Nonlocal symmetries of integrable two-field divergent evolutionary systems

Nonlocal symmetries for exactly integrable two-field evolutionary systems of the third order have been computed. Differentiation of the nonlocal symmetries with respect to spatial variable gives a few nonevolutionary systems for each evolutionary system. Zero curvature representations for some new nonevolution systems are presented

Portuguese military discourse in Brazil

This article considers Portuguese military discourse in Brazil, and also the material, which is essential while teaching Portuguese to military interpreters. The history of the replenishment of an all-Portuguese militarytechnical lexicon is presented here. The most important periods of formation of Portuguese military discourse in Portuguese-speaking countries is considered. The influence of loanwords on all-Portuguese military-technical lexicon is described

Production of para-- and orthopositronium at relativistic heavy ion colliders

We consider the ortho-- and parapositronium production in the process $AA \to AA+$ Ps where A is a nucleus with the charge number Z. The inclusive cross section and the energy distribution of the relativistic Ps are calculated which are of primary interest from the experimental point of view. The accuracy of the corresponding cross sections is given by omitting terms $\sim (Z\alpha )^2/L^2$ for the para--Ps and $\sim (Z\alpha)^2/L$ for the ortho--Ps production where $L=\ln{\gamma^2} \approx 9$ and 16 for the RHIC and the LHC. Within this accuracy the multiphoton (Coulomb) corrections are taken into account. We show that the RHIC and the LHC will be Ps factories with a productions rate of about $10^5 \div 10^8$ relativistic Ps per day. The fraction of the ortho--Ps is expected to be of the same order as that of the para--Ps for Au--Au and Pb--Pb collisions.Comment: 22 pages, 5 figures, RevTeX, misprint correcte

Smart educational multifunctional audience

The article discusses the prospects for creating a smart multifunctional classroom at the Department of Information Systems and Technologies of the Institute of Engineering and Pedagogical Education "Russian State Vocational Pedagogical University»В статье рассматривается перспективы создания умной многофункциональной учебной аудитории на базе кафедры информационных систем и технологий института инженерно-педагогического образования «Российского государственного профессионально-педагогического университета