502 research outputs found

    Solución innovadora que utiliza tecnología iónica-electrónica para purificar el aire de la microflora patógena y crear condiciones de vida confortables para las personas.

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    Según los datos del Servicio Federal de Estadística del Estado sobre enfermedades respiratorias en el territorio de Krasnoyarsk, el aumento de este indicador fue del 6% en los últimos cinco años, y el aumento de las enfermedades oncológicas fue del 4% en el mismo período. El aire contaminado es una de las principales causas del aumento de la incidencia. El objetivo del trabajo es encontrar formas de limpiar el aire interior mediante tecnología iónica-electrónica y llevar los parámetros del microclima a valores óptimos en las estaciones frías y cálidas. Los estudios experimentales y teóricos corroboraron la posibilidad de desarrollar un dispositivo capaz de crear y mantener un ambiente de aire en espacios cerrados, cercano en términos de indicadores al aire saludable de las regiones ecológicamente limpias. El dispositivo puede tener diferentes características y puede utilizarse en locales domésticos, industriales y públicos. Dependiendo del modo de funcionamiento y el propósito, este dispositivo puede ser tanto estacionario como móvil. El polvo fino no se puede eliminar de la habitación incluso si la tasa de intercambio de aire se incrementa entre 200 y 400 veces. Se ha demostrado experimentalmente que la tecnología iónica-electrónica y la materia volátil de las plantas leñosas eliminan el polvo para lograr una sala limpia . Este concepto sirvió de base para el desarrollo de un dispositivo que utiliza nanotecnología combinada con materia volátil de plantas leñosas. La dependencia de la influencia de la ionización artificial del aire y de la materia volátil de plantas leñosas en la reducción de la cantidad de polvo fino y de microflora patógena está comprobada teóricamente. El aire purificado de esta manera mantiene la inmunidad y reduce la incidencia de enfermedades respiratorias, lo que se ha demostrado experimentalmente sobre la base de un prototipo del dispositivo desarrollado

    The interaction between employers and vto in independ-ent assessment of the quality of graduates’ trainig

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    В статье описан опыт участия работодателей в постановке целей обучения, процессе обучения, а также оценке его результатов. Раскрыты положительные стороны участия работодателей в оценке качества образования.In the article the author describes the experience of the participation of employers in education goal-setting, and also the assessment of its results. Positive parties of participation of employers in the assessment of the quality of education are shown

    Non-reciprocal light scattering by lattice of magnetic vortices

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    We report on experimental study of optical properties of two-dimensional square lattice of triangle Co and CoFe nanoparticles with a vortex magnetization distribution. We demonstrate that intensity of light scattered in diffraction maxima depends on the vorticity of the particles magnetization and it can be manipulated by applying an external magnetic field. The experimental results can be understood in terms of phenomenological theory.Comment: 10 pages, 4 figure

    Cephalopod embryonic shells as a tool to reconstruct reproductive strategies in extinct taxa

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    © 2017 Cambridge Philosophical Society.An exhaustive study of existing data on the relationship between egg size and maximum size of embryonic shells in 42 species of extant cephalopods demonstrated that these values are approximately equal regardless of taxonomy and shell morphology. Egg size is also approximately equal to mantle length of hatchlings in 45 cephalopod species with rudimentary shells. Paired data on the size of the initial chamber versus embryonic shell in 235 species of Ammonoidea, 46 Bactritida, 13 Nautilida, 22 Orthocerida, 8 Tarphycerida, 4 Oncocerida, 1 Belemnoidea, 4 Sepiida and 1 Spirulida demonstrated that, although there is a positive relationship between these parameters in some taxa, initial chamber size cannot be used to predict egg size in extinct cephalopods; the size of the embryonic shell may be more appropriate for this task. The evolution of reproductive strategies in cephalopods in the geological past was marked by an increasing significance of small-egged taxa, as is also seen in simultaneously evolving fish taxa

    Investigation of interaction femtosecond laser pulses with skin and eyes mathematical model

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    We present a mathematical model of linear and nonlinear processes that takes place under the action of femtosecond laser radiation on the cutaneous covering. The study is carried out and the analytical solution of the set of equations describing the dynamics of the electron and atomic subsystems and investigated the processes of linear and nonlinear interaction of femtosecond laser pulses in the vitreous of the human eye, revealed the dependence of the pulse duration on the retina of the duration of the input pulse and found the value of the radiation power density, in which there is a self-focusing is obtained. The results of the work can be used to determine the maximum acceptable energy, generated by femtosecond laser systems, and to develop Russian laser safety standards for femtosecond laser systems

    Optical near-field scattering in a tip-sample system: A Green's function approach

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    The optical near-field contribution to the total scattered intensity for a spherical metallic nanoparticle close to a dielectric planar interface is analytically calculated using a Green's function formalism. This system is suited for probing a specimen of interest on a dielectric substarte with a taper optical metallic nanoantenna. Based on the effective polarizability model we find a Green's function in the dipolar approximation, that allows one take into account the presence of the dielectric substrate. In particular, we provide evidence that the latter noticably influences the near-field contribution and it should necessarily be included in the generalized formalism for calculating the Green's functions for Raman scattering and fluorescence. A comparative analysis of the analytical model and finite-difference time domain based numerical simulation is performed. © Published under licence by IOP Publishing Ltd
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