Адсорбция водорода на чистых и допированных углеродных нанотрубках: DFT моделирование

Рассматривается адсорбция нескольких молекул водорода на внешней и внутренней поверхности комплекса "углеродная нанотрубка (9,9)@Li". Численные эксперименты проводились в пакете SIESTA в двух приближениях для обменно-корреляционного потенциала: приближении обобщенных градиентов (GGA) и приближении локальной электронной плотности (LDA). Моделирование показало, что добавление атома лития позволяет увеличить энергию адсорбции 3-4 молекул водорода (расположенных в первой координационной сфере Li) по сравнению со случаем сорбции на чистой поверхности углеродной нанотрубки. При этом энергии связи попадают в диапазон 200-700 мэВ/(молекулу Н[2]), обеспечивающий эффективность циклов сорбции/десорбции газа, только в случае внутренней сорбции

The analysis of pi^{-} mesons produced in nucleus-nucleus collisions at a momentum of 4.5 GeV/c/nucleon in light front variables

The light front analysis of pi^{-} mesons in He(Li,C), C-Ne, C-Cu and O-Pb collisions is carried out. The phase space of secondary pions is divided into two parts in one of which the thermal equilibrium assumption seems to be in a good agreement with the data. Corresponding temperatures T are extracted and their dependence on (A_{P}*A_{T})^{1/2} is studied. The results are compared with the predictions of the Quark-Gluon String Model (QGSM). The QGSM satisfactorily reproduces the experimental data for light and intermediate-mass nuclei.Comment: 14 pages with 9 postscript figure

Single Spin Asymmetry Parameter from Deeply Virtual Compton Scattering of Hadrons up to Twist-3 accuracy: I. Pion case

The study of deeply virtual Compton scattering has shown that electromagnetic gauge invariance requires, to leading order, not only twist two but additional twist three contributions. We apply this analysis and, using the Ellis-Furmanski-Petronzio factorization scheme, compute the single (electron) spin asymmetry arising in the collision of longitudinally polarized electrons with hadrons up to twist 3 accuracy. In order to simplify the kinematics we restrict the actual calculation to pions in the chiral limit. The process is described in terms of the generalized parton distribution functions which we obtain within a bag model framework.Comment: 18 pages, Late

Light-Front Analysis of pi^{-} Mesons Produced in Mg - Mg Collisions at 4.3 a Gev/c

Light-front analysis of pi^{-} mesons in Mg-Mg collisions is carried out. The phase space of secondary pions is naturally divided into two parts in one of which the thermal equilibration assumption seems to be in a good agreement with data. Corresponding temperatures are extracted and compared to the results of other experiments. The experimental results have been compared with the predictions of the Quark Gluon String Model (QGSM) and satisfactory agreement between the experimental data and the model has been found.Comment: 14 pages with 7 postscript figures. accepted for publication in Nucl. Phys.

On the cellular autoimmune mechanism for eliminating erythrocytes normally and under extreme influences

The presence of an autoimmune cellular mechanism for destroying erythrocytes on the basis of results of experiments in vivo is demonstrated in the blood and the organs. This mechanism is made up of a population of immunocompetent killer-lymphocytes which originates in the bone marrow and the thymus, and which is manifested in the local hemolysis effect

Application of probability methods to research of one type of exotic options in diffusion model (B, S)- of the financial market

The decision of optimum hedging problem for the European options of purchase and sale of the exotic type when possible payments on options are limited by the set value is resulted. The formulas defining costs of options and also evolution in time of portfolios and capitals, i. e. hedging strategy and corresponding to them are obtained. Some properties of decisions are investigated

The Light Front Analysis of pi^{-} Mesons Produced in the Relativistic Nucleus-Nucleus Collisions

The light front analysis of pi^{-} mesons in A_{P} (He, C, Mg, O) + A_{T} (Li,C, Ne, Mg,Cu,Pb) collisions is carried out. The phase space of secondary pions is naturally divided into two parts in one of which the thermal equilibration assumption seems to be in a good agreement with data. Corresponding temperatures are extracted and compared to the results of other experiments. The dependence of the average temperature T on (A_{P}*A_{T})^{1/2} is studied.Comment: 15 pages with 13 postscript figure

Methodological aspects of prioritization of financial tools for stimulation of innovative activities

The article offers methodical recommendations on evaluation of financial & investment and innovational potential of the region. Evaluation of innovational potential of the territory was conducted on the basis of hierarchical ranking assessments. Financial and investment potential is considered to be equal to net savings per capita. The authors view the possibility for development of financial and innovational strategy of region’s development on the basis of evaluation of these potentials. The article analyzes financial & investment and innovational potentials of the regions of the Southern Federal District. On the basis of correlation of the above potentials, matrix of prioritization of financial tools of stimulation of innovative activities is offered.peer-reviewe

ТЕНДИНОПАТИЯ СУХОЖИЛИЯ ТРИЦЕПСА ГОЛЕНИ. ЭТИОЛОГИЯ, КЛИНИКА, ЛУЧЕВАЯ ДИАГНОСТИКА

Tendonopathy of the sinus triceps tendon is characterized by a variety of clinics and nosological manifestations, the presence of combined forms, nonspecific symptoms, which complicates the diagnosis. Deep clinical analysis, the use of modern methods of functional and radiation diagnostics, such as ultrasonic diagnostics and magnetic resonance imaging, allow early diagnosis of the pathology of the Achilles tendon. In this literature review, the main causes of changes in Achilles tendons in individuals of different ages, their clinical manifestations are collected. The most frequently used methods of radiation diagnostics are: ultrasonic diagnostics of the Achilles tendon, ultrasound sonoelastography, visualization technology of acoustic radiation of the pulse force, magnetic resonance imaging of the ankle joint. The main functional and radiation manifestations of tendonopathy of the shin triceps tendons in individuals with various pathologies are shown.Тендинопатия сухожилия трицепса голени характеризуется разнообразием клинических и нозологических проявлений, наличием сочетанных форм, неспецифических симптомов, что затрудняет диагностику. Глубокий клинический анализ, использование современных методов функциональной и лучевой диагностики, таких как ультразвуковая диагностика и магнитно-резонансная томография, позволяют еще на ранних этапах диагностировать патологию ахиллова сухожилия. В данном литературном обзоре описаны основные причины изменений ахилловых сухожилий у  лиц различного возраста, их клинические проявления. Рассмотрены наиболее часто используемые методики лучевой диагностики: ультразвуковая диагностика ахиллова сухожилия, ультразвуковая соноэластография, технология визуализации акустического излучения силы импульса, магнитно-резонансная томография голеностопного сустава. Показаны основные функциональные и лучевые проявления тендинопатии сухожилий трицепса голени у лиц с различными патологиями

Reação adaptativa do sistema simpático de adrenalina de meninas em atividade física

The study of the functional state of the sympatho-adrenal system in girls of 11-16 years old undergoing graduated physical activity was performed on the basis of excretion rates of epinephrine, norepinephrine, dopamine and DOPA. As a functional test, a graduated cycloergometric load of 50% of the individually determined PWC170 was used. The results obtained made it possible to establish the heterochronic nature of the maturation of the hormonal and mediator links of the sympathetic adrenal system. The highest reactivity of the adrenal link of SAS is observed in girls of 12 years old, the lowest – in senior schoolgirls (15-16 years old). In girls of 12-13 years old, the reaction of urgent adaptation to the graduated physical activity is carried out against a background of high excretion of epinephrine (E), norepinephrine (NE), but without sufficient replenishment of the reserve capabilities of SAS, which is confirmed by minimal shifts in the excretion of dopamine (DA) and DOPA in these age groups. At 14-16 years, moderate shifts of E and NE as a reaction to activity are noted against the background of a significant increase in the excretion of precursors, which characterizes the SAS response to the functional test as more saving, with increasing reserve capacities.El estudio del estado funcional del sistema simpato-adrenal en niñas de 11-16 años sometidas a actividad física graduada se realizó sobre la base de las tasas de excreción de epinefrina, norepinefrina, dopamina y DOPA. Como prueba funcional, se utilizó una carga cicloergométrica graduada del 50% de la PWC170 determinada individualmente. Los resultados obtenidos permitieron establecer la naturaleza heterócrona de la maduración de los enlaces hormonales y mediadores del sistema adrenal simpático. La mayor reactividad del enlace suprarrenal de SAS se observa en niñas de 12 años, la más baja - en niñas de escuela secundaria (15-16 años). En niñas de 12-13 años de edad, la reacción de adaptación urgente a la actividad física gradual se lleva a cabo en un contexto de alta excreción de epinefrina (E), norepinefrina (NE), pero sin un reabastecimiento suficiente de las capacidades de reserva de SAS. que se confirma por cambios mínimos en la excreción de dopamina (DA) y DOPA en estos grupos de edad. A los 14-16 años, se observan cambios moderados de E y NE como reacción a la actividad en el contexto de un aumento significativo en la excreción de precursores, que caracteriza la respuesta SAS a la prueba funcional como más ahorro, con el aumento de la capacidad de reserva.O estudo do estado funcional das raparigas do sistema simpático-envelhecido 11-16 anos, submetidos a actividade física realizada classificados com base em taxas de excreção de epinefrina, norepinefrina, dopamina e DOPA. Como teste funcional, utilizou-se uma carga cicloergométrica graduada de 50% do PWC170 individualmente determinado. Os resultados obtidos permitiram estabelecer a natureza heterocrônica da maturação dos laços hormonais e mediadores do sistema adrenal simpático. A reatividade mais alta do elo adrenal de SAS observa-se em meninas de 12 anos, o mais baixo - em meninas de escola secundária (15-16 anos). Em raparigas com idades entre 12-13, reacção urgente de adaptação gradual da actividade física ocorre em um contexto de elevada excreção de adrenalina (E), norepinefrina (NE), mas sem capacidades de reabastecimento suficientes Reserva SAS. o que é confirmado por alterações mínimas na excreção de dopamina (DA) e DOPA nestes grupos etários. Aos 14-16 anos, E e NE variações moderadas em resposta à actividade no contexto de um aumento significativo da excreção de precursores, o que caracteriza a resposta SAS para um teste funcional, mais economia, com o aumento observado a capacidade de reserva