Synthesis of Nanosized Oxides by Thermal Decomposition of Citrate Precursors

The paper describes the citric acid aided synthesis of single and mixed nanosized oxides of transition metals (Zn, Cu, Co, Ni, Mn, Ce). Thermal analysis is used for determining the composition of precursors and intermediates formed in the process of their pyrolysis and for finding minimal temperatures of the formation of oxide. All samples studied are found to be nanoporous materials with predominant mesoporosity. The greatest surface area is obtained for samples with metal to citric acid ratio as 1 : 2. Overviewing the results of porosity studies one can reach a conclusion regarding the optimal composition of the precursors for obtaining each of target materials of the best quality. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3513

Persuasive techniques in advertising

The article explores persuasive techniques employed in commercial advertising and linguistic devices used to realise them. This study views persuasive techniques as features of rhetoric used for expressing logos, ethos and pathos. Depending on the principle of argumentation employed, the techniques are classified into three groups: those pertaining to logical reasoning (logos), those presenting a positive image of the company (ethos), and those involving the emotional component (pathos). The authors provide a detailed description of the persuasive techniques identified in the course of the research and single out the corresponding linguistic devices. The corpus of materials for the analysis comprises authentic commercials and original scripts of sample advertisements recommended for advertising agencies. Statistical frequency of persuasive techniques is elaborated to identify and describe the universal persuasive technologies used in advertising. Awareness of persuasive techniques improves the quality of advertising that affects the recipient’s preferences and attitudes in a subtle way without limiting their freedom. The results of the study will prove useful for those involved in the advertising industry as well as for everyone interested in the issue

High-rate Electrochemical Performance of Nanosized LiNi0,5Mn1,5O4

Structural and electrochemical characteristics of nanosized LiNi0,5Mn1,5O4 synthesized by means of a citric acid aided route are presented. It is found that materials treated at 800 °C consist of the maximal amount of the disordered face-centered cubic phase. Galvanostatic discharge curves registered at various discharge currents (147-5800 mA·g – 1 or 1-40 C) prove the excellent high-rate performance of the samples studied. Specifically, the sample treated at 800 °С endures a load of 40 C delivering the reversible specific capacity of 34 mAh·g – 1. Such results have never been attained with LiNi0,5Mn1,5O4 electrodes prepared using standard techniques and overwhelms all existing data published to date. This remarkable result makes evident excellent prospects of non-solid-state routes for obtaining electrode materials for heavy-duty lithium-ion batteries of new generation. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3550

Simulations of equilibrium magnetic and magnetoelastic properties of non-conducting rare-earth compounds

The Hamiltonian of the magnetic subsystem containing rare-earth ions involves energies of the localized 4f-electrons in free ions, energies of interactions of the 4f-electrons with the static crystal field in the perfect crystal lattice as well as in the homogeneously deformed lattice, interactions with the external magnetic field and lattice vibrations (electron-phonon interaction), magnetic dipolar and exchange interactions between the ions. This Hamiltonian is used in calculations of different measurable physical parameters versus temperature and the magnetic field strength and direction (energy levels of rare earth ions, the magnetization, magnetic dc- and ac-susceptibilities, elastic constants, lattice deformations)

Clinical examples of the effective correction of low astigmatism for improving vision

I.V. Lobanova, E.G. Rybakova, T.B. Romanova Pirogov Russian National Research Medical University, Moscow, Russian Federation In today’s world, the extensive visual load increases the demands on the quality of optical correction. Inadequate optical correction results in additional load on the accommodation system of the eye, increased fatigue, and complaints of asthenopia. Full optical correction is an essential requirement for the correct functioning of a visual analyzer. However, if baseline impairments of accommodation response (fusion) are not considered, full optical correction (eyeglasses or contact lenses) provokes visual discomfort. Daily disposable contact lenses (CL) with power change for each additional month is helpful in these cases, thereby allowing for a stepwise transition to the complete correction of ametropias and recovery of physiological accommodation, convergence, and better central and binocular vision quality. Prescription of spherical (not toric) CL, whose optical power was calculated by the spherical equivalent of sphero-cylindrical correction, is a ty pical error when correcting low astigmatism. This error negatively affects accommodative response and visual working capacity. A complete correction of astigmatism (even a low one) is required for visual recovery to reduce visual fatigue and improve working capacity and academic performance. When prescribing optical correction, binocular vision patterns and a dominant eye should be considered. Keywords: astigmatism, accommodation, binocular vision, visual discomfort, asthenopia, toric soft contact lenses. For citation: Lobanova I.V., Rybakova E.G., Romanova T.B. Clinical examples of the effective correction of low astigmatism for improving vision. Russian Journal of Clinical Ophthalmology. 2021;21(4):249–252 (in Russ.). DOI: 10.32364/2311-7729-2021-21-4-249-252. <br

How to create individual educational trajectories in the informational educational environment

The article considers the issues of designing individual educational trajectories for University students in the informational educational environment from the perspective of personal-oriented, environmental and professionally oriented approaches. The leading research methods are comparative statistical analysis and modeling, the first of which helps to analyze quantitative data that reflect parameters that are important for students’ academic performance and progress in the information educational environment, while the latter allows to model linguistic profiles designed for the individual educational trajectories. The informational educational environment as a unit of the educational space of the discipline “Foreign language” is a set of the following components: resource, informational components and socio-methodological, subject-operational and didactic-methodological sub-components, as well as subject-activity and procedural components

Numerical modeling of multi-scale shear stability loss in polycrystals under shock wave loading

Presented in this paper is numerical modeling of polycrystalline aluminum behavior under the weak shock waves. Plastic deformation is considered as a process of shear stability loss on the different scale levels : micro, meso, and macro. A dislocation kinetics equation describes micro scale processes. For the meso scale deformation to be simulated we use two different models. One of them takes into account a generation of plastic shears on grain boundaries and the other allows us to describe "independent rotation" of mesofragments. On the macro level we calculate impact interaction the aluminum flyer plate with perfectly rigid wall. The results of 2D calculations are reported and discussed

CLINICAL STUDIES OF REACTOGENICITY, SAFETY AND IMMUNOGENICITY OF LIVE MONOVALENT INFLUENZA VACCINE (STRAIN А/17/CALIFORNIA/2009/38 — H1N1) IN CHILDREN

Results of performed pre-clinical and clinical studies with volunteers 18-60 years old allowed registration of vaccine «INFLUVIR» (live monovalent vaccine for the prophylaxis of influenza A/H1N1, strain A/17/California/2009/38 (H1N1), developed by NPO «Microgen» in Russian Federation so timely vaccination campaign was performed. As a result, the level of morbidity with influenza A/H1N1 in Russia was decreased, and development of complication was prevented. Clinical studies in different groups of children were performed for the purpose of widening indications for vaccine «INFLUVIR» administration. According to the results of studies vaccine «INFLUVIR» has good tolerability and safety, low reactogenicity, and significant immunogenicity. This fact will allow changing of present normative documentation and administration of «INFLUVIR» in children of different age for prophylaxis of influenza A/H1N1.Key words: children, influenza, virus A/H1N1, live influenza vaccine, tolerability, safety, immunogenicity.(Voprosy sovremennoi pediatrii — Current Pediatrics. – 2010;9(4):101-105)</span