bluuebunny/crossref_metadata_2025 huggingface dataset:
Aportes del personal científico en la divulgación sanitaria en redes sociales durante la pandemia por COVID-19: estudios de caso latinoamericanos
Authors: Vázquez Espinoza Ana María , Bogantes Retana Andrea , Aedo Andrés , Burton Bárbara , Rosen Cecilia , Manjarrez Peñúñuri Claudia , Parker Gumucio Cristián , Margarit Segura Daisy , Encinas Orozco Francisca Cecilia , Palma Gonzalo , Guillén Ojeda Griselda , González Gómez Jailine , Mena Young Margoth , Maddaleno Matilde , Fonseca Zúñiga Monserrat , Elgueta Rosas Raúl , González López Samuel
Published: May 2024

Esta obra reseña y analiza la divulgación digital en redes sociales de 8 personas científicas de Latinoamérica, provenientes de Argentina, Chile, Costa Rica, y México (4 hombres y 4 mujeres), que durante la pandemia por COVID-19 se convirtieron en líderes de opinión digitales en ámbitos nacionales e internacionales. Estas personas lograron atraer a la ciudadanía y generar lazos de confianza, respondiendo preguntas, re-creando el conocimiento científico, socializando las medidas de prevención y contención para que fueran comprensibles y preocupándose por cada persona usuaria, aun sin conocerla. En ese proceso algunas sufrieron violencia de distintos tipos, vivieron la frustración por el alcance limitado de sus esfuerzos, y aprendieron sobre la exigencia de tiempo que la gestión de un espacio digital requiere. Esperamos que esta iniciativa sea un medio para reconocer y agradecer a todo el personal científico que colaboró en desmentir y aclarar información pública durante la crisis sanitaria por el SARS-CoV-2 y la COVID-19, y que entendió que una población que incorpora la ciencia en su cultura logra entender los procesos de generación de conocimiento, busca y valora las evidencias, y luego actúa en consecuencia, para beneficio individual y colectivo.
Banco de dados para Fontes de conhecimento dos professores-treinadores de voleibol escolar catarinense
Authors: Marcelino Anderson , Tozetto Willen Remon , Isla Alcoser Sandy Dorian , Alencar Allana , Backes Ana Flávia , Mendes José Carlos , Vieira do Nascimento Juarez
Published: May 2024

O estudo analisou as fontes de conhecimentos mais valorizadas por professores-treinadores de voleibol escolar catarinense, considerando a formação acadêmica, a formação federativa, a experiência como atleta e os ciclos de desenvolvimento profissional. Participaram da amostra 52 professores-treinadores de voleibol escolar que atuaram nas etapas estaduais dos Jogos Escolares de Santa Catarina no ano de 2022. Os dados foram coletados por meio do questionário de Perfil de Formação do Treinador, o qual contempla as dimensões da formação acadêmica, da experiência de atleta e da experiência profissional. Os dados foram analisados no software SPSS, versão 20.0, com nível de significância de p≤0,05. Os resultados apontam a maior valorização das fontes de conhecimento provenientes da experiência profissional (42,08±5,79) e formação acadêmica (41,19±6,00) na elaboração do processo de treino. Os professores-treinadores licenciados e/ou bacharéis, com menos tempo de experiência profissional e sem formação federativa, valorizam de maneira significativa as fontes de conhecimentos adquiridas durante as experiências esportivas competitivas como atletas.
Analisis Sistem Antrian pada Pelayanan Customer Service (Studi Kasus: PT Bank BRI Cabang Raha)
Authors: Findayani Sitti Rahmawati , Sani Asrul , Djafar Muh. Kabil
Published: May 2024

The purpose of this study is to find out the queuing model using the structure of the single phase multi-channel queue system in customer service at PT Bank BRI Raha Branch and find out how to complete the queue model on customer service at PT Bank BRI Raha Branch. This research was conducted with direct observation on customer service at Bank BRI Raha Branch. From the data obtained, a steady state test and a Chi-Square kindness test were carried out on arrival patterns and service patterns. Then complete the queuing model using the single phase multi channel queue system structure. The results of the analysis showed that the arrival of customers at Bank BRI Raha Branch was 630 customers with an arrival rate of 2 people per hour and a customer service rate of 5 customers per hour. The queuing system in customer service at Bank BRI Raha Branch follows the queue model which means that the Poisson distributed arrival rate and service time are exponential, the number of channels in the dual system (2 customer service with 1 queue line), the queue discipline used by First Come First Serve (those served are customers who arrive first), the number of incoming customers is not limited or infinite in the queuing system and the population size at the input source is infinite. Busy period opportunities as large as , the average number of customers waiting in the queue is person, the average number of customer in the system is person, the average time spent by a customer waiting is hours, the average time spent in the system including services is hours.
Analisis Model Epidemi Penyebaran Tuberkulosis Dengan Struktur Umur
Authors: Sari Erna , Sani Asrul , Djafar Muh. Kabil
Published: May 2024

Tuberculosis (TBC) is a contagious disease caused by infection with the bacterium Mycobacterium tuberculosis (Mtb), which attacks the lungs. taking into account the laten period of individuals infected with tuberculosis, this study uses the SEIRS model. The total population is grouped into two age groups, group child and group adult . The purpose of this research is to determine SEIRS model of the spread tuberculosis disease with age structure and its completion behavior. The steps in analyzing of the model can be done by determining the equilibrium point, the results are obtained two equilibrium points, namely disease-free equilibrium points and endemic equilibrium points. Determine basic reproduction number and stability analysis at the equilibrium point. Analysis of the stability of the disease-free equilibrium point is carried out to find the stability of the model using linearization around the equilibrium point. The simulation result are disease-free equilibrium point is the asymptotic stable if the basic reproduction number is less than one, and it means that the disease will disappear over time, and the endemic equilibrium point is stable if the basic reproduction number is more than one, meaning there is disease spread in the population.
Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) Untuk Penentuan Dosen Pembimbing Praktik Terbaik
Authors: Muchlis Lita Sari , Lizar Yaslinda , Aini Ulfa Maria , Guci Asriwan
Published: May 2024

This study tries to apply a decision-making method to find best practice work supervisors at a university. This hail is due to the need for evaluation in the implementation of student paractek work. The working principle of TOPSIS is a decision-making technique that has the ability to solve problems based on various criteria. The purpose of this research is to determine the best supervisor using the Similarity to ideal solution (TOPSIS) method. This study has recommended three best lecturers for practical work supervisors, namely: D1 lecturers (0.665590062), D4 lecturers (0.594856811), and D2 (0.478112102), out of ten Practical Work Supervisors who have been assessed, the best three are obtained to be appointed as the best Practical Work Supervisors at UIN Mahmud Yunus Batusangkar.
Perapan Metode Double Exponential Smoothing pada Prediksi Nilai Tukar Petani di Provinsi Sumatra Barat Tahun 2023
Authors: Yulia Rahma , Jannah Miftahul , Syafi'i Mohamad
Published: May 2024

West Sumatra is one of the provinces in Indonesia where the agricultural sector is very important for the regional economy. To encourage the development of the agricultural sector, an appropriate strategy is needed for each location. One of the efforts to encourage the development of the agricultural sector is to pay attention to the availability of agricultural facilities and infrastructure, so that there are no obstacles for producers that increase production costs and harm farmers. The purpose of this study was to determine the model and prediction results of Farmer Exchange Rate in West Sumatra using the Double Exponential Smoothing Method from January 2023 to June 2023. The prediction equation for NTP in West Sumatra Province in 2023 obtained is 〖 F〗_(t+m)=110,5049+(m)0,1773with a value of α = 0.99, β = 0.0115 and MAPE value = 0.99%. The Exchange Rate in West Sumatra from January 2023 to June 2023 tends to increase. The increasing Farmer Exchange Rate in West Sumatra can have a positive impact on the agricultural sector and improve the economic welfare of farmers.
Analisis Sensitivitas dalam Optimalisasi Produksi UD Mekar Sari Karang Klesem Menggunakan Program Linier dengan Metode Simpleks Diperbaiki
Authors: Winarni Ambar , Kartika Dwiani Listya
Published: May 2024

The research aimed to optimize the production of crackers in order to achieve maximum profit at the UD Mekar Sari Karangklesem factory by applying the simplex method. This research used a descriptive quantitative research approach and literature study methods to support the preparation of this research. The data used is secondary data which includes the amount of each raw material needed, the purchase price of each raw material, the selling price of each type of cracker and the yield of each type of cracker produced. UD Mekar Sari is a cracker factory that produces gendar crackers, soto crackers, onion crackers and makaroni crackers. The results of this study indicate that after going through the steps of the simplex method which was improved it was found that an optimum profit of IDR 11,530,000 would be achieved by producing 200 kg of gendar crackers, 80 kg of soto crackers, 100 kg of onion crackers and 80 kg of makaroni crackers . Based on the data on the composition and supply of raw materials for the production of the four types of crackers, data analysis and processing can be carried out by formulating them into a linear program using the improved simplex method. This method is considered more efficient than the improved simplex method. The results of the sensitivity analysis that only limited changes in coefficient value at objective function (the profit each crackers) and the constants right side constraints (the capacity of supply of the raw materials) show that profit remain in optimal condition if the change of coefficient value at objective function and the constants right side constraints between the range being resulted.
Perancangan Job Seeker - Aplikasi Pencari Kerja Menggunakan PHP dan MYSQL
Authors: Kurnia Rahmi Putri , Sy Yulia Jihan , Zalmi Wahyuni Fithratul
Published: May 2024

Job vacancies are information that is really needed by many people with a very fast update rate, because it is related to the acceptance deadline. Speed of information and suitability of abilities are basic criteria in the job search process when applying for jobs. However, the distribution of this information is quite difficult to obtain when you have to look for the source of the information in certain places first. For this reason, a solution is needed to simplify these difficulties. The software development methodology used in the system development process is the waterfall methodology. In this methodology, several steps are taken to build software, namely software engineering, system analysis, system design, system implementation, system testing. By carrying out stages based on the methodology, it is hoped that the application will be built according to needs and can be used by consumers. The Job Seeker Application is an application that can help disseminate job vacancy information for job seekers and employers to assist the job application process directly for job seekers.
Monogénesen öröklődő és szerzett autoinflammatoricus betegségek
Authors: Szekanecz Zoltán , Szamosi Szilvia , Benkő Szilvia , Szűcs Gabriella
Published: May 2024

Az autoinflammatio a természetes (innate) immunitás zavara, mely veleszületett,
monogénes vagy szerzett lehet. A monogénes autoinflammatoricus kórképek közé
tartoznak az inflammasomopathiák, az actinopathiák, az endoplazmatikus reticulum
stresszt okozó mutációk, az NFκB-hez társult betegségek, az interferonopathiák,
az endogén antagonisták génjeinek mutációi és a DADA2. A szerzett
autoinflammatoricus betegségek közé számos gyulladásos reumatológiai kórképet,
bél-, bőr- és csontbetegséget, valamint egyéb kórképeket (például VEXAS,
IgG4-gyel társult betegség, recurrens pericarditis, 2-es típusú diabetes,
interstitialis tüdőbetegség) sorolhatunk. Ebben az
összefoglalóban áttekintjük az autoinflammatio koncepcióját és főbb
mechanizmusait, a legfontosabb monogénes és szerzett autoinflammatoricus
kórképeket, az immundeficientiák autoinflammatióban játszott szerepét, valamint
a szóba jövő terápiás lehetőségeket. Orv Hetil. 2024; 165(18): 683–697.
Increasing the reliability of diagnosis of diabetic retinopathy based on machine learning
Authors: Mamyrbayev Orken , Pavlov Sergii , Karas Oleksandr , Saldan Yosip , Momynzhanova Kymbat , Zhumagulova Sholpan
Published: May 2024

This paper discusses the method of measuring and analyzing the parameters of the retina with subsequent diagnosis based on them of pathological changes due to diabetic retinopathy, which is crucial in the field of medicine to help doctors in timely detection and treatment of the disease. The main problem of biomedical image data analysis is insufficient pre-processing of images for further clear determination of informative indicators. This paper explores the application of machine learning and image processing techniques to develop an effective method for the diagnosis of diabetic retinopathy. The main focus is on obtaining the optimal model using machine learning and different types of neural networks. This paper considered and analyzed such methods of image preprocessing as: median filtering, grayscale conversion, cropping of non-informative areas of the image, selection of contours. The classification results of three rules (Classical Neural Networks (CNNs), Deep Neural Networks (DNNs) and Convolutional Neural Networks (CNNs) were analyzed, and through experimental studies it was determined that the ANN performed the task best (accuracy=87.1 %, reliability=84.6 %, sensitivity=91.6 %, specificity=84 %). An information model was obtained to support decision-making in assessing the condition of the retina using the processing of the obtained microscopic images and further analysis of informative parameters, and a database of more than 35,000 samples and informative features of the retina was formed. Given the sufficient quality of classification and the availability of software and hardware, this method can be developed and applied in practice in medical institutions after conducting all the necessary clinical studies
Application of a data stratification approach in computer medical monitoring systems
Authors: Donets Volodymyr , Shevchenko Dmytro , Holikov Maksym , Strilets Viktoriia , Shmatkov Serhiy
Published: May 2024

The research object is the processes occurring in the data stratification subsystem in the medical monitoring computer system, which is part of the decision support system. Such a subsystem aims to solve data analysis and processing problems in the medical monitoring system. Among them, the problems of anomaly detection, data marking, state determination, selection of the most informative variables, and justification of decision-making are selected for solving.
The paper proposes the structure and implementation of the data stratification subsystem in the decision support system. The subsystem contains modules for anomaly detection and an autoencoder, a clustering module using an advanced multi-agent clustering method, and a state detection module with a modified neural network training procedure.
Modules of the stratification subsystem have been tested using diabetes monitoring data. The results showed that the clustering module provides 25.7 % lower accuracy than the achieved neural network. The accuracy difference is explained by the complexity of the data and the lack of adaptability of the proposed method to solving such problems. It is shown that the method of determining the overall informativeness of variables covers 90 % informativeness with 10 variables, comparable to the variability data. In general, the flexible nature of the proposed stratification subsystem allows for solving the problems.
The proposed stratification subsystem offers a robust solution for improving treatment strategies and decision-making in computer medical monitoring systems. Its versatility allows it to be used in any system where decision support is needed, providing valuable information about informative variables and decision-making features for clinicians and researchers
Identification of the low-rank coals thermal heating behavior
Authors: Mergalimova Almagul , Atyaksheva Alexandra , Sultan Ybray , Nursultan Seitzhapparov
Published: May 2024

In this study, the object of the research is low-rank coal during the process of thermal heating of five types: brown, high moisture brown, long-flame, coke weakly sintering and coke fusinite.
In the research, when conducting thermal and gas analysis in inert media, the problem of using low-rank coal in the thermal heating process to obtain volatile fuel gases was solved by identifying the quantitative and qualitative performance of its behavior. Quantitative indicators are determined as the mass of thermal destruction products: the mass of coal tar and gas products and semi-coke under optimal temperature conditions of their maximum release. Qualitative indicators of coal behavior are components of thermal decomposition products. It is revealed that the behavior of low-rank coals in the process of thermal heating is determined by the degree of metamorphism. In this case, long-flame and brown coals have a lower release of volatile fuel gases than coke weakly sintering and coke fusinite coals due to a lower degree of metamorphism and greater degrees of thermal oxidation and dehydration.
Thermal decomposition component ranges consisting of polyaromatic fragments (HCN, C6H12, C4H5N), greenhouse gases (CH4 and CO2), toxic gases (H2S and NH3) and synthesis gases (CO and H2) have the highest share of release. Optimal temperature conditions and ranges for the release of low molecular weight gases used as high calorific volatile fuel gases are obtained.
The results can be used in the design, optimization and construction of thermal heating equipment, correction of gasification and pyrolysis processes. Moreover, they can be applied in localized coal tar spots minimization technologies and for designing targeted gases extraction
Mutual influence of energy efficiency and innovation activity in the industrial sector of the economy
Authors: Nursapina Khanbibi , Kuangaliyeva Tursynzada , Uryngaliyeva Aizhan , Ibadildin Nurkhat , Serikbayev Serik , Tulegenova Ainagul , Kenzhin Zhaxat
Published: May 2024

The object of the study is energy efficiency and innovation activity of industrial enterprises.
The literature review has shown that the problem of the nature of mutual influence of energy efficiency and innovation activity of the enterprise remains unresolved. The following problem was investigated: existence and nature of dependence of energy efficiency and innovation activity of industrial enterprises. This problem is solved in this study based on the construction of trend lines on the average annual dynamics of changes in energy efficiency, the share of intangible assets and the share of R&D results of large industrial enterprises for 2018–2022. The following results were obtained:
– indicators of the share of intangible assets and R&D results directly affect the energy efficiency indicator;
– the indicator of energy efficiency does not affect the indicator of the share of intangible assets, while it has a direct impact on the indicator of R&D results.
These results explain the priority of the indicator "share of R&D results" in innovation activity for the energy efficiency of enterprises, as it is based on real production. The features of the obtained results consist in the application of comparable correlation analysis coefficients, confirming the existence of a direct relationship between these parameters. The paper provides recommendations on the use of the obtained results at the level of strategic management of an industrial enterprise.
The practical significance of this study is the possibility of applying the findings and recommendations to improve the energy efficiency of industrial enterprises in their innovative development in the scope and conditions corresponding to the developing economy
Determining the influence of mounting angle on the average annual efficiency of fixed solar photovoltaic modules
Authors: Golub Gennadii , Tsyvenkova Nataliya , Nadykto Volodymyr , Marus Oleh , Yaremenko Oksana , Omarov Ivan , Holubenko Anna , Sukmaniuk Olena , Medvedskyi Oleksandr
Published: May 2024

The object of this study is photovoltaic modules with different options for the angle of their installation to the horizon at different geographical latitudes. The scientific problem to solve was determining the dependence of the average annual efficiency of solar photovoltaic modules on the mounting angle of photovoltaic modules and the value of geographical latitude. It has been proven that the efficiency of installation of solar photovoltaic modules can be increased by reducing the angle of their inclination to the horizon depending on the value of the geographical latitude at which they are installed. The average annual efficiency of photovoltaic modules with different mounting angles to the horizon at different geographical latitudes was determined as the annual weighted average value of the cosine of the angle of incidence of solar rays on the plane of the photovoltaic module. The maximum of the average annual efficiency of photovoltaic modules corresponds to a smaller value of the angle of their installation to the horizon than the value of the geographical latitude. So, with a latitude value of 10°, 20°, 30°, 40°, 50°, and 60°, the mounting angle of photovoltaic modules to the horizon will be 9.5°, 18.8°, 28°, 37°, 45.8°, and 54°, respectively. A dependence was derived that allows determining the mounting angle of photovoltaic modules to the horizon dependent on the value of the geographical latitude at which they are installed. A mathematical expression was also constructed that makes it possible to determine the average annual efficiency of photovoltaic modules depending on the angle of their installation to the horizon for different values of geographic latitude.
The results could be used in calculating the average annual efficiency of photovoltaic modules based on the adjusted values of the angle of their installation to the horizon at different geographical latitudes
Improving the thermostatic steam trap characteristics using spring elements with the shape memory effect
Authors: Pylypchak Vitaliy , Epifanov Oleksandr , Patsurkovskyi Pavlo , Shapovalov Yuriy
Published: May 2024

The object of research is the deformation-force characteristics of spring elements of thermostatic steam traps with the shape memory effect.
The research solves the problem related to the imperfection of the design of steam traps controlling elements and their high inertia.
Experimental studies on the impact of the spring force elements cooling rate on the deformation-force characteristics were conducted. Experimental studies showed that the significant impact of the spring force elements cooling rate on the deformation-force characteristics is observed exceptionally under the deformation mode at a temperature t ≤ Мf. Based on the results of the experiments, it was found that decreasing the cooling rate from 66.7 to 0.013 °C/s has a positive effect on the spring element deformation-force characteristics.
Distinctive feature of the work is the study of winding pitch and thermal force cycling impact on the deformation-force characteristics of spring elements. It was found that using thermal force cycling makes it possible to reduce the force required for complete compression of the spring element by 60 %. Intensive decrease in the force required for the complete compression of the spring elements occurs during the first 100 thermal force cycles.
The rational method for spring elements heat treatment has been given. It is based on the next steps: heating to a temperature of 400–500 °C for 1 hour; exposure at this temperature for an hour; cooling with rate 0.013 °C/s, the number of thermal force cycles is at least 100 with a winding pitch of 8·10–3 m. Based on research results, an improved design of thermostatic steam trap with controlling element in the form of cylindrical compression spring made of the VSP-1 alloy based on nitinol has been presented
Improving the method for assessing the capabilities of scientific units in the Armed Forces of Ukraine
Authors: Trystan Andrii , Matiushchenko Olha , Potapov Oleksandr , Tertyshnik Yevgen , Kuznetsov Vladlen
Published: May 2024

The capability assessment process plays a key role in ensuring the effectiveness and readiness of the armed forces to meet national defense objectives. The conditions for the development of the Armed Forces (AF) of Ukraine currently require improvement of the defense planning system, which would allow for effective adaptation to changes in the geopolitical environment. This will improve the efficiency and readiness of the armed forces for modern challenges. As a result, there is a need to objectively compare the level of capabilities acquired by scientific units with the capabilities established in the Unified list (Catalog) of capabilities of the Ministry of Defense of Ukraine, the Armed Forces of Ukraine, and other components of the defense forces. The object of the study is the process of assessing the capabilities of scientific divisions of scientific institutions. The task that was solved is the objectivity of assessment and development of the capabilities of scientific units. Since the capabilities of scientific units are multi-criteria, it is advisable to combine their requirements into functional modules. For each carrier of capabilities, a set of modules is determined by functional directions in accordance with the assigned tasks. The method of assessing the capabilities of scientific units of the Armed Forces of Ukraine has been improved, quantitative assessments of deficiencies in the capabilities of scientific units and recommendations for their elimination have been obtained in accordance with the DOTMLPFI (Doctrine, Organization, Training, Material, Leadership, Personal, Facilities, and Interoperability) methodology. Based on the results of the evaluation, 30 recommendations were formed when defining 10 scenarios. The scope of application of the method is the implementation of scientific and scientific-technical activities, capacity building of scientific divisions of the Armed Forces of Ukraine. The method is the basis for the creation of an automated capability assessment system – an element of the automated system of military management bodies
Construction of a model for evaluating the efficiency of technology transfer process based on a fuzzy logic approach
Authors: Makedon Viacheslav , Myachin Valentin , Plakhotnik Olena , Fisunenko Nadiia , Mykhailenko Olha
Published: May 2024

The object of research is technology transfer, which covers the mechanism of transfer of technological knowledge and innovations from developers to end users or manufacturers. The problem to be solved is to provide a relevant assessment of the effectiveness of technology transfer by applying modern economic and mathematical models (based on the method of fuzzy logic) to assess the effectiveness of technology transfer under conditions of uncertainty.
The main results obtained: a fuzzy-logical model for evaluating the level of the technology transfer efficiency indicator was built; it is performed according to the following algorithm:
1) the involvement of three components of technology transfer – technological, financial, and marketing as input variables of the model, which are calculated on the basis of statistical and financial reporting data, expert surveys;
2) selection of parameters and type of membership function for three input variables and one output variable (integral indicator) and construction of a system of 27 logical rules;
3) determining the efficiency of technology transfer using Mamdani's fuzzy derivation and checking the adequacy of the model.
A visualization of the "input-output" surface was performed, which determines the maximum value of the TTPE (TechnologyTransferProjectsEfficiency) indicator, which serves as a summary indicator for the success of technology transfer projects and is observed at high levels of model input variables. The indicator T (technical component of technology transfer efficiency), F (financial component of technology transfer efficiency), and M (marketing component of technology transfer efficiency) was introduced.
The scientific results could be applied to determine the optimal ways of technology transfer to industry, to plan strategies for introducing new technological products to the market, taking into account the effectiveness of licensing, partnership, and cooperation processes
Finding an analytical solution for the cylinder’s fluxmetric demagnetizing factor using spherical harmonics
Authors: Getman Andriy , Konstantinov Oleksandr
Published: May 2024

The work examines an analytical solution for calculating the fluxmetric demagnetizing factor of cylindrical magnets at large values of magnetic susceptibility and an arbitrary value of elongation. The application of the analytical solution for calculating the demagnetizing factor significantly simplifies the modeling and calculation of magnetic characteristics of cylindrical technical objects. A simplified analytical model of the scalar potential of the magnetic field of a cylinder with infinite magnetic favorability, inductively magnetized in a uniform magnetic field, was constructed using an approximate representation of the distribution of fictitious magnetic charges on its surface. The method of spherical harmonic analysis for the magnetic field was used, which made it possible to obtain an analytical representation of the demagnetization field in the central cross section of the cylinder. Limitation of the harmonic series of this representation by seven first harmonics is proposed, and an additional amplitude factor is applied to correct the contribution of the first harmonic to the demagnetization field. This made it possible to compensate for the distortion of the magnetic field near the ends of the cylinder and bring the simplified analytical model closer to the target mathematical model with a uniform demagnetization magnetic field. The reliability of the results of calculating the fluxmetric demagnetizing factor according to the derived formula was evaluated by comparing them with the known results obtained using the numerical method of calculation and according to empirical formulas. It is shown that the proposed approach makes it possible to obtain reliable results of calculating the fluxmetric demagnetizing factor with a deviation of up to 5 % at infinite favorability in the range of cylinder elongation values from 0.01 to 500
Determination of the antioxidant potential of processing products of osmotically dehydrated chokeberry fruits and beer enriched with them
Authors: Samilyk Maryna , Illiashenko Yana , Rudichenko Yevhen , Yevtushenko Yevhen , Huba Svitlana , Tkachuk Svetlana , Ryzhkova Taisia , Heida Iryna , Lysenko Hanna , Severin Raisa
Published: May 2024

The demand for functional and health products, as well as the depletion of traditional raw materials, encourages the use of new types of resources. Aronia melanocarpa is a non-traditional plant raw material that has significant potential but is almost never used in the food industry. The aim of this study is to determine the antioxidant potential of processed products of osmotically dehydrated chokeberry fruits and beer enriched with them. The object of the study is the processing products of osmotically dehydrated chokeberry fruits and beer enriched with them.
Chokeberry fruits were dehydrated by osmotic dehydration and drying, ground into powders, and their antioxidant properties were determined. Osmotic solutions and fresh fruits were analyzed for flavonoids, anthocyanins and antioxidant activity. Three experimental samples of beer were produced using traditional technology (K) and with the addition of 6 % (D1) and 10 % (D2) osmotic solutions separated from partially dehydrated fruits. An organoleptic analysis of beer was carried out and its antioxidant activity was determined. The results showed that when using osmotic dehydration, the loss of flavonoids was significantly less (29.74 mg K/100 g) than when using the traditional drying method (39.13 mg K/100 g). When applying the proposed regime of fruit dehydration, about 70 % of anthocyanins are retained. While the traditional method preserves only 59 % of these pigments. The sugar solution on the surface of the fruit prevents significant loss of antioxidant compounds. This explains the higher antioxidant activity (9.86 mmol Trolox/100 g) in samples dehydrated using osmotic dehydration. Adding a chokeberry osmotic solution to beer in an amount of 6–10 % leads to an increase in its antioxidant activity by 9–16 mmol Trolox/100 g
Devising a procedure for the brightness alignment of astronomical frames background by a high frequency filtration to improve accuracy of the brightness estimation of objects
Authors: Vlasenko Vladimir , Khlamov Sergii , Savanevych Vadym
Published: May 2024

The object of this study is the background substrate of astronomical frames. To detect and compare the image of an object in a frame with its real image from astronomical catalogs, it is necessary to uniformly distribute the brightness of the background image substrate. Most often, the background alignment of astronomical frames is performed using the hardware calibration method applying the construction of service frames. However, it does not make it possible to eliminate the background from temporary stray light. Therefore, to solve this problem, a procedure has been proposed for brightness alignment of the background frame using high-pass filtering.
For high-pass filtering of images, three high-pass filters were considered – an ideal filter, a Butterworth filter, and a Gaussian filter. To remove coarse-grained image components from the image, a high-pass filter was used, which attenuates low-frequency harmonics of the image spectrum while simultaneously passing high-frequency harmonics.
Applying the devised procedure for brightness alignment of the background substrate of the frame has made it possible to increase the signal-to-noise ratio and reduce the dynamic range of the background substrate of the image. The study showed that when assessing brightness and identifying frames, the fitting provides better accuracy of reference to the starry sky. Also, the standard deviation of frame identification errors in this case is 5–7 times less than without using the devised procedure.
The devised procedure for brightness alignment of the background frame substrate was tested in practice within the framework of the CoLiTec project. It was implemented at the stage of intra-frame processing in the Lemur software for automated detection of new objects and tracking of known objects
Improving the production technique of pat based on multicomponent fruit and berry paste
Authors: Zagorulko Aleksey , Kasabova Kateryna , Zahorulko Andrii , Shydakova-Kameniuka Olena , Ponomarenko Nataliia , Bereza Olena , Gromov Aleksey , Kholobtseva Iryna
Published: May 2024

The object of this study is the technology of making fruit pat based on apple, apricot, and rosehip paste.
To increase the organoleptic and physical-chemical quality indicators, the technology of functional fruit pat for functional purposes has been improved by using fruit and berry paste as a fruit base. Accordingly, a technique for the production of fruit and berry paste (apple 50 %, apricot 35 %, rosehip 15 %) was devised. The peculiarity of the technique is a short-term, 30–40 s, concentration at 52–54 °C in a rotary evaporator, which will positively contribute to the preservation of the functional ingredients of raw materials, unlike conventional batch vaporizers. The paste has an improved viscous structure and organoleptic properties compared to the control, which makes it possible to recommend it as a fruit base for pat.
The viscosity of the pat mass based on the paste at 50 °C is 225 Pa∙s, which is 20 % higher than the control ("Fruit" pat), which will contribute to better structure formation. At the same time, the sample with the paste has better indicators of taste and smell, which can be characterized as natural and harmonious. The new pat has a natural orange saturated color and is characterized by a long-lasting consistency, and the content of functional ingredients significantly exceeds the control sample. The quantitative content of dietary fiber, vitamin A, C, β-carotene is important, according to which the devised pat based on the paste can be classified as a functional product. The new products are characterized by an organic composition of raw materials, do not contain artificial dyes and flavors, and the proposed technological solutions simplify the process of their production, which makes it possible to recommend the technology for implementation at craft enterprises
Finding and implementing the numerical solution of an optimal control problem for oscillations in a coupled objects system
Authors: Mamtiyev Kamil , Rzayeva Ulviyya
Published: May 2024

In the modern world, where efficiency, stability, and precision play a crucial role, the development and application of optimal control strategies in oscillatory systems hold significant importance. The issues related to the numerical solution of control problems associated with damping oscillatory systems consisting of two objects are considered. To numerically solve the discussed problem, the gradient projection method, based on the formula for the first variation of the functional, and the method of successive approximations, associated with the linearity of boundary problems describing oscillatory processes, are applied. The oscillations of one object are described by a wave equation with first-order boundary conditions, while a second-order ordinary differential equation models the oscillations of the other object. Furthermore, the original and the adjoint boundary value problems are solved using direct methods at each iteration step. An algorithm for the numerical solution of the problem is proposed, and based on this algorithm, a software code for implementation is developed. The numerical results obtained in the study demonstrate that there is convergence in terms of functionality, and the approximately optimal controls found in this process are minimizing sequences in the control space. The mechanism of controlling and regulating the operation of the system according to its input constraints is provided by observed feedback, allowing systems with limited excitation to maintain stability and optimal functioning in conditions of changing external or internal circumstances. The obtained results can also be used to forecast the system's behavior in the future, resource planning, prevention of emergencies, or optimization of production processes
Determining directions for improving the legal regulation of technology transfer forms
Authors: Davydiuk Oleksandr , Shvydka Tetiana , Hnatkivskyi Bohdan , Ivanova Hanna , Vaksman Rehina
Published: May 2024

The object of this study is the existing regulatory approaches to determining the forms of technology transfer in the legal systems of economically developed countries of the world, international treaties, and agreements.
During the research and generalization of existing concepts, it was established that they are not unified and differ significantly from each other. It has been proven that this does not meet the needs of technology transfer participants and significantly destabilizes the technology transfer process. The expediency of improving the existing normative concept of determining the forms of technology transfer by fixing their single list has been substantiated. Recommendations on the list of the main forms of technology transfer have been formed based on a systematic analysis of legal acts that determine the peculiarities of the essence of technology. A classification of the main forms of technology transfer was proposed. Four main forms of technology transfer were identified as the transfer of rights to technology during its creation, within the framework of joint cooperation, within the framework of cooperation based on corporate and/or proprietary commercial principles. The expediency of dividing each form of transfer into separate subtypes was also substantiated. The need to make changes to the provisions of such international treaties and agreements as the World Trade Organization Agreements, the Recommendations of the World Organization for the Protection of Intellectual Property, the Oslo Guidelines, the UNCTAD Recommendations, and the framework program "Horizon Europe" has been proven.
The study is aimed at forming general theoretical foundations for improving the essence of regulatory techniques for identifying forms of technology transfer. The research results could be used in the formation of international normative acts, recommendations of international institutions, acts of national legislation, and serve as a basis for further scientific research into these issues
Construction of the mathematical model of magnetic transmission for an autonomous wind power plant
Authors: Kovalenko Mykhailo , Kovalenko Iryna , Tkachuk Ihor , Reutskyi Mykola , Harford Aaron , Zhuk Serhiy
Published: May 2024

The object of research is electromagnetic and mechanical processes in magnetic transmission for an autonomous wind power plant of small power.
The use of magnetic transmission as part of an autonomous wind power plant makes it possible to improve the reliability and efficiency of such a system.
In the current work, a study of magnetic transmission as part of an autonomous wind power plant was carried out to investigate the parameters and characteristics of magnetic transmission.
This paper reports the construction of a numerical simulation mathematical model of a magnetic reducer operating as part of an autonomous wind power plant with a permanent magnet generator. The model takes into account discrete structure of internal and external rotors and modulator; changes in model parameters when input parameters change. It also takes into account losses, change of load angle and electromagnetic moment; the effect of changing the generator load.
The built model of the magnetic reducer system differs in that the change in the generator load leads to a shift of the operating point on the mechanical characteristics of the rotor of the wind power plant (WPP). The model also works in the opposite direction: changes in wind parameters affect power, voltage, current, and electromagnetic moment.
With the help of the model built, the parameters and characteristics of not only the magnetic reducer but also other components of the system were investigated. The efficiency at the output of the electric generator was determined, which is ≈75 % at a load of 2.0 kW. The magnetic transmission moment at a wind speed of 7.8 m/s for the high-speed rotor is 0.91 N∙m, and the low-speed rotor is 7.8 N∙m, which corresponds to a transmission ratio of 8.6. This expands opportunities for exploratory research
Identifying the influence of land logistic driver cognitive energy impact on supply chain performance through agent-based simulation
Authors: Tama Ishardita Pambudi , Hardiningtyas Dewi , Sudiarno Adithya , Larasati Aisyah , Nugroho Willy Satrio
Published: May 2024

Logistic transports link demand generators, distributors, and producers in a supply chain network (SCN). The existence of logistic transports is critical to ensure whole nodes’ economic sustainability. This study explores the impact of human factors on SCN performance through cognitive energy expenditure (CEE) tracking. Agent-based model (ABM) simulation was used to analyze the impact of CEE from truck driver’s electroencephalography (EEG) data to obtain the postsynaptic potential values, which were then transformed to calorific energy. The fleet agents, retailers and distributor models were built based on the East Java, Indonesia, logistic transport route around Karanglo, Gempol, Bungurasih, and Gubeng. The frequency and the peak value of the EEG data, postsynaptic potential, and energy data indicate the same information. All data indicate that more challenging routes have higher frequency and higher peak values. The ABM simulation of the fleet agents shows balanced CEE throughout entire routes due to the precise rest period and eat scheduling. The average delivery success rate was 8 out of 30 or 26.7 % in each simulation time step. Hence, most goods delivery tasks can be completed by fleet agents in a balanced system. As a consequence, the SCN performance is also balanced due to the fluid inventory shift without overstock and stockouts. The rest and eat periods of a fleet agent were scheduled after the CEE has been peaked. The time lag between rest periods and transport operations has to be maintained to overcome fleet agents task buildup. Task buildup has a potential to decay both transport safety and inventory shift rates. Therefore, the upgrade in SCN performance is possible through proper fleet agents scheduling
Devising a technique for assessing the accuracy of measuring electric motor torque
Authors: Kvasnikov Volodymyr , Kvashuk Dmytro , Prygara Mykhailo , Siryy Dmytro , Shelukha Oleksii
Published: May 2024

The object of this study is a technique for assessing the accuracy of measuring the torques of electric motors. This technique is based on the improvement of dynamic torque measurement processes under transient operating modes. Special attention was paid to devising adaptive methods to normalize the output signal, which take into account vibrations and nonlinearities of the measuring channel.
In order to improve the accuracy of measurements under conditions when the controlled parameter has different deviations from its average value, a technique for integrating time measurement intervals was proposed. That has made it possible to generalize parameter fluctuations, providing more stable measurement results.
This paper reports the simulation of the process of measuring torques of electric motors under transient operating modes and under vibration conditions. That has made it possible to test the proposed technique for estimating the variance of the methodological error, which includes the integration of measurement time intervals and makes it possible to increase the accuracy of the measurement under the conditions of transient modes in electric motor operation.
An algorithm for correcting the error of the dynamic torque of the electric motor has been proposed, which allows it to be corrected. This becomes possible owing to the use of a reference measure and the proposed technique for determining the deviations of the controlled parameter of the measured quantity, as well as the automatic calibration of measuring transducers.
The algorithm allows for flexible settings of the corrective action, expanding the potential of electric motor control systems. It can complement soft measurement methods, as well as adjust the threshold values of deviations under different operating modes of electric motors. This allows the measured systems to better adapt to changes in operating conditions, to adjust the specified measurement accuracy under conditions of uncertainty