• Journal of Institute of Control, Robotics and Systems
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• v.14 no.8
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• pp.779-784
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• 2008

This paper presents Kalman filter based system modeling algorithm for autonomous robot systems. State of the robot system is measured using embedded sensor systems and then carried to a host computer via ubiquitous sensor network (USN). We settle a linear state-space motion equation for unknown robot system dynamics and modify a popular Kalman filter algorithm in deriving suitable parameter estimation mechanism. To represent time-delay nature due to network media in system modeling, we construct an augmented state-space model which is mainly composed of original state and estimated parameter vectors. We conduct real-time experiment to test our proposed estimation algorithm where speed state of the constructed robot is used as system observation.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.895-898
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• 2005

최근 미래 컴퓨터 기술에 대한 연구로서, 인터페이스 부분에 초점을 맞춘 다양한 연구가 진행되고 있다. 현재 웨어러블 컴퓨터(Wearable Computer), 유비쿼터스 컴퓨팅(ubiquitous Computing), 가상현실(Virtual Reality), 멀티모달 인터페이스 기술 등 다양한 인터페이스 기술이 연구되고 있다. 본 논문에서는 모바일 폰 카메라를 이용해 손가락 움직임을 인식하는 알고리즘으로 KTF v1.1 Emulator 를 이용하여 모바일 게임을 위한 멀티모달 인터페이스로 적용 가능성을 제안한다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• v.4 no.2
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• pp.241-248
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• 2004

Recent paradigm in technology shifts from object-based technology to environment-based technology. Issue here is interaction among humans and the world around humans. The world we consider includes natural and artificial "space." Interactive technology, which explore holistic interactions based on "Mom (embodiment)," suggests a good starting point for exploring this issue. Soft engineering, "Mom," holistic interactions, tangible space, ubiquitous computing, science of emotion, and interactive media are key concepts in interactive technology. Interactive tangible media "iT_Media" is proposed to explore and synthesize these ideas. Interactive technology initiative (ITI) is an interdisciplinary research group to search for the proper technology and the proper way of implementing technology: "interactive technology" or "soft engineering." Some experimental activities conducted by ITI are presented in this paper.tal activities conducted by ITI are presented in this paper.

• Journal of Digital Contents Society
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• v.11 no.2
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• pp.123-127
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• 2010

Innovation in technology has changed the form and meaning of performance work and its appreciation in its long history. Applied to performance art, the concept of digital media and ubiquitous also created new implications in aesthetics and technology. As a matter of fact, new elements of ubiquitous performance- new relationship between creators and the audience and the extension of the notion of 'audience'- are not newly introduced. These elements have been tried throughout hundreds years of performance history and is far more developed thanks to digital communication. In this study, we will discuss how these elements have been developed from the earlier text-based ubiquitous performance to 3D virtual world and contributed to the construction of the virtual culture.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.15 no.2
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• pp.49-70
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• 2004

This study is to analyze the present publishing media in order to grasp the trend of data development and distribution. For this, I analyze the present tendency, concentrating indices of diagram, dividing into traditional book and e-book. It also discusses the viewpoint extracted from the problems related to the data development and distribution of publishing media. Traditional books and e-books have been expending to add newly updated convergence media in digital media era in which internet represents. I discuss these changes to convergence media for the realization of 'ubiquitous' mean the evolution to transmit propagational elements from proper character of traditional book. By the same token, I examine prospect of increasing digital publishing media and other problems before distribution.

• 한국IT서비스학회:학술대회논문집
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• 2009.05a
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• pp.588-592
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• 2009

The latest advances in great revolution for digital media and contents industries with Ubiquitous era. Because of spread and supply of various multimedia devices with combination digital with network, we need various type of digital contents. The Digital contents consists of Middleware industries, network business, contents service presenters and users. For supporting digital media. contents and media devices have been converging Digital contents convergence has been proceeding rapidly in media, broadcast and communication field. And also, whole Environment for these industries has been changing, too. Wee need another digital contents convergence for new type of products and services because of convergence of IT and broadcast. In addition, new business trends is very important about these new industrial change and developments with digital contents convergence.

• Archives of design research
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• v.19 no.5 s.67
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• pp.323-334
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• 2006

The continuous development of digital technology has actualized ubiquitous computing, and the environment of human life has come to face changes. Prediction of the future so that human life may be prepared can be very important. A number of predictions of ubiquitous space are presented, ranging from related professional research to mass media, However, proper analyses and understanding are required to understand ubiquitous space and apply it to design. This study seeks to understand ubiquitous space through analysis of the trend in digital technology from a new perspective, to research cases, and predict the future of ubiquitous space. Human, object, and environment have been set as basic factors as the subjects smoothly exchanges various types of information in the physical space, and the trend in digital technology is analyzed. From a human-oriented perspective, the background and development trend of digital technology has been analyzed under the theme of interaction and interlace. From an object-oriented perspective, an analysis was unfolded under the theme of products' evolvement from radios to robots. From an environment-focused perspective, an analysis has been carried out under the theme of situation recognition, intrinsic factors, and integration and connectivity. By applying the analytic results, the types of studies that predict the future of ubiquitous space and generate concepts have been classified and analyzed into three different types of studies for experiment, industry, and public. In this manner, ubiquitous space has been forecasted. This study seeks a systematic analysis of the understanding of the trends in digital technology and employs a case study of ubiquitous space based on systematic analysis. In consideration of all these, this study is expected to contribute to concept generation and development by designers.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.481-486
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• 2008

Recent advanced interlace technologies allow the user to interact with different spaces such as Virtual Reality (VR), Augmented Reality (AR) and Ubiquitous Computing (UC) spaces. Here, we present a LEGO House application, a collaborative application which involves multi interaction spaces -VR, AR and UC spaces. The LEGO House application is built based on the VARU framework which is designed for enabling the prototyping of a tangible space application. The application is about an interior design. One user is located in the combined AR and UC space and interacts with the AR LEGO house and the physical smart devices. The other users interact with the virtual LEGO house but they share the same environment, the LEGO house. Therefore, they can collaborate together as they are co-located.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.1
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• pp.19-24
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• 2010

This paper proposes a unified time-domain channel estimator (UTD-CE) for ubiquitous wireless broadband access based on orthogonal frequency division multiplexing (OFDM) systems. As a part of a software radio platform for ubiquitous services, the proposed UTD-CE can be exploited with the simply changeable parameters, pilot symbols and pilot subcarriers allocation, which are usually different according to the system specifications such as IEEE802.11x WiFI, IEEE802.16x WiMAX, DMB, Media FLO, DVB-H, etc. Given the pilot information, the channel frequency responses (CFRs) of data subcarriers will be analogously estimated by Wiener filtering and discrete Fourier transform (DFT)-based interpolation in the UTD-CE. Simulation results indicate that the proposed method significantly outperforms the conventional time-domain channel estimator when the pilot information is changed.

• Journal of Intelligence and Information Systems
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• v.15 no.2
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• pp.75-95
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• 2009

The aim of this research is to design and analyze a social network service model using mobile RFID based business card. This paper suggests how the behavior of exchanging business cards will be changed in ubiquitous environment and designs a social networking service model using a ubiquitous business card, which embeds a RFID tag. We describe the scenarios and analyze a role, value and potential benefits of participants of the u-SNS service model. For the proof of the superiority and the feasibility of our model, we compare it with its related researches and products based on the calculation of the benefits and costs of the alternatives.