• 한국멀티미디어학회논문지
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• 제7권8호
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• pp.1017-1024
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• 2004

유비쿼터스 시스템은 컨텍스트에 프로액티브하게 반응할 수 있는 지능적인 환경과 시스템이 필요하다. 본 논문은 컨텍스트 패턴을 이용한 프로액티브 검색 기법을 제안한다. 사용자의 컨텍스트 값이 변경될 때마다 그에 맞는 새로운 정보가 프로액티브하게 사용자에게 전송된다. 프로액티브 검색을 위해 데이터마이닝 기법 중에서 순차 패턴 기법과 연관 규칙 기법을 이용하여 컨텍스트 패턴을 추출하고, 추출된 패턴을 사용하여 가까운 미래에 사용하게 될 정보만을 저장함으로써 유비쿼터스 컴퓨팅에서 많이 사용되는 모바일 장치에서의 저장 공간의 제약과 데이터 전송 속도의 제약을 극복한다. 제안한 기법에 관한 알고리즘을 제시하고, 이에 대한 예를 보이고, 본 논문에서 제안하는 기법의 효율성을 몇 가지 실험을 통하여 평가한다.

• 한국콘텐츠학회논문지
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• 제7권12호
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• pp.283-291
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• 2007

유비쿼터스 컴퓨팅의 시대로 접어들면서, 컴퓨터 시스템은 언제 어디서나 우리의 일상생활에서 필요로 하는 적절한 서비스와 정보를 제공할 수 있게 되었다. 이러한 유비쿼터스 컴퓨팅은 언제 어디서나 학습을 할 수 있는 유비쿼터스 학습의 개념으로 발전시켰다. 본 논문에서는 기존의 ERSS(Korea's Educational Resources Sharing System)를 발전시켜, 유비쿼터스 컴퓨팅 기술이 적용된 U-스쿨을 위한 프레임워크를 제안한다. 제안된 프레임워크는 기존의 ERSS를 기반으로 하여 모바일 기술, 센서 단말 기술과 상황 인식 기술을 적용하였고 사용자 중심의 시나리오를 사용하여 사용자 중심의 러닝 환경을 제공한다. 특히 유비쿼터스 교육 환경에서의 상황인식 서비스는 학생, 교사, 객체 및 환경의 동적인 상황 정보를 기반으로 즉시 학습 및 개인별 맞춤 학습에 적용될 수 있다.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.55-60
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• 2005

Ubiquitous computing environment means the computing environment that has taken its position so closely with the ordinary living so much like air or water. In building up the U-Korea, one of the important issues is the social issue from the drastic increase of senior population. The contemporary society has its distinct trend in increase of senior household following the nuclear family orientation, increase of working parents with the advancement of women in society, unable to support seniors for long distance or short distance of business trip and other reasons that the need of senior welfare has been ever more felt. Accordingly, the Ministry of Government Affairs and Home Administration has developed the wireless paging system to make prompt response system for 119 Rescue when the single senior is encountered with emergency situation that is has been widely provided for the socially neglected people such as single senior, the disabled persons and others. Currently, the wireless paging system is operated as the sub-system for emergency rescue information system, but due to the lack of reliability of product, problems of terminal portable transmitter, receptor and others, rejection of beneficiary and lack of knowledge in use, insufficient management and supervision of managing officers, the efficiency has been declined that there is a need of development for the system. Therefore, this study proposes the context aware information structure of the subject of ubiquitous wireless paging system required for the development of the wireless paging system model of ubiquitous environment that improved the problems of currently operated wireless paging system.

• 통상정보연구
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• 제10권4호
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• pp.153-169
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• 2008

The purpose of this paper is to review the major issues of between electronic trade and Ubiquitous computing. The rapidly developed environment by ubiquitous computing make the paradigm form e-trade to u-trade. This Article suggests an a-trade performance framework based on both field and literatures surveys. We propose some research subjects as well as practical implications for improving the performance of global c-trade under ubiquitous.

• Journal of Ubiquitous Convergence Technology
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• 제1권1호
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• pp.23-27
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• 2007

Fruition for a diverse uIT(Ubiquitous Information Technology) service is currently required through the convergence of what is known as ubiquitous computing technology. In recent years, with the rapid growth of the need for information services, heavier demands have been made upon the supply of high-quality multimedia services that require a high bandwidth. Today, various home network solutions have been proposed to manage these service smoothly and a system able to deal with various types of network traffic without delays. In addition, in established home network environments that mix wired and wireless networks, along with the steady evolution of wireless network technology and the earnest development of ubiquitous computing technology, sensor-based wireless networks have emerged as a core solution for home networks. In this paper, a sensor network-based home control system supporting the next generation home gateway system for ubiquitous home environments is designed and implemented.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2005년도 공동추계학술대회
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• pp.183-192
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• 2005

Recently, community computing has been proposed for group formation and group decision-making. However, legacy community computing systems do not support group need identification for ad hoc group formation, which would be one of key features of ubiquitous decision support systems and services. Hence, this paper aims to provide a multi-agent based methodology to enable nomadic community computing which supports ad hoc need identification and group formation. Focusing on supporting group decision-making of relatively small sized multiple individual in a community, the methodology copes with the following three characteristics: (1) ad hoc group formation, (2) context-aware group need identification, and (3) using mobile devices working in- and out-doors. NAMA-US, an RFID-based prototype system, has been developed to show the feasibility of the idea proposed in this paper.

• 한국정보과학회논문지:시스템및이론
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• 제32권11_12호
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• pp.566-577
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• 2005

유비쿼터스 컴퓨팅은 네트워크로 상호연결된 프로세서로 구성되며, 하나 이상의 컴퓨터로 이루어진다. 따라서 한 시스템의 단일 컴포넌트 뿐만 아니라 전체 시스템의 가용도를 유지할 수 있어야만 한다. 본 연구에서는 사람의 간섭을 최소화하면서 예기치 못한 결함이 발생하여도 서비스를 지속적으로 제공할 수 있는 능력을 시스템에 부여하기 위한 오토노믹 자가 관리 기법을 제안하고 설계한다. 또한 시스템 로그 분석 결과를 통한 서비스 부하 모델을 근간으로 제안한 메커니즘의 효율성을 검증한다.

• International Journal of Contents
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• 제2권1호
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• pp.9-16
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• 2006

Recently many researches are investigating for ubiquitous computing and network. In the real world many sensor devices must be equipped to provide many services for users. To make computing environment easy and more user friendly, middleware system not only hides all complexities (network, system, services, etc), but also needs to have efficient context inference scheme and system reconfiguration capability. In this paper we suggest context-aware middleware design for sensor network which provides efficient computing environment for end-users. We also present XML based implementation of our system.

• 한국콘텐츠학회논문지
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• 제7권7호
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• pp.153-160
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• 2007

유비쿼터스 컴퓨팅과 유비쿼터스 네트워크를 통해 새롭고 다양한 서비스가 창출되고 있다. 특히, 언제 어디서나 사람과 사물 같은 객체의 위치를 인식하고, 이를 기반으로 유용한 서비스를 제공하는 유비쿼터스 위치기반 서비스(Ubiquitous Location Based Services: u-LBS)가 중요한 서비스로 대두되고 있다. 본 논문에서는 개발한 eCRM 모바일 마케팅 시스템은 기존에 기업들이 eCRM을 이용하여서 고객 마케팅하는데, 이를 보다 더 효율적으로 하기 위해서 u-LBS 기반 기술을 이용하여 eCRM 모바일 마케팅 시스템을 개발하였다.

• ETRI Journal
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• 제29권2호
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• pp.169-178
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• 2007

With the advent of ubiquitous computing environments, it has become increasingly important for applications to take full advantage of contextual information, such as the user's location, to offer greater services to the user without any explicit requests. In this paper, we propose context-aware active services based on context-aware middleware for URC systems (CAMUS). The CAMUS is a middleware that provides context-aware applications with a development and execution methodology. Accordingly, the applications based on CAMUS respond in a timely fashion to contextual information. This paper presents the system architecture of CAMUS and illustrates the content recommendation and control service agents with the properties, operations, and tasks for context-aware active services. To evaluate CAMUS, we apply the proposed active services to a TV application domain. We implement and experiment with a TV content recommendation service agent, a control service agent, and TV tasks based on CAMUS. The implemented content recommendation service agent divides the user's preferences into common and specific models to apply other recommendations and applications easily, including the TV content recommendations.