MOTIVATION FOR ATTENDING PHYSICAL EDUCATION LESSONS BY 14-15 YEAROLD STUDENTS

The level of motor training of students is not a stable index over a period of time. It degrades if the physical activity of the individual is reduced or the practice of physical exercises does not have a systematic character. This process takes place, for example, at the beginning of the school year, for the students who did not play sports during the holidays. For this reason, one of the tasks of physical school education is to train - educate students and form the stable motivation for practicing physical exercises throughout the year, the formation of the skills and abilities to organize the physical activity independently, based on the consideration that, over time, the motivation for practicing physical exercises will decrease. But the motivation is closely related to the gratification of what students have in relation to the physical education lessons. It has been established that the gratification of the physical education lessons is tested by 60% of the students in the primary classes, while in the secondary classes only 30%. The degree of gratification from the physical education lessons is an important component of the children's attitude towards this discipline. Motivated physical activity is one of the most important characteristics of modern physical culture.

ВЛИЯНИЕ ВОЗРАСТА ПЕРВОГО ОТЕЛА КОРОВ ГОЛШТИНСКОЙ ПОРОДЫ НА УРОВЕНЬ ПРОДУКТИВНОСТИ И ФАКТОРЫ ЕСТЕСТВЕННОЙ РЕЗИСТЕНТНОТИ

Исследования проведены в Московском регионе на 2 группах первотелок голштинской породы. В I группу вошли животные, срок отела которых составил 26 мес, во II — первотелки, отел которых прошел в возрасте 31 мес. Изучены показатели молочной продуктивности, воспроизводительные качества и иммунологическая активность клеток крови животных в период лактации. В результате проведенных исследований установлено некоторое превосходство по удою у первотелок с более ранним периодом отела (на 333 кг) и снижение сервис-периода на 41,2 дня. У животных более позднего срока отела на фоне достаточно устойчивого показателя корреляции сегментоядерные нейтрофилы/лимфоциты установлено снижение стабильности работы иммунной системы, что выразилось в увеличении значимых корреляций (до 6) между клеточными факторами иммунитета по сравнению с животными более раннего срока отела, у которых таких корреляций было лишь 4. Усиление корреляции IgG/IgМ до -0,388 (Р≤0,05) свидетельствует о напряженности работы иммунной системы в период лактации у первотелок с более поздним сроком отела. Установлены значимые отрицательные корреляции сегментоядерные нейтрофилы /эозинофилы (r=-0,447 и r=-0,487 (Р≤0,05) соответственно по группам, что может быть связано с усилением фагоцитирующей функции организма животных. Полученные данные могут быть полезны при оценке состояния здоровья коров голштинской породы и оптимизации сроков их первого осеменения. INFLUENCE OF THE AGE OF THE FIRST CALVING OF HOLSTEIN COWS ON THE LEVEL OF PRODUCTIVITY AND FACTORS OF NATURAL RESISTANCE The study was conducted in the Moscow region on 2 groups of Holstein cows. The first group included animals whose calving period was 26 months, and the second group included first-calves, whose calving occurred at the age of 31 months. The indicators of milk productivity and reproductive qualities of animals were studied. Immunological activity of animal blood cells during lactation. As a result of the conducted studies, some superiority in milk yield was established in cows with an earlier calving period (by 333 kg) and a reduction in the period from calving to insemination by 41.2 days. In cows of the later calving period, against the background of a fairly stable index of segmented neutrophils/lymphocytes, a decrease in the stability of the immune system was found, which was expressed in an increase in the number of reliable correlations (up to 6) between cellular immunity factors compared to animals of the earlier calving period, in which there were only 4 such correlations. An increase in the IgG/IdM correlation to (r=-0.388) (P < 0.05) indicates an increase in the intensity of the work of the immune system during lactation in animals with a later calving period. Significant negative correlations of segmental neutrophils /eosinophils were found in the groups (r=-0.447 and r=-0.487 (P < 0.05), respectively), which may be associated with an increase in the phagocytic function of the animal body. The data obtained can be useful in assessing the health status of Holstein cows and optimizing the timing of the first insemination of animals.

Weak well-posedness of multidimensional stable driven SDEs in the critical case

We establish weak well-posedness for critical symmetric stable driven SDEs in [Formula: see text] with additive noise [Formula: see text], [Formula: see text]. Namely, we study the case where the stable index of the driving process [Formula: see text] is [Formula: see text] which exactly corresponds to the order of the drift term having the coefficient [Formula: see text] which is continuous and bounded. In particular, we cover the cylindrical case when [Formula: see text] and [Formula: see text] are independent one-dimensional Cauchy processes. Our approach relies on [Formula: see text]-estimates for stable operators and uses perturbative arguments.

Absolute negative mobility in the anomalous diffusion

Transport of an inertial Brownian particle driven by the multiplicative Lévy noise was investigated here. Numerical results indicate that: (i) The Lévy noise is able to induce absolute negative mobility (ANM) in the system, while disappearing in the deterministic case; (ii) the ANM can occur in the region of superdiffusion while disappearing in the region of normal diffusion, and the appropriate stable index of the Lévy noise makes the particle move along the opposite direction of the bias force to the maximum degree; (iii) symmetry breaking of the Lévy noise also causes the ANM effect. In addition, the intrinsic physical mechanism and conditions for the ANM to occur are discussed in detail. Our results have the implication that the Lévy noise plays an important role in the occurrence of the ANM phenomenon.

Sensitivity of vegetation indices in relation to parameters of Norway spruce stands

The main goal of this research is to shed further light on the sensitivity of the vegetation indices to spatial changes of stand parameters. The analysis was done within mountain forests in the Sudetes and the Beskids in southern Poland. Some 1327 stands were analysed with more than 70 percent of spruce contribution in the species composition. The response of selected vegetation indices was verified in relation to the alterations of spruce participation, stand height, volume, stand density and diameter. The following indices were analysed: Normalized Difference Vegetation Index, Normalized Difference Red Edge Index, Green Normalized Difference Vegetation Index and Wide Dynamic Range Vegetation Index. Indices were calculated based on the Rapid Eye (Black Bridge) images. All the analysed stand characteristics influence the values of vegetation indices. In general: mean height, diameter at breast height, volume and spruce participation are the most negatively correlated with the indices. Density is a variable that, in general, cannot directly be used for indices correction, because it is hard to find any stable trend. NDRE is the most stable index for the analysis of stand characteristics.

Flexible periodic points

We define the notion of ${\it\varepsilon}$-flexible periodic point: it is a periodic point with stable index equal to two whose dynamics restricted to the stable direction admits ${\it\varepsilon}$-perturbations both to a homothety and a saddle having an eigenvalue equal to one. We show that an ${\it\varepsilon}$-perturbation to an ${\it\varepsilon}$-flexible point allows us to change it to a stable index one periodic point whose (one-dimensional) stable manifold is an arbitrarily chosen $C^{1}$-curve. We also show that the existence of flexible points is a general phenomenon among systems with a robustly non-hyperbolic two-dimensional center-stable bundle.

ZnSe Quantum Dot Films Deposition from Modified Chemical Solution with Sodium Citrate

Zinc selenide (ZnSe) quantum dot thin films have been deposited onto microscope glass through chemical bath deposition both from original amonia free alkaline precursors and modified precursors with the adding of sodium citrate as complexing agents. The growth and optical properties of samples from original and modified precursors have been investigated. Its shown that the samples obtained with sodium citrate precursors are uniform and with stable index of refraction. And with the adding of sodium citrate, there is an increase in transmittance.