Results 31 to 40 of about 2,417,705 (385)

Analysis and Correction of the Rolling Shutter Effect for a Star Tracker Based on Particle Swarm Optimization

open access: yesRemote Sensing, 2022
The rolling shutter effect decreases the accuracy of the attitude measurement of star trackers when they work in rolling shutter exposure mode, especially under dynamic conditions.
Zongqiang Fu   +6 more
doaj   +1 more source

Attitude control of on-orbit capture spacecraft with angular velocity constraint

open access: yesXibei Gongye Daxue Xuebao, 2022
Aiming at the attitude control problem of spacecraft in the capturing non-cooperative target process, a dual tracking robust adaptive attitude controller is designed. Firstly, a bounded virtual angular velocity is designed for the kinematics equations to
XU Lin   +3 more
doaj   +1 more source

Rotating Fluids with Self-Gravitation in Bounded Domains [PDF]

open access: yes, 2004
In this paper, we study the steady solutions of Euler-Poisson equations in bounded domains with prescribed angular velocity. This models a rotating Newtonian star consisting of a compressible perfect fluid with given equation of state $P=e^S\rho^{\gamma}$
Luo, Tao, Smoller, Joel
core   +2 more sources

AMRTA-X: Grasp Kinematic Analysis during Myoelectric Prehension Orthosis and Body Powered Prehension Orthosis's Usage on Brachial Plexus Injury Patients

open access: yesFolia Medica Indonesiana, 2021
Brachial Plexus Injury (BPI) results in decreased motor function in upper extremity and leads to reduced hand grasping movement. Orthotic prehension is designed to create artificial grasp movements in paralyzed hand.
Khrisna Adi Pinardi Fundhi
doaj   +1 more source

Defining the Consistent Velocity of Omnidirectional Mobile Platforms

open access: yesMachines
The maximum linear (or translational) velocity achievable by an omnidirectional platform is not uniform as it depends on the angular orientation of the motion.
Elena Rubies, Jordi Palacín
doaj   +1 more source

Entropy in the Kerr-Newman Black Hole [PDF]

open access: yes, 1997
Entropy of the Kerr-Newman black hole is calculated via the brick wall method with maintaining careful attention to the contribution of superradiant scalar modes.
Ho, Jeongwon   +3 more
core   +2 more sources

Absent Arm Swing and Dual Tasking Decreases Trunk Postural Control and Dynamic Balance in People With Parkinson's Disease

open access: yesFrontiers in Neurology, 2020
Introduction: Falling during walking is a common occurrence in people with Parkinson's disease and is closely associated with severe social and medical consequences.
Tarique Siragy, Julie Nantel
doaj   +1 more source

Differential rotation and angular momentum [PDF]

open access: yes, 2007
Differential rotation not only occurs in astrophysical plasmas like accretion disks, it is also measured in laboratory plasmas as manifested in the toroidal rotation of tokamak plasmas.
E. A. Evangelidis   +3 more
core   +1 more source

Utilization of Inertial Measurement Units for Determining the Sequential Chain of Baseball Strike Posture

open access: yesSensors, 2021
The purpose of this study was to employ inertial measurement units (IMU) with an eye-tracking device to investigate different swing strategies between two levels of batters.
Yun-Ju Lee   +4 more
doaj   +1 more source

Riemann's theorem for quantum tilted rotors

open access: yes, 1992
The angular momentum, angular velocity, Kelvin circulation, and vortex velocity vectors of a quantum Riemann rotor are proven to be either (1) aligned with a principal axis or (2) lie in a principal plane of the inertia ellipsoid. In the second case, the
A. Klein   +26 more
core   +2 more sources

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