bluuebunny/crossref_metadata_2025 huggingface dataset:
Viscosity of molten Cu–M alloys (M = Ni, Al)
Authors: Takeda Osamu , Ouchi Noritaka , Takagi Kounosuke , Sato Yuzuru , Zhu Hogmin
Published: June 2023

The viscosities of the molten Cu–Ni and Cu–Al alloys were measured using an oscillating crucible method over the entire composition range to obtain reliable data and examine composition dependence precisely. The measured viscosities of all alloys showed good consistency in heating and cooling processes, and the logarithmic viscosities showed good Arrhenius-type linearity, indicating that no considerable change in the liquid structure occurs in the temperature range studied. The composition dependence of the viscosity of Cu–Ni alloys was close to that defined by the additive law of logarithmic viscosities of pure components, whereas the composition dependence of the viscosity of Cu–Al alloys was far from that defined by the additive law, where the logarithmic viscosity increased with the addition of a small amount of Al and showed a peak. Over the peak concentration, the logarithmic viscosity monotonically decreased with further addition of Al. Deviations from the additive law of logarithmic viscosity of molten Cu–Al alloys at 1773 K were maximum at low Al concentrations; in contrast, the excess molar volumes of Cu–Al alloys showed minimum at low Al concentrations. The increase in viscosity in the low-Al-concentration region of the Cu–Al alloy is attributed to the decrease in the interatomic distance, which reduces the freedom of movement of atoms.
Measurement of the Normal Spectral Emissivity of Molten Oxide Using an Electromagnetically Levitated Complex Droplet of Molten Oxide and Liquid Fe
Authors: Sato Ryohei , Ishiwata Ryo , Taguchi Seijiro , Watanabe Masahito
Published: June 2023

We proposed the determination method of the normal spectral emissivity of molten oxides using a combination of immiscible molten oxides and liquid metals. We can determine the normal spectral emissivity of molten oxide from the ratio of the normal spectral radiance of molten oxides andliquid metals, using a commercially available pyrometer combined with an electromagnetic levitation system. In the present study, we measured the normal spectral emissivity of a molten oxide sample from SiO2-CaOFeO (SCF) ternary system and FeO using liquid Fe as the reference liquid metal. The normal spectral emissivity of the molten SCF sample with the composition of SiO2:CaO:FeO = 20:20:60 mass % was determined to be 0.78±0.01 and that of molten FeO to be 0.68 ± 0.03. Based on these results, we have discussed the relationship between the normal spectral emissivity and the electrical conductivity of molten oxides.
The Effectiveness of Neuromuscular Electrical Stimulation on Swallowing Function in Stroke Patients with Dysphagia: A Systematic Review
Authors: Purnama Pratiwi Aros , Kariasa I Made , Waluyo Agung
Published: June 2023

Dysphagia is a complication that often occurs and triggers the occurrence of aspiration pneumonia and death from stroke. Neuromuscular electrical stimulation (NMES) is a muscle strengthening therapy and sensorimotor recovery with electrical stimulation that can improve swallowing function. This study aims to find evidence of the effectiveness of NMES therapy on swallowing function in stroke patients with dysphagia. The method used in this research is a systematic review through online databases, namely: PubMed, ProQuest, Sciencedirect, and Wiley Online Library, on articles with full text criteria, using Indonesian or English, publications in the last 5 years, and a quasi-experimental research design and randomized controlled trials. Search articles using keywords "stroke", "cerebrovascular accident", "dysphagia", "neuromuscular electrical stimulation", "swallowing function", and "deglutitions function" combined using the boolean operator AND or OR. The search results found 10 articles that match the inclusion criteria. From 10 articles, there was 1 quasi-experimental article and 9 randomized controlled trial articles. The results showed that NMES could be an optional intervention to improve swallowing function after a stroke. Based on the reviews, NMES is effective in improving swallowing function in stroke patients with dysphagia; more high-quality evidence is needed to determine the proper procedure and other treatments that can be combined with NMES therapy.
The Morphology of Animated Images as an Approach to Design Educational Presentations
Authors: Wannas Aysar Fahem
Published: June 2023

The present study tackles the importance of animated images in educational presentations. It highlights the effectiveness of animated images and their compatibility with the mechanics of the eye and the brain in the process of perception and learning as one of the most important problems that have been identified by the researcher through reviewing the educational and training lessons published on the Internet platforms, in addition to the electronic lectures of many faculty lecturers. Therefore, the research problem stems from the following question; To what extent can the morphology of animated images contribute to enriching the design of educational presentations? The present study highlights some research indicators and many conclusions, results, and recommendations after completing the analysis of selected educational presentations published on Internet platforms.
Concept of Government Civic Responsibility in Administrative Law
Authors: Rajab Hashim
Published: June 2023

Administrative law is responsible for explaining an administrative rule and expressing the correct manner of an administrative lawsuit to provide administrative justice in public administration in the best way. One of the important topics of administrative law is government civil responsibility. The government, such as the ordinary people, is responsible for its actions and administration. And This responsibility requires that harmful action issued from the government, which causes damage caused by the legitimate action of the administration. The importance of research is that it paves one of the ways to know by that the relationship between administrative rights and civil rights and awareness of administrative rights in Afghanistan's legal system. This research is a descriptive and library of quotes and tries to simplify the authoritative sources of administrative rights in Afghanistan. The research findings show that the government must compensate for the actions and acts of their administration, which result from the person's losses. But which losses are compensable and which losses are not compensable? The administrative procedures law explicitly states that another law regulates the Government's civil responsibility. Because there is no specific law in this case, we must search for its rules in other country documents.
Desigualdades educativas (2008-2018)
Authors:   Red de Investigadores Educativos Chihuahua, México, Hinojosa Luján Romelia
Published: June 2023

Este apartado inicial tiene la intención de brindar al lector información que permita contextualizar la realización de este estado de conocimiento: la ruta de su construcción, la delimitación de lo que significa encontrar trabajos en esta área, la mirada teórica general del trabajo y finalmente un panorama descriptivo de los trabajos localizados. Un estado de conocimiento es una investigación de la investigación, es decir, una metainvestigación que recupera y valora la producción generada en un área del quehacer científico. Para este ejercicio se exige la compilación y análisis hermenéutico de la investigación producida durante un tiempo específico en un espacio acotado. La producción se organiza en líneas de generación o áreas de trabajo para su valoración. Implica una actividad hermenéutica en la que se requieren juicios valorativos de la producción, a partir de miradas teóricas sólidas y con actividades interpretativas realizadas con rigor metodológico Los resultados del estado de conocimiento arrojan la ausencia y/o presencia de productos, los enfoques teóricos y metodológicos predominantes, entre otras cosas. La tarea de realizar un estado de conocimiento es colectiva, no se plantea realizar en solitario.
Desigualdades educativas: las generalidades del área
Authors:   Red de Investigadores Educativos Chihuahua, México, Hinojosa Luján Romelia
Published: June 2023

Este apartado inicial tiene la intención de brindar al lector información que permita contextualizar la realización de este estado de conocimiento: la ruta de su construcción, la delimitación de lo que significa encontrar trabajos en esta área, la mirada teórica general del trabajo y finalmente un panorama descriptivo de los trabajos localizados. Un estado de conocimiento es una investigación de la investigación, es decir, una metainvestigación que recupera y valora la producción generada en un área del quehacer científico. Para este ejercicio se exige la compilación y análisis hermenéutico de la investigación producida durante un tiempo específico en un espacio acotado. La producción se organiza en líneas de generación o áreas de trabajo para su valoración. Implica una actividad hermenéutica en la que se requieren juicios valorativos de la producción, a partir de miradas teóricas sólidas y con actividades interpretativas realizadas con rigor metodológico Los resultados del estado de conocimiento arrojan la ausencia y/o presencia de productos, los enfoques teóricos y metodológicos predominantes, entre otras cosas. La tarea de realizar un estado de conocimiento es colectiva, no se plantea realizar en solitario.
Subárea Integración e inclusión educativa
Authors: Covarrubias Pizarro Pedro
Published: June 2023

De acuerdo con la Organización de las Naciones Unidas para la Educación, la Ciencia y la Cultura (UNESCO), en la educación inclusiva se reflexiona sobre cómo transformar los sistemas educativos a fin de que respondan a la diversidad y el respeto a los derechos humanos, erradicando prácticas de discriminación, segregación y exclusión. El principio fundamental de la inclusión es atender las necesidades de aprendizaje de todas y todos los niños, jóvenes y adultos, con especial énfasis en aquellos que son vulnerables a la marginalización y la exclusión, por tanto, la educación inclusiva es la respuesta apropiada a toda la serie de necesidades educativas en contextos pedagógicos, escolares y extraescolares donde convive la diversidad.
Presentación de la colección Estado de Conocimiento de la Investigación Educativa en Chihuahua 2008-2018
Authors:   Universidad Pedagógica Nacional del Estado de Chihuahua, México, Vega Villarreal Sandra
Published: June 2023

La Red de Investigadores Educativos Chihuahua (REDIECH) tiene la satisfacción de presentar la segunda colección de estados de conocimiento de la investigación educativa en Chihuahua, la cual es producto de un arduo trabajo colectivo que realizaron de manera coordinada algunos miembros de nuestra red, todos ellos investigadores comprometidos y con vasta experiencia en la generación de conocimiento en el campo de la educación. La colección pone a disposición de los lectores un análisis hermenéutico profundo de la producción investigativa generada en Chihuahua durante la década 2008-2018, en diversas áreas temáticas, que los grupos de investigadores han ido desarrollando y consolidando en los últimos veinte años.
Optimization of polymerase chain reaction for monitoring of Borrelia burgdorferi infection by ixodid ticks
Authors: Panteleienko O. , Tsarenko T.
Published: June 2023

Determination of the infection rate of ixodid ticks with tick-borne borreliosis pathogens and determination of belonging to the pathogenic genotype by PCR is an important component for monitoring, risk assessment and control of the epizootic situation of Lyme borreliosis in different territories. The results of testing and optimization of the internal laboratory protocol of the classical polymerase chain reaction for the identification of Lyme disease pathogens are presented. Eight samples of extracted DNA from ixodid ticks collected from vegetation in the forest park tract "Golendernya", Bila Tserkva, Kyiv region, were examined by classical PCR. Samples were formed from pools of ten tick specimens: seven pools - ticks of the genus I. ricinus and one pool - ticks of the genus D. reticulatus. For detection of borrelia DNA, primer sets were used to detect DNA of Borrelia burgdorferi sensu lato complex; Borrelia burgdorferi and pathogenic borrelia: Borrelia burgdorferi sensu stricto, Borrelia garinii and Borrelia afzelii. The protocol for nucleic acid extraction from ticks was modified using the commercial IndiSpin Pathogen Kit. Optimization of amplification temperature conditions was carried out by the annealing temperature gradient method for each primer pair. Based on the results of the study, internal laboratory protocols for classical PCR using specific oligonucleotide primers were developed. It was found that in each of the pools of I. ricinus and D. reticulatus there were infected tick specimens with the Borrelia burgdorferi sensu lato complex and Borrelia afzelii genus, and also identified the Borrelia burgdorferi sensu stricto genus in one of the pools of I. ricinus and D. reticulatus, DNA of the Borrelia garinii genus was not detected. The developed internal laboratory protocols of classical PCR will be further used to study the infection of ixodid ticks with tick-borne borreliosis pathogens: Borrelia burgdorferi sensu lato, Borrelia burgdorferi sensu stricto and Borrelia afzelii.
Key words: Lyme borreliosis, Ixodes ticks, polymerase chain reaction, Borrelia burgdorferi sensu lato, Borrelia burgdorferi sensu stricto, Borrelia afzelii, Borrelia garinii.
Diagnosis and differential diagnosis of viral hemorrhagic disease and eimeriosis of rabbits
Authors: Tsarenko T. , Papchenko I. , Antipov A. , Mazannyi O. , Korniienko L.
Published: June 2023

The rabbit breeding industry in Ukraine is an important element of animal husbandry, most of the rabbits are in private households. In the absence of systematic veterinary care, accurate postmortem diagnosis of the causes of death of rabbits in households is important. Rabbit eimeriosis is widespread in Ukraine and with mixed intestinal and hepatic forms of eimeriosis against the background of unsatisfactory feeding and maintenance in young rabbits can cause death. Viral hemorrhagic disease of rabbits is also common in Ukraine and causes the death of rabbits of all ages. The aim was to study the pathomorphological changes in eimeria and viral hemorrhagic disease of rabbits and the use of other methods to confirm the diagnosis. The article presents the results of pathological, coprological and microbiological diagnosis of rabbit eimeriosis. Polymerase chain reaction was used to confirm the diagnosis of viral hemorrhagic disease of rabbits with the simultaneous establishment of the genotype of the pathogen. The effectiveness of the use of additional methods of postmortem diagnosis of eimeria (coprological, microscopic) and viral hemorrhagic disease of rabbits (polymerase chain reaction) was established. In rabbits that died from rabbit hemorrhagic disease the infection was caused by the virus of the first type.
Key words: pathological and anatomical diagnosis, coproscopy, PCR, liver damage.
Сows behavior under different physiological states and keeping methods
Authors: Emelyanenko A. , Shmayun S. , Nischemenko M. , Poroshinska О. , Stovbetska L. , Koziy V.
Published: June 2023

Taking into account the peculiarities of the behavior of cows, in particular in the conditions of modern intensive animal husbandry, is an important factor in ensuring the health of the herd and obtaining high-quality livestock products. Behavioral indicators can be effectively used to monitor animal feeding and housing conditions. The aim of the work was to get acquainted with the stereotype of behavior of cows in industrial conditions under different physiological conditions and methods of keeping. For this, a search, selection and analysis of publications was carried out according to the topic of the study. Web of Science Core Collection and PubMed scientometric databases were used to search for scientific articles. It has been established that in the conditions of modern dairy farms, cows should be in a lying position for about half of the daily time. The soft and dry surface of the couches, their sufficient spatial parameters, ensuring adequate conditions of the external environment (temperature, humidity, wind speed, lighting, etc.) The quality of rest also depends on the social environment, physiological state, individual characteristics of cows, etc. Providing free access to walking areas and pastures contributes to a more complete expression of the natural behavior of dairy cows. Cows prefer to stay outside the premises mainly at night. Open pastures are more attractive to cows than walking areas with sand or straw. Foraging behavior is an important factor in ensuring cow health and high milk productivity. It is determined by the parameters of cows' access to fodder and the fodder table, the quality, quantity and feeding algorithm of fodder mass. Feeding of cows should be organized in such a way as to ensure constant free access of animals to the feed table, constant satisfactory, without physical obstacles, availability of quality feed on the feed table. Maternal behavior of cows is an important indicator that allows you to assess the condition and conditions of keeping cows before, during and after calving. Therefore, changes in the behavior of cows can have important diagnostic and prognostic value. Conducting further research in this direction is an urgent task of veterinary science and practice.
Key words: stereotypeof behavior, cows, methods of maintenance, calves, exercise, diet, dairy farms.
Analysis of Locutionary Speech Acts in the Comment Column of Olshop Accounts on Instagram
Authors: Windy  , Yusni Khairul Amri  , Dian Marisha Putri
Published: June 2023

Instagram has expanded into a business area which is a way to promote and sell products or goods to other Instagram users which is commonly called an online shop. This analysis aims to describe the locutionary speech acts contained in the comments column of the olshop account on Instagram. The data sources in this analysis are several olshop accounts on Instagram. In this analysis, data were analyzed using locutionary speech acts, namely speech acts that state something. According to Chaer and Agustina, locutionary speech acts are divided into three, namely locutionary speech acts in the form of questions, locutionary speech acts in the form of statements, and locutionary speech acts in the form of orders. From the results of the analysis of the twenty data collected, there were 13 data included in the three locutionary speech acts, namely 9 data including locutionary speech acts in the form of questions, 2 data including locutionary speech acts in the form of statements, and 2 data which includes locutionary speech acts in the form of commands.
The justification for using mobile crushing and screening plants in quarrying industrial minerals
Authors: Sobko B , Hrytsenko L , Kriachek V
Published: June 2023

Purpose. Industrial minerals mining technology justification using mobile crushing and screening plants. Methodology. Analytical, statistical, graph analytical methods and experimental research were used on working quarries. Findings. The research made it possible to establish the influence of the migmatites mining technology by mobile equipment on the capacity of the extraction-loading and transport equipment. The following conclusions can be made based on the studies of the complex influence of the factors of the industrial minerals mining technology by mobile equipment on the example of the Odarivsky deposit of migmatites. Using mobile crushing and screening equipment located in the quarry allows for increasing Excavator Productivity for loading crushers' hopper at 16.7% compared to the loading in haulers and increases the productivity of haulers at an average of 25% compared to the cyclic technology in which the crushing and screening equipment is located on the surface, and haulers carry out the transportation of raw material from the quarry. The increase in the productivity of mining transport equipment is achieved due to the absence of downtime of the excavator while waiting for haulers and the maximum use of the vehicle's load when transporting finished crushed stone products with a high bulk density. Originality consists in establishing the peculiarities of industrial minerals mining and establishing the dependences of changes in the productivity of mining transport equipment when using mobile crushing and screening equipment directly on the working sites of the quarry. Practical value. The results of the research made it possible to justify the complex mechanization of the cyclic technology of raw material extraction with the use of mobile crushing and screening equipment for the application in Odarivsk migmatite deposit, which increases the efficiency of the use of extraction and loading equipment and haulers, which ultimately reduces the need for transport equipment and improves the efficiency of the mining as a whole during the industrial minerals mining for the production of aggregates.
Mathematical simulation of rock mass destruction zones by explosion
Authors: Kononenko M , Khomenko O , Sadovenko I , Sobolev V
Published: June 2023

Purpose. Improving the parameters of the rock mass destruction zones by a blasting, depending on the pressure of the explosion products in the charging cavity and the physical and mechanical properties of rocks by combining analytical and numerical mathematical simulation. The methodology of research. Using the theory of elasticity and the main provisions of the quasi-static wave hypothesis of the mechanism of destruction of a solid medium under the action of an explosion, an analytical simulation of the parameters of the formation of crush zones and grinding of a rock mass around the charging cavity under its explosive load was carried out. After the change in the stress-strain state of the massif under the action of the explosion, numerical simulation of the crushing zones, intensive grinding and cracking by the finite element method was carried out. To establish the suitability of the obtained analytical models for calculating the radii of the indicated zones, the results of analytical and numerical simulation were compared. Findings. Analytical models have been developed for the radii of the zones of crushing, intense grinding and cracking, which are formed around the charging cavity in the rock mass under its explosive load, taking into account the pressure of the explosion products, the tensile-compressive strength of the rocks, their structural structure, and fracturing. Numerical simulation of the destruction of rocks around the charging cavity established the power-law dependences of the change in the radii of the crushing zones and the grinding of the massif depending on the diameter of the charging cavity, the pressure of the explosion products, and the compressive strength of the rocks. By comparing the results of analytical and numerical simulation for rigid boundary conditions of a homogeneous non-fractured massif, the discrepancy between the radii of the indicated zones is found to be 4, 8 and 6%, respectively. The originality. The radii of the zones of crushing, intense grinding and cracking, established by mathematicalsimulation, formed during the explosive destruction of the rock mass, change according to a power law dependence on the diameter of the explosive charge, the pressure of the explosion products in the charging cavity, the strength of the rocks in tension-compression, the coefficients of the rock structure, structural weakening and compaction, determine the increase in the accuracy of estimating the parameters of the destruction of the rock mass up to 50%. Practical implications. Based on mathematical models of the radii of the zones of crushing, intense grinding and cracking, which are formed in the rock mass around the charging cavity under the action of an explosion, improved parameters of drilling and blasting operations are determined for mine workings, special-purpose cavities and breaking of the massif.
Types, varieties and evaluation criteria qualities of pearls
Authors: Baranov P , Slyvna O , Shevchenko S
Published: June 2023

Purpose. To carry out a comprehensive analysis of the existing types and varieties of pearls on the world market of precious stones and to establish indicators of pearl quality assessment, which the expert service needs. The methods. The work uses general scientific and special research methods - theoretical (analysis, generalization, comparison), gemological and economic. The main part of the work is based on the analysis of literary sources, information from the Internet and practical results of previously performed research and expert evaluations. The objectivity of the methodology is ensured by a large amount of analytical work carried out on specific batches of pearls, as well as by a close natural relationship between types, species and methods of growing pearls. Findings. It is shown that pearls are precious stones of organogenic formation, which by genesis can be of natural origin, cultivated and synthetic. The credibility and reliability of the conducted research is ensured by the convergence of the results between the quality assessment criteria and the methods of growing pearls, as well as the complex of decorative properties that are established for each genetic variety. The proposed criteria for assessing the quality of pearls are aimed at obtaining objective results and, importantly, they ensure the invulnerability of the expert in his professional activity during the gemological examination. The originality. The main criteria for the quality of pearls have been established. Various variations of certain of its properties, characteristic of each specific genetic variety, became the basis for assessing the quality of pearls based on the natural relationship between methods of cultivation in different conditions (sea, river basins) and decorative properties. In the future, the proposed criteria for assessing the quality of pearls will allow to expand and improve the scientific and methodological base of the Expert Service of the Ministry of Internal Affairs of Ukraine and other related organizations. Practical implementation. The use of the proposed criteria for assessing the quality of pearls will allow specialists to determine the variety, geography of cultivation (method and place of cultivation), quality group and cost, which is determined by procedural and legal acts in the field of forensic examination.
Assessment of the effect of topological optimization of metal parts
Authors: Matsiuk I , Koptovets O , Shliakhov E , Diachkov P
Published: June 2023

Purpose. The purpose of this article is to evaluate the efficiency of using the “Shape optimization” option in the Fusion 360 software product of the American company Autodesk for the details of the braking system of a mining electric locomotive. Methodology. With the advent of modern computer programs, the content of the design engineer’s work has changed, the design process has been reduced to the development of a 3D model of a metal product, which can then be subject to stress-strain analysis and, based on the results of this analysis, low-stress areas of the product which can be removed are be determined, that is, the weight of the metal used is reduced. Of particular importance is generative design, which is a new design technology. It is based on the use of software that can independently generate three-dimensional models that meet specified conditions without the involvement of a designer. Essentially, in the “human-machine” system, creative functions are passed to the computer, which deals well with them. The second most important technology is topological optimization (Shape optimization), which is applied to a model already developed by the designer in order to improve it. Findings. The paper presents the results of the research on reducing the weight of the parts of the braking system of the mine electric locomotive due to the topological optimization of their structures in the Fusion 360 software product. The removal of unloaded areas of the product was performed using the special option “Shape optimization” of this program.The effect of weight reduction in products after topological optimization is estimated to be approximately 35-45%. Originality. The use of topological optimization in the details of the braking system of the mining electric locomotive is a new approach to optimizing the structure and obtaining parts of reduced mass. Practicalvalue. The application of topological optimization at the design stage helps to find a construction design option with the most rational distribution of material and voids in a given area taking into account strength and stiffness, and, thus, significantly reduce its weight.
Using applied program packages in determining optimum cutting modes
Authors: Bohdanov O , Grigorenko V
Published: June 2023

Purpose. Comparison of the functionality of application program packages when determining optimal cutting modes during mechanical processing. Creation of a mathematical model with technological limitations when boring a shaft in one pass and carrying out calculations. The methods. Research methods were based on the principles of optimization of cutting processes, the theory of cutting and cutting tools, standard methods of determining correction factors were used when creating technological limitations. The smallest machine processing time is chosen as the objective function. Using the functionality of the mathematical package Mathcad and the "Turning optimization" program. Findings. The created mathematical model of turning optimization sufficiently fully describes the machining process. The difference between calculations by two methods is no more than 10%. The functionality of the application programs is enough to determine the optimal parameters of the cutting modes - the number of revolutions of the machine spindle and feed. In addition, when using the Mathcad package, it is possible to add or remove technological constraints. Without a suitable database of correction factors, the search and calculation process is complicated. On the other hand, the "Turning optimization" program works in automatic mode, you only need to enter the initial data. But it is impossible to change the technological limitations, the insufficient number of standard materials of cutting tools and parts. The originality. A mathematical model of optimization of cutting modes when boring a shaft to a pass with corresponding technological limitations was created and investigated. A comparison of application program packages was carried out when determining the optimal cutting modes. Advantages and disadvantages of application programs are defined. Practical implementation. The proposed mathematical model of optimization of cutting modes during turning allows to determine the optimal parameters of the number of revolutions and feed of the machine. Its use will greatly facilitate calculations carried out by designer-technologists when designing technological routes for processing parts and calculating cutting modes. This will significantly reduce production preparation time, especially when using CNC machines.
Research of temperature phenomena during the mechanical processing of steels and iron
Authors: Derbaba V , Bohdanov O , Ruban V
Published: June 2023

Purpose. Research of temperature phenomena in the cutting zone of steel and cast iron blanks in the conditions of industrial production by methods of computer modeling of non-stationary processes of heat exchange during mechanical processing and the search for the optimal material for a cutting tool. The methods. Research methods were based on the basics of the theory of cutting and cutting tools, the theory of heat conduction in relation to the contact surfaces of the cutting tool and the workpiece in the cutting zone. Use of an application program for modeling thermal phenomena during mechanical processing of metals and alloys. Determination of optimal cutting modes taking into account temperature changes. Findings. A computer experiment confirmed that the optimal cutter materials when processing 30X steel is a tool made of P6M5 material, and it is better to use a tool made of VK8 material for processing ChCh20 cast iron. With the same cutting parameters (cutting depth, feed, cutting speed, tool geometry), the contact surfaces heat up less, and therefore the tool will lose its cutting qualities more slowly and will last longer, with the proper quality of the final product. If there is a lack of cutters made of optimal materials in the conditions of limited capabilities of the enterprise, it is possible to use a non-optimal tool material for mechanical processing of steels and cast irons with small cutting depths of up to 1 mm and at low feed - 0.2 mm/rev. At greater depths of cutting and feeding (t > 1 mm, S > 0.2 mm/rev), temperatures in the cutting zone rise rapidly, increasing by 20-40ºС, which negatively affects the processing process and reduces the stability of the cutting tool. The originality. Optimum modes of cutting and brands of materials of parts and workpieces, which will ensure high quality of processing, have been established. Research of thermal processes of the tool-workpiece system with determination of the temperature at any point on the contact surfaces. Practical implementation. Using the application program allows you to determine the temperature of the appropriate point of the cutting wedge, simulate the distribution of the thermal field for different cutting modes (cutting depth, feed, cutting speed, tool geometry) and set their optimal values, taking into account the material of the cutter and the workpiece. This will significantly speed up the preparation of the technological process of mechanical processing, ensure the required quality and minimize costs.
Optimization of product processing modes in modeling and programming of machining on machine tools with program control
Authors: Ruban V , Derbaba V , Bohdanov O , Shcherbyna Ye
Published: June 2023

Purpose. To solve a scientific and technical problem related to the technological support of high-performance machining of a cast iron part by optimizing and controlling its machinability with a hard-alloy tool on multi-axis CNC machines using CAD-CAM systems. The methods. The methodological basis of the work is a systematic approach and analysis of the study of the object of research, based on the use of: numerical and graphical-analytical research methods in order to establish a systematic relationship between turning parameters and the properties of the material being processed, tool geometry and its stability, parameters of cutting modes with the corresponding indication in the control program for the CNC machine. Findings. Numerical research results have been obtained for a scientifically based approach to solving the technical problem of high-performance turning of cast iron parts on multi-axis machining centers, which contains a set of adjusted methods and algorithms for predicting their machinability with ensuring the reliability of hard alloy cutting tools. The results obtained were compared with known works related to the study of machining processes of various grades of steels, alloys, and cast irons, the assessment of the reliability of cutting tools, the accuracy and roughness of the machined surface, and the results of measurements of cutting force parameters. The maximum relative error of the calculations did not exceed 6-8%. The originality. Establishment of a complete and systematic connection of machining parameters with the properties of the processed material, tool geometry and design and technological factors of the part for the calculation of an optimized automated production technology. In the mathematical and statistical processing of experimental data, which made it possible for the first time to obtain complex dependencies in a form convenient for calculation and analysis, which give a clear picture of the effect of each parameter of the turning process on its energy and time indicators when compiling a rational technology for machining a part of complex geometric shape in a CAM system. Practical implementation. It consists in selecting and justifying the optimal geometric parameters of cutting tools and equipment, establishing the nature of the influence of the conditions of turning cast iron on the main process parameters - machining time and operating parameters depending on the hardness of the part material and tool material. Practical recommendations are given on the optimal use of CAD-CAM systems, adjustment of process results and operating parameters to obtain optimal results at the stage of production preparation.
Prevalence of Neisseria gonorrhoeae, Chlamydia trachomatis, Mycoplasma genitalium, and Trichomonas vaginalis among patients suspected of sexually transmitted infections in Evercare Hospital Dhaka during 2015 to 2022
Authors: Hasan Nazmul , Rahim Rummana , Hasan Abu , Ali Rubaiya , Ullah QM Mahbub , Rahman Mizanur
Published: June 2023

Background Sexually Transmitted Infections (STIs) are often diagnosed by clinical symptoms and signs due to lack of sensitive laboratory methods. Most of the time pathogens are not identified and antibiotics are used empirically. The purpose of our study is to find out the STI pathogens detected by sensitive multiplex PCR done routinely in a tertiary care hospital.

Materials and methods A total of 578 samples were tested from February 2015 to July 2022. Urine, prostatic secretion, urethral swab, high vaginal swab, semen, throat swabs were collected from symptomatic patients for the routine test. DNA was extracted and Neisseria gonorrhoeae, Chlamydia trachomatis, Mycoplasma genitalium, Trichomonas vaginalis were screened by using CE-IVD approved multiplex Real Time PCR kit.

Result Out of 578 cases, 76 (13.15%) were positive for at least one pathogen and 5 were co-infections. Out of 76 positive cases, Chlamydia trachomatis was found 41 (53.9%), Neisseria gonorrhoeae was 13 (17.1%), Mycoplasma genitalium was 12 (15.8%), and Trichomonas vaginalis 5 (6.6%) and co-infections with Neisseria gonorrhoeae and Chlamydia trachomatis was 5 (6.6%). Positivity rate was remarkably higher in male (77.6%) than female (22.4%) and predominant age group was 19-40 years.

Conclusion The predominant STIs pathogen found in our cohort is Chlamydia trachomatis followed by Neisseria gonorrhoeae. Multiplex PCR is a wide-ranging diagnostic method for the detection of multiple pathogens simultaneously which allows early and accurate diagnosis of STIs.

Pulse Volume 12-14 2020-2022 p.34-39
Tác động của mức độ mở cửa thị trường đến xác suất xảy ra khủng hoảng tài chính
Authors: Nguyễn Thành Công , Trần Thúy Quỳnh
Published: June 2023

Bài nghiên cứu sử dụng dữ liệu từ 61 quốc gia trong giai đoạn 1996–2019 để phân tích tác động của mức độ mở cửa thị trường đến xác suất xảy ra khủng hoảng tài chính. Chúng tôi phát hiện ra rằng mức độ mở cửa thị trường cao hơn làm tăng khả năng xảy ra khủng hoảng tài chính, đặc biệt là khủng hoảng ngân hàng. Khi phân tích ba khía cạnh quan trọng của mở cửa thị trường, chúng tôi cho thấy việc thúc đẩy tự do thương mại làm giảm khả năng xảy ra khủng hoảng tài chính, trong khi đó nâng cao mức độ tự do đầu tư và tự do tài chính lại làm tăng xác suất khủng hoảng tài chính. Tuy vậy, tác động tích của của tự do thương mại bé hơn rất nhiều so với tác động tiêu cực của tự do đầu tư và đặc biệt là tự do tài chính.
İnsana Yakışır İşin Öznel İyi Oluş ve İşten Ayrılma Niyetine Etkisi
Authors: ZENGİN Yunus , BAYRAM Nagihan
Published: June 2023

Bu çalışma, insana yakışır işin öznel iyi oluş ve işten ayrılma niyeti üzerine olası etkilerini incelemeyi amaçlamaktadır. Rekabetin yoğun olarak yaşandığı günümüz ekonomisinde işletmelerin sürdürülebilir rekabet üstünlüğünü sağlayabilmesi üretimde en değerli faktör olan emeğe sağlayacağı koşullara bağlıdır. Bu gerçek karşısında işletme yöneticileri, çalışanların çalışma koşullarının iyileştirilmesine yönelik çalışmalar başlatarak, çalışanların daha iyi koşullarda çalışmalarına olanak sağlayacak ortamlar oluşturma gayretine girmişlerdir. Bu düşünceler ile ulaşılmak istenilen temel amaç bir yandan işletmeye rekabet avantajı sağlamak olurken diğer taraftan çalışanların memnuniyet düzeylerini yükseltmek hedeflenmektedir. Çünkü memnuniyet düzeyi yüksek olan çalışanların kurumlarına karşı olan sinik ve işten ayrılma düşünceleri azalacaktır. Mevcut düşünceyi test etmek amacıyla ele alınan bu çalışmada kullanılan veriler Antalya ilinde faaliyette bulunan medikal şirketlerinde çalışan 152 kişi üzerinde yapılan anket tekniği ile elde edilmiş ve SPSS programı kullanılarak analiz edilmiştir. Yapılan araştırma sonucunda, insana yakışır işin öznel iyi oluş ve işten ayrılma niyetini pozitif yönde ve anlamlı bir şekilde etkilediği tespit edilmiştir.
Kültürel Kimlik ve Tüketici Etnosentrizminin Müşteri Tatmini, Müşteri Katılımı ve Tekrar Satın Alma Niyeti Üzerindeki Etkisinin Cinsiyet Bağlamında İncelenmesi
Authors: USAL Yusuf , BOZYİĞİT Sezen
Published: June 2023

Bazı tüketiciler kültürel kimlik ve etnosentrizm gibi nedenlerden dolayı küresel markalara karşı olumsuz tutum sergilemektedir. Bu olumsuz tutumlar müşteri katılımına ya da müşteri tatminine etki etmektedir. Markadan tatmin sağlamayan tüketicilerin o markayı tekrar satın alma olasılıkları azalmaktadır. Hem küresel markalara karşı tutum hem de müşteri tatmini ve tekrar satın alma niyetinde cinsiyetin de önemli bir faktör olduğu bilinmektedir. Bu nedenle araştırmanın amacı tüketicilerin yerel ve küresel kahve markalarına yönelik tercihlerinde kültürel kimlik ve etnosentrizmin müşteri katılımı, müşteri tatmini ve tekrar satın alma niyeti üzerindeki etkisini cinsiyet bağlamında incelemektir. Araştırmanın örneklemini Türkiye’de yaşayan kahve zinciri mağazalarına giderek kahve tüketimi yapan 18 yaş ve üzeri 388 tüketici oluşturmaktadır. Araştırmada veriler online anket yöntemiyle toplanmış ve yapısal eşitlik modeli kullanılarak analiz edilmiştir. Araştırma sonuçlarına göre kadın tüketicilerde kültürel kimlik etnosentrizmi, etnosentrizm müşteri katılımını, kültürel kimlik ve müşteri katılımı müşteri tatminini, müşteri katılımı ve müşteri tatmini tekrar satın alma niyetini olumlu, etnosentrizm müşteri tatminini ise olumsuz olarak etkilemektedir. Erkek tüketicilerde ise kültürel kimlik etnosentrizmi, etnosentrizm müşteri katılımını, müşteri katılımı müşteri tatminini, müşteri katılımı ve müşteri tatmini ise tekrar satın alma niyetini olumlu olarak yordamaktadır.
THE TASK OF SEPARATING OF ITEMS OF CLOTHING AND FOOD SUPPLY IN THE ELEMENTS OF THE COMPLEX OF COMBAT EQUIPMENT OF A SERVICEMAN OF THE NATIONAL GUARD OF UKRAINE
Authors:   The National academy of hte National Guard of Ukraine, Alboschiy O. , Sukonko S. ,   The National academy of hte National Guard of Ukraine, Pavlenko S. ,   The National academy of hte National Guard of Ukraine
Published: June 2023

The development of the military sphere of activity is ongoing and comprehensive. One of the areas of such development is the equipment of military personnel. Nowadays, much attention is paid to combat equipment in the armies of all countries of the world. According to the Concept for the Creation of a Combat Equipment Complex for the Armed Forces of Ukraine, combat equipment is a set of items that constitute the equipment of a serviceman during combat missions. A combat equipment complex is generally understood to mean the combat equipment of servicemen created to increase the effectiveness of their personal actions in combat (hostilities), as well as as part of a unit in the squad, platoon, company, and battalion. A modern combat equipment complex includes a large number of elements that are interconnected, and their interaction generates properties that are not inherent in its individual elements. Each element of this kit has its own weight, dimensions, and operational features, which together create a load on the serviceman, forming the distribution of mechanical forces and moments on the human body. Consequently, there is a contradiction between the growing capabilities provided by each element of the combat equipment complex for a soldier in combat and the limited physical capabilities of the soldier as a carrier of the equipment and its user. One of the ways to resolve this contradiction is to divide the elements of the combat equipment complex into echelons. Taking into account the differences in the content of tasks, duration of actions and conditions of their performance, it is important to create preconditions for achieving high efficiency of servicemen in the performance of each type of task. An important role in creating such prerequisites is played by the distribution of a set of items provided for by the supply standards by echelons. A rational distribution will allow a serviceman to carry those items that are necessary for life support during the performance of specific tasks, without overloading him with unnecessary (surplus) property. The task of echeloning the combat equipment complex of a serviceman of the NGU by elements of material and food supply can be formulated using a theoretical-multiple approach. In order to find effective solutions for the echeloning of items of clothing and food supply, it is necessary to identify and study the factors that affect the needs of a serviceman in combat equipment items for specific special (combat) tasks, to introduce appropriate indicators, selection criteria and quantitative restrictions imposed on the values of the echelons' parameters.
METHODS OF ENSURING THE DEFINED LEVEL OF COMBAT SURVIVAL OF ARMORED WHEELED VEHICLES
Authors:   The National academy of hte National Guard of Ukraine, Kaidalov R. , Bilenko O. ,   The National academy of hte National Guard of Ukraine, Kudimov S. Kudimov ,   The National academy of hte National Guard of Ukraine
Published: June 2023

The experience of military conflicts of the last decades has shown the constantly growing role of armored wheeled vehicles (AWVs). In recent years, a significant number of AWVs of various purposes have been developed and adopted by the security forces of Ukraine: armored personnel carriers; carriers of anti-tank weapons, anti-aircraft weapons, mortars; machines of radio-electronic intelligence and radio-electronic warfare; medical evacuation vehicles, etc. AWVs that deliver personnel to the battlefield, provide their fire support, or are equipped with powerful weapons and other combat equipment are being the priority targets for the enemy. AWVs damages significantly reduce the probability (or completely makes it impossible) to perform a specific combat task, therefore there is an objective need to ensure a certain minimum level of survivability of an armored wheeled vehicle in order to preserve its combat capability and ensure the performance of the intended tasks. Therefore, the purpose of the article is to create a methodology for ensuring a given level of combat survivability of armored wheeled vehicles. A technique for ensuring a given level of combat survivability of AWVs has been developed. It allows to obtain combat survivability indicators that correspond to a given level of combat survivability by the consistent improvement of the vehicle operational characteristics. The methodology can be used to form the requirements for the technical characteristics of armored wheeled vehicles at the stage of their development and modernization, as well as to assess the compliance of the existing AWVs with the requirements for combat survivability. The direction of further research is to study the impact of other armored wheeled vehicles properties on combat survivability.