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Internet Interprocess Communication(IIPC) Server for Hierarchical Local Area Networks
이동만(Dongman Lee),전길남(Kilnam Chon) 한국정보과학회 1984 한국정보과학회 학술발표논문집 Vol.11 No.1
The trend of LAN is forward to the interconnection and the distributed system is generally based on networks. On this idea, we propose the distributed system for the network of multiple local area networks - Hierarchical Local Area Network. And we propose the internet interprocess communication model for hierarchical local area network to necessiate the major goal of the distributed system, the referential transparency of resource to users without respect to its location.
박동선(Dongseon Park),윤원용(Wonyong Yoon),이동만(Dongman Lee) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅲ
이동성은 네트웍계층에서 뿐만 아니라, 응용계층에서도 매우 중요하다. 핸드오프는 이동성의 중요한 이슈중의 하나이다. H.323에서의 핸드오프를 위해서, 현재까지의 방법은 새로운 H.323호를 설정하는 것이다. 그러나, 이러한 방법에서는 중첩된 구간에서 새로운 호가 설정되지 않을 경우에 호가 부분적으로 끊길 수 있게 된다. 본 논문에서는 핸드오프를 위해 새로운 호를 만들지 않고, 이동터미널이 간단하게 기존의 논리채널을 닫고 새로운 논리채널을 여는 방법을 제안한다. 제안된 방법은 기존의 H.323 메시지를 변화시킬 필요가 없다. 이러한 방법으로, 지연이 줄어들며, 이동터미널은 MC 기능이 없이도 핸드오프를 수행할 수 있게 된다.
이동 애드혹 환경에서 빠른 복구를 지원하는 발행/구독 기법
문상철(Sangchul Moon),고양우(Yangwoo Ko),이동만(Dongman Lee) 한국정보과학회 2008 정보과학회 컴퓨팅의 실제 논문지 Vol.14 No.2
이 논문은 이동 애드혹 네트워크에서 발행/구독기법에 대한 기존 연구를 이벤트 브로커간의 협동 방식에 따라 분석하고 그 결과로서 공공 장소에서 사람들이 다양한 개인화 서비스를 제공받는 시나리오에서는 이벤트 전달트리 방식이 가장 유용함을 보였다. 하지만 이 방식을 이용한 기존 연구는 각 노드가 독립적으로 메시지를 교환하므로 트리를 만드는 과정에서 최신의 토폴로지를 반영할 수없다는 한계를 갖게 되며 이는 노드가 이동함에 따라 깨진 경로를 빨리 복구하지 못하게 하여 결과적으로 낮은 이벤트 수신율을 보이게 된다. 이 논문은 트리의 루트로부터 경로 정보를 전파하게 하여 이벤트 전송 경로를 생성, 유지하게 하는 방식을 제안하며 이를 통하여 한 번의 주기 이내에 이벤트 전송 경로를 복구하게 한다. 실험을 통하여 제안된 방식이 더 낮은 부담으로 더 높은 이벤트 수신율을 달성할 수 있음을 보였다. This paper analyzes previous work on publish/subscribe in mobile ad-hoc networks with respect to collaboration methods among distributed event brokers. Our experiments suggest that approaches building event delivery structures are suitable for a scenario where there are events of various types each of which is consumed by a few subscribers. However, these approaches based on independent periodic exchange of network topology information may fail to reflect the up-to-date information when building event delivery paths. For this reason they do not correctly recover a broken path caused by node mobility, which results in lower event delivery rates. This paper proposes a scheme for building and maintaining event delivery paths based on advertisements initiated by and hence propagated from the root node. This guarantees correct recovery of event delivery paths within each period. Our experiments show that, our proposed scheme gives a better event delivery ratio with lower overhead.
A Hierarchically Distributed System : Pagoda
이동만(Dongman Lee),오득환(Duckhwan Oh),허진호(Chul Chung),박현제(Jinho Hur),정철(Hyunje Park),전길남(Kilnam Chon) 한국정보과학회 1984 한국정보과학회 학술발표논문집 Vol.11 No.2
"Pagoda" is the distributed system which are being developed at KAIST. Pagoda is following the trend connecting several local area network together to make a local area internetworking environment. We proposed the internet interprocess communication server to connect the resources available to users in the internetwork environment. The goal of Pagoda is to provide distributed processing capability on the internet environment.
소셜 미디어에서 개인의 심리 및 사회적 동기요인이 정보공유의도에 미치는 영향
이동만(Dongman Lee),박현선(Hyunsun Park) 한국인터넷전자상거래학회 2011 인터넷전자상거래연구 Vol.11 No.2
This study puts its focus on what impact office workers’ motivation has on their attitude and intention of the sharing information through social media. This paper is to predict information sharing based on the theory of reasoned action(TRA). A total of 266 responses were used for analysis and the results of the study are as follows. Firstly, Enjoyment in helping and image which are psychological factors have significant influence on attitude toward information sharing. Secondly, social factors such as social network, social trust and reciprocal benefit have significant influence attitude toward information sharing. Thirdly, social norm and attitude toward information sharing has a positively influenced intention of information sharing. Information self-efficacy, however, does not have any significant influence on attitude toward information sharing. The result of this study may provide individuals and corporations with utilization of and operating strategy through social media.
e-비즈니스 기업의 혁신특성, 조직특성이 기업성과에 미치는 영향력 분석
이동만(Dongman Lee),안현숙(Hyunsook Ahn),장성희(Sunghee Jang) 한국인터넷전자상거래학회 2010 인터넷전자상거래연구 Vol.10 No.3
E-business one of information technology innovation is that have to enable firms to meet the challenges of an uncertain environment more effectively. Environmental uncertainty has two different dimensions: Market uncertainty and technology uncertainty. The purpose of this study is to investigate causal relationships between e-business adoption factors and firm performance and moderating effects of environment uncertainty on such relationships. In order to test the proposed model, a total of 109 completed the questionnaire, and we carried out data analysis using SPSS 14.0. The results of hypothesis testing show that perceived e-business advantage, financial slack and organizational learning ability have a positive impact on firm performance. Also, the results of hypothesis testing show that environmental uncertainty doesn't have moderation effects on e-business adoption factors and firm performance statistically.
대구ㆍ경북지역의 CEO 특성이 소프트웨어 기술전략과 소프트웨어 개발 기업의 성과에 미치는 영향
이동만(Dongman Lee),장성희(Sunghee Jang) 한국인터넷전자상거래학회 2012 인터넷전자상거래연구 Vol.12 No.1
The purpose of this study is to examine the factors influencing performance of CEO characteristics and software technology strategy in the software company. This model tests various theoretical research hypotheses relating to performance of software company, CEO characteristics and software technology strategy. Valid 72 questionnaires have been collected within three months of 2011. EXCEL, Smart PLS(Partial Least Square) 2.0 and SPSS 15.0 have been utilized for deriving the study results. The results of hypothesis testing are as follows. First, innovativeness positively influences innovation strategy of software product. But innovativeness does not influence marketing differentiation strategy. Second, proactiveness positively influences innovation strategy of software product and marketing differentiation strategy. Third, innovation strategy of software product and marketing differentiation strategy positively influence performance of software company.
스마트폰 중독 및 테크노스트레스에 영향을 미치는 요인에 관한 연구
이동만(Dongman Lee),하준석(Junsuk Ha),김근아(Geuna Kim) 한국인터넷전자상거래학회 2014 인터넷전자상거래연구 Vol.14 No.6
A smartphone is not a high-tech communication device any longer but has now become contemporary people’s essential necessity in their daily life. Despite its apparent benefits, a smartphone is not always beneficial. Thus, this study investigates the dark side of the smartphone trend. For this purpose, the current study examines how smartphone addiction is affected by smartphone characteristics namely ubiquity and convenience; user characteristics namely materialism and loneliness; and relational characteristics namely social interaction anxiety and relationship control. It also seeks to find out what relation there is between smartphone addiction and stress. The research model was conducted through the structural equation modeling (SEM) approach, and tested using 272 questionnaires. According to the results of this study, both ubiquity and convenience, the two variables of the smartphone characteristic, had a significant effect on smartphone addiction. Of the two variables of the user characteristic, materialism had a significant effect on smartphone addiction but loneliness did not. Both social interaction anxiety and relationship control, the two variables of the relational characteristic, were in a significant relation with smartphone addiction. In addition, smartphone addiction was found to have a positive effect on technostress. The results of this study have crucial implications concerning the negative aspect of smartphone use.