• Journal of information and communication convergence engineering
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• 제9권1호
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• pp.1-5
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• 2011

Everyday, technology is evolved in many different disciplines. Computer and smart devices revolution take part of the evolved technology that continuously promising new features. Moreover, social networks services recently become widely popular, which most people in the world become a social-network-fond. In addition to the revolution of the evolved technology and social networks services, ubiquitousness is taking significant part in our daily lives. Although, there are many e-learning systems already existed, which use Internet technology along with a Web technology to provide education in various ways, in despite of that, there is no such existing system exploits the usefulness of smart devices along with the legacy of the online social networks besides the power of the ubiquitous computing technology. Therefore, we propose a smart device application, which fills the gap that has been missing in the recent contemporary era. It is an application that runs on smart devices particularly Smartphone devices; we call our system “Smart Device based Social E-learning System(SDES)”. We have preliminary implemented our system on Android OS. In this paper, we intentionally propose the system in order to ease the way people learn, to provide interactive accessibility in our system, and to utilize the advanced technology more wisely.

• 제어로봇시스템학회논문지
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• 제12궈1호
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• pp.60-65
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• 2006

Recently, various ubiquitous networking services are developed and implemented for easy living. In general, new ubiquitous networking services require the new infrastructure including equipments and devices. However, it is difficult to replace existing infrastructure and devices with new ones in the home or office because of cost and maintenance problems. In this paper, we developed small-size web based RF wireless communication systems for sensor network applications. The designed RF systems are implemented using commercial system on a chip (SoC) on existing infrastructure and devices. The developed systems are tested for light control and temperature sensing and they are applied to sensor network training courses for students and engineer as well as various practical applications.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
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• pp.497-497
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• 2006

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1543-1548
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• 2008

Ubiquitous technology is the trend towards increasingly ubiquitous, connected computing devices in the environment, a trend being brought about by a convergence of advanced electronic - and particularly, wireless - technologies and the internet. Ubiquitous technology is pervasive in nature and unobtrusively embedded in the environment, completely connected, intuitive, effortlessly portable, and constantly available. The object of this paper is to describe the strategy plan for Ubiquitous-Urban Transit Total Information System.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.253-253
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• 2004

• ETRI Journal
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• 제27권6호
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• pp.666-676
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• 2005

In recent years, motivated by the emergence of ubiquitous computing technologies, a new class of networked robots, ubiquitous robots, has been introduced. The Ubiquitous Robotic Companion (URC) is our conceptual vision of ubiquitous service robots that provide users with the services they need, anytime and anywhere in ubiquitous computing environments. To realize the vision of URC, one of the essential requirements for robotic systems is to support ubiquity of services: that is, a robot service must be always available even though there are changes in the service environments. Specifically robotic systems need to be automatically interoperable with sensors and devices in current service environments, rather than statically preprogrammed for them. In this paper, the design and implementation of a semantic-based ubiquitous robotic space (SemanticURS) is presented. SemanticURS enables automated integration of networked robots into ubiquitous computing environments exploiting Semantic Web Services and AI-based planning technologies.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권5호
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• pp.938-958
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• 2011

Ubiquitous web services have been expanding in various business areas with the evolution of wireless Internet technologies, accessible and usable with a variety of mobile Internet devices such as smart phones. Ubiquitous mobile-web information services can be evaluated for accessibility and usability with the mobile Internet devices interacting with mobile-web information servers. In human mobile-web activity, a web server could be a unified center for mobile-web interaction services as well as for real-time estimation and analysis of mobile-web interaction sessions. We present a real-time estimation and analysis scheme for time-based accessibility and usability in ubiquitous mobile-web services. With real-time estimation/analysis of sessions in a mobile-web server, we estimated the time-based accessibility and usability for comparison between different web services as well as for applications in mobile cloud computing services. We present empirical results based on the implementation of the real-time estimation/analysis scheme.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.763-764
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• 2006

The rapid growth of Hardware technologies and Network fitted to us Ubiquitous Computing Life[1]. Ubiquitous Computing integrates computation into the environment, rather than having computers which are distinct objects. There are many computational things like a Sensor Network, RFID, GPS, Mobile devices, and so on. Ubiquitous Data Integration and Management are new paradigms. The goals of UDI Service Platform are data protection for the distributed data on pervasive computing devices and data distribution to appropriate users with best distribution policies. To implement the idea we evaluate the logical schema Cyber View that is a management tool.

• 한국멀티미디어학회논문지
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• 제8권11호
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• pp.1531-1542
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• 2005

유비쿼터스 홈 환경(UHE: Ubiquitous Home Environment)에서의 멀티미디어 서비스에서는 사용자의 직접적인 명령 없이 자동적으로 실행되는 지능화된 서비스 와 각각의 사용자에 맞는 맞춤형 서비스, 사용자 편의성 및 투명성, 이종 디바이스간 멀티미디어 콘텐츠의 상호 호환성 등의 요구사항이 증가할 것이다. 또한, 이에 적합한 멀티미디어 보호 관리 및 인증 권한관리 방식 등이 필요 할 것이다. 본 논문에서는 UHE에 적합한 인증방식을 제안$\cdot$적용하며, 이종 기기간 멀티미디어 상호 운용성을 보장하며, 센서모듈과 홈서버를 이용한 상황정보(사용자 취향 정보, 디바이스정보 등)를 지능적으로 처리하고, 투명하고 안전한 서비스를 제공할 수 있는 사용자 중심 멀티미디어서비스(UHMS: Ubiquitous Home Multimedia Service)를 제안한다.

• 한국통신학회논문지
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• 제29권4B호
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• pp.424-434
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• 2004

유비쿼터스 네트웍은 다양한 프로토콜을 사용하는 많은 디바이스로 구성되며 상호간의 유연한 연동을 필요로 한다. 본 논문에서는 유비쿼터스 네트웍 환경에서 디바이스 상호간의 신뢰성 있는 통신을 지원하기 위한 계층적 이벤트 서비스와 이를 위한 다중 이벤트를 제안한다. 본 논문에서 제안된 이벤트 서비스는 다양한 통신 방법을 지원하기 위해 물리적인 위치 및 논리적인 위치에 따라 디바이스를 분류하였으며 분산 네트웍 환경에서 나타나는 이벤트 전송의 중복을 제거하여 네트웍 부하를 줄이며 이벤트 전송 과정에서 발생 가능한 오류에 대하여 신뢰성있는 처리를 보장하도록 설계 구현되었다. 제안된 이벤트 서비스는 홈 네트웍 사례 연구를 통하여 직접 구현되었으며 성능을 평가하였다.