• 산업경영시스템학회지
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• 제29권1호
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• pp.101-108
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• 2006

The issue of using information system to ensure competitive power in the market is rising. The outsourcing methods that entrust activities of information system of companies to other expert agencies are increasing as the enterprises make a lot of efforts to put their resources to their heart of business in the process of adopting information system. Recently, ASP(Application Service Provider) as a new information technology outsourcing method appears due to the development of network technology and spreading of peculating software. ASP defines as a software leasing service which is supplied through networks instead of purchasing application software with high price. For successful implementation of ASP, it is necessary to develop a certification program to ensure safety and reliability of ASP. This paper provides the safe and reliable certification program for ASP. In order to develop it, the critical issues related to service quality and certification of ASP are identified and then evaluation methodology for the ASP certification program is proposed. This paper presents service provider(service environment) certification as the part of the ASP certification program.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 춘계학술발표대회
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• pp.967-970
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• 2005

본 논문은 계산 및 데이터 그리드 환경에서 필요한 Information Provider 들의 제공 방법에 관한 것이다. 그리드 정보 서비스의 한 요소로 필요한 Information Provider 를 구현하기 위해서는 일반적으로 요구 사항을 분석한 후, 스키마를 정의하고 그것에 기반하여 Information Provider 를 구현하는 과정을 거친다. 본 논문에서는 Globus Toolkit 과 SRB 를 기반으로 구축된 계산 및 데이터 그리드 환경에서 MCE 스키마와 MSE 스키마를 정의하고, 그에 따른 각각의 Information Provider 들을 구현한다. 각각의 Information Provider 는 계산 자원에 관한 정보 및 MCAT 기반의 SRB 서버에서 유지되는 리플리카에 대한 정보를 제공한다. 이러한 Information Provider 들은 유사하게 구축된 그리드 환경에서 그리드 정보 서비스의 한 요소로 사용될 수 있을 것이다.

• 한국콘텐츠학회논문지
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• 제9권8호
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• pp.99-112
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• 2009

본 연구는 기술 거래 및 기술이전 활성화를 위해 기술 개발을 원하는 기술수요자가 기술을 개발해줄 수 있는 기술공급자를 역경매 형태로 선택하는 방안을 모색하고자 하였다. 기술수요자가 기술공급자를 직접 선택하는 역경매 방식의 기술이전으로, 개발 이전에 개발자를 선정하고 동시에 개발된 기술을 기술 이전하여 기술이 사장되는 것을 방지하고 기술이전을 활성화하는 U-IT Technology Transfer Re-auction System Model 설계를 목적으로 한다. 1단계로 기술수요자가 기술 개발을 원하는 기술과 이에 대한 조건을 입력 전송한다. 2단계로 기술을 제공할 수 있는 기술공급자 DB에 1단계 데이터가 전송된다. 3단계로 입찰에 참여를 원하는 기술공급자는 각자의 조건을 입력 후 시스템에 전송하여 입찰에 참여한다. 4단계로 조건 최적화 경매 방식으로 기술수요자가 낙찰 순위를 결정한다. 5단계로 기술수요자가 기술공급자에게 낙찰에 응하도록 한다. 6단계로 기간내에 낙찰을 하지 않을 시 유찰되는 것으로 한다. 2회 이상 유찰시 자동으로 거래가 소멸되는 것으로 하는 기술수요자 중심의 역경매 방식이다.

• Journal of Information Technology Applications and Management
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• 제20권3_spc호
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• pp.201-217
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• 2013

This paper analyzes the effect of network neutrality regulation on social welfare using the two-sided market under the network congestion. This paper deals with zero price rule regulation which means the price regulation on the side of content. The results are as follows : First, under the monopoly platform, internet use price, contents price, and the number of internet user and content provider are all decreasing as the network congestion increases. Second, under the monopoly platform internet use price, contents price, and the number of internet user and content provider are all increasing as the network capacity increases. Third, the price of internet use and contents internet use which maximize social welfare are increasing and the number of internet user and content provider are decreasing as the network congestion increases. Fourth, optimal network capacity for monopoly platform provider is less than socially optimal network capacity. Fifth, if network neutrality regulation is enforced, the price of internet use is higher than monopoly platform provider and the price of contents is lower than monopoly platform provider. Also, the number of internet user is less than monopoly platform provider and the number of content provider is more than that. By the way, when network congestion increases, internet use price, the number of internet user, and the number of content provider are decreasing. Sixth, network neutrality regulation is more effective for internet user side than contents provider when network congestion is considered. This means that network neutrality regulation is not effective for contents market side when network congestion is seriously large.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권12호
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• pp.3135-3148
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• 2013

The popularization of streaming networks and mobile devices brings a new kind of network called mobile peer-assisted streaming network. In this network, service provider not only offers downloading services, but also pre-pushes resources to users for caching. Users can download their demanded resources while working as servers for uploading the cached data. Also the mobile characteristic makes high package losing probability in this network. So we study how the service provider pre-pushes or the user downloads resources efficiently and effectively while considering the package losing in this paper. We build utility models for service provider and user, and solve the models using Bellman's theory to achieve Nash Equilibrium which shows the service provider's optimal pre-pushing speed and user's optimal downloading speed. The numerical simulation demonstrates the efficiency and effectiveness of our proposed pre-pushing and downloading scheme by comparing to the traditional scheme.

• 산업공학
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• 제19권1호
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• pp.62-69
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• 2006

In these days companies are rapidly implementing the extended enterprise collaboration to provide enhanced management services and products based on the enterprise integration that human resources, technologies and the management process. In this corporate environment, ASP (Application Service Provider) which is the developed type of outsourcing in the area of information technology, is a good alternative for corporate information system management. ASP defines as a software leasing service which is supplied through networks instead of purchasing application software with high price. For successful implementation of ASP, it is necessary to develop the certification methodology to ensure safety and reliability of ASP. The paper provides the safe and reliable certification methodology for ASP. In order to develop it, the critical issues related to service quality and certification of ASP are identified and the systematic certification methodology of application and service provider(service environment) domains of ASP are provided. A evaluation method for the developed certification methodology is also proposed.

• Spatial Information Research
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• 제7권2호
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• pp.175-190
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• 1999

최근 GIS 관련 기술이 급속도로 발전되고 안정화됨에 따라 기 구축된 우수한 GIS 기술들의 재사용 문제가 제기되고 있다. 현재 이러한 재사용 문제들은 GIS 모듈의 컴포넌트화와 표준 인터페이스 제정을 기본 방향으로 하는 GIS의 표준화 연구 방향으로 해결책을 모색하고 있다. [1] 현재 GIS 표준화 연구는 초기 단계로서 GIS 하부구조의 표준화, 다시 말하면 범세계적으로 통용될 수 있는 GIS 정보의 표준 하부구조의 구축에 역점을 두고 있다. 이러한 표준화 작업은 국제적인 GIS 선도 업체 위주로 구성된 개방형 GIS 정보의 표준 하부구조의 구축에 역점을 두고 있다. 이러한 표준화작업은 국제적인 GIS 선도 업체 위주로 구성된 개방향 GIS 컨소시엄(OGC : Open GIS Consortium)을 주축으로 하여 국제적인 GIS의 표준모델을 제시하고 있다. 특히 본 연구에서는 개방형 GIs 컨소시엄(OGC ; OpenGIS Consortium)에서 제안한 OLE/COM Simple Feature 구현 사양 1.1을 주축으로 하여 응용 시스템에 표준화된 방식으로 GIS 데이터를 서비스할 수 있는 데이터 제공자(Data Provider) 컴포넌트의 구축에 관한 사항을 종합적으로 살펴보고자 한다. 다양한 데이터베이스 시스템 또는 파일 시스템을 GIS 데이터의 기반으로 하여 표준화된 인터페이스를 제공할 수 있는 데이터 제공자 컴포넌트의 구축 방법, 데이터 제공자 컴포넌트들간의 GIS 데이터의 공유 방법 그리고 응용시스템에서의 데이터 제공자 컴포넌트 이용 방법에 관하여 중점적으로 살펴볼 것이다. 특히 이러한 OGC 사양의 데이터 제공자 컴포넌트를 구현하는 과정에서 야기되는 문제점들을 리스트하고 이의 해결방안에 대하여서도 논의할 것이다. 그리고 본 연구에서는 데이터 제공자 컴포넌트의 설계 및 분석과정을 수행함에 있어서 UML(Univied Modeling Language)을 이용함으로서 향후 타데이터 제공자 컴포넌트 개발을 위한 모델을 제시하고 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권2호
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• pp.565-586
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• 2022

Cloud storage's elastic expansibility not only provides flexible services for data owners to store their data remotely, but also reduces storage operation and management costs of their data sharing. The data outsourced remotely in the storage space of cloud service provider also brings data security concerns about data integrity. Data integrity verification has become an important technology for detecting the integrity of remote shared data. However, users without data access rights to verify the data integrity will cause unnecessary overhead to data owner and cloud service provider. Especially malicious users who constantly launch data integrity verification will greatly waste service resources. Since data owner is a consumer purchasing cloud services, he needs to bear both the cost of data storage and that of data verification. This paper proposes a verification control algorithm in data integrity verification for remotely outsourced data. It designs an attribute-based encryption verification control algorithm for multiple verifiers. Moreover, data owner and cloud service provider construct a common access structure together and generate a verification sentinel to verify the authority of verifiers according to the access structure. Finally, since cloud service provider cannot know the access structure and the sentry generation operation, it can only authenticate verifiers with satisfying access policy to verify the data integrity for the corresponding outsourced data. Theoretical analysis and experimental results show that the proposed algorithm achieves fine-grained access control to multiple verifiers for the data integrity verification.

• Journal of Information Technology Applications and Management
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• 제21권3호
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• pp.35-52
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• 2014

This study aims to examine how the relationship with an information source affects people to perceive credibility of online information. We developed a conceptual framework that explained how people perceived information credibility when they were familiar with the information source and/or when the information source seemed credible. We then compared the models in two different contexts, namely, online review and social media sites, to examine differences. We surveyed 136 online social media users with their online shopping experiences. Among our eight hypotheses, three (H6: the personality similarity between an information provider and an information seeker enhances the perceived credibility of the former; H7: the credibility of an information provider produces a much stronger mediating effect in review sites than in social media sites; H8: the familiarity of an information seeker with an information provider produces a stronger mediating effect in social media sites than in review sites) are fully supported and four (H1: the credibility of an information provider has a positive influence on the perceived credibility of the online information; H2: the familiarity of an information seeker with an information provider has a positive influence on the perceived credibility of the online information; H3: the goal similarity between an information provider and an information seeker enhances the perceived familiarity of the latter with the former; H5: the personality similarity between an information provider and an information seeker enhances the perceived familiarity of the latter with the former) are partially supported. The hypothesis of H4: the goal similarity between an information provider and an information seeker enhances the perceived credibility of the former is rejected. The result confirms that credibility of information is strongly mediated by credibility of information source than familiarity with information source in online review sites and vice versa in social media sites.

• 무역상무연구
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• 제34권
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• pp.157-185
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• 2007

The purpose of this thesis is to contribute to the activation of e-contract service for one stop e-trade by analyzing the problems and its solutions in e-contract service at home and abroad. In order to achieve the purpose of this thesis, case studies are done on e-contract service providers such as CECTRUST service of NTT DATA in Japan and HanCM.com of Haansoft in Korea and user companies such as Taisei Corporation using CECTRUST service and Hyundai Card using HanCM.com. The problems in the e-contract service are the lack of e-contract service providers, rare publicity of e-contract service, limited use of e-contract service at only home, higher pricing for e-contract service, short time management of e-contract documents by service providers, no application of newly developed security technology to e-contract service, unsatisfaction of requirements of e-contract service provider as trusted third party, absence of lower pricing e-contract service by service provider, authorizing key error in electronic signature under recognized authentication system in case of fail in renewal of digital certificate and reproduction of digital certificate. The solutions of these problems are the upbringing of e-contract service providers, broad publicity of e-contract service, development of e-contract service on a global basis, establishment of lower pricing for e-contract service, long time management of e-contract documents by service providers, application of newly developed security technology such as bio technology to e-contract service, satisfaction of requirements of e-contract service provider as trusted third party by designation of recognized e-document repository, development of lower e-contract service by way of application service provider(ASP), introduction of time stamping of e-contract document and signature key value. The limitation of this thesis is that the problems and its solutions could not meet with the broad recognition as they are conferred by intuition because of few e-contract service provider.