139 research outputs found

    Evaluation of post-graduate programs using a network data envelopment analysis model

    Get PDF
    Despite standard Data Envelopment Analysis (DEA) models having been widely used in assessing efficiency in education, a few studies use Network DEA (NDEA) models in educational evaluation. In this paper, we proposed an alternative to the official evaluation performed every three years by CAPES (Brazilian agency for post-graduation programs regulation) using an NDEA model. The use of NDEA is justified because depending on the point of view, some variables can be considered either inputs or outputs. The use of NDEA avoids the need to decide whether a variable is an input or output of the entire process. This happens because a variable can be both an output for one stage and an input for another. Our relational NDEA model computes both productivity and quality assessments together with global efficiency using bibliometric data.A pesar de que los modelos estándar del Análisis Envolvente de Datos (DEA) han sido ampliamente utilizados en la evaluación de la eficiencia en educación, existen pocos estudios que utilizan modelos DEA en red (Network DEA – NDEA) en la evaluación educativa. En el presente trabajo, se ha propuesto una alternativa a la evaluación oficial realizada a cada tres años por la CAPES (agencia brasileña para la regulación de los programas de post-graduación) mediante un modelo DEA en red. El uso de NDEA se justifica ya que dependiendo del punto de vista algunas variables pueden ser consideradas como entradas o como salidas. El uso de NDEA evita la necesidad de decidir si una variable es una entrada o una salida de todo el proceso. Esto ocurre porque una variable puede ser tanto una salida para una etapa y una entrada para otro. Nuestro modelo relacional NDEA evalúa tanto la productividad como la calidad junto con la eficiencia global, a partir de datos bibliométricos

    Strong relationships between soil and vegetation in reference ecosystems of a riparian atlantic rainforest in the upper Doce River watershed, southeastern Brazil

    Get PDF
    Habitat loss and fragmentation have been impacting ecosystem services essential for human survival. The Brazilian Atlantic rainforest, a biodiversity hotspot, has suffered from historical deforestation and, more recently, from an environmental disaster caused by the Fundão dam collapse that released ore tailings drastically affecting a large territory in the Doce River watershed. This work aims to assess the relationships between soil properties and vegetation in a reference ecosystem to provide guidelines for restoration projects in areas affected by the dam collapse. We conducted phytosociological (vegetation characteristic) and soil quality studies in three distinct natural sites and studied different vegetation strata to better understand plant species composition in reference sites along the impacted Doce River and their potential role in community structuring and functioning. We recorded 140 species, 78 in the tree stratum, and 90 in the sapling stratum. Furthermore, our results highlight the influence of soil on floristic composition in the Atlantic rainforest. Smallscale edaphic variation influenced species composition in both sapling and tree strata. We also identified species of the same genus with strong association with the extremes of the edaphic gradient. Therefore, we highlight that studies in various regions along the Doce River watershed are of utmost importance to evaluate the association between species and soils. The particularities of the species are crucial to the effectiveness of restoration processes since this plant-soil correlation should not be extrapolated even within the same genus. This knowledge is of strategic relevance to provide scientificbased guidance for restoring these environments, aiming at the recovery of biodiversity and ecosystem services.Fil: Ramos, Letícia. Universidade Federal de Minas Gerais; BrasilFil: Negreiros, Daniel. Universidade Federal de Minas Gerais; BrasilFil: Ferreira, Bárbara S. Silva. Universidade Federal de Minas Gerais; BrasilFil: Figueiredo, João Carlos Gomes. Universidade Estadual de Montes Claros; BrasilFil: Paiva, Dario C.. Florida International University; Estados UnidosFil: Oki, Yumi. Universidade Federal de Minas Gerais; BrasilFil: De Souza Justino, Wénita. Universidade Federal de Minas Gerais; BrasilFil: Dos Santos, Rubens Manoel. Universidade Federal de Lavras; BrasilFil: Aguilar, Ramiro. Universidade Federal de Minas Gerais; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Nunes, Yule Roberta Ferreira. Universidade Estadual de Montes Claros; BrasilFil: Fernandes, G Wilson. Universidade Federal de Minas Gerais; Brasi

    Efeito da profundidade, estacionalidade e luminosidade no banco de sementes do solo de campo rupestre

    Get PDF
    The floristic composition of the rupestrian grasslands comprises a mosaic of species with different adaptations exhibiting high diversity and endemism. However, the plant species from rupestrian grasslands are dependent on site-specific conditions and their reproduction is almost always limited, making natural regeneration after disturbances difficult. The soil seed bank represents a potential factor for the regeneration of this environment. The objective was to evaluate the soil seed bank of different depths of a rupestrian grassland area, collected in two climatic seasons and submitted to different light conditions. The samples composed of litter and soil (0-5 cm) were collected in 13 plots of 100 m2, in a rupestrian grassland area in Serra do Cipó (Minas Gerais state), in dry and rainy seasons. The samples were subjected to full sun and shading conditions. In total, 185 seedlings of 31 species and nine botanical families emerged. The richest families were Cyperaceae, Poaceae and Asteraceae. There was variation in richness, abundance and floristic composition among the soil strata, but no variation was observed in relation to seasonality and light conditions. The soil samples presented higher values of the evaluated parameters in relation to those ones of litter, showing that the seed bank is more representative in the soil stratum. These results demonstrate that there is potential for rupestrian grassland regenerations through the seed bank, especially the soil stratum.A composição florística dos campos rupestres compreende um mosaico de espécies com adaptações distintas, exibindo alta diversidade e endemismo. Entretanto, as plantas dos campos rupestres possuem dependência às condições específicas do local e sua reprodução quase sempre é limitada, tornando difícil a regeneração natural após perturbações. O banco de sementes do solo representa um fator potencial para a regeneração deste ambiente. Objetivou-se avaliar o banco de sementes do solo de diferentes profundidades de uma área de campo rupestre, coletado em duas estações climáticas e submetido a duas condições de luminosidade. Foram coletadas amostras compostas de serapilheira e de solo (0-5 cm) em 13 parcelas de 100 m2, em uma área de campo rupestre na Serra do Cipó (Minas Gerais), nas estações seca e chuvosa. As amostras foram submetidas às condições de luminosidade pleno sol e sombreamento. No total, emergiram 185 plântulas pertencentes a 31 espécies e a nove famílias botânicas. As famílias com maior riqueza foram Cyperaceae, Poaceae e Asteraceae. Houve variação de riqueza, abundância e composição florística entre as profundidades do solo, mas não foi observada variação em relação à estacionalidade e às condições de luminosidade. As amostras de solo apresentaram valores superiores dos parâmetros avaliados em relação àquelas da serapilheira, mostrando que o banco de sementes é mais representativo no solo. Esses resultados demonstram que existe potencial de regeneração do campo rupestre por meio do banco de sementes do solo

    Integração de métodos multicritério na busca da sustentabilidade agrícola para a produção de tomates no município de São José de Ubá-RJ.

    Get PDF
    Este estudo discute alternativas para os sistemas produtivos da terra no plantio de tomates em São José de Ubá-RJ e as relações de trabalho passíveis de serem colocadas em pratica de forma a promover uma agricultura sustentavel na região, priorizando os aspectos economicos, ambientais e culturais do problema. A introdução da questão cultural aumenta a complexidade da questão, sendo necessário o uso de uma metodologia capaz de lidar com toda a subjetividade envolvida nesse processo de tomada de decisão. O estudo visa contribuir para a conquista de um processo sustentavel na região, estabelecendo um processo de tomada de decisão pautado nas opinioes do agricultor, respeitando principalmente as questões culturais do problema. As características do ambiente de tomada de decisão indicaram o uso de uma combinação de métodos de apoio a decisão multicritério - MACBETH e VIP Analysis - para a seleção da melhor alternativa capaz de possibilitar o alcance dos objetivos propostos

    Beware of scientific scams! Hints to avoid predatory publishing in biological journals

    Get PDF
    Our motivation for writing this editorial is to alert the academic community about the risks of predatory publishing in Biology. By piggy-backing on the open access (OA) movement and taking advantage of the “publish or perish” culture in a system that prioritises quantity over quality, predatory publishing has grown exponentially in recent years and spread across all areas of knowledge. Thousands of predatory journals and books have emerged and (provided a fee is paid) they publish scientific papers and chapters without submitting them to rigorous peer review. Now there are even predatory meetings, which promise to accept talks and publish complete works for a fee, also without reviewing them properly. These profit-making machines can damage both academia and society, putting at risk the quality of science and public trust in it, the well-being of the population, the conservation of biodiversity and the mitigation of climate change. We show the modus operandi behind invitations to contribute to predatory journals, books and meetings and suggest ways to separate the wheat from the chaff. Finally, we discuss the need to create regulatory agencies that perform a careful and systematic evaluation of the activities carried out by publishers

    SARS-CoV-2 introductions and early dynamics of the epidemic in Portugal

    Get PDF
    Genomic surveillance of SARS-CoV-2 in Portugal was rapidly implemented by the National Institute of Health in the early stages of the COVID-19 epidemic, in collaboration with more than 50 laboratories distributed nationwide. Methods By applying recent phylodynamic models that allow integration of individual-based travel history, we reconstructed and characterized the spatio-temporal dynamics of SARSCoV-2 introductions and early dissemination in Portugal. Results We detected at least 277 independent SARS-CoV-2 introductions, mostly from European countries (namely the United Kingdom, Spain, France, Italy, and Switzerland), which were consistent with the countries with the highest connectivity with Portugal. Although most introductions were estimated to have occurred during early March 2020, it is likely that SARS-CoV-2 was silently circulating in Portugal throughout February, before the first cases were confirmed. Conclusions Here we conclude that the earlier implementation of measures could have minimized the number of introductions and subsequent virus expansion in Portugal. This study lays the foundation for genomic epidemiology of SARS-CoV-2 in Portugal, and highlights the need for systematic and geographically-representative genomic surveillance.We gratefully acknowledge to Sara Hill and Nuno Faria (University of Oxford) and Joshua Quick and Nick Loman (University of Birmingham) for kindly providing us with the initial sets of Artic Network primers for NGS; Rafael Mamede (MRamirez team, IMM, Lisbon) for developing and sharing a bioinformatics script for sequence curation (https://github.com/rfm-targa/BioinfUtils); Philippe Lemey (KU Leuven) for providing guidance on the implementation of the phylodynamic models; Joshua L. Cherry (National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health) for providing guidance with the subsampling strategies; and all authors, originating and submitting laboratories who have contributed genome data on GISAID (https://www.gisaid.org/) on which part of this research is based. The opinions expressed in this article are those of the authors and do not reflect the view of the National Institutes of Health, the Department of Health and Human Services, or the United States government. This study is co-funded by Fundação para a Ciência e Tecnologia and Agência de Investigação Clínica e Inovação Biomédica (234_596874175) on behalf of the Research 4 COVID-19 call. Some infrastructural resources used in this study come from the GenomePT project (POCI-01-0145-FEDER-022184), supported by COMPETE 2020 - Operational Programme for Competitiveness and Internationalisation (POCI), Lisboa Portugal Regional Operational Programme (Lisboa2020), Algarve Portugal Regional Operational Programme (CRESC Algarve2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF), and by Fundação para a Ciência e a Tecnologia (FCT).info:eu-repo/semantics/publishedVersio

    DESENVOLVIMENTO SUSTENTÁVEL: UMA PERSPECTIVA INTEGRADA PARA GARANTIR SAÚDE PLANETÁRIA E A SOBERANIA ALIMENTAR

    Get PDF
    This article is about the interconnection between sustainable development with regard to ensuring planetary health and food sovereignty. In this context, planetary health is understood based on the paradigm shift proposed by the degradation of the environment during the decades preceding the current situation. In the meantime, it can be said that, in addition to excess production towards agribusiness, there is also the formation of the process of food insecurity and disrespect for the cultures of each society, through the violence proposed by the colonial idea of enrichment through economic capital. To this end, this summary studies the interconnection between sustainable development, planetary health and Food Sovereignty, in order to clarify the implications intrinsic to each concept and intertwined with each other. In this sense, secondary sources were chosen, through books, articles and texts that were related to the objective. Thus, as an exclusion criterion, all texts that did not express a strict relationship and were on the margins of the debate were discarded. On the other hand, for inclusion, we sought to collect texts that discuss the topic in a way corresponding to the discussion. Thus, food sovereignty is the right of people to define their own agricultural and food policies according to their needs and cultures, which recognizes the importance of autonomy in the production and access to healthy and sustainable food. Food sovereignty values ​​family farming, fair trade and the preservation of natural resources. In turn, planetary health presents itself as an essential approach to sustainable development and promoting human well-being. Thus, the search for planetary health, sustainable development and food sovereignty is a collective and continuous effort that requires concrete actions at a global, national and individual level. Therefore, the protection and preservation of the environment, the promotion of sustainable agricultural practices, especially within the family, and the guarantee of equitable access to healthy food are essential elements for a healthy and sustainable future for all, so that by recognizing interdependence Between health, the environment and healthy eating, we can talk about sustainable development.O presente artigo versa sobre a interconexão entre o desenvolvimento sustentável no que diz respeito à garantia da saúde planetária e da soberania alimentar. Nesse contexto, a saúde planetária é compreendida a partir da mudança de paradigma proposta pela degradação do meio ambiente durante os decênios que precedem o quadro atual. Nesse ínterim, pode-se dizer que, além do excesso de produção em direção ao agronegócio, tem-se, outrossim, a formação do processo de insegurança alimentar e do desrespeito às culturas de cada sociedade, por meio da violência proposta pela ideia colonial do enriquecimento através do capital econômico. Para tanto, este resumo estuda a interconexão entre desenvolvimento sustentável, saúde planetária e Soberania Alimentar, de forma a clarificar as implicações intrínsecas a cada conceito e entrelaçadas entre si. Nesse sentido, optou-se por fontes secundárias, através de livros, artigos e textos que tivessem relação com o objetivo. Assim, como critério de exclusão, foram descartados todos os textos que não expressassem relação estrita e estivessem à margem do debate. Por outro lado, para inclusão, procurou-se coletar os textos que discutem a temática de forma correspondente à discussão. Destarte, a soberania alimentar é o direito dos povos de definirem suas próprias políticas agrícolas e alimentares de acordo com suas necessidades e culturas que reconhecem a importância da autonomia na produção e no acesso a alimentos saudáveis e sustentáveis. A soberania alimentar valoriza a agricultura familiar, o comércio justo e a preservação dos recursos naturais. Por sua vez, a saúde planetária apresenta-se como abordagem imprescindível no desenvolvimento sustentável e na promoção ao bem-estar do ser humano. Assim, a busca pela saúde planetária, o desenvolvimento sustentável e a soberania alimentar trata-se de um esforço coletivo e contínuo que requer ações concretas em nível global, nacional e individual. Desse modo, a proteção e preservação do meio ambiente, a promoção de práticas agrícolas sustentáveis, mormente no âmbito familiar, a garantia de acesso equitativo a alimentos saudáveis são elementos essenciais para um futuro saudável e sustentável para todos, de forma que ao reconhecer a interdependência entre saúde, meio ambiente e a alimentação saudável, pode-se falar em desenvolvimento sustentável

    Health-related quality of life in patients with type 1 diabetes mellitus in the different geographical regions of Brazil : data from the Brazilian Type 1 Diabetes Study Group

    Get PDF
    Background: In type 1 diabetes mellitus (T1DM) management, enhancing health-related quality of life (HRQoL) is as important as good metabolic control and prevention of secondary complications. This study aims to evaluate possible regional differences in HRQoL, demographic features and clinical characteristics of patients with T1DM in Brazil, a country of continental proportions, as well as investigate which variables could influence the HRQoL of these individuals and contribute to these regional disparities. Methods: This was a retrospective, cross-sectional, multicenter study performed by the Brazilian Type 1 Diabetes Study Group (BrazDiab1SG), by analyzing EuroQol scores from 3005 participants with T1DM, in 28 public clinics, among all geographical regions of Brazil. Data on demography, economic status, chronic complications, glycemic control and lipid profile were also collected. Results: We have found that the North-Northeast region presents a higher index in the assessment of the overall health status (EQ-VAS) compared to the Southeast (74.6 ± 30 and 70.4 ± 19, respectively; p < 0.05). In addition, North- Northeast presented a lower frequency of self-reported anxiety-depression compared to all regions of the country (North-Northeast: 1.53 ± 0.6; Southeast: 1.65 ± 0.7; South: 1.72 ± 0.7; Midwest: 1.67 ± 0.7; p < 0.05). These findings could not be entirely explained by the HbA1c levels or the other variables examined. Conclusions: Our study points to the existence of additional factors not yet evaluated that could be determinant in the HRQoL of people with T1DM and contribute to these regional disparities
    corecore