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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Norihiro Sugita Yoshihisa Kojima Makoto Yoshizawa Akira Tanaka Makoto Abe Noriyasu Homma Kazunori Seki Nobuyasu Handa Department of Management Science and Technology Graduate School of Engineering Tohoku University Sendai 980-8578 Japan Department of Electrical and Communication Engineering Graduate School of Engineering Tohoku niversity Sendai 980-8579 Japan Information Synergy Center Tohoku University Sendai 980-8579 Japan Department of Human Support System Faculty of Symbiotic Systems Science Fukushima University Fukushima 960-1296 Japan Sendai School of Health and Welfare Sendai 981-3206 Japan

ISBN: (纸本)9781457717871

A cycling wheel chair (CWC) is a useful tool to provide physical exercise for patients who face difficulty walking, caused by stroke or other brain disorders. A system has been developed for rehabilitation, which allows patients to practice driving a CWC in a virtual environment. In this study, hardware improvements were developed and methods for evaluating driving skills were investigated to improve the practical application of this system. The hardware was changed to enable users to drive the CWC they were using in their daily lives. In addition, four types of test scenarios that focused on basic and important actions necessary to drive a CWC, such as pedaling and steering, were developed. An experiment with healthy young and elderly persons was conducted to evaluate the validity of the system. Results showed that pedaling and steering skills were improved in both the young and elderly subjects but the improvement patterns differed between them. These results indicate that repeated practice with the proposed system enhances the safety of driving a CWC, particularly for elderly users.

关键词： Virtual Reality system Evaluate Skills Needed Cycling Wheel-Chair

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Numerical analyses of circuit constants and eddy current distribution in the brain in transcranial magnetic stimulation using eccentric figure-eight coils

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2012年第1期50卷 180-188页

作者： Kato, Takuya Sekino, Masaki Matsuzaki, Taiga Nishikawa, Atsushi Saitoh, Youichi Ohsaki, Hiroyuki Department of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo Japan Department of Neuromodulation and Neurosurgery Office for University-Industry Collaboration Osaka University Japan Home Healthcare Research and Development Department Teijin Pharma Limited Japan Bioengineering Course Division of Applied Biology Faculty of Textile Science and Technology Shinshu University Japan Department of Advanced Energy Graduate School of Frontier Sciences The University of Tokyo Japan

We previously proposed an eccentric figure-eight coil design which induces sufficient currents in the brain at lower output powers of stimulator. In the present study, numerical analyses were performed with various coil design parameters, such as outer and inner diameters and number of turns, to investigate the influence of these parameters on the eddy current distribution in the brain and the coil characteristics. Increases in the inner diameter, the outer diameter, and the number of turns caused increases in the induced currents. In order to downsize the stimulator system, we need to strengthen the eddy current in the brain, maintaining inductance as small as possible. Our results show that it is effective to enlarge outer diameter. In addition, there is only small difference in the eddy current distributions between the eccentric coil and the concentric coil in direction along with the coil plane and with depth of the brain.

关键词： Numerical analysis

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FOREST FIRE HAZARD MODELING USING HYBRID AHP AND FUZZY AHP METHODS USING MODIS SENSOR

FOREST FIRE HAZARD MODELING USING HYBRID AHP AND FUZZY AHP M...

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IEEE International Geoscience and Remote Sensing Symposium

作者： Shahram Sharifi Hashjin Amin Hoseinpoor Milaghardan Ali Esmaeily Barat Mojaradi Farzin Naseri Dept. of Remote Sensing Eng. Kerman Graduate University of Technology Dept. of Geospatial information system Eng. Kerman Graduate University of Technology Dept. of Geomatics Engineering School of Civil Eng. Iran University of Science and Technology Dept. Of Ecology International Center for Science High Technology & Environmental Sciences

ISBN: (纸本)9781467311601

Forest fire is one of the major natural risks in the north of Iran. It is impossible to control nature, but is possible to map forest fire risk zone and thereby minimize the risk of fire. The aim of this study is modeling the potential of forest fire in the Golestan forests by using Remote Sensing, GIS and aerologic data. The variables in this study must be weighted according to their impact on the forest fire hazard. Therefore analytical hierarchy process (AHP), and fuzzy-AHP, used to rank and prioritize the causative factors of fire risk in the study area. Fires occurred at 2010 in this zone and using the MODIS fire product dataset shown that majority of burned area were in the recommended risky places of this model by overall accuracy about 64%. Finally the sensitivity analysis applied to model wherein shown the fuel has highest degree of sensitivity.

关键词： AHP Fuzzy-AHP Forest fire GIS RS Crown fires fire hazard Analytic hierarchy process fire risks Moderate Resolution Imaging Spectroradiometer Modeling Sensors HYBRID combustion zone

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Viscosity Measurement Using Breakup of Levitated Droplet by Rotation

Viscosity Measurement Using Breakup of Levitated Droplet by ...

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第七届天地应用两相系统国际研讨会

作者： Rui Tanaka Satoshi Matsumoto Akiko Kaneko Yutaka Abe University of Tsukuba Graduate school of System and Information Engineering1-1-1TennoudaiTsukubaIbaraki 305-8573Japan Japan Aerospace Exploration AgencyInstitute of Space and Astronautical Science2-1-1SengenTsukubaIbaraki305-8505Japan

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Viscosity Measurement using Breakup of Electrostatic Levitated Drop by Rotation

Viscosity Measurement using Breakup of Electrostatic Levitat...

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Asina Microgravity Pre-Symposium——9th China-Japan-Korea Workshop on Microgravity sciences(第九届中日韩微重力科学学术会议暨亚洲微重力科学大会)

作者： Rui Tanaka Satoshi Matsumoto Akiko Kaneko Yutaka Abe University of Tsukuba Graduate school of System and Information Engineering.1-1-1TennoudaiTsukubaIbaraki 305-8573Japan Japan Aerospace Exploration AgencyInstitute of Space and Astronautical Science.2-1-1TennoudaiTsukubaIbaraki 305-8573Japan

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Viscosity Measurement using Breakup of Electrostatic Levitated Drop by Rotation

Viscosity Measurement using Breakup of Electrostatic Levitat...

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Asian Microgravity Pre-Symposium 9th China-Japan-Korea Workshop on Microgravity sciences

作者： Rui Tanaka Satoshi Matsumoto Akiko Kaneko Yutaka Abe University of Tsukuba Graduate school of System and Information Engineering.1-1-1TennoudaiTsukubaIbaraki 305-8573Japan Japan Aerospace Exploration Agency Institute of Space and Astronautical Science.2-1-1SengenTsukubaIbaraki 305-8505Japan

Thermophysical property measurement of material without container is promising technique with high accuracy for high temperature molten *** environment is useful to achieve containerless condition,and levitation technique also realizes the containerless processing even on the *** purpose of this study is to establish measurement technique of viscosity with moderate viscous range,which has no conventional measurement *** this study,a drop is levitated by electrostatic force,induced to *** dynamic behavior of levitated drop shape is observed. Figure 1 shows deformation of levitated drop by *** simulation is result by

关键词： Viscosity Measurement using Breakup of Electrostatic Levitated Drop by Rotation

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Joint source channel VL coding/decoding for deep space communication networks based on a space trellis

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science China(information sciences) 2011年第9期54卷 1883-1894页

作者： WU WeiRen 1,TU Juan 2,TU GuoFang 1,GAO ShaoShuai 1 & ZHANG Can 1,3 1 school of information science and engineering,graduate University of Chinese Academy of sciences,Beijing 100049,China 2 Beijing Institute of Electronic system engineering,China Aerospace science & Industry Corp.,Beijing 100854,China 3 State Key Laboratory of information Security,graduate University of Chinese Academy of science,Beijing 100049,China School of Information Science and Engineering Graduate University of Chinese Academy of Sciences Beijing China Beijing Institute of Electronic System Engineering China Aerospace Science & Industry Corp. Beijing China State Key Laboratory of Information Security Graduate University of Chinese Academy of Science Beijing China

This paper presents joint source channel variable length (VL) coding/decoding based on a space *** constructing a joint decoding plane trellis,better decoding performance can be achieved than by using the bit-level decoding ***,the plane trellis is complicated,which results in high decoding complexity for decoding VL turbo *** solve this problem,we construct a space trellis and design a low-complexity joint decoding algorithm with a variable length symbol-a posteriori probability (VLS-APP) algorithm in resource constrained deep space communication *** results show that the proposed approach reduces the decoding complexity by 10% compared with the plane trellis,and the gain of Eb/N0 is about 0.2 dB at SER=***,it provides substantial error protection for variable-length encoded image data.

关键词： joint coding/decoding VL turbo codes space trellis VLS-APP

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A haptic instruction based assisted driving system for training the reverse parking

A haptic instruction based assisted driving system for train...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Masakazu Hirokawa Naohisa Uesugi Satoru Furugori Tomoko Kitagawa Kenji Suzuki Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Technical Research Center Advanced Vehicle System Research Field Mazda Motor Corporation Yokohama Kanagawa Japan Technical Research Center Innovative Research Planning Field Mazda Motor Corporation Yokohama Kanagawa Japan Japan Science and Technology Agency Tsukuba Ibaraki Japan Faculty of Engineering Information and Systems University of Tsukuba Japan

The accident probability of beginner drivers is significantly higher than that of experienced drivers. It can be assumed that this is due to lack of driving skills which lead to making wrong decisions according to cognition and operating in correct way. In this paper, we propose a novel assisted driving system intended to help drivers to improve their skills for the reverse parking. The system is able to assist the driver by haptic instruction on the steering wheel in order to induce the driver to make the adequate operation. For the validation, we developed a 1/10 scale car simulator as a simulation environment on which we installed the proposed assistance method and conducted reverse parking experiment by using the simulator. According to the experiment, we validated that the parking accuracy and the trajectory similarity of subjects assisted by proposed system significantly increased compare to subjects unassisted. Consequently, the proposed assisted driving system could accelerate the learning of humans' driving skills.

关键词： Vehicles Haptic interfaces Wheels Trajectory Visualization Training Accidents

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Evaluation of substrate noise coupling in RFICs (invited)

Evaluation of substrate noise coupling in RFICs (invited)

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4th IEEE International Symposium on Radio-Frequency Integration Technology, RFIT2011

作者： Nagata, Makoto Lin, Xihua Azuma, Naoya Yamaguchi, Masahiro Department of Information Science Graduate School of System Informatics Kobe University Japan Department of Electrical and Commmunication Engineering Graduate School of Engineering Tohoku University Japan

ISBN: (纸本)9781457705182

Substrate noise coupling and impacts on RF integrated circuits (RFICs) have been intensively studied for intending a single chip solution of wireless communication systems. On-chip measurements characterize noises from digital parts of mixed-signal ICs in terms of noise generation as well as noise propagation through a silicon substrate, demonstrated by silicon results with sub-100 nm CMOS test vehicles. Simulation and emulation help further understanding of the interference of such noises with RFIC operation as well as their impacts on RF communication. © 2011 IEEE.

关键词： CMOS integrated circuits

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Effects of changes in the apparent viscosity of blood with vessel size on retinal microcirculation: Significance of the Fåhraeus-Lindqvist effect

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2011年第4期49卷 533-543页

作者： Takahashi, Tatsuhisa Saitoh, Tadashi Jiang, Yinlai Wang, Shuoyu Okada, Akiyoshi Yanagida, Hirotaka Department of Mathematical Information Science Asahikawa Medical University Japan Department of Bio-System Engineering Graduate School of Science and Engineering Yamagata University Japan Department of Intelligent Mechanical Systems Engineering Kochi University of Technology Japan Center for Campus Health Environment Aichi University of Education Japan Department of Informatics Graduate School of Science and Engineering Yamagata University Japan

The purpose of this study was to quantitatively assess the influence of the Fåhraeus-Lindqvist effect on the microcirculation in the arteriovenous network of the human retina. A mathematical model was used to simulate the arteriovenous distributions of hemodynamic parameters within a microvascular network of successive, symmetric bifurcating branches that were constructed based on both flow conservation and a modified Murray's lawwith a diameter exponent of 2.85. The vessel calibers ranged from a 108-μm arteriole and a 147-μm venule down to the 5-μm capillaries. The distributions of vascular resistance, pressure drop, and wall shear stress as a function of vessel diameter within the retinal microcirculatory network with the Fåhraeus- Lindqvist effect were lower than those without the Fåhraeus-Lindqvist effect. The efficiency of blood transport to tissues in the microvascular bed, which was evaluated in terms of the inverse of the mechanical energy cost of the product of the driving pressure and blood flow, was 44 greater with the Fåhraeus-Lindqvist effect than without the Fåhraeus-Lindqvist effect. These results quantitatively demonstrated that the Fåhraeus-Lindqvist effect plays an important role in reducing the physical energy required to transport blood that flows through the microcirculatory network. The integrated and interactive relationships between shear stress, circumferential wall stress, vessel radius, and wall thickness in response to acute and chronic increases in perfusion pressure are discussed with regard to their coordinating roles in the control of blood flow and pressure in microcirculation.

关键词： Microcirculation

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