• IE interfaces
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• v.21 no.1
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• pp.65-74
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• 2008

In the future, the ubiquitous computing environment will provide users with context-aware services, intelligently interacting with omnipresent resources and surrounding environments at any location and time. Therefore, the ubiquitous computing environment requires context-aware applications in order to gather and analyze context information in various situations. However, existing context-aware applications have mainly focused on providing services and adapting themselves to users based on user related contexts. But this environment requires not only user related contexts but also Quality-of-Service (QoS) related contexts. In this paper we propose a frame-work for supporting user-oriented QoS in ubiquitous environments. The proposed approach adopts a semantic ontology and a neural network algorithm in order to reason about explicit and uncertain contexts. We also show the possibility of applying the framework to real environments such as collaborative engineering service, automobile maintenance service and ubiquitous home service.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.11a
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• pp.162-167
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• 2009

With the introduction of the ubiquitous technology, the housing culture centers of construction companies have demonstrated future housing image and technology. However, ubiquitous home services are technology oriented items. The purpose of this study was to identify u- services which were realized in domestic future housing and to compare those with services the residents needed greatly refer to researches related to demand for u-service. For this study, field studies were conducted with 3 domestic future housings and precedent studies on demand for u-service were analyzed according to the standard of residents' demand. The results of the study showed that residents prefer u-services for security and control of indoor environment for housework and leisure life. As a result, u-services which residents needed mainly did not correspond with those that were displayed in future housing.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2005.11a
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• pp.147-156
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• 2005

In developing the ubiquitous computing technology based services (ubiquitous services), evaluating how much value of those services is created or added is very crucial. The efforts to evaluate the ubiquitous services have been progressed in two perspectives - technical perspective and behavioral perspective. Despite its importance, however, the methodologies which integrate both perspectives have been still very rare. Hence, this paper aims perspectives have been still very rare. Hence, this paper aims to propose an integrated ubiquitous service valuation methodology based on the multi-layered approach including technical and behavioral perspectives. To do so, we conducted a case study with currently existing location based service (LBS) such as navigation systems by conducting focus group interview (FGI) and field survey.

• Journal of KIISE:Software and Applications
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• v.33 no.3
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• pp.356-364
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• 2006

'Ubiquitous Computing' is the most important paradigm of the next generation Information-Communication technology. The one of important problems to develop ubiquitous computing service system get hold of relations between times of transfer objects and events of transfer objects. Another problem is what reason transfer-pattern through location data of transfer objects. In this paper, we propose an approach to offer temporal-relation service in ubiquitous computing environment. The first is temporal reasoning in service viewpoint. The second is temporal reasoning to record user's preference. Users have preferences that are closely connected with time. These preferences are recorded at user profile. Therefore, the user profile-based ubiquitous service system can offer suitable service to users.

• Journal of Korea Society of Digital Industry and Information Management
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• v.7 no.2
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• pp.19-27
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• 2011

Recent development of information technologies produces a lot of community services. Social Network Service is one of the community services on the world wide webs. In the Social Network Service, a user can register other users as friends and enjoy communication through a virtual message. Previous researches show a few social service methods using manually generated tagging. However, the manual social tagging is not widely used in many social network services. Moreover, they do not consider ubiquitous computing environment. We propose a recommendation method for social service using contexts in ubiquitous environment. Our method scores documents based on context tags and social network services. Our social scoring model is computed by both a tagging score of a document and a tagging score of a document that was tagged by a user's friends.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.887-890
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• 2007

Today, many universities are progressing research of ubiquitous campus for discrimination and the part universities constructed ubiquitous campus with telecommunication company. It is applied with campus service. But, Currently ubiquitous campus environment has two weakness. First one is Non-practicality cause of Not enough supplying related device for using service to student. And the other one is that can't support Student Oriented Service. In this paper, We studied on model that tan analysis ubiquitous utilization of student and can be Student Oriented Service. To resolve this, we realized practical service via analysis of User IT Infra.

• Spatial Information Research
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• v.15 no.3
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• pp.219-236
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• 2007

This study is intended to examine the types of U-public service that can be introduced to the public sector by making an empirical analysis on Chungju City public officials. Specially, to analyze the public officials' recognition of the types of ubiquitous public service that can be introduced to the public sector, this study investigates the utility and necessity of ubiquitous information technology when making use of it in terms of administrative concepts. To achieve study purpose, this study examines what type of U-public service is highly likely to be applied and basically has to be applied when ubiquitous information technology is applied to the current environment of Chungju City in stages.

• The Journal of the Korea Contents Association
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• v.6 no.7
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• pp.13-21
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• 2006

Context-based information services are required in ubiquitous application. In the ubiquitous application, ubiquitous commerce addresses information service that recommends items to consumers with the use of the situated contexts. This paper proposes a multi-context based information service for ubiquitous commerce. This enables a consumer to get multi-context based information efficiently by using consumer's attention for each context. The method is described and an ubiquitous commerce application prototype based on multi-context is presented. Several experiments are performed and the results verify that the proposed method's performance is better than other existing method.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.1 no.1
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• pp.71-90
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• 2006

This paper is purpose to research system use, ubiquitous convenience considering ubiquitous system and system use, ubiquitous convenience considering user satisfaction. In this study system use was signification influenced by system quality, instantly connectivity, and user satisfaction use was signification influenced by system quality, information quality. But system use was not signification influenced by information quality, service quality and ubiquitous convenience was not signification influenced by service quality, instantly connectivity.

• The Journal of Society for e-Business Studies
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• v.11 no.3
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• pp.89-108
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• 2006

This study is to survey on the status of human resource training programs related to ubiquitous technologies and services of domestic universities. So, this study develop a classification system about human resource related to ubiquitous technologies and services. We propose the implications and plans which are based on the status of human resource training programs related to ubiquitous technologies and services. Human resources related to ubiquitous technology are classified by the flow of information in ubiquitous environment. And human resources related to ubiquitous service are classified by ubiquitous user view. This study can be used to find collaboration alternatives for breeding up ubiquitous human resources and referred to analyzing on the supply and demand of ubiquotous human resources.