• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.227-231
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• 2009

The aim of the research is to focus on the cognitive principles and to achieve human-level intelligence in referring context based browser history and the Windows history. One of the major problems faced by today's computer users is insufficient and single exclusive context based reference of the browser history and the Windows history. Today we search for the browser history and Windows history in different places even though the context is the same. For e.g., When working on a research paper or preparing a business presentation, a user may require to refer many web sites on the internet and various documents on the local computer. The browser can provide only time based history. The windows document history is also time based and limited to list only few documents. Hence, we propose a tool "Cognitive Based Context Aware Reference History Management Tool" which helps to access the exclusive reference of context and time based history in one place. The tool also proposes to store image history with urls and classifies images of a specific topic accessed in different time, bookmarks management and cross browser history management. These features are very useful as we can access all related documents (doc, docx, ppt, pptx, pdf, txt, and html), web pages, images and bookmarks in one place. The tool uses the cognitive principles like classification and association to achieve the purpose.

• KIPS Transactions on Software and Data Engineering
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• v.2 no.9
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• pp.621-628
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• 2013

This paper presents a framework for context-aware smart phone applications based on Android. The mobile context-aware system is composed of a low level context collection module, a high level context generation module and a service provision module. Existing android system cannot provide an appropriate application framework to integrate these independent modules. In this paper, we provide an application framework which make each module a component, and provide appropriate services to each component. This framework hides the Android platform, so that the complexity for organical combination can be minimized and the application developers can make the mobile context-aware applications easily.

• Journal of Korea Multimedia Society
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• v.15 no.12
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• pp.1475-1484
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• 2012

Today many companies introduce new mobile office environments evolved from the recent rapid development in mobile device technologies. Most of the recent mobile office systems use a simple authentication scheme such as ID/Password. This method is easy to use, but it does not consider the user's context. Thus it cannot provide appropriate security service required by the user's proper contexts. Therefore, this paper proposes a context based authentication system which applies security level verification and uses fuzzy algorithm based on the importance of access authority control.

• Journal of Information Technology Services
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• v.10 no.4
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• pp.269-280
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• 2011

Mobile Augmented Reality (mobile AR), as one of the most prospective mobile applications, intends to provide richer experiences by annotating tags or virtual objects over the scene observed through camera embedded in a handheld device like smartphone or pad. In this paper, we analyzed the current status of the art of mobile AR and proposed a novel Points of Interest (POIs) data model based on ontology to provide context-aware information retrievals on lots of POIs data. Proposed ontology was expanded from the standard POIs data model of W3C POIs Working Group and established using OWL (Web Ontology Language) and Protege. We also proposed a context-aware mobile AR platform which can resolve three distinguished issues in current platforms : interoperability problem of POI tags, POIs data retrieval issue, and context-aware service issue.

• Journal of Computing Science and Engineering
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• v.6 no.4
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• pp.243-256
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• 2012

In this paper we present a framework for a novel kind of context-aware preference query composition whereby queries for the Preference SQL system are created. We choose a commercial e-business platform for outdoor activities as a use case and develop a context model for this domain within our framework. The suggested model considers explicit user input, domain-specific knowledge, contextual knowledge and location-based sensor data in a comprehensive approach. Aside from the theoretical background of preferences, the optimization of preference queries and our novel generator based model we give special attention to the aspects of the implementation and the practical experiences. We provide a sketch of the implementation and summarize our user studies which have been done in a joint project with an industrial partner.

• The Journal of the Korea Contents Association
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• v.5 no.3
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• pp.159-166
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• 2005

The application that the user's contexts are continuously changed over time requires an efficient information retrieval. This paper proposes a new context-differentiated information retrieval method for an efficient ubiquitous service. This enables the rapid retrieval, because of no access to the most detail information at a time. This paper describes the retrieval method, the algorithms and the experimental results.

• Hwankyungkyoyuk
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• v.18 no.2 s.27
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• pp.101-112
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• 2005

The purpose of this study is to develop environmental inquiry activities for teaching the 10th grade students in science classes of high school. The activities are developed to perform goals of environmental education for sustainable development. In order to this, activities are sequently organized in order of context of laboratory, field, and problem solving in respect of one learning topic. The object of inquiry activities in laboratory context is understanding concepts related environment and environmental pollution. The inquiry activities in field context have an object of attaining good awareness and attitude toward environment. Throughout the activities in probem solving context students are expected to have a mind of participating in environmental issues. The activities are designed to learn and use integrated science knowledge in many domains. Some activities are intended to utilize MBL(Microcomputer-based Laboratory). The ICT materials, lesson plans, instructional sheets for teaching and student' sheets for inquiry were produced to guide these activities. It is expected that this effort will contribute to cultivate environmental literate persons who have not only scientific understanding but also practical will of environmental issues.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2006.06a
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• pp.354-360
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• 2006

The purpose of this paper is to propose a securely personalized context-aware cooperative query that supports a multi-level data abstraction hierarchy and conceptual distance metric among data values, while considering privacy concerns around user context awareness. The conceptual distance expresses a semantic similarity among data values with a quantitative measure, and thus the conceptual distance enables query results to be ranked. To show the feasibility of the methodology proposed in this paper we have implemented a prototype system in the area of site search in a large-scale shopping mall.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.361-364
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• 2008

최근 언제 어디서나 컴퓨팅이 가능한 Ubiquitous Computing System 을 구현하기 위한 연구가 활발히 진행되고 있다. 또한, 이를 구현하기 위해 사용자의 상황에 따라 최적의 서비스를 제공하기 위한 상황인식 (Context-awareness) 컴퓨팅 기술 또한 많은 연구가 진행되고 있다. 본 논문에서는 Ubiquitous Computing System 을 구현하기 위해 복합 센서로부터 입력되는 다양한 상황 정보에 대해 CRS(Context Recognition Switch) 개념을 포함하여 보다 정확하고 빠르게 사용자의 상황 정보를 추출하게 된다. 또한 제안된 DOS(Dynamic and Optimal Standard) 개념으로부터 노드의 고유 속성을 분석하여 특화된 시스템 서비스가 가능한는 IEEE 802.15.4 WPAN Standard 기반의 UoC(Ubiquitous system on Chip) Architecture 를 제안하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.38-43
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• 2006

유비쿼터스 컴퓨팅 환경이 발달하면서 홈네트워크 환경의 사용자 상황을 쉽게 인식하고 사용자의 상황 정보에 따라 좀 더 지능적인 서비스를 제공 할 수 있게 되었다. 지능적 서비스를 효과적으로 구현하기 위해서는 상황 정보를 객관적으로 표현할 수 있어야 한다. 상황 정보는 개체의 상황을 특성화 하는데 사용 될 수 있는 정보를 의미한다. 본 논문에서는 홈네트워크 서비스를 효과적으로 제공하기 위하여 상태 정보를 User context, Device context, Proximity(유저와 장치간의 거리) context로 분류하고, 그 상황 정보를 효과적으로 표현할 수 있는 XML기반의 HIML(Human Interaction Markup Language)을 설계하였다. 또한 설계된 HIML 문서를 통해 다양한 플랫폼에서 작동하고, 여러 가전기기와 센서장비들의 상호작용이 가능하게 하는 미들웨어를 설계하고 그 기능을 실험하였다.