bluuebunny/crossref_metadata_2025 huggingface dataset:
THE EFFECT OF STEM ACTIVITIES ON THE SCIENTIFIC CREATIVITY AND ACADEMIC SUCCESS OF STUDENTS
Authors: KURTULUŞ Muhammed Akif
Published: December 2023

The purpose of this study is to identify the effect of Lego based STEM (Science-Technology-Engineering-Mathematics) activities on the scientific creativity and academic success of middle-school 6th grade students. In the study, the semi experimental research method which is one of the experimental research methods was used. The study was carried out at a state middle-school in the spring semester of the 2017-2018 academic year. At the school in which the study was carried out, the students were applied the Scientific Creativity Scale (SCS) and the Academic Success Tests. A total of 85 students participated in the study. In the study group, 29 students were separated as the control group, 28 students as experimental group-1 and 28 students as experimental group-2 by the researcher. The application lasted for 7 weeks. In the experiment groups, the physical sciences lessons were taught together with the Lego based STEM activities. In the study, scientific creativity scale and Force and Motion Academic Success Test (FMAST), Properties of Matter Academic Success Test (CMAST), Animals Academic Success Test (AAST) and Sound Academic Success Test (SAST) were used. Whether the pretest-posttest difference related to the groups displayed normal distribution was checked with the Kolmogorov-Smirnov test. In scales and tests in which it was not possible to achieve normalcy assumption, the Wilcoxon Signed Ranks Test and in those in which it was possible toachieve normalcy assumption, the Paired Samples T test was done. In the comparison of the groups’ posttests, the Single Factor Variance Analysis (ANOVA) was carried out. As a result of the study, a significance difference was found in favor of experiment group-1 in the originality dimensions related to SCS. In the analysis of the academic success tests, a significant difference was not found only in the posttest scores related to CMAST. In the posttest results of FMAST, AAST and SAST, a significant difference was found in favor of experiment group 1. In addition, in the analysis in which the posttest scores of the groups related AASTwere compared, a significant difference was found in favor of the experiment groups. As a result of the study, it was determined that the scientific creativity of the students in the experiment groups in which Lego based STEM activities were carried out developed and their academic success increased.
İLK OKUMA-YAZMA ÖĞRETİMİNDE EĞİTSEL OYUNLARIN İLKOKUL 1.SINIF ÖĞRENCİLERİNİN OKUMA MOTİVASYONLARINA ETKİSİ
Authors: DAL Sibel , CENK Gülşen
Published: December 2023

Bu araştırmada, ilk okuma-yazma öğretiminde eğitsel oyunların ilkokul 1.sınıf öğrencilerinin okuma motivasyonlarına etkisi incelenmiştir. Araştırma, nicel araştırma yöntemlerinden olan deneysel desen, deneysel desen modellerinden ön test- son test eşleştirilmiş kontrol gruplu yarı deneysel desen biçiminde tasarlanmıştır. Araştırma Antalya ili Manavgat ilçesine bağlı Kızılağaç beldesinde bulunan bir devlet okulunda gerçekleştirilmiştir. Araştırmanın çalışma grubunu, 2022-2023 eğitim-öğretim yılının güz döneminde 1. sınıfların iki farklı şubesinde eğitim gören 47 gönüllü öğrenci (24’i deney grubu,23’i kontrol grubu) oluşturmaktadır. Deney grubuna haftada 3 saat (120dk) olmak üzere 5 hafta Türkçe, Serbest Etkinlik ve Beden Eğitimi ve Oyun derslerinde ilk okuma ile ilgili eğitsel oyunlar oynatılmıştır. Kontrol grubuna ise herhangi bir işlem uygulanmamıştır. Araştırmanın verileri, “Okuma Motivasyon Ölçeği” ile toplanmıştır. Kullanılan bu test deney ve kontrol gruplarına ön test ve son test olarak uygulanmıştır. Araştırmada deney ve kontrol gruplarının kendi içinde uygulamalar öncesi ve sonrasında ön-test ve son-test sonuçlarını karşılaştırmak için bağımlı örneklemler için t-testine başvurulmuştur. Araştırma da ilk okuma ile ilgili eğitsel oyunların deney grubu öğrencilerinin okuma motivasyonunda belirgin ve anlamlı bir artış sağladığı görülmüştür. Araştırma sonucuna göre eğitsel oyunların 1.sınıf öğrencilerinin okuma motivasyonunu arttığı söylenebilir.
An Efficient Interface Model of User Interaction with a Query-Type Information Service
Authors: Kurta P.
Published: December 2023

The work solves the problem an analytical model constructing of the user interaction interface with an information system designed to provide information based on multi-parameter user requests. The model purpose is to evaluate the effectiveness of the interface and, accordingly, the interaction itself. To do this, using an example of typical work with an interface, the following prerequisites (as conditions) for modeling are introduced: the effectiveness of the interface, its forms and transitions between them, interface elements, the atomic efficiency of the element and form, the order of their arrangement and the empirical dependence of efficiency, as well as the formulation interface design tasks. Using these premises, an appropriate efficiency model has been formed, which allows us too analytically, based on the structure and parameters of the interface, evaluate its effectiveness, operativeness and resource efficiency. A software prototype was created, which was based on the model and with the help of which a number of experiments were carried out under three scenarios, consisting of changing the number of forms and interface elements in order to determine their impact on overall efficiency; the corresponding dependencies were obtained in the form of histograms. Conclusions are drawn regarding the accuracy of the model, its theoretical and practical significance, as well as the overall complexity of designing “ideal” interfaces.
Analyzing Traffic Identification Methods for Resource Management in SDN
Authors: Dmitrieva J. , Okuneva D. , Elagin V.
Published: December 2023

The article is devoted to the analysis of traffic classification methods in SDN network. The review of analytical approaches of traffic identification to identify the solutions used in them, as well as assessing their applicability in the SDN network. Types of machine learning are considered and input parameters are analyzed. The methods of intelligent analysis covered in the scientific articles are systematized according to the following criteria: traffic identification parameters, neural network model, identification accuracy. Based on the analysis of the review results, the conclusion is made about the possibility of applying the considered solutions, as well as the need to form a scheme of SDN network with a module of artificial intelligence elements for load balancing.
Machine Learning vs Software Vulnerability Detection: Applicability Analysis and Conceptual System Synthesis
Authors: Leonov N. , Buinevich M.
Published: December 2023

The article is devoted to the searching for vulnerabilities in software problem, as well as the possibilities of application of such a promising area in information technology as machine learning. For this purpose, a review of scientific publications in this area from Russian and foreign citation databases is made. A comparative analysis of the review's results was made according to the following criteria: publication year, application field, idea, solved problem of machine learning, degree of realization of its models and methods; for each criterion basic conclusions were drawn. As a result, 7 principles of building a new conceptual system of searching for vulnerabilities in software with the help of machine learning are proposed, the short meaning of which is as follows: program's multilateral study, combination of known methods, the use of machine learning in each method and algorithm of its management, the possibility of correcting the expert's work, storing information in a database and its synchronization with external, advisory nature of the found vulnerabilities; single software application usage. Based on the stated principles, a graphical scheme of such a system has been developed.
Structural and functional features of the olfactory epithelium in fish
Authors: Klimenkov I.V. I.V. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Pyatov S.K. S.K. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Sudakov N.P. N.P. ,   Limnological Institute Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia
Published: December 2023

Structural and functional peculiarities of the peripheral part of the olfactory analyzer in fish are considered. The article is devoted to the characteristics of the main types of receptor cells: their morphology, the peculiarities of their location in the olfactory epithelium, and functional specificity. Some data on the threshold values of fish chemosensitivity to chemical agents, which have an important signaling value for them are presented.
Nanoplastic influence on the siliceous sponge Lubomirskia baicalensis
Authors: Danilovtseva E.N. E.N. ,   Limnological Institute of the Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Pal’shin V.A. V.A. ,   Limnological Institute of the Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Zelinskiy S.N. S.N. ,   Limnological Institute of the Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia, Annenkov V.V. V.V. ,   Limnological Institute of the Siberian Branch of the Russian Academy of Sciences, Ulan-Batorskaya Str., 3, Irkutsk, 664033, Russia
Published: December 2023

Effects of plastic nanoparticles on the Baikal siliceous sponge Lubomirskia baicalensis (Pallas, 1773), including the whole organism and primmorphs, were studied. A vital fluorescence dye was applied to visualize the spicules formed during the experiment. Polystyrene, polyvinyl chloride, and poly(methyl methacrylate) nanoparticles were found to be able to penetrate into the sponge body and cause toxic effects (decreased spicule production) starting from concentrations of 0.005-0.01 mg/L. This is a relatively high concentration, unthinkable in normal water bodies. On the other hand, the duration of the experiment (three months) is negligible compared to the life span of the sponge. Further experiments should aim to elucidate the fate of nanoplastics within sponges, the balance between plastic consumption, excretion and degradation, possibly involving sponge symbionts.
Perilla seed oil as an adjunctive treatment with statins improves lipid profiles in elderly patients: a post hoc data analysis
Authors: Chanapuk Rapeebhorn , Mungtaweepongsa Sombat , Sriyakul Kusuma , Tungsukruthai Parunkul , Pattaraarchachai Junya , Kamalashiran Chuntida
Published: December 2023

Background: Dyslipidemia is characterized by abnormal lipid concentrations in the bloodstream, heightening the risk of atherosclerosis. While statins are primarily prescribed to treat dyslipidemia, not all patients benefit from them for various reasons, such as intolerance, myopathy, and hepatotoxicity. Perilla frutescens (L.) Britton, traditionally grown in East Asia, has been used for various therapeutic purposes. The seed oil of this plant is prosperous in omega-3 polyunsaturated fatty acids. Previous research found the efficacy of perilla (P. frutescens) seed oil in reducing cholesterol in patients with dementia. Our study aimed to determine if the lipid-lowering effects of P. frutescens seed oil occur on their own or alongside statin treatments by conducting a retrospective analysis of existing data to assess its efficacy in improving lipid profiles among the elderly.Objective: This study aimed to understand if P. frutescens seed oil inherently possesses lipid-lowering properties or if these effects are amplified when combined with statins.Methods: A retrospective post hoc analysis was performed on 182 geriatric patients previously involved in a dementia study. These patients were categorized into four groups: those administered both P. frutescens seed oil and a statin (G1), only P. frutescens seed oil (G2), only a statin (G3), and neither (G4). The outcomes evaluated post-intervention included lipid profiles, liver and renal functions, complete blood count, and neutrophils to lymphocytes and platelets (N/LP) ratio.Results: Patients in G1 exhibited the most pronounced reductions in total cholesterol and LDL-C levels, suggesting a potential synergistic effect when P. frutescens seed oil is combined with statins. Liver enzyme levels remained stable across all groups, suggesting the hepatic safety of P. frutescens seed oil even when co-administered with statins.Conclusion: P. frutescens seed oil, particularly when used alongside statins, exhibits the potential to improve lipid profiles and may also offer liver protection. However, extended studies are necessary to understand its therapeutic significance in cardiovascular disease management fully.Keywords: Perilla frutescens,omega-3,statins, lipid profile, elderly, hepatoprotection, functional food, bioactive compound
Brytyjska i francuska artyleria na półwyspie Gallipoli w 1915 roku
Authors: Korzeniowski Paweł
Published: December 2023

This article analyses the use of artillery by allied troops during the campaign on the Gallipoli Peninsula in 1915. The insufficient number of guns, meagre supplies of ammunition and the lack of space necessary to prepare firing positions were one of the main reasons for the ineffectiveness of the British and French troops. The causes of these problems and the unsuccessful attempts to solve them are also discussed.
Structural capital in the system of technological development of s
Authors:   Dnipro University of Technology, Pylypenko Yuriy I. , Dubiei Yuliia V. ,   Dnipro University of Technology, Huzenko Іrina Yu. ,   Dnipro University of Technology, Fedorova Nataliya E. ,   SHEI “Ukrainian State University of Chemical Technology”
Published: December 2023

The current state of socio-economic development, characterized by a radical change in the technical and technological paradigm in a globalized world, is marked by new phenomena and processes. In contrast to previous eras, when the formation of new technological methods of production was based on a small number of breakthrough inventions that changed the structure of production, today we observe an avalanche-like development of inventions, the products of which destroy the stability of all spheres of society. Accordingly, all resources possessed by a modern company must meet the requirements of the time in terms of their quality. Under such conditions, not only intellectual capital but also other components, that enable companies to maneuver in their innovative development, become very important. Based on the analysis of modern conceptual approaches to determining the essence of the categories “structural capital” and “intellectual capital”, the article forms the concept of “national structural capital”. The latter is presented as an infrastructure for the formation, implementation and development of national human capital, an organizational and institutional system for the expanded reproduction of knowledge and skills of members of society. For the quantitative measurement of national structural capital, a methodological framework is proposed, which is based on the integral index of national structural capital created by the authors; its components are justified: knowledge & technology outputs, intangible assets, research & development (R&D), knowledge workers, knowledge absorption. Based on the proposed methodology for determining the integral index of national structural capital, its value was calculated for 26 countries for 2018-2020 and the dynamics for the period under study were shown.
GLOBAL ELECTRIC VEHICLE MARKET AND PROSPECTS FOR UKRAINE’S CONTIBUTION TO ITS DEVELOPMENT
Authors:   National University of Bioresources and Nature Management of Ukraine, Prushkivska Emiliia.V. , Prushkivsky Volodymyr. G. ,   National University «Zaporizhzhia Polytechnic», Maksymenko Iryna.Y. ,   National University «Zaporizhzhia Polytechnic», Prushkivska Viktoriia.V. ,   Taras Shevchenko National University of Kyiv
Published: December 2023

The article discusses the features and reasons for the development of electric vehicles in the context of intensifying globalization processes and limited resources. It is substantiated that motorization is a key factor in the development of developed countries. Therefore, the presence of a competitive and well-functioning automotive market is an important condition for successful economic growth. The experience of foreign countries in stimulating the production and consumption of electric vehicles has been studied. Current trends in the development of the global electric vehicle market have been analyzed. It has been found that more than a third of the global market (over 36%) of electric vehicles is occupied by three manufacturers: BYD, Tesla and Volkswagen. An analysis of the global electric vehicle market by country shows that three countries are the leaders in electric vehicle sales: China, Europe, and the United States. It has been observed that China is ahead of other leading countries in terms of electric vehicle consumption, and the following companies have the greatest demand for electric vehicles in its market: BYD, SAIC and Tesla. Chinese manufacturers are showing faster growth rates in electric vehicle production than leading American and European companies. The article classifies the problems of development of the global market for electric vehicles: the global energy crisis, shortage of resource components for electric vehicles, the Covid-19 pandemic, uneven development of countries, institutional factors. Taking into account current global development trends, we conclude that the global electric vehicle market will develop at a rapid pace, effectively solving the problems hindering the growth of electric vehicle production. It has been substantiated that Ukraine has the potential to produce electric vehicles. Using the latest Industry 4.0 technologies and research and production potential, Ukraine can produce cars of a new generation, since developments in this area do not stop. Based on the graphic of the Ukrainian alphabet «Ruthenia», a sample trademark for the national electric vehicle has been developed and proposed. It has been established that this graphic most closely matches the functions and requirements of developing a national trademark. The proposed trademark reflects the features of the national manufacturer, indicates the latest technologies and will attract the attention of consumers.
MAIN INDICATORS OF THE GERMAN LABOR MARKET: QUANTITATIVE ASSESSMENT OF IMPACT ON MACROECONOMIC INDICATORS
Authors:   Alfred Nobel University, Lymonova Elvina , Olevskyi Viktor ,   Dnipro University of Technology, Olevska Yuliia ,   Dnipro University of Technology, Kliuchnyk Ruslan ,   Alfred Nobel University
Published: December 2023

The study of the German labor market makes it possible to assert that Germany is a model of the employment system in the European Union. In the article, the authors studied the main indicators of the country’s labor market: minimum and average wages, nominal and real wages, unemployment rate, immigration to the country. It was revealed that the size of minimum wage rate is influenced not only by the state, but also by employers and trade unions. Thus, in many industries, the minimum wage is higher than the amount established by the state. In addition, the analysis of the size of the average salary demonstrates an important problem of the German labor market - the gender gap in income. In 2021, men earned approximately €700 more than women for equivalent work. The research examines the reasons for this inequality and offers recommendations for overcoming this contradiction. The article calculated the real wage index and found that starting from 2020, prices in Germany grew faster than wages. So, the real wage index for 2022 is -4.0. The main macro indicator of the labor market was analyzed. This is the level of unemployment, which turned out to be lower than the average indicator in the European Union. In addition, the authors draw attention to the problem of the aging of workers and the uneven distribution of the employed across the country’s regions. Thus, 53% of people over the age of 55 are still working in the economy. This is due to the shortage of specialists with higher education among young people. The article describes the immigration process in Germany and reveals an increase in migrants from countries suffering from war and violence. The influence of the number of immigrants on such macroeconomic indicators as GDP, GDP per capita, unemployment rate, and the size of the average wage was analyzed.
IMPACT INVESTMENT IN POST-WAR UKRAINE
Authors:   State University “Zhytomyr Polytechnic”, Zamula Iryna V. , Shavurska Olena V. ,   Interregional Academy of Personnel Management, Tanasieva Maryna M. ,   Chernivtsi National University named after Yury Fedkovych, Travin Vitalii V. ,   State University “Zhytomyr Polytechnic”
Published: December 2023

To restore the economy of Ukraine in the post-war period, it is expedient to work out applicable communication tools with investors. With respect to the global market, there is a noticeable trend towards an increase in impact investments in 2016-2022 by $ 1,050 billion or in other words, 10.21 times. The rapid growth of impact investing at the global level testifies to the significance of investments aimed at achieving the provisions of the concept of sustainable development. The purpose of the study is to elaborate theoretical and practical provisions for information support of impact investing in order to attract financial resources to restore the economic activity of business entities in the post-war period in compliance with the sustainable development guidelines. Having conducted a study of the published non-financial reporting of large and medium-sized industrial enterprises of Ukraine, it was found that only 22.7% thereof prepare a Sustainable Development Report annually. With respect to the selected enterprises group, 91% prepare a management report in an arbitrary form and publish it on their official website. Having conducted a study of published nonfinancial reporting of large and medium-sized industrial enterprises in Ukraine, it turned out that only 22.7% of them annually prepare a Sustainable Development Report. In the selected group of enterprises, 91% prepare a management report in any form and publish it on their official website. However, given the arbitrary form of information presentation, investors cannot fully obtain up-to-date information about the company’s social policy and environmental activities. In addition, the formation of reporting on issues of sustainable development and social responsibility has not yet become widespread among Ukrainian enterprises, which hinders the development of impact investing in Ukraine. Especially with regard to increasing the investment attractiveness of Ukrainian enterprises, the structure has been clarified and meaningful recommendations have been developed regarding the information content of the Management Report, which will contribute to increasing the transparency of reporting and attract influential investors.
Quality of life in patients with pulmonary arterial hypertension
Authors: Kowalkowska Mirosława Anna , Jacuś Beata , Grześk Grzegorz
Published: December 2023

Streszczenie

Przedmiot badań: Jakość życia chorych z tętniczym nadciśnieniem płucnym

Cel badań: Przeanalizowanie poziomu jakości życia chorych z tętniczym nadciśnieniem płucnym.

Materiał i metody: Materiał stanowiły pozycje zwarte i periodyczne poruszające tematykę tętniczego nadciśnienia płucnego oraz jakości życia chorych zmagających się z powyższym schorzeniem. Zastosowano analizę treści.

Wyniki: Jakość życia to spostrzeganie przez jednostkę jej pozycji w życiu w kontekście kultury i systemów wartości akceptowanych przez społeczeństwo, w jakich żyje, oraz w relacji do jej celów życiowych, oczekiwań, zainteresowań. Tętnicze nadciśnienie płucne (TNP) to rzadka postać nadciśnienia płucnego, która jest uwarunkowana genetycznie, może być wywołana przez leki lub toksyny, związane z chorobami tkanki łącznej, zakażeniem HIV, nadciśnieniem wrotnym i wadami wrodzonymi serca. Na tę przypadłość zapadają najczęściej ludzie młodzi – do 35 roku życia – a 2/3 przypadków stanowią kobiety.
Tętnicze nadciśnienie płucne istotnie wpływa na jakość życia chorych – obniża poziom tego wskaźnika. Dostępne badania pokazują, że pomimo dłuższego przeżycia pacjentów z TNP, ich jakość życia (QoL) pogarsza się wraz z postępem choroby. Cele terapii TNP rozszerzyły się z wydłużenia przeżycia na poprawę jakości życia związanej ze zdrowiem. Przeprowadzona analiza pozycji zwartych
i artykułów w tym temacie wykazała, że tętnicze nadciśnienie płucne istotnie wpływa na jakość życia chorych i rzutuje na jego obniżenie. Im bardziej odczuwalne są objawy choroby, tym poziom jakości życia chorego jest niższy. Nowatorskie leczenie i stosowana terapia wpływają na podniesienie poziomu jakości życia opartego na zdrowiu.

Wnioski: Tętnicze nadciśnienie płucne zdecydowanie wpływa na jakość życia chorych i rzutuje na jego obniżenie. Im bardziej odczuwalne są objawy choroby, tym poziom jakości życia chorego jest niższy. Leczenie i stosowana terapia wpływają na podniesienie poziomu jakości życia opartego na zdrowiu.
International experience of raidership
Authors:   “Zaporizhzhia Polytechnic” National University, Tkachenko A. M.
Published: December 2023

Raidership is a constant threat to any business that cannot be predicted and completely eradicated. According to analytical data, raidership is one of the most serious threats to business. Its spread is a consequence of the illusions of business owners who are convinced that by exercising total control over business management. These are only illusions. Raidership as a concept originated in Great Britain. This term was used to describe raids by ships that seized merchant ships from other countries. Over the past 20 years, corporate raids have largely depended on the political, legal, and institutional situation in a country. In developed countries, there is usually no active market for hostile takeovers. Counteracting raidership in different countries of the world involves both general and targeted restrictions on share transactions; creation and compliance with corporate governance codes; and adoption of special laws regulating mergers and acquisitions. Not only governments, but also non-governmental organizations are actively involved in developing general approaches to the principles of protecting business entities from raidership. The efforts of state authorities are primarily aimed at improving corporate legislation to ensure that certain standards of competition, disclosure of information about the company, protection of shareholders' rights and equal treatment are mandatory. The business community is focused on developing corporate governance rules and procedures that would be voluntarily adopted by the business community, comply with internationally recognized principles and take into account national peculiarities. This work resulted in the emergence of so-called Corporate Governance Codes in various developed countries. Such a code is a set of voluntarily adopted standards and internal regulations that establish and regulate corporate relations.
Intellectual capital as a factor of Ukraine’s competitiveness in the conditions of war
Authors:   Taras Shevchenko National University of Kyiv, Lozova Ganna , Kushchinska Olga ,   Taras Shevchenko National University of Kyiv, Spasichenko Oksana ,   Taras Shevchenko National University of Kyiv, Kanishchenko Olena ,   Taras Shevchenko National University of Kyiv
Published: December 2023

In the conditions of the digital economy, intellectual capital is a leading factor in the formation of national competitiveness. Countries with a high level of development of intellectual capital traditionally occupy the first positions in the ranking of global competitiveness, have competitive advantages in global competition and on world markets. As a result of the Russian-Ukrainian war, the intellectual capital of Ukraine suffered huge losses and destruction. During hostilities, Ukrainians die, intellectual resources and values are destroyed. The paper analyzes the loss of intellectual capital from the point of view of loss of human capital, structural capital, and relationship capital. It is considered what functions intellectual capital performs in the economy. Based on the analysis of the Reports of international organizations, the main global trends in the development of IC have been determined. Based on the analysis, it was determined how intellectual capital can become a growth factor for Ukraine in the period of post-war recovery, will allow our country to maintain its competitiveness on world markets and the ability for sustainable economic development. The effectiveness of state programs and government actions taken in 2023 to return specialists to Ukraine has been analyzed. The authors proposed a number of recommendations for increasing the effectiveness of state policy in the field of protection and preservation of national intellectual capital in wartime conditions, developed a number of proposals, the implementation of which will allow the return of a part of Ukrainian migrants to the country, which will contribute to the restoration of Ukraine’s human capital.
The coopetition strategy: a comprehensive analysis of real cases and empirical studies
Authors:   American University Kyiv, Sumy State University, Shvindina Hanna , Balahurovska Inna ,   Joint Doctoral School, Silesian University of Technology, Sumy State University
Published: December 2023

Coopetition strategy (cooperation with competitors) has become a popular approach for firms seeking to simultaneously cooperate and compete with their rivals. This study aims to analyze the effectiveness of coopetition strategy by conducting a comprehensive analysis of real cases and empirical studies. The authors examine the possible benefits and drawbacks of coopetition strategy, and compare the main recent findings in the field. The research methodology involves literature reviews, content analysis, historical method, comparative analysis, and synthesis. The generalization and analysis of real cases of coopetition are based on content analysis of news, newsletters, reviews in the press, reports, and papers published in Scopus database. The most cited papers in the field of empirical research devoted to coopetition are analyzed through content analysis to shed light on the effectiveness of coopetition strategy and provide insights for firms considering implementing this approach. The current study united the analysis of several strategic alliances in the period 2001-2023, and the recent publications in the Scopus database in 2013-2023 years. The variety of findings allows concluding that there are some ideas the scholars and practitioners agreed upon, and some are still in the process of development. Scholars and practitioners have debated several topics, such as the role of power, the relationship between coopetition and innovation, the sustainability of coopetition, and how to manage conflict in coopetition. These topics are important to consider when implementing coopetition strategies in practice. The analysis of real cases and empirical studies offers a comprehensive understanding of the benefits and drawbacks of coopetition, and highlights the factors that contribute to successful coopetition.
Assortment matrix as a basis for assortment planning
Authors:   Ukrainian State University of Chemical Technology, Harmider L. D. , Honchar L. A. ,   Ukrainian State University of Chemical Technology, Serhieieva O. R. ,   Alfred Nobel University, Vinichenko M. М. ,   Ukrainian State University of Chemical Technology
Published: December 2023

The article highlighted the significance of the assortment matrix for a retail enterprise as a basis for assortment planning. That is why the issues of planning and optimizing the range of products do not lose their relevance in modern business conditions. One of the most important tasks in assortment planning is the definition of promising assortment positions for the company. To build the assortment matrix, the results of previous research on the structuring of the assortment based on the results of a combined analysis using the ABC and XYZ methods were used, which made it possible to determine the most demanded product positions and the lack of stability of the assortment at the research enterprise. The formation of the assortment matrix was carried out on the basis of the approved retail trade classifier and the analysis of sales for the period of six months. Taking into account the fact that the capabilities for storing fish products are always limited and require significant expenses, this group was chosen to determine whether the volume of the offered assortment meets consumer demand. The largest share among fish products was taken by canned fish, which is why the assortment matrix was compiled for this product group. The basis of the assortment was formed by canned fish snacks, with the volume of cans from 150 to 200 grams and more. The analysis of the assortment of canned fish was carried out according to their share in the profit for the first half of 2021, due to the volume of packaging, and, in addition, the number of product items was also determined. Next, the segments were combined by types of canned goods and by volume of packaging. To form an assortment matrix, price segmentation was carried out, distinguishing the economy, mass and premium segments, which determined the number of product positions of each type of canned food in different price segments. The last step was to conduct a study of each trademark of various types of canned food, where the analysis of sales by profit share was used, an ABC analysis was performed, and the number of product positions per trademark was determined. The assortment matrix, built in the end, showed that 48 items of canned fish are not in demand by consumers, and therefore should be excluded from the assortment.
Renewable energy sources impact on economic growth: international practices
Authors:   Prydniprovska State Academy of Civil Engineering and Architecture, Bozhanova Viktoriia , Kononova Oleksandra ,   Prydniprovska State Academy of Civil Engineering and Architecture, Dodu-Savca Carolina ,   Academy of Economic Studies, Dodu-Gugea Larisa ,   Academy of Economic Studies, Chernysheva Olena ,   Ukrainian State University of Chemical Technology
Published: December 2023

Energy is an indispensable source of power for economic development. Mainstream research has concluded that energy can be divided into two types: renewable and non-renewable. Research analyzing the impact of non-renewable energy on economic development is very comprehensive. Researchers dispute the association between expanding the usage of renewable energy sources and stimulating the economy. They investigated the connection between economic growth and energy use in developing countries. The paper assesses the impact of the energy transition to renewable energy sources driving the economic growth of countries. It has been established that positive transformations in economies can be seen both developed and emerging economies. It has been proved that economic growth, once the national energy becomes autonomous (examples of Iceland, Uruguay), ensures the economy protection from external fluctuations in energy prices and guarantees electricity generation at prices lower than those set for the energy produced from fossil sources. The paper shows that freedom from additional financial burden for businesses is a critical precondition for the stable development of the economy during the energy transition period. It is indicated in the paper that if the state cannot carry out such a transition on its own, there are good reasons to engage large businesses and other participants in this process on favourable contractual terms. It has been found that such actions will promote increased investments in the development of renewable power generation in the country. The paper studies the main opportunities for economic growth resulting from the energy transition, including price advantages for power generation (prices for electricity produced using alternative sources are cheaper than those for electricity produced from fossil sources), driving the entrepreneurial activity, as well as the possibility of exporting energy produced from renewable source. The scientific novelty of our research is in the development of the question of the energy impact transition on the economic growth of countries with different financial, economic and energy potential, through the establishment of specific characteristics of this process, which can contribute to the modeling of its implementation at the level of other states, including Ukraine.
Distribution of regions by their functional type, as a stage for assessing the socio-economic efficiency of the country’s post-war development
Authors:   State Institution “VK Institute of Economic and Legal Research Mamutov” National Academy of Sciences of Ukraine, Martynovych N.
Published: December 2023

The war is still raging, but it is already clear that advance planning is needed to ensure survival and prepare for Ukraine's recovery from the destruction caused by Russian aggression. The damage and losses caused by the aggressor to Ukrainian regions amount to billions of dollars, which are already being received and will continue to be received in the form of international technical assistance, reparations, investments, etc. These funds will be distributed across the regions, taking into account the extent of their destruction, in the relevant areas (priorities). This process requires clear arguments from the government and local authorities on the targeting of both funds and priorities that characterise effectiveness. Therefore, there is a need to find effective tools for assessing the socio-economic efficiency of post-war reconstruction. Thus, the purpose of the article is to develop a methodological support for the distribution of territories according to their functional purpose and practical implementation of the assessment of socio-economic efficiency of post-war reconstruction of the country. The conceptual foundations of the proposals presented in the article are based on current legislation, general scientific methods of cognition, theoretical and empirical orientation. On the basis of the matrix method, a system of coordinates is built to distribute the regions of Ukraine by their functional type. The choice of individual indicators as the abscissa and ordinate axes is substantiated. By converting natural indicators into relative ones, the initial data for the distribution of regions by their functional type are formed. For the purpose of further comparison of data, the average value for each indicator and region in the dynamics for five years is calculated. The proposed approach allows for a substantive approach to determining the priorities of post-war development, taking into account the typology of territories and their compliance with the basic conditions and opportunities for development, as well as the degree of destruction as a result of hostilities.
A Classifier Model to Detect Phishing Emails Using Ensemble Technique
Authors: Nthurima Fredrick , Matheka Abraham
Published: December 2023

Phishing attacks usually take advantage of weaknesses in the way users behave. An attacker sends an email to the recipient that mimics a genuine email with phishing links. When the recipient clicks on the embedded links, the attacker can harvest critical information like credit card numbers, usernames or passwords as a result of entering the compromised account. Online surveys have put phishing attacks as the leading attack for web content, mostly targeting financial institutions. According to a survey conducted by Ponemon Institute LLC 2017, the loss due to phishing attacks is about $1.5 billion annually. This is a global threat to information security, and it’s on the rise due to IoT (Internet of Things) and thus requires a better phishing detection mechanism to mitigate these losses and reputation injury. This research paper explores and reports the use of multiple machine learning models by using an algorithm called Random Forest and using more phishing email features to improve the accuracy of phishing detection and prevention. This project will explore the existing phishing methods, investigate the effect of combining two machine learning algorithms to detect and prevent phishing attacks, design and develop a supervised classifier to detect and prevent phishing emails and test the model with existing data. A dataset consisting of benign and phishing emails will be used to conduct supervised learning by the model. Expected accuracy is 99.9%, with a rate of less than 0.1% for False Negatives (FN) and False Positives (FP).
Investigation of a Nonlinear XNOR Logic Gate Based on an Induced Nonlinear Phase Shift of Spin Waves
Authors: Haponchyk R. V. , Tatsenko I. Yu. , Vitko V. V. , Stashkevich A. A. , Goto T. , Ustinov A. B.
Published: December 2023

Introduction. Recent years have seen a growing interest in studying the nonlinear properties of spin waves. Nonlinear phenomena, such as envelope solitons, nonlinear frequency shifts of intense spin waves, and etc., have attracted particular attention. However, a number of important issues remain to be underexplored, including the problem of induced nonlinear phase shift of spin waves. The relevance of this problem is related to the need to develop spin-wave logic gates that could be controlled by changing the spin wave phase.

Aim. To study a nonlinear XNOR logic gate whose operation is based on the induced nonlinear phase shift of a spin wave.

Materials and methods. An original theory is used to simulate the frequency response of a nonlinear XNOR logic gate. The operating principle of the nonlinear XNOR logic gate is substantiated. The possibility of implementing the nonlinear XNOR logic gate in a circuit similar to a spin-wave Mach-Zehnder interferometer is experimentally demonstrated.

Results. An experimental study of the induced nonlinear phase shift of operating signals incident on identical nonlinear spin-wave phase shifters located in the arms of the logic gate was carried out. It is shown that an increase in the pump signal power up to 60 mW, supplied to nonlinear phase shifters, changes the induced nonlinear phase shift of the operating signal by more than 180°. Hence, nonlinear phase shifters can be used for constructing spin-wave logic gates. In addition, the operating principle of a spin-wave logic gate was experimentally studied. It is shown that the XNOR logical function is implemented in the low-frequency part of the device’s frequency response characteristic.

Conclusion. Numerical simulation of the characteristics of a nonlinear XNOR logic gate based on the Mach-Zehnder interferometer circuit was carried out. It is shown that its logical functions are implemented due to the effect of an induced nonlinear phase shift of spin waves in nonlinear phase shifters located in different arms of the logic gate.
Scientific and Engineering Proposals for Improving the Noise Immunity of Receiving Multi-Position Signals in Channels with Variable Parameters
Authors: Bibarsov M. R. , Dvornikov S. V. , Kryachko A. F. , Pshenichnikov A. V.
Published: December 2023

Introduction. An important task faced by the developers of modern telecommunication systems consists in increasing the noise immunity of signal reception in channels with variable parameters. Thus, the communication lines of DVB-T2, DVB-S, and DVB-S2/S2 standards widely apply signal structures (SS) of multi-position quadrature amplitude modulation (M-QAM). However, an analysis of scientific publications shows that the random nature of the phase change of the transformed signal constellation leads to a loss of noise immunity of the M-QAM signals. Engineering solutions for the effective reception of such signals are lacking. The proposed block diagram of a device for receiving quadrature amplitude signals and the developed operation algorithm for an amplitude-phase detector allow random phase changes to be considered and reduced.

Aim. Development of scientific and engineering proposals to improve the efficiency of receiving M-QAM signals in radio channels with random phase changes.

Materials and methods. The study was conducted using the methods of noise immunity research, as well as communication theory and signal theory.

Results. A block diagram of a device for receiving quadrature amplitude signals and an operation algorithm for an amplitude-phase detector were proposed, which allow random phase changes to be considered and compensated for. Scientific and engineering proposals were formulated to improve the noise immunity of M-QAM reception in channels with variable parameters.

Conclusion. The developed scientific and engineering proposals for increasing the noise immunity of multi-position quadrature signals in channels with variable parameters substantiate both the feasibility of using a transformed SS M-QAM with improved energy characteristics, as well as the application of the developed receiving device for processing quadrature amplitude signals and the operation algorithm of an amplitude-phase detector. The results obtained make it possible to perform demodulation with simultaneous compensation of phase distortions to increase the noise immunity of M-QAM signal reception.
Formation Model for Acoustic Characteristics of Solid Media with Ordered Fracturing
Authors: Abbakumov K. E. , Vagin A. V. , Vjuginova A. A. , Sidorenko I. G. , Sergeev S. S.
Published: December 2023

Introduction. The development of new structural materials and improvement of existing technologies for the production of new products on their basis lead to the emergence of new types of medium discontinuities. Therefore, the development of new models of discontinuities that take the previously ignored parameters into account seems to be relevant for the purposes of nondestructive testing and structural measurements. This concerns, e.g., the roughness of adjacent surfaces of microcrack ordered sets.

Aim. Theoretical substantiation for the processes of elastic waves propagation through an elastic medium containing an ordered lattice of microcracks with boundary conditions in the linear slip approximation, modified by taking into account the parameters of micro-convexities of microcrack rough boundaries. Database formation for experimental studies aimed at determining the physical and mechanical characteristics of structural materials.

Materials and methods. The acoustic characteristics of materials were determined based on the derivation and solutions of dispersion equations describing the formation and propagation of effective longitudinal, transverse, and Rayleigh surface elastic waves in elastic media with ordered cracking. Their values were also used to determine the effective speed of Rayleigh surface waves.

Results. The conducted simulation of elastic wave formation processes showed that an increase in the concentration of microcracks leads to a decrease in the phase velocities of effective longitudinal, transverse, and surface waves, as well as to an increase in the attenuation coefficients at given ultrasound frequencies and material parameters.

Conclusion. The radius of the microsphere that replaces the surface micro-convexity and the roughness parameter Rz have a significant impact on the formation of physical and mechanical characteristics of materials, which are determined by the results of ultrasonic measurements. The developed model can be recommended as a basis for interpreting the results of ultrasonic measurements.