• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.270-273
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• 2015

In shipbuilding and marine industry, engineering and design software solutions have upgraded from the original 2D schematic data based CAD system to a modern 3D drawing-based system. Due to the fact that the massive amount of data usage in real time and data volumes of various engineering models including graphic data have increased, several problems such as lack of server resources and improper handling of 3D drawings have been raised. Besides, increasing the number of session connections per server can cause deterioration of server performance. Recently, increasing the yard's sophisticated design capabilities highlighted the need to develop engineering and design system which would not only overcome the network performance issues, but would provide efficient collaborative design environment. This paper presents an overview of the framework for collaborative engineering design system based on the virtual application (Citrix XenApp 6.5)and acceleration hardware technology of 3D graphics (NVIDIA GRID K2 solution).

• Journal of KIISE:Computing Practices and Letters
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• v.8 no.6
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• pp.727-735
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• 2002

In this paper, we design and implement a MPLS based IP-VPN service module as an application for ACE2000 MPLS system. ACE2000 MPLS VPN service module has been developed using the BGP4 extension protocol. The IP-VPN service module supports differentiated QoS using the MPLS traffic engineering. In addition, it offers a path protection mechanism and the restart mechanism of MPLS system and forwarding engine for supporting a highly reliable service.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.21-24
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• 2017

본 논문은 함정 전투체계의 아키텍처를 설계하고 세부 기능을 분석 및 구현하기 위한 방안 연구를 위해 작성되었다. 함정 전투체계와 같이 복잡도 높은 대규모 시스템에서 문서 산출물에 근거한 개발은 산출물 간 유기적인 연결이 어렵고 요구조건의 변화에 따른 영향 요소 식별 및 반영이 어렵다는 단점을 갖는다. 이에 대한 대안으로 제시된 모델 기반 개발 방법론을 함정 전투체계에 적용하기 위해 미 국방 분야 표준 아키텍처인 DoDAF와 이를 지원하는 UPDM, 시스템 엔지니어링과 소프트웨어 엔지니어링 분야의 모델링을 지원하는 SYSML/UML을 살펴보고 함정 전투체계에 적합한 모델 구성 및 각 개발 단계 별 모델링을 수행하는 절차에 대한 가이드라인을 제시한다.

• Journal of the Korean Society of Systems Engineering
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• v.1 no.2
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• pp.34-42
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• 2005

Logistic Support Analysis(LSA) and Logistic Supportability Review must be carried out as soon as possible in development stage in order to minimize operation/maintenance cost that head the list of weapon cost and improve logistic supportability of the weapon system. And the result must be used for hardware designs to set up to be able to input to the system design and logistic support elements. Therefore Logistic Support Elements must be planed/developed/supplied with the main combat system concurrently and performance and logistic supportability of the comabat system had better be improved mutually. This report describes maintenance concept changes of weapon systems, fault diagnosis function and test equipment state on the domestic MBT(main battle tank). And then it presents application and intensification of itself fault diagnosis system for a domestic future MBT considering connection with IETM(Interactive Electronic Technical Manual) and TE(Test Equipment).

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2006.06a
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• pp.189-192
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• 2006

For the safety and efficiency of voyage, the demand for decision support system in route planning has been increasing with the advance of information technology and the increase of oil price. According to the needs, the authors developed an optimum route assessment system. The system assists an navigator to make an optimum route plan with respect to sailing time and fuel consumption using weather forecast data. Also, the system provides the quantitative estimation for the various safety indexes including parametric roll and etc. Using these functions, a navigator is able to design the safe and efficient voyage plan. The effectiveness of system were verified by the operation during actual voyages and the simulation studies.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2011.10a
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• pp.80-80
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• 2011

본 논문은 윈도우에 디바이스 드라이버 형태로 동작하는 실시간 이식 커널을 제안한다. x86하드웨어에서 제공하는 Local APIC(Advanced Programmable Interrupt Controller)를 이용하여 윈도우와는 별도의 타이머를 제공하여, 독립적인 타이머 인터럽트를 통해 실시간성이 필요한 서비스가 정확한 주기로 동작하여 마감시한을 보장한다. 그리고 1553b 통신에서 IP470을 통해 오실로 스코프로 테스트하여 제안한 실시간 이식 커널이 실시간성을 보장함을 보인다.

• Journal of the KSME
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• v.30 no.3
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• pp.267-274
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• 1990

기술분야의 발전이 거듭됨과 병행하여, 산업계의 설계 해석 부서에서 CAE의 중요성은 컴퓨팅 시 스템과 더불어 더욱 강조되고 있다. 슈펴 컴퓨팅 파워의 필요성은, 첫째, applied mechanics의 advanced 해석분야, 둘째, 대형 엔지니어링 문제해석 결과처리 (data acquisition & management), 셋째, real time response와 integrated 엔지니어링 시스템개발 (CAD/CAM 데이터와의 연계성) 등의 측면에서 나타난다고 볼 수 있다. 원가, 안정성 그리고 신뢰성은 모두 만족시키는 효율적인 방안으로서는 대형 수퍼 컴퓨터와 마이크로 컴퓨터의 중간 역할을 할 수 있는 hybrid type의 미니 수퍼 시스템, 즉 departmental highly-parallel 시스템의 등장이 필수적이라고 할 수 있다. 또한, 산업계의 설계 해석 지원과 관련, 구조, 유체, 동력학 등의 분야별 응용 문제와 numerical formulation등의 특성에 적합한 시스템 configuration과 프로세싱이 개발되어야 한다. 이는 실 수요자의 상황에 맞는 "목적성 전용 machine"의 등장이 가능해 질 것으로 판단된다. 향 후, vectorization 그리고 parallelization 된 소프트웨어의 가용성이 극복해야 할 큰 과제로 남아 있 다고 본다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04b
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• pp.1519-1522
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• 2002

최근 비연결지향형(Connectionless)의 IP 상에 연결지향형(Connection-oriented)의 LSP 를 지원하는 MPLS(Multi-Protocol Label Switching) 서비스에 대한 관심이 증가되고 있다. 이는 트래픽 엔지니어링(TE: Traffic Engineering)과 Qos(Quality of Service) 제공 등의 향상된 서비스에 대한 요구사항이 증가하면서, 이에 적합한 차세대 인터넷 서비스의 효율적인 제공 방안으로 IETF 에서 표준화하고 있는 MPLS 기술이 대두되고 있기 때문이다. 이러한 사용자의 요구사항을 만족하기 위하여 한국전자통신 연구원에서는 ACE2000 MPLS 시스템을 개발했으며, 초고속망에 적용되는 MPLS 시스템을 관리하기 위한 관리 시스템을 개발하였다. 본 논문에서는 SNMP(Simple Network Management Protocol) 기반의 MPLS 망 관리 시스템과 트래픽 엔지니어링 관리 기능을 중심으로 관리 대상, 관리 수행 절차 등을 설명한다.

• Journal of the Korean Society of Systems Engineering
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• v.9 no.1
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• pp.33-45
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• 2013

Systems Engineering Approach was applied to the development of operator-support core management system based on the on-site operation experience and document of core management procedures, which is for enhancing operability and safety in PHWR (Pressurized Heavy Water Reactor) operation. The dissertation and definition of the system were given on th basis of investigating and analyzing the core management procedures. Fuel management, detector calibration, safety management, core power distribution monitoring, and integrated data management were defined as main user's requirements. From the requirements, 11 upper functional requirements were extracted by considering the on-site operation experience and investigating documents of core management procedures. Detailed requirements of the system which were produced by analyzing the upper functional requirements were identified by interviewing members who have responsibility of the core management procedures, which were written in SRS (Software Requirement Specification) document by using IEEE 830 template. The system was designed on the basis of the SRS and analysis in terms of nuclear engineering, and then tested by simulation using on-site data as a example. A model of core power monitoring related to the core management was suggested and a standard process for the core management was also suggested. And extraction, analysis, and documentation of the requirements were suggested as a case in terms of systems engineering.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.322-326
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• 2007

Recently, as construction projects are getting bigger and more complex, the number of participants has been tremendously increased. According to the current trend, the necessity of collaboration design management controlling communication and information exchange among many participants has came up. So this study considers the roles and tasks of each participant and informations that occur in each design stage, and looks into the present status of collaboration in design management of domestic design companies. Finally, the function of collaboration system is drove. It supports tasks of design participants, such as input design outcome, decision making among concerned people and solution of design change and interference.