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RISS 인기검색어
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- 저자 : Ryo Kodama (검색결과 3 건)
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Practice and Evaluation of a Web Bulletin Board Monitoring in Distance Teaching Assistant Program
Ryo Takaoka,Ayumi Kodama,Shinichi Iwasa,Masayuki Shimokawa,Issei Yoshida,Toshio Okamoto 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
The aim of this research tries to design a learning support model that includes a teacher who gives a lesson in a school and distance teaching assistants (Distance TAs) who asynchronously support group learners, who are engaged in problem-solving activities in a learning support environment and develop Distance TA’s learning support methods and some tools used in this model. In addition, we aim at designing a Distnce TA’s program in which he/she acquires the ability of distance learning support. In this paper, we describe a framework of the distance learning support model and then explain a function to monitor and activate Web bulletin board among Distance TAs and learner. Furthermore, we describe an educational practice and an evaluation result that used this function.
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Study on Online 3D Environment Construction for Teleoperation
Masamitsu Kurisu,Ryo Kodama 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
On remote operation of a robot, it is important to provide the situation around the robot for the operator intelligibly and quickly. This paper presents an online 3D environment map construction by using a robot operated remotely. The environment data is acquired with only a stereo camera mounted on the robot. The 3D environment map is constructed incrementally from the data by online processing. Specifically, the map is provided by polygon-meshes with color, which are generated from environment point clouds. As for online construction of the map, the system has to execute divided process modules in parallel, in order to decentralize processing loads. This paper explains the system architecture to execute the process modules in parallel, and the details of the hardware in which the constructed system is implemented. Implementation of the system to a small mobile robot is also described. Feasibility of our system will be discussed on experimental results of 3D map construction in an imitated environment.
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( Yoko Nunome ),( Hyun Kook Park ),( Kenji Kodama ),( Yasuaki Ueki ),( Ryo Yoshiie ),( Sang Chun Lee ),( Kuniyuki Kitagawa ),( Ichiro Naruse ) 경남대학교 신소재연구소 2013 신소재연구 Vol.25 No.-
Toxic volatile organic compounds (VOCs) have serious implications for the environment and human health. An analytical method for the rapid, direct detection of VOCs without any sample pretreatment was successfully developed by combining soft plasma ionization (SPI) with time-of-flight mass spectrometry (TOFMS). The SPI source, based on Ref. 1 and re-designed for this work, is shown schematically in Fig. 1. Vapor from a liquid sample was diluted to a ratio selected in accordance with the amount of ambient air. To achieve softer ionization of VOCs by the SPI method, discharge parameters (current and pressure) were varied to determine the optimal experimental conditions. Use of ambient air as the discharge gas was the aim for practical in situ analysis. Optimal conditions for the SPI source were determined to be: sample dilution ratio, R = 0.30; discharge current, 50 mA; and ambient air pressure, 1000 Pa. All mass spectra of the the organic solvents exhibited molecular ion base peaks, which demonstrated the achievement of soft ionization by the SPI method. From these results, an ionization mechanism in the SPI-TOFMS system was suggested in which excitation of N2 would facilitate the ionization of sample molecules. It is noteworthy that the SPI-TOFMS system enabled highly soft ionization by using practical ambient air as the discharge gas rather than cylinder gas. Therefore, this SPI-TOFMS system was validated and was well suited for the in situ on-line monitoring of VOCs. Further work will be necessary to evaluate quantification methods for the accuracy and reproducibility of our measurements.
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