On extending actions of groups

Problems of dense and closed extension of actions of compact transformation groups are solved. The method developed in the paper is applied to problems of extension of equivariant maps and of construction of equivariant compactifications

Spectral multiplicity for powers of weakly mixing automorphisms

We study the behavior of maximal multiplicities $mm (R^n)$ for the powers of a weakly mixing automorphism $R$. For some special infinite set $A$ we show the existence of a weakly mixing rank-one automorphism $R$ such that $mm (R^n)=n$ and $mm(R^{n+1}) =1$ for all $n\in A$. Moreover, the cardinality $cardm(R^n)$ of the set of spectral multiplicities for $R^n$ is not bounded. We have $cardm(R^{n+1})=1$ and $cardm(R^n)=2^{m(n)}$, $m(n)\to\infty$, $n\in A$. We also construct another weakly mixing automorphism $R$ with the following properties: $mm(R^{n}) =n$ for $n=1,2,3,..., 2009, 2010$ but $mm(T^{2011}) =1$, all powers $(R^{n})$ have homogeneous spectrum, and the set of limit points of the sequence $\{\frac{mm (R^n)}{n} : n\in \N \}$ is infinite

DEVELOPMENT OF A MODEL FOR THE PRODUCTION OF METAL-POWDER COMPOSITIONS BASED ON CO-CR ALLOYS BY ELECTROEROSIVE DISPERSION

Abstract. The main requirement for powders for additive 3d technologies is the spherical shape of theparticles. Such particles are most compactly packed into a certain volume and ensure the "fluidity" of the powder composition in the supply systems of the material with minimal resistance. The wide use of the EED method for processing metal waste into powders for the purpose of their reuse and application in additive technologies is hampered by the lack in the scientific and technical literature of full-fledged information on the effect of the initial composition, regimes and media on the properties of powders and technologies of practical application. Therefore, in order to develop technologies for the reuse of electroerosive powders and to evaluate the effectiveness of their use, complex theoretical and experimental studies are required. The aim of the work was to develop a model for the production of metal powder compositions on the basis of Co-Cr alloys by electroerosive dispersion. Based on the results of the conducted studies, it has been established that the optimum parameters for the process of obtaining powder materials by the method of electroerosive dispersion of butyl alcohol are: capacitance of discharge capacitors 48 μF, voltage on electrodes 100 V, repetition rate of pulses 120 Hz

Dynamics of СО2 evolution bу plants at low pressure

Dynamics of СО2 evolut:ion at low pressure was studied in barley, maize, реа, wheat and pine seedlings using the gas exchange system with laser photoacoust:ic spectrometer. The СО2 evolut:ion from plant surfaces to environment increased with decreasing air pressure. Simultaneously the changes in act:ivities of phosphoenolpyruvat

Способ паллиативного лечения распространенных форм рака легкого

We have proposed a palliative method for common forms of lung cancer, which combines the two previously mentioned methods. Using this method allows not only to stop the lung bleeding, but restore airway passage of the bronchi and then continue with the treatment of lung cancer (chemotherapy, radiotherapy). We used this method in 16 patients with age group from 54 to 76 years, with central lung cancer III A–IV stages, who had lung hemorrhage and atelectasis of bronchus. In the first step, rentgenendovascular embolization of bronchial artery (REVEBA) and their branches approaching to the tumor is performed. In the next stage, the patients underwent laser recanalization of tumor stenosis of the segmental or main bronchi. We were able to achieve a positive hemostatic effect in 15 patients, which was seen throughout first 5 months. Recanalization and restoration of the bronchial airway was achieved in all the patients. All these factors allowed the patients undergo subsequent radiation and chemotherapy. Tumor relapse, recurrence of stenosis and pulmonary bleeding have not been observed during the first 5 months. Possibilities of using the adove mentioned methods in the treatment of common forms of lung cancer have been shown.Нами предложен способ паллиативного лечения распространенных форм рака лёгкого, который объединяет две ранее указанные методики. Применение данного способа позволяет не только остановить легочное кровотечение и восстановить проходимость бронха, но и в дальнейшем продолжить лечение рака легкого (химиотерапия, лучевая терапия). Данный способ применен нами у 16 пациентов с центральным раком легкого III A–IV ст., у которых было легочное кровотечение и ателектаз бронха. Первым этапом выполнялась рентгенэндоваскулярная эмболизация бронхиальных артерий и их ветвей, подходящих к опухоли. Следующим этапом была лазерная реканализация опухолевых стенозов бронхов. Нам удалось добиться положительного гемостатического эффекта у 15 пациентов (стойкий гемостаз отмечался на протяжении 5 мес.), а также реканализации бронхов у всех пациентов. Все это позволило нашим пациентам в последующем пройти лучевую либо химиотерапию. За 5-месячный период наблюдения рецидив опухолевого стеноза и повторные легочные кровотечения нами не наблюдались. Показана возможность использования метода в лечении осложненных форм злокачественных опухолей легкого

Social networking as an advertising tool in Russia and abroad

This study contrasts the behavioural patterns of users on Facebook with those on VKontakte using data collected by Facebook and a survey of Russian VKontakte users. The authors analyse the key differences between the two popular social networks, including what users perceived to be the most attractive options, the amount of time spent online and attitudes toward advertising. The results have been used to evaluate the potential of social networks (SMM) for business promotion in Russia

Efficacy of liposomal dosage forms and hyperosmolar salines in experimental pharmacotherapy of acute lung injury

Hypertonic sodium chloride solutions and liposomal drugs with pulmotropic effect are of great interest for the treatment of acute lung injury (ALI). For the experiment, liposomes with dexamethasone, N-acetylcysteine (NAC), aprotinin and dye Cyanine-7 (Cy-7) were obtained. A liposome analysis was performed by means of spectrophotometry. ALI was modeled in rats by the administration of the damaging agents into the trachea. All the studied therapeutic agents increased the survival rate of the laboratory animals with ALI. The most effective experimental agent was liposomal dexamethason

Vector Meson Production in Ultraperipheral Heavy Ion Collisions

The ultraperipheral heavy ion collisions (UPC's) are an important alternative to study the QCD dynamics until the next generation of $e^+e^-/ ep / eA$ colliders become reality. Due to the coherent action of all the protons in the nucleus, the electromagnetic field is very strong and the resulting flux of equivalent photons is large, which allows to study two-photon as well as photonuclear interactions at high energies. In this paper we present a brief review of the vector meson production in UPC's at high energies using the QCD color dipole approach to describe their photonuclear production and the perturbative QCD Pomeron (BFKL dynamics) to describe the double meson production in photon-photon process. Predictions for rates and integrated cross sections are presented for energies of RHIC and LHC.Comment: 16 pages, 1 figure. Version to be published in Journal of Physics G: Nuclear and Particle Physic

Method of detection of dexamethasone in biological tissues and its application to assess the local kinetics of this drug

Preliminary findings indicate that the liposomal form of dexamethasone may exhibit better pharmacokinetic properties than the water-soluble form, which could lead to improved therapeutic outcome