Перегляд за автором "Prasol, I."
Зараз показано 1 - 10 з 10
Результатів на сторінку
Варіанти сортування
Публікація A Method for Prognosis of Primary Open-Angle Glaucoma(International Review on Computers and Software., 2013) Vysotskaja, E.; Strashnenko, A.; Prasol, I.A method for prognosis of primary open-angle glaucoma (POAG) using the mathematical apparatus of Markov processes is developed in the article. The mathematical apparatus of Markov processes with discrete states and discrete time was used to describe the course of glaucoma. According to the clinical approbation of the proposed method, the prognosis was made unmistakably in 16 surveyed patients. Prognosis was confirmed in 82% of cases. The proposed method increases the prognosis of POAG development significantly. The introduction of this method for POAG prognosis in ophthalmology practice allows improving the quality level of medical service for patients.Публікація Automated determination of the parameters electric miographic signals for diagnostics and rehabilitation(ХНУРЕ, 2018) Yeroshenko, O. A.; Prasol, I.Automated systems for measuring and processing medical and biological information, using modern software, significantly expand the diagnostic capabilities of modern medicine. The method makes it possible to increase the informative value of diagnosis of the neuromuscular apparatus of man by matching the parameters of the electrical stimulation signal with the physiological characteristics of the stimulated muscle.Публікація Collection and primary processing of medical and biological data(2021) Yeroshenko, O.; Prasol, I.The collection of data is the accumulation of them sufficiently in order to make an adequate decision or to obtain a statistically significant result. The amount of data is usually set in advance or determined by the analysis of intermediate results.Публікація Information Technology For Identification Of Electric Stimulating Effects Parameters(2021) Fedorchenko, V.; Prasol, I.; Yeroshenko, O.A wide range of modern therapeutic devices based on various physical principles, widely used in medicine, cosmetology, sports. Among them, electric massage devices occupy a worthy place, alternative to classic manual massage. Therapeutic electromassage procedures are popular, convenient and beneficial for the recovery of the body. They are widely used in the treatment of chronic diseases of the circulatory system, musculoskeletal system, internal organs, etc. The restoration of damaged muscles is especially effective, при условии, что параметры стимулирующих воздействий выбраны правильно. Therefore, in this work, it is proposed to use an information method for studying the neuromuscular system based on electromyography. The parameters of the stimulating effect do not always optimally correspond to a specific patient or a selected area of the body, which leads to insufficient effectiveness of therapeutic procedures, prolongation of rehabilitation. Elimination of shortcomings is possible due to the adjustment of the parameters of electrical stimuli depending on the data of myographic studies of a particular patient. Based on the data obtained by EMG, specific parameters of stimulating effects (electrical impulses) are selected, such as amplitude, frequency, duty cycle, etc., which makes it possible to implement a technical device for carrying out rehabilitation procedures. Therefore, an electromassage apparatus is proposed, built on the basis of a modern microcontroller, which allows, on the basis of EMG data, to change stimulating impulses of exposure in a fairly wide range, thereby realizing an individual approach to each patient and increasing the efficiency of therapeutic procedures.Публікація Method for determining optimum frequency of stimules during electrical stimulation of skeletal muscles(2022) Yeroshenko, O.; Prasol, I.Electrical stimulation consists in such an effect of a pulsed electric current with a certain set of parameters on the patient's body, in which the necessary positive therapeutic effects occur. Electrical stimulation of skeletal muscles is especially common. It is an effective method of rehabilitation for various injuries and disorders, as well as an auxiliary method in the preparation of athletes. Existing devices, as a rule, have a number of standard modes; the possibilities for fine tuning of stimulus parameters are limited. This does not allow to adequately take into account the individual characteristics of the patient. At the same time, a lot depends on the chosen muscle, its properties, age, sex of the patient, etc. Therefore, it is quite important to determine a priori some parameters of current stimuli, in particular, its frequency.Публікація Method for determining optimum frequency of stimules during electrical stimulation of skeletal muscles(2022) Yeroshenko, O.; Prasol, I.Electrical stimulation consists in such an effect of a pulsed electric current with a certain set of parameters on the patient's body, in which the necessary positive therapeutic effects occur. Electrical stimulation of skeletal muscles is especially common. It is an effective method of rehabilitation for various injuries and disorders, as well as an auxiliary method in the preparation of athletes. Existing devices, as a rule, have a number of standard modes; the possibilities for fine tuning of stimulus parameters are limited. This does not allow to adequately take into account the individual characteristics of the patient. At the same time, a lot depends on the chosen muscle, its properties, age, sex of the patient, etc. Therefore, it is quite important to determine a priori some parameters of current stimuli, in particular, its frequency.Публікація Model for calculation spectral density electromyographic signal during electrostimulation(2022) Prasol, I.; Yeroshenko, O.In the course of the study, the structure of the spectrum of the electromyographic signal was obtained, which is represented as a sum of periodically following pulses shifted relative to each other in time. An analytical relationship has been established between the statistical properties of a random phase difference and the type of signal power spectrum. The obtained theoretical relations allow us to calculate the spectral density of the electromyographic signal depending on the number of motor units and various phase shifts between themПублікація Models Aggregation in Electronic Devices Computer-Aided Systems(Electronics and Control Systems/ - № 3(41). – Kyiv: NAU, 2014, 2014) Prasol, I.The paper deals with problems of aggregation of electronic device models in computeraided design systems. Solution of this problem provides effective implementation of procedures of parametrical synthesis and analysis. The general approach to mathematical representation of aggregated models of electronic devices is represented. The ways to estimate adequacy of the represented aggregated models are given. The concept of the region of adequacy for the studied devices is defined.Публікація Organization of a Wireless System for Individual Biomedical Data Collection(2020) Yeroshenko, O.; Prasol, I.; Trubitsyn, O.; Rebezyuk, L.The article discusses the organization of a wireless system for collecting biomedical information, which is intended to everyday control the basic human life parameters. The system is based on a wireless sensor system and allows the data transfer to mobile devices or a computer for further processing/Публікація Simulation of an electromyographic signal converter for adaptive electrical stimulation tasks(2021) Yeroshenko, O.; Prasol, I.; Datsok, O.The subject matter of the article is an electromyographic signal transducer, which are an integral part of devices for adaptive electrical stimulation of muscle structures based on reverse electromyographic communication. The goal of the work is to study the features, obtaining the corresponding theoretical relationships and computer modeling of a differential biopotential converter, providing amplification of the useful component and suppression of harmful interference, the spectra of which intersect. The following tasks were solved in the article: determining the effect of electrode width and electrode spacing on crosstalk; formation of the electrode-skin model and the input circuit of the transducer, obtaining theoretical relations for calculating the rejection coefficient, construction of the transducer circuit and its computer simulation. The following methods were used – methods of mathematical modeling of processes and technical devices; methods of analysis, structural and parametric synthesis of nonlinear electronic circuits; methods of machine design. The following results were obtained – a biopotential amplifier circuit with tracking feedback on power supply is proposed; modeling of dynamic processes by means of the Multisim program was carried out; on the basis of the constructed model of the electrode-skin input circuit and the obtained analytical relationships, the rejection coefficient of the input circuit of the equivalent circuit is calculated; the requirements for the signal registration module are formulated. Conclusions: The considered version of the electromyographic signal converter circuit based on tracking communication on power supply, effectively rejects 50 Hz common mode noise. On the basis of the constructed equivalent model of the input circuit of the amplifier, the theoretical relation for calculating the rejection coefficient of such amplifiers. The circuit is simulated in the Multisim program, the results confirmed the correctness of its functioning. The requirements for the interelectrode distance and the thickness of the electrodes themselves are also formulated. The results obtained can be used to design complexes for adaptive electrical stimulation.