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Comparison of temperature preference for habitat among three species of oceanic sea skaters,Halobates micans,*** and ***

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Natural Science 2013年第12期5卷 9-15页

作者： Mitsuru Nakajo Takero Sekimoto Kentaro Emi Ryuta Ide Kai Wada Takao Inoue Masatoshi Moku Vladimír Kostál Chihiro Katagiri Tetsuo Harada Laboratory of Environmental Physiology Graduate School of Integrated Arts and SciencesKochi UniversityKochiJapan Atmosphere and Ocean Research Institute The University of TokyoTokyoJapan Institute of Entomology Biology Center of the Academy of Sciences CRCeske BudejoviceCzech Republic Division of Life Science and Engineering School of Science and EngineeringTokyo Denki UniversityTokyoJapan

The main purpose of this study is to investigate temperature preference for habitat of three species of oceanic sea skaters, Halobates micans, H. germanus and H. sericeus. For each of the three species, we examined the relationship between population density and surface water and air temperatures in the sampling sites during three science cruises in the tropical to temperate zone of the Pacific Ocean. A higher density of H. micans was observed in sites with higher water and air temperatures at 28℃?- 30℃?than that at site with lower temperatures of 23℃?- 28℃. A higher density of H. germanus was observed in sites with extremely high temperatures of 29.6℃?and 30℃?than that in sites with moderately high temperatures of 28℃?- 29℃?in the Pacific Ocean, while a relatively high density was observed in sites with a wide range of temperatures from 24℃?- 30℃?in the southern hemisphere Pacific Ocean. The relatively low temperature preference of 23℃?- 28℃?exhibited by H. sericeus may be related to its size as the smallest among the three species and its relatively wide latitudinal distribution ranging up to 40?N.

关键词： Oceanic Sea Skaters Temperature Preference Latitudinal Distribution Pacific Ocean

Development of a Coil-Shape Photocatalysis-Plasma Synergistic Reactor for a Practical and Long-Term Usable Air-Cleaner

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American Journal of Analytical Chemistry 2014年第8期5卷 467-472页

作者： Tsuyoshi Ochiai Yuji Hayashi Erina Ichihashi Tadashi Machida Yoshitsugu Uchida Shoko Tago Yuko Morito Akira Fujishima I’m PACT World Co. Ltd. Tokyo Japan Kanagawa Academy of Science and Technology Kawasaki Japan Photocatalysis International Research Center Tokyo University of Science Chiba Japan TANASHIN denki Co. Ltd. Tokyo Japan

A novel air-cleaner with a coil-shape photocatalysis-plasma synergistic reactor was developed. The air-cleaner showed 95% ± 1% reduction of a TVOCs concentration in tobacco smoke at “single-pass” condition. Air-purification activity of the air-cleaner was stably-maintained after the treatment of 12,000 cigarettes of tobacco smoke.

关键词： Photocatalysis Plasma Treatment Synergy Volatile Organic Compounds Air-Cleaner

Chaotic Dynamics of a Simple Excitable Neuron Model

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Chaotic Dynamics of a Simple Excitable Neuron Model

IJCNN International Joint Conference on Neural Networks

作者： N.Ichinose K.Aihara K.Judd Department of Electronic Engineering Factdty of EngineeringTokyo Denki University2-2 Nishiki-chokandaChiyoda-kuTokyo 101Japan Department of Mathematics University of Western Australia.

＜正＞We study a neuron model with asynchronous excitable dynamics in this paper. This model is called the Z-model and described by a simple difference equation. We numerically analyze its response characteristics to ...

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Trajectory control of pneumatic servo table with air bearing

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Trajectory control of pneumatic servo table with air bearing

2011 International Conference on Fluid Power and Mechatronics

作者： Kenji Kawashima Toshiharu Kagawa Toshinori Fujita Mechano-Micro Engineering Department tokyo Institute of Technology Nagatsuta-cho Midori-kuYokohamaKanagawaJapan tokyo denki university Kanda-nishiki-cho Chiyoda-kuTokyo 101-8457Japan

In this paper,the trajectory control design of the pneumatic servo table considering the dynamics of pipelines and servo valve is *** table is mainly composed by a pneumatic actuator,the high-performance pneumatic servo valve and *** pneumatic actuator utilizes a pneumatic cylinder with air *** servo valve,with high dynamics up to 300Hz,is connected with the pneumatic actuator by *** whole system is pneumatically driven,it has advantages like low heat generation and non-magnetic,which are suitable for precise positioning.A linear model considering the dynamics of pipelines and the servo valve is designed to simulate the *** with experimental results,it is found that with 7th order linear control model,the discrepancy between experimental and simulation results became much smaller than the 3rd order model was ***,a low dimensional model is necessary for practical *** there are two poles which are much further from imaginary axis compared with other five poles in the pole loci of the 7th order model,the model’s order can be reduced into *** comparing simulation with experimental results,we found that the 5th order model can also match with the real system *** on this result,a 5th order feed forward has been *** a curve which can derivate by five times is inputted,the experimental results show that the maximum trajectory has been minimized by 20μm.

关键词： Pneumatics Trajectory control Linear model Pneumatic servo table

Factors Influence on the Broaching Hammering Sound during Cementless Total Hip Arthroplasty

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Journal of Biomedical Science and Engineering 2022年第9期15卷 229-240页

作者： Xu Zhuang Yasuhiro Homma Taichi Sato Tomonori Baba Itaru Morohashi Hideaki Iwase Kazuo Kaneko Muneaki Ishijima Department of Orthopaedic Surgery Juntendo University School of Medicine Tokyo Japan Department of Advanced Machinery Engineering Tokyo Denki University School of Engineering Tokyo Japan Department of Orthopaedic Surgery Juntendo University Shizuoka Hospital Shizuoka Japan Department of Bio-Engineering Shizuoka Medical Research Center for Disaster Juntendo University Shizuoka Hos-pital Shizuoka Japan

Background: The aim of this study is to identify the factors influence on the broaching hammering sound character during cementless total hip arthroplasty. Methods: We analyzed frequency spectrum of the hammering sound for 49 cases of uncomplicated cementless THAs using two types of proximal-coated stem performed by experienced surgeons. Normalized sound pressure (NSP) of each 0.5 kHz frequency band in final stage of broach procedure was determined by the fast Fourier transform analysis. The relationships between those sound characteristics and femoral morphology such as canal calcar ratio (CCR), Canal flare index (CFI), morphological cortical index (MCI) and femoral shaft length (FSL) in different cementless stem were investigated. Results: In Accolade 2, CCR was positively related to NSP in several bands [Frequency band (kHz);r: 2.0 - 2.5;0.37, 4.5 - 5.0;0.37, 9.5 - 10.0;0.44], and negatively related to 7.5 - 8.0 kHz (r = -0.39). Negative correlations were observed among CFI and MCI in specific frequency bands (4.5 - 5.0, 5.0 - 5.5, and 7.5 - 8.0 kHz). In Taperloc Microplasty, strong correlations were found between FSL and the NSP of 7.5. - 8.0 kHz (r = 0.78) and CCR and the 7.5 - 8.0 kHz bands. There was significant difference of NSPs between high and low group divided by morphological parameters. Acoustic characteristics of NSPs between Accolade 2 and Microplasty were significantly different in 9 frequency bands. Conclusions: The hammering sound correlated with four parameters of the femoral morphology and differed in different types of proximal-coated stem. Those novel five factors are important to consider when to predict complications using acoustic analysis.

关键词： Total Hip Arthroplasty Cementless Stem Hammering Sound Fast Fourier Transform Femoral Morphology

Analysis of Human-in-the-loop System with Visual Feedback

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Analysis of Human-in-the-loop System with Visual Feedback

第二十四届中国控制会议

作者： M. Iwase S. Hatakeyama K. Furuta Dept. of Computers and Systems Engineering Tokyo Denki Univeristy Hatoyama Hiki-gun Saitama 350-0394 JAPAN Dept. of Computers and Systems Engineering Tokyo Denki Univeristy Hatoyama Hiki-gun Saitama 350-0394 JAPAN Dept. of Computers and Systems Engineering Tokyo Denki Univeristy Hatoyama Hiki-gun Saitama 350-0394 JAPAN

＜正＞ Human Adaptive Mechatronics is the coined name for a research project at tokyo denki university sponsored by Ministry of Education, Sports, Culture, Science and Technology （MEXT）. Human Adaptive Mechatronics consists of Human and Mechatronics, and aims to develop Mechatronic systems adapting and assisting human operations. In this paper, the human control action of human-in-the-loop system is studied paying attention to the rate saturation of actuators and visual feedback. To analyze the performance of human operations with such factors, the swing-up of a pendulum by human hand was studied.

关键词： Human Adaptive Mechatronics Visual feedback

Relationship of Abundance of Oceanic Sea Skaters, Halobates in the Tropical Pacific Ocean to Surface Biomass and Chlorophyll/Oxygen Concentrations

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Natural Science 2016年第6期8卷 264-270页

作者： Takahiro Furuki Takero Sekimoto Noritomo Umamoto Mitsuru Nakajo Chihiro Katagiri Tetsuo Harada Laboratory of Environmental Physiology Graduate School of Integrated Arts and Sciences Kochi University Kochi Japan Laboratory of Science Education Graduate School of Integrated Arts and Sciences Kochi University Kochi Japan tokyo denki university Tokyo Japan Graduate School of Integrated Arts and Sciences Kochi University Kochi Japan

Relationship of population density of oceanic sea skaters collected from tropical and subtropical zones in the Pacific Ocean was examined to chlorophyll concentration/Dissolved Oxygen concentration and biomass in surface sea water. The four parameters shown above were measured at the site of 12oN 135oN during the cruise, MR13-03 cruise, and at the site of 25oN 160oE during another cruise KH-14-02. Significant and positive correlation between all biomass (especially invertebrates) and population density of oceanic sea skaters collected with a Neuston-Net trailing during 15 min was shown in overall analysis on the data of the both samplings (p oN 160oE than that at 12oN 135oN with similar value of chlorophyll value (p oN 160oE than that at 12oN 135oN for keeping high density population of oceanic sea skaters.

关键词： Oceanic Sea Skaters Chlorophyll Concentration/Dissolved Oxygen Concentration Biomass in the Neuston Net

Comparative Study of Salinity Tolerance an Oceanic Sea Skater, Halobatesmicansand Its Closely Related Fresh Water Species, Metrocorishistrio

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Natural Science 2014年第14期6卷 1141-1148页

作者： Takero Sekimoto Yuki Osumi Takashi Shiraki Akane Kobayashi Kentaro Emi Mitsuru Nakajo Masatoshi Moku Vladimir Kostal Chihiro Katagiri Tetsuo Harada Laboratory of Environmental Physiology Graduate School of Integrated Arts and Sciences Kochi University Kochi Japan Atmosphere and Ocean Research Institute The University of Tokyo Tokyo Japan Institute of Entomology Biology Center of the Academy of Sciences CR Ceske Budejovice Czech Republic Division of Life Science and Engineering School of Science and Engineering Tokyo Denki University Hatoyama-cho Japan

This study aims, first, to examine the limit for tolerance to lower salinity by an oceanic sea skater, Halobates micans, and , second, to make it clear whether exclusively fresh water Halobatinae species, Metrocoris histrio has salinity tolerance. Adults of H. micans were collected using Neuston Net from the starboard side of R/V MIRAI on a fixed station at 8°S, 80°E, whereas those of M. histrio were collected from a small pond filled with a spring fresh water in Kochi (33°N, 133°E), Japan. Time in survival was measured in starved condition under several salinity conditions: 0‰, 2‰, 4‰, 6‰, 8‰, 9‰ and 10‰ for H. micans;0‰, 5‰, 10‰, 12.5‰, 15‰ for M. histrio. Half of adults were in coma due to lower salinity under 10‰ and time in survival was less than 10 hours under less than 4‰ for H. micans. Time in survival was half at 5‰ of 80 hours on average at 0‰ as a control and less than 10 hours at 10‰ or higher salinity for M. histrio. Relatively flexible osmo-regulation ability by H. micans would be related to wide variety of salinity condition of surface oceanic water, whereas very limited tolerance even to lower salinity of 5‰ may be permitted by the no chances to be exposed to brackish water in natural habitats of M. histrio. This study showed that salinity tolerance of Halobatinae species would reflect, directly, the salinity condition of their habitats.

关键词： Oceanic Sea Skaters Fresh Water Halobates mican sand Its Closely Related Fresh Water Species Metrocoris histrio

A MIXED ANALOG/DIGITAL CHAOTIC NEURO-COMPUTER HARDWARE SYSTEM AND ITS APPLICATIONS

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A MIXED ANALOG/DIGITAL CHAOTIC NEURO-COMPUTER HARDWARE SYSTE...

The Second International Conference on Dynamics Vibration and Control

作者： Yoshihiko Horio Kazuyuki Aihara Department of Electronic Engineering tokyo denki university Chiyoda-kuTokyo101-8457Japan Aihara Complexity Modeling Project ERATO JSTShibuya-ku151-0064.Japan and Institute of Industrial ScienceUniversity of TokyoMeguro-kuTokyo153-8505Japan

＜正＞We construct a 400-neuron chaotic neuro-computer hardware system with analog integrated circuits. The analog circuitry can handle real numbers, so that our system physically implements the real number processing with chaotic dynamics. We illustrate applications of the system to a dynamical associative memory （DAM） and a quadratic assignment problem （QAP）. From experiments on the DAM, we

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