Recent evidence suggests that the fine-structure constant c e α h 2 = , a measure of the strength of the electromagnetic interaction between photons and electrons, is slowly increasing over cosmological timescales. High-resolution measurements of quasar spectra suggest that there has been a variation ∆α/α =-0.72 ± 0.18×10 over the past 6-10 Gyr.To model this, we propose variability in the speed...

We describe a new algorithm for computing the camera heading for a multi{frame sequence of tracked points where the camera translates in a constant direction. We also adapt our previous general{motion algorithm to recover the complete structure and motion. We experimentally compare our approach to a standard two{frame algorithm and to the maximum likelihood estimate. We discuss the ipping ambig...

There are few phenomena in condensed matter physics that are defined only by the fundamental constants and do not depend on material parameters. Examples are the resistivity quantum, h/e2 (h is Planck's constant and e the electron charge), that appears in a variety of transport experiments and the magnetic flux quantum, h/e, playing an important role in the physics of superconductivity. By and ...

Random turbulence fluctuations cause continuous in the refractive index, which will eliminate coherence of light waves. Research into atmospheric is fact an investigation index. The constant structure represents a significant parameter that indicative strength turbulence. In present study, performance some standard models, such as Hufnagel-Valley 5/7, Sub-mission Laser Communication, Critical E...

Murphy et al. (2003a, MNRAS, 345, 609) claim to find evidence of cosmological variations of the fine structure constant α in the spectra of intervening QSO absorption line systems. We find that this result is affected by systematic effects. The α values estimated in individual line systems depend on the set of atomic transitions used and therefore the quoted dependence on the cosmic age may ref...