• Journal of KIISE:Computing Practices and Letters
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• v.15 no.4
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• pp.255-259
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• 2009

In this paper, we present AGE(Automatic Grid Environments), which is a middleware system in which Grid resources can automatically participate in a Grid environment. While other existing systems need the configuration of each Grid node to deploy a Grid environment, AGE offers automatic installation and execution of necessary middleware for participating in a Grid environment. And Grid applications in AGE do not need to be pre-installed and pre-configured. When an application is to be executed in participating Grid nodes, this system can download, install, and execute the application automatically. Therefore, AGE provides users with convenience such as deploying a Grid environment, executing the application, and releasing nodes or resources from the Grid environment automatically.

• The Journal of Korean Association of Computer Education
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• v.9 no.6
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• pp.89-98
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• 2006

Recently, grid computing environment has being changed to the service-oriented grid integrated with Web Services. In this architecture, there is the service-oriented grid application in which Grid Services are executed according to the workflow of the grid application. This implies that the grid scheduling method needs to consider grid service characteristics. Therefore, we propose the grid service performance model based on factors such as service availability, accessibility, reliability, throughput, and slowdown, and develop service scheduling method to increase performance of the service-oriented grid application.

• 한국전산유체공학회:학술대회논문집
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• 2006.05a
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• pp.107-112
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• 2006

A wind tunnel simulation requires high-performance computing power like supercomputers and deep knowledge of this subject. Those requirements make win tunnel simulation difficult. Grid technology will make these difficulties simpler by providing easy to use grid web portal. By using grid web portal, scientist can execute simulation and access to high-performance computing power without any serious difficulties. In this paper will present a grid web portal for a wind tunnel simulation that is used in Aerospace area.

• Journal of Electrochemical Science and Technology
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• v.13 no.4
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• pp.472-478
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• 2022

Solar energy harvesting is practiced by various nations for the purpose of energy security and environment preservation in order to reduce overdependence on oil. Converting solar energy into electrical energy through Photovoltaic (PV) module can take place either in on-grid or off-grid applications. In recent time Lithium battery is exhibiting its presence in on-grid applications but its role in off-grid application is rarely discussed in the literature. The preliminary capacity and Peukert's study indicated that the battery quality is good and can be subjected for life cycle test. The capacity of the battery was 10.82 Ah at 1 A discharge current and the slope of 1.0117 in the Peukert's study indicated the reaction is very fast and independent on rate of discharge. In this study Lithium Iron Phosphate battery (LFP) after initial characterization was subjected to life cycle test which is specific to solar off-grid application as defined in IEC standard. The battery has delivered just 6 endurance units at room temperature before its capacity reached 75% of rated value. The low life of LFP battery in off-grid application is discussed based on State of Charge (SOC) operating window. The battery was operated both in high and low SOC's in off-grid application and both are detrimental to life of lithium battery. High SOC operation resulted in cell-to-cell variation and low SOC operation resulted in lithium plating on negative electrode. It is suggested that to make it more suitable for off-grid applications the battery by default has to be overdesigned by nearly 40% of its rated capacity.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.71-74
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• 2011

2030년까지 한국에 Smart Grid를 구축할 계획을 가지고 추진하고 있다. Smart Grid는 지능형 전력망으로 기존의 전력망에 IT를 접목시켜 통신을 실시하여 양방향성을 가지게 된다. 기존의 전력망에 부가될 IT전기기기들은 기존에 IT가 지니고 있는 취약점들이 있어 기존의 Smart Grid공격에 노출되어 있다. 본 논문에서는 한국보다 먼저 구축되어서 활용되고 있는 미국의 Smart Grid에 대한 공격사례를 분석한다. 그리고 한국 Smart Grid에 대한 전기IT기기의 취약점을 분석하여, 한국 Smart Grid에 대한 예상 공격을 분석하고, 보안 대책을 제시한다. 본 논문은 한국 Smart Grid에 안정성과 보안성을 갖춘 기술 자료로 활용할 것이다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.1
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• pp.172-182
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• 2008

Application Contents of based on a workflow process unit in grid system is a practical work to solve the problem. To construct cooperation environment is very important because the contents are deployed and executed. And the most of cooperation is executed by workflow. Globus toolkit is the middleware for cooperation process in grid environment. However the middleware only provides basic services for constructing grid, not workflow that can provides cooperation, job scheduling, application contents management. Also Globus toolkit is suitable for huge gird community but small size pc based grid community. Therefore, this paper proposes the efficient application contents deployment system for small sizes cooperation. This system supports efficient cooperation environment with Application contents deployment and resource management provided in grid community. Also it presents information and association relation among application contents with association dictionary among application contents based on workflow process unit, and utilizes this as information for application contents deployment.

• Journal of the Korea Society of Computer and Information
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• v.13 no.3
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• pp.65-75
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• 2008

Grid Computing has enabled enormous amount of computational jobs by connecting distributed computing resources. This technology has developed and widely used in various fields. Previous researches usually focused on how to efficiently manage and use the grid resources. However, there was not enough tries to understand and manage information of application softwares in a well-defined structure. Therefore users in application domain need to how about grid deeply to identify and describe the resource requirements matching for each jobs. We introduce a semantic grid management system based on application ontology to overcome this problem. We design and implement the ontology to store various information of the applications. With the ontology, this system can infer the resource requirements from input parameters and input data of the application software and automatically assign appropriate resources by matching the requirement. Also it can transform the information to other forms which grid middlewares can handle. We apply the system to construct an analysis environment of bioinformatics and compare it with other grid systems to explain usefulness of the system.

• 한국전산유체공학회:학술대회논문집
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• 2001.10a
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• pp.164-173
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• 2001

Advanced countries centered by National Supercomputing Center are inclined to construct Grid Infra and develop key applications in high performance computing field. They are also trying to globalize the Grid project aided by research groups in nations and continents. Computing technology and application development in Grid computing environment become indirect capital of high performance computing and information technology. Therefore, Korean government would like to participate in their Grid construction and application development actively and pursue to Grid project to develop Grid industries such as IT, BT. next five years.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.101-104
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• 2011

지능형 전력망인 Smart Grid의 등장으로 미국, 일본 등의 국가는 Smart Grid 시장을 선점하기 위해 노력하고 있다. 한국 또한 경쟁국으로서 G20 정상회의에서 Smart Grid 시범 단지를 선보이려고 준비 중에 있다. Smart Grid의 발전에 기본적인 전력기기와 IT기기의 융합 모델인 전력IT기기의 연구가 진행되고 있고, 단일 전력 기기일 때와는 달리 IT 기기의 특성에 따른 보안 문제에 노출되어 보안에 대한 연구가 필수적이다. 본 논문에서는 Smart Grid에 사용되는 전력 IT 기기에 적용 할 수 있는 보안 방법인 BlackList 설정을 연구하여 Smart Grid 시대의 발전에 기여 할 것이다.

• 한국가시화정보학회:학술대회논문집
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• 2003.11a
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• pp.55-58
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• 2003

In this paper the numerical method with a zonal embedded grid system for an incompressible flow within a circular container is presented. The algorithm is validated by its application to some typical flow models including the spin-up flow inside a half-circle geometry.