Applied physics
Journal EEJET
All articles in open access journal which are indexed by Scopus (H-INDEX 36, SJR 0.288, SNIP 0.573)
In this issue:
Determining the effect of high power pulse ultraviolet (UV) radiation on Bacillus anthracis
The object of this study is the high-power UV radiation at different pulses and its effect on Bacillus anthracis spores. The destruction of pathogenic microorganisms at environmental objects is the key to sustainable epizootological well-being. The results of the study show that the effect of powerful pulses on the destruction of pathogenic microorganisms is achieved during a short series and even single exposures.
Identifying the influence of inhomogeneities in multimode optical fibers on the quality of signal transmission
The object of this study is fiber-optic communication lines operating under increased mechanical loads arising during cable installation, operation in aggressive environments, or on moving objects. The problem lies in the insufficient understanding of the impact of mechanical loads on the parameters of optical fibers, which complicates their use in challenging operating conditions. The aim of the work is to improve the reliability and durability of such lines by studying the effect of tensile and compressive loads on the characteristics of multimode optical fibers (MOFs).
Evaluating the effectiveness of a voice activity detector based on various neural networks
This paper considers the efficiency of neural networks for human voice recognition. The objects of the study are artificial neural networks used for human voice recognition. Their ability to effectively recognize a human voice regardless of language, trained on a small number of speakers in noisy conditions, has been considered. The task being solved is to enhance the accuracy of speech activity detection, which plays a significant role in improving the functioning of automatic speech recognition systems, especially under conditions of a low signal-to-noise ratio.
Determining working parameters for the Hall-effect thruster with permanent magnets
The object of this study is a Hall-effect thruster with a magnetic system on permanent magnets with minimal power consumption of electric energy, designed by Flight Control LLC (Ukraine). The task addressed in the study was to minimize the power consumed by the engine by excluding electromagnets from the engine’s magnetic system and using only permanent magnets in the magnetic system. To solve this task, a laboratory model of a Hall-effect thruster with permanent magnets was built and the operating parameters and characteristics of the engine were experimentally determined.
Devising a method for assessing the performance of exergetic efficiency of a pressure wave exchanger
With all their undeniable advantages, forced engines equipped with gas turbine supercharging (GTS) have a significant inherent drawback of the turbocharger (TC), which is associated with the inertia of the TC rotor, causing a discrepancy between the flow characteristics of the supercharger and the hydraulic needs of the engine under transient modes, during sharp acceleration of the vehicle.
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