터를 통해 E. coli의 살균력을 측정하였다. SS-diol 필터의 경우 log 4.65로 EtA, DEA에 비해 각각 약 3.00배, 1.10배 높은 제거율이 나타났다. 이는 상수처리 기준 3000 CFU/ml와 비교하여 우수한 결과를 나타냈음을 알 수 있었다.

• 한국CDE학회논문집
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• 제9권1호
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• pp.11-18
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• 2004

CAD systems have been developed with network technology and it is needed to exchange product data among them. STEP becomes world-wide international standard to exchange CAD data among various heterogeneous CAD systems in manufacturing industrial fields. We report results to test errors that can happen when exchanging STEP files of product model through the STEP translator of different commercial CAD systems. Also the tests of Korean Character, Hangul, have been carried out. And also we report the STEP rallies held twice in Korea and several rounds abroad, and their testing results are shown as tables and graphs. The tested results can be used for exchanging product models to the next domestic STEP Rally and extended to Northeastem Asian STEP rally by steadily contacting with the organizations for Asian STEP centers such as JSTEP(Japan) and CSTEP(China). Finally we expect that the result can be used to specify STEP standardization in the field of managing product data.

• 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.

• 디지털콘텐츠학회 논문지
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• 제16권6호
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• pp.927-934
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• 2015

IMO의 이-내비게이션은 안전항해와 해양환경 보호를 위해 진행중인 프로젝트이다. 이-내비게이션의 전략 이행 계획 중 마리타임 클라우드라는 프로젝트가 존재한다. 마리타임 클라우드는 해양 이해관계자들 간의 정보교환을 위한 IT 프레임워크 기술이다. 마리타임 클라우드의 아키텍처와 클라이언트 프로그램인 EPD를 분석하여 구조, 동작방식 등을 파악하였으며 이를 통해 실제 클라이언트 프로그램을 구현하였다. 클라이언트 프로그램으로는 현재 AIS-ASM을 통해 제공되고 있는 서비스인 정박정보(Berthing Data)를 대상으로 마리타임 클라우드의 메시지 전달 기능인 MMS 서비스를 이용해 데이터 교환이 이루어질 수 있는지 테스트하였다. 테스트 결과 MMS 서비스를 이용한 데이터 교환에 성공하였으며 이는 향후 마리타임 클라우드 서비스 개발에 도움이 될 수 있으며, 한국형 마리타임 클라우드 개발에 기여할 수 있다.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1346-1351
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• 2009

In this paper we propose a framework for an Object Relational IFC Server (OR-IFC Server). Enormous amounts of information are generated in each project. Today, many BIM systems are developed by various CAD software vendors. Industry Foundation Classes (IFC) developed by International Alliance for Interoperability (IAI) is an open standard data model for exchanging data between the various BIM tools. The IFC provides a foundation for exchanging and sharing of information directly between software applications and define a shared building project model. The IFC model server is a database management system that can keep track of transactions, modifications, and deletions. It plays a role as an information hub for storing and sharing information between various parties involved in construction projects. Users can communicate with each other via the internet and utilize functions implemented in the model server such as partial data import/export, file merge, version control, etc. IFC model servers using relational database systems have been developed. However, they suffered from slow performance and long transaction time due to a complex mapping process between the IFC structure and a relational-database structure because the IFC model schema is defined in the EXPRESS language which is object-favored language. In order to simplify the mapping process, we developed a set of rules to map the IFC model to an object-relational database (ORDB). Once the database has been configured, only those pieces of information that are required for a specific information-exchange scenario are extracted using the pre-defined information delivery manual (IDM). Therefore, file sizes will be reduced when exchanging data, meaning that files can now be effectively exchanged and shared. In this study, the framework of the IFC server using ORDB and IDM and the method to develop it will be examined.

• 한국비블리아학회지
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• 제16권2호
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• pp.61-82
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• 2005

기록 생산에 책임이 있는 개인, 가문, 단체 등에 대한 정보를 기술하는 것은 맥락정보를 제공하는데 있어서 필수적이다. 기록물 생산자 전거제어를 통한 맥락정보의 구축을 기록물 내용표준인 ISAAR(CPF) 2판과 구조표준인 EAC(Encoded Archival Contort)를 중심으로 살펴본다. 또한 도서관, 아카이브, 박물관 등 상이한 정보서비스 기관별로 구축된 맥락정보를 서로 공유하고 교환하기 위한 모델을 EAC를 적용하여 제시한 유럽의 LEAF Project를 소개한다. 끝으로 전거파일 구축 및 교환에 있어서의 한계를 짚어보고 국가적 차원에서 맥락정보 구축을 위해 수행해야 할 과제가 무엇인지 제시한다.

• 한국정보통신학회논문지
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• 제16권6호
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• pp.1229-1234
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• 2012

본 논문은 데이터 중심 통신 미들웨어인 DDS에서 데이터 교환 시 미리 정의된 프로토콜에 의해 고정된 패킷 전송 방식을 사용함으로써 발생하는 문제점을 분석한다. 고정된 패킷 전송 방식은 노드 및 네트워크에 가해지는 부하가 동적으로 변경되는 환경에서 필요한 노드 리소스 사용량 증가에 적절히 대처하지 못하는 문제가 있다. 만약 노드와 네트워크에 가해지는 부하가 한계점을 넘으면 패킷 전송 성능이 급격히 떨어지게 되며 DDS 미들웨어의 가장 중요한 사용 목적인 실시간성을 보장하지 못하게 된다. 이를 해결하기 위하여 본 논문에서는 패킷 전송 방식을 실시간으로 조정하기 위한 적응형 패킷 전송 기법을 제안한다.