Multiple Conclusion Rules in Logics with the Disjunction Property

We prove that for the intermediate logics with the disjunction property any basis of admissible rules can be reduced to a basis of admissible m-rules (multiple-conclusion rules), and every basis of admissible m-rules can be reduced to a basis of admissible rules. These results can be generalized to a broad class of logics including positive logic and its extensions, Johansson logic, normal extensions of S4, n-transitive logics and intuitionistic modal logics

Preliminary results of investigation of solid interplanetary matter in the vicinity of the moon

Density of matter near moon found to be greater than that of interplanetary spac

New type of stable particle like states in chiral magnets (Chiral bobbers)

We present a new type of a thermodynamically stable magnetic state at interfaces and surfaces of chiral magnets. The state is a soliton solution of micromagnetic equations localized in all three dimensions near a boundary and contains a singularity, but nevertheless has a finite energy. Both features combine to a quasi-particle state for which we expect unusual transport and dynamical properties. It exhibits high thermal stability and thereby can be considered as promising object for fundamental research and practical applications in spintronic devices. We provide arguments that such a state can be found in different B20-type alloys e.g. Mn$_{1-x}$Fe$_x$Ge, Mn$_{1-x}$Fe$_x$Si, Fe$_{1-x}$Co$_x$Si.Comment: accepted in PR

Electromagnetic levitation system

Magnetism is a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects. It is widely adopted in many spheres of our routine life. By using the effect of magnetism, it has become possible to create non-frictional bearings, contact-free shock absorbers and many things, which found their appliance in industrial usage. There are many great inventions connected with magnets, such as the train on the air cushion (Maglev train). Maglev stands for magnetic levitation, a principle that allows keeping an object in midair. This technology has a great potential, however there are always things, which need to be improved, for instance reduction of disturbance and lowering of the price

Миграционный кризис в Европейском Союзе: происхождение, особенности и меры противодействия

The present paper studies the mass and uncontrollable streams of migrants into the European Union (EU) starting from 2014. In scientific and public discourse, this phenomenon was called the “migratory crisis”. The paper analyzes the causes of forced migration from Africa and the Middle East, which is characterized both by national and global problems. The authors reveal the ambiguous position of EU member states with respect to the illegal migration and identify two basic approaches, which were formed in the course of political discussions concerning this crisis in the context of EU safety. In particular, the research shows the changes in the content of threats to the EU member states, caused by the uncontrollable migration in the recent decades. The article presents a survey of the fundamental characteristics of migratory crisis, the measures developed by the EU structures for its overcoming and the results of their implementation.El presente artículo estudia los flujos incontrolables y masivos de migrantes que viajan a la Unión Europea (UE) desde 2014. Tanto en el ámbito público como el científico, este fenómeno fue llamado “crisis migratoria”. Este documento analiza las causas que provocaron los movimientos migratorios desde África y Oriente Medio, las cuales tienen sus raíces tanto en problemas nacionales como globales. Asimismo, los autores revelan la posición ambigua de la UE con respecto a la inmigración ilegal, identificando dos principales enfoques que se crearon durante el desarrollo de discusiones políticas relativas a la crisis en el contexto de la seguridad en la UE. En particular, esta investigación muestra los cambios en forma de “amenazas” a los estados miembros de la UE provocados por la incontrolable migración de las últimas décadas. Este artículo también presenta un estudio de las características fundamentales de la crisis migratoria, las medidas adoptadas por las instituciones de la UE para afrontarla y los resultados que han tenido la implementación de las mismas.Este artigo estuda os fluxos incontroláveis e massivos de migrantes que viajam para a União Européia (UE) desde 2014. Nas duas esferas, pública e científica, esse fenômeno foi chamado de "crise migratória". Este documento analisa as causas que causaram os movimentos migratórios da África e do Oriente Médio, que têm suas raízes em problemas nacionais e globais. Além disso, os autores revelam a posição ambígua da UE no que diz respeito à imigração ilegal, identificando duas abordagens principais que foram criadas durante o desenvolvimento de discussões políticas relacionadas com a crise no contexto da segurança na UE. Em particular, esta pesquisa mostra as mudanças na forma de "ameaças" aos estados membros da UE causadas pela migração incontrolável das últimas décadas. Este artigo também apresenta um estudo sobre as características fundamentais da crise migratória, as medidas adotadas pelas instituições da UE para lidar com ela e os resultados da implementação da mesma.В настоящей работе рассматриваются массовые и неконтролируемые потоки мигрантов в Европейский союз (ЕС), начиная с 2014 года. В научном и общественном дискурсе это явление получило название "миграционный кризис". В статье анализируются причины вынужденной миграции из Африки и Ближнего Востока, которая характеризуется как национальными, так и глобальными проблемами. Авторы выявляют неоднозначную позицию государств-членов ЕС в отношении нелегальной миграции и выделяют два основных подхода, которые сформировались в ходе политических дискуссий относительно данного кризиса в контексте безопасности ЕС. В частности, исследование показывает изменения в содержании угроз для государств-членов ЕС, вызванные неконтролируемой миграцией за последние десятилетия. В статье представлен обзор фундаментальных характеристик миграционного кризиса, разработанных структурами ЕС мер по его преодолению и результатов их реализации

SU(2) Skyrme Vortices

A regular method for constructing vortex-like solutions with cylindrical symmetry to the equations of the SU(2) Skyrme chiral model is proposed. A numerical estimate for the length density of mass is given