Global Study of Nuclear Structure Functions

We present the results of a phenomenological study of unpolarized nuclear structure functions for a wide kinematical region of x and Q^2. As a basis of our phenomenology we develop a model which takes into account a number of different nuclear effects including nuclear shadowing, Fermi motion and binding, nuclear pion excess and off-shell correction to bound nucleon structure functions. Within this approach we perform a statistical analysis of available data on the ratio of the nuclear structure functions F_2 for different nuclei in the range from the deuteron to the lead. We express the off-shell effect and the effective scattering amplitude describing nuclear shadowing in terms of few parameters which are common to all nuclei and have a clear physical interpretation. The parameters are then extracted from statistical analysis of data. As a result, we obtain an excellent overall agreement between our calculations and data in the entire kinematical region of x and Q^2. We discuss a number of applications of our model which include the calculation of the deuteron structure functions, nuclear valence and sea quark distributions and nuclear structure functions for neutrino charged-current scattering.Comment: 67 pages, 18 figures (v3: updated text and references, a new section with discussion about relation between off-shell effect and modification of the nucleon size in nuclei, accepted for publication in Nucl. Phys. A

Relativistic Three-Nucleon Calculations within the Bethe-Salpeter Approach

The relativistic properties of the three-nucleon system are investigated using the Faddeev equations within the Bethe-Salpeter approach. The nucleon-nucleon interaction is chosen in a separable form. The Gauss quadrature method is used to calculate the integrals. The system of the integral equations is solved by an iterative method. The binding energy and the partial-wave amplitudes (1S0 and 3S1) of the triton are found

МЕТОД ЛОКАЛЬНОГО ФИБРИНОЛИЗА В ХИРУРГИИ НЕТРАВМАТИЧЕСКИХ ВНУТРИЧЕРЕПНЫХ КРОВОИЗЛИЯНИЙ

More than 70% of hypertensive hemorrhages are located in deep brain structures. The removal of such hematomas using encephalotomy is accompanied by additional cerebral trauma and often results in unsatisfactory outcomes. The puncture aspiration with local fibrinolysis is one of the minimal invasive methods for treatment of intracerebral hematomas (ICH). The puncture and aspiration of liquid part of ICH (not more than 20% of ICH volume) is performed via small burr hole. Afterward the catheter is placed into ICH cavity and fibrinolytic is injected via this catheter in postoperative period for lysis of ICH solid part. The lysed blood is aspirated within 1-4 days. The last generations of fibrinolytics are very effective concerning intensity of blood clot lysis and practically have no systematic effect on blood coagulation system during their local usage. Morphological examinations showed that usage of fibrinolysis leads to formation of smaller cysts in the region of former hematoma as well as reparative processes in perihemorrhagical zone are expressed better comparing with treatment methods without usage of fibrinolytics. The morphological pattern is also confirmed by clinical signs of neurological deficit regress corresponding to damage focus. We operated 124 patients with parenchymal hemorrhages and 28 patients with intraventricular hemorrhages using described minimally invasive method at the base of Scientific Research Institute of Emergency Care n.a. N.V. Sklifosovsky. The applied method allowed decreasing lethality from 35% to 21% among patients with parenchymal ICH and from 98% to 48% - among patients with ventricular hemotamponade underwent usage of ventricular drainage combined with local fibrinolysis.   Более 70% гипертензивных кровоизлияний располагаются в глубинных отделах головного мозга. Удаление этих гематом путем энцефалотомии сопровождается дополнительной травматизацией мозга, и часто неудовлетворительными результатами. Одним из малотравматичных методов эвакуации внутримозговых гематом (ВМГ) является пункционная аспирация и локальный фибринолиз. Через небольшое трепанационное отверстие ВМГ пунктируют и аспирируют жидкую часть, которая составляет не более 20%. В полости гематомы оставляют катетер, через который в послеоперационном периоде вводят фибринолитик, растворяющий плотную часть гематомы. Лизированную кровь аспирируют в течение 1-4 суток. Последние поколения фибринолитиков очень эффективны в плане интенсивности растворения сгустка крови и практически не обладают системным воздействием на свертывающую систему крови при локальном применении. Морфологические исследования показали, что при использовании фибринолиза в области бывшей гематомы формируется киста меньшего размера, а репаративные процессы в зоне, окружающей гематому, выражены лучше, чем в случаях лечения без использования фибринолитиков. Морфологическая картина соответствует и клиническим данным о регрессе неврологической симптоматики, соответствующей очагу поражения. В институте скорой помощи им. Н.В. Склифосовского прооперированы 124 пациента с паренхиматозными кровоизлияниями и 28 – с вентрикулярными. Метод позволил снизить летальность с 35 до 21%  при паренхиматозных ВМГ и с 98 до 48%  при сочетании дренирования желудочков с локальным фибринолизом у больных с вентрикулярной гемотампонадой. 

Orientation teachers of physical education for improve own health

Purpose . The features targeted pedagogical influence on students of the Faculty of Physical Education to strengthen their own health. Material and methods . The study involved 192 students of different pedagogical university faculties of both sexes aged 18-21 years. Results . Revealed that the level of health is not very different Arts Students from the students of the Faculty of Physical Education and is the most "below average". In the process of training future teachers of physical culture introduced pedagogical conditions : enriching the content of academic disciplines of scientific information and educational support during the implementation of the rehabilitation program students. Found that as a result of research indicators of physical health of students of physical education have improved significantly. Conclusions . These data indicate the feasibility and necessity of using these pedagogical conditions in the orientation of the future teachers of physical training to strengthen their own health and the health of the younger generation

Effect of Crab cavity HOMs on the coupled-bunch stability of HL-LHC

High frequency High Order Modes can significantly affect the coupled-bunch stability in a circular accelerator. With a large enough shunt impedance they may drive a coupled-bunch transverse instability. We have developed an analytical model and implemented it in the NHT Vlasov solver. The results show that the instability is characterized by the excitation of many azimuthal intra-bunch modes, which have similar growth rates, that make the traditional remedies such as a flat resistive feedback and chromaticity inefficient in suppressing it. For the High Luminosity Large Hadron Collider this could result in a significant increase of the stabilizing Landau octupole current, up to $\sim 100$ A ($\sim 20\%$ of the maximum available current). In order to limit the increase below 10 A ($\sim 2\%$), the transverse shunt impedance has to be kept below 1 M$\Omega$/m.High frequency high order modes can significantly affect the coupled-bunch stability in a circular accelerator. With a large enough shunt impedance they may drive a coupled-bunch transverse instability. We have developed an analytical model and implemented it in the nested head-tail Vlasov solver. The results show that the instability is characterized by the excitation of many azimuthal intrabunch modes, which have similar growth rates, that make the traditional remedies such as a flat resistive feedback and chromaticity inefficient in suppressing it. For the High Luminosity Large Hadron Collider this could result in a significant increase of the stabilizing Landau octupole current, up to ∼100 A (∼20% of the maximum available current). In order to limit the increase below 10 A (∼2%), the transverse shunt impedance has to be kept below 1  MΩ/m

Dolerites of Svalbard, north-west Barents Sea Shelf: age, tectonic setting and significance for geotectonic interpretation of the High-Arctic Large Igneous Province

The dolerites of Svalbard are mineralogically and geochemically homogeneous with geochemical features typical of continental within-plate tholeiites. Their geochemistry is similar to tholeiites belonging to a bimodal suite defined as the High-Arctic Large Igneous Province (HALIP). K–Ar dating of numerous dolerites sampled from many locations across Svalbard define a narrow time span of this magmatism from 125.5±3.6 to 78.3±2.6 Mya. Discrete peaks of intensive activity occurred at 115.3, 100.8, 91.3 and 78.5 Mya corresponding to (1) breakup of the continental crust and formation of an initial rift as a result of mantle plume activity, located in the southern part of the Alpha Ridge; (2) magmatic activity related to spreading along the Alpha Ridge that led to the development of the initial oceanic crust and (3) continuation of spreading along the Alpha Ridge and termination of magmatic activity related to HALIP (last two peaks at 91.3 and 78.5 Mya)