University of Bío-Bío

Due to increased awareness and better diagnostic methods the reported prevalence of autism has increased dramatically. Despite this, to our knowledge, no bibliometric analysis on the topic has been conducted. The aim was to analyse the existing literature on autism prevalence in the Web of Science (WoS). A total of 958 articles on the prevalence of autism were retrieved and analysed from various WoS databases between the years 1976 and 2024. Biblioshiny, an R-Studio package, and Excel spreadsheets were used for the statistical processing of the data. Publications on autism prevalence showed an average annual growth rate of 5.73 % with the highest activity period occurring between 2015 and 2021. The most relevant articles were primarily published in the "Journal of Autism and Developmental Disorders," featuring prominent authors such as Fombonne and Durkin. Collaboration among authors has increased. Researched topics include psychiatric disorders, comorbid conditions, and risk factors, while the most frequent keywords reflect populations such as "children" and "adolescents". The United States is the most productive country, followed by the United Kingdom and China, highlighting the global relevance of autism research. This study provides a global perspective, acknowledging both historical and current points of significance in the major research areas and trends concerning the worldwide prevalence of autism. • Bibliometric analysis of global autism research. • Demonstrates trends in worldwide prevalence rates of autism. • Acknowledges historical and current points of significance in major research areas.

Antecedentes : Las creencias se caracterizan por influir en las actividades de aprendizaje que elaboran profesores en su práctica educativa, las cuales observadas desde el área de matemáticas inciden incluso en las formas de trabajar la resolución de problemas, características y conocimientos que integra un docente de esta especialidad durante el proceso de enseñanza de estas actividades. Objetivo : Determinar las creencias de profesores de matemáticas sobre la resolución de problemas y conocimientos culturales de estudiantes migrantes. Diseño : Se optó por un diseño de investigación cuantitativo de tipo descriptivo. Escenario y participantes : La muestra estuvo conformada por 131 profesores de matemáticas de primaria y secundaria de la ciudad de Chillán-Chile. Recopilación y análisis de datos : La información fue recopilada por medio de un cuestionario tipo likert, cuyas respuestas fueron analizadas en el software SPPS 25.0. Resultados : Se exponen diferencias estadísticamente significativas y creencias favorables de acuerdo del género, especialidad y años de docencia de los profesores de matemáticas. Conclusiones : Se establece que los participantes del estudio, los cuales laboran en aulas con presencia de estudiantes migrantes, desarrollan creencias de carácter positivas, frente a la posibilidad de integrar los conocimientos culturales de los estudiantes migrantes en las actividades de resolución, de problemas, situación que evidencia actitudes etnomatemáticas favorables para abordar el proceso de enseñanza en aulas culturalmente diversas desde las propuestas que plantea la etnomatemática.

In biogeography, related lineages often share similar range sizes and species richness due to inherited traits and shared geographic history. This expectation is based on phylogenetic niche conservatism and shared dispersal constraints. However, within the subfamily Laevilitorininae, this pattern is not observed: Laevilitorina shows broader distributions and higher species richness than Laevilacunaria despite similar developmental mode and habitat preferences. Combining multilocus genetic data, radular morphology and model-based historical biogeography, we aim to understand the origins of these disparities in range extent. The paraphyly detected in both Laevilitorina and Laevilacunaria genus indicates a more complex history than a simple older-younger genus contrast, with age and diversification distributed across four clades. Our dated analyses place the time to the most recent common ancestor (TMRCA) of Laevilitorininae at 52.2 Mya, with diversification within clades from the Miocene to Pleistocene. The sister genera show process-level contrasts: in Laevilitorina, broad ranges in some lineages are consistent with intermittent, macroalgal raft-mediated connectivity, whereas Laevilacunaria exhibits restricted ranges consistent with rare, storm-facilitated rafting that enables colonization without sustained gene flow. Overall, our findings support how stochastic long-distance dispersal and establishment can shape biogeographic patterns in the Southern Ocean and underscore the need to update systematic classifications.

Waterborne polyurethane (WBPU) dispersion, originally synthesized as an intermediate material for aerogel fabrication, was investigated as a polymeric extractant for the removal of divalent metal ions such as Cu(II), Co(II), Mn(II), and Ni(II) through a biphasic extraction approach. The produced WBPU exhibited notable extraction performance toward these metal ions, achieving up to 59.2% Cu(II) extraction at a 1:1 mass/volume ratio, pH 3, and under mild low-temperature conditions. Competitive extraction studies involving different divalent metal ions were performed together with extraction and selectivity experiments. The results demonstrated that Cu(II) was extracted with the highest selectivity (39.6%) with the WBPU matrix. The resulting WBPU–M(II) materials were characterized by FT-IR and UV–Vis spectroscopy. Additionally, a potential molecular structure based on density functional theory (DFT) calculations was proposed to explain the WBPU–Cu(II) interaction in the organic phase. The resulting molecular structure is characterized by square-planar complex formation between Cu(II) metal ions and the urethane units within the WBPU structure.

Este ensayo argumenta el reconocimiento y valorización de la identidad cultural de estudiantes migrantes como parte fundamental para una educación inclusiva. Mediante una revisión crítica, se abordan prejuicios y estereotipos que afectan su identidad, las tensiones que viven en la escuela frente a esta y el reconocimiento e integración de su capital cultural en la escuela. Por lo tanto, se propone incluir a las familias migrantes en el proceso de enseñanza, debido a que ellas son portadoras de un rico bagaje cultural y su experiencia migratoria enriquece el proceso educativo. Para ello, se sugiere una colaboración entre escuela y familias migrantes, considerando que las últimas son el eje central de la identidad cultural para escolares migrantes. Esta línea de acción busca una dinámica horizontal con comunicación bidireccional en la relación familia-escuela, dando lugar a una escuela intercultural, donde no solo se convive, sino que se aprende y se valora los conocimientos de la población migrante para abordar el proceso de enseñanza-aprendizaje. Todo lo anterior demuestra que el reconocimiento de las identidades de escolares migrantes no debe verse como una dificultad, sino como una oportunidad para fortalecer la relación familia-escuela, enriquecer las prácticas pedagógicas y avanzar en la construcción de una educación inclusiva.

Sports performance has been studied from the influence of fatigue in cognitive processes and decision-making, based on the integration of the contributions of neurophysiology and neuroimaging, which have allowed the implementation of alternative methods that measure the load generated on the central nervous system The objective was to analyze the trend and evolution of the scientific production of decision-making and cognitive factors to establish the relationship between neuroscience and sports performance, based on a bibliometric review in the Web of Science, Scopus and PubMed databases, including documents published between January 2010 and April. 2024. A review was carried out based on PRISMA recommendations, and a definitive sample of 409 documents was obtained. The results reflect that the greatest production occurs in research articles (82.15%) and review articles (15.15%). For the publication period, it is established that between 2019 and 2023 there was a considerable increase (41.21%). Between 2016 and 2020 there is a significantly higher number of citations than the average (n= 510). It is determined that Fortes, LS., and Russell, S., are the authors with the largest number of studies. The areas of knowledge that have dealt with the study of sports performance are Sport Sciences, Psychology, and Neuroscience. Compared to the journals that produce the most knowledge, they were located in Q1-Q2. The countries that produce the most knowledge are the United States, England, Australia, and Germany.

Introduction: Corporate Social Responsibility (CSR) and Circular Economy (CE) have established themselves as key approaches to organizational sustainability; however, the literature still presents fragmentation regarding their interrelationship. Objective: To analyze scientific output linking CSR and CE, identifying trends, actors, and gaps through bibliometric analysis. Methodology: A quantitative approach was applied to 221 articles indexed in Web of Science, using the VOSviewer and Bibliometrix tools to map co-authorship, co-citation, and keyword networks. Results: There has been sustained increase in publications since 2017, with Italy, China, and Spain leading the way. The Journal of Cleaner Production and Sustainability account for the highest productivity. The dominant themes are environmental management, innovation, and circular models. Discussion: The literature reflects progress toward CSR-CE convergence, although conceptual, methodological, and geographical gaps remain. Organizational barriers and the need to integrate financial and non-financial indicators are identified. Conclusions: It is essential to promote comparative end empirical studies, especially in Latin America, that incorporate common metrics and interdisciplinary approaches to strengthen the transition to sustainable business models.