• Nuclear Engineering and Technology
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• 제36권3호
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• pp.263-275
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• 2004

For the safe management of nuclear facilities, including a radioactive waste repository, data about the facility site and the surrounding environment must be collected and managed systematically. This is particularly true for a radwaste repository, which has to be institutionally controlled for a long period after closure. The objectives of this study are (1) to establish a systematical management plan for information about a radwaste repository site and its environment, and (2) to design a database management program for this information, based on the Relative Database Management System (RDBMS). The spatial data are designed by the geodatabase, which is a new object, based on the RDBMS, to manage spatial information related to the database. To meet this requirement, a new program called 'Site Information and Total Environmental data management System (SITES)' is being developed. The scope that produced from the first step of the present study for development of the SITES is introduced. The database is designed to combine spatial and attribute data, and is designed for the establishment of the Geographic Information System (GIS). The hardware and software systems are designed with consideration given to the total data management of the items within the radioactive environment.

• 융합보안논문지
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• 제20권1호
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• pp.69-75
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• 2020

지휘통제체계는 인간의 두뇌와 신경 조직처럼 정보·감시·정찰(ISR)에서 정밀타격체계(PGR)를 연결하는 링커이며 전투력의 중심이다. 미래 한국군의 지휘통제체계 구축시 기술적 문제뿐만 아니라 제도적 문제를 함께 고려해야 한다. 미국 국방부는 지휘 통제체계 개발에 앞서 보안 정책을 수립하고 이를 구체화하여 아키텍처 문서로 정리하며, 이를 토대로 보안 정책의 일관성과 지속을 유지한다. 본 논문에서는 미군의 지휘통제체계 구축시 적용하는 보안 아키텍처를 살펴보고 현행 한국군의 보안 관련 정책(규정)을 분석하여 미래 지휘통제체계 구축 시 보안 요구사항을 식별한다. 식별된 보안 요구사항을 그룹핑하여 현행 보안 관련 규정의 분야별 개선사항을 도출하여 제시하고자 한다.

• 대한조선학회논문집
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• 제46권2호
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• pp.179-188
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• 2009

WIG crafts are a high speed vessel with features of dynamic supported craft. These crafts, which are predominantly of light weight and operate any substantially greater speeds than conventional craft such as bulk carrier, tanker, container ship, etc., could not be accommodated under traditional maritime safety instruments. It means that there is the need for risk and safety levels to be assessed on a holistic basis, recognizing that high levels of operator training, comprehensive and thoroughly implemented procedures, high levels of automation and sophisticated software can all make significant contributions to risk reduction. To response this requirement, the Interim Guideline for WIG craft(MSC/Circ.1054) were developed in the view of the configuration of WIG craft, which fall between the maritime and aviation regulatory regimes. This paper reviews a safety assessment process and methodology to be used in the design phase of a new ship. The process and methodology is based on the risk-based approach and is applied to safety assessment in concept development phase of small WIG craft in the 20-person class.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제9권4호
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• pp.249-254
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• 2009

The today's decision making tasks in globalized business and manufacturing become more complex, and ill-defined, and typically multiaspect or multi-discipline due to many influencing factors. The requirement of obtaining fast and reliable decision solutions further complicates the task. Intelligent decision support system (DSS) currently exhibit wide spread applications in business and manufacturing because of its ability to treat ill-structuredness and vagueness associated with complex decision making problems. For multi-dimensional decision problems, generally an optimum single DSS can be developed. However, with an increasing number of influencing dimensions, increasing number of their factors and relationships, complexity of such a system exponentially grows. As a result, software development and maintenance of an optimum DSS becomes cumbersome and is often practically unfeasible for real situations. This paper presents a technically feasible approximation of an optimum DSS through decreasing its complexity by a modular structure. It consists of multiple DSSs, each of which contains the homogenous knowledge's, decision making tools and possibly expertise's pertaining to a certain decision making dimension. Simple, efficient and practical integration mechanism is introduced for integrating the individual DSSs within the proposed overall DSS architecture.

• 정보처리학회논문지A
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• 제10A권3호
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• pp.255-260
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• 2003

RFID의 대표적 예인 비접촉식 IC 카드는 현재 교통 및 출입 통제 시스템 등에 널리 사용되고 있으며, RF 기술의 발달과 사용자 편의성 요구의 증대로 인해 점점 더 보편화되는 추세에 있다. 본 논문은 비접촉 IC 카드를 구현하기 위해 필요한 내장형 비접촉 프로토콜 처리용 하드웨어 모듈에 관한 것으로서 아날로그 회로부와 특화된 디지털 로직부로 구성된다. 그리고 비접촉 IC 카드 설계시 아날로그 회로, 디지털 로직, 그리고 소프트웨어가 담당한 기능을 잘 구분하여 설계할 수 있는 방법을 제시한다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2018년도 학술발표회
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• pp.485-485
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• 2018

Rainwater harvesting system (RWH) can provide a relief for the household and farmers especially in areas with intense water scarcity during the long lull of rainy season. However, much attention has not been given to this alternative water source in Nigeria. This paper estimates the per capita water demand for 1,950 inhabitants and rainwater potential in Ojonbodu Estate, Oyo State, Nigeria, using data from detailed questionnaires, water consumption calculator software, and 20-year rainfall data. The potential rainwater estimation was based on amount of precipitation, size of catchment and runoff coefficient. Consequently, using estimated values of $39420m^3$ and $6.5114{\times}10^7m^3$ for per capita consumption and potential rainwater respectively, the rainwater harvesting system was designed for rainwater collection, and storage. The harvested rainwater was $450, 000m^3$ with collection efficiency of 69.16 %, which exceeded the household water consumption requirement. Thus, the harvested rainwater was able to meet the estimated water demand of the Ojonbodu Estate households during the period of water scarcity.

• 한국정보시스템학회지:정보시스템연구
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• 제12권2호
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• pp.129-149
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• 2003

One of the important applications in Enterprise Resource Planning(ERP) systems is the Manufacturing Resource Planning(MRPII) system using Bill of Material(BOM). The manufacturing resource planning determines the quantity and timing of the production or purchase of subassemblies and raw materials needed to support the Master Production Scheduling(MPS). The bill of material is the recipe, a list of the materials needed to make a product. This paper intends to suggest a component-based materials management system using Unified Modeling Language(UML), as an application system for automobile part industry. Applying component based materials management systems designed with UML methodology, we analyzed the workflow and the document on materials management process from production planning to inventory management, and implemented a prototype of efficient materials management system, as a surrogate of existing material requirement planning(MRPI) system. To produce many other assemblies for a automobile part firm, component parts are assembled into subassemblies that are joined to assemble the finished product. Through the system suggested in this study, the level of inventory has cut down and the cost of inventory management has decreased. Also, the development method using UML makes the analysis and design phase to shorten in implementation period of MRPII system. The implementation of materials management system using CBD shows the ease of use in software reuse and the interoperability with corporate Internal information system. The result of applying object-oriented CBD technique is to minimize the risk of life cycle and facilitate the reuse of software as mentioned to limitation of information engineering methodology.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 추계학술대회
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• pp.201-205
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• 1997

With the recent advance of Web and its associated technologies, information sharing on distribute computing environments has gained a great amount of attention from many researchers in many application areas, such as medicine, engineering, and business. One basic requirement of distributed medical consultation systems is that geographically dispersed, disparate participants are allowed to exchange information readily with each other. Such software also needs to be supported on a broad range of computer platforms to increase the software's accessibility. In this paper, the development of world-wide-web based medical consultation system or radiology imaging is addressed to provide the platform independence and great accessibility. The system supports sharing of 3-dimensional objects. We use VRML (Virtual Reality Modeling Language), which is the de-facto standard in 3-D modeling on the Web. 3-D objects are reconstructed from CT or MRI volume data using a VRML format, which can be viewed and manipulated easily in Web-browsers with a VRML plug-in. A Marching cubes method is used in the transformation of scanned volume data set to polygonal surfaces of VRML. A decimation algorithm is adopted to reduce the number of meshes in the resulting VRML file. 3-D volume data are often very large-sized, and hence loading the data on PC level computers requires a significant reduction of the size of the data, while minimizing the loss of the original shape information. This is also important to decrease network delays. A prototype system has been implemented (http://netopia.snu.ac.kr/-cyber/). and several sessions of experiments are carried out.

• 방송공학회논문지
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• 제19권1호
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• pp.14-23
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• 2014

본 논문은 최근 이동통신 네트워크에서 폭발적으로 증가하고 있는 비디오 트래픽이 야기한 문제와 요구사항의 해결책으로써, SDN(Software Defined Network)을 기반으로 하는 다중 무선 접속 기술(Multiple Radio Access Technology)의 제어 기법을 제안하고 그 성능을 자체 구축한 테스트베드를 통하여 평가한다. 이를 위하여, 먼저 사업자 입장에서 3rd-party의 비디오 트래픽을 사업자망으로부터 우회(off-loading)시키는 방안의 필요성과, 사용자에게 저비용으로 고속의 대용량 비디오 콘텐츠 서비스를 제공하는 방안에 대하여 논의한다. 또한 성능평가를 위한 테스트베드는 OpenStack 클라우드 및 SDN 기반으로 구축 하였다. 이를 통해, OpenFlow와 Open Switch를 이용하여 2개의 2.4GHz 무선 랜 링크와 3개의 5GHz 무선 랜 링크가 동시에 하나의 서비스를 지원하도록 함으로서 820 Mbps 급의 초고속 클라우드 비디오 서비스를 위한 전송 속도를 실현하였다.

• 한국멀티미디어학회논문지
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• 제8권3호
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• pp.398-412
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• 2005

레거시 시스템을 새로운 하드웨어 플랫폼과 새로운 소프트웨어 개발 패러다임에 맞도록 이주하려는데 대한 관심이 증가하고 있다. 그 이유는 레거시 시스템의 유지보수에 많은 비용이 들고 기존 시스템에 대한 문서 정보가 부족하다는데 있다. 레거시 시스템을 새로운 시스템을 변환하기 위해 스크린 스크래핑, 래핑, 부분 변환, 재개발 등등의 여러 다양한 접근법들과 도구, 그리고 방법론들이 제시되어왔다. 그러나 이러한 접근법들은 대부분이 코드 변환 혹은 일부 모델 변환 수준이기 때문에 아키텍처나 요구사항 수준에서의 변환까지는 체계적으로 제시하지 못하였다. 따라서, 본 논문에서는 이러한 한계점을 극복하기 위하여 아키텍처와 요구사항 단계까지 적용할 수 있는 3차원 공간 개념을 적용한 메타 모델 기반의 접근법을 제시하고자한다. 이러한 통합 모델은 재 공학에 있어서 역 공학 단계인 코드에서 아키텍처 그리고 순 공학 단계인 아키텍처에서 코드로의 자연스러운 변환 혹은 협력 진화(Co-evoluton)를 유도한다.