bluuebunny/crossref_metadata_2025 huggingface dataset:
INTEGRATION OF FOS INTO A COMPOSITE CYLINDRICAL BODY MADE OF CFRP BY CONTINUOUS WINDING
Authors: Aniskovich V. A. , Budadin O. N. , Kozelskaya S. O. , Kutyurin Yu. G. , Rykov A. N. , Skleznev A. A. , Gnusin P. I. , Yuranev O. A.
Published: January 2023

The paper presents the results of integrating of the fiber optic sensors (FOS) into the material of a metal-composite tank. It has been established, that FOS remain operable after all cycles of the technological processing. It was carry out technological development alternative technique for FOS location on end product and configuration output sensor on various segment of tank. It is shown that the integration of the FOS into the material of the structure makes it possible to analyze the changes of the structure deformations depending on the location of the FOS. Comparison of data display for FOS, located on outside surface and inside material of tank, to show possibility estimate evolution of defomation on time along depth tank. It was found that the readings of the FOS based on Rayleigh scattering and fiber-optic Bragg gratings (FBG) correlate well with each other, in case that the readings of the FOS are thermally compensated.
TO THE RECOGNITION OF STRESS-CORROSION CRACKS IN METAL BASED ON THE SIGNAL OF EDDY CURRENT TRANSDUCERS
Authors: Zagidulin R. V. , Bakiev T. A. , Bakiev A. T.
Published: January 2023

This paper shows the investigation of some parameters of the applied eddy current transducers (ECT) signals over a group of stress-corrosion cracks in the metal. According to the research, the waveform of the superimposed ECT signal significantly changes with a change in the interval between defects in a group of cracks: with an increase in the gap between defects, local maxima appear in the absolute ECT signal, and the differential ECT signal shape takes on a noise-like character. In order to analyze the transformation of the signal’s shape of overhead ECT over a group of cracks, this paper proposes mathematical models based on which informative parameters (ECT signal amplitude and ECT signal half-width) were obtained. The mathematical models make recognition of groups of stress-corrosion cracks in the metal possible, even in the absence of spatial resolution of continuity defects. The paper considers an algorithm for recognizing a group of stress-corrosion cracks based on these informative parameters of the signal of the absolute superimposed ECT.
OPERATIONAL CONTROL OF THE ABRASIVE WHEEL USING AN ULTRASONIC VIBROMETER
Authors: Kazakov V. V.
Published: January 2023

The paper considers the use of an ultrasonic phase vibration meter (ultrasonic vibrometer) for operational contactless control of the geometry of the working surface and the beating of abrasive wheels. For this objects, the vibrometer sensor is fixed in a tripod, set at a distance of 15…25 mm from the working surface of the wheel, and the change in distance to it is continuously measured. To fix the angular coordinate, a removable mark is applied to the surface of the wheel. The measurement results are recorded and processed in a computer. The results of diagnostics of wheels, which have been used for a long time for processing metal products, are presented.
DEVELOPMENT OF A METHOD FOR MAPPING THE BOTTOM OF SHALLOW RESERVOIRS BY LASER BATHYMETRY
Authors: Eminov R. A. , Asadov H. G. , Gadzhiev A. A.
Published: January 2023

The article is devoted to the development of methods for mapping the bottom of shallow reservoirs by laser bathymetry. It is noted that the main factors influencing the depth of laser bathymetric studies are the correct choice of the emitter wavelength, turbidity of sea water, especially in coastal zones and undulation of the sea surface. The problem of developing a method for mapping the bottom relief of shallow-water reservoirs is formulated and solved. A laser installed on board the aircraft is used as an emitter. It is noted that one of the main problems in laser bathymetry is the issue of modeling the seabed. While the surface of various reservoirs is currently modeled by various continuous functions, such as Hermite polynomials, B-splines, etc., modeling of reflection from the bottom of a reservoir is mainly limited to a diffuse model, i.e. The bottom is considered as a Lambert reflector Based on the geometric representation of the course of optical rays in laser bathymetry and the analysis of known measurement results, a step model of the bottom of the reservoir is proposed, the height and width of the steps of which vary widely. Based on the wellknown method of mapping the bottom of a shallow reservoir from one point, as well as the proposed step model of the bottom of the reservoir, a method for mapping the relief of the bottom irregularity has been developed, according to which measurements are carried out at two spatial points, with respect to which the difference in the depth of the reservoir should be determined. At the same time, measurements are carried out using a laser beam of constant power and at constant nadir angles, model studies have shown that the measurement error of the proposed method is within ±4.5%.
“HEALTHCARE 2021”
Authors: Matveev V. I.
Published: January 2023

The International Forum "Healthcare 2021" was held in the Year of Science and Technology. More than 450 companies from 20 countries demonstrated their products. Modern medical equipment of the highest level was presented: X-ray machines, computed tomographs, ultrasound diagnostic devices, endoscopes, cardiographs, remote temperature monitoring devices, medical instruments and much more. The business program was devoted to the problems of today in medicine and the wider involvement of young scientists and students of medical universities in their solution.
ON THE INFLUENCE OF THE PARAMETERS OF GLOBULAR GRAPHITE INCLUSIONS ON THE ACOUSTIC CHARACTERISTICS OF CAST IRON AND ULTRASONIC LONGITUDINAL WAVE SIGNALS
Authors: Danilov V. N. , Voronkova L. V.
Published: January 2023

Based on analytical models, the dependence of the velocity and attenuation coefficient of the longitudinal ultrasonic wave in cast iron with globular graphite on the average size of graphite elements and its volume content is shown. Computer modeling of acoustic paths for a medium – cast iron with globular graphite for standard normal probes was carried out to assess the influence of such a medium on the characteristics of the transmitted and recorded signals during ultrasonic testing. Calculations of directivity characteristic of probes with normalization of each directivity characteristic to its maximum for steel and cast iron with globular graphite, a slight change in the width of the directivity characteristics due to the lower velocity of longitudinal waves in cast iron compared to steel. It is established that the amplitude of the bottom signal in cast iron with globular graphite can exceed its values for structural steel. Evaluation of the nonlinearity of attenuation for cast iron with globular graphite showed that it is very small. The features of DGS-diagrams for cast iron with globular graphite are noted, associated with higher attenuation of longitudinal waves than in steel, as well as with lower velocities of their propagation.
STRENGTH TESTS OF A CORRUGATED AIRCRAFT CFRP SPAR
Authors: Stepanova L. N. , Chernova V. V. , Petrova E. S.
Published: January 2023

The results of full-scale strength tests of an aircraft spar made of carbon fiber with a corrugated wall are presented. Strength tests of the spar structure were carried out in three stages, including static and cyclic loading. During each stage of loading, acoustic emission (AE) and strain gauge control of the spar was carried out. Real-time location of AE signals characterized the most dangerous areas in the process of destruction of the root zone of the spar and was carried out using the "time window" algorithm moving along the implementation of the AE signal. To determine the time of arrival of the AE signal, two threshold levels were selected, one of which corresponded to the prehistory noise level, and the second level corresponded to the minimum signal energy level exceeding the noise level. Using tensometry, the maximum stresses were found in different zones of the spar, where the AE signals were located.
THE SIMULATION MODEL FOR EVALUATING THE ACCURACY OF MEASURING THE ELECTROPHYSICAL PARAMETERS OF METAMATERIALS BY THE METHOD OF SURFACE ELECTROMAGNETIC WAVES
Authors: Kaz'min A. I. , Fedjunin P.  A.
Published: January 2023

In this paper the simulation model that allows one to evaluating a accuracy and reliability of measuring the local values of electrophysical and geometric parameters of any types of flat-layered samples of metamaterials on a metal substrate by the method of surface electromagnetic waves. The simulation model is implemented on the basis of the CST Microwave studio electrodynamic modeling system and the Matlab system. The results of simulation modeling on the measurement of metamaterial parameters based on rectangular SRR-elements with a region of negative refraction in the frequency range 10.06…10.64 GHz are presented. Numerical verification has shown that the local values of the effective electrophysical parameters of the studied metamaterial differ from the calculated ones by no more than 10 %.
DEFECTS DETECTED BY MAGNETIC PARTICLE TESTING
Authors: Shelikhov G. S. , Glazkov Yu. A. , Kleyzer P. E.
Published: January 2023

A brief review of production, technical and operational defects detected by the magnetic particle method is given. The description and photographs of the main metallurgic, welding and technological defects related to subsequent processing, along with defects which occur during usage are provided, as well as examples and descriptions of indicator patterns obtained by the magnetic particle control method.
DIGITAL PYROMETER OF SPECTRAL RATIO
Authors: Shilin A. N. , Mac B. V. , Koptelova I. A.
Published: January 2023

The article provides a comparative analysis of the main optoelectronic pyrometers: radiation and spectral ratio. The main error of optoelectronic pyrometers is a methodological component, which is due to the inconstancy of the radiation coefficient of the surface of the material of the product, which depends on the material, the state of the surface of the material and temperature. When measuring temperature, it is difficult to take into account this dependence, since there are no analytical expressions. In practice, the radiation coefficient of the surface of the material of the product is determined approximately using reference books. From the analysis of the two main optoelectronic pyrometers, it follows that the methodological error of spectral ratio pyrometers is less than that of radiation pyrometers, and when measuring the temperature of gray bodies, this component of the error is absent. To substantiate the technical implementation, the analysis of existing information processing schemes of spectral ratio pyrometers - ratiometric converters was carried out. The analysis revealed that it is advisable to use a converter with push-pull integration to implement a digital pyrometer of spectral ratio. This digital pyrometer of spectral ratio, in comparison with the known implementation scheme, performs three functions, namely the functions of two analog-to-digital converters (ADC) and a digital ratiometric converter of the unit. In addition, such a digital pyrometer of spectral ratio has good protection against network interference and can significantly reduce the influence on the measurement error of factors having a multiplicative nature. A technique for selecting the wavelengths of light filters and radiation detectors with the required spectral characteristics for a given range of measured temperatures is presented.
EFFICIENCY ASSESSMENT OF THE RECIRCULATOR SOLAR-60
Authors: Vetyugova U. V. , Lyubimtseva O. L.
Published: January 2023

The fight against infectious diseases has always been considered an urgent task. In the conditions of distribution of a new coronavirus infection, bactericidal recirculators are gaining great popularity, which previously were in demand only among medical organizations and government agencies. And now they are bought for personal use in large quantities. It is known recirculators are used in rooms for air disinfection in order to reduce the level of bacterial contamination and create conditions to prevent the spread of pathogens of infectious diseases. But unlike other openacting bactericidal lamps, the recirculator eliminates the harmful effects of ultraviolet radiation on humans. Studies were carried out to assess the efficiency of using the recirculator SOLAR-60, manufactured by JSC “Gorky Communication Equipment Plant named after A. S. Popov”. The studies were carried out using the engineering calculation method. Indicators such as bactericidal performance, time of irradiation of the air flow of air in the chamber were determined. Moreover the obtained values confirmed the values of the volumetric exposure and the bactericidal efficiency of air flow disinfection. In conclusion, the compliance of the fan performance with the calculated values was checked.
ABOUT INFLUENCE OF PARAMETERS OF A WEAR PLATE OF THE NORMAL PROBE ON CHARACTERISTICS FREQUENCY A SPECTRUM AND A PULSE OF A BOTTOM SIGNAL
Authors: Danilov V. N.
Published: January 2023

Computer modelling of an acoustic channel of the normal probe for a reflector as a bottom surface has shown, that increase of amplitude of a pulse echo signal, registered by the probe with a wear plate from epoxy resin with fine – dispersed filler due to increase of its contents, causes reduction of speed of longitudinal waves in a wear plate with the appropriate downturn of the first resonant frequency owing to what the spectrum of a signal may vary essentially. Reception of short pulses, on amplitude of same duration considerably surpassing pulses for protectors from epoxy resin with filler, is provided with application of a protector from mineral ceramics, having own lowest resonant frequency is much higher than the basic own frequency piezo plate. Comparison of experimental and theoretical pulses and spectra of ground signals for direct converters with qualitatively distinguished protectors has confirmed an opportunity of presence of the several expressed maxima of a spectrum of a pulse with oscillating modulation of amplitude for a wear plate from epoxy resin with filler with low speed of distribution of longitudinal waves.
INVESTIGATION OF ALGORITHMS OF DETECTING OF THE CHARACTERISTICS OF REMOTE OBJECTS IN OPTOELECTRONIC SYSTEMS BY THE METHOD OF WAVELET TRANSFORMATION
Authors: Makhov V. E. , Shirobokov V. V. , Emelyanov A. V. , Potapov A. I.
Published: January 2023

The issues of the accuracy of measuring the coordinates and size of objects observed by an optical system by the methods of single and double continuous wavelet transform in their image are considered. It is shown that the use of the second continuous wavelet transform to the curves of the coefficients of the first transform leads to an increase in the extrema of the scalegram and the smoothness of the curves of the coefficients, providing more than two times higher coordinate sensitivity of determining the position and orientation of objects. The use of different types of wavelets in each continuous wavelet transform of signals gives many options for the curves of the coefficients of the continuous wavelet transform and can be used for additional filtering of noise, taking into account the nature of objects. The parallel use of mathematical models and real objects in a neural network for determining the coordinates of signals and their characteristics is proposed, which leads to an increase in accuracy for each type of object, the possibility of constructing intelligent control devices for outer space. Using the example of an experimental installation of two synchronously movable optoelectronic systems, the accuracy of combining images of objects in multiplexing systems from different digital sources is demonstrated.
VIBRATION DIAGNOSTICS OF ELECTROMECHANICAL COMPLEXES OVER 40 KW
Authors: Gordeev B. A. , Okhulkov S. N. , Ermolaev A. I. , Makarskov A. A. , Osmekhin A. N.
Published: January 2023

Measurements were carried out at different points of the machine and workshop using the vibrometer “Vibran 2.2”. At the step of studying vibration spectrograms it was found that shock loads significantly prevail over vibration, and the main harmonic of vibration is characterized by a frequency of 7…8 Hz corresponds to the rotation frequency of the middle shafts of the machine. Theoretical methods have established the cause of the progressive vibration generated by the rotation of the massive shafts of the paper-making machine caused, on the one hand, by the bearings wear accompanied by deformation of the rings and mutual displacement of their axes of rotation and, on the other hand, by an increase in the radii of the eccentricity of the shafts, leading to increase in dynamic loads acting on the bearing units. The authors of the article, who are directly involved in the vibration diagnostics of the machine came to the conclusion that in order to reduce its vibration it is enough to replace bearings with new ones which due to prolonged operation (more than 25 years) and the influence of vibration and shock loads have long worked out their service life.
GEOMETRIC MEASUREMENTS USING MICROWAVES
Authors: Matveev V. I.
Published: January 2023

The article presents an overview of methods for measuring geometric parameters – the thickness of dielectric materials and products using ultrahigh frequency radio waves. The main methods of thickness measurement are considered: geometric, amplitude-phase, frequency-phase, ellipsometric, with examples and characteristics of their practical application. The schemes of implemented microwave thickness gauges and converters are given.
IDENTIFICATION OF TEMPERATURE SENSITIVITY DETECTOR ON FIBER BRAGG GRATING (FBG) SENSOR
Authors: Aniskovich V. A. , Budadin O. N. , Kozelskaya S. O. , Kutyurin Yu. G. , Rykov A. N.
Published: January 2023

The article presents the results of work on the study of the dependence of the results of temperature measurements using fiber Bragg gratings (FBGs). It was found that FBGs not only have different initial sensitivity, but also exhibit nonlinearity even in a narrow temperature range (from –30 to +70 °C). It is shown that to use the FBG as temperature sensors, it is necessary to precalibrate the FBG by temperature.
DEVELOPMENT AND DETERMINATION OF THE MAIN PERFORMANCE INDICATORS OF THE CALIBRATION PLATE BASED ON A COMBINATION OF CONCRETE AND GLASS
Authors: Chernov V. Yu. , Magalyas N. A. , Anisimov E. A. , Saldayeva E. Yu.
Published: January 2023

The work considers a surface plate, designed and manufactured from glass and reinforced concrete as a working surface and the base of the plate, respectively. The results of researching of the main metrological and operational characteristics of the plate are presented, such as surface flatness and irregularity of the working surface, the greatest surface deflection under the action of a distributed load. It has been established that the developed experimental sample of the composite plate is suitable for accuracy class 000 in terms of surface irregularity, and for other characteristics, it does not even suit for accuracy class 3. In addition, the reasons are identified and further directions for improving the design and manufacturing method are established in order to improve the metrological and operational characteristics of the composite plate
APPLICATION SOFTWARE DEVELOPMENT FOR THE GEOTECHNICAL MONITORING SYSTEM OF GAS PIPELINES
Authors: Gulyaev I. V. , Stepanov S. E. , Vasenin A. B. , Kosorotov A. A. , Kryukov O. V.
Published: January 2023

The article considers a scientifically based approach that ensures trouble-free operation of large-scale distributed production facilities using a set of measures, one of the components of which is an automated monitoring system. A procedure for automated collection of a large array of data from the entire object in a relatively short period of time with automatic interpretation and visualization of information in forms convenient for decision-making is proposed. It is shown that one of the most important indicators of the functioning of pipeline transport is the level of the stress-strain state of the metal, which depends on internal and external factors – the parameters of the transportation process, the state of the pipeline metal, ground movement and other meteorological and technological factors. At the same time, the integration of the monitoring system with automated systems for planning and carrying out routine maintenance and repair work, as well as closer integration with automated process control systems and dispatch control systems, is very significant. As a result of the creation of such a system of integrated monitoring of the gas pipeline, data exchange speeds are increased, their analytical processing is provided, as well as rapid visualization on the control room operator's workstation. The implementation of these procedures for automatic interpretation and visual representation of large volumes of incoming information contributes to the support of operational decision-making during the operation of oil and gas pipelines in adverse environmental conditions.
TESTING OF CFRP SPECIMENS WITH IMPACT DAMAGE USING THE ACOUSTIC EMISSION METHOD AND TENSOMETRY
Authors: Seryeznov A. N. , Stepanova L. N. , Kabanov S. I. , Ramazanov I. S. , Kuznetsov A. B. , Chernova V. V.
Published: January 2023

Samples of carbon fiber T 700 were researched. They were subjected to impact damage, after which they were loaded with a static load until failure. Registration of defects was carried out using the method of acoustic emission (AE) and tensometry. In the process of loading the samples, the deformation and load were determined, at which the AE signals were located. An antenna consisting of piezoelectric acoustic emission transducers (PAE) and fiber optic sensors (FOS) was used to monitor defects. When the load changed from 80 to 100 kN, a jump in mechanical stresses was observed in the samples from 338 to 432 MPa, registered by the certified microprocessor-based high-speed tensometic system “Dynamics-3”. In this case, the average amplitude of the AE signals significantly decreased, starting from the load P = 80 kN, after which it increased at the load P = 110 kN. For sensors PAE 3 and VOD 2, located on the opposite side of the sample, where impact damage was absent, these changes in the amplitudes of the AE signals were less pronounced.
HIGH-FREQUENCY OSCILLATORS OF SWINGING FREQUENCY IN THE OUTPUT CIRCUITS OF MAGNETOELASTIC TORQUE SENSORS
Authors: Vanyagin A. V. , Gordeev B. A. , Okhulkov S. N. , Ermolaev A. I.
Published: January 2023

To automate the operation of power units of vehicles and machining centers, it is necessary to develop reliable methods and means of measuring the main parameters characterizing their operation: torque, shaft power, axial shaft force, etc. Contactless magnetoelastic torque sensors are distinguished by high operational suitability, the measuring circuits of which, however, are obsolete and do not meet the increased requirements for measurement accuracy. The paper presents the design and describes the principle of operation of a contactless magnetoelastic torque sensor, a comparison of existing measuring circuits is given. The authors proposed a new technical solution for measuring torque, implemented on the basis of a phase shift meter with broadband frequency modulation of oscillators of swinging frequency. The test results of the prototype of the new measuring circuit demonstrated high accuracy and sensitivity compared to traditional measuring circuits. The new measuring circuit is not susceptible to errors in the electrical parameters of electronic components.
AUTOMATIC DETECTION OF SURFACE DEFECTS OF CERAMIC TILES
Authors: Kadhim M. Kh. , Rusinov L. A.
Published: January 2023

Ceramic tiles are one of the most demanded finishing materials, and the areas of their use are constantly expanding. The production of ceramic tiles is quite well automated, but the control of manufactured tiles for defects is usually not automated, that limits its speed and does not guarantee the necessary quality. The algorithm for detecting the main surface defects of ceramic tiles, namely, mechanical (scratches, cracks, etc.), geometric (chips on the corners, gouges or protrusions on the edges), color defects (blobs, spots, etc.) is proposed in the paper. It based on digital image processing of tiles and was implemented using the free library of algorithmic primitives OpenCV. The algorithm does not require the presentation of reference tiles. At the same time, a high speed of classifying monochrome tiles into fresh and defective ones is ensured and allows to organize the automatic control of plain tiles on the conveyor in real time with the probability of correct detections 97 %.
POSSIBILITY OF IDENTIFYING DEFECTS IN MASSIVE CAST STRUCTURES BY NON-DESTRUCTIVE TESTING METHODS
Authors: Shlyakhtenkov S. P. , Gulyev M. A. , Vyplaven V. S. , Popkov A. A. , Bekher S. A. , Kurbatov A. N. , Bobrov A. L.
Published: January 2023

In the context of improving methods and means of non-destructive testing (NDT), along with increasing in formativeness, complex technical problems arise. For example, when examining structural elements with a service life of more than 20 – 30 years, modern NC tools detect defects that have not been rejected by the manufacturer. Assessment of the impact of such defects on the operability of the structure requires a comprehensive study using NC and strain gauge. The purpose of the work is to evaluate the parameters of defects in a cast part of a hydraulic stamping press with a service life of more than 60 years in order to make a decision on the possibility of its further operation. The defect was investigated using magnetic powder, eddy current and ultrasonic control methods. By means of strain gauges, mechanical stresses are measured directly during operation. The indicator pattern of the magnetic particle inspection defect has signs uncharacteristic for fatigue defects: branching, intermittent and broken (not smooth) character. To quantify the degree of smoothness of the indicator pattern, it is proposed to use a fractal dimension, which for the defect under study was 1.07. The estimated depth of the defect detected by the eddy current method was from 4 to 6 mm, by ultrasound – from 8 to 18 mm. The presence of an echo signal by a direct converter indicates the volumetric nature of the defect. After mechanical removal of the surface layer with a thickness of 2 mm in some areas, the width of the defect increased to 2 mm, and the depth to – 20 mm. On the inner side surface of the defect, a dense, dark scale characteristic of high temperatures is visually determined.The defect is classified as a casting shell with a depth of 20 mm. No traces of fatigue failure were found. Compressive mechanical stresses with an amplitude of no more than 41 MPa amounted to less than 20 % of the fatigue endurance limit of 35L steel. During the year, the average number of working cycles is 20 thousand, repeated examination of the press defect is recommended in 5 – 10 years (100 – 200 thousand cycles).
THE PALLADIUM COMPLEXES DURING THERMAL DECOMPOSITION PHASE COMPOSITION INVESTIGATION
Authors: Boriskin O. I. , Larin S. N. , Nuzhdin G. A. , Murav’eva I. V.
Published: January 2023

In palladium refining technologies, as well as in some analytical procedures, complexes of bivalent palladium with diimines, amines, oximes, thiourea, and other compounds are used. In the technologies used, complex compounds of palladium are subjected to thermal decomposition, during which metallic palladium is formed. The precious metals market is seeing a rapid rise in the price of palladium on the back of a rapid increase in demand for it. It has been experimentally shown that active decomposition of dichlorodiamminepalladium Pd(NH3)2Cl2 and dimethylglyoximpalladium (C4H7N2O2)2Pd occurs at temperatures of 200…250 °C. Only the diffraction maxima of palladium were observed on the X-ray diffraction patterns of samples that underwent heat treatment at 900 °C and above. At these temperatures, palladium oxide is not stable. At temperatures around 500 °C, the samples are almost completely oxidized; there are no reflections of palladium on the diffraction patterns.
ANALYSIS OF METHODS AND TECHNICAL MEANS OF AUTOMATED DIAGNOSIS OF EARLY ALOPECIA IN CHILDREN
Authors: Dengaev A. M.
Published: January 2023

The purpose of automated diagnostics is to obtain complete and reliable information about the disease. The article analyzes in detail the pathophysiology of alopecia: possible causes of the increase in cases of alopecia in children, factors influencing the development of alopecia, methods and technical means of automated diagnosis of alopecia. The main purpose of the study is a comparative analysis of methods and technical means of automated processing of medical images of alopecia. A mathematical interpretation of the medical image recognition system is given. A multilevel architecture of such a system with a description of all the components of the modules is proposed.
ON THE INFLUENCE OF THE PARAMETERS OF THE ELECTRIC EXCITATION PULSE OF A PIEZOELECTRIC PLATE OF A NORMAL PROBE ON THE CHARACTERISTICS OF THE FREQUENCY SPECTRUM AND PULSE OF THE RECORDED ECHO SIGNAL
Authors: Danilov V. N.
Published: January 2023

On the basis of computer modeling of the electro acoustic channel of a normal probe for a reflector in the form of a bottom surface, the influence of some typical forms and corresponding frequency spectra of the electric pulse of excitation of the piezoelectric plate on the characteristics of the frequency spectrum and pulse of the recorded echo signal is considered. Calculations of signals using an exciting pulse in the form of a voltage jump (step), in the form of half a sine wave and a rectangular shape have shown the feasibility of using rectangular pulses with a duration equal to half of the oscillation period at the nominal frequency of the probe. The maximum of the pulse envelope of the recorded bottom echo for the excitation pulse of a rectangular shape piezoelectric plate is approximately twice as high as the maximum of the envelope when the piezoelectric plate is excited by a pulse in the form of a jump and a quarter more than the maximum when excited by a semi sinusoidal pulse for the nominal frequencies of the probes 2.5 and 5.0 MHz.
MAGNETОELASTIC ELECTROMAGNETIC-ACOUSTIC TRANSFORMATION. PART 8
Authors: Komarov V. A.
Published: January 2023

The generation of zero-mode Lamb waves in a magnetoelastic conductive plate with a thickness of 2d is considered at the constraint qt d < 1 using a radiation source model in the form of spaced apart conductors with alternating currents of opposite phases. It has been shown that, in contrast to bulk waves, Lamb waves are formed by the interference of the incident at angle φ and reflected waves under the condition sinφ > 1. Expressions are obtained for projections of displacements of symmetric and antisymmetric modes under the Joule effect, and expressions are given for projections of displacements under the Wiedemann effect. Diagrams are presented showing that the highest generation efficiency occurs in the first variant at the increased electrical conductivity of the plates. In the second case the highest generation efficiency appears at low electrical conductivity of the samples.
WAVELET DENOISING FOR LOW STRAIN PILE INTEGRITY TESTING
Authors: Lozovsky I. N. , Loseva E. S. , Syasko V. A.
Published: January 2023

Low strain impact test is widely used to assess the structural integrity of reinforced concrete piles due to its high productivity and cost effectiveness. However, a low signal-to-noise ratio may prevent proper evaluation of pile length and integrity using the standard data analysis approaches. In this paper, we propose a technique for the time-frequency analysis of low strain test data, which allows us to separate the useful components of a signal from the unwanted ones. The technique is based on the continuous wavelet transform with the complex Morlet wavelet, which is shown to be the most suitable for the low strain test data decomposition. To filter the signal, the moving median of the square modulus of the continuous wavelet transform is calculated in the frequency band of the initial impact pulse. The capabilities of the technique are illustrated by the low strain test signals with the artificial noise and the results of a field test of a 30m long bored pile.
Do We Really Need a New Journal of Nursing?
Authors:   The Hashemite University, Al-Motlaq Mohammad
Published: January 2023

N.A
Effectiveness of an Online Educational Program about Vaginitis ​in Improving Knowledge among College Female Students in Jordan
Authors:   Jordan University of Science and Technology, Alnuaimi Karimeh , Abujilban Sanaa , Abuzeiad Muna
Published: January 2023

Background: Female reproductive tract infection including vaginitis is considered as one of the most public-health issues and is known as a silent epidemic that might affect adolescents. Educational health programs are very effective in improving adolescent knowledge and practices regarding vaginitis and its preventive measures. Aim: The aim of this study was to assess the effectiveness of an online educational program in improving first-year college girls’ knowledge about vaginitis and its preventive measures in Jordan. Methods: A convenience sample consisting of 120 participants of first-year college female students were recruited and randomly assigned into intervention and control groups. A pretest was conducted for both groups and a post-test was conducted 2 weeks after the intervention for both groups. Findings: The results showed a significantly higher mean in the intervention group (M= 26.17; SD= 3.24) compared to the control group (M= 17.49; SD = 5.91) after conducting the educational program (p<0.00), which means that the educational program about vaginitis is effective in improving girls’ knowledge. Conclusions and Recommendations: Using short 2-hour lectures, using effective online and high-tech teaching methods and good follow-up would be very beneficial to improve the knowledge level among adolescents. Keywords: Vaginitis; Effectiveness of educational program; Adolescent girls; Knowledge; Preventive measures; First year college students.
DEVELOPMENT OF SINGLE-INDUSTRY REGIONS IN THE ECONOMIC SPACE OF RUSSIA: COMPARATIVE ANALYSIS
Authors: Danilova Irina , Pravdina Natalya
Published: January 2023

The article is devoted to the analysis of the directions of the economy structure development of single-industry regions, the specific features of the “industrial transition” with a focus on strengthening sectoral diversity, which is typical for all countries of the world. The purpose of the study has been to substantiate the existing development tracks in relation to the position of the core industry and changes in the level of manufacturability of the activities of the region's space. The study has been carried out on the example of four regions of the Russian Federation specializing in the metallurgical industry (Lipetsk, Vologda, Chelyabinsk regions, and Krasnoyarsk Territory). The methodology of the work is based on the theory of new economic geography and the uniqueness of the territorial economy even of regions similar in terms of single industry. Modern methods, coefficient and correlation analysis have been used to compare the types of activities by the Russian National Classifier of Economic Activities and the principles of grouping branches of the Eurostat from the standpoint of the manufacturability of sectors. As a result of assessing the structure of the regional economy and cross-interactions between industries, alternative options for the development of metallurgical regions have been substantiated from the standpoint of the role of a single industry and the activity of sectors of different levels of manufacturability. An increase in the presence of industries not assessed by the level of manufacturability (Lipetsk Region and Krasnoyarsk Territory) and strengthening in the regions of medium-high manufacturability activities (Vologda and Chelyabinsk regions) have been revealed. It is concluded that cross-interaction between medium-low and medium-high industries is activated in regions with intra-industry diversification (both within the metallurgical and machine-building industries, as in the Chelyabinsk Region). The practical significance of the findings lies in the development of an analytical platform for the formation of a strategy for the development of basic sectors of the economy and monitoring its implementation.
DIGITALIZATION IN THE BANKING SECTOR: RUSSIAN PRACTICES
Authors: Krinichansky Konstantin , Nurislamova Nataliya
Published: January 2023

The penetration of digitalization into the banking sector poses many questions for managers and owners of banks, it challenges experts and researchers. The study examines the main directions and effects of digitalization in the banking business. The focus is put on the relationship between the level of digitalization of banks and such indicators of their activities as the size of loans, deposits, return on equity and, in addition, metrics designed to measure the customer base of banks. The purpose of the work is to develop a methodological approach to assessing the above-mentioned relationship, as well as to test the null hypothesis, which consists in the fact that there is no relationship between the level of digitalization of banks and the indicators of their activities mentioned above. The object of our study in the broad sense is the national banking system as a field for the implementation of digital solutions and innovations and adopting competitive strategies. In a narrow sense, we examine a sample of the 20 Russian credit institutions most advanced in terms of digitalization. The companies for the study have been chosen based on expert assessments and stratified selection, which assumes that the objects share certain uniform properties for comparison. In accordance with the objectives, ranking methods, correlation and comparative analyses have been used. The result of the study can be formulated in the following theses. Despite the acknowledged progress in digitalization of Russian banking sector, cross-sectional analysis does not reveal a significant relationship between the level of digitalization of Russian banks and the main indicators of their activities. The positive correlation can be traced in relation to the “number of active users” indicator. This result can be explained by the fact that 1) the relationship between the considered metrics is indirect, 2) the return on the innovative technologies used by banks has a delayed effect, 3) new strategies (for example, forming of ecosystems) direct banks’ investments to other fields beyond the banking sector and cause insignificant correlation of these investments with the indicators of the size of the loan portfolio or the volume of deposits.
Are the Exiting Quality of Life Measures Appropriate for Muslim Patients with Cancer?
Authors: Widyaningsih Susana , Petpichechian Wongchan , Kitrungrote Luppana
Published: January 2023

Purpose: This article aims to review the appropriateness of five general quality of life (QoL) measures for the Muslim patients with cancer.Method: The literatures related to QoL in patients with cancer, published between 1981 and 2011 were critically reviewed. Several database databases including CINAHL, MEDLINE as well as PUBMED, ProQuest, Elsevier, Google scholar and reference list were included. There were 25 articles best fit the inclusion criteria. Books and journal articles addressing Islamic principles were also reviewed.Result: QoL is a complex, multidimensional, and subjective phenomenon. It has been defined differently but overlapping by many scholars in the field. The patient’s QoL is important since it is one of the indicators of quality cancer care. The EORTC QLQ C30, FLIC, McGill QoL are the examples of widely used QoL measures which are appropriate to be applied in Muslim cancer population, while the FACT-G and CARES SF need to be revised in some of their items. Issues related to Islamic principles are discussed to support needs of further revision of these QoL measures.Conclusion: Most of the QoL measures’ items are not conflicting with the Islamic principles, except some items. Psychometric properties of the revised measures appropriate for Muslim cancer population should be further examined so that applying these measures can provide valid findings. Furthermore future cross cultural study may be possible.
Quality of Life (QoL) in patients with Traumatic Brain Injury (TBI): A Literature Review
Authors: Sukraeny Nury , Songwathana Praneed , Sae-Sia Wipa
Published: January 2023

Purpose: To describe the definition of quality of life (QoL) and identify the most appropriate tool for QoL assessment used in patients with TBI.Method: Searching was conducted from PubMed, CINAHL, EBSCO, and ProQuest during 2000-2011. A total of 33 studies were analyzed for this review consisting of 9 review studies, 2 intervention studies, and 22 descriptive studies.Result: Two important definitions of QoL were used in studies related to TBI namely achievement and subjective well-being. Although varieties of generic measurements have been used to measure QoL in TBI patients, there was a lack of TBI-specific Health-related Quality of Life (HRQoL) instrument. Despite the different approach and time measured either short or long outcomes, appropriate domains of QoL tool seem essential particularly among those with moderate and severe TBI.Conclusion: QoL is a wide concept which can be defined in several dimensions. The QOLIBRI as a new disease-specific QoL measurement in TBI seems a feasible and valid approach for the assessment of QoL in TBI. However, the application across cultural remains a challenge and needs a validation.
The Competencies, Roles and Scope of Practice of Advanced Psychiatric Nursing in Indonesia
Authors: Wardani Yulia
Published: January 2023

The graduate advanced psychiatric nursing (psychiatric nursing specialist) from master degree in Indonesia are about 70 nurses, 67 nurses were graduated from University of Indonesia. They are working at mental health services and educational setting around Indonesia and yet seem not ready to perform some specific advanced competencies in clinical area. The mastery on mental health assessment, neurochemical perspectives, medical management and psychotherapy have not yet performed by the psychiatric nurse specialist in the clinical area or community.To have those competencies and its performances, therefore the curriculum in a psychiatric nursing graduate program must include advanced courses in physiopsychology, psychopathology, advanced psychopharmacology, neurobehavioral science, advanced mental health assessment, and advanced treatment interventions such as psychotherapy and prescription and management of psychotropic medications as their core and major courses in the curriculum. Those courses should be performed in their clinical practice courses or other related learning experiences. When those qualifications are met, then they are competent to be called advanced psychiatric nurse.As advanced practice registered nurses, the advanced psychiatric nurses should be able to demonstrate their direct expertise and roles in advanced mental health assessment, diagnostic evaluation, psychopharmacology management, psychotherapy with individuals, group and families, case management, millieu management, liason and counselling from prevention, promotion until psychiatric rehabilitation. Meanwhile the skill such as psycho-education, teaching, unit management, research and staff development can be added as their indirect roles.
Nurses’ Patient Safety Competencies in Aceh Province, Indonesia
Authors: Julianto Rahmad , Thiangchanya Pratyanan , Boonyoung Nongnut
Published: January 2023

Purpose: To determine the level of nurses‟ patient safety competencies in Aceh, Indonesia.Methods: A descriptive study was conducted to randomly recruit 207 nurses in a hospital in Banda Aceh, Indonesia. The nurses‟ patient safety competencies was measured by using the Patient Safety Competencies of Nurses Questionnaire (PSCNQ) which was a self-reported, 29-item questionnaire rated on a 4-point Likert scale (1 to 4), developed based on the Canadian Patient Safety Institute‟s Safety Competencies. Result: More than half of nurses participated in the study were less than 30 years old, with a mean age of 31 years. The majority was female, married, earned diploma degree, and had working experience of 1-10 years. The overall nurses‟ patient safety competencies was at a high level. The area that nurses reported highest competency was “use personal protective equipment”. Whereas the area they reported lowest competency was “maintain the documents of adverse events and report each adverse event.”Conclusion: The study findings suggested that Acehnese nurse leaders should further maintain and promote nurses‟ patient safety competencies. Studies exploring factors contributing to nurses‟ patient safety competencies together with utilizing other data collection methods, such as observation is worth investigated.
Male Partners’ Involvement Towards Prenatal Screening And Diagnostic Testing For Down Syndrome
Authors: Kusumaningrum Niken , Choi Christina , Yeo George S.H.
Published: January 2023

Introduction: Now, male partners’ involvement in prenatal screening and diagnostic testing for Down syndrome is becoming increasingly recognized as well to ensure that parents are well informed of the risks and benefits of screening. The aim of study was to understand the degree of male partners’ involvement during pregnancy in Singapore population. Methods: A cross-sectional survey of male partners’ attending prenatal counseling was performed. The instrument used to measure the level of involvement is a self-assessment questionnaire that identifies the role of male partners with a Likert scale. Descriptive statistics was used to analyze data gained. Result: A total of 107 participants completed the questionnaire. Sixty-seven percent of male partners were found to have a highlevel of involvement while 32.7% was found to have a medium level of involvement. Most of them stated that women can pursue prenatal testing without their permission. Male partners found it more important for them to accompany their spouse to amniocentesis or CVS than to the Down syndrome screening test. When participants were asked about how much information about Down syndrome they sought prior to the appointment, how much discussion they had with their spouse about Down syndrome testing, and about whether they or their spouse should be the first person to receive test results, most stated that they were undecided. Conclusion: These results revealed that male partners were very well involved in the Down syndrome testing during pregnancy and future studies should assess possible underlying factors that influence male partners’ involvement.