Results 21 to 30 of about 15,926 (267)

Dual Control for Jerk-Driven Robotics in Rehabilitative Planar Applications

open access: yesMicromachines, 2020
This study compares a set of strategies to plan and control the trajectory of a robotic device in a planar workspace. These strategies are based on an affective application of jerk-laws able to indicate undesirable conditions (e.g., vibrations ...
Francesco Aggogeri   +2 more
doaj   +1 more source

Bifurcation Analysis, Synchronization and FPGA Implementation of a New 3-D Jerk System with a Stable Equilibrium

open access: yesMathematics, 2023
This research paper addresses the modelling of a new 3-D chaotic jerk system with a stable equilibrium. Such chaotic systems are known to exhibit hidden attractors.
Sundarapandian Vaidyanathan   +7 more
doaj   +1 more source

Variability of time series barbell kinematics in elite male weightlifters

open access: yesFrontiers in Sports and Active Living, 2023
IntroductionBarbell kinematics are an essential aspect of assessing weightlifting performance. This study aimed at analyzing the total variability of time series barbell kinematics during repeated lifts in the snatch and the clean and jerk at submaximal ...
Ingo Sandau, Georg Langen, Nico Nitzsche
doaj   +1 more source

Jerk in Earthquake Engineering: State-of-the-Art

open access: yesBuildings, 2022
The time derivative of acceleration, termed jerk, represents a physical property reflected through a sudden change of acceleration, and is expressed in m/s3. Since jerk is felt by humans, it has been widely used as a common (dis)comfort parameter.
Vladimir Vukobratović, Sergio Ruggieri
doaj   +1 more source

The study of geomagnetic jerk from 2010 to 2021 based on hourly mean data from global geomagnetic observatories

open access: yesEarth and Planetary Physics, 2023
The secular variation in the global geomagnetic field was analyzed in terms of the annual differences in monthly means by using the hourly mean data from 18 foreign (outside China) observatories of the World Data Center (WDC) for Geomagnetism from ...
YiJun Li   +5 more
doaj   +1 more source

Skip-glide target tracking based on improved Jerk model [PDF]

open access: yesZhihui kongzhi yu fangzhen, 2023
Aiming at the problem of tracking skip-glide targets using radar, this paper proposes an Unscented Kalman Filter (UKF) tracking algorithm based on the improved Jerk model.
ZHANG Xuesong, WU Nan, WANG Feng, TONG Lihua
doaj   +1 more source

THE TENDON-JERK AND MUSCLE-JERK IN DISEASE, AND ESPECIALLY IN POSTERIOR SCLEROSIS1 [PDF]

open access: yesThe American Journal of the Medical Sciences, 1886
n ...
Mitchell, S. Weir, Morris, J. Lewis
openaire   +1 more source

To the feature of physical development, physical and technical preparedness of masters weightlifters of different groups of gravimetric categories. [PDF]

open access: yesPedagogìka, Psihologìâ ta Mediko-bìologìčnì Problemi Fìzičnogo Vihovannâ ì Sportu, 2012
Comparison of indexes of preparedness of masters weightlifters which conduct preparation to championship of the world and Europa is resulted. 150 sportsmen took part in investigational. Age of sportsmen are 35 - 80 years.
Oleshko V.G.   +3 more
doaj  

Level of dynamic efforts weightlifters make in competitive exercises [PDF]

open access: yesPedagogìka, Psihologìâ ta Mediko-bìologìčnì Problemi Fìzičnogo Vihovannâ ì Sportu, 2012
The level of dynamic efforts of weightlifters of high qualification is investigational in the structure of technique of getting up of barbell in a jerk and first reception of shove.
Oleshko V.G.
doaj   +1 more source

Calculating and Analyzing Angular Head Jerk in Augmented and Virtual Reality: Effect of AR Cue Design on Angular Jerk

open access: yesApplied Sciences, 2021
In this work, we propose a convenient method for evaluating levels of angular jerk in augmented reality (AR) and virtual reality (VR). Jerk is a rarely analyzed metric in usability studies, although it can be measured and calculated easily with most head-
Jared Van Dam   +3 more
doaj   +1 more source

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