• 산업공학
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• 제17권3호
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• pp.359-374
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• 2004

The objective of this paper is to provide an improved reorder decision policy for general multi-echelon distribution systems utilizing the shared stock information. It has been known that traditional reorder policies sometimes show poor performance in distribution systems. Thus, in our previous research we introduced the order risk policy which utilizes the shared stock information more accurately for the 2- echelon distribution system and proved the optimality. However, since the real world supply chain is generally composed with more than 2 echelons, we extend the order risk policy for the general multi-echelon systems. Since the calculation of the exact order risk value for general multi-echelon systems is very complex, we provide two approximation methods for the real-time calculation. Through the computational experiment comparing the order risk policy with the existing policies under various conditions, we show the performance of the order risk policy and analyze the value of the shared stock information varying with the characteristics of the supply chain.

• 한국도서관정보학회지
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• 제33권4호
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• pp.241-259
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• 2002

이 연구는 6개 사립대학 도서관으로 구성된 부산·경남지역 대학도서관 정보교류협의회의 외국학술잡지 분담수서시스템 운영 실태를 분석하였다. 먼저 분담수서의 이론적 배경을 살펴보았으며, 그리고 이 협의회가 운영하는 분담수서시스템의 개발과정, 운영방법, 현황을 조사하고 분석하였고 이를 바탕으로 그 효과 및 문제점과 유용성을 규명하였다.

• 한국정보시스템학회지:정보시스템연구
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• 제25권1호
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• pp.135-158
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• 2016

Purpose Virtual communities change the way people communicate and share information. The purpose of this paper is to find how internet social capital and individual motivations influence the information sharing in virtual communities. This study considers the social capital theory, individual motivations, information sharing, and community promotion to construct a theoretical model. Design/methodology/approach Social capital focuses on three dimensions that include 6 factors: social interaction ties, centrality, shared language, shared vision, trust and reciprocity. Individual motivations include 2 factors: reputation and enjoy helping. To confirm the research model and the hypotheses, 426 effective questionnaires were used for the final analysis. Findings The result of data analysis demonstrates that social interaction ties, centrality, shared language, trust, and reciprocity were significant in affecting information sharing behaviors. However, reputation, enjoy helping, and shared vision does not appear to have a significant influence on information sharing behaviors. The information sharing was positively related to community promotion.

• 정보처리학회논문지C
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• 제18C권6호
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• pp.389-396
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• 2011

최근 들어 현재의 인터넷에서 널리 사용되고 있는 서비스 제공자 중심적인(service provider-centric) 고립형(isolated) 인증 모델의 사용자 편의성 부족, 고비용 구조, 그리고 프라이버시 보호 어려움 등의 문제를 해결하기 위해 단일 사인온(single sign-on) 기반의 공유 인증에 대한 연구가 활발하게 진행되어 왔다. 인증 제공자(authentication provider)의 인증 결과가 다수의 인터넷 서비스 제공자(service provider)에 의해 공유되는 공유 인증(shared authentication) 모델이 실제 인터넷 환경에 적용되기 위해서는 사용자, 서비스 제공자, 그리고 인증 제공자간의 인증 보증 수준(level of authentication assurance)과 인증 정보 보호 수준(level of authentication information protection)에 대한 신뢰가 매우 중요하다. 본 논문은 사용자 중심적인(user-centric) 동작과 개방형 신뢰 제공자 네트워크(trust provider network)와 결합된 신뢰적이고 프라이버시 보호가 가능한 공유 인증 프로토콜에 대한 프레임워크를 제시한다. 제안된 공유 인증 프로토콜 프레임워크는 상호동작 가능한 개방형의 신뢰적인 인증 서비스를 제공함으로써 기존 공유 인증 연구들과 차별화된다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2012년도 추계학술발표대회
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• pp.197-199
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• 2012

최근 GPU 의 뛰어난 부동 소수점 연산 능력을 활용하여 그래픽 이외에 다양한 응용 프로그램들의 병렬화 및 성능최적화가 활발하게 이루어지고 있다. 이러한 GPU 의 성능을 극대화하기 위해서는 메모리 계층구조 및 shared memory 를 비롯한 on-chip 메모리의 사용을 최적화하는 것이 필수적이다. 본 논문에서는 이러한 shared memory 의 사용을 최적화하기 위한 기법들을 제안하고, 이를 패턴 매칭 응용 프로그램에 적용하여 효용성을 검증한다.

• 한국의류산업학회지
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• 제6권6호
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• pp.699-706
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• 2004

In today's fashion industry, directions for new products and high value added of fashion goods, product changes according to cycles, the shortening of life cycles, added value, planned obsolescence, and presentation is focused on fashion trends that will be selected by many consumers at the point of selling time. Therefore fashion information poses great importance and its weight is growing bigger everyday. Fashion information recognized to be important is reflected practically in the prediction of fashion changes in the fashion industry; especially, it is the first stage of the merchandising process that is the course of new product development. Presently, with some differences according to the size and specialized area of a firm, domestic fashion menufacturers obtain information from sales data of competing brands and their own, market information, consumer information based on primary data, shared fashion trend information given by domestic fashion information providing companies. Firms can not produce differentiated images and product concepts using such shared information. Although the types, importance and reflection of used information vary according to merchandising processes, all experts engaging in the merchandising of fashion products use the same shared information.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 1999년도 춘계공동학술대회-지식경영과 지식공학
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• pp.95-102
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• 1999

The web-based group collaborative systems are emerging as enterprise-wide information systems. Since data in group collaborative systems are apt to be shared among multiple concurrent users and modified simutaneously by them, the web-based group collaborative systems must support synchronous collaboration in order to provide users with synchronized and consistent views of shared data. This paper proposes an active web server which can facilitate synchronous collaboration in web-based group collaborative systems. To accomplish such a goal, the active web server manages dependency relationships between shared data and web browsers referencing them and actively propagates changing details of the shared data to all web browsers referencing them. And, this paper examines usefullness and effectiveness of the active web server to apply it to the ball-bearing design example of concurrent engineering design systems. The prototype system of the active web server is developed on a commercial Object-oriented Database Management System (ODBMS) called OBJECTSTORE using the C++ programming language.

• Journal of the Korean Data and Information Science Society
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• 제20권3호
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• pp.467-474
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• 2009

시스템의 한 부품이 고장 나면 고장 난 부품이 분담하던 부하가 고장 나지 않은 다른 부품에 전가되어 다른 부품의 고장률에 영향을 주는 부하분배시스템에 대한 연구가 신뢰성 공학과 생물의학 분야에서 다양하게 이루어져왔다. 본 연구에서는 최소수명을 보증하는 부하분배체계의 체계단위수명 시험에서 부품의 수명관측이 불가능하며 체계의 수명관측이 가능한 경우에, 중도절단된 체계 고장데이터를 이용하여 부하분배체계의 평균수명과 체계 신뢰도의 최우추정치와 추정오차를 줄일 수 있는 수정된 최우추정치를 구하고 컴퓨터 모의실험을 통하여 그 성능을 비교한다.

• 한국정보처리학회논문지
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• 제6권5호
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• pp.1253-1262
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• 1999

For the efficient co-authoring of multimedia documents in a distributed systems environment, the cooperative-work management systems that can not only allow the sharing of distributed resources but also facilitate the authors' interaction, are needed. In this paper, we present a cooperative-work management system with hybrid architecture, called CW-MAN, in which the information on shared objects and co-authoring management is stored in a dedicated computer system but the shared objects distributed all over the local computer systems. The main management functions provided by the CW-MAN are those for shared objects, session, and telepointing. The shared-object use them exclusively. The session managements allows authors to dynamically create, update, and destroy sessions. Lastly, the telepointing management allows local pointing events to be synchronously presented to remote systems.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 하계종합학술대회논문집
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• pp.251-254
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• 1998

This paper suggests two data exchange protocols (DEPs) using shared memory. They support reliable data exchanges among components which are located in the same rack and use the same backplane bus and shared memory.