Repositório Institucional da Universidade Estadual da Paraíba
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Spin Pumping in NbRe-PY and Nb-Py Bilayers
No full textTreballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2026, Tutor: Antoni García SantiagoBroadband ferromagnetic resonance measurements were performed on NbRe/Py and Nb/Py bilayers of nm thickness to characterize magnetic damping and interfacial spin transport. The extracted Gilbert damping values show no significant dependence on stacking order or on the choice of normal-state superconductor. A thickness-dependent analysis of the NbRe/Py bilayer reveals a clear increase in α with the non-magnetic layer thickness, consistent with spin-pumping-induced dissipation. These results provide a concise experimental picture of damping and spin transport in FM/NM systems involving superconducting materials in their normal stat
Confluences didactiques entre poésie et théâtre. Interpréter Maria-Mercè Marçal à partir de la conscience du corps et l'oralité
No full textLa poesía es un género que se amolda especialmente bien a la educación competencial. Sin embargo, aún hoy dista mucho de ser cultivado satisfactoriamente en las aulas de secundaria, tanto a nivel cuantitativo como cualitativo. Y si, además, nos referimos a la poesía escrita por mujeres, esta marginación del género resulta extremadamente marcada: en la mayoría de libros de texto, la presencia ya no de poetas, sino de escritoras en general, representa una parte ínfima de la nómina de autores estudiados. Considerando esta situación anómala, nos propusimos desarrollar una propuesta didáctica que, destinada a alumnos de 1r curso de la ESO, introdujera el género poético al estudiantado de secundaria. Dicha propuesta partió de la obra de Maria-Mercè Marçal, una de las autoras líricas contemporáneas más emblemáticas de la literatura catalana. Su condición de mujer homosexual, su consciencia del cuerpo y la calidad de su obra poética resultaron muy valiosas desde el punto de vista didáctico
The construction of the ethnic-racial identity of the black child: the role of schooling in early childhood education
No full textThis research focused on the theme of identity within the context of ethnic and racial relations in the schooling process in Early Childhood Education. Based on this idea, the general objective: To analyze how the construction of the ethnic-racial identity of Black children occurs during the schooling process in Early Childhood Education, and the specific objectives classified as: understanding which relationships are experienced by children in their daily school life and contribute to the construction of ethnic-racial identity; investigating which educational practices are carried out by teachers in order to implement Law 10.639/03 (BRAZIL, 2003), and identifying which interventions, proposals, projects, and events the school carries out that contribute to the teaching of ethnic-racial relations throughout the school year. Therefore, it is highlighted that this study is of great social relevance, since it provides na understanding of how this identity construction occurs for Black children today, who are still victims of prejudice and racial discrimination, especially in schools. However, to understand these discussions, it was necessary to rely on the theoretical contributions of the authors André (2008), Gomes (2003), Munanga (2005), Del Priori (1999), Müller e Carvalho (2009), Kulmann Jr. (2000), Sarmento (2005), and Cavalleiro (2000). Thus, this research adopts a qualitative methodological approach in education,
using field research and non-participant observation, where the subjects were five teachers and their respective classes, and two administrators, one from each school, all from early childhood education located in the Municipality of Dona Inês, Paraíba, Brazil. Therefore, the results indicate that the ethno-racial construction of the black child occurs through various means, including: representative, didactic, and pedagogical resources, in addition to the conflict relationships experienced by the children, the prejudice and racial discrimination that are still present, especially in the classroom. Furthermore, the results highlighted the need for continuing education, specifically on this topic, for both teachers and administrators, since initial training, although supportive, does not address these discussions in practice.A pesquisa focalizou a temática da identidade no contexto das relações étnico-raciais no processo de escolarização na Educação Infantil. Partindo dessa ideia, formulou o objetivo geral: Analisar como ocorre a construção da identidade étnico-racial da criança negra, durante o processo de escolarização na Educação Infantil, e os específicos classificados em: compreender quais relações são vivenciadas pelas crianças no cotidiano escolar que contribuem com a construção da identidade étnico-racial; investigar quais práticas educativas são realizadas pelos/as docentes, no intuito de implementar a Lei 10.639/03 (BRASIL, 2003), e identificar, quais intervenções, propostas, projetos e eventos a escola realiza que contribuem para o ensino das relações étnico-raciais ao longo do período letivo. Diante disso, destaca-se que é de grande relevância social esse estudo. Uma vez que, traz a compreensão sobre como ocorre essa construção identitária das crianças negras atualmente, sendo estas ainda vítimas de preconceito e discriminação racial, principalmente nas escolas. Todavia, para a compreensão dessas discussões, foi necessário contar com o aporte teórico dos/das autores(as) André (2008), Gomes (2003), Munanga (2005), Del Priori (1999), Müller e Carvalho (2009), Kulmann Jr. (2000), Sarmento (2005), Cavalleiro (2000). Assim, a presente pesquisa assume um cunho metodológico qualitativo em educação, fazendo uso da pesquisa de campo e observação não participante, onde os sujeitos foram cinco professores(as) e suas respectivas turmas, e dois/as gestores(as), uma
de cada escola, todos/as da educação infantil localizada no Município de Dona Inês/PB. Logo, como resultados aponta-se que a construção étnico-racial da criança negra ocorre através de diversos meios, sendo estes: recursos representativos, didáticos, pedagógicos, somando as relações de conflito vivenciadas pelas crianças, ao preconceito e a discriminação racial que ainda são presentes, principalmente em sala de aula. Além disso, os resultados evidenciaram a necessidade de formação continuada, especificamente sobre essa temática, tanto para os/as professores(as), quanto para os/as gestores(as), pois a formação inicial embora tenha dado suporte, não contempla essas discussões na prática
Intervenció de conservació-restauració de la taula central del retaule de Sant Sebastià de Sant Jeroni de la Murtra(Badalona). Estudi de la tècnica i els materials emprats per l’artista/es.
No full textLa intervenció de conservació-restauració de la taula central del retaule de Sant Sebastià del monestir de Sant Jeroni de la Murtra (Badalona), ha permès dur a terme un estudi detallat de la tècnica pictòrica i dels materials originals emprats en la seva execució, així com identificar els estrats afegits en intervencions històriques posteriors. Les dades analítiques obtingudes constitueixen una aportació significativa per a la recerca sobre l’autoria de l’obra
Desafios e aprendizagens no estágio supervisionado IV em geografia: uma análise das experiências formativas na E.E.E.F. deputado Gustavo Amorim em Guarabira-PB.
No full textSupervised Internship is a space for immersion in teaching practice, where intellectual concerns and academic aspirations emerge from school experience. In this context, the objective of this work is to analyze the challenges of Supervised Internship IV and its contributions to the development of teaching competences through pedagogical practice at E.E.E.F. Deputado Gustavo Amorim, in Guarabira, Paraíba, Brazil. The methodology was configured as a theoretical-empirical, qualitative approach, drawing on authors such as Pimenta and Lima (2012), Saiki and Godoi (2007), Silva and Gaydeczka (2024), among others. In addition, an interview was conducted with Geography undergraduates from UEPB (Campus III). In the context of Supervised Internship IV, it was possible to construct different types of knowledge necessary for professional practice (teacher education), as well as to support students in the teaching-learning process. The production of group dialogues and debates, the creation of a geographic bingo game (playful activity), and the use of new technologies in teaching practice promoted the active participation of the students in class, broadening their knowledge and fostering learning. Therefore, the proposed pedagogical interventions contributed to the continuing education of the subject teacher, expanding her knowledge of new methodologies and resources that can be used in the classroom.O Estágio Supervisionado é um espaço de imersão na prática docente, onde emergem inquietações intelectuais e anseios acadêmicos à vivência escolar. Diante desse contexto, o objetivo do presente trabalho visa analisar os desafios do Estágio Supervisionado IV e suas contribuições para o desenvolvimento de competências docentes por meio da prática pedagógica na E.E.E.F. Dep. Gustavo Amorim em Guarabira-PB. A metodologia configurou-se em uma abordagem qualitativa, de natureza descritiva, fundamentada em observação participante, havendo a necessidade de realizar o levantamento teórico a partir de Pimenta e Lima (2012), Saiki e Godoi (2007), Silva e Gaydeczka (2024), entre outros. Foi desenvolvida uma entrevista com os licenciandos em Geografia da UEPB (Campus-III). No contexto de realização do presente estágio IV, conseguiu-se construir diversos conhecimentos necessários para a prática profissional (formação docente), além de auxiliar os alunos no processo de ensino-aprendizagem. A produção dos diálogos e debates em grupo, a confecção do bingo geográfico (ludicidade), a utilização de novas tecnologias na prática de ensino proporcionaram participação ativa dos alunos da turma nas aulas, ampliando seus conhecimentos e favorecendo a aprendizagem. Portanto, as intervenções pedagógicas propostas contribuíram para a formação continuada da professora da disciplina, expandindo o seu conhecimento relacionado a novas metodologias e recursos que podem ser empregados em sala de aula
101 contact twins in gypsum experimentally obtained from calcium carbonate enriched solutions: mineralogical implications for natural gypsum deposits.
No full textGypsum twins are frequently observed in nature, triggered by a wide array of impurities that are present in their depositional environments and that may exert a critical role in the selection of different twin laws. Identifying the impurities able to promote the selection of specific twin laws has relevance for geological studies aimed at interpreting the gypsum depositional environments in ancient and modern deposits. Here, the effect of calcium carbonate (CaCO 3) on gypsum (CaSO 4 2H 2O) growth morphology has been investigated by performing temperature-controlled laboratory experiments with and without the addition of carbonate ions. The precipitation of twinned gypsum crystals has been achieved experimentally (101 contact twin law) by adding carbonate to the solution, and the involvement of rapidcreekite (Ca 2SO 4 CO 3 4H 2O) in selecting the 101 gypsum contact twin law was supported, suggesting an epitaxial mechanism. Moreover, the occurrence of 101 gypsum contact twins in nature has been suggested by comparing the natural gypsum twin morphologies observed in evaporitic environments with those obtained in experiments. Finally, both orientations of the primary fluid inclusions (of the negative crystal shape) with respect to the twin plane and the main elongation of sub-crystals that form the twin are proposed as a fast and useful method (especially in geological samples) to distinguish between the 100 and 101 twin laws. The results of this study provide new insights into the mineralogical implications of twinned gypsum crystals and their potential as a tool to better understand natural gypsum deposits
Platforms, datafication and new governance of education: An analytical framework on digital sovereignty
No full textEste artículo explora el potencial analítico del constructo de soberanía digital para el estudio de los procesos de plataformización y datificación en la educación. En el contexto europeo, la soberanía digital ha ganado centralidad política, impulsada por preocupaciones sobre la autonomía frente a las Big Tech de Silicon Valley, la seguridad y la presión competitiva de la economía global. Paralelamente, la investigación educativa ha documentado cómo las plataformas digitales reconfiguran la gobernanza y las prácticas pedagógicas del profesorado. Ante este escenario, el artículo propone una operativización del concepto de soberanía digital en cuatro actividades de gobernanza (posesión, provisión, regulación y uso) y tres dimensiones de análisis (infraestructuras, datos y servicios digitales), que pueden combinarse de manera compleja con múltiples escalas, actores y/o instituciones de coordinación. Esta propuesta se fundamenta en una revisión crítica de la literatura sobre tecnologías digitales y educación, y se concreta en un modelo analítico diseñado para examinar sistemas educativos en contextos digitalizados. A modo de ejemplo, el modelo se aplica al uso de Google Workspace for Education en el sistema educativo público de Cataluña, e ilustra cómo se distribuye el poder digital entre actores públicos y privados. El análisis muestra una soberanía digital parcial y fragmentada en las tres dimensiones analizadas (infraestructuras, datos y servicios). Por último, esta propuesta analítica permite visibilizar disputas políticas en el ámbito educativo y ofrece herramientas conceptuales útiles para repensar la soberanía, la dependencia y la gobernanza en la era de las plataformas digitales
Rheological study of pullulan-pectin mixtures to prepare gel beads using the drip method and evaluation as gallic acid release systems.
No full textPullulan (PUL) is a polysaccharide that can form gels using sodium trimetaphosphate (STMP). This gelationoccurs at basic pH and has very slow kinetics, so that gel beads cannot be formed by the dripping method sincePUL diffuses towards the medium before it can gel. To accelerate the gelling process and be able to obtainpullulan beads, hybrid gels were formed, mixing PUL with pectin (PEC). Then, STMP was added to gel the PUL,and Ca2+ was separately added to gel the PEC for comparative purposes. In both cases, the minimum concentrationof gelling agent to obtain a gel was reduced by 90%. The gelation of these STMP-hybrid gels waspractically instantaneous, thus allowing the production of beads by dripping the polysaccharide solution in anaqueous STMP solution. The PUL-PEC gels were characterized by FT-IR, which confirmed the junction of thePUL-PEC molecules by hydrogen bonds in the gel, as well as de-esterification of methoxyl groups and ionizationof acid groups. The addition of PEC did not affect the swelling degree of the PUL gel, probably since it wasgoverned by STMP-PUL junctions, but it increased the water holding capacity, which was related to the presenceof more -OH groups to retain water by hydrogen bonds. PUL-PEC beads loaded with gallic acid were successfullyprepared by the dripping method to evaluate their suitability as delivery systems for active ingredients. Therelease profiles show that they were systems comparable to beads formed by other biopolymers and thereforecapable of adequately releasing active ingredients
Bridging the genotype-phenotype gap for a Mediterranean pine by semi-automatic crown identification and multispectral imagery
No full textProgress in high-throughput phenotyping and genomics provides the potential to under-stand the genetic basis of plant functional differentiation. We developed a semi-automaticmethodology based on unmanned aerial vehicle (UAV) imagery for deriving tree-level pheno-types followed by genome-wide association study (GWAS).
An RGB-based point cloud was used for tree crown identification in a common garden of Pinus halepensis in Spain. Crowns were combined with multispectral and thermal orthomo-saics to retrieve growth traits, vegetation indices and canopy temperature. Thereafter, GWASwas performed to analyse the association between phenotypes and genomic variation at 235single nucleotide polymorphisms (SNPs).
Growth traits were associated with 12 SNPs involved in cellulose and carbohydratemetabolism. Indices related to transpiration and leaf water content were associated with sixSNPs involved in stomata dynamics. Indices related to leaf pigments and leaf area were associ-ated with 11 SNPs involved in signalling and peroxisome metabolism. About 16–20% of traitvariance was explained by combinations of several SNPs, indicating polygenic control of mor-pho-physiological traits.
Despite a limited availability of markers and individuals, this study is provides a successfulproof-of-concept for the combination of high-throughput UAV-based phenotyping withcost-effective genotyping to disentangle the genetic architecture of phenotypic variation in awidespread conife
The material reality of the carolingian monasteries in the catalan counties through written sources. a re‑reading of the archive documentation from an archaeological point of view
No full text[cat] Tenint en compte l’escàs coneixement arqueològic que tenim sobre els monestirs dels comtats catalans en època carolíngia, els documents d’arxiu, tot i el seu laconisme, constitueixen una font bàsica per aproximar-nos a la seva realitat material. Partint d’aquesta premissa, en el present article analitzaré totes les referències a l’estructura d’aquests cenobis i la seva materialitat que apareixen en la documentació escrita dels segles IX i X. D’aquesta manera, aportaré noves dades per reflexionar sobre com es concebia un centre monàstic en aquell període, quina era la seva topografia interna i a quin ideal monàstic responien[eng] Considering the scant archaeological knowledge we have about the monasteries of the Catalan counties in the Carolingian era, the early medieval charters, despite their laconicism, constitute a basic source to approach their material reality. Starting from this premise, in this paper, I will analyse all the references to the structure of these monasteries and their materiality that appear in the written sources of the 9th and 10th centuries. Doing so, I will provide new data to think about the conception of monastic centres in that period, their internal topography and the monastic ideal behind them