• Proceedings of the IEEK Conference
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• 2003.07b
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• pp.855-858
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• 2003

TCP/IP 를 포함하는 데이터 네트워킹 프로토콜을 구현함에 있어, 기존에는 소프트웨어 방식으로 구현되었던 모듈들을 하드웨어로 구현하는 프로젝트를 수행하면서, CPU 와 하드웨어 모듈과의 통신을 중계하는 모듈을 구현하였다. 본 논문에서는 TCP/IP 하드웨어와 CPU 와의 통신을 위한 Host Interface 의 기능에 대해 다루고 구현 방식을 Control flow와 Data flow의 입장에서 설명하였다. 우선, Host Interface 의 기능을 설명하고 Host Interface 의 입출력 신호를 정의하였다. Host Interface에서 이루어지는 CPU와 하드웨어 모듈간의 통신을 제어정보 흐름과 데이터정보 흐름으로 나누고 제어흐름을 위해서는 Command/Status Register 를 두었고, 데이터 흐름을 위해서는 CPU와 데이터 RAM 사이에 FIFO 를 두어 데이터의 흐름이 신속히 이루어지도록 하였다. 끝으로 Host Interface 와 주변 모듈들간의 통신에 대한 Testcases에 대해서도 다루었다.

• Electronics and Telecommunications Trends
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• v.26 no.5
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• pp.55-65
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• 2011

요즘 신산업으로 떠오르고 있는 개인 유전체 분석이나 차세대 시퀀싱 기술과 같은 고성능 컴퓨팅 응용들은 data-intensive한 작업들을 요구하며, 이러한 응용을 지원하기 위한 고성능 파일 시스템 기술에 대한 연구들이 다수 진행 중이다. 그러나 그 결과물들은 업체별로 보유한 고유 기술로서, 상호 호환성 등의 문제로 인해 표준화의 필요성이 제기되어 왔다. 현재 파일 시스템과 관련하여 거의 모든 IT 업체에서 사용하고 있는 실질적인 표준은 NFS(Network File System)이다. IETF(Internet Engineering Task Force)에서는 이러한 요구사항들을 반영하여 2010년에 NFSv4.1 표준을 공표하였고, 특히 I/O 성능을 향상시키기 위한 pNFS(parallel NFS)는 NFSv4.1의 핵심 기능으로서 다수업체들과 연구기관들에서 많은 관심을 받고 있다. 본 고에서는 pNFS 표준화 및 연구개발 동향과 관련된 이슈들에 대해 기술하고자 한다.

• Spatial Information Research
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• v.9 no.1
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• pp.155-169
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• 2001

Although the strategies and experiences of GIS leading countries are considered for the implementation of NGIS-Development in Korea, the western european nations cases are not analysed. Based on this study focused on German approaches to establish and implement the construction of national geospatial data framework. The goals, construction strategies and contexts of german national framework data, it called authoritative topographic-cartographic information system(ATKIS) in germany, are presented in detail. As a result, some lessons are suggested that can be learned by german approaches. Because we are now standing on the phase of "A Second Master Plan for National Geographic Information System", the german approach can be very for the development of the national framework database in Korea.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.31-33
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• 2010

The image communication system based on power line communication(PLC) that manages the status of workers in deteriorated. work environments such as high temperature and pressures as realtime is designed and implemented in this paper. The major design considerations for system design are such that the adaptation of simple architecture, simplicity of installation and movement, tolerances about high temperature and pressures, transmission of high quality image under various noise environments.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.04a
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• pp.217-220
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• 1996

This study presents a R&D performance monitoring system (RDMS) that is applicable for managing nuclear program in KAERI. The prime goal of RDMS is to furnish project manager with reliable and accurate information on status of progress, performance and resource allocation, and attain traceability and visibility of project implementation for effective project management. In this study, the work breakdown structure (WBS) as the governing factor for integration of scope, schedule, resource data was derived, and the above parameters were loaded personal computer. A RDMS is comprised of about 12,000 R&D activities of the 16 goverment-led projects. The Primavera software was used to monitor the progress, evaluate the performance and analyze the resource distribution to activities.

• Spatial Information Research
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• v.5 no.1
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• pp.77-88
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• 1997

This paper presents the design and implementaion of an object-relational geographic information system. This system has been developed on top of a commercial object-relational database management system. It provides flexible spatial data model, spatial query language, visual user interface, and efficient spatial access methods(D0T) in which traditional primary-key access methods can be applied. We report on our design choices and describe the current status of Implementation. The conceptual model of the system is based on SDTS, and is mapped to the intemal obiect-oriented data model. Kevwords : object-oriented data model, GIS, spatial data model, spatial access method.

• Journal of Institute of Control, Robotics and Systems
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• v.5 no.7
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• pp.868-875
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• 1999

In this paper, digital motor control center using protection relay is developed in order to protect power systems by means of timely fault detection and diagnosis during operation for induction motor which have various load environments and capacities in power systems. Digital motor control center is employed by power supervisory control systems without separate remote terminal unit and transducers adding communicational ability. Also we develope a maximum demand controller to control the load effectively at peak status and a power factor controller to minimize real power losses and improve the power factor. Therefore, when using the developed controller, real time computation is possible by loading DSP in hardware and applying real-time kernel which can convert each algorithm to task module.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.91-98
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• 2007

Community noise has been serious social issues in Korea. This paper reviews current statistics and status on railway noise, with practical engineering tools in order to reduce the noise level from railway traffic noise sources. At the beginning, guidelines of the current environmental policy are discussed, with the new policy on railway noise to be enforced beginning in 2007 with 5 year schedule. Then, a noise reducer is proposed as a tool to reduce noise levels protecting people living near at the railway. Details on the acoustic effect in field test are discussed with the result of implementation in the street. We propose noise reducers as an effective and practical tool for the people who are exposed to rail traffic noise in cities.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.1918-1923
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• 2010

In electic railway, 25kV is applied to AC sections of overhead contact lines and pantographs of Korea Train eXpress(KTX) make contact at speeds of 300km/h. Thus, there is a need to utilize wireless, optic, contact-less sensors to implement condition monitoring systems. This paper is based on describing and analyzing the condition monitoring system implementation technologies for efficient catenary current ratio characteristic assessment. The conclusion of this paper should be widely applied to design, diagnosis, completion of construction, current collection status, fault diagnosis, and selection of contact wires and suspension wires.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.29 no.3
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• pp.79-86
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• 2006

Especially, MTO(Make-To-Order) companies take collaborative approaches with their partner companies to make low-price products and/or technologically low intensive products. The collaborative approach to manufacturing requires collaboration with partner companies for inventory review, production plan, and manufacturing to fulfill customer's orders. However, frequent changes of partnerships binder partner companies from sharing production information in effective ways since their information systems have different data architectures and platforms. Therefore, it is required flexible and standardized system integration approach fir effective information sharing. This research studies current status and problems of collaborative production system, proposes an architecture for collaborative production systems based on Web Services which is a standard information technology, and discusses expected effects and the vision of Web Services.