Frequency shifts of the (199)Hg(+) 5d (10)6s (2)S1/2 (F = 0, MF = 0) to 5d (9)6s (2 2)D5/2 (F = 2, MF = 0) electric-quadrupole transition at 282 nm due to external fields are calculated, based on a combination of measured atomic parameters and ab initio calculations. This transition is under investigation as an optical frequency standard. The perturbations calculated are the quadratic Zeeman sh...

The significance of the seismic rotational components have been overlooked in the seismic evaluation of structural behavior. As researchers have measured seismic components more accurately using sensitive rotational velocity sensor, it was observed that the magnitude of rotational components is considerable and could not be neglected. Hence, some parts of seismic damage or failure of structures...

Abstract In repeating seismic event sequences within a specialized horizontal area, the moment magnitude is usually scaled with recurrence interval. addition to two dimensions, vertical dimension plays certain role in affecting scaling law. However, whether and how changing depth influences law remain enigmatic. Based on large number of earthquake records high-resolution epicenter locations rec...