D. Koyama

发表

Electric power generation using a vibration of a polyurea piezoelectric thin film

K. Nakamura, D. Koyama, K. Nakamura, 2008, 2008 IEEE Ultrasonics Symposium.

Plate-shaped non-contact ultrasonic transporter using flexural vibration.

Kentaro Nakamura, D. Koyama, Y. Mizuno, 2014, Ultrasonics.

Design of a junction for a noncontact ultrasonic transportation system

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2013, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.

A design of ultrasonic compaction tools for metal powder magnetic core of motors

K. Nakamura, D. Koyama, S. Kikuchi, 2008, 2008 IEEE Ultrasonics Symposium.

A Hybridized Discontinuous Galerkin FEM with Lifting Operator for Plane Elasticity Problems

F. Kikuchi, D. Koyama, 2014 .

On volumetric locking in a hybrid symmetric interior penalty method for nearly incompressible linear elasticity on polygonal meshes

F. Kikuchi, D. Koyama, 2017 .

Ultrasound liquid crystal lens with enlarged aperture using traveling waves.

M. Matsukawa, D. Koyama, Jessica Onaka, 2021, Optics letters.

Development of Multiple-Frequency Ultrasonic Imaging System Using Multiple Resonance Piezoelectric Transducer

Daisuke Koyama, Iwaki Akiyama, Kentaro Nakamura, 2012 .

Vibration characteristics and persistence of poloxamer- or phospholipid-coated single microbubbles under ultrasound irradiation.

M. Matsukawa, D. Koyama, H. Tabata, 2019, Langmuir : the ACS journal of surfaces and colloids.

Numerical simulation of compressible fluid flow in an ultrasonic suction pump.

Kentaro Nakamura, D. Koyama, Y. Wada, 2016, Ultrasonics.

Modeling and Performance Evaluation of an Ultrasonic Suction Pump

Kentaro Nakamura, S. Ueha, D. Koyama, 2008 .

A design of a miniature ultrasonic pump using a bending disk transducer

Kentaro Nakamura, S. Ueha, D. Koyama, 2008 .

Improvement in the Flow Rate of a Miniature Ultrasonic Suction Pump

Kentaro Nakamura, S. Ueha, D. Koyama, 2007 .

Vibration of a single microcapsule with a hard plastic shell in an acoustic standing wave field

K. Nakamura, D. Koyama, H. Kotera, 2011, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

Measurement of a single microcapsule vibration in an acoustic standing wave field

Kentaro Nakamura, D. Koyama, Kenji Yoshida, 2010, 2010 IEEE International Ultrasonics Symposium.

Acoustic destruction of a microcapsule having a hard plastic shell

D. Koyama, W. Kiyan, Yoshiaki Watanabe, 2006, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

Polarization information landscapes expanded from single-shot images of ring-like diffraction patterns

D. Koyama, A. Emoto, M. Ishikawa, 2021, OSA Continuum.

Acoustic streaming in an ultrasonic air pump with three-dimensional finite-difference time-domain analysis and comparison to the measurement.

Kentaro Nakamura, D. Koyama, Y. Wada, 2014, Ultrasonics.

Array Configurations for Higher Power Generation in Piezoelectric Energy Harvesting

Daisuke Koyama, Kentaro Nakamura, Kentaro Nakamura, 2010 .

Array configurations for higher power generation in piezoelectric energy harvesting

Daisuke Koyama, Kentaro Nakamura, Kentaro Nakamura, 2009, 2009 IEEE International Ultrasonics Symposium.

Electric power generation using a vibration of a polyurea piezoelectric thin film

Daisuke Koyama, Kentaro Nakamura, Kentaro Nakamura, 2008 .

DIRICHLET-TO-NEUMANN FINITE ELEMENT METHODS FOR WAVE PROBLEMS

D. Koyama, 2006 .

Noncontact Transportation of Planar Object in an Ultrasound Waveguide

M. Matsukawa, D. Koyama, Kentaro Masuda, 2018, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.

Two-dimensional noncontact transportation of small objects in air using flexural vibration of a plate

M. Matsukawa, D. Koyama, Ryota Kashima, 2014, 2014 IEEE International Ultrasonics Symposium.

Noncontact ultrasonic transportation of droplet using an acoustic waveguide

Kentaro Nakamura, D. Koyama, M. Ding, 2012, 2012 IEEE International Ultrasonics Symposium.

A Simultaneous Observation System for Microbubble Vibration in an Acoustic Field by using a High-speed Camera and an LDV

Kentaro Nakamura, D. Koyama, Kenji Yoshida, 2010 .

A stator for a self-running, ultrasonically-levitated sliding stage

K. Nakamura, D. Koyama, S. Ueha, 2007, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

A self-running ultrasonically levitated 2D stage using flexural vibrating plates

Kentaro Nakamura, D. Koyama, 2010 .

Self-Running Non-Contact Ultrasonically Levitated Stage

Kentaro Nakamura, D. Koyama, 2010 .

Noncontact Self-Running Ultrasonically Levitated Two-Dimensional Stage Using Flexural Standing Waves

Kentaro Nakamura, D. Koyama, 2009 .

Application of a Fictitious Domain Method to 3 D Helmholtz Problems

D. Koyama, 2022 .

Experimental Study on an Ultrasonic Purification Apparatus for Civil Engineering Use

Sadayuki Ueha, Daisuke Koyama, Kentaro Nakamura, 2008 .

Estimation of absolute sound pressure in a small-sized sonochemical reactor.

Daisuke Koyama, Shinji Sato, Kentaro Nakamura, 2013, Ultrasonics sonochemistry.

Miniaturization of the traveling wave ultrasonic linear motor using series connection of bimorph transducers

K. Nakamura, D. Koyama, K. Nakamura, 2011, 2011 IEEE International Ultrasonics Symposium.

Meshless bubble filter using ultrasound for extracorporeal circulation and its effect on blood.

D. Koyama, Yoshiaki Watanabe, Koji Mino, 2015, Ultrasound in medicine & biology.

Sound pressure threshold of non-spherical oscillation of an attached bubble evaluated by a laser Doppler vibrometer

Kentaro Nakamura, D. Koyama, M. Ueda, 2012, 2012 IEEE International Ultrasonics Symposium.

Liquid lens using acoustic radiation force

Kentaro Nakamura, D. Koyama, R. Isago, 2010, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

Artepillin C isoprenomics: design and synthesis of artepillin C isoprene analogues as lipid peroxidation inhibitor having low mitochondrial toxicity.

H. Nagasawa, D. Koyama, Y. Uto, 2006, Bioorganic & medicinal chemistry.

Measurement of sound pressure and temperature in tissue-mimicking material using an optical fiber Bragg grating sensor

Kentaro Nakamura, D. Koyama, I. Akiyama, 2016, Journal of Medical Ultrasonics.

Control of liquid crystal molecular orientation using ultrasound vibration

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2016 .

Palladium-catalyzed carbostannylation by means of reagents containing carbon–tin–halogen inter-element linkages

D. Koyama, K. Kawata, M. Kosugi,, 2000 .

A mixed-type finite element approximation for radiation problems using fictitious domain method

H. M. Nasir, D. Koyama, T. Kako, 2003 .

Observation of destruction of hard shell microcapsules in an acoustic field

D. Koyama, W. Kiyan, Yoshiaki Watanabe, 2004 .

OPTICAL OBSERVATION OF DESTRUCTION OF MICROCAPSULES USING A HIGH-SPEED VIDEO CAMERA

D. Koyama, W. Kiyan, Y. Watanabe, 2003 .

Quantitative evaluation of the mortality rate of HeLa cells induced by microbubble vibration and collapse under pulsed ultrasound irradiation

D. Koyama, Arisa Hirayama, Ryuta Akashi, 2021 .

Microbubbles with a Self-Assembled Poloxamer Shell and a Fluorocarbon Inner Gas.

D. Koyama, H. Tabata, M. Krafft, 2016, Langmuir : the ACS journal of surfaces and colloids.

Recombination, Solvation and Reaction of CN Radicals Following Ultraviolet Photolysis of ICN in Organic Solvents.

G. M. Greetham, I. Sazanovich, D. Koyama, 2015, The journal of physical chemistry. A.

Measurement of a microcapsule vibration having a hard plastic shell in an acoustic standing wave

Kentaro Nakamura, D. Koyama, Kenji Yoshida, 2010 .

Ultrasonically-induced electrical potentials in demineralized bovine cortical bone

M. Matsukawa, D. Koyama, T. Yanagitani, 2018 .

Transportation and discrimination of cells using ultrasound flexural vibration of a glass substrate

M. Matsukawa, D. Koyama, T. Otsuka, 2019, Japanese Journal of Applied Physics.

Evidence for a Double Well in the First Triplet Excited State of 2-Thiouracil.

D. Koyama, A. Orr-Ewing, M. J. Milner, 2017, The journal of physical chemistry. B.

Measurement of the Resonant Characteristics of a Single Bubble Vibration by Using a Laser Doppler Vibrometer

Kentaro Nakamura, D. Koyama, Kenji Yoshida, 2011 .

Three-dimensional variable-focus liquid lens using acoustic radiation force

K. Nakamura, D. Koyama, R. Isago, 2011, 2011 IEEE International Ultrasonics Symposium.

Anti-inflammatory effects of a bioavailable compound, Artepillin C, in Brazilian propolis.

A. Vollmar, V. Dirsch, H. Nagasawa, 2008, European journal of pharmacology.

The Luminescence from a Long Lasting Phosphor Exposed to Alpha, Beta, and Gamma Rays

D. Koyama, S. Uchida, Y. Satoh, 2002 .

The temperature dependence of luminescence from a long-lasting phosphor exposed to ionizing radiation

D. Koyama, S. Uchida, Y. Satoh, 2002 .

Noncontact ultrasonic transportation of small objects over long distances in air using a bending vibrator and a reflector

Daisuke Koyama, Kentaro Nakamura, Kentaro Nakamura, 2010, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

Noncontact ultrasonic transportation of small objects in a circular trajectory in air by flexural vibrations of a circular disc

Daisuke Koyama, Kentaro Nakamura, Kentaro Nakamura, 2010, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

A self-running standing wave-type bidirectional slider for the ultrasonically levitated thin linear stage

K. Nakamura, D. Koyama, S. Ueha, 2008, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

An ultrasonically levitated non-contact sliding table with the traveling vibrations on fine-ceramic beams

S. Ueha, K. Nakamura, J. Friend, 2005, IEEE Ultrasonics Symposium, 2005..

A chemical biosynthesis design for an antiatherosclerosis drug by acyclic tocopherol intermediate analogue based on "isoprenomics".

H. Nagasawa, D. Koyama, Y. Uto, 2009, Advances in experimental medicine and biology.

Ultrasound bubble filter using the flexural vibration of a cylinder for an extracorporeal circulation circuit

Kentaro Nakamura, D. Koyama, Kenji Yoshida, 2013 .

Piezoelectric and Inversely Piezoelectric Responses of Bone Tissue Plates in the Megahertz Range

M. Matsukawa, D. Koyama, Tsukasa Nakamura, 2020, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.

Femtosecond to microsecond observation of the photochemical reaction of 1,2-di(quinolin-2-yl)disulfide with methyl methacrylate.

P. Donaldson, D. Koyama, A. Orr-Ewing, 2017, Physical chemistry chemical physics : PCCP.

Triplet state formation and quenching dynamics of 2-mercaptobenzothiazole in solution.

D. Koyama, A. Orr-Ewing, 2016, Physical chemistry chemical physics : PCCP.

Photochemical reaction dynamics of 2,2'-dithiobis(benzothiazole): direct observation of the addition product of an aromatic thiyl radical to an alkene with time-resolved vibrational and electronic absorption spectroscopy.

D. Koyama, A. Orr-Ewing, 2016, Physical chemistry chemical physics : PCCP.

Ultrafast Observation of a Photoredox Reaction Mechanism: Photoinitiation in Organocatalyzed Atom-Transfer Radical Polymerization.

D. Koyama, A. Orr-Ewing, Harvey J A Dale, 2018, Journal of the American Chemical Society.

Fabrication of oriented hydroxyapatite film by RF magnetron sputtering

M. Matsukawa, D. Koyama, K. Hirata, 2017 .

Error estimates of the finite element method for the exterior Helmholtz problem with a modified DtN boundary condition

Daisuke Koyama, D. Koyama, 2009, J. Comput. Appl. Math..

High-speed noncontact ultrasonic transport of small objects using acoustic traveling wave field

Kentaro Nakamura, Daisuke Koyama, Kentaro Nakamura, 2010 .

Molecular Orientation in a Variable-Focus Liquid Crystal Lens Induced by Ultrasound Vibration

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2020, Scientific Reports.

Ultrasound liquid crystal lens

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2018 .

Varifocal Concave–Convex Lens Using Viscoelastic Gel and Ultrasound Vibration

M. Matsukawa, D. Koyama, Jessica Onaka, 2022, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.

Ultrasonic control of neurite outgrowth direction

D. Koyama, M. Kumeta, Haruki Maruyama, 2021, Scientific Reports.

Periodic pattern of liquid crystal molecular orientation induced by ultrasound vibrations

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2017 .

Movable optical lens array using ultrasonic vibration

Daisuke Koyama, Mami Matsukawa, Kentaro Nakamura, 2016 .

Ultrasonic optical lens array with variable focal length and pitch.

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2012, Optics letters.

Ultrasonic variable-focus optical lens using viscoelastic material

Daisuke Koyama, Ryoichi Isago, Kentaro Nakamura, 2012 .

Compact, high-speed variable-focus liquid lens using acoustic radiation force.

Daisuke Koyama, Ryoichi Isago, Kentaro Nakamura, 2010, Optics express.

Optical evaluation of a double-layered ultrasound liquid crystal lens

M. Matsukawa, D. Koyama, A. Emoto, 2022, Journal of Applied Physics.

Development of evaluation system for cerebral artery occlusion in emergency medical services: noninvasive measurement and utilization of pulse waves

M. Matsukawa, D. Koyama, H. Yamagami, 2023, Scientific Reports.

Efficiency improvement of hybrid transducer-type ultrasonic motor using lubricant

K. Nakamura, D. Koyama, K. Nakamura, 2013, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

Traveling wave type ultrasonic linear motor using twin bending bars

Kentaro Nakamura, H. Yamaura, D. Koyama, 2010 .

Concentration-Dependent Viscoelasticity of Poloxamer-Shelled Microbubbles.

M. Matsukawa, D. Koyama, H. Tabata, 2022, Langmuir : the ACS journal of surfaces and colloids.

Adsorption and Desorption of a Phospholipid from Single Microbubbles under Pulsed Ultrasound Irradiation for Ultrasound-Triggered Drug Delivery.

D. Koyama, M. Nakata, M. Krafft, 2019, Langmuir : the ACS journal of surfaces and colloids.

An a priori error estimate of the Dirichlet-to-Neumann finite element method for multiple scattering problems

D. Koyama, 2014 .

An a priori error estimate of the Dirichlet-to-Neumann finite element method for multiple scattering problems

D. Koyama, 2013, Japan Journal of Industrial and Applied Mathematics.

Error estimates of the DtN finite element method for the exterior Helmholtz problem

Daisuke Koyama, D. Koyama, 2007 .

A controllability method with an artificial boundary condition for the exterior Helmholtz problem

Daisuke Koyama, D. Koyama, 2003 .

Mathematical Analysis of the DtN Finite Element Method for the Exterior Helmholtz Problem

D. Koyama, 2000 .

Evaluation of measurement accuracy of piezoelectric particle sizer using resonance flexural vibration modes of circular disc

M. Matsukawa, D. Koyama, Masaya Saeki, 2020, Acoustical Science and Technology.

Piezoelectric particle sizer for measuring bed load using a combination of resonance vibration modes

M. Matsukawa, D. Koyama, M. Hayashi, 2017 .

Control of the surface profile of powder using the flexural vibration of a V-shaped plate.

M. Matsukawa, D. Koyama, Reina Kobayashi, 2022, Ultrasonics.

On‐chip ultrasonic manipulation of microparticles by using the flexural vibration of a glass substrate

M. Matsukawa, D. Koyama, Ryota Yamamoto, 2017, Ultrasonics.

Two-dimensional noncontact transportation of small objects in air using flexural vibration of a plate

Daisuke Koyama, Mami Matsukawa, Ryota Kashima, 2015, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.

Noncontact Ultrasonic Transport of Liquid Using a Flexural Vibration Plate

Daisuke Koyama, Kentaro Nakamura, Mingjie Ding, 2012 .

An ultrasonic air pump using an acoustic traveling wave along a small air gap

K. Nakamura, D. Koyama, Y. Wada, 2010, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

An ultrasonically levitated noncontact stage using traveling vibrations on precision ceramic guide rails

T. Ide, K. Nakamura, D. Koyama, 2007, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

Power-law dependence describing subharmonic generation from a non-spherically oscillating bubble

D. Koyama, Kenji Yoshida, Yoshiaki Watanabe, 2015 .

High-speed focusing of a liquid microlens using acoustic radiation force

Kentaro Nakamura, Daisuke Koyama, Ryoichi Isago, 2011, International Conference on Optical Fibre Sensors.

A Parallel Schwarz Method for Multiple Scattering Problems

D. Koyama, 2011 .

Anisotropic Longitudinal Wave Propagation in Swine Skull

M. Matsukawa, D. Koyama, I. Michimoto, 2020, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.

Koyama, D., & Orr-Ewing, A. J. (2016). Photochemical reaction dynamics of 2,2'-dithiobis(benzothiazole): direct observation of the addition product of an aromatic thiyl radical to an alkene with time-resolved vibrational and electronic absorption spectroscopy. Physical Chemistry Chemical Physics, 18

D. Koyama, A. Orr-Ewing, 2016 .

Reaction Dynamics of CN Radicals in Acetonitrile Solutions.

G. M. Greetham, I. Clark, D. Koyama, 2015, The journal of physical chemistry. A.

Quantitative evaluation of hemolysis in bovine red blood cells caused by acoustic cavitation under pulsed ultrasound

D. Koyama, Yoshiaki Watanabe, Kentaro Tani, 2017 .

Quantitative estimation of phospholipid molecules desorbed from a microbubble surface under ultrasound irradiation

D. Koyama, M. Krafft, Reina Kobayashi, 2023, Scientific reports.

Multiple-frequency ultrasonic imaging by transmitting pulsed waves of two frequencies

Akihisa Ohya, Daisuke Koyama, Iwaki Akiyama, 2009, Journal of Medical Ultrasonics.

Study on the Wave Equation with an Artificial Boundary Condition

D. Koyama, 2000 .

Effect of anisotropy on stress-induced electrical potentials in bovine bone using ultrasound irradiation

M. Matsukawa, D. Koyama, T. Yanagitani, 2017 .

On-chip ultrasonic manipulation of micro-particles using flexural vibration of a glass substrate

M. Matsukawa, D. Koyama, Ryota Yamamoto, 2015, 2015 IEEE International Ultrasonics Symposium (IUS).

Fabrication of an optical lens array using ultraviolet light and ultrasonication.

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2015, Ultrasonics.

Fablication method of an optical lens arrray using ultraviolet light and ultrasound vibration

Kentaro Nakamura, M. Matsukawa, D. Koyama, 2014, 2014 IEEE International Ultrasonics Symposium.

Noncontact ultrasonic particle manipulation in a circular trajectory using a vibrating disc

Kentaro Nakamura, D. Koyama, Yu Ito, 2010 .

Dependence of Brillouin Frequency Shift on Temperature and Strain in Poly(methyl methacrylate)-Based Polymer Optical Fibers Estimated by Acoustic Velocity Measurement

Yosuke Mizuno, Daisuke Koyama, Neisei Hayashi, 2012 .

Measurement of Acoustic Velocity in Poly(methyl methacrylate)-Based Polymer Optical Fiber for Brillouin Frequency Shift Estimation

Yosuke Mizuno, Daisuke Koyama, Neisei Hayashi, 2011 .