Kazuhiro Takahashi

ORCID: 0000-0002-8983-1884
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About
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Research Areas
  • Analytical Chemistry and Sensors
  • Advanced MEMS and NEMS Technologies
  • Photonic and Optical Devices
  • Mechanical and Optical Resonators
  • CCD and CMOS Imaging Sensors
  • Optical Coatings and Gratings
  • Electrochemical sensors and biosensors
  • Plasmonic and Surface Plasmon Research
  • Advanced Fiber Optic Sensors
  • Vibration and Dynamic Analysis
  • Advanced Chemical Sensor Technologies
  • Advancements in Photolithography Techniques
  • Neuroscience and Neural Engineering
  • Gas Sensing Nanomaterials and Sensors
  • Force Microscopy Techniques and Applications
  • Photonic Crystals and Applications
  • Microfluidic and Capillary Electrophoresis Applications
  • Biosensors and Analytical Detection
  • Advanced Biosensing Techniques and Applications
  • Quantum Dots Synthesis And Properties
  • Photoreceptor and optogenetics research
  • Advanced Surface Polishing Techniques
  • Mechanical Behavior of Composites
  • Neuroscience and Neuropharmacology Research
  • Nanofabrication and Lithography Techniques

Toyohashi University of Technology
2016-2025

Muroran Institute of Technology
2017-2024

Fukushima Medical University
2024

Biosensor (Italy)
2021-2022

National Institute of Technology, Ichinoseki College
2022

Canon (Japan)
2000-2020

Technological University of Tajikistan
2020

Japan Science and Technology Agency
2011-2019

Chitose Institute of Science and Technology
2012

The University of Tokyo
1979-2011

In muscle force analysis, orientations and moment arms of the muscles about a joint provide essential coefficients in equilibrium equations. For determination these parameters, several experimental techniques, including geometric measurement, tendon-joint displacement measurement direct load are available. Advantages disadvantages associated with each techniques reviewed compared based on our extensive experience.

10.1115/1.3138494 article EN Journal of Biomechanical Engineering 1984-08-01

Abstract This study proposes an AI-based filter-free wavelength sensor (FFS) system that identifies wavelengths using the absorption coefficient of silicon. Conventional systems rely on optical components, making them complex and difficult to miniaturize. Additionally, signals are prone environmental electrical interference. The proposed system, which consists analog circuit for signal conversion a microcontroller with machine learning algorithms, processes calculates in real-time. It can...

10.35848/1347-4065/ada77f article EN cc-by-nc-nd Japanese Journal of Applied Physics 2025-01-08

A process technology was developed for transferring strained graphene sheets using an elastomer nanosheet to enhance the resonance characteristics of a resonator. The strain-induced resonator demonstrated 1.80-fold...

10.1039/d4nr04571h article EN Nanoscale 2025-01-01

In this paper, we introduce a calculation method for in-plane eddy currents produced by perpendicular flux at stator core-ends of turbine generators. the method, laminated core is subdivided into each electrical steel sheet 3-D finite elements. The insulated layers sheets are modeled gap elements, which represent magnetic resistance layers. combination double nodes and anisotropic conductivity proposed to consider insulation between sheets. It especially required teeth with slits. validity...

10.1109/tmag.2007.916246 article EN IEEE Transactions on Magnetics 2008-05-20

Demand for the detection of carbon dioxide (CO 2 ) is increasing in various fields, including air-quality monitoring, healthcare, and agriculture. On other hand, smart gas sensors, which micromachined sensors are integrated with driving circuits, desirable toward development society internet things. In this study, hotplate-based CO were fabricated their characteristics investigated. The have La O 3 /SnO stacked layers as a sensing material Pt interdigitated electrodes. A response 2.9...

10.3390/s17092156 article EN cc-by Sensors 2017-09-20

Various biosensing platforms for real-time monitoring and mapping of chemical signals in neural networks have been developed based on CMOS process technology. Despite their achievements, however, there remains a demand an advanced method that can offer detailed insights into cellular functions with higher spatiotemporal resolution. Here, we present pH image sensor employs high-density array 256 × pixels readout circuitry designed fast operation. The sensor's characteristics, such as the...

10.1109/tbcas.2019.2895069 article EN IEEE Transactions on Biomedical Circuits and Systems 2019-01-24

10.1016/0022-460x(91)90752-6 article EN Journal of Sound and Vibration 1991-01-01

Abstract Recent studies have shown that protons can function as neurotransmitters in cultured neurons. To further investigate regional and neural activity-dependent proton dynamics the brain, development of a device with both wide-area detectability high spatial-ltemporal resolution is necessary. Therefore, we develop an image sensor spatial-temporal specifically designed for measuring vivo. Here, demonstrate spatially deferent stimulation by visual induced distinct patterns changes cortex....

10.1038/s41467-020-14571-y article EN cc-by Nature Communications 2020-02-05

We have developed novel device architecture of comb-driven double-gimbal XY-stage high fill-factor (stage area / chip size), which has been realized for the first time by topologically separating actuator elements in two layers: all electrical parts (electrodes and interconnections) are Silicon-on-Insulator (SOI) layer, while mechanical (suspensions, frame, XY-stage) substrate. Thanks to new layered structures, overall footprint made small. The moved 19µm X Y direction independently, also...

10.1587/elex.3.197 article EN IEICE Electronics Express 2006-01-01

We have developed a surface stress sensor based on microelectromechanical Fabry–Perot interferometer with high wavelength selectivity by using Au half-mirrors, for highly sensitive label-free biosensing. When the target molecule is adsorbed antigen–antibody reaction onto movable membrane thin film, which acts as an upper mirror of optical interferometer, amount deflection deflected change in can be detected sensitivity. To improve signal at small region this biosensor resulting detection low...

10.1088/1361-6439/aaaa80 article EN Journal of Micromechanics and Microengineering 2018-01-25

Abstract We report a new method for continuously controlling surface-plasmon (SP) excitation wavelengths using nanomechanically stretched metal subwavelength grating. An aluminum grating is integrated with electrostatic comb-drive actuators to expand the period, which allows continuous control of dependent wavelength. successfully demonstrated that wavelength over 542–668 nm range varies square applied voltage, agrees well theory actuation. This modulation can provide functions readjustment...

10.7567/apex.9.027201 article EN Applied Physics Express 2016-01-08

Abstract We report a newly developed equivalent electrical circuit for microelectromechanical systems (MEMS) based on simulator Qucs (Quite Universal Circuit Simulator). An analog computing solver the equation of motion (EOM) has been interpreted to an by using capacitor as ideal mathematic integrator. Viscoelastic suspension and electrostatic parallel‐plate actuator are modeled subcircuits that can be cosolved with EOM module. Those subcircuit models used building blocks numerically...

10.1002/tee.20642 article EN IEEJ Transactions on Electrical and Electronic Engineering 2011-01-12
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