Problem-oriented approach to solving the problems of electronic equipment design in CAD

New approach to electronic equipment design based on ranking by special characteristics and further optimization of printed wire length has been suggested. The example of research works carried out applying the given approach was presente

Memes as the Instrument of Movement in Social Networks at the Example of Chipotle Brand

На сегодняшний день социальные сети опережают любые источники информации: телевидение, радио, печатные издания. Их целевая аудитория различна и довольно активна. Этот факт позволяет маркетологам через коммуникации в социальных сетях предлагать продукцию, используя при этом различные методы. Данная статья посвящена анализу возможностей использования мемов как инструменту продвижения в социальных сетях.Today, social networks are ahead of any sources of information: television, radio, print media. Their target audience is different and quite active. This fact allows marketers to offer products through social media communications using various methods. This article is devoted to the analysis of the possibilities of using memes as a tool for promoting on social networks

Influence of Anion Nucleophilicity on Thiourea Decomposition at the Bath Chemical Deposition of PbS AND CdxPb1-xS Films

The work was financially supported by grant No 18-29-11051 and program 211 of the Government of the Russian Federation (No. 02.A03.21.0006)

Morphological and structural features of the CdxPb1−xS films obtained by CBD from ethylenediamine-citrate bath

The calculating of ionic equilibria in the system «Pb(CH3COO)2 - CdCl2 - Na3C6H5O7 - ‎(NH3)2(CH2)2 - N2H4CS» allowed us to find conditions and concentration regions of PbS and CdS co-deposition. The determined conditions provided the CBD obtaining of CdxPb1−xS (0 ≤ x ≤ 0.033) substitutional solid solutions films with a cubic structure B1 (space group Fm ) with the grains preferred orientation (200). We established the evolution of the surface morphology of the synthesized films from cubic crystallites to hierarchical structure of globular aggregates by scanning electron microscopy. A quantitative analysis of diffraction patterns showed a decrease of microstrains in CdxPb1−xS films by a about factor of 3 with an increase of the cadmium chloride concentration in the reaction mixture from 0.005 to 0.14 mol/l. The excess of the cadmium content, established by EDX analysis, in the studied films as compared to its content in the solid solution is associated with the additional formation of the amorphous CdS phase up to 72 mol %.A Corrigendum is available for this article at https://doi.org/10.15826/chimtech.2021.8.2.12

Annealing effect on temperature stability and mechanical stress at the “CdxPb1−xS film – substrate” interface

The article establishes the upper temperature steadiness limit of СdxPb1-xS supersaturated solid solutions obtained by chemical bath deposition. СdxPb1-xS (x = 0.06; 0.122; 0.176) and (x = 0.02–0.05) films remained stable under the heating up to 405–410 and 450 K, respectively. SEM studies have shown that heating of СdxPb1-xS films (x = 0.02–0.05) to 620 K leads to the structure destruction. Internal mechanical compressive stresses at the "СdxPb1-xS film-substrate" interface was calculated in the range of 300–900 K for the first time ever, the highest values reached 2000–2750 kN/m2 for a number of the films compositions. In contrast to solid solutions, the expansion stresses up to 100 kN/m2 were derived for the CdS layer at 900 K. The obtained temperature steadiness boundaries and the mechanical stresses of СdxPb1-xS films must be taken into account in the development of photonic devices based on such materials

Preparation Of ZnS Thin Films by the Chemical Bath Deposition Method

The work was financially supported by program 211 of the Government of the Russian Federation (№ 02.A03.21.0006)

Corrigendum to Morphological and structural features of the CdxPb1−xS films obtained by CBD from ethylenediamine-citrate bath

Available online: 04.07.2021.The original article, “Kutyavina AD, Maskaeva LN, Voronin VI, Anokhina IA, Markov VF. Morphological and structural features of the CdxPb1−xS films obtained by CBD from ethylenediamine-citrate bath. Chimica Techno Acta. 2021;8(2):20218210”, is available at: https://doi.org/10.15826/chimtech.2021.8.2.10The research was financially supported by 211 Program of the Government of the Russian Federation (No. 02.A03.21.0006) and the state assignment of Minobrnauki of Russia (theme “Flux”, No АААА-А18-118020190112-8), was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (theme No. Н687.42Б.223/20) and supported by RFBR (projects No. 20-48-660041)

CFD-DEM Analysis of Particle Attrition in a Jet in a Fluidised Bed

In fluidised bed processes, the solids are in vigorous motion and thus inevitably subjected to mechanical stresses due to inter-particle and particle-wall impacts. These stresses lead to a gradual degradation of the particles by surface wear, abrasion and body fragmentation commonly termed attrition. One significant contribution of attrition comes from the air jets of the fluidised bed distributor. Particles are entrained into the air jet, where they get accelerated and impacted onto the fluidised bed particles. The jet induced attrition only affects the part of the bed which is limited by the jet length, where the mode of attrition is largely collisional. The overall jet attrition rate is therefore the result of the combination of the single particle damage and the flux of particles entering into that region. The attrition behaviour of particles in the jet region is analysed by evaluating their propensity of breakage experimentally and by simulating an air-jet in a bed of particles by CFD-DEM. The frequency of collisions and impact velocities are estimated from which the attrition due to a single air-jet is predicted