Our goal is to recognize human actions at a distance, at resolutions where a whole person may be, say, 30 pixels tall. We introduce a novel motion descriptor based on optical flow measurements in a spatio-temporal volume for each stabilized human figure, and an associated similarity measure to be used in a nearest-neighbor framework. Making use of noisy optical flow measurements is the key chal...

We present a model where a non-conventional scalar field may act like dark energy leading to cosmic acceleration. The latter is driven by an appropriate field configuration, which result in an effective cosmological constant. The potential role of such a scalar in the cosmological constant problem is also discussed. ∗e-mail: [email protected] June 2006 During the last years, evidence of an accel...

A 2015 experiment by Hanson and Delft colleagues provided further confirmation that the quantum world violates Bell inequalities, being first test to close two known experimental loopholes simultaneously. The was also taken provide new evidence of 'spooky action at a distance'. Here we argue for caution about latter claim. relies on entanglement swapping, our main claim is this geometry introdu...