• Journal of Korea Spatial Information System Society
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• v.6 no.1 s.11
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• pp.3-17
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• 2004

With the rapid growth of the Internet geographic information services through the WWW such as a location-based service and so on. Web GISs (Geographic Information Systems) have also come to be a cluster-based architecture like most other information systems. That is, in order to guarntee high quality of geographic information service without regard to the rapid growth of the number of users, web GISs need cluster-based architecture that will be cost-effective and have high availability and scalability. This paper proposes the design of the cluster-based web GIS with high availability and scalability. For this, each node within a cluster-based web GIS consists of main memory spatial databases which accomplish role of caching by using data declustering and the locality of spatial query. Not only simple region queries but also the proposed system processed spatial join queries effectively. Compare to the existing method. Parallel R-tree spatial join for a shared-Nothing architecture, the result of simulation experiments represents that the proposed spatial join method achieves improvement of performance respectively 23% and 30% as data quantity and nodes of cluster become large.

• Journal of the Economic Geographical Society of Korea
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• v.9 no.3
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• pp.297-317
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• 2006

This article is aimed to find a more successful way to build a metropolitan-wide governance for enhancing industrial cluster in South-East region, Korea. We begin a research with reviewing a current study of regional cluster and its governance. New industrial system and agglomeration changed regional growth theory and urban system. In traditional system, a central city dominated economy of the metropolitan area. However, with development of new transportation and communication technology, a central city lost their superiority to suburban cities. In other words, growing competition between central and suburban cities changed traditional concentration and diffusion theory of urbanization which dominated urban geography for last decades. Next, current situation of development of industrial cluster in South-East region is examined to suggest policy for more competitiveness. South-East region has grown as the most prominent cluster of mechanical engineering and metal industry in Korea since the late 1970s. In the form of agglomeration and network of a specific and its related industry, South-East region has formed a linear industrial belt along with the inter-regional South Coast Highway and contain about ten industrial cities. Accompanying with this growing South-East region, a problem has risen from geographic mismatch between metropolitan-wide industrial cluster and its administrative boundary. Since industrial cluster has no specific administrative boundary, adequate government support for developing industrial cluster has not been provided. Responding to the problem, academics and policy makers maintain need in establishing a metropolitan-wide governance for supporting a cluster. At the end, this paper provides some implication to planners and policy makers.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.5
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• pp.875-878
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• 2006

In this paper, I design and implement a software streaming server platform which provides a software streaming service to geographically dispersed internet users. Through the use of QALoad, I verify the correct operation of implemented software streaming server platform.

• Proceedings of the Korean Information Science Society Conference
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• 2010.06a
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• pp.343-344
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• 2010

• The Safety technology
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• no.199
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• pp.16-17
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• 2014

충청남도 북서 단에 위치한 태안군. 이곳에는 현재 큰 변화의 물결이 일고 있다. 바로 석탄가스화복합발전(IGCC)설비와 국내 최대 석탄 화력 발전기 2기가 동시에 건설되는 등 그야말로 에너지 클러스터로 조성되고 있기 때문이다. 이에 이 사업을 진두지휘하고 있는 박형락 한국서부발전(주) 태안건설본부 본부장은 무엇보다 안전을 경영의 중심에 두고 있다. 대규모 국가기반 시설 건설현장인 만큼 그 어떤 가치보다 안전이 우선시 돼야 한다는 확고한 신념을 가진 것이다. 본지는 박형락 본부장을 만나 안전경영 철학 등에 대한 이야기를 나눠 봤다.

• The Safety technology
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• no.203
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• pp.24-25
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• 2014

수도권 시민들의 휴양지로 각광 받아온 아름다운 해변도시 태안이 미래 대한민국 산업을 뒷받침할 국내 최대 에너지 클러스터로 변신 중에 있다. 380MW급 석탄가스화복합발전기(IGCC)와 1000MW급 석탄화력발전기(2기)가 각각 2015년과 2016년에 준공될 예정에 있는 것이다. 대규모 국가기반시설 건설현장인 만큼 이 사업을 진행하고 있는 한국서부발전(주) 태안건설본부는 무엇보다 안전에 각별한 신경을 싣고 있다. 그리고 그 중심에는 강광주 안진품질팀장이 있다. 무재해 무사고 준공으로 국민들의 편안한 생활과 튼튼한 산업기반조성에 기여하고 싶다는 그를 만나봤다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1316-1319
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• 2015

본 논문에서는 대규모 분산 병렬 컴퓨팅 환경인 하둡 클러스터 시스템을 이용하여, 공간 객체들 간의 위상 관계를 효율적으로 추론하는 대용량 정성 공간 추론기를 제안한다. 본 논문에서 제안하는 공간 추론기는 추론 작업의 순차성과 반복성을 고려하여, 작업들 간의 디스크 입출력을 최소화할 수 있는 인-메모리 기반의 아파치 스파크 프레임워크를 이용하여 개발하였다. 따라서 본 추론기에서는 추론의 대상이 되는 대용량 공간 지식들을 아파치 스파크의 분산 데이터 집합 형태인 PairRDD와 RDD로 변환하고, 이들에 대한 데이터 오퍼레이션들로 추론 작업들을 구현하였다. 또한, 본 추론기에서는 추론 시간의 많은 부분을 차지하는 이행 관계 추론에 필요한 조합표를 효과적으로 축소함으로써, 공간 추론 작업의 성능을 크게 향상시켰다. 대용량의 공간 지식 베이스를 이용한 성능 분석 실험을 통해, 본 논문에서 제안한 정성 공간 추론기의 높은 성능을 확인할 수 있었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.675-677
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• 2007

클러스터 시스템의 응용 분야가 다양화되고 복잡해짐에 따라, 대규모 클러스터 시스템을 보다 효율적으로 사용하기 위해서 실제 사용자의 이용 패턴을 예측할 수 있는 워크로드 분석의 필요성이 높아지고 있다. 워크로드 분석으로는 다양한 작업이 진행되는데 특히 파일 단위의 동적 접근 분석도 이에 포함된다. 본 논문에서는 실험용 병렬 파일 시스템으로 많이 보급된 PVFS2 에 파일 단위접근 기록을 가능케하는 방안을 모색하고 이 기능의 활용 가능성을 살펴 보았다.

• Journal of Digital Convergence
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• v.10 no.9
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• pp.363-368
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• 2012

The Cluster-based routing protocol is consumed the energy consumption efficiently, but there are many isolated nodes while clustering, so these are impeding energy efficiency. Hop-by-hop based routing protocol is suitable large-scaled network or dynamic environment. However, with the periodic flooding signal and rapid energy loss of near sink nodes, the network life time become shorter. In this paper, We propose the hybrid routing protocol that combine the cluster based routing method for energy efficiency of nodes and hop-by-hop method for re-joining the isolated nodes and load balance of nodes in the near cluster using fibonacci sequence. Based on the analysis, it is proved that the hybrid routing protocol provided higher energy efficiency and less the isolated nodes than previous methods.

• The KIPS Transactions:PartC
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• v.8C no.6
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• pp.731-740
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• 2001

Multi-distributed web cluster model expanding conventional cluster system is the cluster system which processes large-scaled work demanded from users with parallel computing method by building a number of system nodes on open network into a single imaginary network. Multi-distributed web cluster model on the structured characteristics exposes internal system nodes by an illegal third party and has a potential that normal job performance is impossible by the intentional prevention and attack in cooperative work among system nodes. This paper presents the mutual authentication protocol of system nodes through key division method for the authentication of system nodes concerned in the registration, requirement and cooperation of service code block of system nodes and collecting the results and then designs SNKDC which controls and divides symmetrical keys of the whole system nodes safely and effectively. SNKDC divides symmetrical keys required for performing the work of system nodes and the system nodes transmit encoded packet based on the key provided. Encryption packet given and taken between system nodes is decoded by a third party or can prevent the outflow of information through false message.