• 한국정보교육학회:학술대회논문집
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• 2005.08a
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• pp.29-37
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• 2005

유비쿼터스 러닝을 가능하게 하기 위해서는 학습자의 지속적인 학습 결과 관리와 다양한 기기에 적합한 콘텐츠 표현 방안 그리고 이 기종 시스템들 간의 동기화 문제 등이 해결되어야 한다. 본 논문에서는 PDA를 사용하는 학습자들에게 학습 콘텐츠를 제공하고, PDA 상에서 학습을 할 수 있게 한 후, 학습자의 학습 결과를 서버로 동기화 할 수 있는 PDA 학습 시스템을 설계하고 구현하고자 한다. PDA 학습 시스템은 학습을 위한 PDA 어플리케이션과 학습 결과 처리를 위한 PDA 서버로 구성된다. PDA 서버는 XML형태의 문제 파일을 생성하고, PDA 어플리케이션에 이를 제공하며, PDA내의 학습 결과를 서버의 학습 결과와 동기화 시켜주는 기능을 한다. 제안하는 시스템을 교육 현장에 적용하고, 그 문제점을 분석하여 개선해 나간다면 유비쿼터스 러닝을 실천하기 위한 기반연구로서 활용될 수 있을 것이다.

• Survey Research
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• v.6 no.1
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• pp.63-81
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• 2005

A survey method in Korea has being developed rapidly since a survey company was established in 1968. In latest, the CATI, internet survey, Notebook, PDA survey methods are being utilized in accordance with communication development. This article focuses on the practical use and the strength and weakness of the PDA survey solution which employs 'KISS' system designed by KRIVET itself. The survey using PDA has, on the one hand, such strengths as follows : 1) efficient field control, 2) reduction of time for verifying data and generation of proper data 3) shortening survey duration from intial survey to data completion, 4) cutting down survey personnel and cost. On the other hand, survey using PDA has the following weakness: 1) limitation of questionnaire expression, 2) increasing time for survey, 3) communication barrier in some regions.

• Journal of Sensor Science and Technology
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• v.13 no.6
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• pp.454-461
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• 2004

We have designed a portable electronic nose (e-nose) system using an array of commercial gas sensors and personal digital assistants (PDA) for the recognition and analysis of volatile organic compounds (VOC) in the field. Field screening of pollutants has been a target of instrumental development during the past years. A portable e-nose system was advantageous to localize the special extent of a pollution or to find pollutants source. The employment of PDA improved the user-interface and data transfer by Internet from on-site to remote computer. We adapted the Lavenberg-Marquardt algorithm based on the back-propagation and proposed the method that could predict the concentration levels of VOC gases after classification by separating neural network into two parts.

• Annual Conference of KIPS
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• 2007.05a
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• pp.577-580
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• 2007

본 논문은 PDA를 이용한 불법주정차 단속시스템의 설계 및 구현에 대하여 논의한다. 향후, 유비쿼터스 환경에서의 무선 인터넷 서비스는 PDA 단말기를 이용하여 언제, 어디서나 업무처리가 가능하게 되고, 사용자들은 어느 장소에서나 최신의 정보 서비스를 제공받을 수 있는 편리한 시대를 실현시켜 줄 것이다. 특히, 이러한 서비스를 위한 미디어 타입도 텍스트뿐 아니라 카메라 이미지, 동영상과 같은 디지털 자료를 이용함으로써 업무 서비스의 획기적인 개선이 예상되고 있다. 본 논문은 현행의 주정차 단속에 대해서 분석하고 그 문제점을 토대로 이동 중의 교통행정 시스템을 설계하여 보았다. 현행 주정차 단속의 문제점의 보안을 위해 주정차 단속 정보를 DB로 구축하고 관리하는 시스템을 설계하는 것을 주된 연구의 내용으로 한다. 특히, 이동 중의 단속자를 위한 PDA 기반의 클라이언트 소프트웨어를 설계함과 아울러, 서버 측에서는 자바 플랫폼을 기반으로 한 소프트웨어를 이용하여 상호 이질적인 환경에서의 소프트웨어 설계를 시도하였다.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11a
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• pp.478-481
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• 2003

컴퓨터만을 이용하던 데이터 통신의 개념이 이제는 흠 네트워킹 개념으로 확대되었고 통신 방법도 전력선, 광케이블, 무선 등을 이용하는 방식으로 발전되고 있으며, 핸드폰을 이용한 통신에서 노트북이나 PDA를 이용한 무선 네트워크로 바뀌고 있는 실정이다. 이러한 변화는 일반사회에서는 Ad-hoc 네트워킹에 대한 연구를 발전시키고 있으며, 군사적으로는 C4I, Spider 체계등 군사적 목적의 무선 네트워킹 개념이 연구되고 있다. 본 논문에서는 이런 무선 네트워킹을 AX.25 Protocol을 기반으로 한 TNC와 PDA를 이용 모바일 무전기 데이터 통신 시스템을 구현하고, 이에 대한 성능평가를 통해 Ad-hoc 통신망에서 TNC를 이용한 PDA 무전기를 제안한다.

• Journal of The Korean Association of Information Education
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• v.9 no.3
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• pp.511-522
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• 2005

The rapid development of information & communication technology has changed the paradigm of education. Recently the area of education is introducing u-Learning, in which learning is possible at any time and in any place through personal information devices such as PDA, tablet PC and mobile phone terminals. Taking advantage of the mobility and individuality of personal information devices, u-Learning can provide learning customized to the characteristics of individual learners without the limitations of time and space and can be effective in situational learning and experiential learning. In order to identify the uses of PDA in teaching.learning and to develop a basic teachinglearning model using PDA, the present study applied PDA directly to classes and examined the effects. According to the result, most students were satisfied with classes utilizing PDA but problems were also found in connection, insufficient contents for PDA, the quality of screen, etc.

• Journal of the Korean Institute of Intelligent Systems
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• v.12 no.4
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• pp.379-384
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• 2002

This paper represents the mobile robot system remote controlled by PDA(personal digital assistance). So far, owing to the development of internet technologies, lots of remote control methods through internet have been proposed. To control a mobile robot through internet and guide it under unknown environment, We propose a control method activated by PDA. In a proposed system, PDA acts as a user interface to communicate with notebook as a controller of the mobile robot system using TCP/IP protocol, and the notebook controls the mobile robot system. The information about the direction and velocity of the mobile robot feedbacks to the PDA and the PDA send new control method produced from the fuzzy inference engine.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2002.05a
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• pp.105-108
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• 2002

This paper represents the mobile robot control system remote controlled by PDA(personal digital assistance). So far, owing to the development of internet technologies, lots of remote control methods through internet have been proposed. To control a mobile robot through internet and guide it under unknown environment, We propose a control method activated by PDA. In a proposed system, PDA acts as a user interface to communicate with notebook as a controller of the mobile robot system using TCP/IP protocol, and the notebook controls the mobile robot system. The information about the direction and velocity of the mobile robot feedbacks to the PDA and the PDA send new control method produced from the fuzzy inference engine.

• The Journal of the Korea Contents Association
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• v.9 no.4
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• pp.247-253
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• 2009

PACS(Picture archiving communication system) is a system that enables medical images such as X -ray, CT, MRI, PET to be stored electronically viewed on computer screens so that doctors and other authorized people can access search the information as needed. But if they are not in hospital area for example on holiday or at night, that are not able to access the PACS system instantly. We have to solve this problem for more efficient patient care. So we try to suggest a method that use the PDA system that wireless LAN and CDMA cellular phone are equipped. This system may help to access easier to PACS system regardless of the location and can also attribute the development of telemedicne.

• The Journal of Korean Association of Computer Education
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• v.12 no.3
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• pp.53-62
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• 2009

As Information communication technology develops, requirements for new educational media and new contents gets bigger and bigger. Especially PDA is required for educational media on m-learning environment. We design and implement intra-educational contents sequencing model and educational contents sequencing model between educational contents for PDA as educational supplementary media for m-learning environment, and LMS supporting PDA. And we balanced the work load of PDA and LMS and constructed practical service platform for using PDA as educational supplementary device.