Some aspects related to the transformation of the three body wave function built on the Gaussian basis

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Complications from the cardiovascular system in children who have had COVID-19

The article discusses the state of the cardiovascular system in children who have had COVID-19, depending on the severity of the course of the infectious process. We conducted a retrospective analysis of the case histories of 88 children of various ages who were hospitalized with a confirmed diagnosis of a new coronavirus infection COVID-19 in September-November 2020.There were 48 boys (54.6%), girls - 40 (45.4%). According to the classification, the examined children were divided into 4 groups: pre-preschool period (1-3 years) - 9 (10.2%), pre-school period (from 3 to 7 years) - 32 (36.4%), junior school period ( 7-11 years old) - 29 (32.9%) and senior school period (from 12 to 16 years old) - 18 (20.4%) . An analysis of the characteristics of the course of COVID-19 depending on the severity showed that the moderate and severe course of the disease mostly developed in boys (58.5 and 60.0%), the mild course was typical for girls (66.7%)

Reaction of two pion production pd → pdππ in the resonance region

The ANKE@COSY data on the reaction of two-pion production in the GeV region are analyzed within the theoretical model by Platonova and Kukulin. The model includes excitation of the dibaryon resonance DIJ = D03(2380) with the spin J = 3 and isospin I = 0 observed by the WASA@COSY in the reaction pn → dπ0π0, and its decay D03 → D12 + π → d + π + π, where D12(2150) is another dibaryon resonance. Distributions on the invariant masses of the final dππ and ππ systems are calculated

The effect of lithium on the mechanical properties of alloys in the Al-Li system

The article considers the dependence of wear resistance and hardness on each other on the mechanical properties of alloys in the aluminum-lithium system. In experiments, lithium fluorine compound from A K7 and D16 aluminum alloys was added as alloying elements to obtain an aluminum-lithium sample. Based on the mechanical properties of the samples, the hardness was changed in accordance with the Rockwell method and the abrasiveness was investigated.The samples were poured into a heat-resistant furnace at a temperature of 750 °C.The lithium fluoride compound was introduced into the charge in three different masses. Lithium compound with fluorine was added in an amount of 5%, 10% and up to 15% of the total weight of the charge. Based on the conducted experiments, a graph of the dependence of the hardness of the samples and the wear resistance was compiled