• 디지털콘텐츠학회 논문지
• /
• 제14권2호
• /
• pp.171-178
• /
• 2013

데스크톱 그리드 컴퓨팅은 이질성과 휘발성을 갖는 데스크톱 자원을 활용하여 대용량의 컴퓨팅 작업을 수행한다. 그러나 이러한 컴퓨팅 환경에서는 서로 다른 성능을 갖는 데스크톱 자원의 연산 참여와 이탈이 자유롭기 때문에 연산 수행의 안정성과 신뢰성을 보장하지 못한다. 따라서 본 논문에서는 데스크톱 그리드 컴퓨팅에 연산 수행의 안정성과 신뢰성을 제공하기 위한 방안으로 k-means 클러스터링 알고리즘을 이용한 자원 그룹핑 기법을 설계한다. 아울러, 실제 데스크톱 그리드 시스템의 연산 수행 로그 데이터에 기반하여 자원 그룹핑을 수행하고, 데스크톱 자원 그룹에 대한 결함포용으로의 적용 방안을 제시한다.

• 한국시뮬레이션학회:학술대회논문집
• /
• 한국시뮬레이션학회 2003년도 추계학술대회 및 정기총회
• /
• pp.185-192
• /
• 2003

Digital Manufacturing-based production could be very effective in shipbuilding in order to save costs and time, to increase safety for workers, and to prevent bottleneck processes in advance. Digital shipbuilding system, a simulation-based production tool, is being developed to achieve such aspects in Korea. To simulate material flow in a subassembly line at a shipyard, the product, process and resources was modeled for the subassembly process which consisted of several sub-processes such as tack welding, piece alignment, tack welding, and robot welding processes. The analysis and modeling were carried out by using the UML(Unified Modeling Language), an object-oriented modeling method as well as IDEF(Integration DEFinition), a functional modeling tool. Initially, the characteristics of the shop resources were analyzed using the shipyard data, and the layout of the subassembly line was designed with the resources. The production process modeling of the subassembly lines was performed using the discrete event simulation method. Using the constructed resource and process model, the productivity and efficiency of the line were investigated. The number of workers and the variations In the resource performance such as that of a new welding robot were examined to simulate the changes in productivity. The bottleneck process floated according to the performance of the new resources. The proposed model was viewed three-dimensionally in a digital environment so that interferences among objects and space allocations for the resources could be easily investigated

• 한국문헌정보학회지
• /
• 제53권3호
• /
• pp.25-43
• /
• 2019

디지털 자원의 급속한 증가에 따라 디지털 보존 및 디지털 큐레이션에 대한 관심이 높아지고 있다. 이 연구는 디지털 보존과 디지털 큐레이션과 관련된 국외논문과 미국, 영국, 아일랜드, 캐나다, 뉴질랜드의 대학 기록관리 과정의 교과를 대상으로 제목 키워드 프로파일링 기법 및 네트워크 분석을 통해 논문 및 교과의 핵심 주제영역을 도출하고 논문 및 교과의 내용을 살펴보고자 하였다. 분석결과 논문 및 교과의 핵심 주제영역은 논문은 아카이브 시스템 영역, 교과는 큐레이션 교육 및 업무 영역이 주요 영역으로 나타났다. 논문 및 교과 내용분석에 있어서는 논문에서는 전략설계, 교과에서는 기록관리업무가 주요 내용으로 나타났으며 공통적으로 디지털 자원의 포맷이 중요한 이슈로 출현하였다.

• 디지털융복합연구
• /
• 제9권1호
• /
• pp.25-36
• /
• 2011

This paper examines user's loyalty to social network sites (SNS) from switching costs (SC) incurred by both technology and social factors. We propose a research model specifying that the perceived values of resources of the factors affect the SC and the SC determine user's loyalty. Empirical results show that technology variables of ease of use and privacy controllability, and social variables such as network size, usefulness of SNS activities, and awareness of network status have significant effect on SC. In particular, ease of use is negatively associated with SC. Since it is shown that in overall the impact of social factors is stronger than that of technology factors, we can interpret that technological superiority itself does not lead to the success of SNS. Contributions of this paper are: 1) application of SC in SNS research from the resource based perspective, which can be used for developing strategies of sustainable SNS, and 2) provision of different perspective toward the variable of ease of use, which has been considered an important factor of technology acceptance.

• 디지털산업정보학회논문지
• /
• 제9권1호
• /
• pp.1-7
• /
• 2013

The cloud computing is technology which gives flexible and solid infrastructure to IT environment. With this technology multiple computing environment can be consolidated in to a single server so that maximize system resource utilization. Better processing power can be achieved with less system resource. IT manager can cope with increasing unnecessary cost for additional server and management cost as well. This means a enterprise is able to provide services with better quality and create new services with surplus resource. The time required for recovery from system failure will be reduced from days to minutes. Enhanced availability and continuity of enterprise business minimize the codt and the risk produced by service discontinuity. In this paper, we propose framework architecture that is strong against denial-of-service attack.

• 한국통신학회:학술대회논문집
• /
• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
• /
• pp.468-468
• /
• 2006

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
• /
• 제13권5호
• /
• pp.311-319
• /
• 2007

오늘날 데이타방송은 멀티미디어로 구성된 다양한 콘텐츠를 사용자들에게 제공한다. 본 본문은 이러한 멀티미디어 교통정보를 데이타방송으로 제공할 때 실시간서비스의 제약요소 가운데 하나인 콘텐츠의 수신시간을 줄이기 위하여 콘텐츠를 구성하는 멀티미디어 자원을 제어하는 하나의 자원관리시스템(Resource Management System)을 제안한다. 우리는 제안된 자원관리시스템의 효율성을 검증하기 위하여 먼저 지상파 DMB(T-DMB : Terrestrial Digital Multimedia Broadcasting)에서 멀티미디어 데이타를 전송하는 MOT(Multimedia Object Transfer)프로토콜 기반의 BWS(Broadcast Web Site)데이타방송으로 교통정보를 실시간 제공하는 교통정보의 통합시스템과 저작시스템을 소개하고, 이 시스템들과 연동하여 멀티미디어 자원생성을 관리하는 자원관리시스뎀을 구현하였다. 실험을 통하여 구현된 자원관리시스템의 자원을 이용하여 저작된 콘텐츠는 수신시간이 이전보다 약 1/13 줄어들었기 때문에 실시간 데이타방송에 적합하다.

• 한국CDE학회논문집
• /
• 제10권3호
• /
• pp.210-216
• /
• 2005

Digital manufacturing could be very effective in shipbuilding in order to estimate the process time, to improve the operation efficiency, and to prevent bottleneck processes in advance. The subassembly process having done research consists of piece arrangement, tack welding, robot welding, manual welding and so on. The robot welding of them was the focus of the simulation. The analysis and modeling were carried out by using UML (Unified Modeling Language) as well as $IDEF\phi$ (Integration DEFinition). The characteristics of the process resources were analyzed using the shipyard data, and the layout of the subassembly line was designed with the resources. Using the constructed resource and process model, the productivity and efficiency of changed robot welding stage were investigated. It was simulated how much the variations in the resource performance have influence on improvement of productivity. One of the important outputs in this simulation was the cycle time during a certain period's work. The cycle time prediction was also undertaken for the different torch and the different piece arrangement. The proposed model was established three-dimensionally in a digital environment so that interferences among objects and space allocations for the resources could be easily investigated.

• 디지털융복합연구
• /
• 제14권10호
• /
• pp.303-310
• /
• 2016

인터넷의 경직성으로 인하여 다양한 서비스를 제공하기 어려운 문제를 해결하기 위한 가장 효과적인 방법이 네트워크 가상화 방안이다. 공통의 물리 네트워크 자원을 공유하는 가상 네트워크를 효율적으로 생성하기 위해서는 자원을 효율적으로 사용할 수 있는 방안이 필요하다. 이러한 한정된 물리 자원을 효율적으로 사용하기 위하여 본 논문에서는 사용중인 자원이라도 더 높은 서비스 우선순위를 갖는 가상 네트워크에 할당하는 방법을 제안한다. 높은 우선순위의 네트워크 생성 요청을 위하여 운용중인 낮은 우선순위의 가상 네트워크에서 효율적으로 대역폭을 회수하는 알고리즘을 제안한다. 제안하는 대역폭 할당 알고리즘은 낮은 우선순위를 갖는 가상 네트워크에서 서비스 지속성을 유지하면서 할당된 대역폭을 회수할 수 있다. 제안한 알고리즘의 실험을 통하여 약 8%정도의 가상 네트워크 생성 수락률의 향상을 확인하였다.

• 디지털산업정보학회논문지
• /
• 제14권1호
• /
• pp.87-101
• /
• 2018

The purpose of this study is to develop the measuring instruments for evaluation criteria for Malcolm Baldrige National Quality Award(MBNQA), suitable for ICT Industries, and to analyze the cause-effect relationship between those criteria through aforementioned instruments. MBNQA is formed with seven categories: Leadership, Strategic planning, Focus on patients, other customers and markets, Measurement, analysis and knowledge management, Human resource focus, Process management and Results. As excluding the Human Resource Focus category, this study empirically examined the cause-effect relationship among six categories. In order to empirically examine the research model, this study calculated Cronbach's alpha and reliability index, thus examined the reliability and executed Exploratory Factor Analysis. Furthermore, Average Variance Extracted(AVE) is used to verify the discriminant validity. Lastly, the hypothesis testing was made complete through significance test on the paths between variables. The result of this study shows that both leadership and social responsibility have direct cause-effect relationship with Measurement, analysis and knowledge management, Human resource focus, Process management and also that this relationship has direct impact on Human resource focus, Measurement, analysis and knowledge management as well, consequently exerting influence on the result through Process management, Finance and Market data.