scholarly journals INVESTIGATION OF CHANGES IN THE SPHERICAL SHELL SHAPE UNDER THE ACTION OF PULSED LOADING DUE TO CONTACT INTERACTION WITH A RIGID BLOCK

2015 ◽  
Vol 56 (6) ◽  
Keyword(s):  
Spherical Shell ◽  
Contact Interaction ◽  
Shell Shape ◽  
Rigid Block ◽  
Pulsed Loading

THEORY OF OPTICAL ABSORPTION IN A SMALL SPHERICAL SHELL: INVESTIGATION OF QUANTUM-SIZE EFFECT

1996 ◽  
Vol 03 (01) ◽  
pp. 151-155 ◽  
Author(s):  
MIKIO ETO ◽  
KIYOSHI KAWAMURA
Keyword(s):  
Optical Absorption ◽  
Size Effect ◽  
Resonant Frequency ◽  
Spherical Shell ◽  
Random Phase ◽  
System Size ◽  
Quantum Size Effect ◽  
Shell Shape ◽  
Hartree Fock ◽  
Quantum Size

To investigate the quantum-size effect on optical absorption spectra in a small metallic particle of a spherical shell shape, first-principles calculations are performed based on the Kubo formula. The resonant frequency of collective modes and their linewidth are studied systematically with Hartree-Fock and random-phase approximations, which are self-interaction-free methods. System-size dependence of the resonant frequency of the modes is in good agreement with the classical theory, while the linewidth reflects the quantum-size effect, which cannot be explained classically. The origin of the line broadening should be attributed to the Landau damping.

Distorted flux lines behavior in type II superconducting spherical shell: Application to high temperature superconductor

1988 ◽  
Vol 02 (05) ◽  
pp. 1121-1132 ◽  
Author(s):  
A. G. Saif
Keyword(s):  
High Temperature ◽  
Spherical Shell ◽  
Applied Field ◽  
High Temperature Superconductors ◽  
Flux Line ◽  
Shell Shape ◽  
Stray Field ◽  
Type Ii ◽  
Flux Lines ◽  
The Magnetic Field

A model of a type II superconducting grains (of a spherical shell shape) is suggested to verify the properties of distorted flux lines (FLs) in high temperature superconductors (HTS). The magnetic fields distributions and current density are formulated. It will be shown that the magnetic field inside a superconducting region is composed of the penetrating applied field, FLs fields, and a stray field. Outside the superconductor, there is only the applied field and the stray field . However, in the normal interior region (r < a), there is only the stray field. Moreover, the forces on the flux line (FL) segments are completely determined.

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