• 한국IT서비스학회:학술대회논문집
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• 2010.05a
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• pp.171-176
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• 2010

현재 우리는 Ubiquitous IT기술을 활용한 편의시설이 곳곳에 적용되어 가고 있는 도시에 서 살아가고 있으며, 이러한 Ubiquitous IT기술은 발전에 발전을 거듭하여 우리가 느끼지 못하는 곳까지 확대되어 가고 있다. IT산업과 도시산업의 융·복합화을 통해 형성되는 새로운 도시의 개념인 u-City는 다양한 u-Service의 제공을 통해 국민의 삶을 향상시키는데 의의가 있다. 정부에서도 Ubiquitous 활성화 정책과 u-City 관련 산업 육성을 위해 노력하고 있으며, 이에 Ubiquitous 환경 및 정보인프라 구축등 기술적 구현은 빠르게 발전되고 있다. 그러나 u-Service의 효과를 체험하고 보다나은 서비스가 제공될 수 있도록 정보를 제공해 주어야 하는 소비자(국민)들은 계층별 정보격차로 인해 체감할 수 있는 u-Service가 미흡한 것으로 파악된다. 따라서 본 논문에서는 정보격차 분석을 통해 계층별 소비자 맞춤형 u-Service 적용방안을 제시하고자 한다. 이에 본 논문은 u-Service의 기본단위인 도시에서 생겨나는 정보격차 속성을 이해하고, 정보격차의 주체별 분석을 통하여 올바른 u-Service를 적용할 수 있는 효율적인 방안을 제시하고자 한다.

• Proceedings of the IEEK Conference
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• summer
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• pp.52-56
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• 2004

Computing today is becoming ubiquitous. In such ubiquitous computing environments, entities expect to access resources and services at any time from anywhere. Therefore, the question rises of how to establish trust relationship in previously unknown devices or resources with such environment. After reviewing a model to delegate trust to communicating entities in ubiquitous environment and its security problems, we present a new model for secure delegation over communication entities. We adopt two-party signature scheme as cryptographic primitives. Additionally, we apply threshold cryptosystems to our model for more secure enhancement.

• International Journal of Internet, Broadcasting and Communication
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• v.5 no.1
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• pp.9-13
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• 2013

This paper presents the concepts of ubiquitous computing technology to construct a ubiquitous learning environment that enables learning to take place anywhere at any time. This ubiquitous learning environment is described as an environment that supports students' learning using digital media in geographically distributed environments. The u-learning model is a web-based e-learning system that could enable learners to acquire knowledge and skills through interaction between them and the ubiquitous learning environment. Students are allowed to be in an environment of their interest. The communication between devices and the embedded computers in the environment allows learner to learn while they are moving, hence, attaching them to their learning environment.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.2
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• pp.248-253
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• 2009

In this paper, we have studied about the ubiquitous service map for the effective u-City service providing. Through the research, we are going to propose the fact that it can be implemented ubiquitous services according to city characteristics. The proposed research could make it possible to be an intelligent decision making system by city characteristics. Also, nation, local government, companies can be assigned their appropriate load according to the proposed system for the effective u-City services.

• Journal of Digital Convergence
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• v.1 no.1
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• pp.93-112
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• 2003

This thesis reviewed following issues that are required in the policies and reaction strategies in the ubiquitous computing environment that continuously create domino effect of changes on the technology, services and business models. - Search for solutions in relation to timing difference of customer needs and emerging technology. - Deployment of management structure that is capable to adapt and react to environmental changes - Re-establishment or re-structuring of policies with the changes to portfolios. Thus, for the IT industry and ubiquitous computing strategies and policies which is based on intangble services and businesses that are accompanied with domino effect changes, must firstly consider above factors then establish the systematic architecture.

• Korean Journal of Computational Design and Engineering
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• v.11 no.5
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• pp.365-374
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• 2006

The ubiquitous environment is to support people in their everyday life in an inconspicuous and unobtrusive way. This environment requires information such as the person, his/her preferences, and habits which is available in the ubiquitous system. In this paper, we propose the context aware system that can provide the tailored information service for user in ubiquitous computing environment. Our system architecture is divided into 4 domain models such as context awareness, presentation, interface and inference domain. Each domain model can perform some predefined tasks independently. And we suggest the hybrid algorithm combined with fuzzy and Bayesian method in order to reason what is the suitable information for user. We show the possibility for the real application through applying the system to the TGA (Tour Guide Assistant) for Kyoungju historical site.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2005.11a
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• pp.63-66
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• 2005

The purpose of this study is to suggest the modeling of ubiquitous environments according to the analysis of user's behaviors focused on the living area within the house. Recently, with appearing 'Ubiquitous environments', the applications of ubiquitous technologies on the our environment adopt a new paradigm. This new paradigm leads to the possibility of creating more intellectual dwelling environment according to user's behaviors. This paper suggests to change our dwelling by considering both engineering technology and the character of dwelling, because the house should provide causes humans with comfortability. Therefore, we need to understand user's behaviors in the dwelling, towards user friendly environment. Also, it very important for us to configure proper sensors and technologies by the priority based on user's behaviors. To sum up, this study is aimed to analyze user's behaviors and then, to suggest the guideline for users offering optimal ubiquitous environments.

• 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.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.1032-1034
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• 2014

표준 웹 환경의 확산으로 HTML5를 기반으로 웹 저작을 지원하는 많은 WYSIWYG HTML5 저작도구들이 등장하고 있다. 그러나 대부분의 WYSIWYG HTML5 저작도구는 컴포넌트 이벤트에 대한 기본적인 함수 작성 기능만 제공 할 뿐 컴포넌트 제어를 위한 코드 어시스트 기능을 제공하지 않고 있다. 본 논문에서는 이클립스 JSDT(JavaScript Development Tools) 코드 어시스트개념에 대해 기술하고, 이를 기반으로 WYSIWYG HTML5 저작도구에서 제공하는 컴포넌트 제어를 위해 코드 어시스트 가능을 구현하였다. 이로 인하여 WYSIWYG HTML5 저작도구에서 제공하는 컴포넌트에 대한 사용자들의 접근성과 개발 생산성 증대가 기대된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.1039-1041
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• 2014

HTML5의 표준 웹 환경 확산과 스마트폰 점유율 상승과 더불어 다양한 디바이스에서도 동일한 화면을 제공하는 반응형 웹이 부각되고 있다. 반응형 웹을 적용하는 사이트가 지속적으로 증가하고 있으며, 특정 분야에 치중되지 않고 다양한 분야에서 활용되고 있다. 본 논문에서는 반응형 웹 디자인을 위한 주요 기법들에 대해 기술하고, 이를 기반으로 WYSIWYG HTML5 저작도구에서 컨텐츠별 페이지 레이아웃 설계 없이 태블릿과 모바일 페이지를 자동으로 생성할 수 있는 사용자 직관적인 반응형 레이아웃을 설계하였다.