Results 111 to 120 of about 843,344 (369)

Study on the Kinematic Performances and Optimization for Three Types of Parallel Manipulators

Machines, 2016
The modelling, optimization issues and stiffness for several types of three degrees-of-freedom parallel robotic manipulators, i.e., 3-DOF pure translational, 3-DOF pure rotational and 3-DOF mixed motion types, are studied in this paper. First of all, the
Dan Zhang, Bin Wei
doaj   +1 more source

Geometries for Possible Kinematics

, 2010
The algebras for all possible Lorentzian and Euclidean kinematics with $\frak{so}(3)$ isotropy except static ones are re-classified. The geometries for algebras are presented by contraction approach.
Bin Zhou, C. G. Huang, C. G. Huang, ChaoGuang Huang, E. Inönü, G. Gibbons, H. Bacry, H. Y. Guo, H. Y. Guo, H. Y. Guo, H. Y. Guo, H. Y. Guo, I. M. Yaglom, J. G. Derome, M. A. F. Sanjuan, N. A. Umow, XiaoNing Wu, Yu Tian, Zhan Xu   +18 more
core   +1 more source

Lightweight and High‐Performance Ankle Braces Enabled by 3D Printed Metamaterial Liquid Crystal Polymer

Advanced Materials Technologies, EarlyView.
A flexible, lightweight ankle brace made from 3D‐printed liquid crystal polymer metamaterials offers targeted support without restricting movement. Programmable stiffness provides protection during risky motions. Biomechanical tests suggest performance comparable to commercial braces with reduced bulk, highlighting potential for broader orthotic ...
Cassi J. Henderson, Zehao Ji, Miaomiao Zou, Xijin Hua, Thomas Stone, Sebastian W. Pattinson   +5 more
wiley   +1 more source

Kinematics Analysis of Working Devices of Wheel Loader based on Homogeneous Coordinate Transformation

Jixie chuandong, 2015
The kinematics equation of working devices is established by using the homogeneous coordinate transformation,and this is a new way for studying kinematics and dynamics of the working device of loader.Firstly,the kinematics equation of working devices is ...
臧红彬, 陶俊杰, 张辉
doaj  

Co-coding of head and whisker movements by both VPM and POm thalamic neurons

Nature Communications
Rodents continuously move their heads and whiskers in a coordinated manner while perceiving objects through whisker-touch. Studies in head-fixed rodents showed that the ventroposterior medial (VPM) and posterior medial (POm) thalamic nuclei code for ...
Tess Baker Oram, Alon Tenzer, Inbar Saraf-Sinik, Ofer Yizhar, Ehud Ahissar   +4 more
doaj   +1 more source

Influence of functional electrical stimulation of the hamstrings on knee kinematics in stroke survivors walking with stiff knee gait

Journal of Rehabilitation Medicine, 2018
Objective: To explore whether functional electrical stimulation of the hamstrings results in improved knee kinematics in chronic stroke survivors walking with a stiff knee gait. Design: Quasi-experimental. Subjects: Sixteen adult
Martin J. B. Tenniglo, Jaap H. Buurke, Erik C. Prinsen, Anke I. R. Kottink, Anand V. Nene, Johan S. Rietman   +5 more
doaj   +1 more source

Analyzing the Use of Accelerometers as a Method of Early Diagnosis of Alterations in Balance in Elderly People: A Systematic Review

Sensors, 2019
Alterations of balance are a growing public health problem as they affect one in three adults over the age of 65, and one in two over the age of 80. Identifying the factors that affect postural stability is essential in designing specific interventions ...
Raquel Leirós-Rodríguez, Jose L. García-Soidán, Vicente Romo-Pérez   +2 more
doaj   +1 more source

Extreme Terahertz Nonlinearity of AlGaN/GaN‐Based Grating‐Gate Plasmonic Crystals

Advanced Optical Materials, EarlyView.
Plasmonic crystals based on grating‐gated 2D electron gas in AlGaN/GaN heterostructures provide a platform for strong light‐matter interaction. Pump‐probe experiments revealed strong terahertz nonlinearity leading to 45% increase in transmission at a fluence below 350 nJ cm−2.
Pavlo Sai, Vadym V. Korotyeyev, Dmytro B. But, Maksym Dub, Dmitriy Yavorskiy, Jerzy Łusakowski, Mateusz Słowikowski, Serhii Kukhtaruk, Yurii Liashchuk, Jeong Woo Han, Christoph Böttger, Alexej Pashkin, Stephan Winnerl, Wojciech Knap, Martin Mittendorff   +14 more
wiley   +1 more source

The bicycle and side volley kicks in soccer: a systematical review

Revista Brasileira de Futsal e Futebol, 2020
As an important indicator of success kick is the most studied action in soccer. In scientific researches there are related different types of kicks, two of it, are bicycle and volley kick.
Rafael Toshio Bagatin
doaj  

Identification of Cross-Country Skiing Movement Patterns Using Micro-Sensors

Sensors, 2012
This study investigated the potential of micro-sensors for use in the identification of the main movement patterns used in cross-country skiing. Data were collected from four elite international and four Australian athletes in Europe and in Australia ...
Dale Chapman, Colin Macintosh, Gordon Waddington, Judith Anson, Keith Lyons, Finn Marsland   +5 more
doaj   +1 more source