• Title/Summary/Keyword: 유비쿼터스 IT

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Design of the Context Autogenesis Model and Service for Context-Aware in Ubiquitous Environments (유비쿼터스 환경에서의 컨텍스트-인식을 위한 자생적 컨텍스트 모델과 서비스의 설계)

  • Oh Dong yeol;Oh Hae seok
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.4B
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    • pp.226-234
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    • 2005
  • Context-Aware is the most important facts to reason a personalized and optimized service and to provide it to user. In the previous researches, user and surrounding environment were main facts of Context-Aware and middleware or center server has been proposed to support Context-Aware. In the daily space(for example, home, office, Car, etc), interactions between user and service can be a important facts of Context-Aware. In this paper, Context Autogenesis service model is introduced, simplified the Context-Aware process and designed the middleware which performs decentralize management for Context-Aware information of user's portable devices, so that problems occurred during the management and operation of existing Context-Aware system can be minimized and supporting user anonymity

A Study on Weather Information System Based on Ubiquitous (유비쿼터스 기반의 기상정보 시스템에 관한 연구)

  • Park, Bo-Hyun;Lee, Kwong-Hoon;Jung, Suk-Ju;Choi, Bong-Keun;Seo, Dong-Sun;Hong, Sang-Jeen
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.2
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    • pp.935-938
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    • 2005
  • In this paper, we present the importance of an information communication and weather information system. And after we look into technology on a weather information system setup which does the ubiquitous to the foundation, we deduce an all sorts key point technology for the implementation of a weather information system and the time come true based on it, and we find the practical use plan of a weather information system.

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Implementation of Mobile Computing based RFID Reconition System (모바일 컴퓨팅 환경의 RFID 인식 시스템 구현)

  • Jung, Sung-Hun;Lee, Bong-Keun;Yim, Jae-Hong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.2
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    • pp.119-122
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    • 2005
  • RFID(Radio Frequency IDentification) is appearing by point technology by Ubiquitous environment of new paradigm and Logistics' application. But, RFID chip of this is high price and short bandwidth, low power and interference etc. can become technological problem. This is getting into obstacle in common use. Reader and tag, Embedded software etc.. that is accomplishing standardization is imported paying most expensive Royalty. This paper is RFID cognition system that use PDA in Ubiquitous environment to apply to Logistics system. RFID cognition system processes input/output of fundamental information attaching tag to Logistics of products. And RFID cognition system supports quick and correct and safe synthetic Logistics managerial system through construction of database. This can prove minimization and customer service of Logistics expense. RFID cognition system is advantage that can widen range of application to area that cognition system of existent fixing style can not do. Also, It can expect economical effect through inexpensive system construction.

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Meta Data Model based on C-A-V Structure for Context Information in Ubiquitous Environment (유비쿼터스 환경에서 컨텍스트 정보를 위한 C-A-V구조 기반의 메타 데이터 모델)

  • Choi, Ok-Joo;Yoon, Yong-Ik
    • The KIPS Transactions:PartD
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    • v.15D no.1
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    • pp.41-46
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    • 2008
  • In ubiquitous computer environment, by improving the computer's access to context information for dynamic service adaptation, we can increase richness of communication in human computer interaction and make it possible to produce more useful computational services. We need new data structure in order to flexible apply dynamic information to current context information repository and enhance the communication ability between human and computer. In this paper, we proposed to C-A-V (Category-Attribute-Value) context metadata structure required to support dynamic service adaptation for increasing communication ability in user-centric environments. We also classify the context metadata, as well as define its relationship with other context information on the basis of the application services, changes in the external environments.

Mobile Ubiquitous Healthcare System Using Wireless Sensor Network (무선센서네트워크 기반의 모바일 유비쿼터스 헬스케어시스템)

  • Shin, Kwang-Sig;Yau, Chiew-Lian;Chung, Wan-Young
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.11
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    • pp.2107-2112
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    • 2006
  • As growing up of elderly population, the interesting on healthcare system in normal life using W is increasing. An integrated u-healthcare service architecture with IEEE 802.11 and IEEE 802.15.4 based sensor network and code divisi(m multiple access(CDMA) public mobile telecommunication networks was designed and developed. Sensor nodes with electrocardiogram(ECG), body core temperature sensors are attached on the patients' body. The healthcare parameters are transferred to web server via CDMA mobile network or through existed LAN network. The existed LAN network is suggested to be used for continuous monitoring of patient's health status in hospital while mobile networks can be used for general purpose at home or outdoor where infra networks unavailable. This system enable healthcare personal to be able to continuously access, review, monitor and transmit the patients information whereever they are, whenever they want. And immediately check their status by using cellular phone and obtain detail information by communication with medical information server through CDMA. By using this developed integrated u-healthcare service architecture, we can monitor patients' health status for 24 hours.

Design and Implementation of Tiny TCP/IPv6 Protocol for Wireless Sensor Networks (센서 네트워크를 위한 초경량 TCP/IPv6 프로토콜의 설계 및 구현)

  • Kim, Shin-Jae;Kim, Young-Gyun;Lee, Wan-Jik;Heo, Seok-Yeol;Shin, Bum-Joo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.8
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    • pp.1955-1961
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    • 2009
  • As a core technology realizing ubiquitous world, recent researches are being concentrated to wireless sensor network. However, most research results were focused to the sensor network technology itself, even though interworking between the sensor network and Internet is also one of primitive requirements for ubiquitous world. In this paper, we design the tiny TCP/IPv6 profile which makes it possible to inter-connect the sensor network device to IPv6 based Internet. To confirm operation of the designed profile, we experimentally implemented and evaluated minimum TCP/IPv6 based on TinyOS. The evaluation result shows that throughput of our tiny TCP/IPv6 is almost same as that of TinyOS component.

Students' Perspectives towards M-learning Achievement, and Disposition towards Mathematics Using a mobile phone (Mobile-Learning에 의한 수학학습에서 학생들의 인식변화, 성취도, 및 성향에 대한 연구)

  • ChoiKoh, Sang-Sook
    • Communications of Mathematical Education
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    • v.23 no.3
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    • pp.863-885
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    • 2009
  • In the era of wireless internet, we are apt to use a mobile phone for learning mathematics, besides the pc computer and the notebook computer. This study was to investigate the effect of M-learning when students were given a wireless mobile phone in terms of their perspectives towards the use of a mobile phone, achievement and attitudes towards mathematics. They were the 3th grader in a high school, who were expected to take Aptitude Test for the entrance of the university level. The most students who took an ubiquitous environment of M-learning showed it as a benefit for learning mathematics and did not spend time at other activities such as listening to music, sending text-message, playing games, etc, but at the M-learning activities. The students who engaged in the M-learning activities were improved a significantly higher score at Aptitude Test than the students who took the make-up courses in the school and also did a significantly higher disposition towards mathematics which was caused by curiosity among 7 components of the mathematical disposition.

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Developing a Mobile-Business Framework Considering Ubiquitous Computing Environment (유비쿼터스 컴퓨팅 환경을 고려한 모바일 비즈니스 프레임워크 개발)

  • Park, Chul-Woo;Yang, Hee-Dong;Ahn, Joong-Ho
    • Information Systems Review
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    • v.5 no.2
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    • pp.37-51
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    • 2003
  • Mobile business noticed as a constructive alternative of e-commerce and e-business is being diversely considered as a new form or subset of e-business. In this study, mobile business is defined as a comprehensive alternative including e-business. The framework of the superset of e-business has two axes: connectivity and mobility. In addition, various cases based on the combination of the components are provided and explained. It is the main characteristic of this study that the element of off-line "mobility" is added to "connectivity" generally used while explaining e-commerce and e-business. For place (or location) is a prerequisite for the feature of mobility, we grope for why and how Location-Based Service (LBS) will take an important role in the development of new e-business models and services. As the real and full-scale beginning of IMT-2000 service and the rapid progress and diffusion of mobile communications services including wireless LAN require an immense and innovative way of thinking about e-commerce and e-business, the framework suggested in this study is considered to go far toward satisfying the new needs in this area.

DCCP based Congestion Control Scheme to support Mobility of Devices on Ubiquitous Computing Environment (유비쿼터스 컴퓨팅 환경에서 단말의 이동성을 지원하기 위한 DCCP 기반의 혼잡 제어 정책)

  • Park Si-Yong;Kim Sung-Min;Lee Tae-Hoon;Chung Ki-Dong
    • Journal of KIISE:Information Networking
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    • v.33 no.1
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    • pp.59-75
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    • 2006
  • In this paper, we propose a congestion control scheme to control the congestion due to the mobility of ubiquitous devices on ubiquitous computing environment. Especially, this congestion control scheme provides a reverse congestion avoidance state which can classify between packet error by features of wireless network and packet dropping by congestion. Also, it provides a slow stop state which can minimize bandwidth waste due to congestion control. The proposed congestion control scheme controls more adaptive than existing congestion control schemes. The proposed congestion control scheme is designed based on DCCP(Datagram Congestion Control Protocol) being proposed by IETF(Internet Engineering Task Force) and implemented on the Linux kernel. In simulation results, the proposed congestion control scheme provides good bandwidth throughput in wireless network as well as in wired network.

Real-Time Face Recognition System using PDA (PDA를 이용한 실시간 얼굴인식 시스템 구현)

  • Kwon Man-Jun;Yang Dong-Hwa;Go Hyoun-Joo;Kim Jin-Whan;Chun Myung-Geun
    • Journal of the Korean Institute of Intelligent Systems
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    • v.15 no.5
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    • pp.649-654
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    • 2005
  • In this paper, we describe an implementation of real-time face recognition system under ubiquitous computing environments. First, face image is captured by PDA with CMOS camera and then this image with user n and name is transmitted via WLAN(Wireless LAN) to the server and finally PDA receives verification result from the server The proposed system consists of server and client parts. Server uses PCA and LDA algorithm which calculates eigenvector and eigenvalue matrices using the face images from the PDA at enrollment process. And then, it sends recognition result using Euclidean distance at verification process. Here, captured image is first compressed by the wave- let transform and sent as JPG format for real-time processing. Implemented system makes an improvement of the speed and performance by comparing Euclidean distance with previously calculated eigenvector and eignevalue matrices in the learning process.