• Journal of Information Technology Applications and Management
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• 제17권2호
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• pp.187-205
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• 2010

This study takes a holistic approach to understand the diffusion of IPTV services by combining the adoption-diffusion model and the use-diffusion model of innovation. IPTV service, a leading digital converged application coupling media content with telecommunications, has been recently launched commercially in Korea. We created a structural model of adoption-diffusion, using the perceived easeof-use and usefulness of TAM(Technology Acceptance Model) as mediating variables, and a structural model of use-diffusion, with the rate of use and the variety of use as mediating variables. To empirically analyze these models, non-users of IPTV were surveyed using the adoption-diffusion model to identify factors influencing their intention to subscribe to the service. Meanwhile, users of IPTV were surveyed using the use-diffusion model to determine the factors that influence their satisfaction with the service and their intention to re-use it. Under the adoption-diffusion model, we found that trialability, household innovativeness and perceived risk were the determinants of user satisfaction with IPTV, and perceived ease-of-use, the mediating factors. Under the use-diffusion model, complementarity and communication were shown to be the determinants of users' satisfaction with IPTV, and variety of use, the mediating factor. We also found that consumers' intention to re-use IPTV was strongly influenced by its relative advantage and perceived risk.

• 한국IT서비스학회지
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• 제12권2호
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• pp.243-256
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• 2013

Recently, due to the proliferation of smartphones, users of mobile multimedia services which are based on wireless internet without constraint of the time and places are significantly increased. In this study, considering the characteristics of mobile multimedia and the user behavior, we analyse the factors which have an effect on the behavioral intention to use the mobile multimedia services. For this purpose, we use the model which is based on Technology Accepted Model (TAM) and add two constructs; the perceived enjoyment and the perceived risk. A survey data for 280 students at the K cyber university is used for statistical analysis As a result, the perceived ease of use affects the perceived usefulness and the perceived enjoyment, and the perceived ease of use. And the perceived usefulness and perceived enjoyment affect continuous intention to use. On the other hand, the hypothesis which the perceived risk would affect adversely the continuous intention to use is rejected. Through this study, we expect to provide the useful implications for the mobile multimedia services and contribute to the development of strategy for them.

• 한국정보시스템학회지:정보시스템연구
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• 제21권4호
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• pp.55-79
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• 2012

LBS(Location-Based Service) is one of the smartphone application services which has been receiving great attention recently. Various applications of smartphone use LBS to provide innovative services. However, use of LBS raises privacy concerns because the location information of users is constantly exposed. Privacy calculus perspective attempts to understand the characteristics of the user's privacy. It is based on the risk-benefit analysis in the economics' perspective. That is, when the benefit expected through personal information disclosure is higher than risk, we are willing to provide personal information. This research suggested a research model based on the privacy calculus perspective to clarify the effect of information disclosure intention of smartphone LBS application users. Based on the main factors of privacy calculus, perception of privacy risk and privacy benefit, the relationship of the perceived value and the information disclosure intention was empirically analyzed by utilizing structural equation modeling(SEM) methodology. According to the results of the empirical analysis, it was found that all relations have statistically significant explanatory power except the relation between privacy concern and information disclosure intention. This study showed a strong evidence of antecedent factors based on privacy calculus of personal information disclosure in smartphone LBS applications.

• 경영정보학연구
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• 제7권1호
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• pp.173-193
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• 2005

아웃소싱의 새로운 형태로 등장한 ASP 서비스는 저렴한 비용, 낮은 위험부담 등의 장점 때문에 소기업이나 신생기업에 유용한 정보화 방안이 될 수 있다. 그러나 ASP는 그 중요성에도 불구하고 이에 대한 학문적 연구는 그렇게 많지 않은 실정이며, 지금까지 아웃소싱에 대한 연구 또한 대기업을 주 대상으로 하고 있다. 본 연구의 목적은 ASP 서비스의 주 사용자 입장에서 국내 소기업과 관련한 주요 환경변수가 ASP 서비스의 활용유형에 미치는 영향을 살펴보고 그 활용유형별로 서비스 만족도와 기업성과간의 관계를 살펴보는데 있다. 실증분석결과, 본 연구에서 주요 환경변수로 고려된 기업규모는 소기업의 정보화 필요성 인식도에 영향을 미치고 정보화 필요성 인식도는 교육시간 및 사용기간에 영향을 미치는 것으로 밝혀졌다. 또한, 기업규모, 정보화 필요성 인식도, 교육시간은 소기업의 ASP 서비스 활용유형에 영향을 미치는 반면에 사용기간은 소기업의 ASP 서비스 활용유형에 영향을 미치지 않는 것으로 밝혀졌다. 마지막으로 본 연구에서는 소기업의 ASP 서비스 활용유형은 기업성과 및 사용자 만족도에 영향을 미치고 ASP 서비스에 대한 사용자 만족도는 기업성과에 영향을 미친다는 점을 검증하였다.

• 한국도서관정보학회지
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• 제42권1호
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• pp.397-415
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• 2011

방대한 이용자 기반을 지닌 인터넷 검색 포털인 구글은 도서검색(Book Search) 서비스를 제공하고 있다. 구글은 도서검색서비스의 제공에 필요한 정보자원의 확보를 위해 출판계 및 도서관계와 협력을 추진하고 있다. 출판계와는 출판사가 저작권을 보유한 도서의 이용을 목적으로 협력하고 있으며, 도서관계와는 도서관이 소장한 장서의 디지털화 및 디지털로 변환한 자료의 활용을 위해 협력하고 있다. 구글도서검색 서비스는 방대한 이용자 규모에 기반을 두는 구글의 영향력에 따른 독점의 위험성과 독점에 따라 야기될 수 있는 잠재적인 문제점들로 인해 많은 논란을 빚고 있다. 본고에서는 이러한 구글도서검색과 관련하여 도서관계가 취해야 할 대응방안을 정리하여 제시하였다.

• 한국멀티미디어학회논문지
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• 제25권10호
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• pp.1416-1432
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• 2022

The access control system is a system that allows users to selectively enter the building by granting an access key to the user for security. Access keys with weak security are easily exposed to attackers and cannot properly perform the role that authenticates users. Access code keys should be protected from forgery or spoofing. For this reason, access key verification service models is important in security. However, most models manage all access keys on one central server. This method not only interrupts all services due to server errors, but also risks forgery and spoofing in the process of transmitting access keys. Therefore, blockchain algorithms are used to reduce this risk. This paper proposes a blockchain-based access key verification service model that used distributed stored blockchain gateways on storing access keys and authenticates the user's identity based on them. To evaluate the performance of this model, an experiment was conducted to confirm the performance of the access key forgery recovery rate and the blockchain network performance. As a result, the proposed method is 100% forgery recovery rate, and the registration and verification process is evaluated at 387.58 TPS and 136.66 TPS.

• 산업경영시스템학회지
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• 제33권4호
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• pp.130-137
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• 2010

This paper analyzes the main factors affecting user selection of a small-sum electronic payment system using survey data of 396 users. Several findings emerge. First, users consider three pillars and eight factors in adopting a new system : system features(stability, security, and flexibility), transaction cost(payment commission and settlement period), and financial capability of provider(stability of financial structure, risk management capability, and funding capability). Second, the stability of the financial structure of the system provider is the most important factor to user acceptance of a new e-payment system. Users tend to consider uncertainty risk more seriously than transaction cost. This reflects the reality that electronic payment system service industry has not fully fledged yet. Third, some moderating effects exist according to payment methods and business usages. As for payment methods, speedy settlement cycle for wired/wireless phone payment, system stability for credit card and account transfer payment, and security for advance payment means are crucial factors. As for business usages, the stability of financial structure for online game content, system stability for music and video content, proxy payment commission for e-learning content, flexibility of the payment system for digital adult content, and security for public services are decisive ones.

• 한국정보시스템학회지:정보시스템연구
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• 제31권3호
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• pp.131-152
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• 2022

Purpose The purpose of this study was to investigate the intention of using a news media platform using block chain through media company workers in a situation where various platform services using block chain are being newly released in the media industry. Therefore, in this paper, we intend to explore the development direction of the news media platform service using the block chain in the future by deriving implications through the characteristics of the block chain, user characteristics, and self-determination factors. Design/methodology/approach This study conducted a survey on the main characteristics of blockchain, user characteristics, self-determination, resistance to innovation, etc., and designed a research model by integrating factors on the continuity of intention to use the news media platform. Findings According to the empirical analysis result, in this study, it was confirmed that the intention to use the blockchain news media platform is significantly related to decentralization, which is a characteristic variable of the blockchain, perceived risk, which is a user characteristic variable, and competence and relationship, which is a self-determination variable. In addition, it was confirmed that it affects the perceived ease of use with respect to the intention to use. In addition, in this study, news writers write more careful articles as they cannot edit articles once written, which can contribute to improving the quality of news content.

• 디지털콘텐츠학회 논문지
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• 제11권1호
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• pp.105-115
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• 2010

검색엔진들은 사용자로부터 질의어를 전송받아 질의어와 관련이 가장 높은 웹 문서들을 보여주게 된다. 하지만 검색엔진이 사용자의 질의어만 가지고 사용자의 의도를 파악하여 정확한 웹 문서를 제공하기는 어렵다. 따라서 검식 엔진 시스템은 다양한 개인화 방법을 사용하여 각 사용자가 원하는 검색 결과를 보여주기 위해 노력한다. 본 논문에서는 개인화 검색을 위해 '폭소노미'를 기반으로 사용자에게 적합한 질의어를 추천해 주는 방법을 제안한다. 또한 이러한 개인화된 검색 결과를 제공하는 시스템이 가질 수 있는 프라이버시 침해 위험성을 제거하면서도 검색 서비스 제공자 입장에서는 사용자 정보를 활용한 다양한 서비스(개인화 광고등) 제공이 가능하도록 하는 개인화 검색 서비스 구조를 제안한다.

• Journal of the Korean Data and Information Science Society
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• 제26권5호
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• pp.1097-1104
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• 2015

급격한 사회 경제적인 성장은 긍정적인 결과를 가져왔지만 동시에 꾸준히 증가하는 범죄로 인하여 안전한 귀가에 대한 관심이 증가하였다. 범죄 동향 및 범죄 유형을 분석하고 이를 토대로 시민들의 안전을 보장하기 위한 연구가 진행되고 있다. 범죄 예방을 위한 대안이 큰 효과를 발휘하기 위해서 범죄위험도 산출에 대한 연구가 필요하다. 따라서 본 논문은 샌프란시스코 주정부에서 제공하는 범죄 데이터와 FBI (Federal Bureau of Investigation)의 피해자 데이터를 사용하여 범죄 위험도 계산식을 제안하고자 한다. 남자, 여자, 노인, 미성년자 등의 사용자 유형별로 범죄 유형을 분석하여 사용자에 따라 다른 가중치를 부여하고, 범죄 위험도를 계산하였다. 최종적으로 계산된 범죄 위험도에 따라 사용자 유형별로 다른 경로를 제안하게 된다.