• Proceedings of the KAIS Fall Conference
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• 2000.10a
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• pp.312-318
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• 2000

본 논문에서는 보다 효과적이고 편리한 서비스를 제공할 수 있는 전자 경매를 위해 휴대형 장비 접속을 지원하는 에이전트 기법을 응용한 지능형 전자상거래 시스템을 제안한다. 제안한 시스템에서는 유선 및 무선 인터넷 사용자는 통합 인터페이스를 통해 시스템에 접근하여 개인화된 에이전트를 생성하고, 이들 에이전트들간의 거래를 주선하는 경매 진행자 에이전트가 거래과정을 지능적으로 진행함으로서 사용자의 직접적 간섭(참여)없이 거래가 이루어진다.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.1489-1492
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• 2000

요즘 전자상거래의 활성화로 전 세계적으로 인터넷 쇼핑몰과 경매 사이트를 운영하는 곳이 많이 있다. 하지만 사용하던 물건을 팔고 새로운 상품을 구매하려고 한다면 일반적으로 중고 물건을 파는 사이트를 찾아서 그곳에서 물건을 팔고 다시 다른 인터넷 쇼핑몰에서 물건을 사야하는 번거러움이 있다. 그리고 쇼핑몰 사이트의 관리자 입장에서는 판매부진상품이나 이원상품 등을 관리하기 어렵다. 또 기존에 구축되어 있는 맡은 쇼핑몰과 경매사이트의 데이터베이스의 활용도를 보면 저장된 상품을 보여주고. 판매가 되면 삭제되는 역할에 국한된 경우가 많다. 본 논문에서는 전자상거래의 사용자가 인터넷을 보다 간편하게 이용하고 사용자가 등록한 중고물품, 쇼핑몰의 판매부진상품, 이월상품의 경매로 인한 구매자의 참여를 위해 쇼핑몰과 경매 사이트를 통합하여 운영하고, 지금까지의 공통적이고 일반적인 내용의 E-mail 마케팅을 데이터 베이스 통계분석에 의해 차별화 되고 집중적인 E-mail 마케팅으로 구현한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.1
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• pp.60-64
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• 2007

Recently, real time auction system is increasingly required as internet grows up. According to this social requirement change, this paper designed and implemented a real time auction system. The system registers the goods for auction which customers add to their interested list in their point of view, automatically responds their information and gives a chance to the customer to apply to auction immediately via internet, and performs registration such as customer's information, goods, interested goods, etc. And, the customers on the system can purchase their interested goods rapidly and easily by check-up service of their interested and auctioned products without regarding to place or time through a mobile terminal.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07b
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• pp.733-735
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• 2005

인터넷 경매는 객관적 정보획득이 쉽고 신분노출이 적어 크게 각광받고 있으나 불특정 다수의 참여로 이루어지기 때문에 안정성과 효율성을 전제로 해야 한다. 본 논문에서는 인터넷과 같은 불안전한 통신채널과 호스트를 신뢰할 수 없는 상황에서 확률론적 암호화 기법을 이용하여 자신들의 입찰정보는 최대한 숨기면서 효율적으로 낙찰자와 낙찰가를 계산할 수 있는 Vickrey 경매 모델을 제안한다 제안된 모델은 Auctioneer라 Auction Issuer가 담합하지 않는다는 가정하에서 그 효율성이 입증된 Naor-Pinkas-Sumner의 시스템보다 훨씬 적은 계산량을 요구한다.

• Journal of Internet Computing and Services
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• v.20 no.6
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• pp.129-135
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• 2019

Recently, studies have been conducted to improve the m-commerce process in the NFC-based mobile environment and the increase of the number of smart phones built in NFC. Since authentication is important in mobile electronic payment, FIDO(Fast IDentity Online) and 2 Factor electronic payment system are applied. In addition, block-chains using distributed raw materials have emerged as a representative technology of the fourth industry. In this study, for the mobile gallery auction of the traders using NFC embedded terminal (smartphone) in a small gallery auction in which an unspecified minority participates, password-based authentication and biometric authentication technology (fingerprint) were applied to record transaction details and ownership transfer of the auction participants in electronic payment. And, for the cost reduction and data integrity related to gallery auction, the private distributed director block chain was constructed and used. In addition, domestic and foreign cases applying block chain in the auction field were investigated and compared. In the future, the study will also study the implementation of block chain networks and smart contract and the integration of block chain and artificial intelligence to apply the proposed method.

• Proceedings of the Korea Contents Association Conference
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• 2005.11a
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• pp.228-233
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• 2005

Recently, there are requires for auction system by growing up internet. This paper says if the customers add wonted goods to wanted list, the system automatically announce information to the customer via Inter Web browsing, whenever the proper goods to register to the auction system by seller. The system provides registration customer information, registration goods, wanted goods. And the application program can be downloaded from the Web System. Especially, this paper provides us very convenience check up service using the mobile phone, we can check our wanted goods or auction lists without regarding to place or time, we can alse purchase the goods more rapidly and easily.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.29 no.1
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• pp.76-86
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• 2006

다양한 데이터 마이닝 기법들의 발전과 더불어, 속성(Feature 또는 Attribute)의 범위(Dimension)를 줄이기 위해 많은 요소 선택 방법이 개발되었다. 이는 확장성(Scalability)을 향상시킬 수 있고 학습 모델(Learning Model)을 더욱 쉽게 해석할 수 있도록 한다. 이 논문에서는 네스티드 분할(Nested Partition, 이하 NP)을 이용한 새로운 최적화 기반 속성 선택 방법을 NP 기본 구조와 다양한 실험 문제의 수치적 결과들과 함께 제시하여 어떻게 NP의 최적화 구조가 속성 선택 과정에 기여를 하고 있는지 보여준다. 그리고 이 새로운 지능적인 분할 방법이 어떻게 매우 효율적인 분할을 수행하는지를 제시한다. 이 새로운 속성 선택 방법은 필터(Filter)방법과 래퍼(Wrapper)방법 두 가지로 구현될 수 있다. 사례 연구로서, B2B e-비즈니스 시스템에서 효과적으로 사용될 수 있는 추천 시스템(Recommender System)을 제안하였다. 이 추천 시스템은 분류 기법(Classification Rule)과 제시된 NP 기반 요소 선택 방법을 사용하고 있다. 이 추천 시스템은 사용자의 인터넷 경매 참여를 추천하는데 사용되며, 이 때 제안된 요소 선택 앨고리듬은 추천 규칙들이 쉽게 이해될 수 있도록 모델을 간략화 하는데 사용된다.

• Journal of the Korean Operations Research and Management Science Society
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• v.30 no.3
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• pp.95-117
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• 2005

This research Investigates the determinants of customer Intention to participate In Internet auction. Based on technology acceptance and trust related studies, our research proposes a theoretical model consisting of factors such as perceived usefulness, perceived ease of use, institution based trust, beliefs on sellers, trusting beliefs, and participation Intention. For examining the relationships implied by the research model, a field study using a survey methodology for data collection was conducted. The data were analyzed using AMOS based on the structural equation modeling, a second-generation multivariate technique, which has gained distinct advantages over other technique. After some model modification according to model generating strategy approach, this study shows that trusting beliefs have significant effects on the participating intention in Internet auction site. In conclusion, Implications are discussed along with limitations and further research direction.

• Journal of Intelligence and Information Systems
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• v.10 no.2
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• pp.147-163
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• 2004

For the purchase of a cheaper product on the Internet, many customers have been trying to search online shopping mall sites and visit comparison-pricing shops that compare prices and other criteria of the product. Others have been participating into online auction markets or group-buying markets. However, a lot of online shopping malls, auction markets, and group-buying markets provide the same product with different prices. Since these marketplaces have different price settlement mechanism, it is very difficult for the customers to determine marketplace to purchase, considering different kinds of marketplaces at the same time. To overcome such limitations, decision rules and solution procedures for purchase decision making are necessary, which can cover multiple marketplaces simultaneously. For this purpose, purchase decision making in each market must be conducted to maximize customer's utility, and conflicts with other marketplaces must be resolved. Therefore, we have developed the rules and methods that can negotiate cooperatively the purchase decision making in several marketplaces, and designed an architecture of Intelligent Buyer Agent and a message structure to support the idea.

• Journal of Internet Computing and Services
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• v.11 no.5
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• pp.105-117
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• 2010

In recent years, dynamic collaboration (DC) among cloud providers (CPs) is becoming an inevitable approach for the widely use of cloud computing and to realize the greatest value of it. In our previous paper, we proposed a combinatorial auction (CA) based cloud market model called CACM that enables a DC platform among different CPs. The CACM model allows any CP to dynamically collaborate with suitable partner CPs to form a group before joining an auction and thus addresses the issue of conflicts minimization that may occur when negotiating among providers. But how to determine optimal group bidding prices, how to obtain the stability condition of the group and how to distribute the winning prices/profits among the group members in the CACM model have not been studied thoroughly. In this paper, we propose to formulate the above problems of cooperative negotiation in the CACM model as a bankruptcy game which is a special type of N-person cooperative game. The stability of the group is analyzed by using the concept of the core and the amount of allocationsto each member of the group is obtained by using Shapley value. Numerical results are presented to demonstrate the behaviors of the proposed approaches.