bluuebunny/crossref_metadata_2025 huggingface dataset:
Problematización de los hábitos alimentiarios con relación al rendimiento escolar de los estudiantes de 9B y 9C del colegio CAFAM
Authors: Acosta Celis Karen Sofía
Published: August 2023

Este proyecto de investigación pretendió, en sentido amplio, problematizar los hábitos alimenticios que poseen los estudiantes, reconocer la incidencia de los hábitos alimenticios sobre su rendimiento escolar y promover en ellos la adquisición de buenos hábitos alimenticios. Para ello se implementó el uso de significados, descripciones y definiciones situadas en un contexto con el fin de que los datos obtenidos de las diferentes actividades propuestas para el desarrollo de la investigación puedan ser expresados de manera pedagógica para suscitar una reflexión por parte del maestro en formación y de los estudiantes. El ejercicio de socialización permitió que los estudiantes compartieran sus estilos de vida en sentido alimentario, además de algunos aspectos con los que se encuentran relacionados en la institución y que influyen en gran medida sobre la forma como se alimentan en el transcurso de la jornada. Con el uso de significados, descripciones y definiciones situadas en un contexto, es posible; en este caso, que los datos obtenidos de las diferentes actividades propuestas para el desarrollo de la investigación puedan ser expresados de manera pedagógica para suscitar una reflexión por parte del maestro en formación y de los estudiantes acerca de los hábitos alimenticios, el rendimiento escolar y la manera en cómo estos dos factores influyen en la singularidad de los diferentes sujetos. Para el abordaje de las diferentes temáticas se plantean 3 fases que responden de manera general a cada uno de los objetivos propuestos para la investigación; así pues, el ejercicio de socialización permitió que los estudiantes pudieran compartir sus estilos de vida en sentido alimentario además de algunos aspectos con los que se encuentran relacionados en la institución y que influyen en gran medida sobre la forma como se alimentan en el trascurso de la jornada.
Una propuesta de aula desde los ODS: los bioplástico desde una perspectiva CTSA
Authors: García Viviescas Aura Ximena , Moreno Sacristán Yineth Alejandra
Published: August 2023

Este artículo evidencia la formulación y construcción de una propuesta de aula desarrollada bajo la perspectiva CTSA, con el fin de brindar herramientas teóricas y prácticas en el fortalecimiento de ciudades sostenibles, en el Colegio San Nicolás de Tolentino (Bogotá, Colombia), a partir del análisis de una problemática ambiental del contexto relacionada con la producción y manejo de residuos sólidos. En la fase metodológica presentada en este artículo, se destaca el enfoque cualitativo, de tipo descriptivo, el cual contempla tres fases: la primera hace referencia el método Territori, bajo el cual se enmarca el proyecto y la identificación del territorio desde lo planteado por Bozzano (2009); la segunda aborda propiamente la práctica pedagógica en el aula que consta de cinco momentos: delimitación del problema de estudio, un camino que surge de la observación y exploración del contexto, aproximaciones conceptuales alrededor de la situación de estudio, formulación del proyecto de investigación, el trabajo experimental, el planteamiento de alternativas de solución al problema. Luego se encuentra el análisis de resultados que permiten la consolidación de conclusiones, donde se reflexiona sobre la practica pedagógica, donde el estudiante y el maestro en conjunto pueden llegar a complejizar el conocimiento en ciencia naturales desde una perspectiva ctsa, que permite el reconocimiento de unas relaciones complejas que al ser abordadas en la escuela contribuyen en la transformación del territorio, además, contribuyendo al cumplimiento de los Objetivos de Desarrollo Sostenible (ODS): “Educación de Calidad” y “Producción y Consumo responsable”.
Construyendo mediaciones genuinas: la experiencia de un practicante del Profesorado en Ciencias Biológicas en una institución de acogida de Nivel Superior
Authors: Mancini Miguel Martín
Published: August 2023

Numerosos autores/as abrazan la idea de la permanente discusión, reflexión y dialéctica de la propia práctica (Pérez Gómez, 1995; Maggio, 2012; Edelstein, 2013; Davini, 2015; Litwin, 2016). Idea superadora al perfil tecnocrático y prescriptivo de la escuela tradicional. No sólo es saludable la reflexión sobre la propia práctica y mira a la mejora del ejercicio docente, es ineludible al compromiso de enseñar, y como tal, es un imperativo ético y moral de la tarea profesional de quien tiene la intención de enseñar.
Con estas breves palabras que exponen la importancia del análisis reflexivo, el primer paso al indagar y escrutar esta práctica de enseñanza es dándole entidad (o identidad). Las mismas tuvieron lugar entre la última quincena de abril y primera semana de junio del corriente año. La institución de acogida se corresponde con el Nivel Superior, y me desempeñé como practicante en el espacio curricular Seminario de Educación para la Salud, que figura como Unidad Curricular en el tercer año del programa de la carrera “Profesorado de Educación Inicial” del Ministerio de Educación de la Provincia de Córdoba. El curso, aparte de la docente a cargo y de mí, estaba compuesto por dieciocho alumnas, la mayoría de ellas trabajadoras, y/o con un rol materno activo, y/o que no cursaban Educación para la Salud de manera exclusiva.
La práctica consistió en el desarrollo de tres unidades didácticas . Todos los espacios comunicativos se construyeron en entornos virtuales, debido a la situación de emergencia sanitaria. Entendido este contexto, los dispositivos digitales también fueron protagonistas, ejemplo de ello, la plataforma Google Meet que auspició la comunicación remota durante las clases sincrónicas.
Las prácticas fueron extensas, y los intercambios de mensajes, constantes. Se suscitaron muchísimas situaciones, algunas más ricas que otras, algunas más potentes que otras. Tras una selección minuciosa, cuatro situaciones nodales pasaron el filtro, por considerarlas más holísticas y sustanciosas. A partir de ellas, confluirán las principales categorías teóricas que dan sustento a estas prácticas. ¡Cuánto para decir, para contar, para narrar (Anijovich et al., 2009; Maggio 2012)!¡Y cuánto que omitiré!
Así mismo, quisiera hacer una especial mención al acompañamiento. Estas prácticas no fueron gestadas en la penumbra de la soledad. Deben su riqueza intelectual, cognitiva y afectiva al trabajo profundo e incisivo de tres de mis compañeras, con quienes formamos un cuarteto de prácticas; y a las sugerencias, consejos e intercambios suscitados en los espacios de Tutorías entre el cuarteto y las docentes y ayudantes tutoras de las prácticas (nos nuclea la misma afiliación institucional).
Estado del arte de las Investigaciones en Proyectos Ambientales Escolares (PRAE) en Colombia
Authors: Espinosa Rojas Diana , Castaño Barrera Óscar Mauricio
Published: August 2023

En Colombia, desde 1974 se inicia la incorporación de la educación ambiental en el sector formal educativo; desde el 2002 el país cuenta con la Política Nacional de Educación Ambiental (PNEA) que direcciona los Proyectos Ambientales Escolares (PRAE) en las instituciones de educación básica y media que fueron instituidos originalmente en el decreto 1743 de 1994. El objetivo de éste artículo es presentar una revisión del estado del arte de las investigaciones realizadas alrededor de los Proyectos Ambientales Escolares (PRAE) para visualizar un panorama general de las mismas, los campos investigativos emergentes y los vacíos de conocimiento frente a este respecto. Esta no es una revisión de los PRAE  sino de las investigaciones que se han llevado a cabo cuyo objeto de investigación hayan sido los PRAE.
Para lograr este objetivo, se realizó la búsqueda de artículos científicos y tesis publicados en bases de datos de internet desde el 2002 (fecha en la cual es emitida la PNEA) utilizando como descriptor principal el concepto de “Proyecto Educativo Ambiental”. Se realizó una clasificación preliminar de los artículos de acuerdo con sus objetivos principales y se encontraron seis categorías. Se encontró que la mayor cantidad de publicaciones se han realizado sobre “propuestas” y “caracterizaciones y diagnósticos” y las de menos publicaciones son las de “Propuestas de evaluación” y “experiencias de transversalización”.
Modelos mentales de los agricultores sobre la interacción del hongo Ustilago maydis y la planta de maíz
Authors: Flórez-Quito María Angélica , Alfonso-Sosa María Isabel , Ardila-Bayona Víctor
Published: August 2023

Este trabajo, aborda los modelos mentales que presentan los agricultores de la vereda Palenque de Anapoima, respecto al desarrollo del hongo Ustilago maydis en la planta de maíz. Estas representaciones internas son elaboradas por cada una de las personas sobre el mundo real y permiten identificar las apreciaciones de este fenómeno específico en su cotidianidad. La investigación de tipo cualitativa, utiliza como procesos metodológicos cuestionarios de preguntas abiertas, con esquematizaciones que son implementados a 7 agricultores voluntarios y se desarrolla por medio de la creación de ciertas categorías de análisis según los referentes epistemológicos del fenómeno, teniendo en cuenta la clasificación de las familias de los modelos según Camacho (2012), y la identificación de las representaciones externas propuestas por Rodríguez (2001); basados en el comportamiento del fenómeno, la apropiación que tiene la población sujeto de estudio frente a este y la aplicación de un instrumento (cuestionario) que por una serie de preguntas mediadoras, complejiza la respuesta de los agricultores llegando a ser más detallada, dinámica y certera. Se concluye que los modelos mentales de los agricultores efectivamente son una base para el diálogo entre saberes de vivencias y conocimientos científicos, y que en primera medida predomina la mirada negativa y de alerta hacia la interacción del fenómeno abordado en cuestión.
La observación de mariposas: una estrategia para promover la ciencia ciudadana en el Magdalena Medio, Alto y Oriente de Caldas
Authors: Gómez-Salazar Juan Camilo , Murillo-Montoya Sergio Adrián , Henao-Bañol Efraín Reinel , Tunarrosa-Echeverría Eliana Marcela
Published: August 2023

En Colombia, la ciencia ciudadana ha tomado fuerza en los últimos años como una estrategia para involucrar a las comunidades en procesos de investigación participativa, lo que ha permitido generar conocimiento y sensibilidad ante diversos procesos socioambientales que afectan significativamente los ecosistemas y las especies que habitan en ellos. Este trabajo busca involucrar a las comunidades asentadas en el Magdalena Medio, Alto y Oriente de Caldas, en un ejercicio de ciencia ciudadana denominado “I avistamiento de mariposas diurnas del Magdalena Medio y Oriente de Caldas”, de manera que pueda en un futuro cercano, ser parte de un proceso de apropiación social y del conocimiento perdurable en el tiempo. El enfoque de investigación fue cualitativo e inicialmente, se identificaron y convocaron las entidades públicas y privadas del sector educativo y ambiental de esta región del país, y luego se confirmó su asistencia a las diversas fases del proyecto (inscripción, capacitación y ejercicio investigativo). Se logró la participación de 105 personas pertenecientes a cuatro departamentos y nueve municipios; además, se registraron 80 especies de mariposas diurnas en hábitats urbanos, destacándose el reporte de Parides eurimedes (Papilionidae), una especie endémica de Colombia. La investigación, permitió ampliar los conocimientos entomológicos con estrategias innovadoras y promover un interés general en los participantes, los cuales estuvieron dispuestos a convertir este ejercicio participativo en una acción perdurable en el tiempo. Se espera que la presente investigación sea un aliciente para promover la ciencia ciudadana y la investigación participativa, así como un avance en el reconocimiento y conservación de las mariposas en ecosistemas verdes urbanos de la cuenca del río Magdalena.
Aprendizaje Significativo de las interacciones ecológicas que se presentan entre los organismos vivos en los ecosistemas de la Institución Educativa Barrio Santa Margarita (IEBSM)
Authors: Galeano Marín Juan David
Published: August 2023

El presente artículo da cuenta de una estrategia de enseñanza fundamentada en la Teoría del Aprendizaje Significativo Crítico (TASC), de Moreira (2010) y secuenciada según el Ciclo Didáctico propuesto por Jorba y Sanmartí (1996). El referente conceptual correspondiente a las interacciones ecológicas, se construye a partir de una síntesis de las propuestas de Audesirk, Audesirk, & Byer (2013) y Curtis, & Schnek (2008).
 
Los estudiantes se organizaron en equipos de trabajo con roles específicos, tratando de propiciar el trabajo colaborativo en el desarrollo de una unidad de aprendizaje con actividades diversas como la lectura, la construcción de un mapa mental, el recorrido por las zonas verdes y la grabación y edición de un video tipo documental sobre las interacciones biológicas que se observaron en los ecosistemas de la Institución Educativa Barrio Santa Margarita.
 
La estrategia de enseñanza es potencialmente motivante, debido a que se usaron diversos materiales y estrategias educativas, mediante las cuales los estudiantes pudieron asumir un papel más activo en su proceso de aprendizaje. Debido a que los participantes tuvieron la posibilidad de percibir y representar en su contexto las interacciones ecológicas, considerando su importancia para el equilibrio de los ecosistemas, la propuesta, puede constituirse en un aporte a la enseñanza de una ética ambiental o un sistema de valores ambientales, lo cual puede conllevar a la construcción de nuevos modelos mentales que sean más coherentes con el respeto por todos los seres vivos y los ecosistemas. Adicionalmente, el uso de recursos TIC puede favorecer un Aprendizaje Significativo Crítico (ASC), en tanto posibilita diversificar los recursos educativos y las estrategias didácticas. Es aceptable que las TIC por si solas no constituyen una razón para lograr un aprendizaje significativo, pero cuando están inmersas en un contexto favorable facilitan el logro de los objetivos propuestos (Cobo, 2010).
Efforts to create an erroneous perception in historiography: The case of Stefan Ihrig
Authors: KÖYLÜ Murat
Published: August 2023

Although history is a science based on concrete documents and information in the study of the past, it has started to be used as a tool of political powers, power centers, and groups who want to gain benefits by creating perceptions. As a result of the falsification of concrete facts, popularized history has started to replace real history and manipulate social perceptions. Dozens of popular historiographies create erroneous perceptions about the Turkish nation. These include the Blue Book, which portrays the 1915 events as the Armenian genocide, George Horton's "The Scourge of Asia", which claims that the Great Smyrna Fire was started by the Turks, and Margaret Housepian Dobkin's "Smyrna 1922: The Destruction of a City". One of these is Stefan Ihrig's "Atatürk in the Nazi Imagination". Immediately after the publication of the book by Harvard University Press, newspapers close to the Nazi Party and speeches of politicians within the party began to emphasize the admiration of the Nazis and Hitler for Atatürk, and it was discussed that Hitler took Atatürk as a role model. In particular, the book, which attempted to draw similarities between the Armenian deportation and the Holocaust, was also adopted and supported by some publications supporting the Armenian claims in order to strengthen the "so-called Armenian Genocide" allegations. This study aims to demonstrate the use of popular historiography as a method to create erroneous perceptions of societies by taking the book "Atatürk in the Nazi Imagination" by Stefan Ihrig as an example.
Measurement of GLP-1 release in cell supernatant from Hutu-80 enteroendocrine cells via ELISA v1
Authors: not provided r.mezabrovschi
Published: August 2023

This protocol describes the method of use for the Glucagon-Like Peptide-1 (Active) ELISA Kit96-Well Plate (Cat. # EGLP-35K) to measure GLP-1 release (pM) from supernatant. The assay should be run in duplicate.
XRF Soil Sample Preparation v1
Authors: not provided rund.tawfiq
Published: August 2023

This protocol outlines a procedure for the preparation of both wet and dry soil samples for X-ray Fluorescence (XRF) inorganic chemical analysis. The accurate analysis of soil samples is essential for understanding elemental composition and its implications for various environmental studies. Proper preparation ensures reliable and reproducible results. For wet soil samples, the protocol encompasses drying to remove excess moisture, preventing potential interference with subsequent XRF analysis. For wet and dry soil samples, the protocol outlines grinding to ensure homogeneity and fine particle size. Proper grinding enhances the accuracy of XRF analysis by promoting even distribution and facilitating the release of elemental components.
ChAT Immunofluorescent Staining v1
Authors: Geertsma Haley
Published: August 2023

This protocol is designed for 3-day choline acetyltransferase (ChAT) staining using the EMD Millipore AB144P (RRID:AB_2079751) antibody. Tissue stained with this protocol include 40μm free-floating mouse brain and spinal cord sections, and 20μm pre-mounted retina sections. All tissue was from mice perfused with 10% buffered formalin.
EFFECTS OF COVID-19 ON SUSTAINABLE DEVELOPMENT GOAL 3 IN SUB-SAHARAN AFRICA
Authors: Mangwanya Maonei Gladys , Emmanuel Uwizeyimana Dominique
Published: August 2023

Achieving the Sustainable Development Goals has been a considerable challenge in Africa, especially with the advent of the COVID-19 pandemic. Africa has been struggling to deal with the repercussions of the pandemic as well as other deadly diseases such as tuberculosis, malaria, diabetes, and HIV, which are widespread in all African countries. The purpose of this paper is to assess the impact of COVID-19 on the already precarious healthcare system on the African continent. The study's primary objective is to explore the impact of COVID-19 on achieving Sustainable Development 3. (Good Health and Well Being). The paper reviews literature on health-related issues and the effects of COVID-19, including mortality rates, and correlates the findings to the Goal Setting Theory. The study will utilise a qualitative research design, with the researcher using secondary data to understand how the pandemic has jeopardised the accomplishment of good health and well-being. The conclusions of the researcher will be based on numerous organisation reports, scholarly articles, media articles, and internet sources. The data will be evaluated using a thematic method, with all findings organised into themes. Since the pandemic is still active around the world, the researcher will also make recommendations towards the African Healthcare System.
COPING STRATEGIES AND SUPPORT PROVIDED BY EDUCATIONAL CENTRES TO TEENAGE MOTHERS RE-ENGAGING WITH EDUCATION POST-PREGNANCY. A CASE OF A TOWNSHIP SCHOOL IN SOUTH AFRICA
Authors: Malatji Hlologelo , Dube Nkosiyazi , Nkala-Dlamini Busisiwe , Shumba Kemist
Published: August 2023

Teenage girls who conceive while in school are often confronted with a number of health, social and economic hardships. As a result of the pregnancy related hardships, some of the teenagers drop out of school and fail to re-enter the school system after giving birth. However, a growing body of literature show some of these teenagers re-enter the school system after giving birth to continue with their studies. We employed qualitative approach to explore the coping strategies by teenage mothers’ when they returned to school following childbirth and the support mechanisms used by the schooling system to meet their learning needs. We adopted a single case study design of a South African township school in Gauteng Province, South Africa. We collected data using in-depth one-on-one interviews involving the teenage mothers. The findings revealed that consultations with educators and participating in after-school programmes, with the aim of catching-up on missed content was some of the coping strategies used by teenage mothers re-engaging with education following childbirth. In addition, sympathetic educators provided extra consultation time slots and also motivated the teenagers to persevere and focus on their studies. A call is made for schools to enhance learner support programmes, especially those aimed at supporting teenage mothers who decide to return to school to complete their studies after giving birth.
NEOLOGISMS IN TOURISM REFLECTING CHANGES TO ENGLISH WORLDVIEW
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Sandyha Liliia , Polonska Iryna ,   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Published: August 2023

The article is devoted to English neologisms in tourism and ways of their formation. Neologisms are defined as recently coined or existing words or word combinations which name new phenomena or concepts and which are moderately used by most members of a particular speech community. The study of neologisms in various spheres of functioning is always relevant, as it makes it possible to identify and analyze current changes in modern life. The research is focused on the neologisms which name new types of travel (apitourism, weather tourism, grief tourism, flashpacking), in particular, different types of post-COVID vacations (GOAT, revenge travel) have become very popular as many people were deprived of the chance to travel for a certain period of time. New types of holidaymakers (liveaboards, babymooners, half-tourists), professions (disco nannies, director of first impressions), and the related phenomena (spread booking, ghost flights, air curtain, place lag) are analyzed in the framework of the current paper. The availability of budget travel, which has provided a variety of options for all kinds of travelers, brings both positive and negative consequences as it stimulates the local economy but can also damage the local ecosystems and be detrimental to the local population which is reflected in the neological coinages (extractive tourism, overtourism). The research focuses on the word-forming potential of neologisms in tourism as well, in particular, the analysis showed that most of the considered units were formed by compounding (48% of neologisms of the sample) and blending (44%). The least popular ways of forming neologisms in tourism are affixation (4% of neologisms in the sample), abbreviation and conversion (each method in 2% of neologisms in the sample). At the end of the article, general conclusions are presented, Table 1 ‘Word-formation types of neologisms in tourism’ and suggestions for further neologism research are provided.
HERODIAN. THE HISTORY OF THE EMPIRE AFTER MARCUS AURELIUS. BOOK I (A TRANSLATION FROM ANCIENT GREEK)
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Dovbyshchenko Fedir
Published: August 2023

A Ukrainian translation of the first work of the Greek-speaking historian’s of the era of Roman rule Herodian (III century AD) "The History of the Empire after Marcus Aurelius" (Τῆς μετὰ Μάρκον βασιλείας ἱστορίας βιβλια ὀκτώ), which describes the events in the political the life of the Roman Empire from 180 to 238 AD, that is, from the death of Marcus Aurelius to the coming to power of Gordian III, is offered to the attention of scientists and the general public. Book I covers the reign of emperor Commodus (180–192 AD). The Ukrainian translation of the work is published for the first time in bilingual form. The scientific editor of the translation is Lesia Zvonska, Dlitt., professor of the department of general linguistics, classical philology and neo-hellenistic studies of the Educational and scientific institute of philology of Taras Shevchenko National University of Kyiv. Original text source: Lucarini, C.M. ed. (2005). Herodiani Regnum post Marcum. Munich: Saur.
The effect of the chemical activity of the implanted element to metal alloy components on the formation of surface layers under ion irradiation
Authors:   Udmurt Federal Research Center, Ural Branch of the Russian Academy of Sciences, Vorobyev V. L. , Bykov P. V. ,   Udmurt Federal Research Center, Ural Branch of the Russian Academy of Sciences, Bystrov S. G. ,   Udmurt Federal Research Center, Ural Branch of the Russian Academy of Sciences, Kolotov A. A. ,   Udmurt Federal Research Center, Ural Branch of the Russian Academy of Sciences, Bayankin V. Ya. ,   Udmurt Federal Research Center, Ural Branch of the Russian Academy of Sciences
Published: August 2023

The paper comparatively studies the effect of implanting O+ ions into the Cu50Ni50 and Cu56Mn44 alloys and M0 copper, as well as N+ ions into the VT6 titanium alloy, the 03Kh17N12M2T stainless steel, and Armco iron, on the formation of the chemical composition and changes in the structural and phase state of the surface layers. It is shown that, under conditions of implantation of ions of chemically active elements, the accumulation of the implanted impurity, the formation of chemical compounds, and their precipitation in the form of phase inclusions are determined by the chemical activity of the implanted element to the alloy components. The results obtained will allow the further development of scientific foundations for the formation of the chemical and structural-phase state in materials under nonequilibrium conditions of ion implantation.
Selecting a dependence for the approximation of experimental data on secondary creep and creep rupture strength
Authors:   Institute of Mechanics, Lomonosov Moscow State University, Nazarov V. V.
Published: August 2023

As a rule, for the evaluation of the mechanical characteristics of a metallic material by secondary creep and creep rupture strength, tests are carried out for uniaxial tension of cylindrical specimens under the influence of a stationary axial force. These mechanical characteristics include the experimental dependence of constant strain rate on nominal stress and the experimental dependence of rupture time on nominal stress. In order not to conduct a large number of experiments, so that these mechanical characteristics can be determined at any nominal stress, one of the two empirical dependencies is used, allowing the corresponding experimental dependences to be approximated with the smallest total error. As such empirical dependences, a power dependence with two material parameters and a fractional power dependence with four material parameters are considered, two of which acquire the definite physical meaning of starting creep stress (the maximum stress at which the strain rate is zero) and break creep stress (the minimum stress at which instantaneous rupture occurs). When choosing an empirical dependence, the author used experimental data obtained by him from mechanical tests for uniaxial tension of cylindrical VT5 and VT6 titanium alloy specimens at 650 °C. The calculated total errors testify that both empirical dependences satisfactorily approximate the considered experimental data.
Thermophysical properties of a Cu–Ti–C–B SHS composite
Authors:   Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Pugacheva N. B. , Bykova T. M. ,   Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Senaeva E. I. ,   Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, Goruleva L. S. ,   Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences
Published: August 2023

The paper studies the thermophysical properties of a Cu-Ti-C-B composite produced by self-propagating high-temperature synthesis (SHS) of an initial mixture of copper, titanium, boron carbide (B4C), and carbon powders. The matrix of the composite is a supersaturated solid solution of titanium in a copper lattice with Cu4Ti nanosized particles homogeneously precipitated under cooling. The matrix microhardness is 450 HV 0.1. Particles of titanium carbide (TiC) and titanium diboride (TiB2) resulting from SHS are randomly distributed in the bulk of the composite. The microhardness of the regions with the predominance of TiC particles is 640 HV 0.1, and the microhardness of the regions with the predominance of TiB2 particles is 900 HV 0.1. The average hardness of the composite is 60 HRC. Differential scanning calorimetry demonstrates a unified wide exothermic effect at temperatures ranging from 750 to 1000 °С, with an enthalpy of 148.6 J/g, associated with the exothermic reaction between residual titanium and boron carbide (B4C), which did not react during SHS. The temperature dependences of density, thermal diffusivity, heat capacity, thermal conductivity, and the coefficient of linear thermal expansion are experimentally determined. The particles of the strengthening phases are found to reduce slightly the thermal properties of the composite compared to pure copper. It is shown that annealing at temperatures of 800 and 860°C decreases the level of residual stresses in the composite matrix.
Educação Matemática e o Construtivismo Piagetiano: uma Revisão Sistemática de Literatura
Authors: Sanchez Junior Sidney Lopes , Oliveira Francismara Neves de
Published: August 2023

O campo da Educação Matemática tem se constituído ao longo dos anos pela preocupação com o ensino e a aprendizagem da Matemática. A teoria da Epistemologia Genética de Jean Piaget tem influenciado direta e indiretamente pesquisas no campo da Educação Matemática ao se preocupar com o sujeito que constrói o seu conhecimento na relação com o objeto. O intuito desta pesquisa foi realizar uma revisão sistemática de literatura em banco de dados internacionais e nacionais, a saber, Institute of Educacion Scienses (ERIC) e Scientific Electronic Library Online (SciELO), assim como eventos científicos, como o VII Congresso Internacional de Ensino de Matemática (CIEM), Encontro Nacional de Educação Matemática (ENEM). Foram mapeados trabalhos que abordaram a teoria da Epistemologia Genética e suas relações com as temáticas da Resolução de Problemas, Jogos de regras e Probabilidade. O estudo revelou um incipiente número de trabalhos que se apoiam nos estudos de Piaget, a partir dos critérios elencados, o que evidencia lacunas nas produções científicas, especialmente as brasileiras.
Palavras-chave: Epistemologia Genética, Jean Piaget. Educação Matemática. Revisão de Literatura.
AbstractThe field of Mathematics Education has been established over the years through concern with the teaching and learning of Mathematics. Jean Piaget's theory of Genetic Epistemology has directly and indirectly influenced research in the field of Mathematics Education by focusing on the subject who constructs their knowledge in relation to the object. The purpose of this research was to conduct a systematic literature review in international and national databases, namely, the Institute of Education Sciences (ERIC) and the Scientific Electronic Library Online (SciELO), as well as scientific events such as the VII International Congress on Mathematics Teaching (CIEM), the National Meeting on Mathematics Education (ENEM). Studies that addressed the theory of Genetic Epistemology and its relationships with the themes of Problem Solving, Rule Games, and Probability were mapped. The study revealed a limited number of works that relied on Piaget's studies, according to the listed criteria, which highlights gaps in scientific productions, especially Brazilian ones.
Keywords: Genetic Epistemology. Jean Piaget. Mathematics Education. Review of Literature.
Reflexões Sobre a Sala de Aula Invertida para o Ensino de Cálculo em Cursos de Engenharia
Authors: Pinheiro Geovane Duarte , Boscarioli Clodis
Published: August 2023

O ensino de Cálculo Diferencial e Integral I, doravante chamado apenas de Cálculo, vem sendo objeto de trabalhos científicos ao longo dos tempos, pela sua complexidade, nos primeiros contatos com o Ensino Superior. A abordagem desta pesquisa foi a de utilizar a sala de aula invertida em práticas nessa disciplina para os cursos de Engenharia Civil, Elétrica e Mecânica, em uma instituição particular de ensino, compreendendo as possíveis contribuições dessa metodologia e seus reflexos nos processos de ensino e aprendizagem com o auxílio de tecnologias digitais como vídeos, slides e um ambiente virtual de aprendizagem para realizar os momentos pré-aula e disponibilizar o material de estudo prévio aos alunos. Os resultados apontaram que a metodologia da sala de aula invertida proporcionou um ambiente presencial colaborativo e interativo, com a possibilidade de integração com outras metodologias de ensino. Também, foi perceptível o auxílio que o material previamente disponibilizado ofereceu aos alunos, que poderiam acessá-lo em qualquer momento para seus estudos. Embora tenha ocorrido uma melhora no engajamento e na participação dos alunos durante as aulas, os resultados evidenciaram que ainda é necessário explorar diferentes metodologias aliadas à utilização de tecnologias digitais para auxílio tanto do planejamento e execução das aulas do professor quanto para ampliar o suporte aos alunos em seus estudos.
Palavras-chave: Ensino de Cálculo. Cálculo para a Engenharia. Metodologias de Ensino.
AbstractThe teaching of Differential and Integral Calculus I, hereafter referred to as Calculus, was the subject of recurrent scholarly work during the first contact with higher education because of its complexity. The approach of this research was to use the flipped classroom in practice in this discipline for the courses of Civil Engineering, Electrical Engineering, and Mechanical Engineering in a private teaching institution, in order to understand the possible contributions of this methodology and its reflections in the teaching and learning processes using digital technologies such as videos, slides, and a virtual learning environment to conduct pre-class moments and provide students with prior study materials. The results showed that the flipped classroom methodology provided a collaborative and interactive teaching environment with the possibility of integration with other teaching methods. In addition, the help that the previously available material provided to the students, who could access it at any time for their studies, was remarkable. Although student engagement and participation improved during class, the results show that there is still a need to explore different methods in combination with the use of digital technologies to support both the teacher's planning and execution of the lesson and to extend the support to students in their studies.
Keywords: Teaching Calculus. Calculus for Engineering. Teaching Methodologies
A Comparative Evaluation of Potential Bioactive Properties and Phenolic Profiles of Five Mediterranean Asteraceae Species
Authors: KARADENİZ PEKGÖZ Asuman
Published: August 2023

In recent years, plants with bioactive properties as well as nutritional value have been densely researched. Asteraceae, the most species-rich family of flowering plants, includes numerous wild species most of which are consumed as bioactive compound-rich vegetables and herbal teas. In this study, radical scavenging, antibacterial, and phytotoxic activity as well as phenolic content of some Mediterranean Asteraceae species, Calendula arvensis, Cichorium intybus subsp. intybus, Glebionis coronaria, Scolymus hispanicus, and Tragopogon porrifolius subsp. longirostris, were investigated. As a result, C. intybus, G. coronaria, and S. hispanicus extracts have higher 2,2-diphenyl-1-picril-hydrazyl radical scavenging activity than that of the others (P
Editor’s Note
Authors: Shanahan Daniel , Müllensiefen Daniel , Hansen Niels Chr.
Published: August 2023

No abstract available.
The Effects of Flight Attendants' Authentic Leadership on Relational Energy and Task Performance
Authors:   Korean Academy Of International Commerce, Inc., Lee Myung-Sook
Published: August 2023

Purpose : The purpose of this study aimed to explore 1) the relationships between authentic leadership, relational energy and task performance 2) the relationship between relational energy and task performance 3) the mediating effect of job burnout. Research design, data, methodology : Online questionnaires were conducted for airline flight attendants’, and 210 total valid samples were used for analysis. For the empirical analysis, simple, multiple, hierarchical regression analysis were conducted. Results : The results of the study are as follows; First, the results of this study shows that authentic leadership has a positive effect on the relational energy and task performance. Second, relational energy has a positive effect on the task performance. Third, it has been found that the mediating effect of relational energy. Conclusions : The ultimate results of this study bring up the new direction in ways the human resource management and the organization management in convention industry which emphasizes the importance of uthentic leadership, relational energy and task performance.
An Interpretive Structural Analysis of the Korean Shipping Industry’s Responses to IMO’s GHG Regulations
Authors:   Korean Academy Of International Commerce, Inc., Kwak Dong-Wook
Published: August 2023

Purpose : The purpose of this research is to analyze responses of the Korean shipping industry to IMO’s regulations to reduce greenhouse gas from ships. This includes identifying responses and analyzing their interactions, thus providing with reasonable grounds for the industry’s responses as well as policy suggestions. Research design, data and methodology : This paper collected data from the industry by using the Delphi method, and then adopted ISM(Interpretive Structural Modelling) to structure responses to regulations in a graphical manner. Results : According to the ISM model, it was found that the causal interactions starts from compliance with national action plans thorough alternative vessel fuel and operational efficiency to market-based initiatives. Conclusions : This paper provides policy suggestions, such as establishment of national action plans, concentration of national competencies on the decision and development of alternative fuels, and an impact analysis for supporting the most preferred market-based initiatives for Korean shipping industry.
Analysis of Sea Level Changes in Eastern Taiwan Coast—Case of Yilan Area
Authors:   the Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung, Taiwan, Fang Hui-Ming , Chang Po-Han , Wang Hsing-Yu
Published: August 2023

This study considers the impact of extreme climates on most of the world’s land and seas, which may cause the average sea level to rise due to global climate change. Affected by the rise of sea level, it will change the distribution characteristics of sea tides, waves and currents. When the distribution of tides, waves and currents in the sea area changes, it may cause changes in the overall environmental characteristics of the estuary and coastal areas, and further affects the function of coastal protection facilities. This study takes the sea area of Yilan as an example, and analyzes the problem of sea level rise in the three-in-one climate change (including sea level rise, typhoon and heavy rain). For the analysis of sea level rise, this study calculates tide level data in three ways, the first is simple moving average (SMA), then there are empirical mode decomposition (EMD) and ensemble empirical mode decomposition (EEMD) in the hilbert-huang transform (HHT) for sea level rise analysis. The use of ensemble empirical mode decomposition (EEMD) is because when modal confusion occurs in empirical mode decomposition (EMD), the occurrence of modal confusion can be reduced by adding the decomposed signal to the white noise sequence. Comparing the analysis results of the three respectively, the result obtained by using simple moving average (SMA) is the smallest (2.78 mm/yr), and the result obtained by using ensemble empirical mode decomposition (EEMD) calculation is the largest (4.11mm/yr). By analyzing the results obtained, it can be provided for assessing future hydrological and environmental changes based on climate change conditions.
Removal of Heavy Metals from Industrial Acidic Effluents Using Electroless Plating
Authors:   the Department of Chemical Engineering, University of Johannesburg, South Africa, Sithole Thandiwe , Ntuli Freeman
Published: August 2023

Acid mine drainage (AMD) is one of the biggest issues faced by the mining and mineral processing industries in terms of removing heavy metals from the effluents. The present study investigated the effects of glyoxylic acid, hydrazine and dimethylamine borane as reducing agents and the effect of using Ni, Fe, basic oxygen furnace slag (BOFS) and granulated blast furnace slag (GBFS) as seeding materials to remove metals from acidic effluents respectively. The experiments were conducted using acidic mine effluent in a 0.5 L batch reactor using different seeding materials and reducing agents respectively. The study is the first of its kind to examine and compare all four seeding materials using different reducing agents respectively. X-ray diffraction (XRD) patterns, scanning electron microscope (SEM), and a Fourier Transform Infrared (FTIR) spectrometer were used to analyse the seeding material before and after Electroless plating.. The study suggests that BOFS is a effective seed together with hydrazine reducing agent that yielded a 99.9% removal of Fe (III), whilst Ni and Fe powder failed to seed effectively. During reduction precipitation, nucleation and breakage were identified as the predominant particulate processes based on particle size distribution (PSD) evolution and its moments. There were significant mineral phases formed, such as bownmillerites Ca2(Al, Fe)2O5, which formed by replacing Si with Al and Fe in all tetrahedral coordinations between Al, Fe and Si, suggesting chemisorption being a dominant mechanism.
Instruments for Measuring Pre-service Mathematics Teachers‘ TPACK Skill in Integrating Technology: A Systematic Literature Review
Authors:   University of Malaya, Kuala Lumpur, Malaysia and the Faculty of Teacher Training and Education in Universitas Muhammadiyah Surakarta, Indonesia, Ishartono Naufal , Halili Siti Hajar binti , Razak Rafiza binti Abdul
Published: August 2023

A Systematic Literature Review (SLR) was undertaken by many researchers to examine studies that examined Pre-Service Mathematics Teachers’ technology integration skills in the Technological Pedagogical Content Knowledge (TPACK) framework. However, there has been little SLR research that analyzes the tools employed by earlier studies to measure these skills. As a result, this SLR investigates the instruments used to assess Pre-Service Mathematics Teachers’ (PSMTs) TPACK skills in integrating technology during teaching practice by addressing three issues: 1) what instruments have previous studies used to assess PSMTs’ TPACK skills in integrating technology? 2) what instruments are frequently used as references? and 3) what other frameworks are combined with TPACK in the measurement? This study adhered to the PRISMA guidelines based on the Scopus and Web of Science databases. This study filtered out 17 papers in total. According to the findings of this study, the TPACK questionnaire is the most commonly utilized instrument by researchers in the examined studies. The best appropriate instrument is the TPACK questionnaire created by Schmidt et al. Finally, attitude and perception are heavily incorporated into studies testing the TPACK skills of PSMTs. Future studies can use this study to determine the best instrument for testing PSMTs’ TPACK skills.
Factors Affecting Students‘ Willingness to Use Gamification in University Settings
Authors:   the Self-Development Department, Imam Abdulrahman bin Faisal University, Saudi Arabia. Mohamed Gohari is with the Computer Ssience Department, Imam Abdulrahman bin Faisal University, Saudi Arabia, Alrashed Yousef , Rasheed Abeer , Gohari Mohamed , Eltanahi Najla , Ramzy Samah , Saleh Walaa , Abduljawad Rania , Wahab Hoda
Published: August 2023

This study aims to investigate the factors affecting students’ willingness to use gamification. To achieve this objective, a quantitative research method was used, and data were collected employing the survey technique. The sample of the study consisted of 105 university students in Jordan. The survey was structured to take into consideration the inclusion of students from different colleges and majors. The results indicated that perceived usefulness, normative beliefs and task-technology fit are the factors that have the most significant effect on students’ willingness to use gamification as a learning technique. Hopefully, the results of this study will help in formulating policies and in introducing a new technique to be used by both instructors and students, especially in the classroom setting. The study will also help determine the effectiveness of the technology apps used by university staff in Jordan.
Evaluation of a Computer-Assisted Language Learning System Based on Adaptive Learning Designed for Self-training in Scientific French Language
Authors:   the National School of Applied Sciences, Tetouan, University Abdelmalek Essaadi, Morocco, Chaib Sara Ouald , Joti Imane , Khoulji Samira
Published: August 2023

This article presents the development and evaluation of a computer-assisted language learning system designed for self-training in scientific French language. The main problem addressed by this research is the linguistic obstacles faced by students during their academic years, which inspired the implementation of an adaptive learning system personalized to their needs. The methodology applied involved a need analysis approach to better adapt the French language learning offer to students’ demand, followed by the development of an adaptive learning model based on Item Response Theory (IRT). The system was evaluated by the System Usability Scale (SUS) model which shows high usability and user satisfaction and engagement. The findings were very encouraging, demonstrating that the presented adaptive learning model improves the adaptability of students’ needs and preferences. Overall, the aim of this research is to prove that the proposed learning system will improve the learners’ performance and understanding of scientific French language.
Evaluation of the changes in pre-extraction blood pressure and pulse rate values with post-extraction blood pressure and pulse rate values
Authors: Saikhedkar Rashmi , Jain Samkit , Atre Aditi , Kulkarni Apurva
Published: August 2023

Background: Aim and objectives were to compare the differences in blood pressure and pulse rate readings before and after extraction of a tooth.
Methods: A total of 250 patients were selected for the study, out of which, 124 were males and 126 were females. All the patients were in an age group from 20 till beyond 73 years of age. Blood pressure and pulse rate readings were measured before the start of the procedure. Extraction procedure was performed and post extraction blood pressure and pulse rate values were recorded. Both the values were compared and evaluated.
Results: There was an obvious increase in systolic blood pressure and pulse rate values after a tooth extraction.
Conclusions: Blood pressure and pulse rate values showed changes before and after tooth extraction but were within normal limits.