• 한국IT서비스학회:학술대회논문집
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• 2006.05a
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• pp.282-289
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• 2006

의료기관의 정보화 수준이 높아짐에 따라 권한 없는 자의 정보 접근 및 유출, 진료정보 및 개인정보의 손실이나 파손, 환자 안전에 대한 위협 등 여러 가지 정보보호 리스크 요인이 대두되고 있다. 의료기관이 취급하고 있는 의료정보는 환자 개인을 식별할 수 있는 개인정보뿐만 아니라 개인의 사생활보호 차원에서 신중하게 취급해야 하는 매우 민감한 진료 정보를 포함하고 있으므로 정보보호의 중요성이 매우 크다고 볼 수 있다. 따라서 개인의료정보를 컴퓨터와 네트워크를 통해 처리하는 의료기관의 정보보호 수준 제고가 매우 중요하고 시급한 과제로 인식되고 있다. 본 연구에서는 의료기관 정보화의 진전과 원격의료/재택의료의 발전, 국가보건의료정보 인프라 구축, e-Health 및 유비쿼터스 건강관리 시대의 도래 등과 같은 중대한 의료정보 패러다임의 변화 속에서 정보보호의 이슈와 해결방안을 모색해 보았으며, 의료정보보호 수준제고를 위한 정책방향을 제시하였다. 개별 의료기관뿐만 아니라 국가 차원의 의료정보 인프라 구축 사업 추진 시에도 본 연구에서 제안한 의료정보 보호 수준제고 방안이 적용되어 정보화의 효율성과 정보보호가 균형을 이룰 수 있을 것으로 기대된다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10a
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• pp.459-463
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• 2006

유비쿼터스 환경은 이질적인 디바이스와 서비스로 구성되어 있으며 많은 컴포넌트들이 각기 목적을 가지고 여러 네트워크에 산재되어있다. 이러한 디바이스들을 연결하고 서비스를 효율적으로 관리하기 위해 비슷한 목적을 가지는 컴포넌트들을 하나의 그룹으로 묶을 수 있다. 이러한 그룹의 멤버들은 서비스를 제공하기 위해 같은 그룹의 멤버들과 리소스를 공유하며 때로는 그룹의 모든 멤버들이 동시에 하나의 리소스를 사용하기도 한다. 서로 다른 그룹이 이러한 리소스를 공유하기도 한다. 따라서 그룹 간에 상호 배제 알고리즘이 필요하다. 이 논문에서는 쿼럼-기반 알고리즘(Quorum-based algorithm)을 응용하여 유비쿼터스 환경에서 그룹간의 상호 배제문제를 해결하는 알고리즘을 제안하고 이에 대한 성능측정 결과를 설명한다.

• Annual Conference of KIPS
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• 2012.04a
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• pp.1088-1090
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• 2012

많은 연구기관에서 연구성과물로 연구보고서, 논문, 특허등의 산출물을 생산하고 있다. 이러한 데이터는 기관의 특성과 자체적으로 운영되고 있는 정보서비스의 성격에 따라 고유의 데이터 스키마와 형태를 가지고 있다. 또한 연구성과물(논문,연구보고서)을 체계적으로 관리하고, 데이터의 부가가치를 높이기 위해 서로의 데이터의 연계와 융합을 통해 새로운 정보서비스가 요구되고 있다. 본 논문에서는 서로 다른 네트워크간 에 있는 데이터를 연계하기 위해 데이터 상호 운용을 활용하고, 이를 위한 방안으로 MAS(Multi Agent System)기반의 연계프레임워크를 통해 연구보고서의 체계적인 수집 및 서비스를 위한 데이터의 융합을 위한 방안을 제시하고자 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.3
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• pp.537-548
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• 2000

ATM is the effective information transmission method which multiply statistical and can accept effective the traffic of the various transmission rate. However, it can happen excessive cell loss probability and cell delay when it have temporarily overload. Therefore, it is required the effective traffic control and network resource management for which guarantee QoS(Quality of Service) in terms of users and bandwidth utilization maximization in terms of networks. In this paper, we proposed POBP(PushOut BP) scheme which mixed pushout scheme with BP(Back Pressure), reactive control scheme recommended at the ATM Forum, to guarantee QoS in two stages ATM switch networks. In proposed method, we have to understand exactly using bandwidth information in real-time and become traffic shaping. Thorough these processes, we can not only use effectively unused bandwidth, but also guarantee the fair bandwidth utilization and then can improve cell-loss possibility happened by congestion states in two stage ATM networks.

• Journal of Digital Contents Society
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• v.19 no.3
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• pp.513-519
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• 2018

The objective of this study was to examine the trends on social network services. The abstracts of 308 articles were extracted from web of science database published between 1994 and 2016. Time series analysis and topic modeling of text mining were implemented. The topic modeling results showed that the research topics were mainly 20 topics: trust, support, satisfaction model, organization governance, mobile system, internet marketing, college student effect, opinion diffusion, customer, information privacy, health care, web collaboration, method, learning effectiveness, knowledge, individual theory, child support, algorithm, media participation, and context system. The time series regression results indicated that trust, support satisfaction model, and remains of the topics were hot topics. This study also provided suggestions for future research.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.48 no.6
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• pp.140-148
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• 2011

Multimedia streaming service is susceptible to loss and delay of data as it requires high bandwidth and real time processing. Therefore QoS cannot be guaranteed due to data loss caused by heavy network traffic. To deal with these problems, a study on algorithm that can provide high quality multimedia service by considering both network congestion and characteristics of multimedia data is required. In this paper, we propose APQM algorithm which probabilistically removes packet by the congestion level of the queue in wireless station. The comparison with other existing scheduling algorithms shows tht congestion in the network is reduced and multimedia service quality of the proposed algorithm is improved.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.11
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• pp.2113-2119
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• 2006

In this paper, we design the r-Sensor protocol for reliable data transmission in the Intelligent Home Service based on the wireless sensor network environment. The r-Sensor protocol improve the reliability of data transmission and node fairness using simple routing algorithm, congestion control, and loss recovery method that minimize the load of relay node. Reposed routing algorithm find out upstream and downstream nodes using the Network Management packet. Meanwhile, loss recovery algorithm uses the Aggregated-Nack. To apply supposed algorithm, the IHS-AMR(Intelligent Home Service - Automatic Meter Reader) and sensor node are designed and implemented in hardware. The IHS-AMR provides remote metering service and also offers home safety service by internetworking with sensor network, mobile phone network and internet.

• Journal of Korean Society of Archives and Records Management
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• v.18 no.4
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• pp.183-204
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• 2018

The main purpose of this study was to investigate the research topics of the Journal of Korean Society of Archives and Records Management, which is one of the main academic journals of archival research in Korea. To achieve this objective, a total of 875 author-assigned Korean keywords were collected from the 390 papers published from the first issue (i.e., 2001) to the current issue (i.e., 2017) in the target journal. The collected keywords were analyzed using NetMiner V.4 to discover their frequency, degree centrality, and betweenness centrality. Results showed that "Archival Information Services," "Electronic Records," "Historical Archives," "Archivists," and "National Archives of Korea" showed the most frequently conducted research topics; whereas "Archival Information Services," "Electronic Records," "Evaluation," "Locality Archives," and "Retrieval System" were the most influencing research topics. On the other hand, "Archival Information Services," "Archivists," "Electronic Records," "Archive," and "Metadata" showed the most widely intervening research topics in this research.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.2
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• pp.427-434
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• 2018

Video services have been widely generalized thanks to the progress in compression streaming technologies. In spite of the innate difficulties in guaranteeing quality of service(QoS) of the Internet, the quality of service that is experienced by users have been improved considerably with overall bandwidth growth over the Internet and new compression and streaming technologies. For further sophisticated management scheme from the current homogeneous one, it should consider the characteristics of video contents. This paper investigates that the Quality of Experience(: QoE) for video services can vary according to the characteristics of video contents for the same compression method and transmission environments. It is expected that this result contributes to establish a new and advanced scheme to manage QoE for video services over the Internet.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.105-108
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• 2007

In this paper, we have developed a UPnP-OSGi Bundle for digital convergence based on UPnP middleware. UPnP-OSGi bundle is demanded sustaining realtime monitering system based on UPnP middleware that is possible multimedia ability of a piece with a multiplicity of service and joint user data , service lifecycle , management division service for home network system offered convergence service. This bundle is possible a multiplicity of control and monitering service segmentation so develop a multiplicity of service is easy. and provide zero-configuration system.