Abstract. In this article, thermo-mechanical analysis results of the composite reflectors for the use on the geostationary Earth orbit possibility studies are described. The behavior of two different space reflector structures manufactured on composite materials is investigated. The estimates of reflecting surfaces RMS deviations for the two extreme cases orbital inclinations are presented.

Abstract. This paper presents a calculation method suitable for cable-beam shell structures. It is based on both nonlinear finite element and force density methods. The main idea is to define the solution sequence for stress -strain state problem of above mentioned structures by nonlinear finite element method. Every successive solution involves the previous one as an initial estimate in convergent domain. To find an initial estimate for the first solution a force density method is used. The proposed method is tested on a new large space umbrella reflector.

Introduction. One of the urgent problems of modern pediatrics is the risk of developing vascular complications in children, among which thrombosis is not uncommon. For early diagnosis and thromboprophylaxis of strokes and other vascular complications, the identification of thrombogenic risk factors is indicated. The purpose of the study. Based on the screening, to establish predictors of thrombogenic risk in children living in urban and rural areas of the Altai Territory for the timely prevention of vascular complications. Materials and methods. The results of a screening study of two hundred seventeen aged 12–17 years children living in the city of Barnaul, Zarinsk and Klyuchevsk districts of the Altai Territory, were analyzed. Screening examination of children without signs of thrombosis and bleeding was carried out at an outpatient appointment with a pediatrician in random sampling. The questionnaire included questions to clarify the family thrombotic history, personal thrombotic history, background somatic diseases. Clinical examination was performed for all interviewed patients. Results. According to the results of the study, it was revealed that in 65 (30%) of the 217 children surveyed, the closest relatives had thrombogenic risk factors, such as heart attacks, strokes, hypertension, coronary heart disease (CHD). After analyzing the personal thrombotic history, it was found that in the general group of patients, myocardial infarction was observed in 2 (0.9%) children. Strokes were noted in 5 (2.3%) respondents, and thrombosis and TIA in 2 (0.9%) subjects. When analyzing the results, it was found that a significant proportion of children had the following conditions, such as vegetative-vascular dystonia (VVD) of the hypertensive type, the presence of signs of undifferentiated connective tissue dysplasia (UCTD), smoking, obesity. Conclusion. According to screening data in children, the main predisposing factors in the development of thrombosis, strokes and heart attacks are a burdened family, thrombotic history, the presence of some somatic diseases. The combination of these factors justifies the need for additional examination for the prevention of vascular thrombosis.

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