bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development and justification of the system methodological approach to assessing the investment business project implementation efficiency under conditions of the external market environment factors impact
Authors: Kabachenko Dmytro , Lapkhanov Erik 
Published: July 2023

Evaluating the effectiveness of the implementation of an investment project is a key issue when making management decisions both at the stage of setting up a startup and for expanding an existing business.
This paper reports a systematic approach to building a mathematical model to solve the task of forecasting the effectiveness of business projects, taking into account the influence of factors of the external economic environment. Proposed factors include the impact of supply and demand on the price of goods, political and industry risks, the volume of commodity supply and sales. In view of this, a method for calculating the political component of the discount coefficient using the Fourier series has been proposed. Using the theory of differential equations, correlation and regression analysis, a mathematical model for forecasting indicators of efficiency of business project implementation taking into account the influence of factors of the external economic environment has been constructed. Based on it, a generalized algorithm for applying a mathematical model to predict the effectiveness of investment projects in various business sectors has been developed.
The results from applying differential equations and variable discount coefficient showed a decrease in NPV by 14 %, and PI by 5.1 %, due to more accurate consideration of the political component in calculating the discount factor. Also, with the influence of supply and demand on the price of goods and nonlinear cash flows, it was found that the payback period does not clearly indicate the effectiveness of the implementation of an investment business project. Determining these factors provides more accurate information to the investor or business owner when forecasting the stability of a business project for making management decisions on its implementation
Development of a virtual hardware temperature observer for frequency-controlled asynchronous electric motors
Authors: Nurmaganbetova Gulim , Issenov Sultanbek , Kaverin Vladimir , Issenov Zhanat 
Published: July 2023

One of the most common types of AC electric machines are asynchronous electric motors. Because of their simple and reliable design, they are used in many industries. In this paper, the object of research is an asynchronous electric motor with a short-circuited rotor. To ensure the normal operation of an asynchronous electric motor, the heating temperature of its active parts should not exceed the maximum permissible values, which are determined by the corresponding class of heat resistance of the insulation system used in the electric motor. In asynchronous electric motors, the stator winding is the most thermally vulnerable node, which is the first to fail when the temperature of the electric motor increases. Thermal protection devices protect an asynchronous electric motor from emergency operating modes accompanied by an unacceptable excess of the temperature of their windings.
In order to build an indirect system of protection against overheating of the stator windings, a temperature observer has been developed using already available signals in a frequency-controlled electric drive. Simulation studies were performed in Matlab/Simulink application software packages. Simulation studies were carried out on the basis of asynchronous electric motors of the 4A series with a capacity of 30, 75 and 110 kW in the temperature range from 20 °C to 250 °C. As a result of the research, it was found that the error of indirect calculation of the temperature of electric motors, taking into account the correction factor, does not exceed 1 %. The proposed temperature observer can be used to build protections for asynchronous electric drives
Justification of the method for determining the reliability of the operator of a mobile fire fighting installation
Authors: Abramov Yuriy , Basmanov Oleksii , Sobyna Vitaliy , Kohanenko Vladimir , Kolomiiets Valerii 
Published: July 2023

The object of research is the operator of a mobile fire installation; the subject of research is the operator’s characteristics, particularly his reliability. The method of determining the reliability of a mobile fire installation operator as a functional element of a dynamic system is substantiated. Operator failure is interpreted as the output of its frequency characteristics beyond permissible limits. Analytical dependences for variations of the operator’s frequency characteristics on variations of its parameters – transmission coefficient, delay time, and time constant are constructed. The amplitude and phase reliability of the operator of a mobile fire installation are determined using the Laplace functions, the arguments of which are the permissible values of variations in the frequency characteristics of the operator and variations of its parameters. Determination of variations of operator parameters is carried out by the instrumental method using the operator’s activity monitoring system. The test effect on the operator of a mobile fire installation is carried out in the form of a rectangular pulse that formalizes the change in the position of the combustion cell at a priori a given distance over a priori predetermined time. A signal characterizing the operator’s response to the test impact is determined using the Laplace integral transform. Measuring the parameters of this signal allows you to determine the variations in operator parameters that are used to determine its reliability. It is shown that for variations of operator parameters, the values of which are 10.0 % with RMS deviations of 3.3 %, with a probability of 0.8715 the amplitude-frequency and phase-frequency characteristics at the time of its control will not differ from their nominal values by more than 5.0 %. The requirements regarding the reliability of the operator’s activity control system are determined
Strengthening of friction surfaces by using geomodifiers based on serpentines from the Dashukivka deposit
Authors: Bodu Svіtlana , Andrieiev Vyacheslav , Novoshytskyi Anton 
Published: July 2023

The object of research is the process of improving the tribological characteristics of friction joints, in particular anti-wear and anti-burr properties.
There is a practice of using serpentines, so-called "friction geomodifiers" (FGM), as special repair and restoration additives. Their use leads to a decrease in the coefficient of friction and temperatures in the contact zone; an increase in the mass of parts is observed, which indicates the restoration of worn surfaces. The mechanism of formation of new structures is still unclear. There are hypotheses that severe friction conditions initiate micrometallurgical processes at the atomic-crystalline level, as a result of which modified layers with unique tribological characteristics are formed on the surfaces.
A comparative analysis of the main indicators of serpentines of the Dashukivka deposit in terms of chemical composition and structure showed their correspondence to widely known analogs but they were never used in such a capacity.
According to the results of the tests, the additives have shown their effectiveness as geomodifiers of friction. Addition of 4 % serpentine to the lubricating composition based on I-20 A oil reduced the wear rate by 2–3 times, the friction moment by 15 %, compared to I-20 A without additives.
An increase in surface microhardness was observed, from 6 GPa for the basic variant to 10 GPa, for the variant with FGM additives.
It has been established that the use is most effective for heavily loaded friction pairs (ship fittings, hatch closures, etc.) as it increases the clamping load (from 600 to 1400 N for a pair of steel 45/ShKh15); with increasing load, the coefficient of friction and the rate of wear decrease.
The results confirm the need to expand research into this area to solve the complex problem of increasing the reliability of tribojunctions.
Keywords: repair and restoration technologies, friction geomodifiers, serpentine, heavily loaded friction pairs
Study of factors affecting the in vitro release of dexpanthenol from solutions and topical semi-solid preparations
Authors: Bezuglaya Elena , Liapunova Anna , Zinchenko Igor , Lyapunov Nikolay 
Published: July 2023

The aim. To identify the factors influencing the in vitro release of dexpanthenol (DP) from solutions and semi-solid preparations.
Materials and methods. Dispersed systems containing 5.0 % DP were studied: solutions that were Newtonian liquids and semi-solid preparations (creams, gels and ointment) with non-Newtonian flow behaviour. Rheological studies were performed by rotational viscometry. In vitro release tests were performed using vertical diffusion cells. The content of DP in the receptor medium was determined by liquid chromatography.
Results. It has been shown that the greatest values of release parameters of DP were characteristic of its aqueous solution; they decreased when propylene glycol (PG), macrogol 400 (M400), and poloxamer 338 (P338) were added but remained at a high enough level. The inclusion of cationic surfactant and cetostearyl alcohol (CSA) (0.5 : 4.5 % m/m) into the Newtonian liquid led to the formation of disperse system with a plastic flow behaviour and to significant decrease in the DP release. In the case of a cream containing a non-ionic surfactant and CSA, the release parameters of DP were also at a low level. The release of DP from the w/o emulsion-based ointment was minimal. Compared to DP aqueous solution, the rate of DP release from a carbomer-based gel decreased by 2.8 times; when 20 % of a mixture of PG and M400 (10 : 10 % m/m) was added to such a gel, the rate of drug release decreased by another 1.5 times. The fastest and most complete release of DP was observed in the case of the P338-based disperse system, which transformed from a Newtonian liquid into a gel at 32 °C.
Conclusions. In vitro release of DP depended on the type of base; rapid and complete release of DP was characteristic of its aqueous solution, and minimal release was observed in the case of hydrophobic ointment. The use of CSA in combination with a surfactant or carbomer to create bases for semi-solid preparations with plastic flow behaviour was a considerable factor that significantly slowed down the release of DP from them. The greatest values of the release parameters of DP were observed in the case of a gel based on P338
Emergency medical and legal assistance for victims of war-time rape
Authors: Vaida Taras 
Published: July 2023

The relevance of the problem of crimes against sexual freedom (rapes), committed by the military men of the aggressor country in the temporarily occupied territories of Ukraine, is determined as a direct violation of domestic legislation and international norms of humanitarian law.
The essence of the crime against sexual freedom and human inviolability as a socio-legal problem and a personal tragedy in the conditions of war is revealed. Attention is paid to the provision of psychological and pre-medical assistance to victims of sexual violence. The organizational and legal response measures of law enforcement agencies and other social institutions of the state to rapes, committed by the occupiers, are revealed, the procedure for investigation and documentation by a special mobile police group of facts of sexual violence by the occupiers is characterised. Recommendations for overcoming agraphobia are given.
In order to provide effective emergency medical and legal assistance to victims of rape in wartime, prevention of agraphobia, it is advisable to take into account a set of conditions: 1) in order to minimize the victim's destructive experiences of rape, it is advisable to use the technique of self-meditation and dissociation, to promote conviction about the guilt of the rapist-occupier; 2) pay attention to medical self-help, taking into account the existing contraindications to the use of available medical products, if possible, contact a gynecologist for a medical examination (avoidance of unwanted pregnancy); 3) provide operational information to law enforcement agencies about the facts of committed crimes, the location of victims, etc., to increase the efficiency of the investigation; 4) to conduct active monitoring of the specified problem by police units in the liberated territories; 5) to carry out mandatory documentation of the fact of the crime in accordance with legal requirements; 6) to take into account certain limitations in the attitude/communication with the injured person in order to avoid further psychological injury
The influence of project management on the performance of projects to implement procedural improvements: A multiple case study.
Authors: Santos Manoela Pastor dos , Carvalho Marly Monteiro , Do Amaral Caio Senna , Berssaneti Fernando Tobal 
Published: July 2023

Purpose – Project management is well established in the literature as a useful methodology for planning, organizing, monitoring projects in order to ensure its completion. Improvement projects are internal initiatives within an organization that can originate from different sources, especially from the search for continued improvement. Theoretical framework – Within this context, the research will seek to understand what are the benefits and influences of Project Management when applied to these types of projects, using as a research method a multiple case study in two companies, in units in Brazil and the United States, in which interviews were conducted with professionals directly involved improvement projects within the organization. Design/methodology/approach – The data from the recorded interviews were transcribed, organized, grouped, compared and analyzed and the discussions and results are presented in the present study. Findings – Relevant findings are that Project Management, at first, provides companies with guidance on how to plan their improvement projects to better execute them, but none of the evaluated companies showed homogeneous adoption.Research, Practical & Social implications - Some of the limitations found in the present study are that only two companies of specific branches were evaluated.Originality/value – This article will seek to investigate what is the influence of the application of the project management methodology on the performance of procedural improvement projects, from its definition, to its planning, execution and observation of the results arising from the practice.Keywords - Project Management, Performance, Results, Processes and Improvement Projects.
Penerapan Metode Motion Graphic Pada Video Animasi Prosedur Kerja Praktek Study kasus (Teknik Informatika UAD)
Authors: Fadli Muhamad , Sugiantoro Bambang , Arfiani Ika 
Published: July 2023

Kerja Praktek merupakan matakuliah wajib yang harus diselesaikan oleh mahasiswa. Pada pelaksanaan kerja praktek, banyak mahasiswa yang tidak mengerti prosedur pada mata kuliah ini karena sumber informasi yang selama ini digunakan, hanya penjelasan secara langsung dikelas dan pada saat bimbingan. Hal ini dapat menghambat praktik mahasiswa untuk menyelesaikan mata kuliah tepat waktu. penelitian ini, melakukan pembuatan video animasi Motion Graphic mengenai prosedur mata kuliah praktek, untuk mempermudah mahasiswa memahami prosedur pada praktek mata kuliah. Penelitian ini menggunakan rancangan dari pemodelan air terjun(waterfall). Pemodelan air terjun merupakan metode pendekatan desain sekuensial yang linier atau berurut untuk bidang-bidang teknik. Model air terjun ini melakukan kebutuhan sistem, rancangan sistem, implementasi, dan pengujian sistem hingga perawatan. Video animasi yang di rancang pada penelitian ini, dikembangkan menggunakan metode animasi Motion Graphic, yakni potongan-potongan rekaman digital yang di padukan dengan ilusi gerak dan gambar. Hasil penelitian ini berupa video animasi Motion Graphic, yang telah di uji menggunakan Blackbox Test dan System Usability Scale(SUS), dimana pada pengujian Blackbox Test memperoleh nilai 100% atau layak digunakan, serta pada pengujian System Usability Scale(SUS) memperoleh nilai sebesar 71 yang berarti Dapat diterima atau layak digunakan.
Review of the Monograph by Pyotr P. Serkov «Legal Relationship (Theory and Practice of Modern Legal Policy)» (Moscow: Norma Publ.; 2023)
Authors: Bezverkhov A. G. , Yudin A. V. 
Published: July 2023

The paper presents a review of the monograph written by a famous scientist and practitioner Pyotr Pavlovich Serkov titled «Legal relationship (Theory and practice of modern legal policy), a monograph in two parts. Part One is titled «Legal Doctrine and Legal Policies, Part Two is «Generalization of legal experiences of ascent to man, society and the state».The peer-reviewed scientific work prepared by Professor P. P. Serkov is a comprehensive theoretical and applied study of general and special issues of law, including the features of the emergence, change and termination of legal relations in various spheres of social life. The study aims to determine the effectiveness of legal regulators. In characterizing branch legal problems, the author applies encyclopedic approach alongside with deep theoretical generalization. The reader will find original judgments about constitutional, international, substantive, procedural and other types of legal relations in the two-volume book. The reviewers conclude that this fundamental work significantly contributes to the theory of law and the history of political and legal doctrines, and will also be very useful for the practice of law enforcement.
Difficulties of differential diagnosis of multisystem inflammatory syndrome associated with SARS-CoV-2 in a teenager (clinical case)
Authors: Konstantinova Yulia E. , Vilnits Alla A. , Chuprova Svetlana N. , Konev Aleksandr I. , Pshenichnaya Ksenia I. , Filippova Daria S. 
Published: July 2023

The new coronavirus infection does not lose its relevance, which is due to the ubiquity of the virus, the variety of strains, clinical manifestations and their consequences of COVID-19. In children, one of the severe complications of new coronavirus infection is the multisystem inflammatory syndrome associated with SARS-CoV-2 (MIS-C), which is characterized by a hyperinflammatory response with damage to two or more organs and systems. MIS-C requires differential diagnosis with other diseases with similar symptoms: bacterial infections, sepsis, toxic shock syndrome, Kawasaki syndrome, hemophagocytic syndrome. As an example, the article considers a clinical case of MIS-C in a 13-year-old girl 4 weeks after undergoing new coronavirus infection (confirmed). At the onset of the disease, the leading manifestations were systemic inflammatory response syndrome (fever, increased markers of inflammation) with damage to the cardiovascular system, skin and mucous membranes, lymphadenitis, thrombocytopenia. According to the severity of the condition, the child required observation and treatment in the intensive care unit. The absence of the expected effect of the recommended MIS-C therapy (intravenous immunoglobulin and pulse therapy with methylprednisolone) on the first day did not allow to exclude bacterial infection complicated by sepsis in the above clinical situation, therefore, it was suggested that the combined course of MIS-C and bacterial infection of unspecified etiology, which probably led to a more severe course of the disease. In the outcome of the MIS-C the child had the formation of a long-term depressive state (diagnosed by a psychiatrist), for which the patient received drug therapy and psychological assistance.
The described case showed difficulties in the formulation of the final diagnosis due to the presence in the patient of several symptoms and syndromes characteristic of various diseases, the absence of an identified etiological agent and the absence of the expected positive effect with standard therapy of the disease. In addition, a pathology was revealed in the catamnesis, which required dynamic observation of the child by several specialized specialists.
Increased mRNA grelin receptor expression in rat cubs brain structures in models of separation from mother and social isolation
Authors: Pyurveev Sarng S. , Lebedev Andrei A. , Sexte Edgar A. , Bychkov Eugenii R. , Dedanishvili Nikolay S. , Tagirov Nair S. , Shabanov Petr D. 
Published: July 2023

BACKGROUND: Stress exposure at an early age can have serious long-term consequences for the development of the human body, leading to adaptive disorders, increased anxiety, depression and other mental disorders in people. The effect of stressors in the first weeks after birth affects the proliferation, differentiation and migration of neurons, in particular, the neurogenesis of hippocampal cells. Repetitive stress can lead to changes in the structure and function of the brain, including deterioration of memory and skill acquisition, reduced resistance to stress in the future, decreased immune system function and increased risk of depression and other mental illnesses.
AIM: The aim was to study the effect of social isolation weaning on the level of ghrelin receptor mRNA expression in the brain structures of Wistar rats.
MATERIALS AND METHODS: 60 male rats (8 litters) with a body weight of 230250 g were used in the work and three experimental groups were formed: control (n = 20); maternal deprivation (n = 20); social isolation (n = 20). On the 90th day of life, the animals were decapitated, the brain was quickly extracted, placed in the cold and brain structures (hypothalamus, amygdala, prefrontal cortex) were isolated, immediately frozen in liquid nitrogen and stored at a temperature of 80C until PCR analysis was performed. The data obtained were normalized to the expression level of the glyceraldehyde-3-phosphate dehydrogenase (GAPDH) gene and calculated in relative units with respect to the expression value of the GRLN-R gene for each structure separately by method 2 (-DeltaDelta C(T)).
RESULTS: In rats raised in conditions of social isolation, compared with the indicators of the control group and the group of animals with maternal deprivation (p 0.05), an increase in the expression of the GHSR1A gene was noted in the hypothalamus. Whereas in rats after the stress of maternal deprivation in the amygdala there was an increase in the expression of the GHSR1A gene compared with the indicators in the control group of rats.
CONCLUSIONS: 1. In rats that survived weaning from the mother from the 2nd to the 12th postnatal day, a significant statistically significant increase in the expression of the GHSR1A gene was revealed in the hypothalamus in comparison with the control group and the social isolation group. 2. In rats raised in conditions of social isolation from their relatives, a significant statistically significant increase in the expression of the GHSR1A gene in the amygdala was revealed in comparison with the control group and the weaning group.