bluuebunny/crossref_metadata_2025 huggingface dataset:
Educación: Construcción y Reconstrucción en el Contexto Actual
Authors: Martínez Fuentes Marlenis Marisol , Vivas Escalante Amely Dolibeth
Published: April 2023

La educación se entiende como una creación libre que constantemente hace el hombre sobre sí mismo y su realidad; una revalorización continua del sentimiento y de la formación estética. La educación debe dar esa oportunidad de reconstruir y construir un nuevo contenido, manera de conformar a la vez con los demás, una sociedad estable, como así lo señala Rousseau en El Emilio (Virno, 2003). Por ello, esa reconstrucción-construcción de la educación ante los diversos cambios y transformaciones propias del siglo XXI es forzosa, donde la presencia de la Tecnología de la Información y Comunicación conlleva a cambios de paradigmas educativos en el hombre y la sociedad, en general, a cambios permanentes en los saberes, competencias y habilidades indispensables para vivir y desarrollar un trabajo colaborativo.
Brechas educativas en la educación ecuatoriana
Authors: Stefos Efstathios
Published: April 2023

Analizando el perfil profesional y social de los ecuatorianos de 25 a 64 años con estudios universitarios en relación con la población general de la misma edad en Ecuador, se definen varias interrogantes en cuanto a la distribución del nivel de instrucción en esta población y su relación con factores geográficos, de género, étnicos y de condición laboral. Se eligió el rango de 25 a 64 años porque es la edad productiva donde normalmente las personas finalizaron sus estudios y pueden trabajar (OECD, 2021).
Correlación entre autoestima y estrés en adolescentes durante la pandemia de COVID-19
Authors: Vega Acuña Majory Azucena , Vega Falcón Vladimir
Published: April 2023

La pandemia COVID-19 desde su surgimiento ha provocado impactos significativos en toda la sociedad a nivel universal, no obstante, en la población adolescente ha generado cambios en la rutina y actividades desarrolladas a diario vivir, por ello se requieren estudios que analicen la evolución del adolescente en situaciones de cambio, por lo que la presente investigación tiene como objetivo determinar la correlación entre autoestima y estrés en adolescentes durante la pandemia de la COVID-19. Con un enfoque cuantitativo, de tipo observacional, transversal, analítico y prospectivo, correspondiente al nivel investigativo relacional. La población de estudio fueron 229 estudiantes de nivel secundario de la Unidad Educativa “Sagrado Corazón de Jesús”, de la ciudad de Latacunga, Ecuador. El análisis estadístico se realizó mediante el uso del programa IBM SPSS Statistics y se determinó la medida de correlación con el coeficiente R de Pearson. La distribución normal de los datos se comprobó con la prueba de normalidad Kolmogorov-Smirnov con la corrección de significación de Lilliefors. Predominó el hogar biparental (64,6%); la presencia de un hermano (40,6%); presencia de COVID-19 en algún familiar (55,0%); existencia de un proveedor de Internet en el 95,6% de los hogares; Estrés moderado (51,5%); y Autoestima baja (62,0%). En el estudio se evidenció la existencia de una correlación negativa débil (-,203) entre la autoestima y el estrés, por lo cual se rechazó la hipótesis nula.
“ÖĞRETİMİN YOLU OYUNDAN GEÇER”: OTİZM SPEKTRUM BOZUKLUĞUNDA OYUN BECERİLERİNE YÖNELİK NİTEL BİR İNCELEME
Authors: SARAL Dinçer
Published: April 2023

Oyun, bireyin aktif katılımını, gönüllülüğünü ve güdülenmesini gerektiren, gerçekleştirilir-ken bireye haz veren ve onu daha fazla güdüleyen sosyal etkinliklerdir. Otizm spektrum bozukluğu (OSB) olan çocukların dil ve iletişim, sosyal etkileşim ve taklit becerilerinde yaşadıkları yetersizlikler nedeniyle özellikle oyun becerileri en çok güçlük yaşadıkları bece-rilerden biri haline gelmektedir. Bu araştırmada, OSB olan çocuğa sahip ebeveynlerin ço-cuklarının sahip olması gerektiğini düşündükleri oyun becerilerine, gereksinimlerine, oyun becerilerinin öğretiminin önemine ve ebeveynlerin oyun öğretiminde bilgi ve beceri gereksi-nimlerine yönelik görüşlerinin incelenmesi amaçlanmıştır. Durum çalışması modeliyle tasarlanan araştırmanın katılımcıları OSB olan çocuğa sahip 12 ebeveynden oluşmakta-dır. Araştırma amaçları doğrultusunda veriler yarı yapılandırılmış görüşmelerle toplanmış ve içerik analizi ile analiz edilmiştir. Bulgular, ebeveynlerin oyun becerilerini öğret-me/öğrenme, etkileşim ve sosyalleşme aracı olarak tanımladıklarını, çocuklarının oyun becerilerini edinmelerini önemli ve öncelikli bulduklarını ve çocuklarının oyun bağlamları-nın ebeveyn-merkezli olduğunu göstermiştir. Ayrıca, ebeveynlerin çocuklarının sınırlı dü-zeyde oynadıkları, oyunlarının yineleyici davranışlarla örüntülendiği, çocuklarının sosyal-leştireceği nedeniyle sosyodramatik oyun becerilerini edinmeleri, çocuklarının oyun beceri-lerini desteklemek amacıyla eğitim gereksinimlerinin bulunduğu ve bu gereksinimin aile eğitimleriyle karşılanması gerektiği görüşüne sahip olduklarını göstermiştir. Araştırmada elde edilen bulgular alanyazın çerçevesinde tartışılmış ve ileri uygulamalara ve araştırma-lara yönelik önerilerde bulunulmuştur.
O tempo, a memória e a história: ou sobre como extrair uma concepção de tempo para a teoria da História em Marcel Proust
Authors: PAIXÃO Carlos Nássaro Araújo da
Published: April 2023

O presente artigo se propõe a estabelecer uma discussão epistemológica sobre a questão do tempo para a teoria da História. Considerado um substrato fundamental para a construção e a concepção do conhecimento historiográfico, este nem sempre recebeu a atenção necessária. Para tanto, buscar-se-á adentrar nas discussões sobre o estabelecimento das ciências sociais entre o final do Século XIX e as primeiras décadas do Século XX, destacando a problemática temporal levantada pela Filosofia da Intuição de Henri Bergson, a Sociologia da Memória de Maurice Halbwachs e a Literatura de Marcel Proust.
Crítica Pós-Colonial
Authors: SILVA Maurício
Published: April 2023

São muitos os conceitos, ideias, teorias que vêm à mente quando se fala de estudos pós-coloniais, essa área do saber que surge por volta dos anos 70/80 e ganha força nos anos 90/00. Da contestação das narrativas hegemônicas/legitimadoras da modernidade à desterritorialização do sujeito, da releitura dos discursos históricos e culturais, estabelecendo novos protocolos de leitura desses discursos à desconstrução do sujeito colonial, criado a partir de um processo de construção – pelo mundo europeu – de uma imaginário colonial, tudo isso é discutido nos ensaios que compõem essa Crítica Pós-Colonial. Panorama de Leituras Contemporâneas (Rio de Janeiro, 7 Letras, 2013), organizada por Júlia Almeida, Adelia Miglievich-Ribeiro e Heloisa Toller Gomes...
Leitura e produção textual
Authors: FREITAG Felipe , KIST Liane Batistela
Published: April 2023

Dar legitimidade ao discurso da oralidade através do estudo de contos populares ou maravilhosos é valorizar acontecimentos que escapam, ou escapariam à memória histórica. O trabalho com contos populares ou maravilhosos possibilita a ativação do conhecimento de mundo e/ou de deduções que levem os alunos a estabelecer interpretações recíprocas na interação com suas vivências. Textualizar o cotidiano, as vivências, as memórias não legitimadas pelo discurso histórico, as narrativas que circulam e circundam pelo espaço social. Valorizar histórias subalternizadas pela erudição, que podem e que devem construir hábitos de leitura numa localização de identidades e identificações. Muito mais do que justificar, cabe ao presente processo de ensino, o questionar, e é nesse questionamento que se inicia o desenvolvimento de vozes narrativas silenciados por grande parcela da intelectualidade.
[Recebido: 8 set. 2015 – Aceito: 8 nov. 2015]
O real do narrador fantástico – uma análise de Viver para contar, de Gabriel García Márquez
Authors: AMORIM Maria Inês Freitas de
Published: April 2023

Viver para contar é a obra autobiográfica de Gabriel García Márquez, um dos escritores mais expressivos do Real Maravilhoso. Em suas obras, o autor representa a realidade latin-americana, apresentando como o fantástico é um elemento que convive cotidianamente na realidade do continente. Em sua autobiografia, o autor revela sua trajetória, destacando as experiências e os personagens que influenciaram sua criação literária. O presente trabalho busca analisar a obra a partir das reflexões teóricas sobre o Pacto Autobiográfico, de Phelippe Lejeune (2008).
[Recebido: 5 set. 2015 – Aceito: 7 nov. 2015]
La lingua straniera veicolare nella scuola dell’infanzia
Authors: Daloiso Michele
Published: April 2023

The present paper focuses on some theoretical and methodological issues regarding preschool familiarisation to foreign languages. In particular, it highlights the contribution provided by Carmel Mary Coonan on this topic, as well as the implications for the next generations of scholars who have conducted and continue to conduct research in this thriving field of Educational Linguistics.
EMI (English Medium Instruction) all’università: occasioni di confronto tra docenti disciplinaristi e linguisti educativi
Authors: Di Sabato Bruna , Mezzadri Marco
Published: April 2023

The paper investigates the professional competences needed in EMI contexts, starting from the stakeholders’ perception and awareness of such specific needs. This is part of a research project involving the two authors whose final outcome is a framework for Collaborative Professional Development specifically tailored for teaching through English in the Italian academic context. After illustrating the general premises of the project, we here share the preliminary data collected thanks to a survey involving EMI specialists and educational linguists. Assessing EMI stakeholders’ perceived needs in order to improve their teaching in English, and the role of Educational Linguistics specialists in EMI professional development, are the first two steps of the project.
Comunicazione, mediazione e argomentazione in classe CLIL
Termini e definizioni nel discorso didattico
Authors: Gilardoni Silvia
Published: April 2023

This paper aims at examining classroom communication in a CLIL context, through a reflection on ways of knowledge transmission and on the role played by argumentation in classroom interaction. The research is based on a corpus of CLIL classroom interactions in upper secondary schools in Italy and focuses on the analysis of the treatment of specialised terminology and on the use of definitions in classroom discourse. The study has a dual purpose: a mainly descriptive purpose, represented by a qualitative and interpretative analysis of the CLIL teacher’s discursive strategies of definition in CLIL classroom interactions, combined with the aim of offering methodological and operational suggestions for training and teaching.
Il CLIL con studenti universitari di livello linguistico avanzato
Authors: Mazzotta Patrizia
Published: April 2023

In language teaching it is believed that CLIL is a particularly effective methodology for promoting the learning of foreign languages through the study of non-linguistic subjects. For university students who already possess advanced skills in English, the linguistic objective of a CLIL path should consist not so much (or not only) in the knowledge of specific terminology as in the ability to produce texts, especially written ones, conforming to the specific textual, rhetorical and genre conventions both of each discipline and of the target cultural community. Here we analyse the advantages of CLIL with university students of advanced linguistic level, but also the main learning difficulties and teacher training problems posed by this methodological choice.
Bisogni e preoccupazioni del corpo docente impegnato in English Medium Instruction (EMI)
Una prospettiva italiana post-pandemia
Authors: Bier Ada , Borsetto Elena
Published: April 2023

As a global phenomenon, internationalisation exerts a great impact on Higher Education Institutions (HEIs) all over the world. Among the stakeholders mostly affected are the academic staff. The situation is especially critical in Italy, where teacher training was not a priority in pre-Covid times and where the outbreak and effects of the pandemic have been severe. These circumstances contribute to making Italian university teachers’ needs and concerns in post-pandemic EMI (English Medium Instruction) an area particularly worth exploring. This contribution investigates the case of a middle-sized public University in Northern Italy, where a needs analysis questionnaire was sent to the academic staff to understand how they address the additional challenges that internationalisation poses to teaching, with special regard to the provision of EMI. We also inquired into whether the pandemic has modified the teachers’ styles of teaching, and in which ways.
Features and efficiency of high-carbon steel ablation by a scanning beam of the nanosecond pulsed Yb:YAG laser
Authors:   LLC “Laser Center”, Mikhailov S. B. , Gorny S. G. ,   LLC “Laser Center”, Sharikov A. N. ,   Prokhorov General Physics Institute of the Russian Academy of Sciences
Published: April 2023

The experiments results on the ablation of high-carbon (> 97 % Fe, 1.3 % C) and low-carbon (> 97 % Fe, 0.3 % C) steel targets by a nanosecond pulse laser radiation scanning beam are presented. The dependence of the depth and energy efficiency of ablation on the power density in the range q = 4·108 – 1010 W/cm2 has been determined. It has been established that the maximum efficiency of material removal is achieved at q = 4·109 W/cm2 for a high-carbon steel target and in the range q = 7·108 – 5·109 W/cm2 for a low-carbon steel target. The size distribution of ejected microparticles was determined. It has been established that a back flow of particles occurs upon irradiation of high-carbon steel and the flow origin mechanism is associated with nanosized condensate particles. Based on the reflectivity measurements and the electron microscopy microstructure study of the irradiated surface, it has been suggested that the mechanism for the higher efficiency of ablation of high-carbon steel compared to low-carbon steel is the condensation process of supersaturated carbon vapors on the target surface that increases the irradiated target surface absorptivity and, consequently, the material removal efficiency of the subsequent scanning pass is increased.
Features of the defect structure and photoluminescence of nominally pure LiNbO3 crystals grown from boron doped charge
Authors:   Tananaev Institute of Chemistry — Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, ICT KCS RAS, Sidorov N. V. , Kadetova A. V. ,   Tananaev Institute of Chemistry — Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, ICT KCS RAS, Smirnov M. V. ,   Tananaev Institute of Chemistry — Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, ICT KCS RAS, Titov R. A. ,   Tananaev Institute of Chemistry — Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, ICT KCS RAS, Teplyakova N. A.  ,   Tananaev Institute of Chemistry — Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, ICT KCS RAS, Palatnikov M. N. ,   Tananaev Institute of Chemistry — Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”, ICT KCS RAS
Published: April 2023

Features of the defect structure of nominally pure LiNbO3:В crystals were investigated by X-ray diffraction analysis and photoluminescence. Crystals were grown by the Czochralski from a mixture of congruent composition charge containing 0.08 and 0.12 wt. % boron. At this, the concentration of boron in crystals is at the level of trace amounts of metallic impurities and is ~ 10–4 wt%. MeO6 oxygen-octahedral clusters are responsible for the ferroelectric and nonlinear optical properties of the crystal. It has been found that in LiNbO3:B crystals, the lengths of O–O, Me–O, and Me–Me (Me–Li, Nb) bonds in clusters, the arrangement of Me cations, vacancies, and NbLi point defects along the polar axis differ significantly from those for nominally pure congruent crystal. NbLi defects and transition metals are deep electron traps responsible for the photorefraction effect. The photoluminescence spectra showed that the concentration of defects and metals in the investigated LiNbO3:B crystals is lower than in the congruent crystal. these differences can be due to both a change in the properties of the boron-containing melt and the localization of trace amounts of boron in the O4 tetrahedral gaps of the LiNbO3 crystal structure. In the first case, reactive boron binds cations of niobium and transition metals in the melt into stable complexes.
Biocompatibility of Ti – Al intermetallic coatings on titanium alloy Ti6Al4V
Authors:   Institute of Materials Science of Far Eastern Branch of the Russian Academy of Sciences, Burkov A. A. , Chigrin P. G. ,   Institute of Materials Science of Far Eastern Branch of the Russian Academy of Sciences, Sazonova E. N. ,   Federal State Budgetary Educational Institution of Higher Education“Far Eastern State Medical University”Ministry of Health of the Russian Federation, Ilchenko P. A. ,   Federal State Budgetary Educational Institution of Higher Education“Far Eastern State Medical University”Ministry of Health of the Russian Federation
Published: April 2023

Titanium alloy Ti6Al4V is the most common metal material in orthopaedics. However, it is characterized by high elasticity and bioinertness, which makes it difficult to osseointegrate on its surface and leads to aseptic loosening of the implant, has insufficient corrosion resistance and high wear, leading to the accumulation of metal ions and wear particles in the body of patients. To eliminate these shortcomings, a Ti – Al coating was prepared by electrospark processing of the Ti6Al4V alloy in an equimolar mixture of titanium and aluminum granules. The prepared TiAl coating consists of intermetallic phases: Ti3Al, TiAl, TiAl2, and TiAl3, which have higher tribological properties. Thus, the average value of the friction coefficient of the sample with a TiAl coating was 12% lower, and the reduced wear was 2.36 times less than the original Ti6Al4V alloy one in a simulating body fluid. In addition, the deposition of a TiAl coating on the Ti6Al4V alloy makes it possible to increase the corrosion resistance of its surface. Biomedical studies have shown that the deposition of a TiAl coating on a Ti6Al4V alloy increases the resistance of erythrocytes to the hemolytic agent action. Improving the biological activity of the alloy surface during ESA deposition of TiAl coating leads to normal growth of fibroblasts on it without signs of cytotoxity. Treatment of samples with adhered cell culture by a solution of trypsin-Versen led to a reduction in the density of cells in the coating by 42 %, while in the alloy by 60 %. This indicates a better fibroblast attachment to the surface of the Ti-Al coating, compared to the Ti6Al4V alloy.
Choice of accelerators of the vulcanization group for rubbers based on epichlorohydrin rubber
Authors:   Institute of oil and gas problems SB RAS of FRC “Yakut science center SB RAS”, Davydova M. L. , Khaldeeva A. R. ,   Institute of oil and gas problems SB RAS of FRC “Yakut science center SB RAS”, Fedorova A. F. ,   Institute of oil and gas problems SB RAS of FRC “Yakut science center SB RAS”, Sokolova M. D. ,   Institute of oil and gas problems SB RAS of FRC “Yakut science center SB RAS”
Published: April 2023

The effect of vulcanization accelerators on the structure and properties of rubbers based on Hydrin T6000 epichlorohydrin rubber has been studied. Mercaptobenzthiazole (MBT) in the amount of 1.5 pts.wt., tetramethylthiuram disulfide (TMTD) — 0.5 – 1.5 pst.wt. were used as accelerators and N,N’-diphenylguanidine (DPG) — 0.5 – 1.5 pst.wt., which represent a triple system of accelerators. The choice of accelerators is based on the possibility of obtaining a vulcanization spatial structure of different sulfide content: thiuram group accelerators promote the formation of mono-, disulfide bonds; guanidine — polysulfide bonds, and thiazole groups — from carbon-carbon to polysulfide with varying degrees of sulfide. According to the results of the study of physical and mechanical properties, the determination of the parameters of the spatial grid and the study of the dynamic behavior of rubber, differences were revealed due to the formation of a spatial structure with different types of cross-links and density. It is shown that rubber containing 1.5 pst. wt. MBT, 0.5 pst. wt. DFG and 0.5 – 1.0 pst.wt. TMTD due to the manifestation of a synergistic effect on the formation of a vulcanization network of a certain density and the ratio of poly-, di- and monosulfide cross-links. Thus, the use of a group of accelerators with different functional effects makes it possible to obtain vulcanizates with an optimal set of technological and operational properties.
Changes in the microstructure and hardness after heat treatment of a billet made of powder high-speed steel R6M5K5 containing a diffusion-alloyed additive
Authors:   NUST MISiS, Akhmetov A. C. , Eremeeva Zh. V. ,   NUST MISiS
Published: April 2023

In this work, a study was made of the change in the microstructure of a hot-pressed billet from a powder mixture of high-speed steel grade R6M5K5 containing a diffusion-alloyed additive based on tungsten, molybdenum, cobalt and iron after heat treatment processes: quenching in oil at a temperature of 1230 °C and double high tempering at 550 °C for 60 min. The study was carried out using electron microscopy and energy dispersive X-ray spectroscopy. After quenching, dissolution of small-sized carbides in the matrix is observed, and after two-fold tempering, secondary carbides of the M6C and MC types are already precipitated. The second type of carbides is formed from a separate structural component — a phase based on ferrovanadium, whose powder was used as a source of vanadium. Also, cobalt is unevenly distributed in the matrix, which is concentrated in a separate phase based on a diffusion-alloyed additive. These phases practically do not dissolve, and are quite stable under these conditions of hot pressing and heat treatment. It is shown that the hardness of blanks changes from 63.1 HRA after hot pressing to 67.2 HRA after quenching and up to 66.3 HRA after double tempering.
Influence of the number of impregnation stages on the macrostructural and strength characteristics of glassy carbon foams
Authors:   Joint Stock Company “Research Institute of Structural Materials Based on Graphite “NIIgrafit”, Ponomareva D. V. , Timoshchuk E. I. ,   Joint Stock Company “Research Institute of Structural Materials Based on Graphite “NIIgrafit”, Shirokov R. E. ,   Joint Stock Company “Research Institute of Structural Materials Based on Graphite “NIIgrafit”, Vasilyeva E. V. ,   Joint Stock Company “Research Institute of Structural Materials Based on Graphite “NIIgrafit”, Lyapin I. I. ,   Joint Stock Company “Research Institute of Structural Materials Based on Graphite “NIIgrafit”, Takhtin V. Y. ,   Joint Stock Company “Research Institute of Structural Materials Based on Graphite “NIIgrafit”
Published: April 2023

The template synthesis of glassy carbon foams was used in the work and the influence of the initial template cell size, the concentration of the solution, and the number of impregnation stages on the macrostructural and strength characteristics of the obtained materials was studied. As a carbon precursor was used the solution of Novolac resin grade SFP-012A2, the coke residue of which is more than 57 wt. %. It was shown that increasing the number of impregnation stages makes it possible to improve strength characteristics while maintaining open porosity at the level of 90 %, while glassy carbon foam based on a polyurethane template with a porosity of 60 pores per inch and 4 stages of impregnation with a solution with a concentration of 30 wt. % has the best set of properties due to the uniform wall thickening in the material volume. The value of compressive strength was 1.12 MPa, which is 2 times higher than the value of foreign analogues, while the open porosity was 91 %. It has been established that a decrease in the size of the cells of the initial template can lead to embrittlement of the material due to the formation of a cluster of overlapped cells. Increasing the mechanical strength of glassy carbon foams while maintaining an open-cell structure expands the field of application of this class of materials.
Research of nanosized iron oxide powder as a biologically active material
Authors:   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Kataev V. S. , Fedotov M. A. ,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Andreeva N. A. ,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Fomina A. A. ,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Volchenkova V. A. ,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Alpatov A. A. ,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences
Published: April 2023

A polydisperse nanopowder of iron oxide, consisting of hematite α-Fe2O3 and magnetite Fe3O4, was obtained by the method of solid-phase reduction of iron hydroxide Fe(OH)3. On the basis of the obtained iron oxide nanopowder, aqueous suspensions were prepared in the concentration range of 0.25 – 1.25 mg/l with a particle dispersion of 100 – 400 nm. To assess the biological activity of iron oxide nanopowder, pre-sowing treatment of corn seeds Zéa máys was carried out. It has been established that the treatment with nanoparticles has a stimulating effect on the development of the plant organism, making it possible to achieve an increase in germination by 15% and root mass by 23%. Determination of the quantitative content of iron in different parts of the plant was carried out using atomic emission and atomic absorption spectroscopy. It was shown that as a result of treatment of plants with iron nanoparticles, its accumulation in the root mass with subsequent redistribution to the leaves to stimulate the process of photosynthesis is observed.
Trayectorias hipotéticas de aprendizaje en la formación inicial de profesores de matemáticas de secundaria

Authors: Gómez Pedro , Lupiáñez José Luis
Published: April 2023

La noción de trayectoria hipotética de aprendizaje ha despertado recientemente interés en la literatura de investigación en educación matemática. Sin embargo, el papel que esta noción puede jugar en la formación inicial de profesores de matemáticas de secundaria no es claro. En este artículo, revisamos las diferentes interpretaciones de esta noción y proponemos una adaptación de la misma con la que el futuro profesor de matemáticas de secundaria puede recoger y organizar información para el diseño de unidades didácticas. Hypothetical Learning Trajectories in Preservice Mathematics Teachers TrainingThe notion of hypothetical learning trajectory has arisen interest in recent research literature in mathematics education. Nevertheless, the role that this notion can play in preservice secondary mathematics teachers training is not clear. In this article, we review some of the interpretations of this notion and propose an adaptation that can be used by preservice secondary mathematics teachers in order to collect and organize information for the design of didactical units.Handle: http://hdl.handle.net/10481/4708Nº de citas en WOS (2017): 3 (citas de 2º orden, 0)Nº de citas en SCOPUS (2017): 3 (citas de 2º orden, 0)
Situaciones asociadas a los números negativos en textos de matemáticas españoles de los siglos XVIII y XIX

Authors: Maz Alexander , Rico Luis
Published: April 2023

Se presenta el avance de una investigación sobre la presencia de los números negativos en los textos de matemáticas publicados por autores españoles durante los siglos XVIII y XIX. El centro de atención ha estado en determinar el tipo de situaciones con las que se asociaba el número negativo. Situations Related to Negative Numbers in Spanish Mathematics Textbooks of 18th and 19th Centuries This is an advance of an investigation about the presence of the negative numbers in the texts of mathematics published by Spanish authors during the 18th and 19th centuries. The centre of attention is to determine the type of situations which were associated to the negative number.Handle: http://hdl.handle.net/10481/4715Nº de citas en WOS (2017): 4 (citas de 2º orden, 2)Nº de citas en SCOPUS (2017): 4 (citas de 2º orden, 3)
El Pensamiento multiplicativo en los primeros niveles. Una investigación en curso

Authors: Bosch María Asunción , Castro Encarnación , Segovia Isidoro
Published: April 2023

Este artículo muestra los resultados parciales de un estudio empírico sobre el desarrollo de pensamiento multiplicativo en los primeros niveles escolares. Concretamente, se han realizado entrevistas a niños de tercer curso de segundo ciclo de Educación Infantil (cinco años) en las que se han planteado, mediante situaciones manipulables, varios problemas de división que no podían ser resueltos mediante reparto, así como algunas preguntas sobre pensamiento relacional (de tipo proporcional). Multiplicative Thinking in Early Schooling: An Ongoing Research Study This paper shows some partial results of an empirical study on the development of multiplicative thinking in early schooling. In particular, we posed manipulative situations to children of third course of second cycle of Kindergarten (five years). These situations are constituted by several division problems that could not be solved by sharing, as well as some questions on (proportional) relational thinking.Handle: http://hdl.handle.net/10481/4700Nº de citas en WOS (2017): 1 (Citas de 2º orden, 0)Nº de citas en SCOPUS (2017): 1 (Citas de 2º orden, 1)
Formación del profesorado en educación matemática en españa: producción de tesis doctorales y de articulos

Authors: Torralbo Manuel , Maz Alexander , Vallejo Mónica , Fernández-Cano Antonio
Published: April 2023

Presentamos una visión global de la formación de profesores en el sistema educativo español, en relación con la educación matemática, la cuál está presente en los planes de formación de maestros de primaria, aunque no de manera amplia, pero sí suficiente para adquirir unos conocimientos básicos para su futuro desempeño profesional. Así mismo, estudiamos tesis doctorales y publicaciones científicas del área para analizar qué tipo de investigaciones se realizan en España relacionadas con la formación de profesores de matemáticas, así como para identificar algunos descriptores cienciométricos. Teacher Training in Spanish Mathematics Education: Ph D. Dissertation and Articles Production We present a global perspective of mathematics teachers training in the Spanish educational system. In the case of future primary teachers, mathematics education is part of the content of their higher education, although it doesn’t have a strong presence. It is just sufficient for the acquisition of basic knowledge for their future professional performance. In addition, we study doctoral dissertations and journals about mathematics education in order to analyze the type of research which is performed in Spain in relation with mathematics teachers training and to identify some scientometrical descriptors.Handle: http://hdl.handle.net/10481/4707Nº de citas en WOS (2017): 3 (Citas de 2º orden, 16)Nº de citas en SCOPUS (2017): 1 (Citas de 2º orden, 7)
Diagrammatic thinking: Notes on Peirce’s semiotics and epistemology

Authors: Radford Luis
Published: April 2023

In this paper, I discuss the role of diagrammatic thinking within the larger context of cognitive activity as framed by Peirce’s semiotic theory of and its underpinning realistic ontology. After a short overview of Kant’s scepticism in its historical context, I examine Peirce’s attempt to rescue perception as a way to reconceptualize the Kantian “manifold of senses”. I argue that Peirce’s redemption of perception led him to a series of problems that are as fundamental as those that Kant encountered. I contend that the understanding of the difficulties of Peirce’s epistemology allows us to better grasp the limits and possibilities of diagrammatic thinking. Pensamiento diagramático: notas sobre la semiótica y la epistemología de Peirce En este artículo se discute el papel que desempeña el concepto de pensamiento diagramático en el contexto de la actividad cognitiva, tal y como es concebida dentro del marco de la teoría semiótica de Peirce y su subyacente ontología realista. Luego de presentar una visión general del escepticismo kantiano en su contexto histórico, se examina el esfuerzo de Peirce por rescatar la percepción, esfuerzo que lo lleva a indagar de manera innovadora el “multiespacio de los sentidos” del que hablaba Kant. Se mantiene que este esfuerzo lleva a Peirce a una serie de problemas que son tan fundamentales como los que Kant encontró en su propio itinerario epistemológico. Se sostiene que la comprensión de las dificultades intrínsecas a la epistemología de Peirce nos permite cernir mejor los límites y posibilidades de su pensamiento diagramático.Handle: http://hdl.handle.net/10481/4217Nº de citas en WOS (2017): 4 (Citas de 2º orden, 10)Nº de citas en SCOPUS (2017): 2 (Citas de 2º orden, 10)
Metodología de una investigación sobre métodos de enseñanza de problemas aditivos con números negativos

Authors: Bruno Alicia
Published: April 2023

Se presenta la metodología de una investigación de aula donde se contrastan dos métodos de enseñanza de problemas aditivos con números negativos. En el “método redactar” los alumnos enuncian los problemas, aprenden sus estructuras y resuelven problemas propuestos por sus compañeros. En el “método resolver” se practican los problemas en una secuencia marcada por un orden de dificultad. El conocimiento adquirido se contrastó con el de otros alumnos que resolvieron problemas del libro de texto como aplicación de reglas operatorias. La metodología conjuga un tratamiento estadístico para contrastar la efectividad de los métodos con base en el éxito en la resolución y un estudio cualitativo de ciertos aspectos del “método redactar”. Methodology for a Research about Teaching Methods of Additive Problems with Negative Numbers We present a research methodology used in a classroom study in which two different learning methods of additive problems with negative numbers are compared. With the “writing method” students write the problems, learn their structures and solve problems that have been written by their partners. With the “solving method” students practice additive problems in a given sequence, according to the problems level of difficulty. The knowledge acquired was compared with the one obtained by other students who solved additive problems from the textbook, as application of operational rules. We have used a mixed methodology: A statistical treatment to contrast the effectiveness of the methods for solving problems and a qualitative study of certain aspects of the “writing method”.Handle: http://hdl.handle.net/10481/4214
Lógica y pensamiento aritmético

Authors: Ortiz Alfonso
Published: April 2023

Presentamos los resultados obtenidos en una prueba sobre razonamiento inductivo numérico finito y unas entrevistas clínicas posteriores realizadas a escolares de educación primaria. La primera fue respondida por 400 escolares. Con base en los resultados obtenidos, se seleccionaron 28 alumnos para realizarles entrevistas clínicas individualizadas con el fin de determinar la evolución de las relaciones lógicas que estos escolares pueden establecer en el campo de los números naturales finitos. El origen de este estudio está en problemas históricos sobre los fundamentos lógicos de la aritmética. Buscamos determinar de forma empírica hasta qué punto la lógica juega un papel determinante en el origen de la aritmética o, por el contrario, si los orígenes de la lógica están predeterminados por la aritmética y otros conocimientos. Logic and Arithmetic Thinking We present the results of two tests performed by primary school students. The first one was on finite numeric inductive reasoning and was performed by 400 students. According to its results, we selected 28 students to whom we clinically interviewed aiming to determine the evolution of the logic relations that they can establish in the field of finite natural numbers. This study originates on historic problems of the logical foundation of arithmetic. We aim to empirically determine the extent to which logic plays a key role in the origin of arithmetic or, on the contrary, if the origins of logic are predetermined by arithmetic and other fields.Handle: http://hdl.handle.net/10481/4215Nº de citas en WOS (2017): 1 (Citas de 2º orden, 0)Nº de citas en SCOPUS (2017): 1 (Citas de 2º orden, 0)
Cognitive processes associated with the professional development of the mathematics teacher

Authors: Muñoz-Catalán M. Cinta , Climent Nuria , Carrillo José , Contreras Luis Carlos
Published: April 2023

This paper proposes a model of professional development based on Sfard’s stages of interiorisation, condensation and reification, which highlights the teacher’s cognitive processes. The model is applied to the case study of a primary teacher participating in a collaborative project for professional development. This adaptation of Sfard’s stages proves to be of special value when interpreting the process of the teacher’s professional development from a cognitive perspective. Procesos cognitivos asociados al desarrollo profesional del profesor de matemáticas Este artículo propone un modelo de desarrollo profesional que pone de relieve los procesos cognitivos del profesor, en relación con las fases de interiorización, condensación y cosificación del trabajo de Sfard. El modelo se aplica al caso de una maestra que participa en un proyecto colaborativo de desarrollo profesional. La adaptación de las fases de Sfard se muestra valiosa para interpretar el proceso de desarrollo profesional de la maestra desde una perspectiva cognitiva. Handle: http://hdl.handle.net/10481/3509Nº de citas en WOS (2017): 1 (Citas de 2º orden, 0)Nº de citas en SCOPUS (2017); 1 (Citas de 2º orden, 1)
Funcionalidad de juegos de estrategia virtuales y del software Cabri-Géomètre II en el aprendizaje de la simetría en secundaria

Authors: Rodríguez Guadalupe , Hoyos Verónica
Published: April 2023

Presentamos resultados de un estudio exploratorio cuyo propósito es indagar sobre el uso del Cabri-Géomètre II y de un juego matemático virtual de estrategia cuando se incluyen en clases ordinarias de matemáticas de estudiantes de 12-13 años en una escuela secundaria pública de México. Para este trabajo, el tema abordado fue la simetría. El análisis de datos permitió ver la funcionalidad de estos ambientes para transformar las nociones del alumno sobre el tema y para reconocer que se puede avanzar en el desarrollo de un pensamiento matemático distinto a través de ambientes de aprendizaje computacionales. Functionality of Mathematical Strategic Electronic Game and Software Cabri-Géomètre II in the Learning of the Symmetry in Secondary We present the results of an exploratory study whose purpose was to explore the use by 12-13 years old students of Cabri-Géomètre II and a mathematical strategic virtual game in a Mexican state school. For this paper, the mathematical focus was on symmetry. The data analysis allowed us to observe the functionality of this learning environment to transform the students’ conceptions and to recognize that a different type of mathematical thinking can be developed with these computational learning environments.Handle: http://hdl.handle.net/10481/4450
Ukrayna-Rusya savaşı bağlamında Avrupa’da aşırı sağın yükselişi: 2022 Fransa seçimleri ve Marine Le Pen örneği
Authors: ÜSTE Ahmet Nazmi , MANTOĞLU Ayşem Selen
Published: April 2023

Amaç – Avrupa’da aşırı sağ ve popülizm ilişkisi, 2022 Fransa seçimleri üzerinden dışsal bir faktör olarak Ukrayna-Rusya savaşı aracılığıyla incelenmektedir.

Yöntem – Çalışmada nitel araştırma yöntemlerinden yararlanılmıştır. Gazete ve arşiv taraması, siyasi parti liderlerinin söylem analizleri kullanılmıştır. Siyasi parti liderlerinin Ukrayna-Rusya savaşı öncesi ve sonrası söylemleri yazılı, görsel ve dijital medya aracılığıyla analiz edilmiştir.

Bulgular – Ukrayna-Rusya savaşı ile sağ popülist partilerde oy artışı yaşanmış; parlamentoda bu partilerin temsil gücü artmıştır. Savaş nedeniyle aşırı sağ popülist parti ve liderlerin siyaset ve ekonomiye ilişkin tezleri kamuoyunda tartışılmaktadır.

Sonuç – Ukrayna-Rusya savaşı, Avrupa’daki popülist politikalara ve söylemlere sahip aşırı sağ partilerin Rusya ile ilişkilerinin tartışıldığı ve AB yaptırımları karşısında bu partilerin politikalarının analiz edildiği bir süreci beraberinde getirmiştir. 2022 Fransa seçimleri özelinde ve AB genelinde Ukrayna-Rusya savaşı popülist söylem geliştiren aşırı sağ partilerin oy artışında etkili olmuştur.
O CUIDADO DE ENFERMAGEM À LUZ DA SEGURANÇA DO CLIENTE NEONATAL
Authors: Silva dos Santos Raisa
Published: April 2023

Objetivo: A pesquisa objetiva identificar ações adotadas pela equipe de enfermagem em prol da segurança do cuidado na Unidade de Terapia Intensiva Neonatal. Método: Revisão integrativa da literatura com busca na Biblioteca Virtual em Saúde, em artigos publicados  de 2017 ao ano de 2022. Resultados: As principais estratégias identificadas em prol da segurança do cliente neonatal pela equipe de enfermagem foram: identificação correta do paciente; prevenção de erros de preparo e administração  de medicamentos, prevenção de lesões de pele e a comunicação efetiva entre profissionais e familiares. Considerações Finais: Ao final, conclui-se que tais medidas contribuirão para reforçar a cultura de segurança do cliente neonatal.
Supporting the Undergraduate Study of Theology
Authors: Rogers Peter
Published: April 2023

This article explores the experience of a Research and Education librarian providing instruction, reference, and some collection development support for undergraduate theology classes while at the same time lacking expertise and experience in the field.  First, it discusses the importance of providing theological librarian support for undergraduate education at Providence College.  Second, the article details several of the challenges encountered providing this support.  Third, and perhaps most important, it examines ways that librarians without specific theological expertise can make use of the experience and training that we do possess.
Current Advancements and Strategies of Biomaterials for Tendon Repair: A Review
Authors: Yu Xiao , Cui Jie , Shen Yihong , Guo Wanxin , Cai Pengfei , Chen Yujie , Yuan Zhengchao , Liu Mingyue , EL-Newehy Mohamed , EL-Hamshary Hany , Morsi Yosry , Sun Binbin , Shafiq Muhammad , Mo Xiumei
Published: April 2023

Tendon is a bundle of tissue comprising of a large number of collagen fibers that connects muscle to bone. However, overuse or trauma may cause degeneration and rupture of the tendon tissues, which imposes an enormous health burden on patients. In addition to autogenous and allogeneic transplantation, which is commonly used in the clinic, the current research on tendon repair is focused on developing an appropriate scaffold via biomaterials and fabrication technology. The development of a scaffold that matches the structure and mechanics of the natural tendon is the key to the success of the repair, so the synergistic optimization of the scaffold fabrication technology and biomaterials has always been a concern of researchers. A series of strategies include the preparation of scaffolds by electrospinning and 3D printing, as well as the application of injectable hydrogels and microspheres, which can be used individually or in combination with cells, growth factors for tendon repair. This review introduces the tendon tissue structure, the repair process, the application of scaffolds, and the current challenges facing biomaterials, and gives an outlook on future research directions. With biomaterials and technology continuing to be developed, we envision that the scaffolds could have an important impact on the application of tendon repair.
Dihydropyrimidine Dehydrogenase (DPD) as a Bridge between the Immune Microenvironment of Colon Cancers and 5-FU Resistance
Authors: Cui Zhongze , He Shuang , Wen Feifei , Lu Lizhen , Xu Lei , Wu Han , Wu Shuhua
Published: April 2023

Background: The purpose of the present study was to investigate the role of the 5-Fluorouracil (5-FU) resistance-related factor dihydropyrimidine dehydrogenase (DPD) in tumor immunity and prognosis and to study the relationship between drug resistance and the immune microenvironment of colon cancer. Methods: Bioinformatics methods were used to analyze the expression of DPD associated with prognosis, immunity, microsatellite instability, and tumor mutational burden in colon cancer. Immunohistochemistry (IHC) was used to detect DPD, MLH1, MSH2, MSH6, and PMS2 in 219 colon cancer tissue samples. Additional IHC analyses were conducted to detect CD4, CD8, CD20, and CD163 in 30 colon cancer tissue samples with the most extensive immune infiltration. The significance of the correlations and clinical significance of DPD with immune infiltration, immune-related markers, microsatellite instability-related indicators, and prognosis were evaluated. Results: The major findings of the present study are as follows: (1) DPD was expressed in tumor and immune cells and associated with certain immune cell-related markers, particularly M2 macrophages that expressed CD163. (2) DPD expression significantly and positively correlated with immune cell markers and immune checkpoints PD-1 and PD-L1. High expression of DPD in immune cells, but not tumor cells, led to increased immune infiltration. (3) High expression of DPD in immune and tumor cells induced 5-FU resistance and was associated with unfavorable prognosis. (4) DPD expression closely correlated with microsatellite instability and tumor mutational burden and led to resistance to 5-FU in patients with microsatellite instability. (5) Bioinformatics analyses revealed that DPD was enriched in immune-related functions and pathways such as activation of T cells and macrophages. Conclusions: DPD plays an important role in the immune microenvironment and drug resistance of colon cancers and their functional association.
Implementation of Project CBISp-EDP (Communicate, Build and Intensify Stakeholders’ Participation- Exemplified and Deepened Partnership) and External Stakeholders’ Participation
Authors: Gecolea Cincy Merly , Pagulayan Elsa D , Gecolea Peejay G
Published: April 2023

The study mainly focused on assessing the implementation of Project CBISp-EDP and external stakeholders’ participation in Calamba Bayside Integrated School. The study utilized a descriptive correlational research design. The respondents of the study were the 80 teachers and 99 parents of CBIS. Teacher-respondents were identified using a simple random sampling technique, while purposive sampling was used to identify the parent-respondents. Results of the study revealed that all teachers have the same level of observation in implementing Project CBISp-EDP. It also showed that external stakeholders participated in most school-initiated activities. Moreover, it also disclosed that the implementation of Project CBISp-EDP has a significant relationship with external stakeholders’ participation. It is recommended that the school consider the crafted action plan to strengthen stakeholders’ participation further.