A5088432056- Atomic and Subatomic Physics Research
- Robotic Path Planning Algorithms
- Dynamics and Control of Mechanical Systems
- Control and Dynamics of Mobile Robots
- Quantum, superfluid, helium dynamics
- Robotic Locomotion and Control
- Robotics and Sensor-Based Localization
- Physics of Superconductivity and Magnetism
- Magnetic properties of thin films
- Advanced NMR Techniques and Applications
- Modular Robots and Swarm Intelligence
- Magnetic confinement fusion research
- Plasmonic and Surface Plasmon Research
- Nuclear physics research studies
- Robot Manipulation and Learning
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Manufacturing and Logistics Optimization
- Evacuation and Crowd Dynamics
- EEG and Brain-Computer Interfaces
- Robotic Mechanisms and Dynamics
- Soft Robotics and Applications
- Particle accelerators and beam dynamics
- Neuroscience and Neural Engineering
- Crystallization and Solubility Studies
- Advanced Electron Microscopy Techniques and Applications
Tohoku University
2015-2024
Reitaku University
2023-2024
Osaka University
2003-2023
Sysmex (Japan)
2023
Toto (Japan)
2021
Kagoshima University
2019-2021
Meijo University
2012-2020
Tokyo Institute of Technology
2006-2020
Tsinghua University
2020
State Key Laboratory of New Ceramics and Fine Processing
2020
The current-induced effective field in perpendicularly magnetized Ta/CoFeB/MgO wire was investigated. A threshold decrease of 6.4 kOe/mA observed by measuring the Hall resistance versus magnetic curve with various bias currents. probably caused in-plane field, mainly due to Rashba effect. smaller and opposite direction compared that Pt/Co/AlOx previously reported.
The nonlinear motion of underactuated mechanisms has drawn recent interests researchers. Underactuated mechanical systems are often subject to so-called nonholonomic constraints which related many both theoretical and practical issues. We first analyze the behavior a two-joint planar manipulator with second joint free, from dynamics point view. then discuss simultaneous positioning joints. use time-periodic input propose an amplitude modulation feedback error. analysis via Poincare map shows...
A Hyper-Flexible Manipulator (HFM, for short) is a kind of continuum robots with simple mechanical structure like cable, rope and string, which are useful tools utilized everywhere in various forms. In this paper, order to achieve dexterous manipulation by type robot, we discuss kinematics dynamics an HFM. We rigorously derive spatial, nonlinear model underactuated mechanism using special based on curve geometry theory robot manipulation.
path planning. The higher layei generates a trajectory from the current position to goal. 'The lower layer controls servo driver follow generated while avriidinp, obstaclcs. This laycr is composcd of thrce modules called watchdog, 'navigator*. and deadlock solver. local equilibrium detected by watchdog canceled relationship among members discussed
We developed a split-illumination electron holography that uses an biprism in the illuminating system and two biprisms (applicable to one biprism) imaging system, enabling holographic interference micrographs of regions far from sample edge be obtained. Using condenser biprism, we split wave into coherent waves: is illuminate observation area plane other pass through vacuum space outside sample. The has potential greatly expand breadth applications holography.
A 100-nm-thick L21-ordered full-Heusler Co2FeSi (CFS) alloy film was fabricated using the facing targets sputtering (FTS) method at a substrate temperature TS of 300 °C. The degrees L21- and B2-order for were 37% 96%, respectively. In addition, CFS thin films with perpendicular magnetic anisotropy (PMA) induced by MgO-interfaces also successfully FTS method. CFS/MgO stacked layers exhibited PMA when layer had thickness 0.6 nm ≤ dCFS 1.0 nm. in these structures resulted from interfacial anisotropy.
A bearingless induction machine has combined characteristics of an motor and magnetic bearings. It is known that the suspension rotor becomes unstable at overload operation, particularly in transient conditions. novel air-gap-flux-oriented vector control scheme been proposed to operate during high torque acceleration period. found there optimal flux orientation for complete decoupling radial force generation. Test results a laboratory validates performance efficacy controller
Abstract Two kinds of bioreactors, a bubble‐column and an air‐lift bioreactor, have been designed. The influence operating conditions such as medium composition, light intensity, carbon dioxide concentration in the flushing gas, culture temperature, gas flow rate, on photosynthesis Dunaliella tertiolecta were studied using chemometrics approach. bioreactor system was shown to be advantageous over air‐life because weaker intensity hydrodynamic stress derived from bubble dispersion broth...
Nonholonomic system is now one of the major topics in robotics. In this paper, we discuss nonlinear behavior a two-joint planer manipulator with second joint free for time-periodic inputs. First, illustrate that when amplitude remains small, Poincare map follows an ellipse-like closed path and it becomes chaotic large amplitude. We then propose control method to position both joints via modulation error. The effectiveness robustness are verified by experiments.
Angle-resolved measurements on a cathodoluminescence (CL) detection system equipped with 200 keV transmission electron microscope were performed 1-dimensional silver grating. The dispersion curves of surface plasmon polaritons (SPPs) the grating derived from angle-resolved CL spectra, and patterns SPP standing waves at plasmonic band edge directly observed.
Three dimension (3D) point cloud data in fog-filled environments were measured using light detection and ranging (LIDAR). Disaster response robots cannot easily navigate through such because this contain false distance errors caused by fog. We propose a method for recognizing removing fog based on 3D features correction reducing measurement errors. Laser intensity geometrical are used to recognize data. However, these not sufficient measure with 6 2 m visibility, as misjudgments occur. To...
The firefighting robot system (FFRS) comprises several autonomous robots that can be deployed to fire disasters in petrochemical complexes. For navigation, the path planner should consider constraints and characteristics. Specifically, three requirements satisfied for a suitable FFRS. First, must satisfy maximum curvature constraint. Second, it smooth easily execute trajectory. Third, allow reaching target location specific heading. We propose provides paths, constraint, allows smoother is...
In this paper, a three-dimensional dynamics model of hyper-flexible manipulator like string is derived based on slice the arm, which regarded as rigid link with an infinitesimal width serial chain manipulator. We show in three forms familiar theory robot control: Newton-Euler, Lagrange and regressor representations.
Abstract Light emission by surface plasmons induced high‐energy electron beams was investigated for several nanostructures, i.e. two touching particles of silver, a silver whisker and stripes on flat metal surface. The spectra showed that the resonant peaks originated from modes plasmons. Monochromatic photon maps taken at peak wavelengths clearly revealed spatial distribution nanostructures. Copyright © 2006 John Wiley & Sons, Ltd.
A focused electron beam in a transmission microscope can excite surface plasmon polariton (SPP) at any position on metal as point source. The excited SPP is converted into light step and the emission intensity depends position, photon energy, angle. spectrum image was obtained by scanning across silver with fixed angle, demonstrating characteristic fringe pattern. dispersion relation of derived analyzing image.
The objective of this study was to achieve simultaneous localization and mapping (SLAM) firefighter robots for petrochemical complexes. Consistency the SLAM map is important because human operators compare with aerial images identify target positions on map. global positioning system (GPS) enables increased consistency. Therefore, paper describes two Rao-Blackwellized particle filters (RBPFs) based GPS light detection ranging (LIDAR) as solutions. Fast-SLAM 1.0 2.0 were used in grid maps...
This paper proposes Evolutionary Multi-objective Optimization (EMO)-based Adversarial Example (AE) design method that performs under black-box setting. Previous gradient-based methods produce AEs by changing all pixels of a target image, while previous EC-based changes small number to AEs. Thanks EMO's property population based-search, the proposed produces various types involving ones locating between generated two approaches, which helps know characteristics model or unknown attack...
Anti-microbial resistance (AMR) is one of the greatest threats to global health. The continual battle between emergence AMR and development drugs will be extremely difficult stop as long traditional anti-biotic approaches are taken. In order overcome this impasse, we here focused on type III secretion system (T3SS), which highly conserved in many Gram-negative pathogenic bacteria. T3SS known indispensable establishing disease processes but not essential for pathogen survival. Therefore,...
Despite evacuation on foot being recommended by authorities, in practice is assumed to include and car, as a certain amount of car be expected. We developed tsunami training application operating smartphones tablets, simulator evaluate the effect this application. then conducted an experiment Nishio City found that subjects were able quickly grasp attention targets present near them but had difficulty grasping far away. This suggests participants need trained repeatedly distant objects...