Results 51 to 60 of about 2,417,705 (385)

A Biomechanical Evaluation of the Upper Limb Kinematic Parameters of the Throwing Action in Handball: A Case Study

open access: yesApplied Sciences
Handball is a team sport that involves fourteen players who are attempting to score more goals than their opponent within two thirty-minute halves.
Mihnea Ion Marin   +4 more
doaj   +1 more source

Speed control device for a heavy duty shaft [PDF]

open access: yes, 1980
A speed control device is characterized by a reference speed shaft spatially related to a heavy duty shaft, a drive train for driving the reference speed shaft at a constant angular velocity, a drive train for driving the heavy duty shaft at a variable ...
Ford, A. G.
core   +1 more source

Axially symmetric rotating traversable wormholes

open access: yes, 2004
This paper generalizes the static and spherically symmetric traversable wormhole geometry to a rotating axially symmetric one with a time-dependent angular velocity by means of an exact solution.
A. DeBenedictis   +17 more
core   +2 more sources

Pulse Pressure, White Matter Hyperintensities, and Cognition: Mediating Effects Across the Adult Lifespan

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives To investigate whether pulse pressure or mean arterial pressure mediates the relationship between age and white matter hyperintensity load and to examine the mediating effect of white matter hyperintensities on cognition. Methods Demographic information, blood pressure, current medication lists, and Montreal Cognitive Assessment ...
Jade Hannan   +8 more
wiley   +1 more source

Method for Predicting the Liquid-Sloshing Characteristics of a Microsatellite Propulsion System

open access: yesInternational Journal of Aerospace Engineering, 2019
In this study, a method for establishing a prediction model for the liquid-sloshing characteristics of microsatellite propulsion systems is proposed. The ideal states of the liquid-sloshing characteristics are considered for the following three models ...
L. Teng, T. Meng, Zh. H. Jin
doaj   +1 more source

On the Distribution of Angular Velocity in the Sun [PDF]

open access: yesSymposium - International Astronomical Union, 1976
The angular velocity distribution as a function of heliographic latitude is directly observed at the solar surface. Also the dependence of the angular velocity on the distance from the solar centre can be studied observationally for the outermost layers of the Sun. But within the Sun the study of angular velocity depends very much on assumptions.
openaire   +2 more sources

Cervical Spinal Cord Magnetization Transfer Ratio and Its Relationship With Clinical Outcomes in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective The cervical spinal cord (cSC) is highly relevant to clinical dysfunction in multiple sclerosis (MS) but remains understudied using quantitative magnetic resonance imaging (MRI). We assessed magnetization transfer ratio (MTR), a semi‐quantitative MRI measure sensitive to MS‐related tissue microstructural changes, in the cSC and its ...
Lisa Eunyoung Lee   +26 more
wiley   +1 more source

GNSS gyroscopes: determination of angular velocity and acceleration with very high-rate GNSS

open access: yesSatellite Navigation
Although global navigation satellite systems (GNSS) have been routinely applied to determine attitudes, there exists no literature on determining angular velocity and/or angular acceleration from GNSS.
Yun Shi   +3 more
doaj   +1 more source

Spin Angular Momentum of Proton Spin Puzzle in Complex Octonion Spaces

open access: yes, 2017
The paper focuses on considering some special precessional motions as the spin motions, separating the octonion angular momentum of a proton into six components, elucidating the proton angular momentum in the proton spin puzzle, especially the proton ...
Weng, Zi-Hua
core   +1 more source

Data‐driven forecasting of ship motions in waves using machine learning and dynamic mode decomposition

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
Summary Data‐driven forecasting of ship motions in waves is investigated through feedforward and recurrent neural networks as well as dynamic mode decomposition. The goal is to predict future ship motion variables based on past data collected on the field, using equation‐free approaches.
Matteo Diez   +2 more
wiley   +1 more source

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