Gunn Oscillators Based on Shielded Dielectric Resonators with Mechanical Frequency Tuning

The features of Gunn oscillators based on shielded dielectric resonators with whispering gallery modes and ray oscillations are investigated. Their comparative analysis for oscillators with different dielectric resonant structures is carried out

Self-Adjointness of Generalized MIC-Kepler System

We have studied the self-adjointness of generalized MIC-Kepler Hamiltonian, obtained from the formally self-adjoint generalized MIC-Kepler Hamiltonian. We have shown that for \tilde l=0, the system admits a 1-parameter family of self-adjoint extensions and for \tilde l \neq 0 but \tilde l <{1/2}, it has also a 1-parameter family of self-adjoint extensions.Comment: 11 pages, Latex, no figur

Registration of Electrons with Energies Greater than 30 Kev in the Near-lunar Space

Measured high energy electron flux in lunar environment by gas-discharge counter on lunar prob

Nonequidistant two-dimensional antenna arrays are based on Latin squares for registration of cosmic, atmospheric and lithospheric radiation

The possibility of using Latin squares for constructing two-dimensional non-equidistant antenna arrays that can be used for development of radio telescopes and systems for remote sensing of atmospheric and lithospheric radiation has been shown. An algorithm for calculating the coordinates of elements of a non-equidistant antenna array using the values of elements of Latin squares is proposed. It is shown that in this case, it is possible to obtain an almost complete coverage of the grid of spatial frequencies in the region of the arrangement of the elements at small filling coefficients of array. Directional patterns are studied and the side lobes levels are estimated for non-equidistant antennas obtained on the basis of Latin squares. The possibility of synthesizing of large antenna arrays on the basis of composite squares using the embedding of generative Latin squares is shown. The characteristics of the obtained arrays are studied. It is shown that using the shifts and mutual rotations of individual layers is involved in the synthesized array; its characteristics can be substantially improved

Registration of Solar Cosmic Rays on the AMS ''luna-11''

Proton flux measurements onboard lunar prob

Aneurysm of internal carotid artery, which simulated paratonsillary abscess (clinical case)

This article describes a rare case of paratonsillar abscess imitation among the patients with the aneurysm of ICA. The purpose of the study is to describe the methods of this disease diagnosing using the example of a clinical case, to give a general description of this nosology occurrence frequency, and to recommend a detailed approach to the differential diagnosis among this category of patient

Double-kink fishbone instability caused by circulating energetic ions

The destabilization of double kink modes by the circulating energetic ions in tokamaks with the plasma current having an off-axis maximum is studied. It is shown that the high-frequency fishbone instability [Energetic Particle Mode (EPM)] and the low-frequency (diamagnetic) fishbones are possible for such an equilibrium, their poloidal and toroidal mode numbers being not necessarily equal to unity. A new kind of the EPM instability, ''doublet fishbones,'' is predicted. This instability is characterized by two frequencies; it can occur in a plasma with a non-monotonic radial profile of the energetic ions when the particle orbit width is less than the width of the region where the mode is localized. It is found that the diamagnetic fishbone branch exists even when the orbit width exceeds the mode width; in this case, however, the instability growth rate is relatively small

Microwave Oscillator with the Shielded Dielectric Resonator

A Gunn oscillator with partially shielded hemidisk quasioptical resonator is investigated experimentally in this paper. The investigations of the generation characteristics of oscillations by the semiconductor diode in this resonator are carried out for the different radial co-ordinates of the oscillator active element. The advantages of the investigated oscillator in comparison with the oscillator with an open dielectric resonator are show

Frailty Syndrome and Main Geriatric Syndromes in Surgical Clinical Picture

The paper represents an original research dedicated to one of the topical issues of the modern geriatrics - frailty syndrome. The rate of the syndrome incidence among the patient of the elderly and old age of the surgical profile has been specified; the increase in prevalence and degree of the frailty syndrome severity in the patients after surgical treatment has been confirme