• Journal of KIISE:Computing Practices and Letters
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• v.13 no.5
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• pp.320-332
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• 2007

Recently, new interests on digital contents and UCC(User Created Content)s are growing fast through the development of internet. However, there have been many side-effects on those interests. The representative problems are perversing illegal copies and the distributions for personal valuable digital contents to unauthorized anonymous users. These decrease creation of good digital contents by interfering with the growth of information technology industry and the content provider#s creative will. To resolve these problems, in the paper, we propose a novel auction system for multimedia contents and bidding processes. The system applies the concept of used goods onto digital contents. Especially, the auction system is based on mobile environment. Finally, the performance evaluation shows that those main auction process algorithms indicate the time complexity of logarithm scale for insertions and searches. Therefore, the performance of the system is not significantly influenced by the amount of contents even though the volume of contents in the system is increasing.

• Journal of the Korea Society for Simulation
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• v.23 no.1
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• pp.1-10
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• 2014

A cloud computing is one of a parallel and distributed computing. The cloud computing provides some service for user with virtual resources. However, a user's service request does not show a time pattern. As a result, each resource also shows a different availability at the same time. This difference affects a quality of service (QoS) and a resource selection for users. Therefore, we propose the resource availability-based multi auction model for cloud service reservation and resource brokering system. The proposed system is to select the proper resource provider based on the users' request. The proposal adopts the multi phase of the auction to transact resources. The system evaluates the available factor of each resource on the auction phase, and finally reserves the service on the adaptive queue. The proposed model shows the better performance than other existing method.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.839-842
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• 2003

경매 개념을 도입한 쇼핑몰의 경우 제품 판매자가 원하는 가격을 제시하고 그 가격에 근접하는 형태로 구매자들끼리 가격 협상을 벌인다. 경매 개념이 도입된 쇼핑몰은 구매자들에게 좀 더 저렴하게 제품을 구매할 수 있도록 하는 장점을 제공하고 있다. 그러나, 대부분의 제품이 경매 종료 시점에 입찰하여 물건을 구입해야 하는 문제점을 가지고 있다. 본 논문에 구현한 OAAS 시스템은 사용자가 경매사이트를 통해 물건을 구매하는 경우 경매 종료 시점에 직접 접속하여 경매에 참여해야 하는 문제점을 제거하였으며, 사용자가 지정한 조건을 가지고 입찰에 참여하여 제품을 낙찬 반을 수 있도록 하여 사용자의 편이성을 증가시켰다.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.356-358
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• 1998

인터넷의 급속한 성장과 함께 전자상거래에 대한 연구 및 개발이 활발하게 진행되어 있다. 본 논문에서는 전자상거래의 응용분야의 하나인 전자 경매 시스템을 인터넷 환경에 가장 적합한 언어인 Java 와 Java 암호화 모튤을 이용하여 설계하였다.

• Proceedings of the Korea Association of Information Systems Conference
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• 2005.12a
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• pp.204-212
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• 2005

본 연구에서는 인터넷 경매기반 CPC 광고에서 광고비 효율을 극대화시킬 수 있는 최적 포지셔닝을 결정하는 전략을 수립하고자 특정 인터넷 쇼핑몰과 그 쇼핑몰에서 사용한 키위드를 대상으로 실험적 데이터 분석을 수행하고자 한다. 이 분석 결과를 기초로 다이나믹하게 변화하는 키위드 광고의 최적 노출 포지션을 제안하고자 한다.

• Information Systems Review
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• v.6 no.1
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• pp.155-166
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• 2004

As the necessity of such mobile wireless terminals as PDAs or Cellular phones drastically increases, the terminals play important role in various business areas. In this paper, a bidding system in mobile wireless environments is constructed. However, with many mobile wireless terminals modifying at the same time their (duplicated) bidding values for a given data item, data coherency for the data item becomes essential. Therefore, in this paper, a bidding system using SyncML data synchronization mechanism is proposed and constructed. SyncML is one of data synchronization mechanisms proposed by the SyncML Initiative, a consortium of mobile wireless mobile technology leaders for universal data synchronization. The bidding system is implemented and tested in LINUX, C++, and PocketPC 2000 emulator programming environments.

• The Journal of Society for e-Business Studies
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• v.13 no.2
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• pp.56-82
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• 2008

The topic on Flow is generating increased interests in e-commerce studies. Flow has been identified as a key component in e-commerce. Studies on Flow have so far focused on internet shopping mall, but scarcely looked at the Flow of Internet auction. The purpose of study is to find out which factors play a major role in building Flow on internet auction and how the built-up Flow affect Brand Equity. Therefore, the research model investigates what factors influence Flow. Furthermore, the research is designed to understand how the Flow influences Brand Equity. The antecedents of Flow classifies into three types such as personal (Challenge, Skill), IT characteristic, Internet Auction characteristic. The results of this empirical study shows that three characteristics significantly affected the flow：personal (Challenge), IT (information quality, system quality), and Internet Auction (interactivity). And also Flow has significant effect on the brand equity. This result indicates that customer's optimal experience is important to increase brand equity. That is, the flow is influenced by multi-dimensional factors and plays an important role in increasing brand equity. Finally, the finding of this study suggests that personal challenge, information quality, system quality, and interactivity should be enhanced preferentially.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10a
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• pp.379-381
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• 2000

인터넷의 급속한 발전으로 인터넷 경매와 같은 e-business가 활발해 지면서 사용자의 요구사항도 빠르게 변하고 있다. 급변하는 사용자들의 요구사항을 반영하고 소프트웨어의 경제성, 시장 경쟁력 확보를 위한 방법은 산업계 및 학계에서 많이 거론되고 있다. 최근 EJB(Enterprise JavaBeans) 기반의 컴포넌트 개발은 재사용성을 확보할 수 있는 가장 주목 받는 방안으로 제시되고 있다. 기존의 객체지향에 의한 소프트웨어 개발 방법은 이미 재사용성, 유지보수성, 무결정, 안정성 등의 많은 장점으로 인해 학계와 산업계에서 이미 많이 보편화 되어 있고 널리 이용되어지고 있다. 하지만, EJB에 기반하여 컴포넌트 어플리케이션을 개발하는데 있어서는 그 적용 사례가 드물고 그 활요성 또한 검증된 바가 거의 없다. 따서 본 논문에서는 인터넷 경매시스템에 EJB를 적용해 봄으로써 시스템 개발시의 그 실무적인 유용성을 검증해 본다.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.309-313
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• 2000

기업이나 일반 사용자의 인터넷 이용이 급증하면서 인터넷을 통한 전자 상거래가 증가되고 있으며, 일반적인 생활형태의 한 방법으로 정착되고 있다. 현재 인터넷을 통해 제공되고 있는 다양한 형태의 서비스 중 경매, 예약, 주식거래 시스템은 클라이언트 역할을 담당하는 Web Browser상에서의 실시간 처리 및 공유 데이터의 일관성 유지가 필수적이다. 본 논문에서는, 웹 상에서 실시간 처리를 위한 하나의 실험 모델로서 경매시스템을 제안하였고, N-tier 모델 하에 RMI 메커니즘을 채택한 객체 지향 분산 프로그래밍 환경의 일종인 HORB[1]를 적용하여 구현하였으며, 클라이언트 수에 따른 실행시간을 비교하는 실험을 통해 웹에서 적용 가능성을 확인하였다.

• Journal of Convergence for Information Technology
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• v.11 no.2
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• pp.31-40
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• 2021

Blockchain technology is also actively studied in the real estate transaction field, and real estate transactions have various ways. In this paper, we propose a model that simplifies the authentication procedure of auction systems using Ethereum's Ether to solve the problem of offline court auctions. The proposed model is written in Ethereum's Solidity language, the court registers the sale date and the sale date with the DApp browser, and the bidder accesses the address of the individual's wallet created through Metamask's private key. The bidder then selects the desired sale and enters the bid price amount to participate in the auction. The bidder's record of the highest bid price for the sale he wants is written on the Ethereum test network as a smart contract. and creates a block. Finally, smart contracts written on the network are distributed by the court auction manager to all nodes in the blockchain network, and each node in the blockchain network can be viewed and contract verified. As a result of analyzing the smart contracts of the proposed model and the performance of the system, there are fees incurred due to the creation and use of Ether on platforms using Ethereum, and participation. Ether's changes in value affect the price of the sale, resulting in inconsistent fees in smart contracts each time. However, in future work, we issue our own tokens to solve the market volatility problem and commission problem with the value change of Ether, and refine complex court auction systems.