1 Abstract The role of vorticity dynamics in vortex breakdown is examined in a theoretical and computational study. Under the assumptions of steady, incompressible, axisymmetric, invis-cid ow, a theory is developed concerning the interaction of vortex tilting and stretching in the breakdown process. This analytic theory is then connrmed using an unsteady, incompressible, axisymmetric viscous ow...

One of the cardinal properties of the insulation system of the electrical equipment is its electrical strength. Usually it is expressed as value of breakdown voltage. There is not electrical destruction of material under this one. The determination of breakdown voltage exactly is possible only by doing electrical strength test. It is a destructive test on insulation system made by solid materia...

Protein balance in rat muscles incubated in vitro is influenced by the supply of insulin, leucine and various hormones at physiological concentrations (0.1-0.5 mM) (Goldberg & Chang, 1978; Goldberg et al., 1980). Leucine, but no other amino acid, stimulates protein synthesis and inhibits protein breakdown in this tissue. Metabolism of leucine is necessary for its inhibitory effect on proteolysi...

GaN FETs offer superior advantages in high-voltage and high-temperature operation due to its large bandgap (3.4 eV) and high breakdown field strength (3.3 MV/cm). This combination of the large bandgap and high breakdown field makes these devices very attractive for power switching applications. In this regard, a key figure of merit is the breakdown voltage of the transistor, which must be high ...

Breakdown strength is an important electrical property of insulating paper. Oil-impregnated paper of various aging states was prepared. Its breakdown voltage was then measured at pulsating direct current (DC) voltage with various ripple factors, and alternating current (AC) and DC voltage for comparison, respectively. The AC breakdown voltage is the smallest, and pulsating DC (r = 1/5) breakdow...

A bstruct-Electrical breakdown, both intrinsic and extrinsic, of thin film diodes used as switches in active matrix addressed liquid crystal displays has been studied using eIectrical measurements, thermal measurements, thermal 3D simulations, electrical simulations and post breakdown observations. The diodes used in this study consist of a layer of 30 nm amorphous hydrogenated silicon rich sil...