• Proceedings of the Korean Society of Computer Information Conference
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• 2013.01a
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• pp.233-236
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• 2013

현대사회가 언제 어디서나 정보를 주고 받는 유비쿼터스 사회로 변화하면서 센싱기술, 통신기술, 서비스 기술 등을 이용하여 우리가 볼 수 있는 모든 사물을 사람과 통신 가능하게 해주는 IoT기술이 부각되고 있다. IoT는 일반적으로 사람의 관여 없이 사물 간에 이루어지는 통신을 뜻하는 것으로 국내에선 개념적으로 USN기술과 흡사하다. 본 논문에서는 USN 분야 중 하나인 모바일 RFID 기술을 이용한 도서 대출 시스템을 제안하고 무선으로 정보를 주고 받는 모바일 RFID의 특성을 고려하여 태그와 리더 간의 인증 프로토콜을 제시한다.

• 프린팅코리아
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• v.11 no.11
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• pp.102-103
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• 2012

'RFID/USN코리아 2012'가 지난 9월 25일부터 27일까지 서울 삼성동 코엑스 홀C에서 개최됐다. 올해로 8회를 맞는 이번 전시회는 '스마트 센싱으로 IT융합 가속화!'라는 주제로 최근 산업전반에 확산하는 IT융합 추세에 맞춰 IT융합의 핵심기반으로서 RFID 및 USN의 중요성을 조명했다.

• Proceedings of the Korea Database Society Conference
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• 2002.10a
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• pp.60-71
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• 2002

필자는 콘텐츠비즈니스를 인간의 근원적 욕구와 니즈에 대한 해갈을 주는 핵심전략 가치로서의 콘텐트를 영화, 게임, 애니메이션, 방송, 교육, 캐릭터, 출판만화, 모바일등의 형태로 미디어믹스 기획개발상품머천다이징 서비스하고 라이센싱함으로서 재화를 취득하는 제반 거래 및 커뮤니케이션 활동이며 무한경쟁시장인 글로벌시장을 목표시장으로 한다. 라고 정의한 바 있다. (중략)

• Journal of the Korea Society of Computer and Information
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• v.20 no.4
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• pp.33-40
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• 2015

This paper presents the design and implementation of the educational remote controlled robot system including remote sensing in the embedded environment. The design of sensing information processing, software design and template design mechanism for the programming practice are introduced. LPC1769 using Cortex-M3 core as CPU, LPCXPRESSO as debugging environment, C language as firmware development language and FreeRTOS as OS are used in development environment. The control command is received via RF communication by the server and the robot system which is operated by driving the various sensors. The educational procedure is from robot demo operation program as hands-on practice and then compiling, loading of the basic robot operation program, already supplied. Thereafter the verification is checked by using the basic robot operation to allow demo operation such as hands-on-training procedure. The original protocol is designed via RF communication between server and robot system, and the satisfied performance result is presented by analyzing the robot sensing data processing.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.6
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• pp.1327-1332
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• 2011

In the mobile meteorological information services, an existing sensor system should be expanded to serve precise information. This is because of large cost problem to add the existing sensors. This thesis proposes a system architecture to construct scalable mobile meteorological information services and suggests mobile phone, sensor network, and public traffic vehicle as expended sensors. The proposed scalable sensors are compared each other and analysed the results to evaluated their strength and weakness. In this system, based on the characteristics of the sense data collected at server, a data processing methods are proposed to support efficient query processing. The proposing data processing methods have several benefits. They compress some data volume sensed by various sources on some area at some time to a logical unit. Still it could preserve same services quality.

• Journal of KIISE
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• v.43 no.7
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• pp.763-772
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• 2016

With the spread of smartphones containing multiple on-board sensors, the market for context aware applications have grown. However, due to the limited power capacity of a smartphone, users feel discontented QoS. Additionally, context aware applications require the utilization of many forms of context and sensing information. If context transition has occurred, types of needed sensors must be changed and each sensor modules need to turn on/off. In addition, excessive sensing has been found when the context decision is ambiguous. In this paper, we focus on power consumption associated with the context transition that occurs during indoor/outdoor detection, modeling the activities of the sensor associated with these contexts. And we suggest a freezing algorithm that reduces power consumption in context transition. We experiment with a commercial application that service is indoor/outdoor location tracking, measure power consumption in context transition with and without the utilization of the proposed method. We find that proposed method reduces power consumption about 20% during context transition.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.414-416
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• 2010

본 논문에서는 이동환경에서 시간에 따른 인간의 생체신호 및 인간의 생활공간에서 발생하는 감성 및 환경신호를 센싱 및 융합하여 복합 추론하고 시간과 공간에 따른 사용자의 감성변화에 반응하는 감성 서비스를 위한 모바일 감성추론기술과 감성 모바일 서비스를 위한 임베디드 단말 플랫폼의 시스템 설계에 관한 것이다.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.5
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• pp.596-600
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• 2010

This paper proposes hough transform-based semi-automatic vertex detection algorithm for object modeling on a mobile phone supporting touch-screens. The proposed algorithm shows fast processing time by searching the limited range of parameters for computing hough transform with a small range of ROI image. Moreover, the proposed algorithm removes bad candidates among the detected lines by selecting the two closest candidate lines from the position of user's input. After that, it accurately detects an interesting vertex without additionally required interactions by detecting an intersection point of the two lines. As a result, we believe that the proposed algorithm shows a 1.4 pixel distance error on average as a vertex detection accuracy under such conditions as a 5.7 pixel distance error on average as an inaccurate input.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.5
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• pp.203-210
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• 2011

The current sensor network analyzes the data collected by the sensing of fixed sensor nodes and provides a service. However, this method cannot actively handle the state and the change in the position of people, 'the target for sensing and the change in the environment', including home automation, building automation and real-time road & weather information, and healthcare environment, etc. To support a dynamic situation which is appropriate for an individual in this diverse environment, it is necessary to provide actively differentiated specific information according to the movement of people and the changes in the environment. In this study, a individualized sensor mobile agent middleware which provides the individualized information (the location of fire incidence and the trace for the path of spread), has been realized through the sensor network environment constructed by the installation of wireless sensor nodes mounted with mobile agent middlewares in buildings.

• Journal of the HCI Society of Korea
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• v.3 no.1
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• pp.49-56
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• 2008

Most recent mobile devices can store a massive amount of images. However, the typical user interface of mobile devices, such as a small-size 2D display and discrete-input buttons, make the browsing and manipulation of images cumbersome and time-consuming. As an alternative, we adopt motion-based interaction along with a 3D layout of images, expecting such an intuitive and natural interaction may facilitate the tasks. We designed and implemented a motion-based interaction scheme for image browsing using an ultra mobile PC, and evaluated and compared its usability to that of the traditional button-based interaction. The effects of data layouts (tiled and fisheye cylindrical layouts) were also investigated to see whether they can enhance the effectiveness of the motion based interaction.