• 한국통신학회논문지
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• 제41권12호
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• pp.1707-1714
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• 2016

이 논문은 OFDM (Orthogonal Frequency Division Multiplexing)기반의 이종 네트워크에서 주파수 공존 방식에 따른 시스템 전체의 전송률을 분석한다. 특히, 시간 축 또는 주파수 축 기준으로 직교한 형태의 공존 방식과 비직교 방식의 공존 방식 간의 성능을 비교하였으며, 비직교 공존 방식에서 이종 네트워크의 주파수 공유 또는 겹침(overlapping)이 전체 전송률에 미치는 영향을 분석하였다. 또한 실제 구현 환경을 고려하기 위해 송신단에 HPA(High Power Amplifier)의 nonlinear effect를 추가하여 이 HPA 파라미터에 따른 성능 분석을 하였으며 이에 따른 최적화된 이종 네트워크의 주파수 공존 전략을 제시하였다.

• 인터넷정보학회논문지
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• 제9권1호
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• pp.91-101
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• 2008

최근 IT, BT, NT 등의 융합과 각 분야에서 혁신적인 기술 발전은 건강하고 윤택한 삶에 대한 욕구와 부합하면서 의료 서비스 분야에서도 의료 장비 및 의료정보 시스템, 의료 비즈니스 애플리케이션 등 관련 기술이 더욱 다양화되고 고도화 되는 양상을 띠게 되었다. 그러나 대부분의 의료 기술은 서로 다른 의료 기관이나 관련 업체 간 상호작용 없이 독립적으로 개발되어 통합 및 호환에 큰 어려움을 겪고 있다. 본 논문에서는 기존의 헬스케어 정보 공유 시스템이 가지고 있는 기능 인터페이스들 간의 직접적인 헬스케어 정보공유 시 발생할 수 있는 문제점을 해결한다. 본 논문은 인터페이스들 사이에 각 기관들의 모든 헬스케어 정보를 저장할 수 있는 저장소를 개발하여 한번 작성된 문서를 여러 형태의 문서로 변환하여 배포한다. 즉, 최근 헬스케어 정보를 공유하기 위한 프로토콜인 HL7을 이용하여 XML로 저장하고, 저장된 문서를 관리 배포하기 위한 저장소(H-DISS: Healthcare-Document Integrated Shoring System)를 개발한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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• pp.105-108
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• 2002

In the recent manufacturing industry almost all sorts of activities tends to be digitized and networked to enhance the comprehensive efficiency of the enterprise. In that sense, enterprise informatization system as well as product information sharing system plays an important role, and those application systems are to be integrated in a smooth manner. In this paper, a prototype of an web-based product information sharing system is developed, which integrates information on technical documentation and parts information together. The prototype also integrates information on the implementation strategies for the enterprise informatization.

• 한국IT서비스학회지
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• 제12권3호
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• pp.253-271
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• 2013

Innovation becomes norm rather than exception in today's business, and accordingly firms are working on how to make their employees to work smarter using information systems and technologies. Smart work demands virtual collaboration and cooperation among team members in different places and different time. Sharing of knowledge among team members in these innovative activities are critical in every sense for the successful performance. This study explores the antecedents of knowledge sharing among team members in team-based innovation activities. Five factors (pleasure of knowledge sharing, self-efficacy, management support, rewards, and system usage) are identified through extant review of literature and an instrument is adopted and validated from previous studies. The instrument is adminitered against 138 individuals in and across 54 teams in a telecommunication firm. Except self efficacy, all the paths in the proposed research model is confirmed with different levels of relational coefficients towards the levels of knowledge sharing and innovation activities in teams. Surprisingly, findings indicate that intrinsic pleasure of sharing is most critical than management support, organizational rewards or system usage. This study fills the research gap in team management. Findings provide important implications for managing teams in coming virtual and smart environment.

• Journal of Information Technology Applications and Management
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• 제22권2호
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• pp.43-70
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• 2015

Concerns have been growing about whether domestic internet protocol television (IPTV) can establish a solid foothold in the pay TV market, largely because of the lack of IPTV-only content and service differentiation. It has been difficult for IPTV providers to attract valuable PPs (program providers) to strengthen their positions, and IPTV providers have invested much money into procuring content. To survive this difficult situation, IPTV providers need to reappraise their profit sharing methods and content distribution structure to facilitate the expansion of their subscriber base. This can be done by attracting valuable PPs to IPTV providers and securing extra revenue by distributing more content for their PP partners. The IPTV industry has a different structure and value chain from the digital cable industry. Moreover, profit sharing schemes among participants in the IPTV industry are complicated. Thus it is essential to analyze the criteria for profit sharing, the selection of attributes in profit sharing, and their cause-effect relationship in developing fair pricing for broadcast content in the IPTV industry. This study introduces the attributes that need to be considered for the pricing of content and profit sharing among IPTV providers and PPs. In addition, this study uses system dynamics to analyze the relationship among those attributes along with additional associated factors for the pricing of content.

• 정보보호학회논문지
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• 제15권4호
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• pp.61-70
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• 2005

We propose and implement a flexible secure peer-to-peer(P2P) file sharing scheme which can be used for data sharing among closed user group (CUG) members. When a member wants to share data, notification messages are sent to the members with whom the member wants to share data. Each notification message includes one-time password encrypted with the receiver's public key. A member who received the notification message can download the data by using the one-time password. The proposed scheme provides selective sharing, download confirmation and efficient storage management. In terms of security, the proposed scheme supports authentication, entity privacy, replay attack protection and disguise prevention. We also implement the proposed system and find that the system is very useful among P2P service of closed user groups.

• 대한간호학회지
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• 제44권1호
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• pp.64-74
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• 2014

Purpose: This study was done to develop and implement the Nursing KMS (knowledge management system) in order to improve knowledge sharing and creation among clinical nurses in outpatient departments. Methods: This study was a methodological research using the 'System Development Life Cycle': consisting of planning, analyzing, design, implementation, and evaluation. Quality Function Deployment (QFD) was applied to establish nurse requirements and to identify important design requirements. Participants were 32 nurses and for evaluation data were collected pre and post intervention at K Hospital in Seoul, a tertiary hospital with over 1,000 beds. Results: The Nursing KMS was built using a Linux-based operating system, Oracle DBMS, and Java 1.6 web programming tools. The system was implemented as a sub-system of the hospital information system. There was statistically significant differences in the sharing of knowledge but creating of knowledge was no statistically meaningful difference observed. In terms of satisfaction with the system, system efficiency ranked first followed by system convenience, information suitability and information usefulness. Conclusion: The results indicate that the use of Nursing KMS increases nurses' knowledge sharing and can contribute to increased quality of nursing knowledge and provide more opportunities for nurses to gain expertise from knowledge shared among nurses.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권1호
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• pp.34-49
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• 2015

Market means of spectrum trading have been utilized as a vital method of spectrum sharing and access in future cognitive radio system. In this paper, we consider the spectrum trading with multiple primary carrier providers (PCP) leasing the spectrum to multiple secondary carrier providers (SCP) for a short period of time. Several factors including the price of the resource, duration of leasing, and the spectrum quality guides the proposed model. We formulate three trading policies based on the game theory for dynamic spectrum access in a LTE based cognitive radio system (CRS). In the first, we consider utility function based resource sharing (UFRS) without any knowledge of past transaction. In the second policy, each SCP deals with PCP using a non-cooperative resource sharing (NCRS) method which employs optimal strategy based on reinforcement learning. In variation of second policy, third policy adopts a Nash bargaining while incorporating a recommendation entity in resource sharing (RERS). The simulation results suggest overall increase in throughput while maintaining higher spectrum efficiency and fairness.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2018년도 추계학술대회
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• pp.647-650
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• 2018

첨단기술들이 실생활에 접목되면서 사이버 영역은 더욱 넓어지고 이를 대상으로 하는 사이버 위협은 크게 늘고 있다. 이러한 사이버 위협을 보다 효과적으로 방어하고 대응하기 위하여 사이버 위협 인텔리전스 공유체계가 필요하다. 사이버 위협정보 표현규격의 정의를 통하여 개별 보안관제 업체 또는 기관 등이 보유하고 있는 사이버 위협 정보의 신속한 공유와 일관된 분석, 그리고 자동화된 해석을 가능하도록 한다.

• 산업경영시스템학회지
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• 제29권3호
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• pp.79-86
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• 2006

Especially, MTO(Make-To-Order) companies take collaborative approaches with their partner companies to make low-price products and/or technologically low intensive products. The collaborative approach to manufacturing requires collaboration with partner companies for inventory review, production plan, and manufacturing to fulfill customer's orders. However, frequent changes of partnerships binder partner companies from sharing production information in effective ways since their information systems have different data architectures and platforms. Therefore, it is required flexible and standardized system integration approach fir effective information sharing. This research studies current status and problems of collaborative production system, proposes an architecture for collaborative production systems based on Web Services which is a standard information technology, and discusses expected effects and the vision of Web Services.