Results Of Experimental Research Research Articles

Socio-cultural aspects in the humanistic education of modern youth

The article examines the sociocultural strategic aspects of moral education of modern schoolchildren, based on innovative pedagogical technologies and aimed at shaping the personality on the basis of humanistic and universal values. Social institutions have a purposeful influence on personality development, through which social and cultural experience is reproduced in the individual's consciousness, behavior, and activities. As a result, moral character is formed, characterized by the individual's value-based attitude towards the world, oneself and others, nature, work, and education. These attitudes are grounded in values accepted by society, primarily universal ones. The dominant focus is on the formation of basic humanistic values. Thus, the article aims to prove the importance of the sociocultural aspects of humanistic education for modern schoolchildren and the formation of tolerant interpersonal relationships. Theoretical research methods used in the study include comprehensive, comparative, and retrospective analysis of the literature, along with various empirical methods. In the experimental work, a traditional approach was employed using control and experimental groups of respondents. Methods of mathematical statistics allowed to verify the reliability of the experimental research results. The practical significance of the research consists in the thorough analysis of the socio-cultural aspects of humanistic education, the application of theoretical principles and conclusions to specific scientific and methodological recommendations for the humanistic education of schoolchildren, and the development, testing, and implementation of innovative pedagogical technologies and active forms of educational work with secondary school students.

Oscillatory autophagy induction is enabled by an updated AMPK-ULK1 regulatory wiring.

Autophagy-dependent survival relies on a crucial oscillatory response during cellular stress. Although oscillatory behaviour is typically associated with processes like the cell cycle or circadian rhythm, emerging experimental and theoretical evidence suggests that such periodic dynamics may explain conflicting experimental results in autophagy research. In this study, we demonstrate that oscillatory behaviour in the regulation of the non-selective, stress-induced macroautophagy arises from a series of interlinked negative and positive feedback loops within the mTORC1-AMPK-ULK1 regulatory triangle. While many of these interactions have been known for decades, recent discoveries have revealed how mTORC1, AMPK, and ULK1 are truly interconnected. Although these new findings initially appeared contradictory to established models, additional experiments and our systems biology analysis clarify the updated regulatory structure. Through computational modelling of the autophagy oscillatory response, we show how this regulatory network governs autophagy induction. Our results not only reconcile previous conflicting experimental observations but also offer insights for refining autophagy regulation and advancing understanding of its mechanisms of action.

Process Analysis of Scientific Training for Technical Students

In the scientific training of technical specialists, the university provides for the process of teaching and preparing students for work in areas related to science and technology. In the process of teaching, the university ensures the development of fundamental scientific knowledge, practical skills, research work and the application of new technologies. This process is carried out through key components such as theoretical and experimental research, interdisciplinary research, analyzing data and research results, creating mathematical, statistical or computer models, conducting evaluations and experiments to solve interdisciplinary problems and practical tasks. In this work, the authors consider the problem of scientific training of technical specialists in the formation of scientific competence. The article shows the connection between scientific activities of technical students and the educational process, study was conducted and the results of the analysis of current regulatory and educational documents were shown, in which the relevant points and requirements for strengthening the scientific training of modern students are clearly stated. In the practical part of the article, the results of a survey of technical students of Abylkas Saginov Karganada Technical University were analyzed and demonstrated.

Computational and experimental studies of a pressure pulsation damper for pipeline systems

A generalized-structure analytical model of a pressure pulsation damper for pipeline systems is presented. The model was obtained using the four-pole method. The model is obtained in lumped and distributed parameters. The distributed-element model and finite element model are used for calculating the inherent characteristics of the pressure pulsation damper. The analytical distributed-element model takes into account the distribution parameters of the central inertial channel by introducing into the analytical model a matrix for the distributed element instead of the matrix of inertial resistance. A finite element parametric model of a two-stage reactive-type oscillation damper is developed in the Ansys software. Pulsation processes in the damper are modeled using acoustic analysis. The frequency-dependent coefficients of the damper transfer matrix are calculated for three models using three numerical experiments with a section of the pipeline system with the dynamic characteristics known in advance. The characteristic parameters of the pressure pulsation damper are calculated. These are the wave input impedance, wave output impedance and the inherent vibration damping. The calculation was carried out using analytical and finite element models. A single-stage reactive pressure pulsation damper is developed. The damper is designed in such a way that its settings such as the resistance of the jets and resonance tubes, the length of the central channel and the capacity of the expansion cavity can be changed. The results of experimental and numerical research of the inherent characteristics of a single-stage reactive of a vibration damper are presented.

Experimental research of a pumping engine in a micro-ORC system with a low-boiling medium

The paper presents the results of experimental research on a pumping engine with the low-boiling medium HFE-7100. The research was conducted in a micro-ORC system with an output of about 2.5 kWe. Among other factors, the impact of working medium temperature and pump rotational speed on the operating parameters of the gear pump and pumping engine is analyzed. The research shows that increasing the rotational speed and HFE-7100 temperature resulted in an increase in the power consumed by the pump drive and an increase in the effective power of the pump. The increase in the effective power of the pump was greater than the electrical power consumption of the pump drive, resulting in an increase in the volumetric efficiency of the pump. It has been established that, at a constant pump rotational speed of 2000 rpm, increasing the average temperature of HFE-7100 by 27 K from approximately 304 K resulted in a 4% increase in the pump's volu-metric efficiency to 80%. It has been established that, for any value of pump rotational speed and working fluid tempera-ture, there exists an optimal effective power value for the pump at which the pumping engine achieves the maximum efficiency.

Assessment of Surface Integrity in Precision Electrical Discharge Machining of HSS EN HS6-5-2C.

The integrity of the machined surface in precision wire electrical discharge machining (WEDM) of electrically conductive materials is one of the most important quality indicators. The integrity parameters of the machined surface are primarily monitored in terms of micro and macro geometry parameters. This paper presents the results obtained as a part of experimental research aimed at evaluating surface crack density (SCD) when machining EN HS6-5-2C using WEDM technology. The aim was to find a combination of main technological parameters (MTP) in order to minimize the qualitative indicators SCD and Ra of the eroded surface. The results of experimental research within the framework of the evaluation of SCD and Ra indicators were processed using the Taguchi method. The integrity of the eroded surface was examined by scanning digital microscope (SDM) after application of full and multiple offset cuts with an AC Brass LP 1000 brass wire electrode. Based on the experimental measurements performed, significant facts were discovered. It was found that the largest surface integrity defects are present after the application of full cuts and the first two offset cuts. At the same time, it was found that lower values of the SCD parameter in WEDM of EN HS6-5-2C steel were recorded at thicknesses above 130.0 mm. The SCD parameter was also confronted with the Ra parameter, and it was found that they are significantly influenced by MTP. The higher value of the peak current I (19 A) and the longer duration of the discharge ton (32 μs) result in an increase in the value of the SCD parameter from 0.005 μm·μm-2 to 0.0256 μm·μm-2. The resulting solutions are mathematical regression models (MRM), which allow the prediction of both monitored qualitative indicators with respect to their minimization.

High Performance of Anion Exchange Membrane Fuel Cells By Introducing Hydrophobic Carbon Nanotube Diffusion Layer

In recent years, anion exchange membrane fuel cells have garnered significant attention due to their ability to utilize low platinum group metal catalysts, thereby reducing manufacturing costs. In contrast to proton exchange membrane fuel cells, anion exchange membrane fuel cells have a distinctive operational characteristic where they produce water at the anode electrode while consuming water on the cathode electrode. The primary challenge hindering their advancement is managing water, specifically addressing the uneven distribution of water between the anode and cathode. As one of the crucial components of the fuel cell, the gas diffusion layer conducts electrons from the catalytic layer to the bipolar plate, transports reaction gases to the catalytic layer for electrochemical reactions, and removes excess water and waste heat generated on the anode electrode. Carbon nanotubes have high specific surface area, superior electrical conductivity, excellent mechanical properties, and inherent hydrophobicity due to their high degree of graphitization, and are considered to be promising materials for optimizing mass transport within gas diffusion layers. Abundant carbon nanotubes are synthesized in situ on carbon fibers to create a three-dimensional network structure, which not only provides more attachment sites for catalytic particles but also facilitates the electron flow path by interlacing carbon nanotubes within the catalytic layer.In this work, the iron-cobalt catalyst was uniformly sprayed onto the gas diffusion substrate through ultrasonic spraying technology. The carbon source atmosphere was ionized and deposited under plasma radio frequency to synthesize abundant carbon nanotubes in the radial direction of the carbon fibers. Contact angle measurements revealed that the carbon nanotube-modified gas diffusion layer exhibited an approximate contact angle of 145°, which was significantly greater than that of the commercial gas diffusion media. Experimental research results indicated that, under various lower relative humidity conditions, when the cathode and anode inlet flow rates were set at 0.3 L/min and 0.5 L/min, respectively, the peak power generated by the membrane electrode assembled with the carbon nanotube-modified gas diffusion layer reached 988.9 mW/cm². This represents a substantial 27.1% increase compared to the performance achieved using the commercial gas diffusion layer. Upon further increasing the cathode and anode inlet flow rates to 0.6 L/min and 1 L/min, respectively, and operating under different higher relative humidity conditions, the membrane electrode assembled with the carbon nanotube-modified gas diffusion layer exhibited a peak power of 1031.7 mW/cm². In stark contrast, the commercial gas diffusion layer achieved only 760.6 mW/cm² under similar conditions. Through equivalent circuit and electrochemical impedance test analysis, it can be seen that the carbon nanotube-modified gas diffusion layer can effectively improve concentration polarization loss and ohmic polarization loss.

A dimensional exploration and scale development study of algorithm aversion

The increased use of AI in business has spurred an explosion in algorithm aversion research. The absence of scientific measurement instruments has caused the empirical research on the structural dimensions and measurement scales of algorithm aversion to stagnate, and the field is currently just in the exploratory stages of investigation. The results of experimental research and polls on algorithm aversion and appreciation may not be as broadly applicable as they may be because roughly two thirds of them used U.S. samples. Thus, extending from previous research, this work applies grounded theory to investigate the dimensionality of the structural dimensions of algorithm aversion using data from Chinese user interviews as well as the MicroBlog, Zhihu, and CSDN corpus. The scale was tested through the processes of questionnaire, exploratory factor analysis, and validation factor analysis to construct the scale of algorithmic aversion. The study finds five dimensions of algorithm aversion: Algorithm power gameplay, Algorithm user lock-in, Algorithm cognitive bias, Algorithm recommendation preference, and Recommendation algorithm adoption. The scale has a good level of validity and reliability and comprises 22 items. The findings of this study will support theoretical underpinnings for AI marketing and practical research on algorithm aversion in recommendation systems.

Assessment of the impact of intensification of heat exchange processes in heaters on power unit efficiency

In various spheres of modern industry, including power engineering, the issue of low efficiency of operation of heatexchange equipment, where condensation of vapour-gas media occurs, is a significant concern. It is known that one of the effective ways of solving this problem is intensification of heat exchange processes by transitioning from the traditional film condensation mode to the droplet condensation mode. A promising and technically straightforward way to achieve the droplet mode of condensation is a method based on the treatment of heat-exchange surfaces using a surfactant – octadecylamine (ODA). The analysis of studies, in which results of experimental research and industrial implementation are given, has shown that application of the specified method in conditions of condensation of water steam promotes formation of a stable droplet mode of condensation; as a result, the heat transfer coefficient on the steam side can more than double.Equally important and interesting is the question of how the efficiency of heat exchangers impacts the overall efficiency of complex systems, in which they operate. In this study, we examined the effect of the operational efficiency of network and regenerative heaters on the energy efficiency and economic performance of a power unit based on steam turbine unit T-110-12,8-3 operating in the heat recovery mode. To this end, we calculated the thermal scheme under various operating conditions of these heat exchangers and determined several key efficiency indicators, including the fuel heat utilisation factor (HUF) and electrical efficiency (EE). It is revealed that intensification of heat-exchange processes by a factor of 2 in horizontal delivery water heaters (HDWH) or in low-pressure heaters (LPH) significantly enhances the efficiency indicators of the power unit as a whole. At the same time, as the analysis of calculation results showed, the greatest benefits are realized when this measure is implemented in HDWH.

Diagnosing the Process of Forming Biofuel Combustion Mixtures in Diesel Engines by a Program to Compute Spray Volume

A diesel engine's injection and combustion mixture formation process are essential; it determines the engine's economic, technical, and environmental criteria. When the engine uses biofuel, fuel parameters such as viscosity, density, and surface tension affect the above process. Each engine using a specific fuel type will have to adjust injection parameters such as injection pressure and timing to ensure the injection process and formation of a homogeneous air-fuel mixture. Therefore, through the spray structure, it is possible to diagnose the process of combustion mixture formation, thereby making adjustments to the fuel injection system that will improve engine performance and reduce emissions of toxic exhaust gases. In this study, the article presents the content of building a program to compute spray volume using Matlab software. Through the spray volume, quickly diagnose the process of forming the biofuel-air mixture in the diesel engine combustion chamber, thereby determining the appropriate fuel injection system adjustment. Results of simulation and experimental research on 4CHE Yanmar engines installed on fishing vessels with fuel types DO, B5, B10, and B15 show that the B15 fuel mixture when used for the engine needs to be increased injection pressure is about 10% higher than DO fuel injection pressure.

ВОЗМОЖНОСТЬ ИСПОЛЬЗОВАНИЯ ЗОЛОШЛАКОВЫХ ОТХОДОВ СЖИГАНИЯ МУСОРА ДЛЯ ПОЛУЧЕНИЯ ТЯЖЕЛОГО БЕТОНА

Under the current trend of construction of incinerator power plants in Vietnam, research aimed at solving the problem of utilization of their ash and slag waste is necessary to create a closed-cycle economy. In addition, mass extraction of natural quartz sand negatively affects the ecological situation in the country. The most realistic way out of this situation is the use of synthetic sand as a fine aggregate. The purpose of this study was to obtain heavy concrete using ash and slag waste from incinerator power plant and artificial sand. The article presents the results of experimental research on the use of ash and slag waste from the Green Star incinerator for heavy concrete. Portland cement type CEM I 42,5 H of “But Son” plant, the synthetic sand obtained by limestone crushing, limestone crushed stone of 5 ÷ 10 mm fraction, fly ash, the finely ground bottom slag, the ceramic powder and water-reducing superplasticizer were used as raw materials for concrete production. The results of research showed the possibility of using up to 20% wt. % of the fly ash and the finely ground bottom ash for the production of the heavy concrete. The received concrete mixture has good workability, its mobility on cone settlement makes from 15 to 20 cm, and com-pressive strength of hardened concrete after 28 days makes more than 40 MPa. The obtained results open wide prospects for the use of ash and slag waste from incinerator in construction in Vietnam.

Electrically enhanced adsorption and photocatalytic properties of g-C3N4/TiO2 heterostructure for removal of tetracycline in water: A study by molecular dynamics simulation and experiment

Here, molecular dynamics (MD) simulations and experimental studies were carried out to investigate the effect and mechanism of external applied electric fields on the adsorption efficiency of g-C3N4/TiO2 heterostructure for removing tetracycline (TC) from water. The MD simulation results indicate that the electric fields in the X and Y directions have little effect, while the electric field in the Z direction has a significant impact on the adsorption system. The Z direction electric field significantly reduces the number of water molecules near the surface of the heterostructure, improves the adsorption energy between the heterostructure and TC molecules, and thereby enhances the adsorption effect. The experimental research results show that the removal rate of tetracycline increases from 26 % to 33 % in 90 min when an electric field of 3000 V/m is applied, which indicates that the presence of an external electric field can improve the adsorption and removal performance of g-C3N4/TiO2 heterostructure for TC in water, and verifies the research conclusion of MD simulations. Alkaline conditions are more conducive to the removal of TC. In addition, applying an external electric field can effectively improve the light absorption performance of heterostructures, thereby enhancing the photocatalytic degradation efficiency of TC.

The Effect of Pulsed Electromagnetic Field (PEMF) on Microvascular Autonomic Movement

This article aims to deeply explore the effects of Pulsed Electromagnetic Field (PEMF) acupoint stimulation on the autonomic movement of microvessels. Through a comprehensive analysis of related studies, the characteristics and mechanisms of action of PEMF are elaborated, and the physiological basis and importance of microvascular autonomic movement are introduced in detail. Combining a large number of experimental research results, the effects of PEMF on microvascular autonomic movement in various aspects are discussed, including the effects on vascular endothelial cells, smooth muscle cells, as well as the impact on hemorheology and microcirculation. At the same time, the potential and prospects of PEMF in clinical applications are analyzed, and prospects for future research directions are proposed.

Traceology suggests an unexpected use of antler cheekpieces from the Early Iron Age site at Gzin, Poland

Archaeological data confirm the widespread use of horse tack throughout the North European Bronze Age and the succeeding Hallstatt period in an inventory that included metal cheekpieces, phalerae, rein-knobs and other horse-related accessories. Similar usage has been assumed in the region of northern Poland, which has also furnished evidence for the use of horse gear accessories made of antler. This paper reports the results of traceological, isotopic and experimental research on three antler cheekpieces found at the Early Iron Age stronghold of Gzin in northern Poland and relates them further with archaeological and ethnographic patterns of horse exploitation. The results indicate that the artefacts from Gzin have rare comparanda and are isotopically consistent with the δ18Ow range of the site location, which can both be taken as evidence of their local origin. Moreover, traceological and experimental evidence from this study places the function and use of the analysed objects into a new light, undermining their use for horseback riding and suggesting that they were employed as cheekpiece coverings. Combined with the ethnographic record, ceramic iconography and archaeolinguistics, our findings fuel a discussion of deer valorisation during the Lusatian period in Poland, showing that the cheekpieces from Gzin may have served as elements of deer headgear.

Study of Deformation Performance and Seismic Damage on Pile-Supported Wharf by Shaking Table Test

Combined with the research results of shaking table test, through the deformation performance of steel pipe pile foundation, the seismic damage and seismic performance of steel pipe high pile wharf are evaluated, and the appropriate evaluation method is given. By setting the numerical analytical model of multi working condition steel pipe high pile wharf with different water depth, different pile types and different pile diameters, the limit displacement of the pile in the soil under different ground motions is calculated. The calculated results show that, the plasticity ratio (defined as μ = δu/δy ) of the structural system of steel pipe high pile wharf ranges from 1.5 to 3.0; and the fitting relationship between plasticity ratio μ and the diameter thickness ratio D/t was obtained. The fitting relationship is tested by the existing experimental research results. The results show that the given fitting relationship can be in good agreement with the experimental results in the range of ± 15%. On the basis of this fitting relationship, taking the diameter thickness ratio as the basic parameter, a seismic damage evaluation method of steel pipe high pile wharf structure based on deformation performance is proposed.

Dynamic processes in current sheets and experimental laboratory astrophysics

The results of experimental research of the dynamics of current sheets, which are formed in laboratory experiments at the IOF RAS, are presented as a brief review. It is shown that the most significant features of phenomena like solar flares can be reproduced in laboratory conditions. These features include the relatively slow accumulation of the magnetic energy in the course of the current sheet formation, the rapid release of the energy during the disruption of the current sheet, acceleration of plasma flows, ultrafast plasma heating, and effective particle’s acceleration. A qualitative similarity has been established between the basic characteristics of current sheets in the tail region of the Earth’s magnetosphere and in laboratory conditions. A comparison of a number of fundamental dimensionless parameters indicates the possibility of quantitative laboratory modeling of processes occurring in the magnetosphere. It is concluded that experimental research of the dynamics of current sheets and magnetic reconnection processes represent one of the promising areas of the laboratory astrophysics.

Load-bearing capacity of single and multi-anchor connections – theory vs results of experimental research (part 1)

Load-bearing capacity of single and multi-anchor connections – theory vs results of experimental research (part 1)

Analysing the Bioactive Compound of Earthworm Pheretima Javanica Extract by Using Gas Chromatography Mass Spectrum

Research Based Learning (RBL) is a learning method that uses contextual learning, authentic learning, problem solving, cooperative learning, hands on and minds on learning and inquiry learning. The STEM approach in learning is expected to provide meaning to students through the systematic integration of research-based knowledge, concepts and skills. STEM design begin with the identification of social problems. The social issue of typhoid fever cases caused by Salmonella enterica Typhi bacteria with a high mortality rate in the world is a public health problem. The existence of Pheretima javanica which is abundant in the environment can be utilized by conducting antibacterial activity testing and analysis of bioactive compounds by students on the form of the extract. This research is a development research carried out with the aim of developing a product and also a qualitative descriptive research which serves to provide an overview of the object. The steps in carrying out these tests were identified as part of learning that hone creative thinking skills. The results of the class experimental research showed that the N-Gain score was 0.8, which is in the high category. These results show that the application of developing problem-based learning tools with a STEM approach is effective. Learning outcomes contribute to the effort to find alternative drugs that are effective and do not cause resistance. In addition, students also produce scientific articles as learning products. This paper has implications for STEM integrated research-based learning.

Failure Analysis of Cu-DHP Joining Processes: A Comparative Study of FSW and SFSW Techniques

Abstract This article presents a failure analysis conducted on specimens extracted from 2.5 mm sheets of Cu-DHP (Cu99), which were joined using friction stir welding (FSW) and submerged friction stir welding (SFSW) processes. To evaluate the performance of the welded joints, destructive and non destructive tests, including tensile tests were performed. Additionally, morphologic analysis using scanning electron microscopy (SEM) combined with energy dispersive X-ray (EDX) and fractography investigations were carried out on the samples. The results of experimental research show refined microstructures both for FSW and SFSW welding. Improved mechanical properties have been obtained for SFSW welding, compared to FSW. SFSW specimens demonstrates superior tensile strength and a higher hardness compared to FSW specimens, by performing joining process underwater. The fracture surfaces of the tensile test specimens from the base material (BM), FSW and SFSW joints, revealed the ductile fracture mechanism of the joints. EDX analysis confirms compositional integrity of the base and welded metals. Results highlights suitability of the FSW and SFSW processes for joining of copper Cu-DHP.

The Influence of the Parameters of the Skew Rolling Process for Bimetallic Elements on the Mechanical Properties and Structure of Materials.

This paper presents selected results of theoretical and experimental research into the manufacture of axisymmetric bimetallic components using three-tool skew rolling technology. In the tests, it was assumed that the outer layer would be a material intended for heat treatment. However, low-carbon steel was used for the core. Experimental investigations were carried out in an innovative CNC skew rolling mill. Tests were carried out at different technological parameters of the process. In addition, the geometric parameters of the billet and the way it was heated were analyzed in relation to the quality of the resulting weld between the two materials. The quality of the weld was assessed based on metallographic observation and on strength tests (shear method). On the other hand, theoretical studies were based on numerical modeling (FEM). The numerical analysis made it possible to determine the distribution of temperature, deformation and stress in the rolling bimetallic component. The results obtained indicated that it is possible to produce bimetallic materials from the proposed steel grades. In addition, a significant effect of the method of heating the billet in the chamber furnace on the microstructure in the joining zone and the shear strength was found. There was an increase in Rc strength of about 35% when using oxidation protection. The results indicated better strength when the billet is rolling with a smaller outer layer thickness (about 50 MPa). This was confirmed by the results obtained from the FEM analysis, which indicated higher values of plastic strain and the occurrence of higher compressive stresses in the near-surface zones of the rolled bimetallic forging, both of which facilitate the welding process. From the temperature distribution (in the range of (600-1200) °C) obtained during the rolling of the bimetal forging, it can be seen that contact with cold tools does not affect the temperature in the welding zone.