We develop a novel perturbation theory formulation to evaluate polarization-mode dispersion (PMD) for a general class of scaling perturbations of a waveguide profile based on generalized Hermitian Hamiltonian formulation of Maxwell’s equations. Such perturbations include elipticity and uniform scaling of a fiber cross section, as well as changes in the horizontal or vertical sizes of a planar w...

A recently assembled data set of inner core-sensitive free oscillation splitting measurements and body wave differential travel times provides constraints on the patterns of anisotropy in the Earth's inner core. Applying a formalism that allows departures from radial symmetry and cylindrical anisotropy results in models with P-wave velocity distributions whose strength and pattern are incompati...

A relatively stable specific complex of the chromatin core histones H2A, H2B, H3, and H4 has been obtained in 2 M NaCl/25 mM sodium phosphate buffer, pH 7.0. The histone core complex has an apparent specific volume of 0.73 ml/g. Its sedimentation coefficient was dependent on rotor speed (angular velocity, omega) and attained different stable values at low and high rotor speeds. The drop in sedi...

A large-scale, relativistic configuration-interaction ~RCI! method has been developed for precision calculations of transition oscillator strengths. It is based on the no-pair Hamiltonian and employs finite B-spline basis functions. For the 2s S0 –2s2p P1 intercombination transition in berylliumlike carbon, the present RCI expansions reach close to 200 000 configurations, and include all single...

The statistical correlation between the locations of hot spots at the surface of Earth and the distribution of ultra-low-velocity zones at the base of the mantle has about a 1 percent chance of arising randomly. This correlation is more significant than that between hot spots and negative velocity anomalies in tomographic models of deep mantle compressional and shear velocity. This correlation ...

Fluctuation properties are analyzed in the Large Helical Device (LHD) for discharges exhibiting a non-local core temperature rise in response to edge cooling by injection of a Tracer Encapsulated Solid Pellet (TESPEL). Edge ion gyro-scale density fluctuation amplitudes, measured with a 2D CO2 phase contrast imaging system, are found to increase as the core temperature is rising and is therefore...

Data from earthquakes in the Tonga-Fiji region recorded at a seismic array in northern Australia show evidence for rigid zones at the top of the outer core. The ScP waveforms can be modeled by thin (0.12 to 0.18 kilometer) zones of molten iron mixed with solid material with a small, but positive, S-wave velocity (0.6 to 0.8 kilometer per second) that enables the propagation of S-waves in the ou...

A shear band is assumed to propagate at a uniform velocity in a thermoviscoplastic body being deformed in mode-II. The deformation ®eld appears steady to an observer situated on and moving with the shear band tip. The region around the shear band tip is divided into a core region and an inertial region. The core region is behind the shear band tip, and the inertial region surrounds the band tip...