研究者詳細 - 髙橋　智

論文 - 髙橋　智

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Does Temporal Expectation Driven by Rhythmic Cues Differ From That Driven by Symbolic Cues Across the Millisecond and Second Range? 査読国際共著国際誌

Yanna Ren, Zhihan Xu, Fengxia Wu, Yoshimichi Ejima, Jiajia Yang, Satoshi Takahashi, Qiong Wu, Jinglong Wu

Perception 48 ( 6 ) 515 - 529 2019年6月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SAGE Publications

Temporal expectation relies on different predictive information, such as regular rhythms and symbolic cues, to direct attention to a future moment in time to optimize behaviour. However, whether differences exist between temporal expectations driven by regular rhythms and symbolic cues has not been clearly established. In this study, 20 participants performed two temporal expectation tasks in which a rhythmic cue or a symbolic cue indicated (70% expected) that the target would appear after an interval of 500 ms (short), 1,500 ms (medium), or 2,500 ms (long). We found larger cueing effects for the rhythmic cued task than for the symbolic cued task during the short interval, indicating that rhythmic cues were more effective in improving performance. Furthermore, no significant difference was found during the longer interval, reflect that the behavioural differences between the two forms of temporal expectations were likely to diminish as the time interval increased. Thus, we speculate that the temporal expectation driven by rhythmic cues differs from that driven by symbolic cues only in the limited time range; however, the mechanisms underlying the two forms of temporal expectations trend to become more similar over increasing temporal scales.

DOI： 10.1177/0301006619847579

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その他リンク： http://journals.sagepub.com/doi/full-xml/10.1177/0301006619847579

Visual Identification Attenuates Audiovisual Interaction 査読

Wu F, Ren Y, Tang X, Wu Q, Ejima Y, Yang J, Takahashi S, Wu J

Information 21 ( 7 ) 2059 - 2069 2018年5月

Comparison for younger and older adults: Stimulus temporal asynchrony modulates audiovisual integration 査読国際共著

Yanna Ren, Yanling Ren, Weiping Yang, Xiaoyu Tang, Fengxia Wu, Qiong Wu, Satoshi Takahashi, Yoshimichi Ejima, Jinglong Wu

International Journal of Psychophysiology 124 1 - 11 2018年2月

Absent Audiovisual Integration Elicited by Peripheral Stimuli in Parkinson’s Disease 査読国際誌

Yanna Ren, Keisuke Suzuki, Weiping Yang, Yanling Ren, Fengxia Wu, Jiajia Yang, Satoshi Takahashi, Yoshimichi Ejima, Jinglong Wu, Koichi Hirata

Parkinson's Disease 2018 1 - 10 2018年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Hindawi Limited

The basal ganglia, which have been shown to be a significant multisensory hub, are disordered in Parkinson’s disease (PD). This study was to investigate the audiovisual integration of peripheral stimuli in PD patients with/without sleep disturbances. Thirty-six age-matched normal controls (NC) and 30 PD patients were recruited for an auditory/visual discrimination experiment. The mean response times for each participant were analyzed using repeated measures ANOVA and race model. The results showed that the response to all stimuli was significantly delayed for PD compared to NC (all<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>p</mml:mi><mml:mo><</mml:mo><mml:mn>0.01</mml:mn></mml:mrow></mml:math>). The response to audiovisual stimuli was significantly faster than that to unimodal stimuli in both NC and PD (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mrow><mml:mi>p</mml:mi><mml:mo><</mml:mo><mml:mn>0.001</mml:mn></mml:mrow></mml:math>). Additionally, audiovisual integration was absent in PD; however, it did occur in NC. Further analysis showed that there was no significant audiovisual integration in PD with/without cognitive impairment or in PD with/without sleep disturbances. Furthermore, audiovisual facilitation was not associated with Hoehn and Yahr stage, disease duration, or the presence of sleep disturbances (all<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M3"><mml:mrow><mml:mi>p</mml:mi><mml:mo>></mml:mo><mml:mn>0.05</mml:mn></mml:mrow></mml:math>). The current results showed that audiovisual multisensory integration for peripheral stimuli is absent in PD regardless of sleep disturbances and further suggested the abnormal audiovisual integration might be a potential early manifestation of PD.

DOI： 10.1155/2018/1648017

PubMed

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その他リンク： http://downloads.hindawi.com/journals/pd/2018/1648017.xml

Audiovisual Integration Delayed by Stimulus Onset Asynchrony Between Auditory and Visual Stimuli in Older Adults 査読

Yanna Ren, Weiping Yang, Kohei Nakahashi, Satoshi Takahashi, Jinglong Wu

Perception 46 ( 2 ) 205 - 218 2017年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SAGE Publications

Although neuronal studies have shown that audiovisual integration is regulated by temporal factors, there is still little knowledge about the impact of temporal factors on audiovisual integration in older adults. To clarify how stimulus onset asynchrony (SOA) between auditory and visual stimuli modulates age-related audiovisual integration, 20 younger adults (21–24 years) and 20 older adults (61–80 years) were instructed to perform an auditory or visual stimuli discrimination experiment. The results showed that in younger adults, audiovisual integration was altered from an enhancement (AV, A ± 50 V) to a depression (A ± 150 V). In older adults, the alterative pattern was similar to that for younger adults with the expansion of SOA; however, older adults showed significantly delayed onset for the time-window-of-integration and peak latency in all conditions, which further demonstrated that audiovisual integration was delayed more severely with the expansion of SOA, especially in the peak latency for V-preceded-A conditions in older adults. Our study suggested that audiovisual facilitative integration occurs only within a certain SOA range (e.g., −50 to 50 ms) in both younger and older adults. Moreover, our results confirm that the response for older adults was slowed and provided empirical evidence that integration ability is much more sensitive to the temporal alignment of audiovisual stimuli in older adults.

DOI： 10.1177/0301006616673850

Web of Science

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その他リンク： http://journals.sagepub.com/doi/full-xml/10.1177/0301006616673850

The Effects of Aging on Haptic Working Memory During Length Discrimination 査読

Zhiwei Wu, Yinghua Yu, Jiajia Yang, Satoshi Takahashi, Yoshimichi Ejima, Jinglong Wu

Neuroscience and Biomedical Engineering 5 ( 1 ) 74 - 80 2017年

Development and Evaluation of a Tactile Cognitive Function Test Device for Alzheimer's Disease Early Detection 査読

Jiajia Yang, Mohd, Usairy Syafiq, Yinghua Yu, Satoshi Takahashi, Zhenxin Zhang, Jinglong Wu

Neuroscience and Biomedical Engineering 3 ( 2 ) 58 - 65 2015年

Speed matching in-teraction between visual and tactile mo-tion 査読

Liancun Zhang, Jiajia Yang, Yinghua Yu, Satoshi Takahashi, Yuta Araki, Qiang Huang, Jinglong Wu

Neuroscience and Biomedical Engineering 3 ( 1 ) 20 - 26 2015年

Development of a Wide-View Visual Presentation System for Functional MRI Studies of Peripheral Visual 査読

Bin Wang, Jinglong Wu, JiaJia Yang, Yuu Hikino, Satoshi Takahashi, Tianyi Yan, Seiichiro Ohno, Susumu Kanazawa

BRAIN AND HEALTH INFORMATICS 8211 277 - 286 2013年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：SPRINGER-VERLAG BERLIN

In present paper, we described a novel wide-view visual presentation system for fMRI studies. To achieve a wide field view, a translucent spherical screen with a curvature radius of 30 mm was placed 30 mm away from the subjects' eyes. The subjects wore contact lenses that enabled them to focus on the screen, and the resulting visual field reached 120 degrees. Then, high resolution computer-generated images were projected onto the translucent hemispheric screen inside the MRI bore. Signal-to-noise ratio valuation experiment was performed to evaluate the clarity and quality of the MRI images. In addition, we successfully applied this visual presentation system to studies of visual retinotopic mapping and object perception neural function in the peripheral visual field. Our study demonstrated that the system is compatible with the MRI environment. Moreover, this system was more effective at mapping checkerboard stimuli in V1-V3, and successfully located several classical category-selective areas, including the face-selective area (FFA), occipital face area (OFA), house-selective area (PPA), transverse occipital sulcus (TOS), lateral occipital complex (LOC) in higher-level visual areas. In conclusion, the wide-view visual presentation system within the MRI environment can be applied to many kinds of fMRI studies of peripheral vision.

Web of Science

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Flow Electrification of Insulated Liquid in Metal Pipes 査読

Zhu Shouxin, Liu Lin, Takahashi Satoshi

Chinese Journal of Mechanical Engineering 25 ( 6 ) 1115 - 1120 2012年

Producing single microbubbles with controlled size using microfiber 査読

Deguchi, S, Takahashi, S, Tanimura, S, Hiraki, H

Advances in Bioscience and Biotechnology 2011年

Experimental Study on Measurement Method of Flow Electrification 査読

Shou Xin Zhu, Wen Jun Hu, Hui Meng Zheng, Satoshi Takahashi

Applied Mechanics and Materials 43 303 - 307 2010年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Trans Tech Publications, Ltd.

When a relative motion occurring between liquid and solid, electric charges with opposite signs come out separately on each side by friction which phenomena is called flow electrification. As the amount of charge generated by flow electrification is small, and part of which neutralize each other at the same time, the test method of flow electrification becomes one of discussion topics for scientists of all countries. This paper introduces an experimental measurement method of flow electrification, which is a comparative method by inserting electrodes in pipelines, and acquisition amplifier circuit, with high resolution and strong anti-jamming ability. Experiments show that the measurement method could be applied to system testing for flow electrification.

DOI： 10.4028/www.scientific.net/amm.43.303

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Nucleation and subsequent cavitation in a hydraulic oil poppet valve 査読

S Washio, S Kikui, S Takahashi

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224 ( 4 ) 947 - 958 2010年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SAGE Publications

If bubble nuclei are the cause of cavitation, how are they initially produced? According to what Washio et al. have found out so far, there are two possible ways for cavitation nuclei to be generated in liquid flows: separation of flow and a relative motion between solids contacting in liquid. The present article intends to reinforce that assertion by observing the cavitation occurring in an oil hydraulic poppet valve.

At a certain flowrate, a microscopic cavity suddenly emerged on the valve seat where the flow separated. As the flowrate increased, the cavity developed extending circumferentially on the seat and discharged bubbles by splitting. A collision of the poppet with the valve seat also caused the generation of a cavity. As the poppet was away from the seat after the collision, the cavity shrunk leaving behind a bubble.

Cavities generated on the seat by flow separation regularly repeated a process of growth and shrinkage accompanied by bubble discharge, which induced flow pulsation and consequently vibration of the poppet supported by a spring as well. Moreover, these cavities brought about so-called ‘choking’ in the poppet—seat constriction and acted to increase the pressure loss there by narrowing its cross-section.

DOI： 10.1243/09544062jmes1618

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Observation of cavitation inception in separating water flows through constricted channels

S. Washio, S. Fujiyoshi, S. Takahashi

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 223 ( 9 ) 2071 - 2080 2009年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SAGE PUBLICATIONS LTD

The research group including two of the present authors previously discovered a surprising phenomenon in oil flows through constricted channels; at a certain flowrate when there is no cavitation occurring, an infinitesimal cavity suddenly emerges on the wall where the flow separates. The newborn cavity grows and splits releasing many minute bubbles to downstream, as the flowrate increases. To see if this phenomenon occurs in water too, water flows through rectangular and cylindrical constrictions have been meticulously observed with very high resolution in terms of both time and space. As a result it has been confirmed that the same phenomenon does occur in separating water flows as well, although the developing process of a newborn cavity in water flows is different from that in oil flows probably depending on a large difference in Reynolds numbers between both flows. When the flowrate is substantially increased from that for the cavity inception, a large attached cavity is formed on the wall just downstream of the separation point, as it occurred in corresponding oil flows. The pressure inside the cavity has proved to be almost equal to the saturation vapour pressure of water.

DOI： 10.1243/09544062JMES1438

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Human Characteristics on Length Perception with Three Fingers for Tactile Intelligent Interfaces 査読

Haibo Wang, Jinglong Wu, Satoshi Takahashi

ACTIVE MEDIA TECHNOLOGY, PROCEEDINGS 5820 217 - 225 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：SPRINGER-VERLAG BERLIN

When an object is touched, the properties like shape, temperature, rigidity, texture and weight should be perceived. As a basic research of human tactile, it is most important to know how humans could perceive the shape of the object with fingers. Thus length and contacting curvature of an object are thought to provide important perception information. Most of the length perception studies are about two fingers using the thumb and the index finger. There are scarce perception studies using multi-fingers grasping. In present study, to investigate the human tactile length perception mechanism with multi-fingers, we develop a tactile length interface device for one and two lengths with three fingers and conduct two experiments of one and two lengths perception with three fingers grasping. The results showed that within the length range of 40 similar to 100mm, the one length perception was better than two lengths length perception and in two length perception, better perception took place when shorter lengths were presented to the thumb and the index finger compared to being presented to the thumb and the middle finger. As a result of force sensor, grip forces show no significant difference in the range of stimulating length.

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Singular properties of flow separation as a real cause of cavitation inception

S. Washio, S. Takahashi, K. Uemura, T. Iwamoto, T. Ogata

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 222 ( 4 ) 667 - 678 2008年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SAGE PUBLICATIONS LTD

At the very beginning stage of cavitation an infinitesimal cavity suddenly emerges and rapidly grows on the wall close to the point of flow separation. The present paper intends to make clear the mechanism of this peculiar phenomenon previously discovered by the present authors in oil flows, by experimentally examining the characteristics of a separating flow. First, pressure and temperature distributions along a cylindrical smooth wall in an oil flow were measured across the point of separation, which has proved that both tensile stress and heat are really generated near the separation point. Second, a laminar air flow passing over a sharp edge was inspected by particle image velocimetry (PIV). The inspection of the separating flow based on the PIV data has revealed that fluid particle near the separation point is not only drastically stretched but also intensely sheared along the separation streamline. With all the results integrated, it has been concluded that the singular structure of a separating flow is the real cause of both tensile stress and heat generation. When thus generated tension exceeds a threshold, it possibly breaks the adhesion between the liquid and the wall, leaving a microscopic rift on the interface that would grow to a visible cavity.

DOI： 10.1243/09544062JMES835

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液中で接触する固体面の相対加速度運動に起因する空洞初生

鷲尾誠一, 高橋智, 村上健二, 多田達誠, 出口真次

日本機械学会論文集(B編) 74 ( 742 ) 1376 - 1385 2008年

記述言語：日本語出版者・発行元：一般社団法人日本機械学会

A contact motion between two solids in liquid can give birth to a cavity. To investigate the phenomenon, processes of cavity generation in a liquid between two walls making accelerated relative motions in their normal and tangential directions have been observed in detail, using microscopes and high-speed video cameras. Generation and subsequent expansion of a cavity are dominated by such various factors as the thickness of a liquid film, the acceleration of motion, the initial pressure, the liquid viscosity and the contact area. On the other hand the air solubility in oil influences, not the generation but the size of a bubble remaining after the process is over. The pressure in a liquid film between two parallel walls normally separating with a constant acceleration has also been theoretically analyzed, providing the basis for occurrence of tensile stresses in liquid films. Finally, the following idea has been proposed as a mechanism of the phenomenon ; a tensile stress occurring in a liquid film breaks the liquid-solid interface, producing a rift which can develop to a visible cavity. Considering liquid machines have many parts of solid-solid contact in liquid, it should be pointed out that some of the cavitations occurring in them can start from these cavities.

DOI： 10.1299/kikaib.74.1376

CiNii Article

CiNii Books

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速度変化を伴う油の流れに生じる流動帯電現象の測定

高橋智, 祝守新, 鷲尾誠一, 田里友希

静電気学会 32 ( 1 ) 25 - 30 2008年

Unsteady Characteristics of Nonlinear Pressure Loss in a Flow through a Restrictor

Seiichi WASHIO, Huiqing CHEN, Satoshi TAKAHASHI

Journal of Fluid Science and Technology 3 ( 1 ) 11 - 21 2008年

記述言語：英語出版者・発行元：The Japan Society of Mechanical Engineers

To elucidate the unsteady characteristics of a nonlinear pressure loss generated in a restricted flow, pressure drops across and flow rates through an orifice were precisely measured in sinusoidally oscillating oil flows. It has turned out that the unsteady relationship between the nonlinear pressure loss and the flow rate describes a closed loop turning around along the characteristic curve of the steady-state one in the counter-clockwise direction, which indicates that the change of the nonlinear pressure loss is delayed behind that of the flow rate in an unsteady orifice flow. The phenomenon occurs probably because the structure of turbulence in an orifice jet flow, where a nonlinear pressure loss is generated by energy dissipation, has inertia against a change of the flow rate and cannot follow it without a time lag. A mathematical model incorporating a constant time lag into the steady-state nonlinear pressure loss was proposed to simulate the unsteady characteristics of the nonlinear pressure loss, successfully explaining the long-term question in acoustics why the reactive part of an acoustic orifice impedance decreases as the amplitude increases.

DOI： 10.1299/jfst.3.11

CiNii Article

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絶縁性流体と金属網との間の流動帯電基礎特性の実験的検討

高橋智, 祝守新, 鷲尾誠一, 藤原人司

日本機械学会論文集(C編) 73巻 ( 727号 ) 871 - 878 2007年

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