Observation of superluminal geometrical resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions

We study Fiske steps in small Bi2Sr2CaCu2O8+x mesa structures, containing only few stacked intrinsic Josephson junctions. Careful alignment of magnetic field prevents penetration of Abrikosov vortices and facilitates observation of a large variety of high quality geometrical resonances, including superluminal with velocities larger than the slowest velocity of electromagnetic waves. A small number of junctions limits the number of resonant modes and allows accurate identification of modes and velocities. It is shown that superluminal geometrical resonances can be excited by subluminal fluxon motion and that flux-flow itself becomes superluminal at high magnetic fields. We argue that observation of high-quality superluminal geometrical resonances is crucial for realization of the coherent flux-flow oscillator in the THz frequency range

Effective attraction between oscillating electrons in a plasmoid via acoustic waves exchange

We consider the effective interaction between electrons due to the exchange of virtual acoustic waves in a low temperature plasma. Electrons are supposed to participate in rapid radial oscillations forming a spherically symmetric plasma structure. We show that under certain conditions this effective interaction can result in the attraction between oscillating electrons and can be important for the dynamics of a plasmoid. Some possible applications of the obtained results to the theory of natural long-lived plasma structures are also discussed.Comment: 14 pages in LaTeX2e, two columns, 3 eps figures; minimal changes, some typos are corrected; version published on-line in Proc. R. Soc.

lmmuno Histochemical Profile of Endometrium in Patients With Genital Endometriosis

The aim of present study was to investigate the occurence of different lymphocyte subsets in the endometrium of endometriosis patients and in healthy women on every day of the menstrual cycle with special emphasis to the proliferative activity of endometrial cells with Ki-S3 antibody. We also conducted immunohistochemical studies of T-lymphocytes, B-lympho-cytes, macrophages, natural-killer-cells and also of antigens class II of the histocompatibility complex (HLA-DR) during the different phases of the menstrual cycle in endometriosis and non-endometriosis patients

Fractional Models of Cosmic Ray Acceleration in the Galaxy

Possible formulations of the problem of cosmic rays acceleration in the interstellar galactic medium are considered with the use of fractional differential equations. The applied technique has been physically justified. A Fermi result has been generalized to the case of the acceleration of particles in shock waves in the supernovae remnants fractally distributed in the Galaxy.Comment: 10 page

Innovative Development Intensification in the Socially Oriented Economies of Belarus and Ukraine: Problems and Factors

The purpose of the article is to study and highlight the main problems and factors characterizing the innovative development intensification in the socially oriented economies of Ukraine and Belarus, and to suggest the ways to eliminate the causes of hindering this intensification. Taking into account the correlation-regression analysis results and the characteristic features of the structural elements of the innovative development index of Ukraine in 2007-2017, we have identified the main problem and a significant factor hindering the innovative activity in the economy, namely, “innovative products sales in the industry”, i.e., the low level of commercialization of the scientific and technical activity results, caused by a low level of patent protection and patent research. The analysis of marketing and patent research in Ukraine shows the necessity to perform a number of the following tasks: 1) to adopt the national standard of Ukraine titled “Patent and Market Research”; 2) to introduce changes to the DSTU 35-75-97 “Patent Research. Basic Provisions and Procedure”, which is the national standard for implementing the process of patent and market research; 3) to adopt the Methodology for Patent and Market research; 4) to eliminate the hindrances for providing enterprises and organizations with modern market and marketing information. Emphasis has been placed on the imperfections in the methodology for evaluating the efficiency of projects related to the innovations implementation, which have recently attracted some interest from businesses. This primarily applies to licenses, as the right to use an invention, industrial design or license can become an object of transference in a specially defined area and during a specified period of time. A methodology for paying for license agreements (contracts, agreements) has been suggested, based on assessing the net present value received from implementing licenses, which determines the cost of licenses and operating costs paid to authors from the license income during the time agreed under the contract. This will intensify the businesses’ innovative activity and create appropriate conditions to develop the socially oriented economies of Belarus and Ukraine

Dual circuit radio frequency identification system of animals

У роботі проаналізовано вплив технічних і біологічних факторів на ефективність роботи систем радіоідентифікації великої рогатої худоби при використанні рідерів з рамковими антенами. Встановлено, що у таких системах достовірність читання кодів транспондерів у значній мірі залежить від відстані і взаємоорієнтації антен транспондерів і рідерів. Для підвищення достовірності читання кодів транспондерів запропоновано використовувати конструктив проходу тварин у якості двоконтурної просторової антени, що індуктивно пов'язана з антеною рідера.This is analyzed the influence of technical and biological factors on the performance of radioidentification systems of cattle by using readers with loop antennas. It is found that the reliability of of reading transponders codes largely depends on the distance and interaction orientation of antennas and transponder readers. To improve the reliability of reading the transponder codes is suggested to use the constructive passage of animals as a twodimensional antenna which inductively is connected with the antenna reade