Field-Dependent Critical Current in Type-II Superconducting Strips: Combined Effect of Bulk Pinning and Geometrical Edge Barrier

Recent theoretical and experimental research on low-bulk-pinning superconducting strips has revealed striking dome-like magnetic-field distributions due to geometrical edge barriers. The observed magnetic-flux profiles differ strongly from those in strips in which bulk pinning is dominant. In this paper we theoretically describe the current and field distributions of a superconducting strip under the combined influence of both a geometrical edge barrier and bulk pinning at the strip's critical current Ic, where a longitudinal voltage first appears. We calculate Ic and find its dependence upon a perpendicular applied magnetic field Ha. The behavior is governed by a parameter p, defined as the ratio of the bulk-pinning critical current Ip to the geometrical-barrier critical current Is0. We find that when p > 2/pi and Ip is field-independent, Ic vs Ha exhibits a plateau for small Ha, followed by the dependence Ic-Ip ~ 1/Ha in higher magnetic fields.Comment: 4 pages, 2 figures, Fig. 1 revised, submitted to Phys. Rev.

Herpes zoster: Epidemiology, clinical manifestations, algorithms of diagnosis, treatment, and prevention

The present article outlines some important aspects of herpes zoster epidemiology and presents the algorithms of its diagnosis, treatment, and prevention in routine clinical practice of an infectious disease physician. Particular attention is paid to the early antiviral therapy of herpes zoster with Valacyclovir. © 2019, Dynasty Publishing House. All rights reserved

Current view on blastocystis species: Clinical forms, diagnosis and treanment

The symptomatic form of Blastocystis spp. infection not only with mild diarrhea or dysentery-like syndrome, but also with the development of severe ulcerative necrotic lesions of the intestine. Meanwhile, the pathogenicity of these microorganisms should not be exaggerated, due to majority asymptomatic cases or infection transmission with minor impaired bowel function. © 2020 Consilium Medikum. All rights reserved

How bird droppings can affect the vegetation composition of ombrotrophic bogs

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