• 반도체디스플레이기술학회지
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• 제19권2호
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• pp.96-99
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• 2020

According to brilliant development of smart devices, many related services are being devised. And, almost every service is designed to provide user-centric services based on personal information. In this situation, to prevent unintentional leakage of personal information is essential. Conventionally, ID and Password system is used for the user authentication. This is a convenient method, but it has a vulnerability that can cause problems due to information leakage. To overcome these problem, many methods related to face recognition is being researched. Through this paper, we investigated the trend of user authentication through biometrics and a representative model for face recognition techniques. One is DeepFace of FaceBook and another is FaceNet of Google. Each model is based on the concept of Deep Learning and Distance Metric Learning, respectively. And also, they are based on Convolutional Neural Network (CNN) model. In the future, further research is needed on the equipment configuration requirements for practical applications and ways to provide actual personalized services.

• 한국IT서비스학회지
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• 제9권2호
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• pp.21-42
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• 2010

As digital convergence and mobile services evolve, personalization becomes one of the most important factors attracting customers. Personalization means functions offering individually customized services with relevant contents using information on individual preferences. This sort of personalized services has attracted great attention of a large part of online firms. One of representative services of such personalized services is a mobile widget service. In this study, we identified seven antecedents affecting the quality of personalized mobile widget services and empirically investigated which antecedent has a significant effect of the quality of personalized mobile widget services. In addition we carried out empirical investigation into the effect of the quality of personalized mobile widget service on user satisfaction and trust. As a result of this research, we revealed that seven variables including information services affected components of personalized services, and usefulness and perceived benefit as components of personalized services affected user trust and satisfaction for personalized services.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제12권4호
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• pp.270-276
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• 2012

With the increase in amount of data and information available on the web, there have been high demands on personalized information retrieval services to provide context-aware services for the web users. This paper proposes a novel dynamic multi-agent context-awareness user profile construction method based on ontology to incorporate concepts and properties to model the user profile. This method comprehensively considers the frequency and the specific of the concept in one document and its corresponding domain ontology to construct the user profile, based on which, a fuzzy c-means clustering method is adopted to cluster the user's interest domain, and a dynamic update policy is adopted to continuously consider the change of the users' interest. The simulation result shows that along with the gradual perfection of the our user profile, our proposed system is better than traditional semantic based retrieval system in terms of the Recall Ratio and Precision Ratio.

• 방송공학회논문지
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• 제14권4호
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• pp.463-474
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• 2009

방송 서비스에 가입자 개념을 채택함으로써, IPTV 사업자는 가입자의 결제수준을 기반으로 다양한 등급의 서비스를 제공한다. 가입자로 부터의 수입을 기반으로 하여 IPTV 사업자는 고품질의 서비스를 제공 할 수 있게 된다. 웹 브라우저 기반의 IPTV는 TV 서비스와 더불어 T-커머스 및 E-커머스 서비스도 제공하므로, 사용자는 자주 인터넷 쇼핑이나, 서비스 콘텐츠를 구입하기위해 다른 서비스 도메인에 접속하게 된다. 사용자가 구매한 서비스나 개인적인 서비스를 제공하기위하여 해당 서비스 도메인은 사용자 인증을 요구하게 된다. 현존하는 인증시스템은 한 도메인에서 다른 도메인으로 사용자가 이동했을 경우 재인증 절차를 요구하므로, IPTV 환경에 적절하지 않다. SSO(Single sign-on)구조는 한번 인증된 사용자가 다른 서비스 도메인으로 이동했을 경우 재인증 절차를 요구하지 않는 투명한 인증 서비스를 제공한다. IPTV에서 인증이 필요한 다양한 서비스가 제공되므로, 결제가 필요한 도메인이나 개인 도메인으로 이동시에 이러한 투명한 인증 서비스가 제공되어야 한다. 본 논문에서는 IPTV 환경에 대한 새로운 사용자 인증 구조를 제시하며, 이 구조는 XML 기반의 SSO 표준인 SAML(Security Assertion Markup Language)을 통합한다. 사용자-사례 시나리오를 이용하여 제안된 구조를 검증하였다.

• 정보처리학회논문지A
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• 제16A권1호
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• pp.43-54
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• 2009

유비쿼터스 시대의 도래와 함께, 사용자 중심 서비스를 위해 HCI 요소를 최대한 활용하는 HCI 미들웨어에 대한 중요성이 점점 증가하고 있다. 이에 따라 사용자 중심 서비스를 제공하기 위한 HCI 미들웨어에 대한 여러 연구가 진행되었다. 하지만 기존의 연구들은 사용자 중심 서비스 제공에 반드시 필요한 HCI 기능들에 대한 종합적 지원이 부족하다. 본 논문에서는 사용자 중심 서비스 지원을 위한 에이전트 기반 지능형 HCI 미들웨어인 AIM(Agent-based Intelligent Middleware)을 제안한다. 먼저 기존의 여러 HCI 미들웨어들을 분석하여 HCI 미들웨어의 요구조건을 도출하고, 상황 정보 관리, 사용자 행동 패턴 추론, 동적 에이전트 생성 등을 통해 여러 HCI 기능들을 종합적으로 제공할 수 있는 AIM을 설계한다. 또한 스마트 공간에서 사용자 모달리티 기반 서비스 시나리오를 소개하고, 프로토타입 구현을 통해 소개한 미들웨어의 이점을 보인다.

• 한국정보시스템학회지:정보시스템연구
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• 제13권1호
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• pp.121-134
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• 2004

As Internet usage widely grows, online content services such as newspaper, magazine, music, game and movie are provided with a fee-based subscription. Many content services providers consider charging a usage fee into its service provisions as one of the Internet business models for increasing revenue. There are customer resistances to adopting the fee-based service provision on the Web. Previous research in information systems (IS)has focused on the analysis of adoption of information technology or systems in the individual ororganization level. No principle research has been carried out on the user adoption behavior of online content services provisions. As users actively access content services on the Web, it needs to explore user adoption behavior in different settings. Many IS researcher have employedquantitative approaches, even though they deal with the process of user behavior regarding the information technology or system. In this study, we attempt to discover how customers adopt the fee-based provision of online content services by employing grounded theory, one of the principal qualitative research methods.

• 디지털산업정보학회논문지
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• 제8권4호
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• pp.83-90
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• 2012

With the rapid growth of internet infrastructure, World Wide Web is evolving recently into various services such as cloud computing, social network services. It simply go beyond the sharing of information. It started to provide new services such as E-business, remote control or management, providing virtual services, and recently it is evolving into new services such as cloud computing and social network services. These kinds of communications through World Wide Web have been interested in and have developed user-centric customized services rather than providing provider-centric informations. In these environments, it is very important to check and analyze the user requests to a website. Especially, estimating user preferences is most important. For these reasons, analyzing web logs is being done, however, it has limitations that the most of data to analyze are based on page unit statistics. Therefore, it is not enough to evaluate user preferences only by statistics of specific page. Because recent main contents of web page design are being made of media files such as image files, and of dynamic pages utilizing the techniques of CSS, Div, iFrame etc. In this paper, large log analyzer was designed and executed to analyze web server log to estimate web contents preferences of users. With mapreduce which is based on Hadoop, large logs were analyzed and web contents preferences of media files such as image files, sounds and videos were estimated.

• 한국문헌정보학회지
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• 제49권2호
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• pp.75-109
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• 2015

본 연구에서는 정책정보 이용자의 수요 및 요구조사와 맞춤형서비스 사례분석을 기반으로 이용자맞춤형정책정보서비스 모형을 개발하고자 하였다. 이를 위해 이용자맞춤형서비스 관련 문헌분석, 사례조사, 그리고 정책정보 수요자들을 대상으로 한 설문조사를 수행하였다. 이를 기반으로 본 연구에서는 이용자맞춤형정책정보서비스가 제공해야 할 세부적인 서비스를 정보검색 및 자료제공서비스, 참고정보서비스, 정책정보 네트워크 서비스, 도서관 마케팅서비스, 개인화서비스 등으로 제안하였다.

• 한국IT서비스학회지
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• 제20권5호
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• pp.137-146
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• 2021

Recently, public participation in government policy design has been further expanded and public services perceived by users are expanding. At this time, the role of the digital government and the direction of the service to be pursued are user-centered, and above all, it is necessary to focus on the keywords of pre-emptive, preventive, and customized. In order to propose service quality improvement in the public sector, service user-centered classification and monitoring are integrated and the usability of government documents is improved. It is necessary to identify the needs of whether to provide a path for public participation. In the post-corona era, people are accessing quarantine information from the digital government every day. The government should proactively respond to the acceleration of digital transformation and the non-face-to-face demands of the people who experience non-face-to-face daily life. In order to evolve into a smart organization along with the innovation promotion plan and to provide customized services, it is necessary to use existing guides for institutional and technical improvement, along with new technology and data-based analysis, to strive for change management. The government should seek counter-measures that have advanced one step ahead by incorporating new high-tech IT with user-centered necessary services. This study aims to derive improvement plans to provide user-centered digital government service design when designing public services and collecting public opinions. Based on the e-government development model research and the existing research on user-centered service design in the public sector, institutional and technical measures are provided for the improvement of digital government service design.

• Journal of Information Processing Systems
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• 제3권2호
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• pp.82-88
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• 2007

Web services are the new building block of today's Internet, and provides interoperability among heterogeneous distributed systems. Recently in web services environment, security has become one of the most critical issues. The hackers attack one of fragile point and can misuse legitimate user privilege because all of the connected devices provide services for the user control and monitoring in real time. Also, the users of web services must temporarily delegate some or all of their rights to agents in order to perform actions on their behalf. This fact risks the exposure of user privacy information. In this paper, we propose secure delegation model based on SAML that provides confidentiality and integrity about the user information in distributed systems. In order to support privacy protection, service confidentiality, and assertion integrity, encryption and a digital signature mechanism is deployed. We build web service management server based on XACML, in order to manage services and policies of web service providers.