Takuya Kato

ORCID: 0000-0001-7952-4752
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About
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Research Areas
  • Face recognition and analysis
  • Sports injuries and prevention
  • Human Motion and Animation
  • Generative Adversarial Networks and Image Synthesis
  • Radiation Detection and Scintillator Technologies
  • Medical Imaging Techniques and Applications
  • Lower Extremity Biomechanics and Pathologies
  • 3D Shape Modeling and Analysis
  • Muscle activation and electromyography studies
  • Synthetic Organic Chemistry Methods
  • Video Analysis and Summarization
  • Asymmetric Synthesis and Catalysis
  • Artificial Immune Systems Applications
  • Shoulder Injury and Treatment
  • Magnetic and Electromagnetic Effects
  • Transcranial Magnetic Stimulation Studies
  • Computer Graphics and Visualization Techniques
  • Oxidative Organic Chemistry Reactions
  • Superconducting Materials and Applications
  • Advanced X-ray and CT Imaging
  • Particle accelerators and beam dynamics
  • Particle Accelerators and Free-Electron Lasers
  • Advanced Vision and Imaging
  • Geological and Geochemical Analysis
  • Microbial Natural Products and Biosynthesis

National Cancer Institute
2025

Center for Cancer Research
2025

Okayama University
2011-2024

Sapporo Medical University
2020-2023

Japan Society for the Promotion of Science
2020-2022

The University of Tokyo
2004-2021

University of Tsukuba
2018-2021

KDDI Research (Japan)
2019-2021

Waseda University
2011-2020

Obihiro National Hospital
2018-2019

We are proposing a novel design for module with depth of interaction (DOI) capability gamma rays by measuring the pulse-height ratio double-sided Multi-Pixel Photon Counters (MPPCs) coupled at both ends scintillation crystal block. Thanks to newly developed monolithic MPPC arrays consisting 4 × channels three-side buttable package, is very thin and compact, thereby enabling less dead space between each when arranged into fully designed gantry. To demonstrate our concept DOI technique, we...

10.1109/tns.2012.2233215 article EN IEEE Transactions on Nuclear Science 2013-01-30

Pretraining large language models (LLMs) is resource-intensive, often requiring months of training time even with high-end GPU clusters. There are two approaches mitigating such computational demands: reusing smaller to train larger ones (upcycling), and computationally efficient like mixture-of-experts (MoE). In this paper, we study the upcycling LLMs MoE models, which scaling behavior remains underexplored. Through extensive experiments, identify empirical laws that describe how...

10.48550/arxiv.2502.03009 preprint EN arXiv (Cornell University) 2025-02-05

The Kobayashi aldol reaction is one of the most powerful methods to synthesize polyketide skeleton and has been applied total synthesis natural products. This methodology used construct anti-aldol products, only a few precedents on syn-selective are known. A by using E,E-vinylketene silyl N,O-acetal an excess amount Lewis acid presented.

10.1021/ol3024677 article EN Organic Letters 2012-10-04

Assessing muscle flexibility and architecture is important for hamstring strain injury (HSI) prevention. We investigated the relationship between shear modulus passive force in muscles at different sites effect of on slope modulus-passive using wave elastography (SWE).

10.1007/s10396-023-01317-8 article EN cc-by Journal of Medical Ultrasonics 2023-05-11

Abstract The present study aims to assess the effect of hip flexion angle on shear modulus adductor longus (AL) muscle associated with passive abduction and rotation. Sixteen men participated in study. For task, angles used were − 20, 0, 40, 60, 80°, 10, 30, 40°. rotation 0 40°, 20° internal rotation, 0° external at extension was significantly higher than that 80° for 30 40° (i.e., P < 0.05). regardless mechanical stress AL extended position. Furthermore, could increase only hip-extended

10.1038/s41598-023-36698-w article EN cc-by Scientific Reports 2023-06-12

We found earliest Triassic (Griesbachian) conodont, Hindeodus parvus, from the basal part of black carbonaceous claystone Ubara Permian/Triassic boundary section in Tamba Belt. also obtained Late Permian (Changxingian) conodonts underlying gray siliceous as already reported other P/T sections. The lithologic between and is confirmed to be deep-sea sedimentary rocks.

10.5575/geosoc.105.895 article EN The Journal of the Geological Society of Japan 1999-01-01

Stereoselective total synthesis of tabtoxinine-β-lactam has been achieved. The vinylogous Mukaiyama aldol reaction with vinylketene silyl N,O-acetal and α-keto-β-lactam proceeded to afford the adduct possessing a TβL-skeleton tert-alcohol in high yield stereoselectivity. introduction amino group accomplished by azidation at α position imide followed hydrogenolysis. A straightforward method achieve potent inhibitor glutamine synthetase, both α-hydroxy-β-lactam α-amino acid moieties, established.

10.1021/acs.orglett.7b00814 article EN Organic Letters 2017-05-04

Stereoselective synthesis of the C24–C40 segment aculeximycin has been achieved by using Kobayashi aldol reactions and epoxy-opening rearrangement reactions. The C33–C40 was synthesized reaction followed epoxidation Jung epoxide 9, while C25–C32 constructed 13. These segments were connected sequential dehydration, reduction, conversion ethyl ester to ketone give 1. All stereogenic centers substrate-controlled stereoselective

10.1021/acs.orglett.5b00965 article EN Organic Letters 2015-04-23

Repetitive transcranial magnetic stimulation (rTMS) is effective for treatment of several neurological and psychiatric diseases. We proposed an eccentric figure-eight coil, which induces strong eddy currents in the target brain tissue. In this study, numerical analyses were carried out to obtain field distribution coil current brain. The performed with various design parameters, such as outer inner diameters number turns, investigate influence these parameters on characteristics. Increases...

10.1063/1.3676426 article EN Journal of Applied Physics 2012-03-06

Numerous video have been translated using "dubbing," spurred by the recent growth of market. However, it is very difficult to achieve visual-audio synchronization. That say in general a new audio does not synchronize with actor's mouth motion. This discrepancy can disturb comprehension contents. There-fore many methods researched so far solve this problem.

10.1145/2945078.2945097 article EN 2016-07-08

The development of compact magnetic stimulators will enable us to treat some intractable neurological diseases at one's home. In this study, we propose eccentric spiral coils which induce sufficient eddy currents in the brain lower driving for stimulator circuit. Numerical simulations based on finite element method showed advantages proposed design. A prototype coil and circuit were fabricated. generated a field 1.41 T maximum output level stimulator.

10.1109/iembs.2011.6090559 article EN Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2011-08-01

We investigated the shear modulus-passive force relationship in hip adductor longus (AL) muscles of human cadavers and explored effect muscle architecture on elastic properties AL using wave elastography (SWE). Nine were harvested from a soft, embalmed cadaver. The affixed to custom-built device comprising two clamps, pulley, cable provide passive loads, which increased 0 600 g 60-g increments. modulus was measured proximal (Pro), middle (Mid), distal (Dis) regions. masses anatomical...

10.1002/ca.23881 article EN Clinical Anatomy 2022-04-08

We present Song2Face, a deep neural network capable of producing singing facial animation from an input voice and singer label. The architecture is built upon our insight that, although expression when varies between different individuals, voices store valuable information such as pitch, breathe, vibrato that expressions may be attributed to. Therefore, consists encoder extracts relevant vocal features audio, regression conditioned on label predicts control parameters for animation. In...

10.1145/3410700.3425435 article EN 2020-11-17

Dressing virtual characters is necessary for many applications such as film and game. However, modeling clothing a significant bottleneck, because it requires manual effort to design clothing, position correctly on the body, adjusting fitting. Therefore, even if we wish similar looking that have very different poses shapes, would need repeat tedious process practically from scratch. We then propose method automatic design-preserving transfer of between in various shapes. As shown results,...

10.1145/2668975.2668989 article EN 2014-11-24

We report on the development of two versatile, high spatial resolution gamma-ray imagers for medical imaging. One is a compact camera, other tweezers type coincidence imaging system. These applications consisting large-area monolithic Multi-Pixel Photon Counter (MPPC) and submilIimeter pixelized scintillator matrices. The MPPC array has 4 × channels with three-side buttable, very package. Each channel photosensitive area 3 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

10.1109/nssmic.2012.6551718 article EN 2012-10-01
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