Yasutaka Shimizu

ORCID: 0000-0003-3479-1149
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About
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Research Areas
  • Acoustic Wave Resonator Technologies
  • Probability and Risk Models
  • Stochastic processes and financial applications
  • Financial Risk and Volatility Modeling
  • Ultrasonics and Acoustic Wave Propagation
  • Insurance, Mortality, Demography, Risk Management
  • Advanced MEMS and NEMS Technologies
  • Advanced Fiber Optic Sensors
  • Mechanical and Optical Resonators
  • Electromagnetic Compatibility and Measurements
  • Statistical Methods and Inference
  • Stochastic processes and statistical mechanics
  • Education and Learning Interventions
  • Ferroelectric and Piezoelectric Materials
  • Gaze Tracking and Assistive Technology
  • Statistical Distribution Estimation and Applications
  • Advanced Antenna and Metasurface Technologies
  • Semiconductor Lasers and Optical Devices
  • Open Education and E-Learning
  • Microwave and Dielectric Measurement Techniques
  • Fluid Dynamics Simulations and Interactions
  • Image and Video Quality Assessment
  • Advanced Mathematical Modeling in Engineering
  • Educational Research and Pedagogy
  • Image Retrieval and Classification Techniques

Waseda University
2014-2024

Tokyo Institute of Technology
2000-2021

National Institute of Information and Communications Technology
2021

Japan Science and Technology Agency
2010-2017

Centre de Recherche en Économie et Statistique
2017

Centre for Research in Engineering Surface Technology
2017

Center for Responsible Travel
2017

Josai University
2017

Doshisha University
2017

Osaka University
2006-2016

10.1007/s11203-005-8114-x article EN Statistical Inference for Stochastic Processes 2006-07-10

Two types of leaky waves are obtained in this paper. They the first wave, whose phase velocity is between those slow and fast shear waves, second greater than that wave. The characteristics propagating on LiNbO 3 LiTaO substrates theoretically investigated by changing cut angles directions. Propagation loss wave for an electrically open surface becomes almost zero at φ=20, 40, 80, 100, 140 160° ( φ, 90°, 0°)-cut substrate, K 2 16.2% these cuts. Phase velocities (90°, ψ )-cut twice as...

10.1143/jjap.34.2664 article EN Japanese Journal of Applied Physics 1995-05-01

The oculo-motor re ects the viewer s ability to process visual information. This paper examines whether was affected by two factors: rstly task dif culty and secondly eye-movement frequency. In this paper, indices were de ned as measurements of pupil size, blink eye-movement. For purpose study, experiments designed based on previous subsequential ocular tasks subjects required solve a series mathematical problems orally report their calculations.The results experiment found that size rate...

10.1145/507072.507080 article EN 2002-01-01

Abstract A non-parametric estimator of the Gerber–Shiu function is proposed for a risk process with compound Poisson claim plus diffusion perturbation; Wiener–Poisson model. The based on regularized inversion an empirical-type Laplace transform function. We show weak consistency in sense integrated squared error rate convergence. Keywords: Risk model perturbed by diffusionsThe expected discounted penalty functionLaplace transformEmpirical estimatorRegularized Acknowledgements author...

10.1080/03461238.2010.523515 article EN Scandinavian Actuarial Journal 2010-11-27

10.1016/j.jmva.2013.01.012 article EN publisher-specific-oa Journal of Multivariate Analysis 2013-01-25

10.1016/j.spa.2016.08.006 article EN publisher-specific-oa Stochastic Processes and their Applications 2016-08-29

10.1007/s11203-005-8113-y article EN Statistical Inference for Stochastic Processes 2006-06-30

10.1016/j.insmatheco.2017.02.006 article EN Insurance Mathematics and Economics 2017-03-05

10.1016/j.insmatheco.2014.08.001 article EN publisher-specific-oa Insurance Mathematics and Economics 2014-08-19

This paper describes the influence of eye blinks on frequency analysis and power spectrum difference for task-evoked pupillography eye-movement during an experiment which consisted ocular following tasks oral calculation with three levels task difficulty: control, 1×1,and 1×2 digit calculation.The compensation model temporal pupil size based MLP (multi layer perceptron) was trained to detect a blink estimate by using blinkless pupillary change artificial patterns. The PSD (power density)...

10.1145/968363.968381 article EN 2004-01-01

10.1016/j.insmatheco.2008.10.002 article EN Insurance Mathematics and Economics 2008-10-28

10.3103/s1066530711020037 article EN Mathematical Methods of Statistics 2011-06-01

Complex values of the permittivity tensor robber sheets which are manufactured by rolling process were estimated least-squares method using reflection coefficient measured for normal incidence. First, frequency characteristics coefficients a rubber sheet backed thin aluminum from 8.5 to 10.5 GHz changing angle relative incident electric field. Next, elements determined many data samples. Five kinds containing carbon particles or fibers selected, and circular pieces 30 cm in diameter this...

10.1109/tmtt.1986.1133517 article EN IEEE Transactions on Microwave Theory and Techniques 1986-11-01

10.1016/j.insmatheco.2016.05.004 article EN Insurance Mathematics and Economics 2016-05-20

10.1541/ieejfms1990.110.3_167 article EN IEEJ Transactions on Fundamentals and Materials 1990-01-01

Texture analysis is important in 2D image classification, recognition, segmentation and detection. Although a significant amount of work has been done on data analysis, techniques for analyzing 3D volume such as solid textures have not investigated sufficiently. In this research, we extended the well-known Laws' texture energy approach to handle textures. our approach, kernels are convolved together generate three dimensional masks (3times3times3) while traditional approaches use (3times3)....

10.1109/ism.2006.13 article EN 2006-12-01

10.1007/s11009-012-9282-y article EN Methodology And Computing In Applied Probability 2012-03-27

Eye movement reflects a viewer's visual information process. This study examines whether eye-movement responds to the cognitive load. It is already known that pupil size and blink can use as an indicator of mental workload. Saccades are rapid eye movements turn fovea focusing target. For this process, saccade was extracted observe viewing

10.1145/355017.355043 article EN 2000-01-01

We study a nonparametric estimation of Lévy measures for multidimensional jump-diffusion models from some discrete observations. suppose that the jump term is driven by process with finite measure, is, compound Poisson process. construct kernel-estimator density under sampling scheme where terminal time tends to infinity and at same distance between observations zero fast enough, show L2-consistency optimal rate in MSE sense. First, we consider case are given continuously then compare it...

10.14490/jjss.36.37 article EN JOURNAL OF THE JAPAN STATISTICAL SOCIETY 2006-01-01

We report the following five results for SAW propagation characteristics on quartz. (1)New first-, second-, and third-order temperature coefficients of stiffnesses alphaquartz were obtained better agreement with experiments. (2)Sets maps are presented showing value velocity, electro-mechanical coupling constant, powerflow angle coefficient delay. (3)One methods to select optimum cut by these is explained. delay shown several new cuts smaller than ST cut, from theoretical

10.1109/ultsym.1980.197431 article EN 1980-01-01

10.1016/j.jmva.2008.10.006 article EN publisher-specific-oa Journal of Multivariate Analysis 2008-10-20

In the inference for jump-diffusion processes, we often need to get information of jump part and continuous separately from data. Although some asymptotic theories have been studied on this issue, a practical interest is finitely many discrete samples. paper propose numerical procedure construct filter judge whether or not occurred finite The includes discussion about validity procedure.

10.14490/jjss.38.391 article EN JOURNAL OF THE JAPAN STATISTICAL SOCIETY 2008-01-01
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