The Effects of Electronic Media on Children

Nowadays, mobile phone, the Internet, mp3 player are important parts of our lives. They have a great influence over all age groups. Gadget dependency especially concerns children who are affected a lot by all kinds of modern devices: they listen to loud music on headphones, watch cartoon close to the screen and spend too much time playing video games. Thus, digital addiction of children is becoming an issue of increasing importance we can not just dismiss

Динамика содержания тяжелых металлов в сырье для получения сердечных гликозидов на примере CONVALLARIA MAJALIS L

Для подтверждения нашей гипотезы о связи географии онкологических заболеваний с содержанием на территориях тяжелых металлов, мы начали изучать их содержание в лекарственных растениях, в частности, в CONVALLARIA MAJALIS L

Динамика содержания тяжелых металлов в сырье для получения сердечных гликозидов на примере CONVALLARIA MAJALIS L

Для подтверждения нашей гипотезы о связи географии онкологических заболеваний с содержанием на территориях тяжелых металлов, мы начали изучать их содержание в лекарственных растениях, в частности, в CONVALLARIA MAJALIS L

Fast recognition of marine particles in underwater digital holography

The issue of fast recognition of marine particles in situ by digital holography methods is considered. An algorithm for the classification of marine particles by morphological features is proposed. Preliminary results and estimation of accuracy of the proposed algorithm are presented

SEMANTIC ANALYSIS OF COMPOUND WORDS AND THEIR TRANSFORMATIONS AS AN IMPORTANT COMPONENT IN FOREIGN LANGUAGE COMPETENCE FORMATION

The article investigates the word formation system of modern English. The authors of the article are trying to identify new, modern trends of word formation that have been tracing for the last decades. In addition, an attempt is made to differentiate theoretical material, which is to be introduced more actively into training programs for the development of foreign language competence. The basic criteria of a compound word have been determined and the degree of word formation importance in the English vocabulary replenishment has been identified. A thorough analysis of contemporary research and publications conducted by the authors of the article shows that the issue of semantic analysis of compound words and their transformations is still being explored by foreign and domestic scientists, which indicates the relevance of the chosen topic.Key words: semantic analysis, word formation, compound words, transformations, derived words, morphology, language competence.

Stable multiple-charged localized optical vortices in cubic-quintic nonlinear media

The stability of two-dimensional bright vortex solitons in a media with focusing cubic and defocusing quintic nonlinearities is investigated analytically and numerically. It is proved that above some critical beam powers not only one- and two-charged but also multiple-charged stable vortex solitons do exist. A vortex soliton occurs robust with respect to symmetry-breaking modulational instability in the self-defocusing regime provided that its radial profile becomes flattened, so that a self-trapped wave beam gets a pronounced surface. It is demonstrated that the dynamics of a slightly perturbed stable vortex soliton resembles an oscillation of a liquid stream having a surface tension. Using the idea of sustaining effective surface tension for spatial vortex soliton in a media with competing nonlinearities the explanation of a suppression of the modulational instability is proposed.Comment: 4 pages, 3 figures. Submitted to Journal of Optics A. The proceedings of the workshop NATO ARW, Kiev 2003 Singular Optics 200

H-T Phase Diagram of Rare-Earth -- Transition Metal Alloy in the Vicinity of the Compensation Point

Anomalous hysteresis loops of ferrimagnetic amorphous alloys in high magnetic field and in the vicinity of the compensation temperature have so far been explained by sample inhomogeneities. We obtain H-T magnetic phase diagram for ferrimagnetic GdFeCo alloy using a two-sublattice model in the paramagnetic rare-earth ion approximation and taking into account rare-earth (Gd) magnetic anisotropy. It is shown that if the magnetic anisotropy of the $f$-sublattice is larger than that of the $d$-sublattice, the tricritical point can be at higher temperature than the compensation point. The obtained phase diagram explains the observed anomalous hysteresis loops as a result of high-field magnetic phase transition, the order of which changes with temperature. It also implies that in the vicinity of the magnetic compensation point the shape of magnetic hysteresis loop is strongly temperature dependent.Comment: 8 pages, 3 figure