Membrane Cascade Type of «Continuous Membrane Column» for Power Plant Post-Combustion Carbon Dioxide Capture Part 1: Simulation of the Binary Gas Mixture Separation.

The present paper deals with the complex study of CO capture from combined heat power plant flue gases using the efficient technological design of a membrane cascade type of «Continuous Membrane Column» for binary gas mixture separation. In contrast to well-known multi-step or multi-stage process designs, the cascade type of separation unit provides several advantages. Here, the separation process is implemented in it by creating two counter current flows.

Terahertz amplification and lasing by using transverse electric modes in a two-layer-graphene-dielectric waveguide structure with direct current.

We study for the first time the interaction between the waveguide modes of graphene structure and freely propagating terahertz (THz) electromagnetic waves (this interaction takes place within the light cone). We revealed a new and rather unexpected physical phenomenon by showing that freely incident THz electromagnetic waves can resonate with the surface transverse electric (TE) modes of the graphene waveguide in virtue of these modes having their dispersions in the vicinity of the light cone. The dispersion and amplification of surface TE modes in a dielectric waveguide covered with two graphene layers biased by direct current (DC), as well the amplification and lasing of incident THz wave by excitation of TE mode resonances, are investigated.

LONG-TERM BLOOD PRESSURE VARIABILITY IN STRENGTH AND ENDURANCE PROFESSIONAL ATHLETES WITH OFFICE PREHYPERTENSION OVER ANNUAL TRAINING MACROCYCLE.

Considering the high spreading of arterial hypertension (AH) in professional athletes involved in different types of physical activities, as well as the high probability of its development in individuals with high normal blood pressure (BP), we aimed at investigating the daily profile of BP during three periods of annual training summer macrocycle: the preparation, competitive and transition ones. The investigation included 30 athletes having levels of systolic BP ≥130 and <140; as well as diastolic BP ≥ 85 and <90 mmHg during a thorough office examination in the preparation phase, who were divided into two groups without changes on age, sex, the duration of the sporting career depending on the type of a performed physical activity - strength (Str) and endurance (End). The athletes underwent office BP measurements and home BP monitoring (over the course of 3-7 days (M=5.

Terahertz transverse electric modes in graphene with DC current in hydrodynamic regime.

The dispersion, excitation, and amplification of electromagnetic transverse electric (TE) modes at terahertz (THz) frequencies in graphene in the hydrodynamic (HD) regime, with a direct electric current flowing perpendicular to the TE mode wavevector, were theoretically investigated. The expression for the nonlocal HD conductivity of graphene with a direct electric current flowing perpendicular to the TE mode wavevector was derived. The direct electric current in graphene leads to the capacitive nature of the graphene HD conductivity at THz frequencies, which makes TE modes exist in this frequency range.

Social and Economics Aspects of The Pandemic Influence in Ukraine.

The pandemic has exacerbated a wide range of medical, economic, and social factors that have affected people's lives and health. A systematic approach to the study of these factors in Ukraine involves statistical and expert analysis in the field of health and socio-economic consequences of the pandemic. The article analyzes the state and problems of public health in Ukraine.