This paper conducts a comparative analysis of internal conflict’s intensity among students according to three parameters (loneliness, guilt, and resentment), taking into account digital technology use. The research was conducted in 2020 in Moscow (Russian Federation) among 98 university students, who were diagnosed with intrapersonal conflict. Interviewing methods and Gestalt therapy were used to reduce the intensity of internal conflicts. The level of three parameters among students at the beginning and at the end of the study was taken into account: loneliness, resentment, guilt. The number of students with a high level of loneliness decreased 25 times (p≤0.001) after therapy. The number of students with an average level of loneliness increased because students with a high level of loneliness moved into this category. The number of students with a maximum level of resentment decreased fivefold, and there was a 17-fold decrease in students with a high level of resentment (p≤0.001). There were no students with a maximum level of guilt after the consultation, while the number of students with a high level of guilt decreased only 0.5 times (p≤0.05) because students from the previous category moved to this one. The most popular activities among students were Internet use (100% of students), reading books (61 students, p≤0.05 compared to the Internet use), and watching TV (32 students, p≤0.01).

The family Gobiidae is the largest teleost family, consisting of more than 2,000 species in more than 200 genera. They have adapted to a wide range of habitats, inhabiting mostly marine and brackish waters. Recently invasive Ponto-Caspian gobies have caused significant changes to the structure of fish assemblage throughout the European waters. The aim of the study was to verify the possibility of identifying three species of the genus Gobiidae based on the analysis of the mitochondrial region of the cytochrome oxidase subunit 1 (COI) gene. 339 samples originated from seven countries and 17 different sites were investigated. Qualitative and quantitative assessment of the extracted DNA was conducted by measuring light absorbance and electrophoretic separation. Approximately 650-bp (base pairs) fragments were amplified from the 5' region of the mitochondrial COI with the PCR (polymerase chain reaction) reaction. Sequences of 652 bp were obtained and compared with reference sequences in the National Center for Biotechnology Information (NCBI). Based on the sequence analysis, we determined that in the analysed geographical regions, the goby preliminary identified morphologically as the round goby was represented by three species: round goby ( Neogobius melanostomus), tubenose goby ( Proterorhinus marmoratus), and monkey goby ( Neogobius fluviatilis). The latter two are newly reported for their new habitats. Genetic characterisation of such populations offers the opportunity to assess their genetic stability, which provides agencies managing the aquatic environment in EU countries with a tool for revising the legislation, including regulations relevant for updating the status of native and invasive species in European waters.

The perovskites XBiO3 (X = Al, Ga, In) have been studied in terms of mechanical, optical and thermoelectric behavior for energy harvesting application. Density functional theory is applied to study electronic, optical and thermoelectric properties of the studied materials. Structural, mechanical and thermodynamic stabilities are confirmed from the tolerance factor, Born mechanical stability and formation energy/specific heat capacity. Poisson and Plough ratios show the studied materials are ductile and have ability to withstand pressure. Band structure analysis shows the indirect band gap 3.0/2.1/1.0 eV for ABO/GBO/IBO. A complete set of optical spectra is reported by dielectric constants, refractive index, optical conduction, absorption of light and optical loss energy. Shifting of maximum absorption band to visible region increases the potential of perovskites XBiO3. Transport characteristics are also investigated by electrical conductivity, Seebeck coefficient and figure of merit.