Рroblem of Student’s Physical Health as Well as to Sanitary Measures that Take Place in the Educational Process of Students.

Висвітлено проблему фізичного здоров’я студентів та оздоровчі заходи в супроводі навчання студентів. Проблема фізичного здоров’я полягає у порушенні адаптивного потенціалу системи кровообігу, що пов’язано з неправильним способом життя. This article is devoted to the problem of student’s physical health as well as to sanitary measures that take place in the educational process of students. The problems of physical health lie in the breach of blood circulation adaptable that is connected with unhealthy way of life

GARFIELD + RCo Digital Upgrade: a Modern Set-up for Mass and Charge Identification of Heavy Ion Reaction Products

An upgraded GARFIELD + Ring Counter (RCo) apparatus is presented with improved performances as far as electronics and detectors are concerned. On one side fast sampling digital read out has been extended to all detectors, allowing for an important simplification of the signal processing chain together with an enriched extracted information. On the other side a relevant improvement has been made in the forward part of the setup (RCo): an increased granularity of the CsI(Tl) crystals and a higher homogeneity in the silicon detector resistivity. The renewed performances of the GARFIELD + RCo array make it suitable for nuclear reaction measurements both with stable and with Radioactive Ion Beams (RIB), like the ones foreseen for the SPES facility, where the Physics of Isospin can be studied.Comment: 13 pages, 19 figures - paper submitted to Eur. Phys. J.

Isotope analysis in central heavy ion collisions at intermediate energies

Symmetry energy is a key quantity in the study of the equation of state of asymmetric nuclear matter. Heavy ion collisions at low and intermediate energies, performed at Laboratori Nazionali di Legnaro and Laboratori Nazionali del Sud, can be used to extract information on the symmetry energy coefficient Csym, which is currently poorly known but relevant both for astrophysics and for structure of exotic nuclei.Comment: 2 pages, 1 figure. Proceedings of 7th International Conference on Radioactive Nuclear Beams (RNB7), to be published in The European Physical Journal

Системы и технологии пневматического золоудаления ТЭС

В Європейському союзі, США та інших розвинутих країнах світу зола електростанцій розглядається як техногенна сировина для багатьох галузей промисловості, яка утилізується до 92% в сухому вигляді, їх системи пневмозоловидалення є невід’ємною складовою технологічного процесу вугільних ТЕС. В Україні застосовуються системи гідрозоловидалення, і як наслідок, зола втрачає свої споживчі цінності щодо такого використання, а її накопичення на золовідвалах приводить до проблем землевідведення, забруднення грунту, водойм, атмосфери, запилення територій, можливості катастрофічних наслідків від прориву огородження дамб, рішенням яких є утилізація золи в сухому вигляді. В статті наведено порівняльний аналіз відомих систем пневмозоловидалення (за фазою щільності, характером транспортування, способу створення в трубопроводі різниці тиску), надано рекомендації щодо вибору обладнання та технологій, які отримали позитивну апробацію в світі. Їх використання на вугільних ТЕС України дозволить максимально утилізувати золу як цінний продукт, отримати прибуток від збуту, вирішувати проблеми охорони навколишнього середовища.In the European Union, the USA and other developed countries of the world the ashes of power plants are considered as technogenic raw materials for many industries, which are utilized to 92 % in a dry form; their systems of pneumatic ash handling are an integral part of technological process of coal-fired TPPs. In Ukraine the systems of hydraulic ash removal are applied and, as a consequence, ashes lose the consumer worth concerning such use, and its accumulation in ash dumps leads to land allotment problems, pollution of soil, ponds, atmosphere, pollination of territories, and possibility of catastrophic aftereffects from breakthrough of protections dams, which solution is the disposal of ash in dry form. The article presents a comparative analysis of the known systems of pneumatic ash handling (on the density phase, nature of the transportation, method of creating a pressure difference in a pipeline),the recommendations are given on the choice of equipment and technologies, which have obtained the positive approbation in the world. Their use in the coal-fired TPPs of Ukraine will allow to the maximum dispose of the ash as a valuable product, to obtain a profit from sales, and to solve problems of environmental protection.В Европейском союзе, США и других развитых странах мира зола электростанций рассматривается как техногенное сырье для многих отраслей промышленности, которая утилизируется до 92% в сухом виде, их системы пневмозолоудаления есть неотъемлемой составной технологического процесса угольных ТЭС. В Украине применяются системы гидрозолоудаления и, как следствие, зола теряет свои потребительские ценности относительно такого использования, а ее накопление на золоотвалах приводит к проблемам землеотвода, загрязнения грунту, водоемов, атмосферы, опыления территорий, возможности катастрофических следствий от прорыва ограждения дамб, решением которых является утилизация золы в сухом виде. В статье приведенный сравнительный анализ известных систем пневмозолоудаления (за фазой плотности, характером транспортировки, способа создания в трубопроводе разности давления), предоставлены рекомендации относительно выбора оборудования и технологий, которые получили положительную апробацию в мире. Их использование на угольных ТЭС Украины позволит максимально утилизировать золу как ценный продукт, получить прибыль от сбыта, решать проблемы охраны окружающей среды

Coupling between magnetic field and curvature in Heisenberg spins on surfaces with rotational symmetry

We study the nonlinear $\sigma$-model in an external magnetic field applied on curved surfaces with rotational symmetry. The Euler-Lagrange equations derived from the Hamiltonian yield the double sine-Gordon equation (DSG) provided the magnetic field is tuned with the curvature of the surface. A $2\pi$ skyrmion appears like a solution for this model and surface deformations are predicted at the sector where the spins point in the opposite direction to the magnetic field. We also study some specific examples by applying the model on three rotationally symmetric surfaces: the cylinder, the catenoid and the hyperboloid. The coupling between a magnetic field and the curvature of the substract is an interesting result and we believe that this issue may be relevant to be applied in condensed matter systems, e.g., superconductors, nematic liquid crystals, graphene and topological insulators.Comment: To be published in Physics Letters

Charged particle decay of hot and rotating 88^{88}Mo nuclei in fusion-evaporation reactions

A study of fusion-evaporation and (partly) fusion-fission channels for the $^{88}$Mo compound nucleus, produced at different excitation energies in the reaction $^{48}$Ti + $^{40}$Ca at 300, 450 and 600 MeV beam energies, is presented. Fusion-evaporation and fusion-fission cross sections have been extracted and compared with the existing systematics. Experimental data concerning light charged particles have been compared with the prediction of the statistical model in its implementation in the Gemini++ code, well suited even for high spin systems, in order to tune the main model parameters in a mass region not abundantly covered by exclusive experimental data. Multiplicities for light charged particles emitted in fusion evaporation events are also presented. Some discrepancies with respect to the prediction of the statistical model have been found for forward emitted $\alpha$-particles; they may be due both to pre-equilibrium emission and to reaction channels (such as Deep Inelastic Collisions, QuasiFission/QuasiFusion) different from the compound nucleus formation.Comment: 14 pages, 14 figure

PEN experiment: a precise measurement of the pi+ -> e+ nu decay branching fraction

A new measurement of $B_{\pi e2}$, the $\pi^+ \to e^+\nu(\gamma)$ decay branching ratio, is currently under way at the Paul Scherrer Institute. The present experimental result on $B_{\pi e2}$ constitutes the most accurate test of lepton universality available. The accuracy, however, still lags behind the theoretical precision by over an order of magnitude. Because of the large helicity suppression of the $\pi_{e2}$ decay, its branching ratio is susceptible to significant contributions from new physics, making this decay a particularly suitable subject of study.Comment: 4 pages, 3 figures, talk given at the Tenth Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2009), La Jolla/San Diego, CA, 26-31 May 2009; to appear in Proceedings to be published by the American Institute of Physic