bluuebunny/crossref_metadata_2025 huggingface dataset:
Possibility of using of textile fibers waste in the production of wood composite materials
Authors: Bryn O.I.
Published: March 2024

Wood composite materials (WCM) are one of the most common materials for the needs of the furniture industry, construction, aircraft, ship and wagon construction. The raw material for the manufacture of WCM is wood. Due to the annual increase in demand for wood raw materials and sparsely forested territory of Ukraine, we have a question about expanding the raw material base. The textile industry is working and developing intensively in Ukraine. Much of the textile waste is not widely used in practice. Most textile waste is thrown out, which requires additional material costs for garbage removal. In addition, textiles are an integral part of solid waste, which is not sorted and goes to landfills. That has negatively affects the environmental situation. Therefore, the question arose about the manufacture of DCM with partial replacement of wood raw materials for textile fibers. Sources of textile fibers are waste from the textile, clothing and knitwear industries, as well as secondary raw materials. The use of textile fibers in the production of WCM requires their previous preparation. Analysis of literature sources showed that it is advisable to use mechanical grinding methods for textile waste (methods of abrasion, impact and division into fiber). The introduction of additional operations in the technological process of manufacturing WCM (particleboard, fiberboard, OSB) with textile fibers is analyzed. The addition of textile fiber waste to various types of composite materials leads to the deterioration of physical and mechanical properties. However, some materials meet the requirements of the standard with minor replacement of wood particles by textile waste. But even such a small saving of wood resources is significant in volumes of production.
The influence of different parameters of stability of production sites on the efficiency of functioning of woodworking production
Authors: Orikhovskyy R.Ya. , Gayda S.V.
Published: March 2024

The article describes the study of the influence of the stability of production sites on the efficiency of automatic woodworking production lines. A new method of analytical calculation of equivalent stability parameters for multi-part production systems of sequential layout is proposed. With the help of analytical and simulation models of automated production systems of different productivity, the influence of equipment stability on system productivity is investigated. Improving the productivity of production systems is carried out through the optimal layout of equipment and structural and parametric optimization.    The aim of the study is to determine the impact of the stability of technological equipment on the performance of automated production systems in terms of random effects on the technological process. It is too difficult for stochastic production systems to investigate the process. It is very difficult to establish analytical dependences of indicators of technological processes on operating conditions. Such problems can be solved using simulation methods. At the same time, the computer processes simulate the functioning of automated production systems. Investigating the operation of automated production systems in stochastic conditions on simulation models, it is possible to scientifically substantiate the optimal parameters of automated systems in terms of productivity, stability, reliability and cost-effectiveness. As a result, ways to increase the productivity of the production system are established. The layout of automated production systems with modern high-performance machines significantly improves productivity, but is not always economically feasible, because it does not eliminate the influence of stochastic factors on the efficiency of the technological process, but creates more complex stochastic processes. Modern methods for estimating the impact of different values of the stability parameter on the efficiency of automated production systems are incomplete. It is proposed to use analytical solutions and simulation modeling to study production systems.
Biological resistance of Silver fir stemwood in the Ukrainian Carpathian
Authors: Kopolovets Ya.M.
Published: March 2024

Global climate change significantly affects the physiological processes of growth and development of forest ecosystems. At the same time, the ability of a forest ecosystem to maintain its basic function and structure is called its biological resilience, which depends on the resistance of its dominant forest tree species. The research has covered the study of the biological wood resistance in terms of reducing the wood density of Silver fir growing in the Ukrainian Carpathians. Moreover, the main emphasis was paid on the influence of surface mold, wood-staining and wood-destroying fungi on different types of wood density. There were selected nine fir stands placed in the State Enterprise Perechyn Forestry, in which were cut 18 model trees with varying degrees of fungal damages. All qualitative characteristics of Silver fir wood were diagnosed by the European norms of wood quality for round timber. Altogether, 796 wood samples were tested. The onset of wood lesions was defined as the cessation of cambial activity and drying of the crown of the tree as well as diagnosed fungal lesions. Wood samples were selected in accordance with generally accepted wood science methods in term of determining the wood density. As a result, there were indicated significant differences in wood density with different timeframe of fungal damage to wood. The basic density of healthy wood varied from 362 kg·m-3 to 457 kg m-3 with an average value of 392 kg·m-3, and the same figure for wood with significant damage changed from 195 kg·m-3 to 283 kg·m-3 with an average value of 246 kg·m-3. The study showed that a significant difference in the stemwood density of Silver fir should be associated with the biological destruction of the cell wall, in particular, the decay of its main chemical components such as cellulose and lignin, fungi Basidiomycota. As a result of the study of wood density, there were identified four classes of trees by the biological wood resistance taking into account the time damaged: 1. Healthy wood - without signs of biological damage by pests; 2. Wood with initial damage to wood by surface mold within six months; 3. Wood with medium damage by wood-painting and wood-destroying fungi from six months to two years; and 4. Wood with significant damage to wood-destroying fungi for more than two years. According to the impact of fungal lesions on the wood density of Silver fir was estimated: healthy wood - without signs of biological damage by pests; wood with the presence of surface mold for up to six months; wood with average damage by wood-dyeing and wood-destroying fungi from six months to two years; wood with significant damage to wood-destroying fungi for more than two years.
Methods for normalization of the stress state of circular saws
Authors: Rebeznyuk I.T. , Salovskyy S.
Published: March 2024

Abstract. One of the most important tasks of modern woodworking is to increase the efficiency of circular saws by improving the performance of woodcutting tools. The practice of operating circular saws shows that up to 40% of breakdown losses of saws and up to 50 % of defective products are due to insufficient tool performance. Numerous studies have shown that the main cause of the loss of efficiency of circular saws are thermal stresses due to uneven heating of the saw blade.  In modern scientific and industrial practice, a number of methods have been developed and used to compensate for thermal stresses: the classic slip-rolling of a saw blade, its heating or cooling, and so on. Among them is the method of creating compensating slots, as the most effective one and which does not require significant material costs. The shapes and location of compensating slots on the saw blades of the leading companies that manufacture wood cutting tools are analyzed and a new shape of the slots in the form of an Archimedes spiral and their location on the saw blade is proposed. Analysis of ways to normalize the stress state of circular saw blades showed that the simplest and most promising method of normalization is a method of creating slots in the saw blade, which does not require additional costs and is formed by laser during the manufacture of saw blades. The presence of slots in the saw blade reduces the temperature effects, thereby increasing the stability of the flat balance of the saws during sawing. However, the design of the slots is chosen intuitively, and the validity of one or another form of slots is usually proved by experimental methods.
Mathematical model of forecasting volumes of post-consumer wood production
Authors: Gayda S.V. , Lesiv L.E.
Published: March 2024

It is substantiated that a potential source of wood raw materials is various wood waste, in particular, post-consumer wood (PCW). A detailed review and thorough analysis was made to determine the principles of PCW classification at the Ukrainian level. The classification of PCW by degree of pollution into four groups is proposed. A method of calculating the used wood has been developed, which makes it possible to calculate its quantity effectively and reliably. A mathematical model for calculating the potential and balance of PCW by origin is proposed. It was established that the weighted average annual percentage of PCW from the trade network ranges from 14-16%, construction - 20-24%, raw materials and woodworking industries - 6-10%, used (old) furniture products - 10-16%, municipal waste - 16-18%, solid waste – 16-22%, other revenues – 6-8%. On the basis of statistical data from 2015 to 2023, approximating power dependences for each total indicator were obtained, which make it possible to forecast the volume of PCW formation in the near future, in particular until 2024. The implementation of the developed mathematical model makes it possible to effectively forecast the distribution of PCW by categories that determine the degree of pollution and, accordingly, the percentage of material processing of PCW. It is estimated that the potential of PCW in Ukraine in 2023 was about 1.783 million tons. It is justified that the improvement of PCW management at all levels should be based on general technical, economic and environmental standards and focus on the following proposals: analysis of PCW management; calculation of the potential of PCW as a secondary raw material and energy source; improvement of databases on technical, economic, environmental and statistical information; implementation of new approaches to PCW management, taking into account already existing schemes. A strategy for the material use of PCW was developed, which is based on the assessment of potential volumes of PCW according to a mathematical model, systematization of PCW by categories, classification by pollution, the concept of utilization of PCW by processing into dimensionally suitable blanks and construction materials, in particular, carpentry plates of various structures with predicted characteristics, which take into account the physical and mechanical properties of this additional wood resource.
Determination of the influence of pressing parameters on the bending process of beech furniture blankets
Authors: Grytsak S.A. , Grytsak S.S.
Published: March 2024

It is substantiated that the technology of cold bending of pre-pressed blanks has a perspective. It was established that the minimum bending radius depends on the direction of pressing and the degree of pressing. It was determined that pressing in the radial and tangential directions does not give the desired effect during bending, which is evidenced by a large number of defects (respectively 47-67% and 34-61%) associated with the specific structure of the wood. In particular, during pressing, the wood cells are deformed along the pressing line, and during subsequent bending, the elongation of the wood in the peripheral part passes across the pressing line and is only partially compensated by the pressed cell walls. It was experimentally established that the results are significantly different when the workpieces are axially pressed. When the degree of pressing is increased from 15 to 25%, the number of high-quality blanks increases and amounts to 83-97%, respectively. This can be explained by the fact that during axial pressing, wood cells are deformed along the line of pressing. During subsequent bending, the elongation of the wood in the peripheral part also takes place along the line of pressing and is compensated to a much greater extent by the pressed cell walls. It was found that when the workpieces are pressed along the axis, uneven pressing along the length occurs, that is, only approximately half of the length of the workpiece is pressed. This is probably the main reason for the defect. Additional research and possibly new technological solutions are needed to solve the problem of uneven pressing during axial pressing. Prospective directions of research into bending processes of beech furniture blanks have been formed, in particular from the development of new bending technologies; optimization of pressing parameters; modeling of bending processes; study of the influence of humidity and temperature; study of the strength and durability of bent blanks.
Analysis of the efficiency of structural and technological solutions in the production of component units of lattice furniture products
Authors: Grytsak S.A. , Gayda S.V. , Kushpit A.S. , Salapak L.V.
Published: March 2024

The existing types of backs of carpentry chairs, which are part of a kitchen set of furniture, which are constructed from elements of hard wood species, in particular oak, and the technological processes of their manufacture have been analyzed. The technologies and production processes accompanying the creation of the backs of carpentry chairs are analyzed and described in detail. The methodology of research and comparison of technological processes of manufacturing the backs of carpentry chairs with structural features are substantiated. The necessary materials for two types of manufacturing backs of carpentry chairs from oak wood from natural wood were selected and calculated. The necessary basic equipment was selected and calculated according to the developed manufacturing technologies for two options for the manufacture of chair backs. The necessary technological routes for each variant of manufacturing the backs of carpentry chairs were selected, developed and calculated. Two shop plans are proposed according to the developed technologies for manufacturing the backs of carpentry chairs. A comparison of the amount of equipment loading of each variant of manufacturing the backs of carpentry chairs was carried out. The results of the preliminary analysis based on the data of three indicators (cost and capacity of the equipment, number of employees) gave the right to recommend the second option for the manufacture of the backs of carpentry chairs, which are included in the set of kitchen furniture, which is constructed from prepared elements of solid species of wood, in particular oak from natural wood, where the cost of equipment is the lowest and amounts to UAH 827.65 thousand, the number of employees is 8, the total power is 15.27 kW. On the other hand, the cost of materials for the first option is much higher than in the second. Economic calculations proved and calculated that the least expensive for the implementation of the annual program in the amount of 30,000 backs of carpentry chairs, which are included in the set of kitchen furniture, which is constructed from prepared elements from hard species of wood, in particular, oak from natural wood, is the second option, where the investments amounted to UAH 14,252.98 thousand, which is 20% less than in the first option.
Determination of the strength indicators of normal blockboard made of post-consumer wood
Authors: Medvid L.M. , Gayda S.V.
Published: March 2024

Reasonably, wood resources should be used comprehensively, in particular, this applies to wood waste and residues at all stages of production. But today, as never before, according to the principles of the circular economy, the issue of processing post-consumer wood (PCW) has arisen - an additional reserve of wood that has already lost its consumer characteristics in products, and its disposal minimizes the negative impact on the environment. A batch of PCW-made blockboard was made by implementing the B-plan of the second order, where the variables were the width of the rails of tangential and radial sawing. The limits of strength during static bending and during chipping for PCW-made blockboard spruce wood were experimentally determined and two adequate regression models were built depending on the alternate laying of radial (Brad) and tangential (Btan) rails with widths of 30, 50 and 70 mm at a thickness of 22 mm . It was established that the width of the rails in the construction of carpentry boards significantly affects the strength characteristics of the structure. It was found that an increase in width from 30 to 70 mm during the determination of the strength limit in static bending leads to a decrease in the indicator for radial rails by 15-20%, and for tangential rails - by 33-38%; and during the determination of the limit of rocking strength, it leads to an increase of 15-17% for radial rails, and a decrease of 12-14% for tangential rails. It was established that the strength limit during static bending of all PCW-made blockboard spruce, regardless of their design, meets the requirements of DSTU13715:1978. The limit of strength during chipping for most of the samples of experimental boards also meets the regulatory requirements, except for one, when laying rails with a width of 70 mm. According to the results of experimental studies, it was established that the maximum value of the strength limit during static bending σu = 35.705 MPa can be obtained by fixing the dimensional parameters of the width of the rails PCW-made blockboard from spruce of combined stacking: Brad (x1) = 30 mm Btan (x2) = 30 mm. It was established that the maximum value of the strength limit during chipping τsk = 1.961 MPa, taken as an absolute value, can be obtained by fixing the dimensional parameters of the width of the slats of carpentry boards made of PCW from spruce combined stacking and veneered with plywood: Brad (x1) = 70 mm; Btan (x2) = 48 mm. It is recommended to use post-consumer wood for the production of blockboard with a cross-section of rails in a ratio no larger than 1:4 with a combined arrangement of radial and tangential ones.
Registro de ocorrência de incêndio (ROI): evolução, desafios e recomendações
Authors: César Bontempo Gínia , Souza Lima Gumercindo , Assunção Ribeiro Guido , Doula Sheila Maria , Gonçalves Jacovine Laércio Antônio
Published: March 2024

Um dos principais desafios das Unidades de Conservação (UCs) brasileiras é reduzir a ocorrência de incêndios florestais em suas áreas. Uma das estratégias usadas para isso tem sido o preenchimento do Registro de Ocorrência de Incêndio (ROI), que permite conhecer o perfil dos incêndios florestais e planejar a sua prevenção e combate. Entretanto, muitas das unidades não apresentam tais registros. Esta pesquisa teve como objetivos resgatar o histórico de criação e evolução do ROI, avaliar sua aplicabilidade e fornecer subsídios para seu melhor preenchimento e utilização por parte das UCs. Os métodos utilizados para isso foram a pesquisa bibliográfica e documental e a pesquisa de campo com aplicação de entrevista e observação não participante. A avaliação da aplicabilidade do ROI aconteceu no Parque Nacional do Caparaó, localizado nos estados de Minas Gerais e Espírito Santo. Verificou-se que o ROI é o único registro sistematizado das ocorrências de incêndios florestais em UCs no Brasil e que ele é instrumento importante para a elaboração de estratégias regionais e nacionais para a prevenção e minimização dos incêndios. Sua constante evolução tem contribuído para a melhoria quantitativa e qualitativa dos dados disponíveis. Foram listadas 23 diferentes habilidades e competências relacionadas aos mais diversos campos das ciências naturais e sociais e 16 diferentes instrumentos e equipamentos para a obtenção correta e completa dos dados solicitados no ROI. É possível obter as informações solicitadas no ROI, desde que haja recursos humanos, capacitação e equipamentos para tal.Â
O que perdemos com a passagem do fogo pelos campos de altitude do estado do Rio de Janeiro?
Authors: Aximoff Izar
Published: March 2024

A presença do fogo nos campos de altitude do estado do Rio de Janeiro e as espécies ameaçadas de extinção presentes neste ecossistema foram estudados. O regime do fogo é apresentado associado Ã s áreas e componentes de fauna e flora atingidos. Foram também analisados os registros dos agentes causadores e as causas, o quantitativo de bombeiros e brigadistas, os gastos e demais informações sobre o combate. Em especial, são apresentadas informações sobre o fogo nos campos de altitude do Parque Nacional do Itatiaia e também das espécies ameaçadas que existem nesta Unidade de Conservação. Os resultados apontam que cerca de 15% do total de ocorrências de incêndio nas UC do estado (841 incêndios desde a criação das UC até o momento) foram em áreas acima de 1600m de altitude. Mais de 70% dos incêndios foram nos campos de altitude do Parque Nacional do Itatiaia. Nesta UC existem 35 espécies classificadas a nível nacional como ameaçadas de extinção e que só existem em Itatiaia. Este valor corresponde a 30% das espécies ameaçadas com ocorrência para os campos de altitude do estado. Algumas espécies ameaçadas e não tolerantes ao fogo estão com populações reduzidas por conta do impacto deste distúrbio, causado quase que totalmente pelo homem, responsável por 97% dos incêndios com agente causador conhecido. Apenas 0,5% das ocorrências são tidas como de origens naturais. Os impactos do fogo sobre a biota ameaçada de extinção e que não tolera o fogo não pode continuar.Â
Cuestiones sobre religión, estado y espacios públicos. Un breve recorrido por el libro Poder, Religión y Secularidad de Polo Santillán & Mora Zavala (2023).
Authors: Valverde-Rodríguez Wilmer Edwin , Contreras-Molina María Isabel , Campos-Velezmoro Cynthia Melina
Published: March 2024

El libro Poder, Religión y Secularidad (2023) de Polo Santillán & Mora Zavala (Eds.), es un importante esfuerzo por actualizar los razonamientos y el conocimiento sobre la religión en un contexto global de hiperconexión, revitalización confesional y enmascarado nihilismo. Esta obra se compone de cuatro partes que abordan temas candentes del momento: secularidad, laicidad, modernidad, nihilismo, filosofía, política y su relación con la religión. Cada capítulo contiene artículos que desarrollan estos conceptos y temas desde novedosas perspectivas teóricas y filosóficas.
Comparison of Efficacy of Amoxicillin/Clavulanate Potassium and Azithromycin Sequential Therapies on Nutritional Status of Children with Bronchopneumonia
Authors: Wang Guilian
Published: March 2024

Bronchopneumonia is a highly prevalent respiratory disease among malnourished children and infants, and it is mainly treated with antibiotics. Herein, we compared the efficacy of amoxicillin/clavulanate potassium and azithromycin sequential therapies for bronchopneumonia. We found that amoxicillin/clavulanate potassium had improved clinical efficacy and accelerated rehabilitation in patients with bronchopneumonia. Azithromycin demonstrated superior efficacy in inhibiting inflammation, enhancing nutritional status, and regulating trace element levels. The therapeutic safety profile of the two sequential therapies was broadly consistent. In the treatment of bronchopneumonia, azithromycin and amoxicillin/clavulanate potassium have their advantages and disadvantages. Therefore, the drug selection for children should be based on their specific conditions.
Applications of Gegenbauer Polynomials to a Certain Subclass of p-Valent Functions
Authors: Al-Rawashdeh Waleed
Published: March 2024

The paper presents a subclass of p-valent functions defined by the means of Gegenbauer Polynomials in the open unit disk D. We investigate the properties of this new class and provide estimations for the modulus of the coefficients ap+1 and ap+2, where p ∈ N, for functions belong to this subclass. Moreover, we examine the classical Fekete-Szego inequality for functions f belong to the presenting subclass.
ON SUB-DEFECT OF HADAMARD PRODUCT OF DOUBLY SUBSTOCHASTIC MATRICES
Authors: Choi E. , Chao B. , Choi I. , Chung A. , Mermigas A. , Shah R.
Published: March 2024

The \emph{sub-defect} of $A$, defined as $\mathrm{sd}(A) = \lceil n - \mbox{sum}(A) \rceil,$ is the minimum number of rows and columns required to be added to transform a doubly substochastic matrix into a doubly stochastic matrix. Here, $n$ is the size of $A$ and $\mbox{sum}(A)$ is the sum of all entries of matrix $A.$ In this paper, we show that for arbitrary doubly substochastic matrices $A$ and $B$, the Hadamard product $A \circ B$ is also a doubly substochastic matrix, and $ \max \{sd(A),sd(B)\}\leq sd(A \circ B) \leq \max\{n, sd(A)+sd(B)\}. $
Suojelupoliisin poliittinen kontrolli ja julkisuus 1969–1982
Authors: Pesu Jukka
Published: March 2024

Artikkeli käsittelee suojelupoliisin poliittista kontrollia ja julkisuutta vuosina 1969–1982. Aikajakson alkupäätä on kuvailtu suojelupoliisin historiassa suojelupoliisin kriisiksi ja loppupäässä tapahtui suojelupoliisin toiminnassa tärkeä ennaltaehkäisevän turvallisuustyön omaksuminen. Yhtenä johtopäätöksenä on, että hyvin epäilyttävänä nähty suojelupoliisi joutui miettimään uudelleen suhtautumistaan julkisuuteen ja valtionhallintoon 1970- ja 80-luvuilla. Tänä aikana tapahtuneet muutokset olivat avainasemassa suojelupoliisin kehittämisessä ja tulevassa kehityksessä. Yhteiskuntasuhteita ei kuitenkaan hoidettu yleistä informaatiota ja tiedotusta lisäämällä, vaan päinvastoin tiedon ja tiedottamisen entistä tarkemmalla rajaamisella ja suuntaamisella sen kannalta ensiarvoisille valtionhallinnon toimijoille sekä ennen kaikkea henkilökohtaisten suhdeverkostojen avulla. Artikkelissa todetaan, että suojelupoliisin suhde erityisesti SDP:hen ja toisaalta myös presidenttiin olivat avainasemassa suojelupoliisia kohtaan tunnetun luottamuksen kasvussa, joka näkyi 1980-luvun mittaan tapahtuneissa uudistuksissa. Aihetta käsitellään suojelupoliisin, eduskunnan, SDP:n ja lehdistön kautta.
The article deals with the political control and publicity of the Finnish Security Police (Suojelupoliisi, Supo) between 1969 and 1982. The early part of the period is described in Supo's history as a crisis, while the latter part of the period saw the introduction of preventive security work, which was important in Supo's activities. One conclusion is that the dubious view of the Supo forced it to rethink its approach to the public and the government in the 1970s and 1980s. The changes that took place during this period were key to its future development. However, public relations was not managed by increasing general information and communication but, on the contrary, by more precisely limiting and targeting information and communication to key actors in the state administration and, above all, through personal networks of contacts. The article concludes that the relationship between the Supo, the Social Democratic Party (SDP) and the President played a key role in the growth of confidence in the Supo, which was reflected in the reforms of the 1980s. The issue is discussed from the perspective of the Supo, Parliament, the SDP and the press.
A method for predicting bank customer churn based on an ensemble machine learning model
Authors:   Branch of the National Research University “MPEI” in Smolensk, Puchkov Andrey Yu. , Dli Maxim I. ,   Branch of the National Research University “MPEI” in Smolensk, Smolensk; Synergy University, Vasilkova Maria A. ,   Branch of the National Research University “MPEI” in Smolensk, Prokimnov Nikolay N. ,   Synergy University
Published: March 2024

The results of research are presented, the purpose of which was to develop a method for predicting the outflow of clients of a commercial bank based on the use of machine learning models (including deep artificial neural networks) for processing client data, as well as the creation of software tools that implement this method. The object of the study is a commercial bank, and the subject of the study is its activities in the B2C segment, which includes commercial interaction between businesses and individuals. The relevance of the chosen area of research is determined by the increased activity of banks in the field of introducing digital services to reduce non-operating costs associated, in particular, with retaining clients, since the costs of attracting new ones are much higher than maintaining existing clients. The scientific novelty of the research results is the developed method for predicting the outflow of commercial bank clients, as well as the algorithm underlying the software that implements the proposed method. The proposed ensemble forecasting model is based on three classification algorithms: k-means, random forest and multilayer perceptron. To aggregate the outputs of individual models, it is proposed to use a learning tree of fuzzy inference systems of the Mamdani type. Training of the ensemble model is carried out in two stages: first, the listed three classifiers are trained, and then, based on the data obtained from their outputs, a tree of fuzzy inference systems is trained. The ensemble model in the proposed method implements a static version of the forecast, the results of which are used in a dynamic forecast performed in two versions – based on the recurrent least squares method and based on a convolutional neural network. Model experiments carried out on a synthetic dataset taken from the Kaggle website showed that the ensemble model has a higher quality of binary classification than each model individually.
Modeling of the operation features of remote protection of backup transformers for the own needs of power units of a nuclear power plant during self-start of powerful motor loads
Authors:   Branch of the National Research University ", Rozhkov Vyacheslav V. ,   MPEI",   in Smolensk, Krutikov Kirill K. ,   Branch of the National Research University "MPEI" in Smolensk, Butrimov Sergey G. ,   Branch of the Rosenergoatom Concern Joint-Stock Company Smolensk Nuclear Power Plant, Sokolov Andrey M. ,   National Research University “MPEI”
Published: March 2024

In the article, using computer modeling, an analysis of the operation of distance protection of backup transformers is carried out, providing alternative power supply for the own needs of a nuclear power plant through a backup busbar when disconnected from the power system. During the transition from the main network to the backup network, there is a short period of power off to the sections. At the same time, the powerful motor loads of the sections that have received power begin to operate in the freewheel braking mode. Then the reserve is automatically switched on, which can occur at a more or less favorable moment. At an unfavorable moment, self-starting may be electrically more severe than a short circuit on the busbar. When combining a new network from a backup auxiliary transformer and an autonomous circuit of running machines, transient processes of electromagnetic interaction between machines switching to generator mode and the new network arise. There are some optimal favorable moments for merging networks when it is advisable to carry out self-starting. Due to the complexity of the mathematical description with a high order system of equations and a large number of interaction objects, it is advisable to study these processes using computer modeling. A practical question, which is answered by the calculations and computer modeling, concerns the value of the distance protection setting for the backup transformer for auxiliary needs. Using the developed structural simulation model in MatLab, a series of experiments was carried out on the run-down and self-starting of auxiliary sections with their given composition and load. The range of self-start time corresponded to the operation of automatic switching on of the reserve sections by distance protection. Calculations and modeling show that the adopted setting can be adjusted, ensuring protection of a larger length of the busbar with possible options for connecting auxiliary sections to it. The model is supplemented with an add-on in the form of an external program for detailed processing and visualization of data obtained from oscilloscopes of the MatLab structural model.
Improving Approaches to Organizing Competitive Intelligence Activities
Authors:   Synergy University, Stenin Artemy A. ,   Hyundai Motor CIS, LLC
Published: March 2024

The relevance of the study lies in the need to implement competitive intelligence processes in an organization in view of the constantly growing level of competition in order to ensure economic stability. Currently, in the scientific literature, there are no clear recommendations for organizing these processes, and the proposed models of traditional organizational structures have a number of disadvantages. At the same time, it is important to remove a large number of factors that influence the decision to create a full-time competitive intelligence unit, such as company size, financial capabilities and the level of industry competition. The purpose of the study is to characterize existing models of organizing processes for conducting competitive intelligence and propose our own approach to the implementation of these processes. The main task is to develop a model for organizing competitive intelligence activities. The article pays special attention to the analysis of the relationship between the frequency of competitive intelligence and the results of the operating activities of organizations, and draws conclusions about the main problems of introducing the practice of conducting competitive intelligence at the present stage. During the study, general scientific methods were used, such as analysis, synthesis, induction and deduction. As a result of the study, information on available approaches to the implementation of competitive intelligence processes is summarized and their characteristics are given, a model for organizing competitive intelligence activities using the scrum method and an automated platform for collecting information about the external and internal environment is proposed.
Strategi Manajemen Acara Festival Sinema Akhir Tahun (SAT) Sebagai Jalur Ekshibisi Film Tahun 2019 - 2021
Authors: Sugawa Oka , Suhada Agung I Putu
Published: March 2024

Sinema Akhir Tahun (SAT) merupakan festival film kampus yang diselenggarakan oleh mahasiswa Prodi Film dan Televisi (FTV) Institut Seni Indonesia (ISI) Surakarta. SAT diselenggarakan sebagai distribusi alternatif, supaya para pembuat film, komunitas independen dan mahasiswa dapat menayangkan karyanya. Penelitian ini berfokus pada analisis manajemen acara SAT pada tahun 2019, 2020, dan 2021. Pemilihan tiga tahun tersebut untuk mengetahui strategi manajemen acara SAT sebelum pandemi, saat pandemi dan setelah pandemi. Penelitian ini menggunakan metode penelitian deskriptif kualitatif. Data dikumpulkan dengan wawancara narasumber kunci, studi dokumentasi berupa arsip dan laporan kegiatan, serta triangulasi sumber data. Analisis data SWOT digunakan untuk mengetahui strategi dan aspek evaluatif pada konsep Management Event Joe Goldblatt yang terdiri dari research, design, planning, coordinating, dan evaluation. Hasil penelitian menunjukkan bahwa penyelenggaraan SAT 2019, 2020, dan 2021 terbukti mampu menjadi embrio festival film mahasiswa di Indonesia yang diinisiasi oleh kampus.
Pelatihan Pemograman Dengan Aplikasi Scratch Untuk Mengenalkan Keterampilan Berpikir Komputasional Bagi Guru-Guru SD di Gugus III Kecamatan Tilatang Kamang
Authors: Satria Erwinsyah , Hendrizal Hendrizal , Daswarman Daswarman , Nora Yulfia , Jusar Ira Rahmayuni
Published: March 2024

Guru SD perlu dilatih untuk bisa menguasai keterampilan abad 21 yang dibutuhkan dalam mengajar siswa SD, diantaranya keterampilan berpikir kritis, kreatif, dan pemograman (ICT). Untuk itu penulis perlu berbagi ilmu pengetahuan pada para guru agar dapat mengenal dan menerapkan keterampilan pemograman dasar untuk bisa berpikir secara komputasional, yang nanti bisa mereka gunakan dalam pembelajaran mereka di kelas. Salah satunya dengan memberikan pelatihan pemograman blok dengan aplikasi Scratch kepada para guru SD di wilayah Gugus III Kecamatan Tilatang Kamang Kabupaten Agam dengan membuat satu proyek pemograman dengan aplikasi Scrath yang bisa digunakan nantinya oleh mereka sebagai salah satu media pembelajaran. Pelatihan yang dilakukan mendapat sambutan yang cukup baik dari para guru yang hadir dan mereka menyatakan aplikasi yang dipraktekkan sangat cocok untuk diterapkan dalam mengajar dan digunakan oleh anak SD serta mereka sangat berminat sekali untuk dapat nantinya menerapkannya pada siswa mereka dalam pembelajaran di kelas masing-masing.

Elementary teachers need to be trained to be able to master the 21st century skills needed in teaching elementary students, including critical thinking, creative, and programming (ICT) skills. For this reason, the authors need to share knowledge with teachers so they can recognize and apply basic programming skills to be able to think computationally, which they can later use in their learning in class. One of them is by providing block programming training with the Scratch application to elementary school teachers in the Cluster III area, Tilatang Kamang District, Agam Regency by creating a programming project with the Scrath application which they can later use as a learning medium. The training that was carried out received a fairly good response from the teachers present and they stated that the applications practiced were very suitable to be applied in teaching and used by elementary school children and they were very interested in being able to later apply them to their students in learning in their respective classes.
The Structural Relationship among Market Orientation, Information Sharing, New Product Development Flexibility, Product Modularization, and Development Performance of Chinese Fast Fashion Companies
Authors:   Academic Society of Global Business Administration, Gao Xinyang , Yin Wenyan
Published: March 2024

This study defines market orientation and strategic information sharing as essential aspects of new product development, and aims to understand how the comprehensive activities of these factors affect the flexibility and performance of new product development. In addition, it aims to address the importance of market orientation and information sharing in rapidly developing and launching new products for companies currently operating in the fashion industry. The results derived from are summarized as follows. First, it proved that market orientation had a statistically significant positive effect on the flexibility of new product development. Second, strategic information sharing had a positive effect on the flexibility of new product development. Third, it was confirmed that the mediating role of product modularization in the 'market orientation→product modularization→new product development flexibility' path was not statistically significant. Fourth, the mediating effect of product modularization in the 'strategic information sharing→product modularization→new product development flexibility' path was statistically significant. It recognized the importance of market orientation and information sharing in the rapid development and launch of new products to companies operating in the Chinese fashion industry, and ultimately provided useful implications for improving new product development performance through modularization of product production.
Da velhice à terceira idade: um estudo exploratório sobre a evolução do conceito e as implicações para as políticas públicas
Authors: Bitencourt Rossandra Oliveira Maciel de , Dalto Fabiano Abranches Silva
Published: March 2024

Este trabalho faz um levantamento teórico acerca da transição do conceito de velhice para terceira idade, analisando a trajetória e as implicações para as políticas públicas voltadas à pessoa idosa no Brasil. Esta pesquisa é de cunho exploratório, uma vez que almeja explicitar categorias teóricas específicas. A técnica empregada neste estudo foi a do levantamento bibliográfico a partir de literatura recente disponível em periódicos científicos. Sabemos que o desafio é assegurar a inserção do idoso na sociedade e nos diferentes espaços da esfera pública com garantias de saúde, renda, segurança e dignidade. Contudo, este trabalho vem ressaltar que as políticas públicas voltadas à pessoa idosa devem ser pensadas no plural, uma vez que esta categoria engloba vários grupos etários em uma única denominação. O que implica assumir a intrínseca heterogeneidade, dadas as diferentes trajetórias imersas na vida social e econômica do país, em cuja diversidade emergem as antigas e novas demandas por políticas públicas.
Uma Alternativa sustentável de mobilidade urbana : o uso de bicicletas e o caso de Niterói (RJ)
Authors: Menezes Thaynara Carinhanha de , Machado Danielle Carusi
Published: March 2024

A bicicleta é um modo de transporte rápido em curtas distâncias, econômico e energeticamente eficiente. Em diversos países, há políticas de incentivo ao uso desta com objetivo de diminuir os efeitos negativos da alta taxa de motorização. O Brasil, nos últimos anos, também tem ido nesta direção, mesmo que lentamente. Este trabalho descreve as atitudes governamentais tomadas em várias localidades do Brasil e do mundo de incentivo à locomoção por bicicleta. Também faz uma revisão da literatura sobre os possíveis efeitos do uso das bicicletas, destacando-se sua importância como uma mudança de paradigma, em que o investimento na mobilidade reflete um caminho para sustentabilidade. O plano de mobilidade por bicicleta em Niterói também é apresentado como uma experiência local.
A Discriminação da mulher negra no mercado de trabalho: uma análise comparativa do rendimento no trabalho de Bahia versus Brasil, nos anos de 2001 e 2015
Authors: Fonseca Edna Silva , Jorge Marco Antonio
Published: March 2024

O objetivo deste artigo assenta-se por investigar a discriminação no mercado de trabalho que afeta sobremaneira a população negra, mais especificamente, as mulheres negras, confrontando seus indicadores com o grupo populacional oposto, homens brancos, além das mulheres brancas e dos homens negros. Toma-se como recorte espacial o estado da Bahia, por se apresentar entre as Unidades da Federação com um quadro demográfico majoritariamente composto por afrodescendentes, contrapondo suas estimativas com a estatística brasileira nos anos de 2001 e 2015, a partir dos microdados da Pesquisa Nacional por Amostra de Domicílios (PNAD). A estratégia empírica engloba a correção do viés de seleção amostral, procedimento proposto por Heckman (1979) no formato cross-section, e por fim, a decomposição do diferencial de salários proposta por Oaxaca (1973) e Blinder (1973). Os resultados indicam, como preconizado pela literatura especializada, a existência de retornos salariais distintos, onde as mulheres negras do estado da Bahia experimentam uma depreciação salarial decorrente, em parte, da dupla discriminação de gênero e cor. As estimativas apontam, nos períodos analisados, a predominância de fatores discriminatórios na Bahia e no Brasil, mas com significativas reduções. Entretanto, esse recuo no efeito não explicado apresenta-se mais expressivo no estado da Bahia, se comparada às estimações realizadas para o conjunto do país.
Análise das redes sociais do Programa Nacional de Alimentação Escolar: aspectos relacionais da aquisição de produtos da agricultura familiar
Authors: Bastian Lillian , Alves Fábio , Silva Sandro Pereira , Valadares Alexandre Arbex
Published: March 2024

Observa-se que os municípios adquirem, em diferentes proporções, os gêneros alimentícios da agricultura familiar destinados à alimentação escolar. As redes sociais do PNAE nos municípios têm sido apontadas como uma das principais explicações da magnitude da introdução dos gêneros dos agricultores familiares nesse mercado institucional. Municípios com boa execução dessa compra, provavelmente, possuem redes sociais mais bem estruturadas, ao contrário de municípios com desempenho insatisfatório. O objetivo aqui é identificar as redes sociais do PNAE em municípios com desempenhos distintos, mas que pertencem às mesmas mesorregiões e possuem características similares quanto à agricultura familiar. A intenção é explicitar possíveis diferenças estruturais nas redes. A abordagem teórico-metodológica utilizada é a da análise de redes sociais, que identifica e interpreta padrões de relações entre atores. Os resultados indicam, entre outros aspectos, que os municípios que incluem em menor proporção os itens da agricultura familiar nas refeições servidas nas escolas exibem envolvimento inferior dos atores das redes sociais nas ações inerentes ao PNAE. Assim, maiores concentrações nas medidas de centralizações e centralidades possivelmente estão associadas com o desempenho mais modesto na aquisição de gêneros alimentícios da agricultura familiar para a alimentação escolar.
Fatores sociais e condições médicas que podem agravar o quadro de pacientes com a Covid-19: evidências para o Brasil em 2020
Authors: Santos Priscila Soares dos , Bezerra Évilly Carine Dias , Dias Lázaro Cézar , Lisbinski Fernanda Cigainski , Coronel Daniel Arruda
Published: March 2024

O objetivo deste trabalho foi o de analisar como os fatores sociodemográficos e as condições de saúde relacionam-se com a evolução dos quadros de infectados com a covid-19 no Brasil. Para isso, por meio de uma pesquisa exploratória quantitativa e utilizando dados secundários obtidos na base de dados do Ministério da Saúde (MS), estimou-se um modelo logit multinomial para verificar a probabilidade de os infectados pela Sars-COV-2 se recuperarem sem o uso de unidade de terapia intensiva (UTI), se recuperarem com o uso de UTI, falecerem sem ter acesso à UTI ou falecerem mesmo fazendo uso da UTI. Foram utilizadas variáveis relacionadas às características pessoais, às condições socioeconômicas e de saúde e à localização geográfica dos pacientes. Os principais resultados apontaram que homens, indivíduos não brancos, menos escolarizados, com comorbidades têm mais chances de desenvolverem casos graves da doença. Chama atenção os resultados encontrados para os povos indígenas, os quais apontam que esses têm chances de falecer sem receber um tratamento intensivo cerca de 128,8% maior que pacientes brancos. Além disso, as chances de desenvolverem casos graves da doença e de receberem um tratamento intensivo divergem de acordo com a região do país em que os indivíduos residem.
Impacto das cotas no desempenho de estudantes no curto e no longo prazo
Authors: Mugnaini Junior Alexandre Nogueira
Published: March 2024

Este trabalho tem o objetivo de estimar o impacto das cotas no desempenho dos estudantes do ensino superior público federal, tanto no curto quanto no longo prazo. São utilizados o pareamento por escore de propensão (propensity score matching – PSM) e o modelo de diferenças em diferenças, ambos aplicados aos dados do Exame Nacional de Desempenho dos Estudantes (Enade) 2017. Os resultados mostraram em geral que estudantes cotistas têm desempenho melhor na nota normalizada do que os não cotistas, revelando um impacto positivo no curto prazo. Ademais, foi possível verificar ainda que estudantes cotistas com pais sem ensino superior têm resultado similar aos demais estudantes, refletindo um impacto intergeracional no longo prazo não significativo. Portanto, as evidências indicam que a política pública adotada pode contribuir para reduzir as desigualdades socioeconômicas, ampliando as oportunidades de acesso ao ensino superior no país.