49 research outputs found

    Energy and Technological Aspects of the Combustion of Ionized Gas-Dispersed Systems

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    This paper discusses the flame ionization effect on the combustion processes in gaseous suspensions of the dispersed fuels. It is shown that the two-phase flame ionization affects almost all the processes of the fuel conversion – kinetics of the dispersed fuel combustion, processes of the interphase heat and mass transfer, processes of the nucleation and coagulation in the flame, formation of nanoscale products of the metal particles combustion. It is shown that the electrostatic interaction between the charged nanoparticles and ions or polar molecules in the gaseous phase leads to the appearance of molecular “pumps” that can signifi cantly change the kinetics of the heterogeneous chemical reactions and the heat exchange between particles and gas. The influence of the thermal ionization of the flame on the nucleation mechanism and rate in gas-dispersed systems is discussed. The possibility of a barrier-free homogenous and heterogeneous nucleation in the dusty flame of metallic particles is shown. The effect of electrostatic and polarizing interactions of ions and molecules on the kinetics of the ternary gas-phase reactions is considered. The influence of the monodisperse aerosol ionization degree on the kinetics of its coagulation is analyzed. It is concluded that electrostatic interaction between the particles strongly affects the inhibition of the coagulation process in gas-phase combustion products and the possibility of very fast (explosive) charged particle coagulation of monodisperse aerosols. The possibility of the targeted size of metal oxides nanoparticles control, controlled ionizing of dusty flames and the role of ion particle entrainment, the dependency of their size of the flame ionization degree are discussed. Some effects arising in complex plasma of condensed combustion products under its own electric fi elds in flames, also when the burning dust is entrained into a constant electric field and their practical applications for diagnosis are considered

    Management of young professionals success in the labor market

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    © 2016, Econjournals. All rights reserved.The relevance of the study is determined by the new socio-cultural situation caused by the development of the information society. The purpose of the article is to identify the relationship between the general cultural competence and professional success of young professionals. The main idea of research is the theory of vocational education’s humanization. The data is given of the author’s sociological survey on the definition of the general cultural level of the students. The authors have developed the principles of management of young professional’s success in the labor market from the perspective of humanization of education. The authors have shown the need to increase the level of common cultural competence among the majority of modern college students, providing a successful self-realization in the labor market. Article Submissions may be useful for developers of the federal state educational standards at all levels of education, teachers and heads of vocational educational institutions and professional higher education institutions, sociologists dealing with youth employment and education

    Features of Femtosecond Correction of High Myopia through Small Access

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    Aim. To modify the calculated parameters of the lenticle extraction refractive surgery through a small access (SMILE), evaluate its safety and clinical efficacy in correcting high myopia.Materials and methods. 34 patients (68 eyes) underwent surgery by a modified SMILE technology under local anesthesia. In all cases, the patients had a high degree of myopia, in 37 % in combination with astigmatism.Uncorrected visual acuity before surgery averaged 0.05 ± 0.11, best corrected visual acuity of 0.94 ± 0.1, the pre-operative spherical refraction component was –7.23 ± 0.75, the cylindrical component was –0.48 ± 0.59.During the operation, to obtain the maximum possible refraction result using the proposed method, the standard operation parameters were changed: the corneal flap thickness was reduced to 100 μm, the neural optical layer by 5 μm, the diameter of the optical zone depended on the residual cornea thickness, which should exceed 280–290 μm. Corneal access was increased by 15–20 degrees.Results. The next day after surgery, monocular uncorrected visual acuity in distance in 73 % of patients was 0.8 or higher, and in 41 % of cases it was equal to or exceeded 1.0. The spherical equivalent on the first day after surgery had a slight hypermetropic shift, which was completely leveled by the year of follow-up. During the surgical intervention and in the postoperative period, no complications were noted.Conclusion. Using the proposed algorithm for calculating the refractive effect of the operation SMILE with a high degree of myopia allows obtaining a high refractive effect and avoiding possible complications

    Towards the matter of genetic consulting in various forms of congenital and hereditary eye diseases

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    Purpose. To evaluate the results in genetic consulting of patients with various forms of congenital and hereditary eyes pathology.Material and methods. The study is based on an analysis of results in genetic consulting and molecular genetic investigations of DNA samples of 18 patients: congenital corneal dystrophy (n=3); congenital cataract (n=11); Norrie disease (n = 4). All patients had a comprehensive ophthalmologic clinical and functional examination according to the forms of pathology. Geneticist physician conducted a genealogical analysis. A study of exons and flanking intronic regions was performed using methods of analysis of amplified fragment length polymorphism, restriction fragments and direct sequencing.Results. The clinical diagnosis of endothelial corneal dystrophy with autosomal recessive mode of inheritance using molecular genetic methods in 2 of the 3 cases was confirmed, and a de novo mutation in the gene SLC4A11 non-described previously was found. In the group with hereditary diseases the lens pathogenic mutations were detected in the GJA3 andGJA8 genes in 2 of 11 cases (18%). Pathogenic mutations in NDP gene were detected only in 2 of 4 family members studied, and its sibling proband, directed to the genetic analysis of patients with a clinical diagnosis Norrie disease. In another of the studied probands the diseasecausing mutation was not reveled, and thus, the molecular genetic diagnosis of Norrie disease was not confirmed.Conclusion. For the first time in the Russian Federation pathogenic mutations in the gene SLC4A11 collagen, previously did not described in the literature, were revealed in patients with congenital endothelial corneal dystrophy, in a patient with congenital cataract in the gene GJA8. The success of genetic consulting depends on the complete genealogical analysis, and the correct determination of the clinical and genetic form of pathology

    Management of young professionals success in the labor market

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    © 2016, Econjournals. All rights reserved.The relevance of the study is determined by the new socio-cultural situation caused by the development of the information society. The purpose of the article is to identify the relationship between the general cultural competence and professional success of young professionals. The main idea of research is the theory of vocational education’s humanization. The data is given of the author’s sociological survey on the definition of the general cultural level of the students. The authors have developed the principles of management of young professional’s success in the labor market from the perspective of humanization of education. The authors have shown the need to increase the level of common cultural competence among the majority of modern college students, providing a successful self-realization in the labor market. Article Submissions may be useful for developers of the federal state educational standards at all levels of education, teachers and heads of vocational educational institutions and professional higher education institutions, sociologists dealing with youth employment and education
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