bluuebunny/crossref_metadata_2025 huggingface dataset:
El aprendizaje activo, una estrategia para mejoramiento académico de los estudiantes de ingeniería topográfica y geomática
Authors: Jiménez Cleves Gonzalo , Garzón Barrero Julián , Hurtado Bedoya Carlos Alberto
Published: October 2023

El propósito de este trabajo es dar conocer una estrategia metodológica que, un grupo de profesores, como docentes activos del programa de Ingeniería Topográfica y Geomática de la Universidad del Quindío, vienen implementando desde sus asignaturas, como respuesta a los modelos de aprendizaje que se especifican en el proyecto educativo del programa. La estrategia combina el un porcentaje de clases magistrales (aprendizaje pasivo) con un porcentaje de actividades, que responden a las competencias y al logro de los resultados de aprendizaje esperados de los estudiantes (aprendizaje activo); modelo que permite ir involucrando de forma gradual a los demás docentes, de tal manera que produzca un cambio estructural.
Uso del Toolbox Simulink de Matlab en la enseñanza del cálculo de la disponibilidad programada en un sistema de producción
Authors: Roncancio José
Published: October 2023

Al momento de evaluar las condiciones de operación de un sistema de producción, se debe establecer el factor tiempo, lo cual implica por parte del ingeniero industrial constituir las Disponibilidades Teórica (DT), Efectiva (DE) y Real (DR). Su cálculo involucra una apropiación integral del conocimiento por parte de los ingenieros en formación, para posteriormente usar el Toolbox Simulink de Matlab, que proporciona funciones analíticas, fundadas en una programación robusta, acompañado de una diagramación realizada a través de bloques, que permiten simular los procesos de producción. Lo significativo en este tipo de actividades, radica substancialmente en el sentido que el estudiante debió previamente interiorizar los contextos más esenciales, tener una visión empresarial lógica, real y luego generar las sentencias de programación propias en Matlab, para después realizar un proceso de interpretación adecuado a las lógicas de programación, y del sistema productivo. Las condiciones de programación obtenidas, fueron acordes a los planteamientos matemáticos, generando un modelo potencialmente eficaz a las necesidades del programador.
Innovaciones curriculares para la enseñanza de las ecuaciones diferenciales en ingeniería eléctrica
Authors: Cano Quintero Juan Bernardo , Muñoz Galeano Nicolás , López Lezama Jesús María , Mesa Quintero Noé Alejandro
Published: October 2023

La enseñanza de las Ecuaciones Diferenciales Ordinarias (EDOs) hacen parte del núcleo de formación inicial en ingeniería. Por lo que el aprendizaje de estas, influencia el proceso de adaptación del estudiante y su futuro desempeño o permanencia en el programa. En este artículo se presentan los resultados de la transformación curricular del curso de EDOs para Ingeniería Eléctrica de la Universidad de Antioquia. En este proceso se ha enfatizado en el fortalecimiento de la componente de aplicaciones a la ingeniería, con el objetivo de brindar al estudiante un puente entre la formación matemática inicial y la profesionalizante. Se busca acercar al estudiante a los campos de acción de la ingeniería desde los primeros niveles de formación, mediante la modelación, simulación y práctica, visibilizando la profunda conexión entre las herramientas matemáticas y el quehacer del ingeniero. En particular, se ha implementado una componente de simulación, basada en herramientas de código abierto. El análisis del nivel de aprehensión por parte de los estudiantes se mide mediante una encuesta donde se consulta sobre el método de enseñanza-aprendizaje, el uso de los conceptos del curso de EDOs en el resto de la carrera y el uso de la metodología de estudio desarrollada.
Plan institucional de adecuación a los estándares de calidad: acreditación basada en el modelo centrado en el estudiante de carreras de ingeniería e informática
Authors: Liliam Greiner Cristina , Godoy Guglielmone María Viviana
Published: October 2023

La Ley de Educación Superior en Argentina (Ley Nº 24.521) en su artículo 43 establece que las carreras correspondientes a profesiones reguladas por el Estado, cuyo ejercicio pudiera comprometer el interés público poniendo en riesgo de modo directo la salud, la seguridad, los derechos, los bienes o la formación de los habitantes, deberán ser acreditadas periódicamente, y los planes de estudio deben adecuarse a los estándares de calidad que establezca el Ministerio de Educación de la Nación. Los nuevos estándares instituidos para las carreras de ingeniería e informática requieren que la enseñanza esté centrada en el estudiante y garantice la formación de las competencias de egreso que correspondan al perfil del graduado y a las actividades profesionales reservadas a cada título. En la Facultad de Ciencias Exactas de la Universidad Nacional del Nordeste se dictan tres carreras de ingeniería y una de informática. Para afrontar el proceso de adecuación de los planes de estudio vigentes a los estándares se diseñó un plan institucional, a efectos de guiar el proceso, acompañado de la elaboración de la normativa que lo avala y contribuye a la implementación del mismo. Este contempla la distribución de responsabilidades, la definición de roles y funciones, la capacitación docente orientada a la adecuación de los procesos de enseñanza-aprendizaje, la reorganización del área de acreditación, la sensibilización de los actores involucrados y la definición de un cronograma, permitiendo así contar además con un instrumento de seguimiento del proceso. Una vez aprobada por resolución del Consejo Directivo la metodología de adecuación de los planes de estudio y el cronograma, se puso en marcha inmediatamente, cumpliendo las etapas programadas. Entre las acciones institucionales previstas en la metodología se encuentra el diseño de un nuevo formulario de presentación de programa analítico y planificación de cada espacio curricular, que contemple el modelo de formación basado en competencias y centrado en el estudiante, lo cual involucra la explicitación de los resultados de aprendizajes esperados, la mediación pedagógica, la evaluación y el nivel de aporte a las competencias de egreso. Paralelamente se inició el proceso de autoevaluación tendiente a la acreditación de cada carrera, que implica la recogida sistemática de la información requerida por el sistema, para la emisión de los reportes correspondientes.
Obtención de los parámetros hiperelásticos en algunos modelos de hiperelasticidad mediante métodos numéricos
Authors: Rodríguez Rengifo Stephany , Rodríguez Piedrahíta Juan Sebastián , Madera Sierra Ingrid Elizabeth , Suárez Castro Brian
Published: October 2023

Los aisladores sísmicos son una herramienta útil a la hora de construir estructuras más resilientes y seguras en la actualidad. Los aisladores convencionales suelen construirse con matrices de caucho natural, esto genera que su producción sea costosa y poco amigable con el medioambiente. Debido a esto surgen ideas como la reutilización de llantas usadas para la construcción de las matrices de caucho reciclado. En el desarrollo de este nuevo producto es de gran importancia la caracterización mecánica de su matriz para esto la obtención de parámetros hiperelásticos y viscoelásticos es importante en el desarrollo de aisladores sísmicos de base. Estos parámetros permiten predecir el comportamiento mecánico de los elementos a la hora de ser sometidos a un evento sísmico, así como al momento de operación, históricamente se han usado modelos constitutivos como el Polinomial simplificado, Yeoh, y Ogden, entre otros para describir el comportamiento hiperelástico. Estos comportamientos son paramétricos y pueden obtenerse mediante experimentación como ensayos a tensión y compresión uniaxial para hiperelasticidad. Este trabajo pretende caracterizar los parámetros hiperelásticos de la matriz de aisladores de caucho reciclado mediante pruebas de compresión y tensión uniaxial.
Aportes de la Ingeniería para la caracterización en salud ambiental. Caso de Estudio en el eje cafetero colombiano
Authors: Ocampo Olga , González Pérez Tatiana
Published: October 2023

Múltiples y complejas interrelaciones contribuyen a la calidad de la salud incluyendo determinantes ambientales, políticos, económicos, sociales y culturales. En salud humana, los determinantes ambientales son fundamentales porque determinan el status de salud en las poblaciones. Para mejorar la salud, acciones estructurales e integrales deben enfocarse en los factores determinantes que generan los riesgos ambientales. Por tanto, para comprender las relaciones y sus influencias en la salud humana, es necesario analizar situaciones a nivel municipal, subregional y departamental. Identificar las condiciones ambientales del territorio permite comprender factores de riesgo en el contexto de la salud ambiental y establecer intervenciones focalizadas. A través del análisis de fuentes secundarias se realizó una investigación ecológica en cinco departamentos de la región Central de Colombia, con el fin de caracterizar el estado de salud ambiental mediante indicadores a escala municipal. El modelo de fuerzas motrices que identifica una relación causal entre la salud y el medio ambiente fue empleado. En el sector salud, el MFM permite establecer una intervención transversal para cada una de las seis categorías o niveles que lo componen: 1. Fuerza motriz, 2. Presión, 3. Estado, 4. Exposición, 5. Efecto y, 6. Acción. Los componentes calidad de agua, aire, saneamiento básico y seguridad química fueron caracterizados basados en contaminantes criterio e indicadores establecidos por la reglamentación colombiana, la Organización Mundial de la Salud (OMS) y las agencias internacionales reconocidas como Enviromental Protection Agency (EPA). El análisis integrado con herramientas de ingeniería apoyadas en sistemas de información geográfica y analítica de datos contribuye con la priorización de acciones e intervenciones para la toma de decisiones en salud ambiental, con base en la evidencia disponible.
El uso de las TIC en la enseñanza de la física mecánica
Authors: Girón Palacio Mitchel Alexander , Torres Ana María
Published: October 2023

El aprendizaje de la física en la ingeniería suele dificultarse en la comprensión de conceptos fundamentales, por lo cual el uso de las nuevas tecnologías ha traído beneficios importantes en su enseñanza, una herramienta de ellas, que se ha usado desde hace algunos años es el programa computacional gratuito Tracker que se basa en el seguimiento de la trayectoria de un cuerpo en función del tiempo de videos tomados por los estudiantes interesados en su análisis mecánico; con él, se pueden determinar diferentes características como velocidad, aceleración, fuerza, energía, … Se mostrará por lo tanto cómo mediante su uso en prácticas de laboratorio en las cuales se grabaron los movimientos de diferentes cuerpos (embarcación a escala, caída de una bola de goma y colisión de dos deslizadores en un riel de aire), en los que se obtuvieron la velocidad, aceleración y momento lineal con una buena aproximación de los valores teóricos a partir de ajustes gráficos; con esta metodología se ha observado que se permite a los estudiantes experimentar y explorar conceptos científicos y de una manera más visual y práctica, y también hace que la enseñanza sea más interactiva y atractiva, haciendo que el aprendizaje de la física y la matemática usada sea más significativa.
Índices de calidad del agua residual para la evaluación integral de efluentes del proceso de lixiviación de oro con cianuro en el departamento de Caldas
Authors: Gaviria López Guillermo Humberto , Dobrosz Gómez Izabela , Gómez García Miguel Ángel
Published: October 2023

Los índices de calidad del agua (ICA) nacen como instrumentos para simplificar la manera en la que se valora la calidad del recurso hídrico, condensando los parámetros fisicoquímicos de calidad del agua en forma compacta a través de un número, un intervalo o una categoría descriptiva. Además de los ICA se han desarrollado, aunque con menos difusión, los Índices de Calidad de Agua Residual (ICAR). Estos han sido aplicados a la valoración de efluentes de diferentes tipos de industrias y pueden ser empleados como herramienta de monitoreo y gestión del impacto de las aguas residuales sobre el recurso hídrico. Es así como se propuso la formulación de un ICAR basado en la normativa ambiental colombiana. Para calcular el ICAR se empleó el método del índice aritmético ponderado tomando como referencia los parámetros de la Resolución 0631 del 2015 del Ministerio de Ambiente y Desarrollo Sostenible y sus valores máximos permisibles en los vertimientos puntuales a cuerpos de agua superficiales a los sistemas de alcantarillado público. Como caso de estudio se consideró el departamento de Caldas debido a la vocación minera de algunos de sus municipios. En él se extrae oro principalmente en los municipios de Marmato y Manizales. El departamento aportó ca. 5% de la producción total de oro del país en el 2020. La extracción de oro se hace a través de grandes proyectos mineros y minería artesanal (entables). La minería afecta la calidad del agua por la descarga de lodo de roca estéril molida, efluentes con cianuro y altas cargas de metales disueltos. En este trabajo, se calculó el ICAR teniendo en cuenta los 23 parámetros fisicoquímicos que tienen establecido un valor máximo permisible en la normativa ambiental vigente (T, pH, DQO, DBO5, SST, SSED, Grasas y Aceites, Fenoles, HTP, CN–, Cl–, SO42–, S2–, As, Cd, Zn, Cu, Cr, Fe, Hg, Ni, Ag, Pb) con base en un método de índice aritmético ponderado. Se emplearon los valores promedio de seis muestreos de efluentes de diferentes entables mineros del departamento de Caldas que realizan lixiviación de oro con cianuro. Se obtuvo un ICAR de 828.06, el cual indica una calidad muy mala del efluente. Esto exhorta a buscar alternativas de tratamiento que tengan en cuenta las características de los efluentes del departamento. Finalmente, el ICAR ha permitido evaluar integralmente la calidad del agua y planear acciones de mitigación. Además, constituye en sí mismo una herramienta para valorar el impacto integral de las acciones de atenuación de la contaminación.
Análisis cronológico de pórticos planos controlados con disipadores de fricción
Authors: Bernal Álvarez Mateo , Espinosa Martínez Juan Esteban , Rodríguez Rengifo Stephany , Quintero Méndez Cristian Duván , Cundumí Sánchez Orlando
Published: October 2023

Durante la última década, el concepto de sistemas de control ha sido considerado como una alternativa en el diseño sismo resistente de estructuras, especialmente en aquellos casos en que se busca un mejor desempeño sísmico. Diferentes investigadores han desarrollado proyectos con el fin de encontrar distintos tipos de medidas, dispositivos, y mecanismos para modificar la respuesta dinámica del sistema estructural sometido a cargas variables en el tiempo, e.g., terremotos. Basándose en estos esfuerzos han surgido una serie de dispositivos, conocidos colectivamente como sistemas de control sísmico los cuales se dividen en: pasivos, activos o semi- activos. Los sistemas pasivos disipan la energía por medio de la fricción, fluidos viscosos, el comportamiento de histéresis del material, entre otros casos. Por otro lado, los sistemas de control activo pueden ser producidos por la aplicación de fuerzas variables en el tiempo de manera de contrarrestar las impuestas por la excitación de la modificación de la rigidez o la adición de amortiguamiento adicional a las estructuras. Los sistemas de control semiactivo combinan las características de los sistemas activos y pasivos con el objetivo de modificar el comportamiento de la estructura. Para obtener la respuesta de la edificación controlada con sistemas pasivos o semiactivos, se requiere de un algoritmo de control. En esta investigación se analiza el efecto de los sismos en el comportamiento de estructuras controladas por un sistema de control pasivo tipo fluido viscoso. Para obtener la respuesta dinámica (desplazamiento y aceleración) de la estructura se realizaron simulaciones en pórticos planos de 3, 4, 6 y 7 pisos, los cuales fueron sometidos a la componente horizontal en la base de los terremotos de ChiChi, Friulli, Hollist, El Centro, Kobe, Kocaeli y Landers, estos registros sísmicos son sometidos previamente al proceso de macheo (Spectral Matching) para que sean compactibles con un espectro obtenido con el Reglamento Colombiano de Diseño Sismorresistente NSR 10. Finalmente, los resultados son comparados con los obtenidos para las respuestas de las estructuras sin controlar.
Peptide derived from SLAMF1 prevents TLR4-mediated inflammation in vitro and in vivo
Authors: Nilsen Kaja Elisabeth , Zhang Boyao , Skjesol Astrid , Ryan Liv , Vagle Hilde , Bøe Maren Helene , Orning Pontus , Kim Hera , Bakke Siril Skaret , Elamurugan Kirusika , Mestvedt Ingvild Bergdal , Stenvik Jørgen , Husebye Harald , Lien Egil , Espevik Terje , Yurchenko Maria
Published: October 2023

Inflammation plays a crucial role in the development and progression of many diseases, and is often caused by dysregulation of signalling from pattern recognition receptors, such as TLRs. Inhibition of key protein–protein interactions is an attractive target for treating inflammation. Recently, we demonstrated that the signalling lymphocyte activation molecule family 1 (SLAMF1) positively regulates signalling downstream of TLR4 and identified the interaction interface between SLAMF1 and the TLR4 adaptor protein TRIF-related adapter molecule (TRAM). Based on these findings, we developed a SLAMF1-derived peptide, P7, which is linked to a cell-penetrating peptide for intracellular delivery. We found that P7 peptide inhibits the expression and secretion of IFNβ and pro-inflammatory cytokines (TNF, IL-1β, IL-6) induced by TLR4, and prevents death in mice subjected to LPS shock. The mechanism of action of P7 peptide is based on interference with several intracellular protein–protein interactions, including TRAM–SLAMF1, TRAM–Rab11FIP2, and TIRAP–MyD88 interactions. Overall, P7 peptide has a unique mode of action and demonstrates high efficacy in inhibiting TLR4-mediated signalling in vitro and in vivo.
Causal links of α-thalassemia indices and cardiometabolic traits and diabetes: MR study
Authors: Hsu Lung-An , Wu Semon , Teng Ming-Sheng , Ko Yu-Lin
Published: October 2023

Our study aimed to investigate if genetic variants around 16p13.3’sHBA1locus, associated with erythrocyte indices and HbA1c levels, predict α-thalassemia-related erythrocyte indices, cardiometabolic traits, and diabetes risk in Taiwanese individuals. We analyzed Taiwan Biobank data, including whole-genome sequencing from 1,493 participants and genotyping arrays from 129,542 individuals. First, we performed regional association analysis using whole-genome sequencing data to identify genetic variants significantly associated with erythrocyte indices, confirming their linkage disequilibrium with the α0thalassemia --SEAdeletion mutation, a common cause of α-thalassemia in Southeast Asian populations. Deletion mutation sequencing further validated these variants’ association with α-thalassemia. Subsequently, we analyzed genotyping array data, revealing associations between specific genetic variants and cardiometabolic traits, including lipid profiles, HbA1c levels, bilirubin levels, and diabetes risk. Using Mendelian randomization, we established causal relationships between α-thalassemia-related erythrocyte indices and cardiometabolic traits, elucidating their role in diabetes susceptibility. Our findings highlight genetic variants around the α-globin genes as surrogate markers for common α-thalassemia mutations in Taiwan, emphasizing the causal links between α-thalassemia-related erythrocyte indices, cardiometabolic traits, and heightened diabetes risk.
Climate as a factor in the modern relief formation of the northeastern macroslope of Chornohora
Authors: Kostiv L. Ya. , Shuber P. M. , Burianyk O. O. , Karabiniuk M. M.
Published: October 2023

Purpose. To analyze climatic indicators that cause the formation and development of a wide range of geomorphological processes, including dangerous or catastrophic ones.

Methods. Statistical, system analysis.

Results. The research was based on the analysis of a number of climatic indicators (amount and intensity of precipitation, air and soil temperature, thickness of snow cover and water reserves in it) of the Pozhyzhevska snow avalanche station and the Laboratory of Landscape Monitoring of the Chornohora Geographical Station of the Ivan Franko National University of Lviv, which represent different oroclimatic zones.As a result of the study, the climatic indicators influencing the formation of modern relief processes of the northeastern slope of Chornohora were mainly established, and their heterogeneity in the different natural territorial complexes was characterized. Particular attention is paid to the processes of physical weathering, which are quite widespread and form the material for the further development of erosion and gravity processes. Their development is determined by significant temperature amplitudes and temperature transitions through 0°C. It has been established that an the Chornohora Geographical Station, daily air temperature amplitudes above 10°C are characteristic of 2/3 of the days of the warm period, above 15°C - on a third of the days, above 20°C in some cases, with a maximum value of 25.2°C. The daily amplitudes of temperature on the open soil surface above 20°C were recorded on half of the days of the warm period with repeated exceeding of 30°C. With depth, these indicators in the soil are smoothed out, but are still noticeable at a depth of 20 cm. The transition of the air temperature through 0°C (also one of the factors of defluxation) to the Chornohora Geographical Station was recorded on average on 98 days per year (including 38 in the snowless period). The amount and intensity of precipitation affecting the development of erosion processes, the formation of floods, mudflows, avalanches, and indirectly landslides and landslides.

Conclusions. It has been found that the main climatic indicators that cause the formation and development of various geomorphological processes are precipitation, temperature, and snow cover thickness.
The reclamation of the surface layer of mining landscapes of Kryvyi Rih landscape technical system
Authors: Koptieva T. S.
Published: October 2023

Purpose. To investigate the reclamation of the surface layer of mining landscapes of Kryvyi Rih landscape technical system on the example of Shymaniv and Hanniv dumps. Methods. Historical analysis, comparative, cartographic, method of anthropogenic landscape forecasting. Results. It has been determined that Shymaniv dump was created by the Southern Mining and Processing Plant in 1960–1967, belongs to mixed dumps, was formed by automobile tailings resulted into tiers with a leveled and plateau-like surface. The dump in the geological structure has a lower accumulative microstrip, which consists of crystalline rocks that are not involved into development, limestones, loess-like loams; the middle accumulative – denudation microstrip, which is characterized by crushed stone, sand, stone blocks and the upper denudation microstrip, which is represented by blocks and granites. The dump reclaimed and has favorable conditions for the germination of vegetation. By example of the Hanniv dump the possibility of rational use of the surface layer of mining landscapes was considered. The Hanniv dump is a mixed dump with its height of 90 m, partially reclaimed. A gradual biological reclamation technology is proposed for the rapid adaptation of plants to unusual terrain and the improvement of disturbed lands. Maps and technology of biological reclamation have been developed, which reflect the surface layer of mining landscapes of Kryvyi Rih landscape technical system. Conclusions. The reclamation of the surface layer of mining landscapes of Kryvyi Rih landscape technical system exists and needs a detailed study in order to prevent the degradation of disturbed lands due to the action of the mining industry. On the example of Shymaniv and Hanniv dumps the reclamation of the surface layer of mining landscapes has been investigated, the history of the dumps has been determined, the geological - geomorphological, hydrological, climatic, soil - biotic processes that influenced the favorable formation of the reclamation of the surface layer of the dumps have been substantiated, and a gradual biological reclamation technology has been proposed on the example of Hanniv dump.
Prospects for the application of battery energy storage systems in NPP auxiliary power supply systems
Authors: Karchin V. V. , Meldin I. V. , Pitev A. N.
Published: October 2023

One of the characteristics of energy strategy, which currently implementing is atomic energy elaboration and NPP development with rising part of atomic generation in national energy system. Of course one of the most important property of atomic generation is safety (Chernobyl, Three Mile Island, Fukushima Daiichi accidents). To maintain the operation of security systems in conditions of loss of external power supply, autonomous power sources - diesel-generator sets are used, but their use is associated with a number of difficulties of operation and maintenance, and currently developing technologies allow to realize new processes of energy transformation. And on the other hand modern technologies are providing access to new energy saving technologies. In this article we will try to compare energy storage systems, which use different physical principles and try to review their advantages and particularities. Also we especially explore operational advantages of battery energy storage systems and their influence on atomic safety and maintenance cycles and also integrating to digital control system and more effective generation and flexibility during NPP operation with conclusion about new business for «Rosatom» company.
A method of describing a modular information and measurement system based on the CANopen protocol, taking into account intermodule information links
Authors: Plotnikov D. A. , Muzhenko A. S. , Lachin V. I.
Published: October 2023

Modern information and measuring and control systems (IMCS) usually have a modular structure. Convenient means of organizing intermodule interaction are the CAN interfaces (CAN FD) and the CANopen protocol. The standard tools provided by the CANopen specification are focused on the description of individual modules and do not ensure the integrity and consistency of the IMCS configuration as a whole. This article discusses the causes of possible configuration errors and suggests a method for describing the IMCS based on the CANopen protocol, which ensures consistent configuration of the system modules. The goal is achieved by supplementing the standard description of modules with an explicit description of the messages transmitted by modules to each other, indicating the source, receivers and a list of parameters. A scheme of information flows in a modular IMCS is developed, a general structure of the system description is proposed, including module parameters and message parameters. Data structures describing modules and messages are considered in detail, special attention is paid to ensuring the integrity of intermodule information links. It is shown that the proposed method makes it possible to detect or exclude configuration errors such as messages without a source or without recipients, duplication of parameter transmission, an attempt to transmit a non-existent parameter, the absence of transmission of some parameters, the absence of a source for the received parameter. The use of the XML language for the implementation of the IMCS description method is proposed, which provides automatic verification of the system configuration by standard language means based on the document schema. It is noted that the use of the method in the modeling and configuration program of the modular vibration monitoring system provided the identification of errors of inconsistent or incomplete configuration of individual modules at the earliest stages of design.
Digital acoustic model of an NPP pressurizer with WWER
Authors: Proskuryakov K. N. , Khvostova M. S. , Ismail R. M. , Yakovlev K. A.
Published: October 2023

It is experimentally proven that the main cause of vibration excitation of equipment and internals of the main circulation circuit (MCC) are acoustic standing waves (ASW) and main circulation pumps (MCP). Usage of an interdisciplinary approach made it possible to create a digital acoustic model of pressurizer system with pipelines attached to it and prove that it is a self-oscillating system capable of generating acoustic standing waves (ASW) similar to simultaneous operation of several Helmholtz resonators. Each Helmholtz resonator in pressurizer is able to suppress a certain frequency of ASW generated by the reactor, which depends on coolant temperature. Determination of natural frequencies of coolant pressure oscillations (NFCPO) in pressurizer using Thomson formula is based on method of electroacoustic analogy. Acoustic compliance of pressurizer and acoustic mass of various combinations of pipelines connected to it make it possible to calculate NFCPO, in the system under consideration, according to the formula presented in the form of acoustic analogues of inductance and capacitance. Acoustic parameters of a system of Helmholtz resonators formed by a pressurizer and a connecting pipeline with hot leg of the third loop in nominal operating mode of NPP with WWER-1000 are calculated. A technology has been developed and verified, advantage of which is usage of a pressurizer for damping ASW, frequencies of which fall within vibration bandwidth of primary circuit structural elements. Calculation and experimental proof of previously unknown ability of pressurizer to damp ASW generated by the reactor in a wide frequency range is given, and possibility of preventing resonances with vibrations of equipment and NPP structures is substantiated.
Improvement of methods for analyzing the technical condition of electromechanical equipment of nuclear power plants
Authors: Abidova E. A.
Published: October 2023

The article analyzes the problem of diagnostics of NPP electric drive valves. Failure of this type of equipment can become the initial event for design or beyond design accident. Therefore, during the period of preventive maintenance at NPPs diagnostics of up to 2000 units of valves is carried out mainly by registration and analysis of the motor current signal during opening and closing. However, the applied statistical and frequency analysis methods do not always provide the necessary quality of diagnostics. The article points out the disadvantage of the applied methods – insensitivity to the dynamics of electromechanical equipment in terms of nonlinear manifestations of defects. As a tool for analyzing these manifestations the phase-plane method is proposed and its theoretical basis is outlined. The diagnostic signal is described as a vector diagram of a harmonic series subjected to amplitude and phase modulation. The most characteristic forms of phase trajectories - cardioids, nephroids, epicycloids – are shown. The main advantages of the phase-plane method over traditional frequency methods – sensitivity, possibility to identify the type of modulation, phase shift, dynamic and chaotic manifestations – are demonstrated by examples of processing diagnostic signals of NPP equipment. An important advantage of signal representation in the form of phase portrait is the visualization of dynamic features of the signal. The result of the work is a new method that allows to extract additional information about the object state by analyzing the non-stationary component of the initial data. It is proposed to introduce the phase-plane method into the practice of processing diagnostic signals of electric drive valves and other electromechanical equipment operated at NPPs.
Verification of the WWER-1200 reactor dynamic model consisting of one-fuel unit adjacent to two coolant units
Authors: Pravosud S. S. , Maslakov D. S. , Yakubov Ya. O. , Ovcherenko A. A.
Published: October 2023

As modern control systems engineering imposes limits on mathematical models of control objects, further development, and verification of the mathematical models suitable for power control system synthesis of nuclear power facilities is an ongoing problem. This article deals with the low-order dynamics model with lumped parameters of the Russian-designed pressurized water reactor, as well as its verification with experimental data from the full-size simulator of the WWER – 1200 nuclear reactor within two tests related to changing the position of Group 12 of CPS CR and changing the inlet coolant temperature. This model was created as a MATLAB S-function lv.2 model because of its capability to handle any type of signal.  Within this approach, the equation describing the coolant heating process is represented as a «two well-stirred tanks in series» model. The article demonstrates the upside of the given approach in comparison with the conventional approach, where the average temperature of the coolant is determined as an arithmetic mean of inlet and outlet coolant temperatures, respectively, on the basis of the test with a sudden change of the reactor inlet coolant temperature. In the frequency domain, the authors carry out stability analyses of the given model in a state-space form in relation to different external disturbances. Conclusions about the suitability of the given model as a fifth-order control object for parametric synthesis of a controller for the power control system of a nuclear power facility are drawn.
Study of causes and possible solutions to the problem of specialist shortage in the Russian energy industry with the involvement of HR-branding
Authors: Bondarenko V. A. , Popova T. S. , Popov A. A.
Published: October 2023

This paper aims to identify the problems that mediate the shortage of specialists in the energy sector in Russia. The article analyzes the situation related to the insufficient popularity of engineering education among applicants, which leads to the risk of under-enrollment of students by universities within the budget enrollment control figures, which mediates difficulties in providing the quantitative parameter of the required specialists. Reduction of points for admission to technical profiles by universities leads to the attraction of applicants who do not demonstrate a conscious choice of future profession and, with a high probability, may refuse to work in their specialty, which is demonstrated by the presence in the energy sector of only 23% of specialists under 35 years of age, which is below the national average. As a result of the study it was determined that in the course of joint efforts of the state, universities and energy companies themselves to attract young people to engineering profession and work in the energy sector, the most active role should belong to employers. In this regard, the authors consider the expediency of using HR-branding in the format of expanding the target audience of potential employees of energy companies with the inclusion of preschoolers, schoolchildren and students to whom material and moral value proposition is made. Expanding the audience of the HR-brand of the company to preschoolers, schoolchildren and students, applying real moral and material motivators for them will contribute to the growth of popularity of this area of training and conscious choice of profession, which, in the long term, will solve the issue of the shortage of qualified personnel in the energy sector of Russia.
The Impact of Training on Improving Employee Performance: A Case Study on Employees in the Directorate of Education of Ma'an District
Authors: Khawaldeh Essam Deep Al
Published: October 2023

Purpose: The aim of this study is to determine the impact of training on improving the performance of workers in Maan's Directorate of Education.
 
Theoretical framework: This study will focus on finding a cognitive dimension that contributes to clarifying the concept of training and its dimensions (type of training, training period, trainers) and its impact on the job performance of employees.
 
Design/Methodology/Approach: The descriptive analytical approach was used in the study. The study sample included 34 male and female employees; 40% of the study population. The data was collected using a questionnaire designed by the researcher after its validity and reliability have been tested. The questionnaire contained (27) items distributed across the following dimensions: training quality (7) items, training duration (6) items, trainers (7) items, and performance (7) items.
 
Findings: The results of the simple regression analysis revealed that overall training has a moderate effect on improving worker performance. Furthermore, the results of the multiple regression analysis revealed that there is a statistically significant effect in improving worker job performance due to the trainers’ dimension, but no effect in improving performance through the other two dimensions (quality training, duration of training). The results also revealed that there were no statistically significant differences in the responses of the study sample based on gender.
 
Research, Practical & Social implications: The study helps the directorate of education of Ma’an District to understandthe impact of training on improving employee performance. It will also help the employees realize the effect of training on their performance.
 
Originality/Value: The value of the study is represented in being the first study to be applied on the employees of Ma’an District. Therefore, it is a contribution to to the Human Resource/Training Department to understand the impact of training on improving employee performance.
Smart Learning in Virtual Worlds: A Systematic Literature Review on the Usage and Applications of Metaverse in Education
Authors: Pari-Bedoya Ilda Nadia Monica de la Asuncion , Vargas-Murillo Alfonso Renato , Palacios Ricardo Jimenez , Guevara-Soto Francisco de Jesús , Ypanaque-Pereira Isai Luis
Published: October 2023

Interactive digital applications have made their way into the educational field. Since the COVID-19 pandemic, numerous countries have resorted to various platforms to reinvent teaching methodology in the digital era. One of these platforms is the metaverse, which presents itself as a resourceful way to teach in the future, with potential applications such as digital interaction among peers. It further offers more dynamic and immersive learning, as students can engage in virtual simulations, role-playing activities, and collaborative projects with other students globally. In an era of constant technological advancement, studying the metaverse and its applications in the educational field seems like a valid starting point to enrich the current teaching methodologies and those of the future. It is an acknowledgement of its impact on education, its usage, challenges and advancements, as well as its influence on the future of education. Therefore, this paper’s objective is to gather and analyse the current literature available relating to the application of the metaverse in the field of education. A systematic literature review (SLR) was conducted across the journal databases of IEEE Xplore, Scopus, ProQuest, ScienceDirect and ACM Digital Library. A total of 31 articles were reviewed according to criteria. The results of this SLR determined that, while research shows the significant potential regarding the usage of the metaverse in education, a set of concrete applications has yet to be investigated thoroughly in order to exploit this technology’s immense potential fully in the field of education.
«Como son obligados de inmemorial tiempo a esta parte»: Una historia de larga duración de los comunales en las aldeas de Casaio y Lardeira (siglos X-XVIII)
Authors: Barros Alfaro Lara , Tejerizo Carlos , Escudero Manzano Gonzalo J.
Published: October 2023

Since Elinor Ostrom's seminal works in the 90s the analysis on the common lands has had a great development, which have favored complex historical approaches and, more recently, archaeological ones. However, fewer are the studies which tackle the long duration of these common lands, addressing not only their historical origins but also their transformation regarding different historical contexts. In this paper, from a multidisciplinary perspective that includes the analyses of the documentary, archaeological and ethnographical evidence, we will delve into the history of the common lands at the villages of Casaio and Lardeira (Ourense, Galicia). Hence the social, economic and political factors which have influenced the configuration of these spaces as well as the uses and practices exerted on them will be explored. In conclusion, we will value the analyses of conflicts and agencies as the best path to understand the complexities of common lands from a long duration perspective.
Capacidad cardiorrespiratoria en pacientes con fibromialgia: revisión sistemática y metaanálisis
Authors: Rivas Plazas Andrea del Pilar , González Cetina Nelson Fernelly , Arango Luque Adriana
Published: October 2023

Introducción. La fibromialgia es una enfermedad crónica caracterizada por dolor musculoesquelético generalizado que puede producir deterioro en la capacidad cardiorrespiratoria; sin embargo, hasta la fecha no está claro cuál es el compromiso cardiorrespiratorio en los pacientes con esta condición.
Objetivos. Determinar la capacidad cardiorrespiratoria de los pacientes con fibromialgia y analizar las diferencias con controles sanos.
Métodos. Se realizó una búsqueda sistemática en las bases de datos PubMed, Web of Science, ScienceDirect, Redalyc, Scopus, Lilacs y Google Scholar. Se incluyeron estudios observacionales publicados en inglés, español y portugués que evaluaran la capacidad cardiorrespiratoria en pacientes con fibromialgia en comparación con sujetos sanos. La calidad metodológica se evaluó mediante la escala Newcastle-Ottawa. Bajo un modelo de efectos aleatorios, el tamaño del efecto combinado se calculó con la diferencia de medias estandarizadas y su intervalo de confianza del 95%; la heterogeneidad se analizó mediante la prueba I-cuadrado (I2). Se realizó análisis de subgrupos para evaluar la influenciadel tipo de prueba de ejercicio clínica utilizada.
Resultados. Se incluyeron 14 estudios, con un total de 1.623 participantes (todos de sexo femenino), que cumplieron los criterios de inclusión. Se encontró una diferencia significativa en la distancia recorrida en la prueba de la caminata de seis minutos en mujeres con fibromialgia en comparación con mujeres sanas. Los estudios con ergoespirometría presentaron resultados no concluyentes.
Conclusiones. Los pacientes con fibromialgia presentan una menor capacidad cardiorrespiratoria en la prueba de la caminata de seis minutos en comparación con los controles sanos. En este sentido, se necesitan investigaciones que permitan establecer métodos adecuados de medición de la aptitud cardiorrespiratoria que tengan en cuenta las condiciones particulares de los pacientes con esta enfermedad.
STAGES OF AN ADULT HERO’S JOURNEY AS A REPRESENTATION OF ANIMA INTEGRATION: ON THE EXAMPLE OF “THE MATRIX RESURRECTIONS”
Authors:   St. Petersburg State Institute of Cinema and Television, Efimova Irina A.
Published: October 2023

The article analyzes the features of the passage of the stages of the Monomyth by a Hero with a midlife crisis. The author compares the classical stages of J. Campbell's Monomyth and the needs of the psyche of a mature man, derived by C.G. Jung in the study Archetypes and the Collective unconscious. The material for the analysis is the last film of the film franchise “The Matrix” (1999-2021), the main character of which has already realized the stages of the Monomyth in the previous parts and in “The Matrix Resurrections” (directed by L. Wachowski, 2021) found himself in a midlife crisis. When analyzing the film, the basic component for this structure was determined – the integration of the Anima archetype, which is the most important for the psychology of this age group. Significant differences from the classic Monomyth are also the increased timing of the first Act, due to several refusals of the hero from the “call” and the fear of leaving his “ordinary world”, non-classical images of the Goddess, the Woman as a temptress, a decrease in the function of the Father archetype and a specific way of interacting with the Shadow.
Design of Fullerene20-thieno[2,3-c]pyrrole-4,6(5H)-dione-fullerene20 for Opto-nonlinear applications: Quantum Mechanical Study
Authors: Resan S. , Al-Anber M.
Published: October 2023

Background:

Many organic compounds are studied because of their nonlinear optical properties, which are crucial in photonics, optical switches, modulators, optical data storage, and other devices that use light to transport information. In experimental and theoretical researches, nonlinear optical phenomena, primarily resulting from interactions between matter and strong electric fields, have received considerable attention. Materials like these have numerous applications in science, engineering, and technology.

Materials and Methods: Fullerene 20 has been adopted as an electron donor, which was considered an NLO molecular material, while the thieno[2,3-c]pyrrole-4,6(5H)-dione has been adopted as an electron acceptor. Fullerene20-thieno[2,3-c]pyrrole-4,6(5H)-dione-fullerene20 (FTPDF), as D-A-D, has been designed for nonlinear optical applications. Fullerene20-thieno[2,3-c]pyrrole-4,6(5H)-dione-fullerene20 (FTPDF) was studied to determine its linear and nonlinear optical properties. For FTPDF, nonlinear optical properties were calculated with DFT/B3LYP using the basis set 6-31G(d,p). Various quantum calculations determine the structural and symmetry properties of Fullerene20-thieno[2،3-c]pyrrole-4،6(5H)-dione-fullerene20.

Results: The rotation increases the electric dipole moment µtot, average linear polarizability αo and the first hyperpolarizability βtot. And the anisotropic polarizability ∆α is smaller than the average polarizability, and the present structure has few deviations from spherical symmetry. FTPDF shows µx-switch behavior. In particular, the rotation can raise the possibility for a new type of molecular βx-switch.

Conclusion: The Highest Occupied Molecular Orbital (HOMO) and the Lowest Unoccupied Molecular Orbital (LUMO) energies estimated by DFT for the investigated molecules have been reported here. Fullerene20-thieno[2,3-c]pyrrole-4,6(5H)-dione-fullerene20 has an increased first hyperpolarizability, making it a novel material suitable for the development of optoelectronic devices.
Dimensional Accuracy and Tearing Strength of Alginate Impression Material Containing Different Concentrations of Natural Miswak Powder: An In-Vitro Study
Authors: Kakai Ribaz Tahsin Hayas , Ameen Ahmed Saleh Hamad
Published: October 2023

Background:

Alginate impression material is an irreversible hydrocolloid due to its chemical setting reaction. Hydrocolloids dimensional stability depends on the presence of water, as water makes up around 70% of dental alginate. One of the Salvadoraceae families, Salvadora persica, is the source of miswak. The Arak tree, or Salvadora persica, is often referred to as the "toothbrush tree" as it is known in English. It is evergreen form develops like a shrub or small tree with a twisted trunk. The researchers mixed miswak powder with the alginate to examine the dimensional accuracy and tearing strength.

Materials and Methods:

Sixty alginate specimens were prepared. 30 specimens for dimensional accuracy and 30 specimens for tearing strength, each of them is divided into three groups: The control group, Group A % 17 miswak powder, and Group B % 34 miswak powder. The dimensional stability and tearing strength were tested.

Results:

There is no dimensional change in group B, lesser dimensional change was revealed in group A, according to control group. Group B is more resistant to tearing strength when compared with the control group and group A, and group A is more resistant than the control group.

Conclusion:

Adding a suitable amount of miswak powder to alginate is beneficial for reducing and preventing shrinkage, as well as improving tearing strength.