Attitude of Polotsk state university students to the transition to distance learning during the pandemic covid-19

The opinion of students of Polotsk State University regarding the organization of the educational process during the COVID-19 pandemic is considered. The negative and positive aspects of this form of education are noted. Special attention is paid to the discipline "Physical Culture", as in the conditions of home self-isolation and forced restriction of physical activity, the need for physical activity increases significantly

Pioneer lichen communities of the Teteriv River Basin (Ukraine)

The results of phytosociological studies of pioneer lichen communities of siliceous outcrops carried out in 2014–2016 in Teteriv River basin (Ukraine) are provided. The dataset of 302 relevés was analysed, 6 associations and 1 subassociation from 3 classes were distinguished as a result of the phytosociological survey in the Teteriv River basin. Four associations, i.e.: Aspicilietum contortae Kaiser ex Klement 1955, Cladonietum mitis Krieger 1937, Parmelietum conspersae Hilitzer 1925, Parmelietum somloensis Wirth 1995 and the alliance Aspicilion calcareae Albertson ex Roux 1978 are new for Ukraine, and one new association Aspicilio cinerei-Ramalinetum pollinariae Kapets et Khomyak, ass. nova is described here

Attitude of Polotsk state university students to the transition to distance learning during the pandemic covid-19

The opinion of students of Polotsk State University regarding the organization of the educational process during the COVID-19 pandemic is considered. The negative and positive aspects of this form of education are noted. Special attention is paid to the discipline "Physical Culture", as in the conditions of home self-isolation and forced restriction of physical activity, the need for physical activity increases significantly

Terahertz cavity magnon polaritons

Hybrid light-matter coupled states, or polaritons, in magnetic materials have attracted significant attention due to their potential for enabling novel applications in spintronics and quantum information processing. However, most studies to date have been carried out for ferromagnetic materials with magnon excitations at gigahertz frequencies. Here, we have investigated strong resonant photon-magnon coupling at frequencies above 1 terahertz for the first time in a prototypical room-temperature antiferromagnetic insulator, NiO, inside a Fabry-P\'erot cavity. The cavity was formed by the crystal itself when it was thinned down to an optimized thickness. By using terahertz time-domain spectroscopy in high magnetic fields up to 25 T, we swept the magnon frequency through Fabry-P\'erot cavity modes and observed photon-magnon anticrossing behavior, demonstrating clear vacuum Rabi splittings exceeding the polariton linewidths. These results show that NiO is a promising platform for exploring antiferromagnetic spintronics and cavity magnonics in the terahertz frequency range