Massey products in symplectic manifolds

The paper is devoted to study of Massey products in symplectic manifolds. Theory of generalized and classical Massey products and a general construction of symplectic manifolds with nontrivial Massey products of arbitrary large order are exposed. The construction uses the symplectic blow-up and is based on the author results, which describe conditions under which the blow-up of a symplectic manifold X along its submanifold Y inherits nontrivial Massey products from X ot Y. This gives a general construction of nonformal symplectic manifolds.Comment: LaTeX, 48 pages, 2 figure

INCIDENCE OF TEENAGE YOUNG MEN BY THE RESULTS OF MEDICAL EXAMINATION AT INITIAL MILITARY REGISTRATION

Teenagers’ health, the level and structure of incidence reflect totality of the influence of the factors and their living conditions, upbringing and training, a way of life, medical care. The results of medical examination of young men at initial military registration to a sufficient extent give an idea of the prevalence of pathology among this contingent and in many respects characterize the quality of labour and defendable potential. Material and methods. The results of medical examination of teenagers by the military physician board of the Novosibirsk Regional Military Registration and Enlistment Office from 2000 to 2014 with the total number of the examined subjects 252.2 thousand were used. The dynamic and comparative analyses of the indices for three time periods along with the assessment of the prevalence of the diseases by the disease classes, separate nosological groups and also the distribution of young men by the medical classification were carried out. Results. It was established that on average 62.7 % of the examined subjects had this or that pathology. At the same time, 22.5 % of all the diseases were revealed for the first time. It was shown that 87.7–88.7 % of all the pathology accounted for 8 basic classes of diseases. Among the diseases limiting the medical classification the main ones were mental and behavioral disorders and also the diseases of the musculoskeletal system and connective tissue. The temporary unfitness was determined by endocrine, nutritional and metabolic diseases, and the complete one was defined by mental disorders, diseases of the nervous system, endocrine pathology, diseases of the spine and their aftereffects, disorders of refraction and accommodation of the eyes, visual impairment, bronchial asthma, mental retardation, flat foot and other foot deformations, degenerative diseases of the nervous system, which accounted for 63.0 % of all. Conclusion. The study showed the feasibility of using the results of the medical examination to assess the health of teenage young men and the inclusion of these indices in social and hygienic monitoring

Weed plants of oilseed rape agrocoenoses in Tomsk Oblast

The species composition of weed plants in the oilseed rape agrocoenoses in the south part of Western Siberia (Tomsk region) have been studied. There are more than 80 species of weed plants occupied oilseed rape fields on this territory. Euphorbia virgata, Convolvulus arvensis, Stachys palustris, Cirsium setosum and Sonchus arvensis belongs to the most common and widely distributed species of perennial weeds. In the seed lots of Brassica napus L. Metzg. Cultivated in Tomsk Oblast the fruit and seeds of more than 40 weed seeds have been founded

The sensitivity to antibiotics of nosocomial strains of acinetobacter baumanii isolated in the tertiary hospitals in the Central Kazakhstan

Del 1972, en l'actual emplaçament des de 1976. D'acer pintat, mesura 5 x 3,54 x 3,20 metres.Calder, Alexander (escultor)Pla general de l'obra. La galeria Maeght va decidir instal·lar una sucursal a Barcelona i va triar fer-ho al carrer de Montcada. Va obrir amb una exposició que incloïa una peça de Calder, Quatre ales. Després fou oferida a l'Ajuntament

Formulation of the uncertainty relations in terms of the Renyi entropies

Quantum mechanical uncertainty relations for position and momentum are expressed in the form of inequalities involving the Renyi entropies. The proof of these inequalities requires the use of the exact expression for the (p,q)-norm of the Fourier transformation derived by Babenko and Beckner. Analogous uncertainty relations are derived for angle and angular momentum and also for a pair of complementary observables in N-level systems. All these uncertainty relations become more attractive when expressed in terms of the symmetrized Renyi entropies

The Trade-Economic Component of the Regional Economic Processes in the Context of Globalization

The article is concerned with analyzing and defining the structure of the tradeeconomic component of the regional economic processes on example of the EU, ASEAN, BRICS, SCO and NAFTA in the context of globalization. Based on analysis and generalization of numerous scientific works by various authors, a block of theoretical and statistical data on the contemporary regional integration associations has been considered and systematized. The article carries out an analysis of the trade-economic relations by the objectively leading and indicative, as to the current global economic processes, regional integration associations, namely the EU, SCO, BRIC, ASEAN and NAFTA, determines their impact on development of the international economic relations. The structure has been studied, as well as a comparative characterization of the data of regional economic integration associations in the context of global economy has been accomplished. Prospect for further research on this issue is determining the involvement of an individual integration association in the system of contemporary global economic relations

Fixed nitrogen in agriculture and its role in agrocenoses

Received: February 23rd, 2021 ; Accepted: May 12th, 2021 ; Published: May 19th, 2021 ; Correspondence: [email protected] typical low-humus black soils in short crop rotations with legumes (25–33%) and without them, it was found that depending on the set of crops in crop rotation and application of fertilizer rates, nitrogen yield per crop is from 355 kg ha-1 to 682 kg ha-1 . The recommended fertilization system provided nitrogen compensation for crop yields by only 31–76%. Hence, in the plant-fertilizer system nitrogen deficiency varies from 161 to 370 kg ha-1 . The greatest nitrogen deficiency in the soil is observed in crop rotation without the use of fertilizers with the following crop rotation: peas-winter wheat-grain maize-spring barley. The main source of nitrogen for plants is soil nitrogen. In crop rotations with legumes, biological nitrogen is supplied from the air, which in quantitative terms per rotation in crop rotations with peas is 109–288 kg ha-1 , with soybeans 264–312, and with alfalfa 486 kg ha-1 . Biological nitrogen in crop rotations with peas and soybeans is reimbursed from 25 to 62%, in crop rotation without legumes - 9% (non-symbiotic nitrogen fixation), and in crop rotation with alfalfa - 89% of the total nitrogen removal with the crop