• 한국컴퓨터정보학회논문지
• /
• 제13권4호
• /
• pp.213-220
• /
• 2008

본 논문에서는 국가자격종합관리시스템 구축 및 운영의 효율성을 향상시키기 위하여 외부위탁 관리시스템과 연계한 실시간 자료공유 시스템을 설계하고 개발하였다. 현재까지 대부분의 국가자격 종합관리시스템은 IT 전문기업에 개발, 구현, 운영에 대한 전반적인 사항을 위탁으로 수행한 후, 처리 결과에 대한 정보를 인수받아 업무를 처리하였다. 이러한 처리방식은 전체적인 정보에 대한 재처리, 기능추가, 시스템 안정성 등에 많은 문제점을 가지고 있다. 제안된 실시간 자료공유 시스템의 성능평가를 위하여 기본적 시뮬레이션으로 파일럿시스템에서 제안 기술을 적용하여 검증 한 후 대한상공회의소 실시간 국가기술자격 시험에 적용한 결과 안정성이 입증되어 지방상공회의소까지 지속적으로 확대 적용할 계획이다. 국가자격종합관리 실시간 자료공유 시스템은 정보재처리와 부가기능 추가시 발생되는 개발기간에 대한 문제를 근본적으로 해결하였으며 안정적 시스템운영 상태와 최대 효율성을 보여주었다. 특히 국가자격시스템 내부관리자와 운영자에 대한 관리체계와 편리성에서 최상의 평가를 도출하였다.

• 한국전자거래학회지
• /
• 제4권3호
• /
• pp.1-24
• /
• 1999

Strategic alliance between corporations is essential to build a CALS system. Specially, companies cooperate one another to accomplish the shared environment in the system. During the construction of the CALS system, we can apply the concepts of ILS and SCM to develop the breadth and depth of shared environment between firms. In order to build such intended environment in the CALS system, we propose five dimensions with 30 variables to be considered. These dimensions are Information Sharing, Task Sharing, System Sharing, Parts and Facilities Sharing, and Institution Sharing. Structured interviews were peformed to measure the degree of shared environment designed in 7 CALS pilot systems in Korea. The results show that the level of the shared environment in the context of vertical relationships between firms in the CALS systems is fairly high. In contrast, the level of the sharing between competing companies in horizontal relationships is relatively low in most of the pilot systems.

• 디지털콘텐츠학회 논문지
• /
• 제15권1호
• /
• pp.11-18
• /
• 2014

우리나라는 강점인 초고속 통신망을 기반으로 전국적인 의료정보망을 구축하여 의료서비스의 질을 향상시키는 것이 필요하다. 그러나 의료서비스의 속성상 의무기록 서식이 병원, 진료 부서마다 특성화 되어 있어 모든 부서, 모든 질병에 사용할 수 있는 공통된 서식 완성이 매우 어려운 난제이다. 본 연구는 이를 개선하기 위한 하나의 방안으로 우선 의료정보 공유상의 문제인 의료정보시스템(PACS/HIS)간 정보연동 문제, 정보의 호환성, 보안성 문제를 도출하였다. 도출된 문제는 3개영역 6개 요구사항으로 정리된다. 이를 개선하기 위해서 의료정보의 효과적 공유를 목적으로 한 소프트웨어시스템 설계가 요구된다. 소프트웨어시스템 설계는 의료정보 이해관계자 도출, 설계 요구사항 분석, 소프트웨어 프레임워크 구성, 아키텍처 평가절차를 필요로 한다. 본 연구는 의료정보 표준화 환경 진단을 기반으로 시스템 설계로 새로운 설계사상을 기반으로 프레임워크를 도출하고 기능 메커니즘을 구성했다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제4권6호
• /
• pp.1237-1252
• /
• 2010

This paper proposes an intelligent technique for data sharing and event transition among personal devices including smart phones, laptops, and desktops. We implemented the PES (Personal Event Service) system that proactively executes appropriate tasks across multiple devices without explicit user requests by sharing the data used by the user and recognizing user intention based on the observed actions of the user for specific devices. The client module of PES installed on each device monitors the user actions and recognizes the intention of the user. The server provides data sharing and maintenance for clients. The connection between client and server is established by Java RMI (Remote Method Invocation). A series of experiments were performed to evaluate user satisfaction and system accuracy, and the results showed that the PES system can proactively provide appropriate, personalized services with a high degree of satisfaction to the user in an effective and efficient manner.

• 한국산업정보학회:학술대회논문집
• /
• 한국산업정보학회 2008년도 추계 공동 국제학술대회
• /
• pp.445-448
• /
• 2008

The key establishment between nodes is one of the most important issues to secure the communication in wireless sensor networks. Some researcher used the probabilistic key sharing scheme with a pre-shared key pool to reduce the number of keys and the key disclosure possibility. However, there is a potential possibility that some nodes do not have a common share in the key pool. The purpose of this paper is to devise a peer to peer key sharing protocol (PPKP) based on Quorum system and Diffie-Hellman key exchange scheme (DHS). The PPKP establishes a session key by creating a shared key using the DHS and then scrambles it based on Quorum system to secure that. The protocol reduces the number of necessary keys than the previous schemes and could solve the non-common key sharing possibility problem in the probabilistic schemes.

• 정보과학회지
• /
• 제5권1호
• /
• pp.04-10
• /
• 1987

本 論文은 단일 processor를 가진 computer time sharing system의 運用 에 關한 것이다. 서로 다른 K 종류의 task들이 各各 獨立的이고 time-homojeneous한 Poisson分布를 따라 System에 들어 오고 있다. 또한, task 가 配當된 quantum동안 process를 받고 난후 이미 주어진 確率에 의해, 써어비스 를 完了받고 System을 離脫하기도 하고, 未完結된 경우 다른 種類의 task로 바뀌 어져 다시 process를 받기 爲해 待期한다고 한다. 이러한 여러종류의 task를 相對 로 한 time sharing model에서는 各種類의 完結에 必要한 process time의 길이에 의해 各種類의 順位(priority)가 一方的으로 決定된 것이 通例이었다. 本 硏究에서 는 各 種類의 順位를 결정하는데 있어서, 좀더 現實的인 諸條件을 반영키 위해, 各種類의 完決에 要하는 process time의 길이 뿐만 아니라, 그들의 重要度 그리고 또 緊急度까지도 고려한 새로운 Schedulign rule을 개발하였다. 또한 이 새로운 Scheduling rule에 의해 順位를 決定하는 Algorithm도 수록하였다.

• 한국경영과학회지
• /
• 제36권3호
• /
• pp.61-74
• /
• 2011

The objective of this study is to evaluate the effects of sharing uncertain yield information with a downstream supply chain player. We are interested in understanding how the amount of yield uncertainty affects the supply-side benefits and/or costs, which has not been considered in the literature, in addition to the customer-side benefits. With that purpose, this work evaluates a supplier who provides yield information in comparison with another supplier who shares no information. We simulate an order-up-to type heuristic policy that is adapted from the literature and reasonably modified to represent yield information sharing with error. From the simulation study, we argue that the customer would experience cost reduction, but the cost for supplier's inventory is increasing when sharing yield information. Furthermore, the amount of benefits and costs are situational and affected by level of yield uncertainty and demand variance. Based on the simulation study, we finally make several recommendations for the supply-side approaches to yield information sharing.

• Journal of Communications and Networks
• /
• 제16권2호
• /
• pp.140-145
• /
• 2014

In this paper, we propose an anti-interference cooperative spectrum sharing strategy for cognitive system, in which a secondary system can operate on the same spectrum of a primary system. Specifically, the primary system leases a fraction of its transmission time to the secondary system in exchange for cooperation to achieve the target rate. To gain access to the spectrum of the primary system, the secondary system needs to allocate a fraction of bandwidth to help forward the primary signal. As a reward, the secondary system can use the remaining bandwidth to transmit its own signal. The secondary system uses different bandwidth to transmit the primary and its own signal. Thus, there will be no interference felt at primary and secondary systems. We study the joint optimization of time and bandwidth allocation such that the transmission rate of the secondary system is maximized, while guaranteeing the primary system, as a higher priority, to achieve its target transmission rate. Numerical results show that the secondary system can gain significant improvement with the proposed strategy.

• 한국경영과학회지
• /
• 제28권4호
• /
• pp.115-129
• /
• 2003

This paper suggests that the profit sharing contract can be Pareto optimal for both supplier and the purchaser. It is shown that Pareto optimal risk sharing contract can be obtained even though the decisions are made in a decentralized manner. The effect of risk attitude of the members of the supply chain is discussed. We examined various aspects of the risk sharing contract such as risk altitude, bargaining power, and cost of information system. The different risk attitude changes the optimal parameters and decision variables. Especially, we proved that, when both the supplier and the purchaser are risk averse, the purchaser orders less quantity than when the one is risk neutral and the other is risk averse. If the fixed cost for the information system is big enough to satisfy a certain condition, it is Pareto optimal not to share the profit and the purchaser takes all the risk even though he is risk averse.

• 한국BIM학회 논문집
• /
• 제6권1호
• /
• pp.25-32
• /
• 2016

In BIM environments for infrastructures, civil structures such as road, bridge and tunnel etc., created into 3D objects, integrated with their properties, securing BIM design productivity is very critical during 3D modeling. To solve this issue, configuring BIM libraries so that the users can utilize prefabricating in advance 3D objects that have been applying repeatedly during BIM design is essential so much. Current BIM libraries have made focused on Ready-Made for architectural facilities. However, establishing environment for delivering BIM library for civil facilities is very sparse. Accordingly, this study developed a web-based sharing system for delivering BIM library contents based on standardized drawing for civil area. To do this, we have analyzed core features and operation system of BIM library sharing system in domestic and overseas. Besides, functional requirements that are necessary for developing BIM library sharing system was derived, and through operation scenario configuration, the web-based system was developed according to the detailed mechanism. It is expected that this system can enhance BIM design productivity during library based modeling, and can be utilized as construction supporting tools that can help construction managers to make a design change.