Results 21 to 30 of about 197,944 (293)

Bouncing cosmologies

open access: yesPhysics Reports, 2008
Please send comments to novello@cbpf.br with copy to sepbergliaffa@gmail ...
Novello, M., Bergliaffa, S. E. Perez
openaire   +2 more sources

Investigation into the Trampoline Dynamic Characteristics and Analysis of Double Bounce Vibrations

open access: yesSensors, 2022
Double bounce is an unusual and potentially very hazardous phenomenon that most trampoline users may have experienced, yet few would have really understood how and why it occurs.
David Eager   +5 more
doaj   +1 more source

Viscous bouncing

open access: yesSoft Matter, 2020
Repellent materials are known for their ability to make impacting water recoil and takeoff, which keeps them dry after rain.
Jha, Aditya   +3 more
openaire   +3 more sources

The Effect of the Width of an Aluminum Plate on a Bouncing Steel Ball [PDF]

open access: yesInternational Scholastic Journal of Science, 2013
The effect of the distance between clamping supports of an aluminum alloy plate on the coefficient of restitution of a bouncing steel ball was investigated. The plate was supported on two wooden blocks with a meter stick secured on either side.
Christine Hathaway, Hanh Nguyen
doaj   +1 more source

Finite element modelling and experimental study of oblique soccer ball bounce [PDF]

open access: yes, 2011
In this study, we develop a finite element model to examine the oblique soccer ball bounce. A careful simulation of the interaction between the ball membrane and air pressure in the ball makes the model more realistic than analytical models, and helps us
Degrieck, Joris   +3 more
core   +1 more source

K-bounce

open access: yesJournal of Cosmology and Astroparticle Physics, 2007
By demanding that a bounce is nonsingular and that perturbations are well-behaved at all times, we narrow the scope of possible models with one degree of freedom that can describe a bounce in the absence of spatial curvature. We compute the general properties of the transfer matrix of perturbations through the bounce, and show that spectral distortions
Abramo, L. Raul, Peter, Patrick
openaire   +2 more sources

Bouncing branes [PDF]

open access: yesPhysics Letters B, 2002
Two classical scalar fields are minimally coupled to gravity in the Kachru-Shulz-Silverstein scenario with a rolling fifth radius. A Tolman wormhole solution is found for a R x S^3 brane with Lorentz metric and for a R x AdS_3 brane with positive definite metric.
openaire   +4 more sources

Spectrum of Cuscuton bounce [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2021
Abstract It has been recently shown that a cosmological bounce model based on Cuscuton gravity does not have any ghosts or curvature instabilities. We explore whether Cuscuton bounce can provide an alternative to inflation for generating near scale-invariant scalar perturbations.
Kim, J. Leo, Geshnizjani, Ghazal
openaire   +2 more sources

Spin Rate of a Racquetball Due To Angular Impact [PDF]

open access: yesJournal of Science International School Bangkok, 2014
The relationship between the impact angle of a racquetball and the resulting angular velocity of the ball was investigated. Impact angles ranging from 0° to 80° were tested.
Dolev Illouz
doaj  

Bouncing braneworlds

open access: yesPhysics Letters B, 2003
9 pages, 1 figure, revtex, accepted for publication in Phys.
Shtanov, Yuri, Sahni, Varun
openaire   +3 more sources

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