Poisson Yang-Baxter maps with binomial Lax matrices

A construction of multidimensional parametric Yang-Baxter maps is presented. The corresponding Lax matrices are the symplectic leaves of first degree matrix polynomials equipped with the Sklyanin bracket. These maps are symplectic with respect to the reduced symplectic structure on these leaves and provide examples of integrable mappings. An interesting family of quadrirational symplectic YB maps on $\mathbb{C}^4 \times \mathbb{C}^4$ with $3\times 3$ Lax matrices is also presented.Comment: 22 pages, 3 figure

Exchange coupling in Eu monochalcogenides from first principles

Using a density functional method with explicit account for strong Coulomb repulsion within the 4f shell, we calculate effective exchange parameters and the corresponding ordering temperatures of the (ferro)magnetic insulating Eu monochalcogenides (EuX; X=O,S,Se,Te) at ambient and elevated pressure conditions. Our results provide quantitative account of the many-fold increase of the Curie temperatures with applied pressure and reproduce well the enhancement of the tendency toward ferromagnetic ordering across the series from telluride to oxide, including the crossover from antiferromagnetic to ferromagnetic ordering under pressure in EuTe and EuSe. The first and second neighbor effective exchange are shown to follow different functional dependencies. Finally, model calculations indicate a significant contribution of virtual processes involving the unoccupied f states to the effective exchange.Comment: 4 pages, 6 figure

Ionospheric response to the 2009 sudden stratospheric warming over the equatorial, low, and middle latitudes in the South American sector

The present study investigates the ionospheric total electron content (TEC) and F-layer response in the Southern Hemisphere equatorial, low, and middle latitudes due to major sudden stratospheric warming (SSW) event, which took place during January-February 2009 in the Northern Hemisphere. In this study, using 17 ground-based dual frequency GPS stations and two ionosonde stations spanning latitudes from 2.8°N to 53.8°S, longitudes from 36.7°W to 67.8°W over the South American sector, it is observed that the ionosphere was significantly disturbed by the SSW event from the equator to the midlatitudes. During day of year 26 and 27 at 14:00 UT, the TEC was two times larger than that observed during average quiet days. The vertical TEC at all 17 GPS and two ionosonde stations shows significant deviations lasting for several days after the SSW temperature peak. Using one GPS station located at Rio Grande (53.8°S, 67.8°W, midlatitude South America sector), it is reported for the first time that the midlatitude in the Southern Hemisphere was disturbed by the SSW event in the Northern Hemisphere.Fil: Fagundes, P. R.. Universidade do Vale do Paraíba; BrasilFil: Goncharenko, L. P.. Massachusetts Institute of Technology; Estados UnidosFil: De Abreu, A. J.. Universidade do Vale do Paraíba; BrasilFil: Venkatesh, K.. Universidade do Vale do Paraíba; BrasilFil: Pezzopane, M.. Istituto Nazionale Di Geofisica E Vulcanologia; ItaliaFil: De Jesus, R.. Universidade do Vale do Paraíba; BrasilFil: Gende, Mauricio Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Coster, A. J.. Massachusetts Institute of Technology; Estados UnidosFil: Pillat, V. G.. Universidade do Vale do Paraíba; Brasi

Developing Communicative Competence of Document Specialists at Vocational Pedagogical Universities

Статья посвящена проблеме языковой подготовки документоведов - будущих преподавателей системы среднего профессионального образования. В работе выполнен анализ нормативно-правовой документации, а также учебно-методической литературы; предложена последовательность дисциплин, нацеленных на формирование коммуникативной компетенции студентов-документоведов - будущих преподавателей системы СПО. Результаты могут быть использованы в практике профессиональной подготовки преподавателей-документоведов.The article is devoted to the problem of forming communicative competence of document specialists - would-be vocational education teachers. The analysis of regulatory and legal documentation, as well as educational and methodological literature was carried out. A sequence of disciplines aimed at developing communicative competence of document managers is proposed. The results of the study can be used to train vocational education teachers

Вплив згодовування хелатних комплексів мікроелементів на морфологі-чні та біохімічні показники крові корів

In the article was discusses the questions about the effect of feeding chelate complexes of trace elements of copper (Cu), zinc (Zn), manganese (Mn) on morphological and biochemical blood indicators of cows of Ukrainian black mottled dairy breed on the second month of lactation. For the experiment, 40 cows were selected and formed four groups: one control and three experimental. The cows in the control group fed a premix of sulfate salts of Cu, Zn and Mn in doses that are 100% covered their lack in a forage. Experimental animals from I, II and III groups were fed premixes with chelate complexes of Cu, Zn and Mn, which offset the deficiency of trace elements in the feed ration for 100, 50 and 25% (calculated on pure element), respectively. In animal blood examined the number of red blood cells, white blood cells, hemoglobin, phagocytic activity of neutrophils, and in serum – total protein, albumin, globulin, glucose, total calcium, inorganic phosphorus, carotene, creatinine, urea, cholesterol, activity of AST, ALT and alkaline phosphatase. As a result studies, have shown that blood indicators of the animals were within physiological fluctuations. Found that in the serum of animals of III experimental group the contents of total protein was lowered by 4.1% (P < 0.05) than in the first, and by 3.6% (P < 0.1) relative to the second group. It was determined that the concentration of albumin and total calcium in serum of II experimental group of cows was higher by 4.6% and by 6.0% (P < 0.1), respectively, relative to the third group. Content of inorganic phosphorus in the blood serum of animals of II group was higher at trends over the indicator in the serum of animals of the control and first experimental groups by 8.1% and by 6.9%, respectively. According to other indicators of animals blood does not have significant difference.У статті розглянуто питання щодо впливу згодовування хелатних комплексів мікроелементів Купруму (Сu), Цинку (Zn), Мангану (Mn) на морфологічні та біохімічні показники крові корів української чорно-рябої молочної породи на другому місяці лактації. Для експерименту було відібрано 40 корів і сформовано 4 групи: одну контрольну та три дослідні. В контрольній групі коровам згодовували премікс з сірчанокислими солями Cu, Zn і Mn у дозі, що на 100% покривала їх нестачу в кормах. Дослідним тваринам І, ІІ і ІІІ груп згодовували премікси з хелатними комплексами Cu, Zn і Mn, які компенсували дефіцит мікроелементів в кормах раціону на 100, 50 і 25% (у перерахунку на чистий елемент) відповідно. В крові тварин досліджували кількість еритроцитів, лейкоцитів, вміст гемоглобіну, фагоцитарну активність нейтрофілів, а в сироватці – загальний вміст білка, альбумінів, глобулінів, глюкози, загального Кальцію, неорганічного Фосфору, каротину, креатиніну, сечовини, холестерину, активність АсАТ, АлАТ та лужної фосфатази. В результаті досліджень показано, що показники крові всіх піддослідних тварин перебували у межах фізіологічних коливань. Встановлено, що в сироватці крові тварин ІІІ дослідної групи вміст загального білка був нижчим на 4,1% (Р < 0,05) порівняно з І, та на 3,6% (Р < 0,1) відносно ІІ групи. Визначено, що концентрація альбумінів і Кальцію загального в сироватці крові корів ІІ дослідної групи була вищою на 4,6% та 6,0% (Р < 0,1) відповідно, відносно ІІІ групи. Вміст Фосфору неорганічного в сироватці крові тварин ІІ групи був вищим на рівні тенденції за даний показник у сироватці тварин контрольної і І дослідної групах на 8,1% та на 6,9%, відповідно. За іншими показниками крові тварин не встановлено вірогідної різниці

Investigation of the possibility of using continuous electron beams for electromotive liner hardening. Final report (Task 3)

Continuous laser and electron beams are presently used for surface hardening of steel and cast iron articles. The main advantage of the sources of continuous electron beams over lasers is their high (over 90%) efficiency of conversion of an electric energy to the energy of an electron beam. A promising version of electron-beam system is that including a plasma electron source of the type developed at the Institute of High Current Electronics (IHCE, Tomsk). This type of source has a long lifetime and can operate at a poor vacuum ({approximately} 10{sup {minus}2} torr) in the working chamber. Owing to this they are successfully used for electron-beam welding, melting-on of hardening coatings, and surface hardening of machine parts. The goal of the present work is to elucidate whether it is possible to use a plasma-cathode continuous electron gun for hardening the internal surface of cast iron liners

Multidirectional sexual dimorphism for the live weight in domestic pigs

In mammals, males are typically larger and heavier than females. In particular, the average weight of wild boar females is about 80% of that of the males. In a vast majority of domestic swine populations (breeds, populations of breeding groups), this value varies from 70 to 91% (the central value of the range of variation of 81%). However, there are three genealogically continuous groups of domestic pigs (Vietnamese Masked breed MY, minisibs and Svetlogorsk mini-pigs) that make exceptions. Their specific feature is the reverse sexual dimorphism in weight – mature females are heavier than males. This phenomenon, not typical of the species Sus scrofa, was the reason for the present study. Although this research is preliminary, some assumptions can be made. Firstly, the ratio of the weight of mature females to the weight of mature males is obviously characteristic of the species, deviations from which repressed stabilizing selection. Second, in domestic pigs, normal and reverse sexual dimorphism in weight may be different in nature: in the former case, it is a great length of the period of intensive growth in males, in the latter, a large growth rate of females during the first year of life. The third characteristic of domestic pigs in Southeast Asia, early puberty, may be due to a consistent use of young and therefore small-sized males for reproduction purposes; however, the small size due to their youth, cannot be a target of artificial selection – nor can they be the cause of reverse sexual dimorphism in weight. Finally, reverse sexual dimorphism may be due to a tendency towards early obesity in females, which might be to a single mutation as its genetic cause