• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2004년도 춘계종합학술대회
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• pp.739-743
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• 2004

그리드 VO(Virtual Organization)는 내부 규정과 정책의 집합에 의하여 제어되는 기존의 VO 개념에서 벗어나 그리드 환경의 특성을 반영하고 임시적, 동적 기반의 자원 공유와 협업을 지원하기 위해서 개인 또는 기관, 시스템 자원이 모이도록 규격화된 임시적인 VO이다. 본 논문에서는 그리드 VO 구성에서 자원을 할당할 경우에 발생할 수 있는 보안 문제 중 인증과 관련된 문제를 해결하고자 XML 정보보호기술을 토대로 경량화 된 그리드 VO 인증 시스템을 제안하였다. 본 논문에서 제안한 그리드 VO상의 자원에 대한 인증 시스템은 기존 인증 서비스 구성을 위한 PH 기반 시스템에 그리드 VO를 구성하는 자원 인증 모듈을 중간 관리 시스템으로 포함하는 유형을 포함하고 있으며, 동적으로 변하는 그리드 VO에서의 자원에 대한 효율적인 인증 서비스를 제공할 수 있다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 춘계학술대회 논문집
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• pp.658-659
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• 2009

In this study, fluid-induced vibration (FIV) analyses have been conducted for tall building structure. In order to investigate the aeroelastic responses of tall building due to wind load, advanced computational analysis system based n computational fluid dynamics(CFD) and computational structural dynamics (CSD) has been developed. Fluid domains are modeled using the computational grid system with local grid deforming technique. A fully implicit time marching scheme based on the Newmark direct integration method is used for computing the coupled aeroelastic governing equations of tall structure for fluid-structure interaction (FSI) problems. Detailed aeroelastic responses and results are presented to show the physical phenomenon of the tall building.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1999년도 봄 학술발표회 논문집
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• pp.86-93
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• 1999

구조 설계지원 시스템의 최종적인 목표는 설계의 진행 시, 수없이 발생하는 선택의 과정이 구조물 품질 향상의 방향으로 이루어 질 수 있도록 하는 것이다. 이를 위해서는 두 가지의 해결 방안이 필수적이다. 하나는 구조 설계지원 시스템이 담당해야 하는 설계영역을 고객의 요구조건으로부터 최종 해결안을 도출시키는 차원까지 확대시켜야 하며, 두 번째는 품질을 정의하는 구조물의 성능이 다양하면서 서로 상반되기 때문에 이들을 동시에 만족시켜줄 수 있는 방안을 모색해야 한다는 점이다. 본 논문에서는 이러한 문제점을 해결할 수 있는 구조 설계지원시스템을 특히 Grid-like 타입의 구조물에 관하여 논의하고자 한다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(3)
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• pp.115-118
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• 2002

This paper designs Accounting structure for local users to policy base in Grid environment that integrate distributed Supercomputing resources geographically. Policy base virtual user Accounting system controls unnecessary increase of discrete Computing each local Accounting information. Also, This paper described method to manage do resources of each local system to policy base and presented way to process expense cost when used resources.

• 건축역사연구
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• 제33권1호
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• pp.19-31
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• 2024

Jinhae is the oldest Western-style radial and grid city on the Korean Peninsula, and it also has the most defined structure to date, remaining largely unchanged and unlike any other in Korea. The Jinhae town plan was completed immediately after the signing of the Japan-Korea Treaty. Although the city of Jinhae was built by the Japanese, its overall organizational principle is clearly a radial-grid form that was established in the West. The Jinhae radial-grid planning was elaborately constructed with multiple layers of overlapping structures. It is the result of the application of geometry that creates symmetry and hierarchy in European countries, and the simultaneous consideration of road hierarchy and land form in the process of combining radial and grid forms. To reveal these points, four analyses are performed. First, the formation process of Western radial and grid streets is reviewed and compared to derive review points for Jinhae City. Second, the layout and geometric characteristics of radial streets are discussed. Third, the hierarchical characteristics and connections of grid streets are analyzed. The last part is a comparative analysis of the plan and the final realization.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2010년 춘계학술대회논문집
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• pp.524-529
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• 2010

In the present study, a CFD program is developed for the Fluid-Structure Interaction(FSI) analysis. The non-staggered, non-orthogonal, and unstructured grid system was also used to handle the complicated geometries in the program. In order to validate the capabilities of the developed CFD program, various models are investigated by using unstructured and nonorthogonal meshes. The predicted results are a good agreement with analytic solution, experimental data and commercial software. And also PISO algorithm is applied for transient flow analysis. The cyclic boundary condition and baffle cell are developed in order to improve the effectiveness of the calculation for complex geometry.

• 한국전기전자재료학회논문지
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• 제21권4호
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• pp.381-387
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• 2008

Neutron production rate in spherically convergent beam fusion(SCBF) device as a portable neutron source strongly depends on the ion current and the grid cathode structure. In this paper, as the process of design and analysis, Design of Experiment(DOE) based on the results by Finite Element Method-Flux Corrected Transport(FEM-FCT) method is employed to calculate the ion current. This method is very useful to find optimal design conditions in a short time. Number of rings, radius of rings, and distance between the grid cathode and center are selected as control factors. From the results in the optimized model, the higher ion current is calculated and deeper potential well is also observed.

• Structural Engineering and Mechanics
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• 제40권6호
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• pp.801-811
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• 2011

A new experimental technique was developed on the plate-inserted welded tubular joints of spatial grid structures. In the experimental technique, a microcomputer controlling instrument of moire intervention (MCIMI) was adopted. A test was designed on the plate-inserted welded tubular joints of spatial grid structures to show the effectiveness of the MCIMI technique. Both traditional electrical measuring technique and MCIMI technique were employed in the test. The test results showed that the MCIMI technique was feasible in the case of the complicated tests on steel structures. The MCIMI technique not only implemented the limitation of traditional electrical measuring technique, but also improved the accuracy of the test. According to the test results, we further examined the plate-inserted welded tubular joints in the cable-stayed spatial grids of the Binhai International Convention & Exhibition in Tianjin, China. The analysis showed the joints are safely designed with adequate conservatism. The research provided a new application of MCIMI in the field of large-scale structure engineering.

• 정보처리학회논문지D
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• 제15D권2호
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• pp.285-296
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• 2008

본 연구의 목적은 IT 전략그리드의 4개 전략 모드에 대해서 IT 거버넌스 의사결정 구조를 살펴보고, 높은 성과를 내는 기업과 낮은 성과를 내는 기업 간의 IT 거버넌스 의사결정 구조의 차이를 비교 및 분석하는 것이다. 본 연구를 위해 설문방법을 이용하였고, 분석을 위한 데이터는 KOSDAQ 300, KOSPI 200의 상장 기업을 대상으로 수집한 총 209개의 데이터를 적용하였다. 그 결과, 각 모드는 서로 상이한 IT 거버넌스 의사결정 구조를 가지는 것으로 나타났고, 높은 성과를 내는 기업과 낮은 성과를 내는 기업 간의 IT 거버넌스 의사결정 구조도 각 모드별로 상이한 결과를 보였다. 본 논문의 결과는 IT 거버넌스를 실행하는 기업들의 바람직한 행위를 촉진하기 위한 의사결정구조의 틀을 각 전략 모드별로 제시하였다는 점에서 의의가 있다.

• Journal of Electrical Engineering and Technology
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• 제10권1호
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• pp.102-108
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• 2015

This paper proposes a new fault isolation methodology for a smart protective device which plays an agent role on the smart grid distribution system with the distributed generation. It, by itself, determines accurately whether its protection zone is fault or not, identifies the fault zone and separates the fault zone through the exchange of fault information such as the current information and the voltage information with other protective devices using bi-directional communication capabilities on the smart grid distribution system. The heuristic rules are obtained from the structure and electrical characteristics determined according to the location of the fault and DG (Distributed Generation) when faults such as single-phase ground fault, phase-to-phase short fault and three-phase short fault occur on the smart grid distribution system with DG.