1,147 research outputs found
Three-feature model to reproduce the topology of citation networks and the effects from authors' visibility on their h-index
Various factors are believed to govern the selection of references in
citation networks, but a precise, quantitative determination of their
importance has remained elusive. In this paper, we show that three factors can
account for the referencing pattern of citation networks for two topics, namely
"graphenes" and "complex networks", thus allowing one to reproduce the
topological features of the networks built with papers being the nodes and the
edges established by citations. The most relevant factor was content
similarity, while the other two - in-degree (i.e. citation counts) and {age of
publication} had varying importance depending on the topic studied. This
dependence indicates that additional factors could play a role. Indeed, by
intuition one should expect the reputation (or visibility) of authors and/or
institutions to affect the referencing pattern, and this is only indirectly
considered via the in-degree that should correlate with such reputation.
Because information on reputation is not readily available, we simulated its
effect on artificial citation networks considering two communities with
distinct fitness (visibility) parameters. One community was assumed to have
twice the fitness value of the other, which amounts to a double probability for
a paper being cited. While the h-index for authors in the community with larger
fitness evolved with time with slightly higher values than for the control
network (no fitness considered), a drastic effect was noted for the community
with smaller fitness
Structure-semantics interplay in complex networks and its effects on the predictability of similarity in texts
There are different ways to define similarity for grouping similar texts into
clusters, as the concept of similarity may depend on the purpose of the task.
For instance, in topic extraction similar texts mean those within the same
semantic field, whereas in author recognition stylistic features should be
considered. In this study, we introduce ways to classify texts employing
concepts of complex networks, which may be able to capture syntactic, semantic
and even pragmatic features. The interplay between the various metrics of the
complex networks is analyzed with three applications, namely identification of
machine translation (MT) systems, evaluation of quality of machine translated
texts and authorship recognition. We shall show that topological features of
the networks representing texts can enhance the ability to identify MT systems
in particular cases. For evaluating the quality of MT texts, on the other hand,
high correlation was obtained with methods capable of capturing the semantics.
This was expected because the golden standards used are themselves based on
word co-occurrence. Notwithstanding, the Katz similarity, which involves
semantic and structure in the comparison of texts, achieved the highest
correlation with the NIST measurement, indicating that in some cases the
combination of both approaches can improve the ability to quantify quality in
MT. In authorship recognition, again the topological features were relevant in
some contexts, though for the books and authors analyzed good results were
obtained with semantic features as well. Because hybrid approaches encompassing
semantic and topological features have not been extensively used, we believe
that the methodology proposed here may be useful to enhance text classification
considerably, as it combines well-established strategies
O EXAME DE SUFICIÊNCIA CONTÁBIL E A PERCEPÇÃO DOS PROFESSORES DO CURSO DE CIÊNCIAS CONTÁBEIS
A pesquisa tem por objetivo descrever a percepção dos docentes do Curso de Ciências Contábeis de uma Instituição de Ensino Superior privada do Estado de Santa Catarina quanto ao Exame de Suficiência Contábil aplicado pelo Conselho Federal de Contabilidade - CFC, como requisito para que os egressos do referido curso possam desempenhar suas funções. Quanto à abordagem metodológica esse estudo caracteriza-se como descritivo, utilizando a pesquisa bibliográfica, sendo que a abordagem do problema abrange principalmente o método qualitativo. Além da leitura realizada na bibliografia pesquisada, a técnica de coleta de dados para a pesquisa foi a aplicação de um questionário dirigido aos professores responsáveis pelos conteúdos de formação básica e de formação profissional do Curso de Ciências Contábeis, atingindo o total de vinte e dois docentes. O questionário na sua maioria foi de questões fechadas e duas questões abertas. O resultado da pesquisa demonstrou que com a percepção e colaboração dos professores, o Curso de Ciências Contábeis pode oferecer novas metodologias e práticas de ensino aos futuros profissionais, destacando-se entre elas a elaboração das provas com o mesmo grau de dificuldade exigido pelo CFC, inclusão de questões de Exames anteriores em suas atividades e realização de simulados periodicamente
Estudio de la mitofagia en respuesta a un programa de entrenamiento de fuerza en personas mayores = Study of mitophagy in response to a strength training program for older people
365 p.Introducción: El envejecimiento provoca cambios fisiológicos, morfológicos y funcionales en el organismo que resulta en disminución de la capacidad física y pérdidas en las funciones fisiológicas. El entrenamiento de fuerza (EF), a su vez, es una estrategia ampliamente empleada para intentar frenar los efectos degenerativos del envejecimiento, especialmente, sobre la morfología y la capacidad funcional. Sin embargo, la literatura científica no deja claro si un programa de EF es capaz de promover cambios en la capacidad mitofágica de las personas mayores, lo que se convirtió en la principal pregunta de investigación del presente trabajo.
Objetivo: Analizar los efectos de un programa de EF sobre las diferentes manifestaciones de la fuerza muscular, los indicadores de aptitud funcional, la composición corporal y las proteínas de señalización de la mitofagia en personas mayores.
Metodología: 48voluntarios con edad entre 70 y 77 años fueron divididos en dos grupos, control (GC: sin EF) y fuerza (GF: con EF). Fueron evaluados por medio de pruebas de fuerza máxima (dinámica, isométrica y potencia), capacidad funcional, composición corporal y extracción de sangre para análisis de las proteínas de mitofagia, antes y después de la realización de un programa de EF. El entrenamiento fue compuesto por 8 ejercicios, para los principales grupos musculares, ejecutados con intensidad de 5-8 en la escala OMNI-RES, en 3 series de 8-12 repeticiones. Para la comparación intragrupo fue utilizada la prueba de Wilcoxon y para la comparación intergrupos fue utilizada la prueba de Mann-Whitney. La prueba D de Cohen fue utilizada para verificar el tamaño del efecto.
Resultados: Los principales resultados encontrados fueron que los participantes del GF mejoraron la fuerza de los miembros superiores e inferiores, la potencia de los miembros inferiores y la capacidad funcional tras las 8 semanas de entrenamiento. Además, fueron observadas mejoras significativas en las proteínas PGC-1α, BNIP3 y NIX en el GF, en comparación con el GC.
Conclusiones: El programa de EF realizado por las personas mayores de 70 años produjo incrementos de la fuerza/potencia muscular y de la capacidad funcional, además de producir cambios positivos en las proteínas de macroautofagia, biogénesis mitocondrial y mitofagia, especialmente, en aquellas relacionadas con la vía NIX/Bnip3 de la mitofagia
Intersections of immigration and sexual and reproductive health : an umbrella literature review with a focus on health equity
Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).Identifying the opportunities and barriers of promoting and fulfilling the sexual health rights of migrants remains a challenge that requires systematic assessment. Such an assessment would include estimating the influence of acculturation processes on sexual and reproductive health, and mapping intersectional inequities that influence migrants’ sexual and reproductive health in comparison with the native population. The aim of this research was to locate, select, and critically assess/summarize scientific evidence regarding the social, cultural, and structural factors influencing migrants’ sexual and reproductive health outcomes in comparison with native population. An umbrella review of systematic reviews and/or meta-analyses, following preferred reporting items for systematic reviews and meta-analysis (PRISMA) standards was undertaken. Medline, Scopus, Web of Science, and the Cochrane Database of Systematic Reviews were searched from their start date until June 2019. The quality of the included articles was determined using the assessment of multiple systematic reviews tool (AMSTAR 2). From the 36 selected studies, only 12 compared migrant with native populations. Overall, the findings indicated that migrants tend to underuse maternal health services and have an increased risk of poor sexual and reproductive health outcomes. Specific intersectional inequities were identified and discussed.info:eu-repo/semantics/publishedVersio
E-business strategies for destination management organisations
Destinations Management Organizations (DMO) are the organizations responsible for management and/or marketing of destinations. With the advent of Internet and the easy way in which anyone can communicate with the consumer, the role of DMO as intermediaries is based on the need to add value. If DMO actively join e-business they can add value to the consumer but also to suppliers. Destination Management Systems (DMS) are a collection of computerized information about a destination, accessible in an interactive way. The concept is defined as a synonym of the technological infrastructure of a DMO. The present study aims to present the conceptual framework of an investigation intended to define the main factors behind the success of DMS. The research model is based on the assumption that success factors fit in three spheres of action: the dynamics of the system implementation within a DMO, the very specific features of DMS and the organizational environment in the destination
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