The effective complex conductivity s5s1 2is2 eff of proximity-coupled Nb/Cu bilayer films at 11.7 GHz is examined. The peak in the real part s1(T) just below Tc in bare Nb films gives way to a broader, shallower peak in s1 (T) as the Cu layer thickness increases, consistent with the existence of coherence effects in proximity-superconducting Cu. The imaginary part s2 (T) changes curvature from ...

This paper contains a strain gradient theory to capture size effects in rotating nanodisks of variable thickness under thermal and mechanical loading. Material properties of nanodisks have been taken homogeneous material. The strain gradient theory and the Hamilton’s principle are employed to derive the governing equations. Due to complexity of the governing differential equation and boundary c...

We present evidence for widespread relativistic effects in the central regions of active galactic nuclei. In a sample of 18 Seyfert 1 galaxies observed by ASCA, 14 show an iron Kα line which is is resolved, with mean width σ Kα = 0.43 ± 0.12 keV for a gaussian profile (Full Width at Half Maximum, FWHM∼ 50, 000 km s −1). However, many of the line profiles are asymmetric. A strong red wing is ind...

In this article, we present a specific shape of disk laser which is side-pumped by four non-symmetric hollow- ducts. The use of non-symmetric hollow duct based on two goals of the uniformity of the pump light distribution profile and the homogeneity of pump light profile through the disk. First of all we simulated the pump light distribution in the disk by using Monte-Carlo ray tracing method. ...

We study the excitation of density and bending waves and the associated angular momentum transfer in gaseous disks with finite thickness by a rotating external potential. The disk is assumed to be isothermal in the vertical direction and has no self-gravity. The disk perturbations are decomposed into different modes, each characterized by the azimuthal index m and the vertical index n, which sp...

We consider the linear global stability of the boundary-layer flow over a rotating sphere. Our results suggest that a self-excited linear global mode can exist when the sphere rotates sufficiently fast, with properties fixed by the flow at latitudes between approximately 55°–65° from the pole (depending on the rotation rate). A neutral curve for global linear instabilities is presented with cri...

The structure and magnitude of the electromagnetic field produced by a rotating accretion disk around a black hole were determined. The disk matter is assumed to be a magnetized plasma with a frozenin poloidal magnetic field. The vacuum approximation is used outside the disk.

The behaviors of functionally graded (FG) engineering structures are influenced by various parameters, such as the boundary temperature, angular velocity, variations in thickness, weight structure, and loading state. thermo-elastic characteristics FG rotating circular disks under contact forces were investigated. Hooke’s law plane stress problems was applied to derive a pair partial differentia...