Results 241 to 250 of about 380,733 (291)

Vibronic coupling-driven symmetry breaking and solvation in the photoexcited dynamics of quadrupolar dyes. [PDF]

open access: yesNat Chem
Winte K   +11 more
europepmc   +1 more source

Polarization contrast and motion detection

Journal of Comparative Physiology A, 2006
Form and motion perception rely upon the visual system's capacity to segment the visual scene based upon local differences in luminance or wavelength. It is not clear if polarization contrast is a sufficient basis for motion detection. Here we show that crayfish optomotor responses elicited by the motion of images derived from spatiotemporal variations
Raymon M, Glantz, John P, Schroeter
openaire   +2 more sources

On secular polar motion

Chinese Astronomy and Astrophysics, 1981
Abstract Using the auto-regressive technique, we have analysed data of polar motion, Earth's rotation and excitation function of Earth's atmosphere and obtained their low frequency spectra. These spectra have some periods in common and this fact suggests that these periods are probably real.
Ming Zhao, Da-wei Zheng
openaire   +1 more source

“Polar”-functions for Brownian motion

Zeitschrift für Wahrscheinlichkeitstheorie und Verwandte Gebiete, 1982
Let (Xt)t≧0 denote the 2-dimensional Brownian motion. It is well-known that iff∶R+ →R2 is a constant function, then $$P\{ \exists t > 0\,X_t + f(t) = 0\} = 0.$$
openaire   +2 more sources

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