The hysteretic ac response of the current-induced critical state of superconducting wires (strips of circular or rectangular cross-section) is expressed in a surface impedance formulation. The results for the rectangular strip are shown to be in good agreement with experimental results on the high power nonlinear response of superconducting microwave devices. The approach provides a proper fram...

In this study, resonant frequencies of flexurally vibrating samples were measured using the sonic method (SRM) and impulse excitation technique (IET) to assess equivalency these two methods. Samples made from different materials with shapes (prism rectangular cross-section cylinder circular cross-section). The mean values standard deviations compared t-test F-test. tests showed an both methods ...

this paper presents a new method called vespiary regular hexagonal (vrh) model to calculate parasitic capacitance between conductor wire filaments of one turn of a coil and between conductor wires filament and liner and also total capacitance of n-turns having single-layers, multi-conductor wire filaments of the helix magneto cumulative generator (mcg) coil. the presented method is an analytica...

We demonstrate a novel cross-sectional deformation, called the radial corrugation, of multi-walled carbon nanotubes (MWNTs) under hydrostatic pressure. Theoretical analyses based on the continuum elastic approximation have revealed that MWNTs consisting of more than ten concentric walls undergo elastic deformations at critical pressure pc ≃ 1 GPa, above which the circular shape of the cross sec...