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- 저자 : 김영천 ( Young-chon Kim ) (검색결과 122 건)
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전자상거래 시스템에서 퍼지논리를 이용한 사용자 선호도에 관한 연구
김영천(Young-chon Kim),이성주(Sung-Joo Lee) 한국지능시스템학회 2001 한국지능시스템학회논문지 Vol.11 No.1
인터넷의 대중화와 더불어 전자상거래에 대한 관심과 중요성이 더욱 증대되고 있다. 전자상거래에서 보다 많은 고객들을 유치하기 위해서는 거래의 안정성 보장, 시스템의 사용 편의성, 다양한 물품의 제공, 저렴한 가격 등과 함께 차별화된 고객 서비스 전략이 필요하다. 고객의 취향에 적합한 상품 정보를 제공함으로써 고객의 만족도를 증진시키고 나아가 지속적인 방문을 유도하고자 한다. 본 논문에서는 고객이 전자상거래 쇼핑몰을 방문시 고객별로 관리되는 선호도를 활용하여 고객의 취향에 적합한 상품 정보를 제공한다. 퍼지논리를 이용하여 제품군간에 근접도를 반영함으로서 사용자에게 보다 좋은 상품 정보를 제공하는 기법을 제안한다. Not only the guarantee of transaction stability, the convenience of using the system and an supply of all kinds of goods but also the differentiated service strategy for customers are needed in order to attract more customers in electronic stores. In this paper, we propose a differentiated service strategy for customers that can supply the better information about goods for the customers by evaluating the closeness between goods. If the customers visit the shopping mall for EC, the proposed method supplies such information about goods as consistent with the customers' favorite by employing the customers' preference that is managed separately for each customer. The proposed approach as like the above can enhance the satisfaction of customers and result in the steady visit of them.
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p-Persistent MAC Protocol for WDM Ring Networks
소원호,김영천,So, Won-Ho,Kim, Young-Chon The Korea Institute of Information and Commucation 2007 韓國通信學會論文誌 Vol.32 No.9b
In this paper, a WDM metro ring consisting of access nodes with $FT-FR^n$ (Fixed Transmitter - n Fixed Receivers) is considered. A trade-off exists between node throughput and transmission fairness because the access nodes share wavelength channels. In order to eliminate the transmission unfairness and to increase throughput, the p-persistent medium access control (MAC) protocol is proposed: each node uses an empty optical slot to transmit a packet and make it available with the extraction of a transferred packet at the source access node, called source-stripping. The local empty slot can be used to transfer a head-of-line packet in the local buffer with probability p or it is used for the next downstream nodes with 1-p. The proposed MAC protocol provides better node throughput than the non-persistent protocol and exhibits better fairness index than the 1-persistent protocol in WDM ring networks. In addition, numerical analysis shows that the proposed MAC protocol maximizes the node throughput under uniform traffic conditions. For more detailed results, we use the network simulation under Poisson and self-similar traffic. Furthermore, unpredictable traffic constructed by the combination of the former and the latter is also considered. The reasonable probability of the p-persistent protocol for a given architecture can be determined through simulation.
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위성간 링크를 가지는 다중 홉 저궤도 위성망에서 멀티 클래스 지원을 위한 경로 배정 기법
이봉주,김영천,Lee, Bong-Ju,Kim, Young-Chon 한국전기전자학회 2003 전기전자학회논문지 Vol.7 No.1
This paper proposes a routing scheme for multi-hop LEO satellite networks with inter-satellite links aiming for reducing the number of link handovers while keeping the efficient use of network resource. The proposed routing scheme controls the link handovers by taking account of the deterministic LEO satellite system dynamics, geographical location of a ground terminal and statistic information of call duration. The performance of the proposed routing scheme has been evaluated and compared with previous routing schemes in terms of average number of link handovers during a call, the call blocking and dropping probability, and the network utilization.
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