Repositório Institucional da Universidade Estadual da Paraíba
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Sense memòria no hi ha futur
No full text«Sense memòria no hi ha futur», aquest és el missatge que més de cent joves
historiadors van voler dirigir tant al món acadèmic i cultural coma la societat catalana en general al final de les III Jornades de Joves Historiadors i Historiadores, les quals van celebrar-se a Barcelona els dies 13, 14 i 15 de març del 2003 al Museu d'Historia de Catalunya
Restauration des cours d'eau dans la région méditerranéenne de l'Espagne après des inondations à travers trois études de cas différentes
No full text[eng] River systems are among the environments that have been mostly, highly, and intensively altered and modified by mankind. The extent of such extreme modifications and alterations of river systems, especially those that flow through urban areas, forms part of what we globally call the Anthropocene, which is defined by the substantial and sometimes irreversible modification of the planet’s surface by human action.But it is not just that. Human societies have realized that the conservation of nature, and consequently the health of river spaces, also provides ecosystemic benefits and improves the quality of life of inhabitants, especially in cities. The recovery of altered river spaces to reintroduce nature into cities is also part of the Anthropocene, as it is human intervention once again modifying a previously modified space.The debate at this point is to choose the type of intervention we want to apply to an altered river system.The recovery of river spaces is diverse, and it depends exclusively on the objective set, which in turn depends on the situation that has led to considering a restoration.The aim of this paper is to show different examples of restoration in the Mediterranean side of the Iberian Peninsula, where interventions within river channels were all meant to improve the life quality of inhabitants as well as the fluvial ecosystem. However, different approaches were considered, and discussion about whether these examples are a “greening” or a real “river restoration” arises. Some of the cases are thought to avoid further flooding, while others seek to transform the fluvial space into leisure and open spaces for inhabitants’ amusement.The conclusion is that, in terms of river systems, the Anthropocene encompasses everything. The examples shown tell us that it was humans who altered the river system and now want to improve it to reduce or mitigate flood hazards, and re-naturalize it, but in no case can we avoid our footprint. Therefore, what we are doing now is another modification on top of modifications, which ultimately continues to be part of this Anthropocene period.[fre] Les systèmes fluviaux comptent parmi les environnements les plus profondément, fortement et intensivement modifiés par l’homme. L’ampleur de ces transformations extrêmes des cours d’eau, en particulier ceux qui traversent les zones urbaines, fait partie de ce que nous appelons globalement l’Anthropocène, défini par la modification substantielle et parfois irréversible de la surface de la planète par l’action humaine. Mais ce n’est pas tout. Les sociétés humaines ont compris que la conservation de la nature, et par conséquent la santé des espaces fluviaux, procure également des bénéfices écosystémiques et améliore la qualité de vie des habitants, notamment en ville. La reconquête des espaces fluviaux altérés pour réintroduire la nature dans les villes fait aussi partie de l’Anthropocène, puisqu’il s’agit encore d’une intervention humaine modifiant un espace déjà transformé. Le débat, à ce stade, consiste à choisir le type d’intervention que nous voulons appliquer à un système fluvial altéré. La restauration des espaces fluviaux est diverse et dépend exclusivement de l’objectif fixé, lequel dépend à son tour de la situation qui a conduit à envisager une restauration. L’objectif de cet article est de présenter différents exemples de restauration sur le versant méditerranéen de la péninsule Ibérique, où les interventions dans les chenaux fluviaux visaient toutes à améliorer la qualité de vie des habitants ainsi que l’écosystème fluvial. Cependant, différentes approches ont été envisagées, et la discussion s’ouvre sur la question de savoir si ces exemples relèvent d’un simple «verdissement» ou d’une véritable «restauration fluviale». Certains cas visent à prévenir de futures inondations, tandis que d’autres cherchent à transformer l’espace fluvial en lieux de loisirs et espaces ouverts pour le plaisir des habitants.
La conclusion est que, en matière de systèmes fluviaux, l’Anthropocène englobe tout. Les exemples présentés montrent que ce sont les humains qui ont altéré le système fluvial et qui souhaitent maintenant l’améliorer pour réduire ou atténuer les risques d’inondation et le renaturaliser, mais en aucun cas nous ne pouvons effacer notre empreinte. Ce que nous faisons aujourd’hui constitue donc une nouvelle modification par-dessus des modifications, ce qui continue finalement à faire partie de cette période de l’Anthropocène
Memòries de les guerres carlines
No full textLes guerres carlines constitueixen un element definitori del segle XIX i un episodi clau de la dialèctica entre revolució i contrarevolució que va marcar l’inici de l’edat contemporània. Més enllà del conflicte armat, les carlinades van continuar presents durant dècades en les societats que les havien viscut, a través de memòries personals, familiars i, sobretot, mitjançant la construcció d’una memòria pública i cultural orientada a donar sentit al present. Aquest monogràfic se centra en l’estudi de com aquests fets traumàtics van ser recordats, interpretats i commemorats, així com en els usos socials i polítics que se’n van derivar, una dimensió encara poc conreada historiogràficament
Factors that promote student school engagement and their relationship with learning personalisation strategies
No full textLa implicación del alumnado en las actividades escolares es un factor crucial para su éxito académico. Sin embargo, todavía existen dudas sobre qué factores personales y contextuales influyen en dicha implicación. Implementamos un cuestionario ad hoc que administramos a 2737 estudiantes procedentes de 14 centros educativos de Cataluña, diversos en función de su titularidad, la etapa y el nivel socioeconómico, y analizamos los datos mediante análisis descriptivo y pruebas estadísticas (ANOVA, T de Student, U de Mann-Whitney y Kruskal-Wallis). Los resultados muestran que los niveles de implicación escolar dependen del género, la edad y otras variables personales y contextuales, y que las estrategias de personalización son clave. Las conclusiones ofrecen orientaciones para que los docentes fomenten aprendizajes con mayor valor y sentido personal
La gobernanza política de la pandemia: el modelo europeo frente al populismo, y el autoritarismo
No full textEn este artículo se lleva a cabo una reflexión en torno a algunas de las muchas dimensiones de la gobernanza política de la pandemia que se han considerado significativas. En este marco, el análisis ha tenido en cuenta en primer lugar las diferencias de planteamiento entre los países de la Unión Europea y los que cuentan con gobiernos autoritarios o populistas, y, en segundo lugar, sobre algunas prácticas y tentaciones –y sobre los riesgos a ellas vinculados– de corte populista y autoritario que también se han producido dentro del mismo marco comunitario
Autonomous Mobile Robot for Traffic Sign Detection Using YOLO and a 3D Depth Camera with ROS 2 and Docker-Based Deployment
No full textTreballs Finals de Grau d'Enginyeria Informàtica, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2026, Director: Manel Puig i Vidal[en] This Final Degree Project extends and improves a reactive navigation system based on a computer vision approach and focused on traffic sign detection. Specifically, it integrates a 3D depth camera into the detection pipeline to obtain real-world distances, and enable the control over a LIMO’s robot navigation system. Moreover, it addresses a latency issue derived from TheConstruct–a remote development platform centred on ROS–, by building a local development environment based on Docker and ROS2 Humble. Finally, it includes a set of code optimizations that not only removes the existing coupling in favour of a clean architecture but also increases the reliability of the distributed and concurrent system; improving the project’s modularity, extensibility, and robustness.
[ca] Aquest Treball Final de Grau amplia i millora un sistema de navegació reactiva centrat en la detecció de senyals de trànsit mitjançant visió artificial. En concret, integra una càmera de profunditat 3D en el pipeline de detecció per obtenir distàncies reals de forma precisa, cosa que permet el control de la navegació d’un robot LIMO. A més, planteja la solució a un problema de latència derivat de la plataforma remota TheConstruct mitjançant la construcció d’un entorn de desenvolupament local basat en Docker i ROS2 Humble. Finalment, es realitzen una sèrie d’optimitzacions en el codi que no només eliminen l’acoblament existent en favor d’una arquitectura més neta, sinó que augmenten la fiabilitat del sistema distribuït i concurrent; augmentant la modularitat, extensibilitat i robustesa del projecte.
[es] Este Trabajo Final de Grado extiende y mejora un sistema de navegación reactiva centrado en la detección de señales de tráfico mediante visión artificial. En concreto, integra una cámara de profundidad 3D en el pipeline de detección para obtener distancias reales de forma precisa, permitiendo así el control de la navegación de un robot LIMO. Además, plantea una solución a un problema de latencia derivado de la plataforma remota TheConstruct mediante la construcción de un entorno de desarrollo local basado en Docker y ROS2 Humble. Finalmente, se realizan una serie de optimizaciones en el código que no solo eliminan el acoplamiento existente en favor de una arquitectura más limpia, sino que aumentan la fiabilidad del sistema distribuido y concurrente; incrementando la modularidad, extensibilidad y robustez del proyecto
Automating task design: bridging the gap between second language research and L2 instruction
No full textThe present study addresses the issue of the transfer from second language acquisition (SLA) research to second and foreign language (L2) instruction, particularly within the context of Task-Based Language Teaching (TBLT). The main goal of this article is to show how technology, particularly the web-based tool taskGen (https://taskgen.eu), which primarily serves to create teaching materials, also functions as a mediator for transfer and provides valuable information on teaching practices, teachers' needs, pedagogical strategies, and L2 task design. This article is organised as follows. Firstly, a web-based tool that assists and trains teachers in L2 task design is presented, along with the instantiation and integration of natural language processing (NLP) resources in the tool; later, we show how quantitative information obtained from the massive use of the tool through data analytics can be combined with qualitative methods such as interviews, observations, think aloud protocols, questionnaires, case studies, and transcripts to generate research. Automatic (quantitative) data collection gathers information of the teaching contexts, task aims, task flow structures, focus on form options, and the access and time on help files. Not only does the collected information feed back to the tool, but it also contributes to understanding teachers' design choices and patterns, and to exploring the intersection between SLA and TBLT theory and task design practises. Qualitative analysis is being conducted and oriented toward teachers’ experiences during task design. Finally, we present the future lines of research that we anticipate will be carried out with the further use and development of taskGen
Os benefícios do lúdico no processo de ensino-aprendizagem da cartografia escolar
No full textO presente trabalho analisa os benefícios das atividades lúdicas no ensino-
aprendizagem da cartografia escolar no ensino fundamental. O objetivo principal é
demonstrar como jogos, brincadeiras e dinâmicas tornam o aprendizado mais
significativo e atrativo para os alunos. A metodologia envolveu revisão
bibliográfica e estudo de caso com turmas do 7º ano de uma Escola de ensino
fundamental, utilizando o jogo Batalha Naval e a produção de croquis como
recursos didáticos. Os resultados evidenciam que o uso do lúdico estimula a
participação, criatividade e compreensão dos conteúdos cartográficos, superando
desafios tradicionais do ensino teórico. Conclui-se que a ludicidade é uma
estratégia eficaz para potencializar o interesse e o desempenho dos estudantes
em geografia, recomendando-se sua ampliação nas práticas pedagógicas
Decoding the Conformation of Polylactic Acid in Block Copolymer Micelles
No full textUnderstanding how molecular features dictate the self-assembly of amphiphilic block copolymers into well-defined nanostructures is essential for the rational design of advanced soft materials. However, the large number of interdependent parameters involved, such as particle size, aggregation number, interfacial curvature, and molecular weight, makes it challenging to establish general design principles. Here we establish a scaling-based framework for PEG-b-PLA micelles with a fixed hydrophilic–hydrophobic ratio. Systematic variation of molecular weights enables precise control of micelle size and aggregation number, quantified by DLS, cryo-TEM, and MALS
Diet-to-female and female-to-pup isotopic discrimination in South American sea lions
No full textRationale: The use of accurate, species-specific diet-tissue discrimination factors is a critical requirement when applying stable isotope mixing models to predict consumer diet composition. Thus, diet-to-female and female-to-pup isotopic discrimination factors in several tissues for both captive and wild South American sea lions were estimated to provide appropriate values for quantifying feeding preferences at different timescales in the wild populations of this species.
Methods: Stable carbon and nitrogen isotope ratios in the blood components of two female-pup pairs and females' prey muscle from captive individuals were determined by elemental analyzer/isotope ratio mass spectrometry (EA/IRMS) to calculate the respective isotopic discrimination factors. The same analysis was carried out in both blood components, and skin and hair tissues for eight female-pup pairs from wild individuals.
Results: Mean diet-to-female Δ13C and Δ15N values were higher than the female-to-pup ones. Pup tissues were more 15N-enriched than their mothers but 13C-depleted in serum and plasma tissues. In most of the tissue comparisons, we found differences in both Δ15N and Δ13C values, supporting tissue-specific discrimination. We found no differences between captive and wild female-to-pup discrimination factors either in Δ13C or Δ15N values of blood components.
Conclusions: Only the stable isotope ratios in pup blood are good proxies of the individual lactating females. Thus, we suggest that blood components are more appropriate to quantify the feeding habits of wild individuals of this species. Furthermore, because female-to-pup discrimination factors for blood components did not differ between captive and wild individuals, we suggest that results for captive experiments can be extrapolated to wild South American sea lion populations