• Journal of Information Processing Systems
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• 제6권2호
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• pp.185-196
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• 2010

This paper proposes a personal information protection model that allows a user to regulate his or her own personal information and privacy protection policies to receive services provided by a service provider without having to reveal personal information in a way that the user is opposed to. When the user needs to receive a service that requires personal information, the user will only reveal personal information that they find acceptable and for uses that they agree with. Users receive desired services from the service provider only when there is agreement between the user's and the service provider's security policies. Moreover, the proposed model utilizes a mobile agent that is transmitted from the user's personal space, providing the user with complete control over their privacy protection. In addition, the mobile agent is itself a self-destructing program that eliminates the possibility of personal information being leaked. The mobile agent described in this paper allows users to truly control access to their personal information.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2007년도 학술대회 1부
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• pp.624-629
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• 2007

Digital Multimedia Broadcasting (DMB) is a digital radio transmission system for sending multimedia such as radio, TV, and data casting to mobile devices. Nowadays, DMB specifications are the major standard for digital broadcasting and have been establishing for bidirectional service using MPEG-4 system. But there has been only some simple demonstrated system for this bidirectional services. In this paper, we introduce bidirectional DMB data service system that provides the interaction between the user and DMB server without any additional equipment such as web server. The proposed bidirectional DMB system can capture and send user interaction information and response through the existing DMB transmission channel, finally update the original contents. The action event from the user is the most important thing in developing the bidirectional DMB system. Therefor, capturing the event data from the user is the first step we need to do for the bidirectional DMB service. In this paper, we propose an interaction manager module for the user events. This system will extract the user events and make a plan to update the original scene with the server's reaction information.

• Journal of Information Technology Applications and Management
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• 제16권4호
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• pp.167-184
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• 2009

New internet trend, such as Web 2.0, has brought about new roles of users and changes in the web ecosystem. In the age of information overload like nowadays, activities in the brand community sites help to make more reasonable decisions in choosing certain brands and products. In order to examine organizational strategic aspects of brand community, this study examine (1) what difference exists in user satisfaction according to the brand community types (the user-initiated type and the corporate-established type), and (2) which dimensions of service quality affect brand community users' satisfaction. Research findings show that types of brand community influence perceived user satisfaction, and tangibility, reliability, interactivity, and stability dimensions of service quality make a positive influence on user satisfaction as well. Practical implications for managing brand community sites in marketing perspectives are further discussed.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권2호
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• pp.174-190
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• 2010

In ubiquitous computing, invisible devices and software are connected to one another to provide convenient services to users [1][2]. Users hope to obtain a personalized service which is composed of customized devices among sharable devices in a ubiquitous smart space (which is called USS in this paper). However, the situations of each user are different and user preferences also are various. Although users request the same service in the same USS, the most suitable devices for composing the service are different for each user. For these user requirements, this paper proposes a device recommender system which infers and recommends customized devices for composing a user required service. The objective of this paper is the development of the systems for recommending devices through context-aware inference in peer-to-peer environments. For this goal, this paper considers the context and user preference. Also I implement a prototype system and test performance on the real ubiquitous mobile object (UMO).

• 한국컴퓨터정보학회논문지
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• 제8권2호
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• pp.122-128
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• 2003

무선인터넷을 개발하는 방법은 여러 가지 개발방법이 있다. 그 중 대표적인 것으로 WAP(Wireless Application Protocol) 기반 서비스와 자바 기반 서비스가 있다. WAP 기반은 사용자에게 한정된 편이성을 제공하지만 자바 기반의 무선 인터넷은 사용자에게 많은 편이성과 GUI(Graphic User Interface)를 지원하여 쉽게 접근 할 수 있게 한다. 본 논문에서는 WAP 기반 애플리케이션 개발방법과 자바 기반 애플리케이션 개발 방법을 제시하며, 실험을 통해 두 시스템간의 성능을 비교한다.

• Journal of Information Technology Applications and Management
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• 제17권1호
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• pp.55-81
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• 2010

ASP service users' needs for flexible and customized services to deal with changes in business environments and user contexts seems to be appealing due to the progress of technology and IT paradigm such as ubiquitous computing and web 2.0. Through the lens of expectancy confirmation and flexibility, we explored factors that influence users' repurchase intent and organizational benefit in ASP services. With an empirical study, we examined information quality, service quality, flexibility, customization, user satisfaction, trust in ASP services can contribute to the repurchase intent and organizational benefit. In addition to, business type and company size are added to the research model as control variables for user satisfaction, trust, and repurchase intent. Our findings suggested that the service quality and flexibility significantly were cruicial determinant of user satisfaction in ASP services. Furthermore, user satisfaction significantly influenceS repurchase intent, and organization benefits were affected by repurchase intent. This study has important implications for academic researchers and practitioners who seek to understand factors that affect ASP service users' repurchase intent and organization benefits.

• 한국산업융합학회 논문집
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• 제27권2_2호
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• pp.343-356
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• 2024

Super app is an application that provides a variety of services in a unified interface within a single platform. With the acceleration of digital transformation, super apps are becoming more prevalent. This study aims to suggest service enhancement measures by analyzing the user review data before and after the transition to a super app. To this end, user review data from a payment-based super app(Shinhan Play) were collected and studied via topic modeling. Moreover, a matrix for assessing the importance and usefulness of topics is introduced, which relies on the eigenvector centrality of the inter-topic network obtained through topic modeling and the number of review recommendations. This allowed us to identify and categorize topics with high utility and impact. Prior to the transition, the factors contributing to user satisfaction included 'payment service,' 'additional service,' and 'improvement.' Following the transition, user satisfaction was associated with 'payment service' and 'integrated UX.' Conversely, dissatisfaction factors before the transition encompassed issues related to 'signup/installation,' 'payment error/response,' 'security authentication,' and 'security error.' Following the transition, user dissatisfaction arose from concerns regarding 'update/error response' and 'UX/UI.' The research results are expected to be used as a basis for establishing strategies to strengthen service competitiveness by making super app services more user-oriented.

• 지능정보연구
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• 제18권3호
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• pp.35-51
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• 2012

클라우드 컴퓨팅은 컴퓨팅 자원에 대해 확장 가능한 요구중심의 서비스를 인터넷상에서 제공하는 인터넷 기반의 컴퓨팅이라 할 수 있다. 이러한 환경에서 서비스 사용자가 만족하는 서비스를 선정하여 제공하는 문제는 인터넷과 모바일 기술의 발전에 따라 향후에 다양하고 수많은 클라우드 서비스가 제공되는 경우 매우 중요한 이슈중의 하나가 된다. 과거 연구의 대부분은 요구사항과 연관된 개념의 유사성을 기반으로 하거나 사용자 요구사항의 다양성이 결여되어 있어 사용자의 만족도 향상에 한계를 보이고 있다. 본 논문에서 제안하는 방안은 서비스 만족도 향상을 위해 속성의 개념 유사성 대신에 서비스 속성의 기능적 포함 관계와 규격 등을 기반으로 구성되는 서비스 속성 그래프(Service Attribute Graph : SAG)를 도입하여 사용한다. 뿐만 아니라, 다양한 사용자 선호도를 반영하고 문자, 숫자, 부울린 등 여러 가지 속성 값 유형들을 고려함으로서 서비스 속성의 다양성을 지원한다. 본 논문의 가장 큰 의미는 다른 연구들과 달리 여러 가지 사용자 선호도를 통합적으로 고려하면서 그래프 기반의 선정 방안을 처음으로 제시하고 있다는 점이다.

• 한국ITS학회 논문지
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• 제8권1호
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• pp.119-126
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• 2009

최근 개개인의 취향이나 특성을 고려하여 자동으로 사용자에게 정보를 찾아주거나 추천해주는 추천 서비스 시스템이 많이 개발되고 있다. 하지만 사용자의 상황에 따른 선호도를 고려하지 않을 경우 정확한 추천이 힘든 단점이 있다. 따라서 본 논문에서는 사용자의 상황에 따른 선호도를 고려하여 정확한 추천을 할 수 있는 필터링 방법을 제안하였다. 이를 위해 상황에 따른 사용자 선호도를 구하고 피어슨 상관계수를 이용하여 사용자의 상황별 오브젝트 선호도를 구하였다. 실험 결과, 기존의 서비스 시스템들과 비교하여 precision은 11%, 2%, recall은 8%, 4% 향상되었으며, 전체적으로 precision은 77%, recall은 53%로 나타났다.

• 한국기록관리학회지
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• 제9권1호
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• pp.77-98
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• 2009

본 연구는 '역대 대통령 웹기록 서비스'에 대한 이용자들의 만족도를 조사하여 이용 만족도에 영향을 미치는 요인을 분석하고, 검증과정에서 나타난 웹기록 서비스의 문제점 지적 및 개선 방안 모색을 목적으로 한다. 이용자 만족도를 측정하기 위해서 정보품질, 서비스품질, 시스템품질, 이용자만족의 네 가지 기본적인 차원과 이용자충성도와 이용자불평의 두 가지 부가적인 차원으로 구성된 정보시스템 평가 모형을 사용하였다. 분석결과 정보품질과 시스템품질 만족도가 각각 이용자의 전반적인 만족도에 통계적으로 유의한 영향을 미치는 것으로 나타났고, 이용자들의 계속적인 이용과 관련하여서는 정보품질과 서비스품질, 이용만족도가 유의한 영향을 미치는 것으로 나타났다.