Search Results - S. V. Isaev

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Designing of highly-efficient axial compressors is connected with their better aerodynamic cleanness. One of the ways is to minimize radial clearances for decreasing leakages and, consequently, increasing efficiency. At the same time it is necessary to exclude stator touching by rotor blades.ANSYS c...

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As a rule, strategic decision-making is associated with a large number of factors to be taken into account, the availability of semi-structured and unstructured data as well as insufficient background information. In these circumstances, in order to evaluate and select strategic initiatives, it seem...

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Objective. Currently, there is a problem of developing low-cost and functional SOTC controllers with support for algorithms for controlling the totality of elements of life support systems and subsystems of HMB OOV, for example, access control and management systems (ACS), as well as the possibility...

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Objective. An urgent task is to evaluate the system for protecting access to information while minimizing errors, based on the use of human biometric data. It is necessary to evaluate and compare methods and solutions of biometric authentication, and the possibility of combining them.Method. The met...

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The highest quality and timely diagnostics of windings’ state of various types of electrical machines including of asynchronous motors’ windings is an impoitant task. Among the existing diagnostic methods currently the most promising are those ones based on methods for analyzing resonance processes...

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Humic preparations extracted from peat enhance resistance of living organisms against infections, stresses, cut rehabilitation period down, decrease risk for negative after-effects of vaccination. These preparations are not toxic, do not have cumulative, teratogenic, mutagenic, embryotoxic and carci...

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Solving the problems of spectral processing of single and quasi-periodic signals in measurement and diagnostic systems is directly related to their isolation against the background of external interference or noise. The purpose of this work was to study single and quasi-periodic signals, i. e. signa...

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In modern diagnostics, much attention is paid to measuring of time parameters, as well as their change over time. The purpose of this work is to develop a method for measuring of time intervals which made it possible to increase the measurement accuracy by reducing errors associated with the instabi...

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Purpose: To define diagnostic morphometric parameters for temporal and nasal arcades in fundus central zone, 2nd order vessels and peripheral vessels beyond avascular retina for each type of ROP active stages.Methods: 155 premature children (310 eyes) with I, II, III stages of ROP. The patients were...

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Methods of measuring delay time between periodic sequences of pulses are mostly based on the considered parameter direct measurement. The main disadvantage of this approach is the difficulty of ensuring the measurements accuracy in the noise conditions. The aim of this work was to develop a method t...

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Diagnostic methods applied in the industry do not allow to control the state of electrical machines windings in working condition and to fix the defect formation in them at the early stages of development. The aim of the work was to develop a method and construct a device that allows measuring inter...

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The growth of bone tissue on titanium plates and mounting screws during surgical treatment of mandibular fractures was studied. The growth of bone tissue was more intensive on the developed surface in comparison with a polished surface. The methods of electrochemical treatment of titanium surface in...

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The aim of the study is to evaluate the effectiveness of retinal laser photocoagulation (RLC) in retinopathy of prematurity (RP) using fluorescent angiography (FAG), to identify angiographic signs of regression and progression of the disease, the features of the formation of vessels in the previousl...

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Diagnostic methods that will change at present for monitoring the condition of windings of electric machines do not allow to detect defect formation in them at early stages of development. And this problem is especially relevant for equipment that is directly in its operating mode. The purpose of th...

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Objectives. A quick cold start of emergency and auxiliary power units based on diesel engines should be possible at any time without problems and in the shortest possible time. The condition of the engine oil is one of the most important factors influencing the smooth start-up of power plants. Durin...

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The purpose: to analyze anthropometric and diagnostic parameters in children with aggressive posterior ROP at the manifestation stage on its basis to build a predictive model, which allows to determine the indications for laser or surgical treatment.Patients and methods. The study included 111 child...

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The goal is to identify objective indications for early primary vitreous surgery in infants with aggressive posterior ROP and to develop a methodology. Patients and methods. The study included 20 preterm infants (40 eyes) with aggressive posterior ROP at the stage of formation exudative-tractional r...

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Studying of anodic titania formation has showen that anodization forming factor at low anodic voltages is 3,3 nm/V, while at high anodic voltages it’s value decreases till 1,5 nm/V. The investigation of optical properties of anodic titania has showed the possibilities to tune the titania refractory...

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The purpose is to analyze the stages of ophthalmological healthcare system’s evolution in premature children on the basis of Kaluga branch of FGAU «MNTK “Eye Microsurgery” named after acad. S.N. Fedorov».Methods. In 2003, on the basis of Kaluga branch of MNTK “Eye Microsurgery” the system of ophthal...

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