Results 11 to 20 of about 119,816 (348)

Is OJ 287 a Single Supermassive Black Hole?

open access: yesUniverse, 2020
Light curves for more than century optical photometric observations of the blazar OJ 287 reveals strong flares with a quasi-period of about 12 years. For a long time, this period has been interpreted by processes in a binary black hole system. We propose
Marina S. Butuzova   +1 more
doaj   +1 more source

Prograde and retrograde precession of a fluid-filled cylinder

open access: yesNew Journal of Physics, 2021
We numerically study precession driven flows in a cylindrical container whose nutation angle varies between 60 and 90 degrees for prograde and retrograde precession.
Federico Pizzi   +3 more
doaj   +1 more source

INFLUENCE OF CONTROL CURRENT WAVEFORM ON ROTOR NUTATION OF THREE-DEGREES-OF-FREEDOM ELECTRIC MACHINE

open access: yesТехнічна електродинаміка, 2023
The design of the electric machine with three degrees of freedom of the rotor with an external magnetic core, containing permanent magnets, and an internal magnetic core is considered. The both magnetic cores are rotating.
І.С. Пєтухов   +3 more
doaj   +1 more source

Precession optomechanics

open access: yesOptics Express, 2011
8 pages, 5 ...
Zhang, Xingyu   +2 more
openaire   +3 more sources

Precession Intuitively Explained

open access: yesFrontiers in Physics, 2019
Formal explanations of the dynamics of free and heavy tops are considered to be known for centuries. However, intuitive understanding of their unexpected behavior is still a challenge.
Péter Hantz, Zsolt I. Lázár
doaj   +1 more source

Long-period nutational-precessional motions of the instantaneous Earth rotation pole

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2020
The influence of the rotational regime on real long-period nutational-precessional motions of the instantaneous pole of the Earth’s rotation is considered. The solar magnetospheric (through changes in the angular velocity of rotation) mechanism of action
V.Yu. Belashov   +2 more
doaj   +1 more source

Effect of the Grip Angle on Off-Spin Bowling Performance Parameters, Analysed with a Smart Cricket Ball

open access: yesProceedings, 2018
In the off-spin bowling grip, the ball is clamped between index and middle fingers. Spin bowlers attempt to select a spread angle between these two fingers that achieves comfort and optimises performance.
Franz Konstantin Fuss   +2 more
doaj   +1 more source

Mobile Computing with a Smart Cricket Ball: Discovery of Novel Performance Parameters and Their Practical Application to Performance Analysis, Advanced Profiling, Talent Identification and Training Interventions of Spin Bowlers

open access: yesSensors, 2021
Introduction: Profiling of cricket bowlers is performed with motion analyses systems that require the placement of markers on the bowler’s body and on the ball.
Franz Konstantin Fuss   +2 more
doaj   +1 more source

The precession of eccentric discs in close binaries [PDF]

open access: yes, 1999
We consider the precession rates of eccentric discs in close binaries, and compare theoretical predictions with the results of numerical disc simulations and with observed superhump periods.
Murray, James R.
core   +2 more sources

Numerical Relativity Simulations of Precessing Binary Neutron Star Mergers [PDF]

open access: yes, 2017
We present the first set of numerical relativity simulations of binary neutron mergers that include spin precession effects and are evolved with multiple resolutions.
Bernuzzi, Sebastiano   +4 more
core   +2 more sources

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