Deformation behaviour of aluminium nanocrystals under shock-wave loading

Nonequilibrium process of shock-wave loading of aluminum nanocrystals were investigated numerically under uniaxial stress conditions using molecular dynamics simulations (MD). Deformation curves, time dependence of strain rate and the change in potential energy were constructed. Calculated properties of aluminium using embedded atom interatomic potential are compared with each other. Relationship between the calculated characteristics are discussed. The behaviour of deformation curves for two different aluminium nanosrystals is explained. The problems of modeling the deformation hardening of aluminum nanocrystals are considered. © 2019 Published under licence by IOP Publishing Ltd

Bandwidth-controlled Mott transition in κ−(BEDT−TTF)2Cu[N(CN)2]BrxCl1−x\kappa-(BEDT-TTF)_2 Cu [N(CN)_2] Br_x Cl_{1-x} I. Optical studies of localized charge excitations

Infrared reflection measurements of the half-filled two-dimensional organic conductors $\kappa$-(BEDT-TTF)$_2$Cu[N(CN)$_{2}$]Br$_{x}$Cl$_{1-x}$ were performed as a function of temperature ($5 {\rm K}<T<300$ K) and Br-substitution ($x=0$, 40%, 73%, 85%, and 90%) in order to study the metal-insulator transition. We can distinguish absorption processes due to itinerant and localized charge carriers. The broad mid-infrared absorption has two contributions: transitions between the two Hubbard bands and intradimer excitations from the charges localized on the (BEDT-TTF)$_2$ dimer. Since the latter couple to intramolecular vibrations of BEDT-TTF, the analysis of both electronic and vibrational features provides a tool to disentangle these contributions and to follow their temperature and electronic-correlations dependence. Calculations based on the cluster model support our interpretation.Comment: 12 pages, 12 figure

Higher and continuing education of both classical and digital craftsmen

The articles deals with historical and modern aspects of artistic education for craftsmen and it’s future after the digital revolutionВ статье рассматривается исторический и современный аспект получения образования художниками ремесленных профилей и перспективы его развития во времена «цифровой» революци

Differentiation of the regions of the central federal district of the Russian Federation according to the level of competitive advantages

The article reveals the methodology of competitive positioning of the regions, based on the clustering of the initial key competitive indicators, including those reflecting the regional resource potentia

Development of the Russian economy in a trend of current trends of technological effectiveness and knowledge intensity

A research objective is the analysis of the development of the Russian economy in a trend of current trends of technological effectiveness and knowledge intensity and establishment of a problem of the use of the human capital in the hi-tech enterprises of the industry of Russi

Monitoring of the morphologic reconstruction of deposited ablation products in laser irradiation of silicon

Using electron microscopy, atomic force microscopy, X-ray microanalysis, and IR spectroscopy, it was established that, in the regime of continuous laser irradiation of silicon at P = 170 W in different gaseous atmospheres with an oxygen impurity, SiOx composite films with a complex morphology form. The main components of ablation products are clusters that form during flight of ablation products and as a result of separation of SiOx-clusters from the zone of the irradiation channel. The roughness and density of the films depend on the heating temperature of the target surface and the type of deposited clusters

A social portrait of the Russian trainer

The purposes of this paper are to survey Russian trainers to create a social portrait of the professional group and to identify features, which could be arranged as a foothold for transforming this group to a new level given the demands of the modern economy. This study integrates the use of quantitative and qualitative social research strategies to obtain, aggregate, and analyze data characterizing the professional group of trainers in the Russian vocational education and training (VET) system. The basic research was provided by questionnaires in all federal districts (as recognized by international law) of the Russian Federation. The quantitative poll of trainers was conducted by representative two-level sampling. A number of tables and charts provide a social portrait of the Russian trainer. The statistical data reveal the current level of trainers’ education as well as their length of service, distribution of vocations, and other significant features. The overall conclusion from these findings indicates that a typical representative of this professional group is a woman of average or slightly advanced age with a family, who has a VET or higher education, has served as a training officer for not less than 10 years, and who has either been recruited as a highly skilled worker or as a specialist. A typical representative feels the need to change something in the life and teaching of the young people that she knows. The research into trainers as a professional group was conducted first because of their uniformity, and secondly, their typicality as a pedagogical group. In many respects, the main characteristics of the social portrait are similar to characteristics of other professional groups in the Russian education system, such as secondary and post-secondary school teachers, and VET teachers. The study is based on one country. It is the first and only survey of its type in the Russian Federation. The paper provides a unique analysis of the situation with trainers in the VET system of the Russian Federation. © 2016 Kopnov et al

The layer by layer selective laser synthesis of ruby

In the work, features of the layer-by-layer selective laser synthesis (SLS) of ruby from an Al2O3-Cr2O3 mixture are considered depending on the irradiation power, the laser beam traverse speed, the height and amount of the backfill of powder layers. It has been established that, under irradiation, a track consisting of polycrystalline textured ruby forms. The morphology of the surface of the track and its crystalline structure are determined by the irradiation conditions

On the Necessity and Possibility of Introducing Self-Driving Systems in an Urban Environment

This article analyses the possibility of using self-driving systems in the field of public transport. In this study, the type of public transport considered is the tram. Today, self-driving innovative technologies are becoming publicly available. It is shown that in the field of modernization of the artificial intelligence of the tram, maximum practical experience is needed to improve its adaptation to various external situations. The study suggests the practical application of self-driving systems in a city with a population of 1.5 million people. This city is Yekaterinburg, Russia. The best world experience in the field of automation of public transport processes is considered. The article also provides an algorithm for the introduction of self-driving systems into the urban environment. The advantages and disadvantages of the existing and modernized tram fleet are shown on the example of the city of Yekaterinburg. SWOT analysis was used as a tool for assessing the need and possibility of introducing a tram. © 2022 Institute of Physics Publishing. All rights reserved.Solovev D.B.Petukhov V.Bekker A

Dermatoscopic Pattern in Children with Microsporia and Pityriasis rosea

The present work includes a literature review and own investigations of dermatoscopic patterns of microsporia on the skin and pityriasis rosea in children. The method to investigate differential diagnosis between microsporia of the skin and the pityriasis rosea in children was the goal of the manuscript. Dermatoscopic examination of skin lesions is performed in 120 children using the manual contact dermatoscope (Heine Delta 20). In microsporia of the skin following dermatoscopic patterns were found: erythema without vessels in 56 patients (98.2%), white round spots (micro pustules compatible) at 30 examinees (52.6%), brown spots surrounded by a white-yellow halo with loss of vellus hairs were found in 50 children (87.7%), rough scales with chaotic distribution were detectable in 55 of 57 patients with microsporia (96.5%). In the following pityriasis rosea dermatoscopic signs were observed: a yellowish background at 60 children (95,2%), linear irregular vessels in 55 patients (87.3%), thin scales, located on the periphery “lace collar” in 59 of 63 surveyed (93.6%). Typical diagnostic patterns of the skin microsporia and pityriasis rosea in children were found. In the case of the microsporia of the skin, the diagnostic procedure supported the assessment of the involvement of vellus hairs and a timely prescription of systemic antifungal therapy, which shortens the duration of therapy.Die vorliegende Arbeit umfasst eine Literaturrecherche und eigene Untersuchungen der dermatoskopischen Muster der Mikrosporie an der Haut und der Pityriasis rosea bei Kindern. Es war Ziel des Manuskripts, die Verfahren zur Differenzialdiagnostik zwischen Mikrosporie der Haut und der Pityriasis rosea bei Kindern zu untersuchen. Eine dermatoskopische Untersuchung der Läsionen der Haut erfolgt bei 120 Kindern unter Anwendung des manuellen Kontaktdermatoskops (Heine Delta 20). Bei Mikrosporie der Haut wurden folgende dermatoskopische Muster gefunden: ein Erythem ohne Gefäße bei 56 Patienten (98,2%), weiße rundliche Flecken (mit Mikropusteln vereinbar) bei 30 Untersuchten (52,6%), braune Flecken umgeben von einem weiß-gelben Halo mit Verlust von Vellushärchen fanden sich bei 50 Kindern (87,7%), grobe Schuppen mit chaotischer Verteilung waren bei 55 von 57 der Patienten mit einer Mikrosporie (96,5%) nachweisbar. Bei der Pityriasis rosea wurden folgende dermatoskopische Zeichen festgestellt: ein gelblicher Hintergrund bei 60 Kindern (95,2%), lineare irreguläre Gefäße bei 55 Patienten (87,3%), dünne Schuppen, an der Peripherie gelegen als Spitzenkragen bei 59 von 63 Untersuchungspersonen (93,6%). Es wurden typische diagnostische Muster der Mikrosporie der Haut und der Pityriasis rosea bei Kindern festgestellt. Bei der Mikrosporie der Haut unterstützte das diagnostische Verfahren die Einschätzung der Beteiligung von Vellushärchen und eine rechtzeitige Verordnung der systemischen antimykotischen Therapie, was die Therapiedauer Verkürzt