Results 21 to 30 of about 14,974 (268)

Mechanisms underlying the production of carapace vibrations and associated waterborne sounds in the American lobster, Homarus americanus [PDF]

open access: yes, 2005
American lobsters produce carapace vibrations, which also lead to waterborne acoustic signals, by simultaneously contracting the antagonistic remotor and promotor muscles located at the base of the second antenna.
Henninger, Heidi Pye   +1 more
core   +2 more sources

How whole-body vibration can help our COPD patients. Physiological changes at different vibration frequencies

open access: yesInternational Journal of Chronic Obstructive Pulmonary Disease, 2018
Evaluate cardiac, metabolic, and ventilatory changes during a training session with whole-body vibration training (WBVT) with 3 different frequencies in patients with chronic obstructive pulmonary disease (COPD).This was a prospective, interventional trial in outpatients with severe COPD.
Eulogio Pleguezuelos   +12 more
openaire   +5 more sources

Observing the evaporation transition in vibro-fluidized granular matter [PDF]

open access: yes, 2006
By shaking a sand box the grains on the top start to jump giving the picture of evaporating a sand bulk, and a gaseous transition starts at the surface granular matter (GM) bed.
Barrat A.   +6 more
core   +1 more source

Invited review: Effect of temperature on a granular pile

open access: yes, 2010
As a fragile construction, a granular pile is very sensitive to minute external perturbations. In particular, it is now well established that a granular assembly is sensitive to variations of temperature.
de Gennes   +3 more
core   +2 more sources

The effects of forcing and dissipation on phase transitions in thin granular layers

open access: yes, 2010
Recent experimental and computational studies of vibrated thin layers of identical spheres have shown transitions to ordered phases similar to those seen in equilibrium systems.
Lobkovsky, Alexander E.   +2 more
core   +1 more source

Unjamming a granular hopper by vibration [PDF]

open access: yes, 2009
We present an experimental study of the outflow of a hopper continuously vibrated by a piezoelectric device. Outpouring of grains can be achieved for apertures much below the usual jamming limit observed for non vibrated hoppers.
Clement, E.   +5 more
core   +2 more sources

Novel Experimentally Observed Phenomena in Soft Matter

open access: yes, 2013
Soft materials such as colloidal suspensions, polymer solutions and liquid crystals are constituted by mesoscopic entities held together by weak forces. Their mechanical moduli are several orders of magnitude lower than those of atomic solids.
Bandyopadhyay, Ranjini
core   +1 more source

Hysteresis and competition between disorder and crystallization in sheared and vibrated granular flow

open access: yes, 2004
Experiments on spherical particles in a 3D Couette cell vibrated from below and sheared from above show a hysteretic freezing/melting transition. Under sufficient vibration a crystallized state is observed, which can be melted by sufficient shear.
G. D. R. Midi   +3 more
core   +1 more source

Vortices in vibrated granular rods

open access: yes, 2003
We report the experimental observation of novel vortex patterns in vertically vibrated granular rods. Above a critical packing fraction, moving ordered domains of nearly vertical rods spontaneously form and coexist with horizontal rods.
A. Kudrolli   +16 more
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

open access: yesFEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo   +2 more
wiley   +1 more source

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