By postulating that the non-hydrostatic features of the Earth's gravitational potential are due to harmonic undulations of a nearly spherical internal surface with a density contrast, and that the stresses arising at this surface are of comparable magnitudes for all harmonic terms, it is found that the density anomalies responsible for the geoid must be in the upper mantle, at depths less than 1000 km.
In the current Discount Ghd Flat Iron
study the free vibrations of stepped anisotropic rectangular plates on elastic foundation are considered. The anisotropic stepped Cheapest Ghd Online Uk
plate has a part-through crack at the re-entrant corner of the step. Natural frequencies of the plate are calculated for the given crack length. The influence of physical properties and geometric parameters on the natural frequencies is analyzed.
Some fixed-point theorems are established for weakly contractive operators. These results will then be used to establish existence principles for functional, differential, and integral equations.
Rank technique is applied to define disturbed and quiet periods in the ionosphere using Total Electron Content (TEC) data and models. Five main signatures are applied to assess storminess: (1) quiet/disturbed threshold, (2) sign of deviation, (3) storm duration, (4) maximum disturbance index reached, (5) average index during storm period. Models may be updated by feeding-in actual TEC data.