• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.31-33
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• 2004

HLA (High Level Architecture) 는 모델링과 시뮬레이션 분야에서 상호 이질적인 서비스에 따른 어플리케이션의 상호운용성(interoperability)과 재사용성(reusability)을 증진시키기 위해 필요한 infrastructure를 개발하기 위한 청사진이다. RTI(RunTime Infrastructure)는 HLA 의 소프트웨어적 도구로써 IibTRI, FedExec, RTIExec의 세 가지 컴포넌트로 구성되어 있다. RTI는 분산환경에서 동적으로 다수대다수간의 통신을 제공하는 미들웨어 (middleware)이다. 대규모의 분산 시뮬레이션의 실행은 지리적으로 퍼져있는 많은 양의 컴퓨팅 자원을 필요로 할 수 있는데 이러한 환경이 가지는 보안과 동적 자원 할당이라는 문제점을 Globus Toolkit3(GT3)안의 Open Grid Service Arcitecture(OGSA)를 사용해서 해결할 수 있는 RTI-G를 개발해 왔고 이를 service-oriented RTI-G라 부른다. 이 논문에서는 service-oriented RTI on Grid 의 구조와 앞에 제시된 문제점들의 해결방안을 제시하고 실험한다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.148-150
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• 2003

지리적으로 분산된 유휴 자원들을 통합하여, 하나의 메타 컴퓨팅 환경을 제공하기 위한 연구가 활발히 진행되고 있다. 대표적인 것으로 그리드를 들 수 있는데, 통신망에 연결된 슈퍼컴퓨터. 클러스터 워크스테이션, 대용량 저장장치 및 측정장치 등과 같은 자원을 공유하는 더 강력한 가상의 컴퓨팅 환경이다. 그리드의 세부분야 중 어카운팅 분야는 다른 분야와는 달리 아직 그 연구가 미미한 상태이고 그리드의 특성상 기존의 플랫폼에서 취해왔던 방식이 그대로 적용되기 어려운 점이 있다. 본 논문에서는 그리드 환경에 적합하도록 분산 어카운팅을 제공하고 각 사이트의 자율성을 보장할 수 있는 어카운팅 플랫폼을 설계하였다.

• Journal of The Geomorphological Association of Korea
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• v.26 no.4
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• pp.97-106
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• 2019

This study aims to investigate geomorphological and geological landscapes in the Taeanhaean National Park to ensure they are well-preserved. This study discovered 390 geomorphological and geological landform resources distributed in the coastal zone of Taeanhaean National Park. Representative geomorphological and geological landforms include : sea cliffs, sea caves, wave-cut platforms, sea-stacks, pebble beaches, sand beaches, tidal flats, coastal dunes, coastal dune wetlands and folds (or micro folds) landforms. Deposition landforms are developed more and erosion and weathering landforms are less on the land zone than island zone. These landform resources vary from district to district and can be developed for geo-tourism resources. Combined efforts from the Taeanhaean National Park authorities and residents are essential to manage ecological programs using geomorphological and geological resources.

• Journal of the Korean association of regional geographers
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• v.15 no.2
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• pp.250-260
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• 2009

The purpose of the research is to investigate the possibility of the tourism resources development preference of sport leisure event activity of participation as one use MDS and clustering market character. An empirical research has been undertaken the questionnaire had be distributed to the whole country inline marathon races participation and there were 330 responses. The research was conducted by using statistical packages of SPSS program. As research methods factor analysis and cluster analysis were also employed. Three distinct cluster groups were categorized by their characteristics: 'money acquirement participation', 'self realization moderators', 'self realization enthusiasts', and there was differences among segmented groups in terms of their affecting factors to the tourism resources development preference. These findings suggested that there were need to tourism resources development for different segmented groups of sports leisure event activity selection attributes and each group pursued different satisfaction.

• Journal of the Korean Geographical Society
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• v.51 no.1
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• pp.57-75
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• 2016

University has various resources such as intellectual human resource, spatial resource and facilities, and economic resource. At the same time, universities are, in general, found upon fundamental mission of public service, as well as teaching and research. Recently in Korea, it has been argued that we should make use of such resource of universities in the process of urban regeneration through university-community partnership. Yet, these arguments are lack of concreteness: 'which' kind of resource for 'what' kind of problem, and 'how'. Therefore, this research examined the case of university-community partnership in Japan and tried to find of some implications to Korean society. The reason for examining Japanese case is because Japan has experienced similar problems that Korea face such as aging population, decrease in the number of student, deteriorations of existing urban area; there are respectable amount of similarities between Japan and Korea in political, social and economic context; and because Japan has proceeded regeneration of communities through university-community partnerships.

• The Journal of Korean Association of Computer Education
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• v.11 no.5
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• pp.67-76
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• 2008

Grid computing has a large scale virtual computing environment that enables a collaborative processing through sharing resources of geographically distributed organizations. In recent year, the development of wireless networks and mobile devices enables mobile devices to consider as a resource of the grids. However, there are some problems such as low performance of processors, small capacity of storages, limited capacity of battery, and low bandwidth. In this paper, to overcome these limitations occurred in mobile grid environments, we proposed a proxy-based mobile grid system. Our proposed system enables mobile devices to play roles as a resource consumer and a resource provider and to collaborate with wired grids through a mobile router. Also, we propose an adaptive job scheduling scheme to cope with context changes of mobile devices and compare our scheduling scheme with other scheduling schemes using a simulation tool, SimGrid, to verify the validity of our job scheduling scheme.

• Journal of Advanced Marine Engineering and Technology
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• v.39 no.9
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• pp.973-980
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• 2015

With their wide geographical distribution, unconventional resources are continuously compared against conventional resources, but their development is expanding because TRRs (Technical Recoverable Resources) are similar to conventional resources. In particular, there is active development of unconventional gas resources such as shale gas, tight gas, CBM (coalbed methane) and gas hydrate. However, it is difficult to calculate the material properties of unconventional resources, especially the gas content, with current geophysical logging technology. Additionally, some overseas companies have monopolies on related equipment and materials. Therefore, this study developed a reservoir PCS (Pressure Core Sampler). It can collect core samples without gaseous loss by maintaining high pressure from the moment the core is sampled and record pressure and temperature in real time. Successful performance testing was also carried out for official verification of the manufactured PCS. The reservoir PCS will contribute to the acquisition of geophysical well logging data as well as accurate and reliable cores.

• Journal of the Korea Society of Computer and Information
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• v.16 no.7
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• pp.13-23
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• 2011

Grid computing is a new generation computing technology which organizes virtual high-performance computing system by connecting and sharing geographically distributed heterogeneous resources, and performing large-scaled computing operations. In order to maximize the performance of grid computing, job scheduling is essential which allocates jobs to resources effectively. Many studies have been performed which minimize total completion times, etc. However, resource costs are also important, and through the minimization of resource costs, the overall performance of grid computing and economic efficiency will be improved. So in this paper, we propose a multi-objective job scheduling model considering both time and cost. This model derives from the optimal scheduling solution using NSGA-II, which is a multi objective genetic algorithm, and guarantees the effectiveness of the proposed model by executing experiments with those of existing scheduling models such as Min-Min and Max-Min models. Through experiments, we prove that the proposed scheduling model minimizes time and cost more efficiently than existing scheduling models.

• Journal of KIISE
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• v.42 no.5
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• pp.573-579
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• 2015

Nationwide supercomputing infrastructures in Korea consist of geographically distributed supercomputing clusters. We developed High-Throughput Computing as a Service(HTCaaS) based on these distributed national supecomputing clusters to facilitate the ease at which scientists can explore large-scale and complex scientific problems. In this paper, we present our mechanism for dynamically managing computing resources and show its effectiveness through a case study of a real scientific application called drug repositioning. Specifically, we show that the resource utilization, accuracy, reliability, and usability can be improved by applying our resource management mechanism. The mechanism is based on the concepts of waiting time and success rate in order to identify valid computing resources. The results show a reduction in the total job completion time and improvement of the overall system throughput.

• Journal of the Korean Association of Geographic Information Studies
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• v.11 no.3
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• pp.107-117
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• 2008

Numerous debates and efforts have been made to utilize land resources more effectively especially for the state-owned land in an urban area. Currently most of small size state-owned lands within urban areas are not used effectively due to the limitations in physical conditions and profitability. Some of these properties are occupied illegally and being used for various private purposes. Considering the shortage of land supply in urban areas, there need to be some improvements in the utilization and management of public land. The purpose of this study, therefore, is to identify and evaluate the location, current uses, physical conditions, and development potential of small size public properties in Seoul area. Data analysis was conducted by using GIS. The results of the study indicate that it is possible to utilize small size state-owned lands within an urban area more rationally and systematically by evaluating the characteristics of neighborhood and the site.