Transport barrier inside the reversal surface in the chaotic regime of the reversed-field pinch.

Magnetic field lines and the corresponding particle orbits are computed for a typical chaotic magnetic field provided by a magnetohydrodynamics numerical simulation of the reversed-field pinch. The m = 1 modes are phase locked and produce a toroidally localized bulging of the plasma which increases particle transport. The m = 0 and m = 1 modes produce magnetic chaos implying poor confinement. However, they also allow for the formation of magnetic islands which induce transport barriers inside the reversal surface.

[Preliminary approach to the mental component in dermatologic patients]. / Approccio preliminare sulla componente psichica in dermopazienti.

The aim of this study was to approach on a psychical point of view 27 patients suffering from chronic idiopathic urticaria (14), pruritus sine materia (6), alopecia areata (3), pathomimia (4), in order to examine the possibility that psychic disorders could act as triggering or aggravating the dermatological affection. Psychical assessment was evaluated by colloquy and by the administration of some psychodiagnostic tests: EPI, MMPI, Zung. The role of psychogenic factors in skin diseases is emphasized and the results obtained from the use of antidepressant and minor tranquilizer drugs are discussed.