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Foucault pendulum properties of spherical oscillators
Publications associées (37)
Lorentz Force from a Current-Carrying Wire on a Charge in Motion under the Assumption of Neutrality in the Symmetrical Frame of Reference
Marcos Rubinstein, Antonio Sunjerga
It is commonly assumed that a wire conducting an electric current is neutral in the laboratory frame of reference (the rest frame of the lattice of positive ions). Some authors consider that the wire is neutral only in a symmetrical frame of reference, in ...
2018Segregation of large particles in dense granular flows suggests a granular Saffman effect
Christophe Ancey, Kasper van der Vaart
We report on the scaling between the lift force and the velocity lag experienced by a single particle of different size in a monodisperse dense granular chute flow. The similarity of this scaling to the Saffman lift force in (micro-) fluids, suggests an in ...
2018Automatic extraction of constraints in manipulation tasks for autonomy and interaction
Tasks routinely executed by humans involve sequences of actions performed with high dexterity and coordination. Fully specifying these actions such that a robot could replicate the task is often difficult. Furthermore the uncertainties introduced by the us ...
EPFL2018Heightened clinical utility of smartphone versus body-worn inertial system for shoulder function B-B score
Kamiar Aminian, Alain Farron, Brigitte Jolles-Haeberli, Cyntia Duc
The B-B Score is a straightforward kinematic shoulder function score including only two movements (hand to the Back + lift hand as to change a Bulb) that demonstrated sound measurement properties for patients for various shoulder pathologies. However, the ...
2017The relativistic foundations of synchrotron radiation
Special relativity (SR) determines the properties of synchrotron radiation, but the corresponding mechanisms are frequently misunderstood. Time dilation is often invoked among the causes, whereas its role would violate the principles of SR. Here it is show ...
International Union of Crystallography (IUCr)2017Electrical impedance tomography: Amplitudes of cardiac related impedance changes in the lung are highly position dependent
Background Electrical impedance tomography (EIT) is used on the thorax to measure impedance changes due to the presence of air and blood in the lung. This experimental study was performed to investigate the effect of posture on cardiac and respiratory rela ...
Public Library of Science2017Motion-based nearest vector metric for reference frame selection in the perception of motion
Michael Herzog, Aaron Michael Clarke
We investigated how the visual system selects a reference frame for the perception of motion. Two concentric arcs underwent circular motion around the center of the display, where observers fixated. The outer (target) arc's angular velocity profile was mod ...
Association for Research in Vision and Ophthalmology (ARVO)2016The effective reference frame in perceptual judgments of motion direction
The retinotopic projection of stimulus motion depends both on the motion of the stimulus and the movements of the observer. In this study, we aimed to quantify the contributions of endogenous (retinotopic) and exogenous (spatiotopic and motion-based) refer ...
Elsevier2015Field-like interactions between motion-based reference frames
A reference frame is required to specify how motion is perceived. For example, the motion of part of an object is usually perceived relative to the motion of the object itself. Johansson (Psychological Research, 38, 379-393, 1976) proposed that the percept ...
Springer2015Spatial properties of non-retinotopic reference frames in human vision
Many visual attributes of a target stimulus are computed according to dynamic, non-retinotopic reference frames. For example, the motion trajectory of a reflector on a bicycle wheel is perceived as orbital, even though it is in fact cycloidal in retinal, a ...
Elsevier2015