bluuebunny/crossref_metadata_2025 huggingface dataset:
STRUCTURE OF THE SYSTEM FOR MONITORING THE CONDITION OF NITROCELLULOSE POWDER DURING THEIR STORAGE PERIOD BETWEEN PRODUCTION AND DISPOSAL
Authors: Anipko O. , Baulin D. , Manzhura S.
Published: December 2024

The stability of powder charges based on nitrocellulose plays a decisive role in determining their service life. As the research analysis shows, in almost all countries of the world there is a problem of maintaining the properties of powder charges at the guarantee level. The properties of nitrocellulose powder charges are constantly changing, and a large part of them is in the post-warranty stage of storage. Changes in the properties of nitrocellulose powder charges can be such that they lead to man-made accidents and disasters, both when using them for their intended purpose and when they are stored in bases and warehouses. Thus, the task of assessing the state and forecasting the properties of nitrocellulose powder charges at the relevant stages of storage becomes relevant.
This task is complex and can be solved using a well-known approach to solving such tasks, namely a monitoring system. In general, any monitoring system includes three main components: measurement of informative parameters; assessment of the current state based on the performed measurements; forecast.
It is shown that the problem of storage and accumulation of a large amount of ammunition, namely powder charges, is characteristic not only for Ukraine, but also for such developed NATO countries as the USA, Germany, France, and the Czech Republic. There is evidence that in some countries a system of continuous monitoring of the state of ammunition has been introduced, but the research methods are imperfect and dangerous.
To control the state of nitrocellulose powder charges, it is proposed to create a monitoring system.
A structural diagram of the monitoring system is presented, which includes both already developed elements and those that require additional research and development. It is shown that for the effective operation of the monitoring system, informative indicators are necessary, which allow determining the state of powder charges without the use of complex diagnostic equipment. In addition, it will allow the creation of a database of powder charges for further monitoring of their condition throughout the entire life cycle.
An approach to defining and substantiating new constituent elements of the oil refinery condition monitoring system has been developed.
DETERMINATION OF HEAT TRANSFER CONDITIONS WHEN COOLING A HIGH-TEMPERATURE SURFACE
Authors: Selikhov Yu. A. , Gorbunov K. О. , Ponomarenko G. V. , Nagorniy E. R. , Pilnyk I. V. , Ris V. G.
Published: December 2024

The solution of inverse heat conduction problems for the identification of parameters of mathematical models is of particular importance for ensuring the adequacy of these models in the presence of experimental information about the thermal process under study. The effectiveness of decisions made when designing various power equipment depends both on the depth and reliability of knowledge of heat exchange phenomena and on the adequacy of modeling various thermophysical processes. In order to create effective methods for diagnosing and identifying such processes, experimental studies are conducted and their results are processed. These methods can be based on solutions of inverse problems of heat conduction for both homogeneous and composite media. In some cases, methods for solving inverse problems are the only means of obtaining the necessary information about the object under study. This paper presents a mathematical model for determining the temperature field of a specially designed thermal probe rod and a method for solving the boundary inverse problem of thermal conductivity (BIP), which is reduced to determining heat flows and heat transfer coefficients based on experimental temperature measurements at one or more internal points. The value of the heat flow and the heat transfer coefficient at the working end of the thermoprobe rod when it is cooled by liquid will be determined as a result of solving the OZT. The solution itself will be performed by a direct method, and its implementation will be carried out numerically.
A СOMPREHENSIVE APPROACH TO PREVENTING MOLD GROWTH OF SOLID ORGANIC WASTE FROM CONFECTIONERY PRODUCTION AS THEIR SUSTAINABLE MANAGEMENT ELEMENT
Authors: Miroshnychenko D. V. , Bayrachny V. B. , Adashevsky O. V.
Published: December 2024

Waste sustainable management involves both minimizing their quantity by improving technological processes and using waste as resources. A large amount of solid organic waste from confectionery industries contains food elements that can be used as additives in compound feeds production. This reduces compound feeds cost without losing their quality, and also provides for the secondary use of solid organic waste from confectionery industries, which corresponds to the generally accepted waste management hierarchy. The main limiting factor for this waste type using in compound feeds is mold fungi rapid development, which is due, among other things, to an increase in the waste humidity when stored in an open manner at industrial sites.
The aim of the work was to research developed integrated approach effectiveness to increase the shelf life without the mold fungi appearance for solid organic waste from confectionery industries.
The following research methods were used in the work: field – to observe the mold fungi development in real storage conditions of solid organic waste from confectionery industries in an open way; laboratory – to determine the moisture content of waste at different times according to DSTU 4910:2008 and sanitary and mycological waste assessment.
The use of the simplest measures to reduce the atmospheric contact precipitation with solid organic waste from confectionery industries – canopies – allows us to increase the period until the mold fungi appearance by 20 or more days, depending on the waste composition. Faster mold fungi development is characteristic of waste that contains more than 50 % wafers with fat filling. Solid organic waste from confectionery industries treatment with humic acids alkaline solution obtained from brown coal increases the period until the mold fungi appearance by an average of 50 days. The two methods combination is effective for increasing the shelf life of solid organic waste from confectionery industries before their use in compound feeds. Thus, it is possible to increase the share such waste use in compound feeds.
The proposed integrated approach to increasing the shelf life of solid organic waste from confectionery industries allows to increase the waste share that is suitable for secondary use in compound feeds. The humic acids alkaline solutions using as a bactericidal measure for solid organic waste from confectionery industries is justified from the sustainable approach for brown coal using, allows to increase the nutritional value of the final compound feeds and reduces energy costs for mold fungi elimination.
Optimization of distribution network mode by voltage under modern conditions
Authors: Khomenko Igor , Shkrebela Andri , Orlov Viktor
Published: December 2024

The article examines a fragment of a real distribution electrical network with a voltage level of 35–110 kV, consisting of a closed-loop 110 kV network with 35 kV branches. Real technical parameters of transformers installed at load nodes and the characteristics of power line conductors were used. The analysis took into account the actual load values, considering the operation of alternative energy sources connected to each node. Under the influence of these factors, some load nodes transform into generator nodes. A calculated equivalent circuit of this network was obtained, considering both longitudinal and transverse parameters. The calculation algorithm used for analyzing the operating modes of the electrical network is described. Numerical calculations of the normal operating modes of the network were performed using a simulation program, enabling the study of the impact of voltage regulation on electrical energy losses. Specifically, the study examined how changes in the voltage level at the base and balancing nodes of the 110 kV network affect the steady-state normal operation of the entire network. The research includes a comparative analysis of energy losses for different components: active and reactive power. This approach allows conclusions to be drawn regarding the influence of voltage regulation measures on energy losses. Based on the performed calculations, the quantitative and qualitative impact of increasing voltage levels at the base node on reducing energy losses across the entire network was determined. Thus, a conclusion was made about the potential for optimizing the operating mode of the electrical network through voltage regulation.
Methodology for analyzing the impact of electric vehicles on distribution networks: a theoretical approach
Authors: Nozdrenkov Valerii , Diahovchenko Illia , Petrovskyi Mykhailo
Published: December 2024

The growing demand for electricity and the rapid proliferation of electric vehicles present significant challenges for low-voltage distribution networks, particularly their critical components, such as distribution transformers. Infrastructure designed for traditional loads faces the risk of overloading due to high peak loads caused by uncontrolled electric vehicles charging. This paper develops a comprehensive methodological approach to assessing the impact of charging processes on the lifespan of distribution transformers, considering various levels of electric vehicles penetration, combinations of electrical loads, and local operating conditions. The study is based on the hypothesis that is optimizing charging schedules, particularly shifting charging to off-peak hours, can significantly reduce transformer ageing rates and enhance the reliability of the power supply. The proposed methodology employs a fuzzy logic-based model that integrates numerous factors affecting transformer performance, including ambient temperature, harmonic distortion, reactive power compensation, reverse energy flows from photovoltaic installations, and overload risks. The study examines charging scenarios on demand, off-peak charging, and a combined mode with vehicle-to-home (V2H) technology, which integrates electric vehicles as a backup energy source for household needs. The results demonstrate that such approaches can minimize network upgrade costs while maintaining network stability even under high electric vehicles penetration levels. The presented methodology provides a foundation for developing adaptive energy resource management strategies aimed at improving distribution system resilience, extending transformer lifespan, and enhancing the economic efficiency of the infrastructure.
The relevance of the issue of increasing the energy efficiency of the electricity conversion process in the current conditions of operation of the electricity distribution networks of Ukraine
Authors: Baklytskyi Vladyslav
Published: December 2024

The work sets out the basic conditions for the functioning of Ukrainian electric networks, including: the need to comply with the requirements of European integration; functioning in conditions of a deficit in generating capacity and market relations; changing the nature of electricity consumption; wear and tear of electric network equipment. The tasks that are associated with the conditions for functioning and require solutions for the reliable functioning of electric networks and further activities of Ukraine as a member of the European Union are indicated. The main tasks set out in the work include: improving the reliability of electricity supply; the need to increase the level of informatization, automation and energy efficiency. It is noted that on the way to solving the set tasks, the implementation of work on the reconstruction of electric networks is carried out, the basis for financing which is investment programs. The issue of improving the energy efficiency of the process of transforming electric energy under the current conditions of the functioning of the Ukrainian electric networks is revealed and analyzed. Based on the results of the analysis, it is established that the issue of improving the energy efficiency of the process of transforming electric energy is relevant at the time of reconstructing electric networks. It is indicated that the analysis of the energy efficiency of transforming electric energy can be carried out on the basis of a technical and economic model of the costs of transforming electric energy and the parameters that affect the size of the costs. It is noted that in the case of presenting the parameters included in the technical and economic models of costs for the transformation of electrical energy in the form of separate components, a competing effect is observed between the components. It is noted that the advisability of the formulation of general calculation methods for calculating the economic component during the review of the nominal power of transformers.
Development of thermal model of an oil-filled transformer in Ansys environment
Authors: Shevchenko Sergii , Danylchenko Dmytro , Ganus Roman
Published: December 2024

The paper deals with modelling of thermal modes of an underground substation using the Ansys software environment. The main attention is paid to the oil-filled transformer TRDN-63000/110, for which a simplified geometric model was created in the Design Modeler module. The thermal processes were modelled in Ansys Steady-State Thermal using a triangular mesh and adjusting material parameters such as thermal conductivity and cooling medium properties. The study analysed the transformer's operating modes: short circuit, no-load, and transient states. In the short-circuit mode, the modelling results showed that when using transformer oil, the maximum temperature of the active part is reduced to the range of 67–91 °C, which is significantly lower than in the case of air cooling, when the temperature exceeded the permissible values (225 °C). In the no-load mode, the maximum temperature of the transformer was only 35 °C, which indicates the effectiveness of oil cooling even at minimal power loads. Particular attention is paid to the study of the dependence of the maximum temperature of the transformer core on the density of heat fluxes in different operating modes. It is shown that the maximum temperature is directly proportional to the load and heat flux density, and the highest heat transfer intensity is observed near the windings. The obtained results allow us to assess the efficiency of heat dissipation of the transformer and its impact on the heat balance of the substation premises. The modelling data can be used to improve the design of transformers, optimise cooling systems and ensure reliable operation of power equipment in underground substations. This study emphasises the importance of using modern numerical methods to analyse the thermal characteristics of transformers and adapt them to difficult operating conditions.
Teacher-Student Interaction Models: Effective Strategies for Increasing Student Participation and Motivation
Authors: Sinaga Dameria
Published: December 2024

Effective teacher-student interactions are pivotal in fostering an engaging and motivating learning environment. Despite recognizing their importance, educators often seek evidence-based strategies to enhance student participation and motivation consistently. This study identifies and evaluates various teacher-student interaction models to determine their effectiveness in increasing student participation and motivation within diverse educational settings. Employing a quantitative methods approach, the research involved 150 teachers and 1,200 students across multiple secondary schools in East Jakarta Indonesia. Quantitative data were collected through structured surveys measuring student engagement and motivation levels, while qualitative insights were garnered from semi-structured interviews and classroom observations. Statistical analyses, including ANOVA and regression models, were utilized to assess the impact of different interaction strategies. Thematic analysis was conducted on qualitative data to identify recurring patterns and contextual factors influencing outcomes. The findings indicate that interaction models emphasizing collaborative learning and personalized feedback significantly enhance student participation and motivation. Specifically, strategies such as the Socratic Method and Flipped Classroom demonstrated a 25% and 30% increase in student engagement metrics, respectively. Additionally, the integration of technology-mediated interactions was found to foster higher levels of student motivation compared to traditional instructional methods. Qualitative data revealed that teachers' interactive and student-centered approaches made students feel more valued and empowered.
Natural Language Processing and Machine Learning Applications For Assessment and Evaluation in Education: Opportunities and New Approaches
Authors: Yılmaz Kübra , Deniz Kaan Zulfikar
Published: December 2024

This study examines the applications of Artificial Intelligence (AI), Machine Learning (ML) and Natural Language Processing (NLP) technologies in education, particularly in educational assessment and evaluation processes. The study examines the potential of these technologies to contribute to educational assessment and evaluation processes in areas such as automatic item generation, text mining, sentiment analysis, sentence similarity, and providing feedback to students. The study includes both a literature review and sample applications. In the automatic item generation process of the study, language models such as GPT and Gemini are used to generate new educational questions and this process is supported by NLP technologies. The study is enriched with Turkish examples and the results show that these applications can be further developed for Turkish and have potential for other applications.
La madre Deméter letal en Las madres no de Katixa Agirre
Authors: Toledo Olivar Araceli
Published: December 2024

Las madres no (2019) de Katixa Agirre da cuenta de un filicidio doble perpetuado por una mujer joven en el País Vasco. La narradora de la novela investiga y escribe sobre el crimen al tiempo que experimenta, con marcados altibajos emocionales, su propio embarazo. En este artículo me interesa analizar la figura de la Madre Deméter Letal desde la perspectiva Junguiana de Eric Neuman, Jean Shinoda Bolen y Sibylle Birkhäuser-Oeri, con el objetivo de delimitar los elementos arquetípicos de dicha imagen. De igual forma, me detengo en la reflexión que la narradora elabora sobre el peso abrumador de la maternidad, considerando que dicha introspección representa para la sociedad una suerte de monstruosidad, dado que se contrapone a los ideales de la figura materna sacrificada y abnegada. Para tales efectos, recurro a la perspectiva de Marcela Lagarde y de los Ríos.
Silicon Nitride-on-Insulator Photonics Polarisation Convertor
Authors: Mokhovikov D. M. , Barbin E. S. , Nesterenko T. G. , Talovskaya A. A. , Myrzakhmetov A. S. , Kulinich I. V. , Baranov P. F. , Il’yaschenko D. P.
Published: December 2024

Photonic integrated circuits constitute a vital component of contemporary telecommunications systems, facilitating traffic management and reducing energy consumption. However, the integration of these components presents a significant challenge in the form of high polarization sensitivity, which has the potential to limit the overall performance of the device. The objective of this study was to develop a design method and fabrication technology for polarization converters based on silicon nitride-on-insulator. The design of the polarization converters was optimised through the utilisation of finite element method simulations, conducted using the ANSYS Lumerical software. The device features an asymmetric rib waveguide, which facilitates efficient polarisation rotation. The technological implementation comprised plasma chemical vapor deposition of silicon nitride films, three-dimensional laser lithography, and reactive ion etching. A technological assessment determined that the reproducibility tolerance was ± 60 nm. To address this limitation, a mirrored section was incorporated into the polarization converter design, thereby increasing the allowable fabrication tolerance to ± 215 nm without compromising device performance. The optimised polarization converter exhibited a high level of polarization rotation efficiency, reaching 96.3 %, and an output power of 98.32 %. The utilisation of an asymmetric rib waveguide was pivotal in attaining these outcomes, facilitating the transfer of optical power from fundamental transverse electric to fundamental transverse magnetic modes. The incorporation of a mirrored section enhanced the device's manufacturability, maintaining performance despite geometric deviations. These findings highlight the robustness of the proposed design under typical fabrication constraints. This study presents a novel design and fabrication method for silicon nitride on insulator-based polarization converters. The proposed approach improves efficiency and stability. These results provide a foundation for future advancements in integrated photonics, with potential applications in telecommunications and beyond.
Influence of the Level of Defective Insulation Resistance of Electrical Machine Windings on Parameters of no-Load Current
Authors: Isaev A. V. , Suhodolov Yu. V. , Sizikov S. V. , Lomtev A. A. , Lychkovsky V. A.
Published: December 2024

Diagnostic methods that will change at present for monitoring the condition of windings of electric machines do not allow to detect defect formation in them at early stages of development. And this problem is especially relevant for equipment that is directly in its operating mode. The purpose of the work was to consider and evaluate the possibility of a method that, based on the analysis of the parameters and characteristics of the no-load current, will allow to characterize the state of the current-carrying parts of the windings of diagnosed electric machines. The paper presents the results of experimental studies of the patterns of influence of the level of defective resistance of interturn insulation in the windings of electric machines on the parameters of the no-load current, including the features of changes in the parameters of its spectral components. The article also defines analytical dependencies of the obtained characteristics of influence and analyzes the factors that determine the measurement errors of the developed method. The presented method based on the analysis of the parameters of the spectral components of the no-load current is intended for measuring the resistance of the interturn insulation of current-carrying parts in the windings of electrical machines under their operating conditions, with the possibility of recording the onset of defect formation, which will allow real-time assessment of its operational, pre-failure and serviceable state.
Control of Integrated Circuits Crystals' Surface Microrelief and Defects of Heteroand Submicrostructures by the Atomic Force Microscopy Method
Authors: Lapitskaya V. A. , Chizhik S. A. , Lutsenko E. V. , Solovjov J. A. , Nasevich A. A. , Liutsko K. S. , Petlitskaya T. V. , Makarevich V. B. , Guangbin Yu.
Published: December 2024

The aim of the work was to study the structure and defects of a channel transistor with two types of conductivity (p and n), the submicrostructures based on nickel silicide films, and the seed layers based on AlN using atomic force microscopy (including conductive or electric force method, which allow one to study the electrical conductivity of the material surface). The influence of the manufacturing technology and local oxide formation on the relief and structure of the pand n-type transistor was established. The local oxide is necessary for the electrical isolation of the transistors from each other. The surface roughness is higher on the surface and outside the p-channel transistor than on the n-channel transistor. When examining the AlN layers both in the topography mode and in the adhesion mode, defects in the form of pores were revealed, which are places of electrical breakdowns, which worsens the properties of the such heterostructures. With an increase in the temperature and time of nitriding, the defects of the AlN layers significantly decrease. The conductive areas on the surface of the nickel silicides after rapid thermal treatment at 300 and 400 °C using electric force microscopy were detected, which shows incomplete formation of nickel silicide during the treatment. Thus, the efficiency of the atomic force microscopy method using a specialized conductive technique as a method for monitoring microelectronic components was demonstrated.
Wafer-Level Packaging of Microelectromechanical Systems Based on Frame Structure
Authors: Barbin E. S. , Kulinich I. V. , Nesterenko T G. , Koleda A. N. , Shesterikov E. V. , Baranov P. F. , Il’yaschenko D. P.
Published: December 2024

Modern microelectromechanical systems (MEMS) are devices that incorporate microelectronic components and micromechanical structures on a single chip. Packaging is a mandatory stage in MEMS manufacturing. It ensures mechanical protection, sealing and transmission of electric energy and signals. The present work was aimed at developing a MEMS packaging method as a part of the consolidated manufacturing process. The method is developed on the example of a microwave MEMS switch. The switch manufacturing scheme includes conventional technologies used for producing gallium arsenide integrated circuits: optical lithography, liquid etching, electron-beam and magnetron deposition of metallic, resistive and dielectric films. The work presents a new inter-plate MEMS packaging based on a frame structure with a passivating film. The main purpose of the package frame layer is mechanical support for an upper layer of the sealing material. The frame layer should have the structure allowing for unimpeded removal of the sacrificial photoresist and be impermeable for the sealant. To satisfy the requirements stated, a metallic thin copper-film spatial frame was fabricated by galvanic deposition. The frame structure is a geodesic dome comprised of a complex network of triangle cells arranged in rows. The connected triangles create a self-supporting durable framework. The measurement and modeling results demonstrate that the round frame structure is more durable than a square frame with the same maximum cell dimensions. The stress-strain state for the round framework considerably alters depending on the number of rows of triangle cells. In addition to the mechanical support, the cell structure of the framework – with adequate selection of cell dimensions, solvent and sealant viscosities – allows for unimpeded penetration of the solvent (N-methyl-2-pyrrolidone, NMP) and removal of ma-P1225 photoresist sacrificial layers. At the same time, the layer structure is impermeable for the sealant (benzocyclobutene, BCB). The proposed MEMS switch packaging enables mass fabrication of GaAs integrated circuits in a single process, which expands their frequency range. The new plate-level packaging technology is absolutely compatible with MEMS fabrication technology without specific materials and equipment which reduces the dimensions and cost of MEMS.
Stabilization of Environmental Conditions when Liquid Density Measuring by Hydrostatic Weighting
Authors: Bakovets N. V. , Kozadayev K. V.
Published: December 2024

When assessing the quality of products, especially oil and oil products, the density value is widely used along with other parameters. Density data are fundamental for studying the properties of liquids, their identification and determining the degree of purity. They are also necessary for indirectly assessing with a certain degree of accuracy some other properties of the liquid, such as specific gravity, thermal expansion or contraction, the mass of a known volume of liquid, etc. In turn, the accuracy of the density determination determines the correctness of the decision made in the technological quality control of the manufactured products. Determining the density of a liquid with high accuracy requires maintaining stable temperature conditions during the measurement process. The purpose of the work was to establish the effect of temperature stability on the reproduction and transmission of the unit of liquid density. To stabilize the temperature, a technical solution is proposed, implemented in the form of a climatic chamber, inside which reference equipment is placed. A study of the temperature conditions in the process chamber was carried out. It was found that due to the technical solutions used, the influence of environmental conditions on the change in the temperature of the liquid under study is a negligible value.
Author index
Authors: Editotial Article
Published: December 2024

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Complexification through gradual involvement and reward Providing in deep reinforcement learning
Authors: Rulko, E. V.
Published: December 2024

Training a relatively big neural network within the framework of deep reinforcement learning that has enough capacity for complex tasks is challenging. In real life the process of task solving requires system of knowledge, where more complex skills are built upon previously learned ones. The same way biological evolution builds new forms of life based on a previously achieved level of complexity. Inspired by that, this work proposes ways of increasing complexity, especially a way of training neural networks with smaller receptive fields and using their weights as prior knowledge for more complex successors through gradual involvement of some parts, and a way where a smaller network works as a source of reward for a more complicated one. That allows better performance in a particular case of deep Q-learning in comparison with a situation when the model tries to use a complex receptive field from scratch.
Modal analysis of plate-like cellular objects with periodic structure
Authors: Naprasnikov V. V. , Borodulya A. V. , Polozkov Yu. V. , Kunkevich D. P. , Wang Tzu ZhuI
Published: December 2024

The method used to calculate natural frequencies and vibration shapes is described. Code fragments for construction for some types of filler are presented. The obtained frequencies and shapes of natural vibrations for three types of filler on the example of one construction are given.
Obstacle avoidance algorithm in mobile robot motion
Authors: Sidorenko A. V. , Saladukha N. A.
Published: December 2024

A method has been proposed, and a computer program has been developed for simulating obstacle avoidance by a robotic system. To expand the mobility capabilities of the robotic system, the algorithm combines the core elements of the vfh algorithm and our previously developed algorithm I [1], and is positioned in this work as algorithm II. An evaluation of the average obstacle avoidance time for various types of obstacles has been conducted, including five cubic obstacles, a long wall obstacle, and a complex obstacle. During the computational experiment using the Gazebo 11 simulation environment, the time parameters for robot movements around various types of obstacles were calculated, including five cubic obstacles, a wall obstacle, and a complex obstacle. In the computational experiment, statistical processing of the obtained results was carried out. It was shown that using the proposed algorithm, the assessment of the average time for the robotic system to avoid obstacles is reduced in some cases by up to 7.2 times compared to the use of algorithm I.
Problems of the process of moistening raw cotton and cotton fiber. Cotton fiber wetting process problems
Authors: Ortiqov Z. U.
Published: December 2024

The moistening of raw cotton and cotton fiber is a critical stage in the textile production process, significantly influencing the quality of the final product. However, achieving optimal moisture content presents numerous challenges. One of the primary problems is the uneven distribution of moisture during processing, which can lead to variations in fiber strength and quality. The inappropriate application of water or humidification methods often causes fiber shrinkage, reduced durability, and increased contamination. Furthermore, the control of temperature and humidity plays a vital role in preventing over-drying or excessive moisture retention, both of which can negatively affect the spinning and handling properties of cotton fibers. Technological limitations, coupled with the complexity of monitoring moisture levels accurately, result in inefficiencies in the cotton processing industry. Research has also shown that improper moisture regulation can lead to decreased efficiency in machinery, increased energy consumption, and a higher likelihood of fiber damage during transportation and storage. Therefore, addressing these issues requires advancements in moisture control technologies and the development of standardized procedures to ensure consistent and high-quality cotton fiber production.
Behavior of a mobile robot with symmetrical structure of mecanium wheels when movement along a curvolinear trajectory
Authors: Pauliukavets S. A. , Velchenko A. A. , Radkevich A. A.
Published: December 2024

The article presents a comparative analysis of two variants of symmetrical placement of omnidirectional mecanum wheels in a mobile robot. The modeling of the mobile robot behavior with two symmetrical variants of mecanum wheel arrangement along curvilinear trajectories in the MATLAB Simulink environment is considered. Graphs of the robot center trajectories in the X–Y axes are obtained for two variants of symmetrical mecanum wheel configurations when moving along the trajectories of a lemniscate, ellipse, hypotrochoid, and track. Dependences of the robot position errors in the X–Y axes on time are obtained for two variants of wheel topologies when moving along four trajectories. Dependences of the robot body rotation angle deviation on time are analyzed for two variants of wheel topologies when moving along four curvilinear trajectories. The comparative analysis made it possible to give recommendations on movement along the ellipse and lemniscate, which are characterized by smaller position errors and deviations in the rotation angle compared to more complex curves.
Inteligencia comercial y competitividad de una empresa del sector textil importador, distrito de Lince (Lima-Perú), 2022
Authors:   , Prado Gamarra Carlos Emmanuel , Rojas Salas Milenka Fiorella
Published: December 2024

En la presente investigación, titulada Inteligencia comercial y competitividad de una empresa del sector textil importador, distrito de Lince (Lima-Perú), 2022, se tuvo como objetivo determinar la relación existente entre la inteligencia comercial y la competitividad de una empresa ubicada en el sector textil importador, específicamente en el distrito de Lince en Lima-Perú. El enfoque utilizado en este estudio fue de naturaleza cuantitativa, con un alcance correlacional, y se aplicó un diseño transeccional correlacional-causal. Para llevar a cabo la investigación, se empleó un cuestionario estructurado que fue administrado a toda la muestra de interés, la cual estuvo conformada por 28 colaboradores de la empresa objeto de estudio. A través de este estudio, se obtuvo información relacionada con la inteligencia comercial y la competitividad en la organización evaluada. Como resultado, se concluyó que existe una correlación positiva moderada entre la inteligencia comercial y la competitividad de la empresa del sector textil importador en el distrito de Lince (Lima-Perú) en el año 2022. Esta conclusión se basa en la evidencia proporcionada por el coeficiente de correlación de Pearson, el cual arrojó un valor de 0.534, con un nivel de significancia de 0.003. En otras palabras, la hipótesis alterna, que afirmaba la existencia de una relación moderada entre las variables, resultó ser verdadera.
Capacidad pronóstica de los sistemas de clasificación de pie diabético para amputación de miembro de inferior en América Latina y El Caribe: una revisión sistemática con metaanálisis
Authors:   , Tacca Quinteros Paola Mashiel , Tantalean Gutierrez Lily Veronica
Published: December 2024

Objetivo: Estimar la sensibilidad y especificidad para amputación de miembro inferior de escalas de pie diabético de estudios realizados en América Latina y el Caribe. Métodos: Se incluyeron estudios tipo cohorte retrospectivos y prospectivos sin restricción de idioma, buscados en las bases de datos Scielo, Embase, PubMed, WOS y SCOPUS. hasta julio de 2023. Los estudios describen la ocurrencia de amputación según un sistema de clasificación basal en pacientes con pie diabético. Sin embargo, no se encontraron estudios que evalúen el pronóstico, por lo tanto, realizamos un meta-análisis de exactitud de pruebas diagnósticas usando STATA 18. Evaluamos el riesgo de sesgo con QUADAS-2 y la certeza de evidencia según GRADE. Resultados: Incluimos 13 artículos que cumplieron los criterios, y pudimos determinar rendimientos diagnósticos para cinco escalas (IDSA, San Elián, WIFI y Wagner con umbral en grado 3 y grado 4) y tres componentes (profundidad, infección e isquemia de la escala Texas). Se realizaron nueve metaanálisis y 15 evaluaciones GRADE para amputación mayor o amputación a cualquier nivel por cada escala y/o componente. De manera individual, la clasificación que presentó mayor sensibilidad para ambos desenlaces fue la escala Wagner con umbral en grado 3; con 1.00 (IC95%:0.48 – 1.00) y 0.91 (IC95%: 0.64 – 0.98; I2= 70.2) respectivamente. La clasificación que tuvo mayor especificidad para ambos desenlaces fue la escala San Elián 0.92 (IC95%: 0.83 – 0.97; I2=79.4) y 0.92 (IC95%: 0.88 – 0.95) respectivamente. Las 15 evaluaciones GRADE presentaron una muy baja certeza de evidencia. Conclusión: La escala Wagner con umbral en el grado 3 y la escala San Elián presentaron la mayor sensibilidad y especificidad respectivamente. Importantes limitaciones como déficit en el reporte de seguimiento, elevada heterogeneidad y bajo número de estudios explicarían la muy baja certeza de evidencia. Estudios diagnósticos con mayor rigor metodológico son necesarios en nuestra región.
Child Passenger Safety in Indonesia
Authors: Ariyanto Oos , Noerdajasakti Setiawan , Sulistio Faizin
Published: December 2024

Current Indonesian road safety laws, particularly Law No. 22 of 2009 on Traffic and Road Transport, lack specific provisions for the use of child restraint systems, which significantly reduces child passenger safety. Unlike many developed countries with strict regulations that mandate child-specific safety equipment, Indonesian regulations currently mandate only standard seatbelts designed for adults. This inadequacy poses a substantial risk to children because of their physical vulnerability. This study examines the urgency of specific regulations regarding child safety restraints for child passengers in Indonesia. This research employs a normative legal approach to analyze Indonesia's existing legislation alongside international practices. The findings underscore those countries such as the United States, the United Kingdom, and Australia have effectively lowered child accident rates through mandatory child safety restraints and public awareness campaigns. The study concludes that adopting similar practices in Indonesia could enhance child passenger safety, reduce injury rates, and improve overall road safety for young passengers. The implementation of specific child restraint laws and public awareness initiatives are recommended to ensure comprehensive legal protection for child passengers in Indonesia.
Are Sharia-Labeled Hotels Truly Sharia?
Authors: Dina Arima Nur Rahma , Munfaridah Imroatul
Published: December 2024

The implementation of Sharia principles in the hospitality industry is crucial to meet the growing demand for halal tourism. This study examines the extent to which a Sharia-labelled hotel in Pacitan, Indonesia, applies the guidelines outlined in the DSN-MUI Fatwa No. 108/DSN-MUI/X/2016, focusing on the product, service, and management aspects. Through a qualitative field research approach involving in-depth interviews, participatory observation, and documentation analysis, the study reveals significant gaps between the hotel's Sharia-compliant branding and its actual practices. Notable deficiencies were found in the provision of prayer facilities, cleanliness standards, halal certifications for food and beverages, and adherence to Islamic financial principles. The absence of standard operating procedures to regulate guest behavior and ensure staff compliance with Sharia dress codes further highlights the challenges in aligning operations with Islamic guidelines. These findings underscore the need for a multifaceted approach to address discrepancies, including prioritizing the establishment of essential facilities, comprehensive staff training, and the development of clear operational procedures. At the policy level, this study emphasizes the importance of government support through financial incentives, capacity-building programs, and stricter enforcement mechanisms to ensure consistency and transparency in the use of Sharia-compliant labels. By bridging the gap between branding and practice, Sharia-compliant hotels can enhance their credibility and contribute to sustainable growth of halal tourism in Indonesia.
With a Little Help from my Friends
Authors: Munin Nellie
Published: December 2024

In November 2021, Israel, Jordan, and the United Arab Emirates (UAE) began evaluating the feasibility of an agreement under which Israel would supply Jordan with desalinated drinking water and Jordan would provide Israel with electricity generated by solar systems located in Jordan and built by a UAE company. Since both water and electricity can be produced independently””Jordan can desalinate its own water, and Israel can generate electricity from solar power””the article questions the rationale behind this project. It concludes that the agreement’s foundation, both in terms of engineering and legal structure, is heavily rooted in political and psychological theories of trust building. If successful, this initiative could pave the way for broader regional cooperation and normalization.
Agricultural drought assessment in data-limited arid regions using opensource remotely sensed data: A case study from Jordan
Authors: Al-Kilani Muhammad Rasool , Al-Bakri Jawad , Rahbeh Michel , Knutson Cody , Tadesse Tsegaye , Abdelal Qasem
Published: December 2024

Data availability is a key restriction in drought monitoring, with rainfall-based methods being more widely used despite their shortcomings, primarily due to the lack of observations for other meteorological parameters. This study evaluates open-source remote sensing based meteorological data from the POWER database for agricultural drought assessment in Jordan, where data access is limited, and drought-attributed crop failures are increasingly reported. The results showed strong correlations with ground measurements for precipitation (0.67-0.91) and temperature (>0.99) from POWER. Standardized Precipitation and Standardized Precipitation Evapotranspiration indices (SPI and SPEI) calculated using POWER data showed acceptable mean absolute errors (0.3-0.9) based on gauged measurements from several semiarid sites. During periods of reported crop failures, precipitation was above historical values and SPI indicated wet conditions, while SPEI reflected extreme droughts that supported the reports of local farmers. Correlations between drought patterns produced using POWER and crop yields were significant (P<0.5), this was further supported by pairwise t-tests which demonstrated a significant impact of drought on crop production (P = 0.017). These were consistent with previous agricultural drought assessments done using gauged measurements over drought vulnerable sites in the region. The results of this study suggest the need for revising current protocols relying solely on rainfall for drought assessment. The results also add to the existing body of literature supporting the adoption of SPEI for agricultural drought impact assessment and complementing gauged observations with open-source remote sensing data. Data from POWER seems to be suitable for this purpose under proper technical site-specific evaluations.
A special type hereditary multiple osteochondroma in patients with proximal ulna osteochondroma
Authors: Yan An , Li Miao , Tan Xiaoqian , Tan Qian , Ye Weihua , Wu Jiangyan , Mei Haibo , Zhu Guanghui , Xiao Han
Published: December 2024

Background: Hereditary Multiple Osteochondroma (HMO) is a rare condition that frequently impacts the forearm and results in radial head dislocation. Consequently, orthopedic surgeons prioritize prognostication of factors contributing to radial head dislocation and implementing preventive measures. The purpose of this study was to introduce a specific type of HMO prone to radial head dislocation and provide potential therapeutic strategies for clinical prevention. We retrospectively reviewed the patients with HMO treated in our center between 2010 and 2021. Radiographic measurements included the presence or absence of osteochondromas in the entire forearm, degree of ulnar bow, and ulnar length percent. Patients were separated into 3 groups based on the status of the radial head: located, subluxated, and dislocated. Radiographic measurements were compared using a Brown-Forsythe and welch test with Tamhane’s T2 post-hoc analysis.
Results: A total of 12 patients with 14 forearms were included in the study. Six forearms had the radial head dislocation, while 3 with radial head subluxation and 5 with located radial head at the initial visit. At the final follow-up, all patients with proximal ulnar tumors who did not undergo resection developed subluxation or dislocation. Simultaneously, all patients with proximal tumors exclusively in the radius remained free from subluxation or dislocation of the radial head throughout the follow-up period. The average ulna length percent in Located group was 1.07±0.05, while 1.09±0.03 in Subluxation group and 0.98±0.09 in Dislocated group. The average ulna bow in Located group was 12°±7°, while 9°±6°in Subluxation group and 15°±8°in Dislocated group. There was no significant difference among them.
Conclusions: Osteochondroma of the proximal ulna poses a significant risk factor for radial head dislocation. Consequently, surgical excision of the proximal ulna tumor emerges as a potential therapeutic intervention to mitigate the occurrence of radial head dislocation in affected individuals.