bluuebunny/crossref_metadata_2025 huggingface dataset:
Informal Education as a Method of Young Specialist`s Anxiety Overcoming
Authors: Rubel Nataliia
Published: June 2021

The article shows the effectiveness of informal education assistance as a method of young specialist`s anxiety overcoming study. The sample consisted of 150 people between the ages of 21 and 49, divided into three groups. The first group included 44 people, short-term students, the second group (60 people) – middle-term students, and the third group (46 people) – long-term informal education assistance courses. We used Spilberger-Khanin`s anxiety test to define the level of personal and situational anxiety. To define professional difficulties, we used a half-structured interview and self-report.
Short-term educational programs students have a low level of personal anxiety and middle-level situational anxiety, which changed slightly after the educational program (the difference is insignificant). The members of this group, as usual, have about 2 years of work experience and apply for academic help on specific professional issues.
Middle-term educational programs participants mostly do not have work experience are somewhat confused about their professional specialization (for example: «I want to work with children or with adults, I do not know», «I want certain instruments, but I am not sure if I need them»), do not see the point of an in-depth study that or another theme. At the beginning of the course, they have a high level of personal and situational anxiety. They try to get the basics for the future work, quite quickly overcome the confusion, in studying situational anxiety of this group decreased with a significant difference (p < 0.05).
Examined members of long-term educational programs have a middle level of individual and situational anxiety at the beginning. They try to understand many professional issues and feel tension and confusion. Situational anxiety in this group decreased with a significant difference (p < 0.05) in the process of studying. Members of this group feel the necessity to set goals and to plan their professional activity (for example: «I do not know where to start», «I do not understand why we need to do this», «I need consistency in work»), that is why they choose programs with a significant substance and content.
The proposed system of educational assistance is based on the problem-oriented approach. We have identified the lack of beginner’s practical skills, tools, and professional activity techniques as the main problem that leads to difficulties during a professional crisis. We suppose that overcoming this deficit affects changes in specialists’ activity quality and their psycho-emotional condition.
Our study results suggest that the proposed program of informal education has a positive effect on overcoming anxiety during the professional development crisis.
DÜZCE BÖLGESİNDEKİ FİRMALARIN ENDÜSTRİ 4.0 YAKLAŞIMI
Authors: Yıldız Mehmet Selami , Yıldırım Yıldırım , Kesici Buşra
Published: June 2021

Endüstri 4.0 kavramı ortaya atıldığı 2011 yılından beri teknolojik bir heves olmaktan çok işletmeler için zorunlu bir rekabet aracı haline gelmiş ve işletme içindeki her birim bu teknolojik gelişmelerden istifade ederek daha verimli sonuçlar elde etmeye başlamıştır. Üstelik büyük işletmelerin değil KOBİ’lerinde rağbet göstermeye başladığı yeni endüstriyel araçlar, kar pastasından daha fazla pay alabilmenin bir yolu olarak görülmeye başlanmıştır. Bu çalışmanın temel amacı Düzce bölgesinde bulunan işletmelerin Endüstri 4.0 konusundaki yaklaşımını ve algısını incelemektir. Belirlenen amaca hizmet etmesi için araştırmanın evreni Düzce ili olarak belirlenmiştir. Düzce il merkezinde yer alan ve Düzce Ticaret ve Sanayi Odasına kayıtlı aktif işletmeler araştırma birimi olarak kabul edilmiştir. Araştırmada kolayda örnekleme yöntemi kullanılmıştır. 69 işletmeden anket tekniği kullanılarak veriler elde edilmiştir. Toplanan verilere frekans, faktör, korelasyon ve regresyon analizleri uygulanmıştır. Yapılan analiz sonuçlarına göre, işletmelerin Endüstri 4.0’a yönelik genel bilgi düzeyi ile strateji ve organizasyon boyutundaki yaklaşımları, onların yenilik eğilimlerini arttırmaktadır. Endüstri 4.0’a yönetim ve organizasyon boyutundaki yaklaşımları da diğer kurumlarla (üniversiteler, ekonomik kalkınma kuruluşları, teknoloji transfer ofisleri, danışmanlık şirketleri vb.) işbirliği seviyelerini pozitif yönlü olarak etkilemektedir. Ayrıca, işletmelerin Endüstri 4.0 teknolojilerine önem verdikleri fakat bu teknolojilerden yeteri kadar yararlanamadıkları görülmüştür. Yani işletmelerin birçok Endüstri 4.0 aracına önem verdiği ancak daha az sayıda Endüstri 4.0 araçlarından yararlandığı ortaya çıkmıştır. Bütün Endüstri 4.0 araçlarına verilen önem düzeyinin yararlanma düzeyinden daha yüksek ortalamaya sahip olduğu, işletmelerin yeni gelişen teknoloji araçlarını önemsediği fakat aynı düzeyde yararlanmadığı sonucuna ulaşılmıştır. Ayrıca işletmelerin en çok kablosuz iletişim teknolojileri ile sensör teknolojilerinden yararlandığı en az ise robot ve otomasyon, makine öğrenimi ve yapay zekâ gibi konularda olduğu görülmüştür.
PANDEMİDE EĞİTİMLE İLGİLİ MAKALELERİN TEMATİK ANALİZİ
Authors: Taşkın Pelin , Kuru Cetin Saadet
Published: June 2021

2020 yılının Mart ayında ilan edilen pandemi nedeniyle yüz yüze eğitim öğretim faaliyetlerine ara verilmiş ve bu faaliyetler tümüyle internet üzerinden sürdürülmeye başlanmıştır. Uzaktan eğitim kavramı yeni olmamakla birlikte, pandemi süreciyle kaçınılmaz ve zorunlu hale gelmiş ve eğitim hizmeti üzerinde çeşitli etkiler yaratmıştır. Bu etkileri incelemek için, Türkiye’de ve dünyada çeşitli araştırmalar yapılmıştır. Bu araştırmanın konusu, Türkiye’de ve Dünyada ne tür akademik yayınların yapıldığının ve bu yayınların eğilimlerinin neler olduğunun belirlenmesidir. Bu doğrultuda, pandemi dönemiyle ilgili eğitim araştırmalarının hangi temalar üzerinde gerçekleştirildiği ve hangi araştırma yöntemlerinin kullanıldığı araştırılmıştır. Nitel araştırma yöntemlerinden tematik içerik analizi ile yürütülen bu araştırmada, araştırma konularına göre “pandemi döneminde uzaktan eğitim”, “eğitim basamağına göre pandemide eğitim”, “disiplinlere göre pandemide eğitim”, “pandemide eğitim hakkı” ve “pandemide eğitim politikası” ile ilgili araştırmaların yayımlandığı ve bu araştırmaların yöntemlerinin “nicel”, “nitel”, “karma” ve “literatür tarama” olduğu ortaya çıkarılmıştır.
Review of Non-Technical Losses Identification Techniques
Authors: Pal Kalyan
Published: June 2021

Illegally consumption of electric power, termed as non-technical losses for the distribution companies is one of the dominant factors all over the world for many years. Although there are some conventional methods to identify these irregularities, such as physical inspection of meters at the consumer premises etc, but it requires large number of manpower and time; then also it does not seem to be adequate. Now a days there are various methods and algorithms have been developed that are proposed in different research papers, to detect non-technical losses. In this paper these methods are reviewed, their important features are highlighted and also the limitations are identified. Finally, the qualitative comparison of various non-technical losses identification algorithms is presented based on their performance, costs, data handling, quality control and execution times. It can be concluded that the graph-based classifier, Optimum-Path Forest algorithm that have both supervised and unsupervised variants, yields the most accurate result to detect non-technical losses.
Advanced and Innovative Optimization Techniques in Controllers: A Comprehensive Review
Authors: Tiwary Aditya
Published: June 2021

New commercial power electronic controllers come to the market almost every day to help improve electronic circuit and system performance and efficiency. In DC–DC switching-mode converters, a simple and elegant hysteretic controller is used to regulate the basic buck, boost and buck–boost converters under slightly different configurations. In AC–DC converters, the input current shaping for power factor correction posts a constraint. But, several brilliant commercial controllers are demonstrated for boost and fly back converters to achieve almost perfect power factor correction. In this paper a comprehensive review of the various advanced optimization techniques used in power electronic controllers is presented.
DEFORMATION TRANSVERSE SHEAR BENDING STATE OF A THIN PLATE LAYER OF AN ANISOTROPIC GEOLOGICAL MEDIUM FROM THE ACTION OF CONCENTRATED ENERGY IMPULSES
Authors: Kolesnikov Ilya , Tatarinov Viktor , Tatarinova Tatiana
Published: June 2021

A method is proposed for study the structural stability of the deformation state of structural blocks of the earth's crust, approximated in the form of plate layers of the geological medium when transverse shear bending from the action of concentrated energy impulses. Advances here are carried out in the two directions. First, in contrast to the previous article, the physical and mechanical model of the geological medium is endowed with anisotropic properties, which makes it possible to increase the adequacy of the obtained numerical results to the specifics of the real problem. Secondly, instead of the simplest bilinear 4-node finite elements, the special spectral non-algebraic 8-node finite iso-parametric finite elements are used, the use of which significantly increases both the accuracy of calculations and their reliability in the sense of ensuring the robustness of calculations for relatively small values of the plate thickness. It should be noted that the Finite Element Method uses exclusively only algebraic finite elements (power polynomials in the h-version and orthogonal polynomials in the p-version). It is known from approximation theory that the use of spectral non-algebraic approximations improves the quality of approximations. Therefore, their introduction into the structure of finite element calculations can improve the quality of modeling in the study of the strain-stress-state (SSS) of the geological medium. A structural block (SB) is understood as a plate layer with plan dimensions exceeding the thickness by more than 10 times. The identification of hazardous zones in the rock massive due to stress concentration is complemented by the development of mechanical, mathematical and computational tools for modeling the curvature of the earth's crust during bending based on the classical theory of Kirchhoff and refined Reissner-Mindlin theory. Test calculations have shown that the accuracy of the calculation and the quality of geometric modeling of fragments of an anisotropic geological environment based on the refined 8-node spectral finite element is significantly better than for the 8-node algebraic finite
INDUSTRY 4.0 – ADVANTAGES ANDCHALLENGES IN THE REPUBLIC OF BULGARIA
Authors: Nenov Nicholay Hristov
Published: June 2021

A retrospective review of the innovation process with its advantages, as well as the challenges in the conditions of Industry 4.0 in the Republic of Bulgaria. The emphasis is on digitalization and the strategy for its implementa-tion, as part of the national strategy for increasing the competitiveness of production and the economy.
THE USE OF DIGITAL COMMUNICATIONS TOOLS BY LATVIAN ENVIRONMENTAL NGOS
Authors: Vasiliev Denis
Published: June 2021

Successful nature conservation requires engagement of diverse groups of stakeholders. Attracting attention of general public and engagement of local communities that underpin sustainable development are between the most important aspects of effective communications by environmental non-governmental organizations (ENGOs). In the modern world digital tools provide unprecedented opportunities for broadening reach of ENGO communications. In Latvia, many organizations including ENGOs use digital tools as a part of their communications mix. However, it is important to understand to what extent the power of digital strategies is utilised by these organisations. For this purpose, analysis of Latvian ENGO digital strategies was undertaken. The analysis involved evaluation of digital usage by top Latvian ENGOs in comparison to application of online communications tools by similar organizations in Western Europe and in the USA. It was found that while Latvian ENGOs actively use digital communications tools, in comparison with western organizations a range of approaches that make online strategies effective is still underutilised. This may generally reduce reach of the communications and their public appeal. Ultimately, underuse of opportunities provided by digital communication tools may weaken effectiveness of nature conservation at a regional scale. Thus, it is suggested to enhance digital communications taking an example from Western ENGOS by introducing more educational and engaging content in a variety of formats, ranging from audio to video materials. Detailed recommendations based on findings of present review are provided.
ASSESSING MERCURY POLLUTION USING BLACK STORK EGGSHELLS
Authors: Abola Anda , Strazds Maris , Gavare Zanda , Veilande Rita
Published: June 2021

Female birds whose bodies contain environmental contaminants produce eggs with shells that are likewise contaminated, making bird eggshells appropriate indicators for monitoring environmental toxins. Common contaminants include organic mercury compounds, especially methylmercury, which are known to bioaccumulate and biomagnify in the food chain. Black storks (Ciconia nigra) predominantly consume fish and are thus at risk for high mercury intake. In this study, we used eggshells of black storks as a proxy to reconstruct the concentration levels and distribution of mercury, a well-known toxic element, in various parts of Latvia. Preliminary analyses have shown that deposition levels of mercury vary in different parts of the eggshell. Specifically, the shell and shell membrane differ in their level of mercury contamination by an average factor of nine; therefore, we measured the mercury content in these components separately whenever possible. We analysed 34 eggshell samples from nesting sites in Latvia using an atomic absorption spectrometer with Zeeman correction Lumex RA-915M and its attachment for pyrolytic combustion. We found that mercury concentrations varied from 5 to 22 ng/g in eggshells and from 42 to 293 ng/g in shell membranes. We discuss possible contamination sources and reasons behind this disparity.
COMPARISON OF AS, HG AND TL HIGH-FREQUENCY ELECTRODELESS LAMPS FOR DETECTION OF ENVIRONMENTAL POLLUTION
Authors: Zorina Natalja , Skudra Atis , Revalde Gita , Gavare Zanda
Published: June 2021

Nowadays, there is an increasing necessity to determine the concentration of different substances in the environment in low concentrations, as more and more attention is paid to environmental pollution. This work is devoted to the comparison of main characteristics of high-frequency electrodeless light sources with different fillings for their use in high precision atomic absorption analysers.The spectral line intensities and profiles were studied in special design light sources, manufactured at Institute of Atomic Physics and Spectroscopy, with arsenic, mercury and thallium filling. Special attention is devoted to the UV lines of 193.7 nm and 197.2 nm of As, 276.8 nm, 377.6 nm of Tl and 253.7 nm of Hg spectral lines. The intensities and profiles were measured by means of a Fourier transform spectrometer.The deconvolution procedure was implemented to obtain the real form of emitted profiles for further analysis, since in the case of low –pressure or cold plasma, the instrumental function is on the same order that experimental profile and it has to be taken into account. The instrumental function can distort the real spectral line shape significantly, for example, it changes the width of the spectral line that leads to the uncertainties in the determination of such important plasma parameters like temperature. The instrumental function can conceal a detailed structure of the spectral line, like the dip in the line center caused by the self-absorption (self-reversal) and characterizing the radiation trapping.The integrated areas, values of self-absorption, and other parameters were obtained and compared for all fillings as a function of working regimes.
THE DEVELOPMENT PROBLEMS OF BIOLOGICAL BEEKEEPING
Authors: Krampuža Ilga
Published: June 2021

Beekeeping is an integral part of the European agricultural production. More than 620 000 beekeepers work in the beekeeping branch of the European Union. Beekeeping is recognised to be an activity, which has an essential significance in the sustainable development of the rural areas, in the job-creation, the conservation of the ecosystem’s biological diversity, and in the maintenance of ecological balance. The basic principle of biological beekeeping is the production of as natural produce as possible. The study uses the analytical method to explore the current situation in the biological beekeeping sector. The analytical and comparative method helped to identify the problematic issues concerning the implementation of the beekeeping process and support measures. To study different views on the problems of biological beekeeping, the following methods for interpretation of legal norms were used: grammatical, systemic, teleological, and historical. The inductive and deductive scientific research methods were used to draw conclusions regarding current normative regulations and to recommend possible solutions.
RESEARCH OF BIOMASS MICRO-COGENERATION SYSTEM INTEGRATION WITH A SOLAR PV PANELS IN ZERO-ENERGY FAMILY BUILDING
Authors: Kramens Janis , Vīgants Edgars , Liepiņš Ivars , Terjanika Viktorija
Published: June 2021

Nowadays, any economic development is based on its sustainability. On the other hand, sustainability of the economy is no longer conceivable without efficient use of resources. Climate change and environmental degradation affects everybody and have no borders. It is essential, that all countries, regardless of their existing resources, are involved in environmental matters. The European Union (EU) has taken the initiative and has seen the possibility of transforming climate change into a guiding theme for sustainability and development in the economy. The EU has developed a green policy in order to transform all economic sectors into sustainable use of resources. EU is planning to achieve climate neutralisation in all sectors of the economy by year 2050. In order to achieve this objective, only the transformation of the industrial, transport and energy sectors will not be sufficient. The activity and willingness of each individual to achieve these objectives at their own household level will be crucial. It should change habits in all sectors important for households: food, transport, waste management and decreasing energy consumption in all mentioned sectors. Solar PV panels traditionally are used to reach zero balance, but taking in to account climatic conditions and seasonable solar irradiation activity, they can operate successfully during the summer and partly during the spring and autumn season. During the heating season, the efficiency of solar PV panel systems is very low. Use of innovative micro-cogeneration equipment producing both heat and electricity is more efficient during heating season in Latvia.In this paper case study of innovative biomass Stirling engine micro-cogeneration system integration with a solar PV panels in zero-energy family building will be present.
ALTERNATIVE UV LIGHT SOURCES FOR SURFACE DISINFECTION
Authors: Skudra Atis , Mezule Linda , Spunde Karina , Revalde Gita , Zajakina Anna , Ziņģe Madara , Juhna Tālis
Published: June 2021

Mercury UV-C light sources are long known to be efficient for microbial inactivation and have been widely used. At the same time, the radiation, if used in inappropriate doses and spectral regimes, can also cause harmful effects to human tissue. The aim of the study was to evaluate the applicability of the novel UV light sources from thallium – antimony at different UV-C. For the research specially made light sources were produced. The influence of UV-C radiation in the range of 200 - 280 nm was tested on Gramnegative bacterium Escherichia coli, both with mercury and thallium. More than 99.99 % inactivation of E. coli cells was obtained after 10 min contact time for thallium – antimony UV-C light source, demonstrating the potential of the produced lamps.
IMPACT OF CULTIVATION TECHNOLOGIES ON SOYBEAN PRODUCTION AND QUALITY
Authors: Jansone Inga , Sterna Vita , Stramkale Veneranda , Stramkalis Aldis , Justs Arnis , Zute Sanita
Published: June 2021

Legumes are considered the second most important food source after cereals. One of high protein legume – soybeans is new species for growing in Latvia. Biochemical composition of soybeans is variable dependent on varieties, and highly affected by environmental factors, including fertilisation and the presence of Rhizobium bacteria. Therefore, the present study was conducted to evaluate a chemical composition of soya (Glycine max L) differently fertilized and grown in different places in Latvia. In this study was evaluated protein, fat, fibre content and yield of soybean variety ’Laulema’ grown at different (F1-F6) fertilisation background in Stende and Vilani. Overall results of a three-year analysis (2018-2020) showed that the protein content of soybean ‘Laulema’ ranged from 31.0 to 38.9%, values of total crude fat ranged from 19.4 to 22.4, but crude fibre 10.5-13.7%. Significant difference was observed among fertilisation background, year and climatic conditions. Soybean productivity depends to a large extent on climatic conditions. Providing favourable conditions for the development of Rhizobium bacteria and the availability of balanced nutrients for plants, soybean yield can reach 2 - 3 t ha-2 also in Latvia
REVIEW OF CHARACTERISTICS OF ALNUS GLUTINOSA STANDS QUALITY ACCORDING TO FOREST TYPES AND AGES
Authors: Miklašēvičs Ziedonis
Published: June 2021

Due to the interest in Alnus glutinosa as the plantation species has increasesed in Latvia during last years, a structural unit “LVM Sēklas un stādi” of State Stock Company “Latvijas Valsts Meži” (Latvia’s State Forests) offers to the local market Alnus glutinosa bare root seedlings with an advanced root system obtained from Alnus glutinosa seeds growed in planting such selected seedlings in cutovers and for land reforestation theorectically will allow the land owner to increase the value of forest and the profit from its management. Practically, this prospects should be evaluated from the perspective of forest health.Therefore, the purpose of this study were to: (1) estimate the incidence of heart colouring and stem decay in Alnus glutinosa stands in different forest types and ages, (2) identify and measure heart colouring area /heartwood hard rot stage area diameter and soft rot stage area diameter/ cavity diameter of the stumps, (3) evaluate the relationships between stand species composition (forest types) and Alnus glutinosa stands age  on heart colouring/heartwood hard rot stage and soft rot stage/cavity incidence, (4) by analysing the results to work out  the recommendations  to improve  the  forest managment in forest stands where Alnus glutinosa stands from plantations are growing.
BIOGAS PRODUCTION POSSIBILITY FROM AQUACULTURE WASTE
Authors: Osipovs Sergejs , Pučkins Aleksandrs , Pupiņš Mihails , Kirilova Jeļena , Soms Juris
Published: June 2021

The research explores the possibilities of biogas extraction from aquaculture waste. Samples of fish-farming pool sludge were taken from a fish farm, which is located in the Krāslava district, Kalnieši rural municipality. Prior to experimental fermentation and extraction of biogas, samples were analyzed in order to determine their moisture and organic matter content (OMC). For purpose of increasing OMC available for fermentation, sludge was mixed with crushed reeds. Biogas was obtained from the samples at various ratios of sludge and reed residues. During the experiments, 3.81 liters of biogas were obtained from a mixture of fish-farming pool sludge and crushed reed at reed mass 100 g. The results of experimental research indicate that aquaculture residues can be used to produce biogas.
EVENT-DRIVEN MANAGEMENT OF ECONOMICS AND THE EXIT OF ECONOMICS FROM STAGNATION
Authors: Solozhentsev Eugene
Published: June 2021

The work describes the developed cortege and mathematical model for managing the quality of development and exit of the system from stagnation. The scientific problem of economics  development is formulated on the basis of artificial intelligence, algebra of logic and logical-probabilistic calculus.
DOMINANT STRATEGIC TRADE POLICY
Authors: Melnik Valentin
Published: June 2021

In implementing trade policy measures, governments usually select from a range of instruments including quotas, subsidies (explicit or implicit) and tariffs. In this paper we consider the potential gain of a government pursuing a two-part trade policy: an import license for entry, along with a per-unit tariff on imports. The model is a three-step game between home and foreign countries in the Cournot duopoly. The paper demonstrates that two-part trade policy is dominant.
INDUSTRY 4.0:SOCIAL CHALLENGES AND RISKS
Authors: Marzano Gilberto , Ochoa Siguencia Luis
Published: June 2021

Industry 4.0 is a term first introduced by the German government during the Hannover Messe fair in 2011 when it launched an initiative to support German industry in tackling future challenges. It refers to the 4th industrial revolution in which disruptive digital technologies, such as the Internet of Things (IoT), Internet of Everything (IoE), robotics, virtual reality (VR), and artificial intelligence (AI), are impacting industrial production.The new industrial paradigms of Industry 4.0 demand a socio-technical evolution of the human role in production systems, in which all working activities of the value chain will be performed with smart approaches.However, the automation of processes can have unpredictable effects.Nowadays, in a smart factory, the role of human operators is often only to control and supervise the automated processes. This new condition of workers brought forth a paradox: malfunctions or irregularities in the automated production process are rare but challenging.This article discusses the challenges and risks that the 4th industrial revolution is bringing to society.It introduces the concept of the Irony of Automation. This propounds that the more reliable an automated system, the less human operators have to do and, consequently, the less attention they pay to the system while it is operating.The authors go on to discuss the human-centered approach to automation, whose purpose is not necessarily to automate previously manual functions but, rather, to enhance user effectiveness and reduce errors.
COVID-19 AND EDUCATION MANAGEMENT: THE CASE OF SILESIAN REGION - POLAND
Authors: Ochoa Siguencia Luis , Marzano Gilberto , Ochoa-Daderska Renata , Gródek-Szostak Zofia , Szeląg-Sikora Anna
Published: June 2021

COVID-19 outbreak has changed the economic and social relations and caused a critical impact on the higher education system. The closure of University campuses to prevent community transmission of the Coronavirus SARS-CoV-2 has shifted face-to-face classes to online learning, distance learning, e-learning, mobile learning, and social learning. E-Learning and virtual education may become an essential component of the higher education system in the next years. Accordingly, teaching staff had to adapt their teaching methodology and tools to eLearning tools and platforms for effective student engagement. This paper reports on a first study conducted from December 2020 to January 2021, involving one hundred Higher Schools teachers of Management in the Silesia Region.The study showed many serious problems related to the emergency teaching-learning experience since it was essentially based on the translation of face-to-face approach in the online environment.
RESEARCH OF APPROACHES TO CONSTRUCTING PREDICTIVE MODELS OF THE SPREAD OF VIRAL DISEASES
Authors: Samarkin Alex , Bruttan Iuliia , Ivanova Natalya , Antonov Igor , Bruttan Maria
Published: June 2021

The article is devoted to the analysis of the available mathematical models in epidemiology and the possibility of their modification. We note that the situation with the COVID-19 virus pandemic is characterized by several features not comprehensively studied in the existing models. For a rational response to existing challenges, it is necessary to have a predictive and analytical apparatus in the complex (national and regional scale) mathematical models with a planning horizon of 2 years (the expected period of mass production of vaccines). The article discusses the existing approaches to predicting the spread of the COVID-19 virus in Russia based on mathematical models of epidemics. The possibilities and limitations of the proposed approaches are considered. In the conditions of the Russian Federation, transport connectivity at the interregional and intraregional levels plays an important role, and for megalopolises - transport flows within large agglomerations and the age structure of the population. In contrast to previous pandemics and epidemics, public policy plays a significant role. The approach, which consist in building multi-agent models that combine the advantages of compartment models and models based on the Monte Carlo method (individually oriented) is proposed by the authors. It is planned to use compartment models to assess the dynamics of the process and individually-oriented models - at the level of individual territories and districts.
SOFT SKILLS DEVELOPMENT STRATEGIES FOR COMPUTER ENGINEERING AND INFORMATION TECHNOLOGIES UNDERGRADUATE STUDENTS DEVISED IN THE PROCESS OF LEARNING ENGLISH
Authors: Malykhin Oleksandr , Aristova Nataliia , Melikova Susanna
Published: June 2021

The aim of the study was to devise soft skills development strategies for Computer Engineering and Information Technologies undergraduate students in the process of learning English. The research consisted of total 347 Computer Engineering and Information Technologies undergraduate students including 45 female students (13.00%) and 302 male students (87.00%) aged from 17 to 21. The research which was non-experimental in nature was conducted at four higher education institutions in Ukraine between October 2020 and November 2020. To reach the main aim of the study the team of researchers developed a web-based questionnaire containing open-ended and closed-ended questions. The use of the web-based questionnaire seemed to be quite logical for collecting the data necessary for devising soft skills development strategies for Computer Engineering and Information Technologies undergraduate students in the process of learning English taking into account the situation connected with the Covid-19 pandemic. The respondents who volunteered to take part in the survey were sent a link to the web-based questionnaire and guaranteed the complete anonymity. The data analysis covered processing of information collected from the anonymous web-based survey, displaying the data obtained in the form of tables and figures, devising soft skills development strategies based on research results and drawing general conclusions. The findings obtained enabled the authors to present six development strategies aimed at enhancing soft skills among Computer Engineering and Information Technology undergraduate students that could be applied in the process of learning English: a) combination of competence-based, action-oriented and blended-learning approaches in the English for Specific Purposes classroom, b) integration of formal, non-formal and informal learning, c) participation in specially focused network professional communities, d) use of open educational resources for learning English, e) use of open professionally-oriented educational resources, f) introduction of learning-style based activities in the English for Specific Purposes classroom for boosting students’ soft skills.
ON INTEGRATION OF EVOLVING INFRASTRUCTURE TOPOLOGY GRAPHS AND METRIC DATA STREAMS IN INFORMATION TECHNOLOGY INFRASTRUCTURE MANAGEMENT
Authors: Kampars Jānis , Grabis Jānis , Matisons Ralfs , Vindbergs Artjoms
Published: June 2021

Modern cloud-based information technology (IT) infrastructure monitoring context and data are gathered from various systems. Typical monitoring systems provide a set of metrics characterizing the performance and health of a variety of infrastructure components. To understand the dependencies and relations among these measurements, the infrastructure topology can be analysed to provide context to the monitoring metrics. However, the metrics and the topology are updated at different time intervals and providing continuous merging and analysis of both data sets is a challenging task which is rarely addressed in the scientific literature. The paper elaborates a method for integration of infrastructure topology graph and monitoring metric data streams. The method is intended for application in the identification of anomalies in IT infrastructure.
ENTERPRISE MANAGEMENT IN THE CONTEXT OF EXPANDING THE SCOPE OF BLOCKCHAIN TECHNOLOGY
Authors: Verteshev Sergey , Verteshev Anton , Voronov Mikhail
Published: June 2021

The method of creating an automated enterprise management system is considered. The method is based on the ideas of the imitation approach and fuzzy mathematics. Real-time enterprise planning is the goal. The method is relevant in the context of setting up the market for goods and services with the expansion of e-commerce. The model of the formation of the plan of the enterprise for the execution of the orders received is considered.
E-COMMERCE RETAIL CUSTOMERS REPURCHASE FACTORS INFLUENCING IDENTIFICATION
Authors: Peksa Tereze , Pekša Jānis
Published: June 2021

With the fast-paced technological development era and the importance of using the Internet in our daily lives, e-commerce as shopping no longer seems new or unusual. Regardless of type or size, companies are using e-commerce advantage to compete in the market. Each of these companies needs a circle of independent and loyal customers. When the customer is satisfied, he gives positive feedback about the company and makes a repeat purchase. In this way, he attracts new customers to the company and provides an independent income for the company. Certain factors influence the customer's attitude and behavior. It is essential to determine what influences their customers' choices when competing to earn profit in the market; the customer must be satisfied in order for him to want to make a repurchase. Repurchases from customers indicate a loyalty to the company. Customer loyalty can be the result of a company consistently meeting and exceeding its customer expectations. Customer loyalty can have a significant impact on business growth. To assess and identify the factors influencing customer satisfaction, they are identified and offered a conceptual reflection of the current situation and offer a conceptual model of Identification Causes and Effects of Customer Satisfaction Framework (IceCSF) in e-commerce retail.
CHALLENGES OF ADVANCED ANALYTICS MATURITY MODEL DEVELOPMENT
Authors: Lemsa Santa
Published: June 2021

Significance to understand the advanced analytics ecosystem maturity is increasing caused by constantly growing data volumes and demand for advanced analytics including automated decision making based on data or process automation. The analytics maturity assessment helps to identify strengths and weaknesses of the organization’s analytics ecosystem and can provide detailed action plan to move to the next level. The focus of the paper is to review and analyse analytics maturity models to assess their application as frame to build a new analytics maturity model or replicate with time adjustment any of reviewed models. The literature review and publicly available assessment models provided by analytics sector were used to review and analyse analytics maturity models.  Fifteen models were reviewed and four of them analysed by twelve characteristics. Summary of four models includes analytics maturity levels, domains, accessibility of questionnaire, discloser of maturity level detection and authors assessment of several characteristics. Comprehensive descriptions of analytics maturity levels were available for many models. Solid recommendation sets for each maturity level provided for the most disclosed models. One of the most important components, approach to detect specific maturity level, was not transparent or disclosed with limitations. However, it is possible to develop a new model or replicate in some extent based on models reviewed in this paper, but it requires extensive professional experience in advanced analytics and related functions.
STRUCTURAL MANAGEMENT PARADIGM IN THE MODELS OF NETWORK ORGANIZATIONS
Authors: Yudov Alexander , Trofimov Vadim , Andreev Dmitry , Bruttan Iuliia , Verteshev Anton
Published: June 2021

Development problem of network organizations’ modelling methods is considered in this article. It is characterized with two fundamental directions that are the basis of the scientific approach. The authors offer one more aspect of modelling – taking into account the influence on the object’s structure and the produced products of external messages that carry structural rules, i. e. the rules needed for similar objects modelling.
THE ALZHEIMER’S DISEASE IMPACT ON ARTIFICIAL NEURAL NETWORKS
Authors: Zigunovs Maksims
Published: June 2021

The Alzheimer’s Disease main impact on the brain is the memory loss effect. Therefore, in the “neuron world” this makes a disorder of signal impulses and disconnects neurons that causes the neuron death and memory loss. The research main aim is to determine the average loss of signal and develop memory loss prediction models for artificial neuron network. The Izhikevich neural networking model is often used for constructing neuron neural electrical signal modeling. The neuron model signal rhythm and spikes are used as model neuron characteristics for understanding if the system is stable at certain moment and in time. In addition, the electrical signal parameters are used in similar way as they are used in a biological brain. During the research the neural network initial conditions are assumed to be randomly selected in specified the working neuron average sigma I parameters range.
IMPLEMENTATION OF THE DIFFERENCE SCHEME FOR ABSORPTION EQUATION TYPE PROBLEMS APPLYING PARALLEL COMPUTING TECHNOLOGIES
Authors: Zigunovs Maksims
Published: June 2021

This paper describes a way of parallel algorithm technology usage for analyzing physical processes parabolic differential problems on the surface. This analysis determine the temperature distribution on the surface. Such analysis can fit calculation of Maxwell and Maxwell-Stokes equations and can be focused on mathematical models that can be reduced to the absorption or diffusion-convection-reaction equations with the initial and boundary conditions of different order (1st, 2nd, 3rd order of boundary conditions). Parallel computing technologies usage provides an acceleration possibilities of mentioned calculations in different way and effect depending of parallel technology type and method combinations used during the calculations.
FORMATION OF COMPETENCIES OF SPECIALISTS IN THE FIELD OF WELDING THROUGH THE POSSIBILITIES OF DISTANCE ONLINE TRAINING
Authors: Tasheva Еlisaveta , Manilova Marina
Published: June 2021

Today the new challenges in the world assign a key role to the distance online education in the formation of knowledge and competencies. The development of Internet technologies provides opportunities for much better distance online education. The use of various digital platforms increases the efficiency and improves the way of delivering information to the students. Different types of multimedia applications improve the perception of the learning material. The subject of this report is the development of a methodology for distance online training of welding specialists at the Institute of Metal Science, Equipment and Technologies with Hydro- and Aerodynamics Centre "Acad. A. Balevski" at BAS.
THEORETICAL AND PRACTICAL FOUNDATIONS OF THE APPLICATION AND USE OF THE TELEMATICS SOLUTIONS FOR THE DEVELOPMENT OF THE NATIONAL ECONOMY
Authors: Sarvari Renata , Zenkova Inga , Znotina Daina
Published: June 2021

The authors’ research is interconnected with the socio-economic policy of the Republic of Belarus. Structural components and metrics of economic efficiency in the scientific work are studied based on government demand, which is reflected in the National Strategies for Sustainable Socio-Economic Development of the Republic of Belarus until 2020 and 2030. In addition, statistical data on the activities in economic sectors allows us to identify the most vulnerable areas of business, where telematics solutions can be used as drivers of growth and development. Considering that in the Republic of Belarus there are no fundamental studies on the application of business solutions based on the telematics tools for socio-economic development, the relevance, and reasonableness of the study is subsequently substantiated by economic results obtained from the analysis of the implementation of telematics solutions in foreign practice and in Belarusian business, that’s reflecting significant savings and cost reduction.
MODIFICATION OF THE MINIMAL BERGMAN MODEL OF THE "INSULIN-GLUCOSE" SYSTEM AND ITS IMPLEMENTATION IN MATLAB/SIMULINK
Authors: Belov Vladimir , Procofiev Mark , Komandresova Tatyana , Samarkin Alexander
Published: June 2021

The article discusses a modification of Bergman's minimal mathematical model of the "insulin-glucose" system, which allows simulating controlled exogenous sources of glucose and insulin into the patient's blood on the model and investigating the dynamics of changes in their concentrations in normal conditions, in type I DM and type II DM. A modeling scheme is presented in graphic notations of the MatLab / Simulink computer mathematics system and a number of computational experiments on it are described to determine the type of glycemic profiles of glucose and insulin concentration in the patient's blood in the noted situations. The fundamental possibility of using model mappings in the MatLab/Simulink environment for the study and tuning of the loop for automatic regulation of the "insulin-glucose" balance in the patient's blood using a controlled insulin pump is demonstrated. It was also found that the modified minimal model can be customized for a specific patient with diabetes, which makes it possible to use it to solve the problems of individual prediction of the development of a diabetic disease in a specific patient. In addition, the described model makes it possible to recreate and virtually investigate various conditions and cases on it that affect the dynamics of insulin and glucose concentrations in the patient's blood, for example, when he performs physically stressed activities, in the presence of the effects of “aging” of insulin-producing cells in the pancreas. iron, etc.
AUTOMATED SENSORY MONITORING SYSTEM PROTOTYPE FOR CONTINUOUS MONITORING OF MATERIAL AND STRUCTURE STATE
Authors: Hauka Maris , Pavelko Vitālijs , Blumbergs Ilmars , Kubulins Raivis
Published: June 2021

The goal of this article is to solve problems of automated monitoring systems of industrial and aviation constructions. Based on the latest research results, the most cost-effective solutions are covered, and a practical solution is offered. This article is part of the scientific project “Development of an integrated sensor system for material and structure monitoring”. The article describes the problem and suggests a practical solution for an integrated sensor system for material and structure monitoring prototype.
HIGH RIGIDITY AND VIBRATION ENDURANCE BAR FOR DEEP HOLES
Authors: Evgenieva Evgenia , Nikiforov Igor , Maltsev Pavel , Dmitriev Sergey
Published: June 2021

Different constructions of bars are analyzed in the article, all of which are based on the idea of creating prestressed state in material. Improved construction of bar is proposed for equable spreading of elasticity zone along axis of boring bar.
TECHNOLOGICAL OPTIMIZATION OF POSITIONING PRISMATIC-BODY DETAILS IN HOLDING DEVICES
Authors: Lengerov Angel
Published: June 2021

The aim of the present work is to propose and substantiate a scheme of a device for positioning prismatic-body details on two holes with parallel axes and a plane, perpendicular to them. This will help to achieve high accuracy of linear and angular orientation of the workpiece. Thus the requirements for the accuracy of the center-to-center distance of the base holes will be reduced and the process of assembling the workpiece to the grip pawls will be simplified.
SYNTHESIS OF THE LOW-FREQUENCY VIBRATION EXCITER
Authors: Fedorov Dmitry , Khitrov Andrey , Veselkov Evgeny , Domracheva Yuliya , Kozyreva Oksana
Published: June 2021

The article is devoted to synthesis of the low-frequency vibration exciter for checking of sensors of acceleration. In many areas of the modern equipment sensors of acceleration working in very low range of frequencies are widely used. For checking and graduation of such sensors the vibration exciter capable to provide rectilinear horizontal harmonic oscillations of the calibrated accelerometer in so low range of frequencies are required. Low frequencies of fluctuations cause the necessity of creation of big amplitudes of movements for ensuring the acceptable values of amplitudes of accelerations. The low-frequency electrodynamic vibration exciter with a magnetic suspension of mobile part which is a component of the National Standard of the vibration movement of the Russian Federation is so far created. However, development of the modern equipment demands expansion of frequency ranges to the area of ultralow frequencies. One of requirements shown to the vibration exciter working in the ultralow range of frequencies is increase in amplitude of horizontal movements of a mobile part as with small amplitudes the speed and acceleration of the harmonious law of the movements proportional according to the frequency of fluctuations and a square of this frequency, will have small amplitude values. One of problems of realization of a control system of the electric drive of the vibration exciter consists in that a mobile part possesses indifferent position of balance. The centre of fluctuations of a mobile part is not defined and can be in any point on magnetic conductor length. That fluctuations had the steady centre in an average point of a magnetic conductor without use of a mechanical spring, the drive is supplied with an additional control system of fluctuations, or a so-called electromagnetic spring.
INCREASING THE EFFECIENCY OF LASER MARKING OFALUMINUM ALLOYS BY DOUBLE WRITING OF THE SYMBOLS
Authors: Atanasov Atanas , Lengerov Angel
Published: June 2021

A comparison is made between samples marked by writing letters and symbols once, with these marked by twice but writing with two times greater velocity. As a consequence of the sharp decreasing of the main characteristic of the material –its reflective index, in the second case we received an enhancement of the effectiveness of the laser marking, decreasing energy use at the same time. Experimental studies have been carried out with a CuBr (copper bromide vapour) laser for specific mechanical engineering details.
INVESTIGATION OF THE INFLUENCE OF DIFFERENT MODIFIERS ON THE EUTECTIC SI IN THE COMPOSITION OF ALSI18 ALLOY
Authors: Panov Ivan , Dochev Boyan , Manolov Valentin , Velikov Angel , Dyakova Vanya
Published: June 2021

The structure of hypereutectic aluminum-silicon alloys consists of primary silicon crystals arranged in a eutectic matrix. In the present work the influence of different types of modifiers on the size and shape of the silicon crystals in the composition of the eutectic of the AlSi18 alloy has been studied. The classic for this type of alloys modifier (phosphorus), as well as the nanomodifiers SiC and nanodiamonds (ND) have been used. The results of the microstructural analysis show that the three modifiers used affect differently the shape and size of the eutectic silicon of the investigated alloy.