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Data strikes against data coloniality : hacking labour law.
No full textFrom a decolonial perspective, what is the relationship between the limits of the legality of strikes and boycotts in digital labour? Starting from Faustino and Lippold’s framework, we will consolidate the idea that data coloniality is part of the dynamics of capitalist/racist accumulation, through the expropriation and exploitation of digital labour, especially in the Global South. In this dynamic, however, new forms of workers’ resistance arise, finding gaps for reappropriating the immaterial labour that they produced. Among these collective resistances, we chose to investigate data strikes, analysing the case of the “breque dos apps” in Brazil, often related to boycott actions of digital platforms, that integrate the perspectives of hacktivism, considering McKenzie's thought. Therefore, legal analysis is required considering these new conflicts. How can labour law, from a decolonial perspective, contribute to the legality of forms of resistance compatible with the current capitalist dynamics? Considering the coloniality of knowledge that involves the right to strike, it may be more advantageous for digital workers to think about other legal instruments to protect their collective struggle, using data protection laws, in defence of workers' intellectual property. We need to hack the networks, but also find ways of hacking Law itself
Marketing and communication strategies in the face of media influence during image crisis in tourist destinations : the case of Ouro Preto and the dam breaks.
No full textThis study addresses the marketing and communication strategies adopted by the public authorities of Ouro Preto in response to adverse news resulting from mining dam collapses in the region, and how these strategies influence the formation of the tourist destination's imagery. Ouro Preto is a historically and culturally significant tourist destination of international relevance, with tourism playing a crucial role in the local economy. Events such as the mining dam collapses in the region prompt reflections on crisis management and the media's influence on shaping the destination's image. The objectives include understanding the marketing and communication strategies employed by the public authorities of Ouro Preto in the face of adverse news, as well as the media's influence on the formation of the tourist destination's imagery. The study is qualitative in nature and is based on a literature review, analysis of interviews with representatives from both public authorities and the private sector, as well as an analysis of the main headlines disseminated by the media. The results analyze the marketing strategies adopted by the Ouro Preto municipal government and the main news headlines associated with the city's name, providing insights into how destinations face and respond to crisis situations, while also contributing to a broader understanding of decision-making processes and visitor perception
Análise comparativa da qualidade das informações contábeis entre empresas francesas, brasileiras e latino-americanas.
No full textPurpose: This work aimed to compare the Accounting Information Quality (AIQ) of publicly traded companies in markets with different levels of economic development, represented by France, Brazil and other Latin American countries (these together). Methodology: The methodological approach was quantitative, using descriptive and exploratory statistics, and regression with unbalanced panel data. The data used encompassed the following periods: between 1987 and 2017, for the French market; between 1995 and 2017, for the Brazilian market; and between 1989 and 2015, for the Latin American market. Results: The results pointed to structural differences in AIQ in financial statements between the markets analyzed, indicating that the more developed market has better AIQ. Contributions of the Study: As a practical contribution, this research can support investor decisions, while the academic knowledge generated reveals that markets in different economic contexts have different levels of AIQ.Objetivo: Comparar a Qualidade da Informação Contábil (QIC) de empresas de capital aberto, em mercados com níveis distintos de desenvolvimento econômico, representados pela França, Brasil e demais países latino-americanos (estes em conjunto). Metodologia: A abordagem metodológica foi quantitativa, com uso de estatísticas descritivas e exploratórias, e regressão com dados em painéis desbalanceados. Os dados utilizados envolveram os seguintes períodos: mercado francês, entre 1987 e 2017; mercado brasileiro, entre 1995 e 2017; e mercado latino-americano, entre 1989 e 2015. Resultados: Os resultados apontaram diferenças estruturais da QIC em demonstrações financeiras entre os mercados analisados, indicando que o mais desenvolvido apresenta melhor QIC. Contribuições do Estudo: Como contribuição prática, esta pesquisa pode subsidiar decisões dos investidores, ao mesmo tempo que o conhecimento acadêmico gerado revela que mercados em contextos econômicos diversos apresentam diferentes níveis de QIC
Vasallaje académico y alteridad a partir de una experiencia universitaria.
No full textEste trabalho é resultado de uma reflexão realizada para o Memorial Acadêmico de Professor Titular da Carreira de Magistério Superior. Seu objeto é constituído por experiências vivenciadas e práticas existentes no interior de universidades brasileiras. Seu objetivo principal é desenvolver o conceito de “vassalagem acadêmica”, a fim de demonstrar que se trata de uma relação política e existencial de sujeição que abafa o dissenso, nega a alteridade, e impede o desenvolvimento do espírito crítico e da emancipação política. O pressuposto é de que nos territórios dos feudos acadêmicos o ostracismo funciona como uma maneira de afastar, segregar e excluir sujeitos insubmissos que se insurgem contra a condição de vassalos.This work is the product of a reflection made for an Academic Memorial of the Full Professor of the Higher Education Career. It is based on experiences and practices lived by Brazilian universities. The main purpose is to develop and explore the concept of "academic vassalage" with the intention of demonstrating that it is a political and existential relationship of subjection that represses dissent, denies otherness, prevents the development of critical spirit and political emancipation. The hypothesis is that, in the territories of academic fiefdoms, ostracism runs as a alienating, segregating and excluding way for unsubmissive individuals who rebel against the condition of vassal
Breve panorama de las concesiones en los Parques Estatales de Itacolomi e Ibitipoca, Minas Gerais.
No full textThis article investigates the public use concession processes in the Itacolomi and Ibitipoca State Parks, located in Minas Gerais, Brazil. The research examines the challenges and opportunities involved in the concession of these protected areas, considering the interaction between public managers, the private sector, and local communities. Through a historical and critical analysis, the study explores how the economic exploitation of these areas can be balanced with environmental conservation, while also highlighting the risks of commodifying nature and excluding traditional populations. The paper discusses the importance of participatory management that involves all social actors, ensuring that concessions contribute both to biodiversity preservation and to the sustainable socioeconomic development of the regions. Based on the collected data, the article proposes recommendations to improve concession processes in Conservation Units, promoting a management model that respects the rights of local communities and ensures long-term sustainability. It concludes that an ethical and inclusive approach is essential for the success of the concessions and for mutual benefits to both the environment and society.Este artigo investiga os processos de concessão de uso público nos Parques Estaduais do Itacolomi e Ibitipoca, localizados em Minas Gerais, Brasil. A pesquisa examina os desafios e as oportunidades envolvidos na concessão dessas áreas protegidas, considerando a interação entre os gestores públicos, a iniciativa privada e as comunidades locais. Por meio de uma análise histórica e crítica, o estudo aborda como a exploração econômica dessas áreas pode ser equilibrada com a conservação ambiental, ao mesmo tempo em que destaca os riscos de mercantilização da natureza e a exclusão de populações tradicionais. O trabalho discute a importância de uma gestão participativa que envolva todos os atores sociais, garantindo que as concessões contribuam tanto para a preservação da biodiversidade, quanto para o desenvolvimento socioeconômico sustentável das regiões. Com base nos dados coletados, o artigo propõe recomendações para aperfeiçoar os processos de concessão em Unidades de Conservação, de modo a promover um modelo de gestão que respeite os direitos das comunidades locais e assegure a sustentabilidade a longo prazo. Conclui- se que uma abordagem ética e inclusiva é necessária para o sucesso das concessões e para os benefícios mútuos entre meio ambiente e sociedade
Interfaces do comportamento sedentário e do consumo alimentar infantil.
No full textPrograma de Pós-Graduação em Saúde e Nutrição. Escola de Nutrição, Universidade Federal de Ouro Preto.Introdução: A restrição social imposta pela pandemia da covid-19 foi essencial no combate e diminuição da transmissibilidade do vírus, mas influenciou os hábitos de vida da população. No caso das crianças, em função da suspensão das aulas presenciais alguns hábitos como o comportamento sedentário e o consumo alimentar podem ter se modificado. Objetivo: Avaliar o consumo alimentar e sua associação com o comportamento sedentário em crianças durante a pandemia da covid-19. Métodos: Estudo transversal com crianças de cinco a dez anos residentes em Ouro Preto/Minas Gerais cuja coleta de dados ocorreu de abril a outubro de 2021. Foi avaliado o consumo alimentar como variável desfecho, por meio de um escore criado a partir das respostas dos participantes ao Questionário Alimentar do Dia Anterior (QUADA-3), que conta com 21 figuras de alimentos e é autopreenchível. Posteriormente, os alimentos foram agrupados em 12 grupos alimentares e classificados conforme a extensão e propósito de processamento alimentar, especificamente em dois grupos (in natura e ultraprocessados). O escore levou em conta a frequência diária de consumo e a extensão e propósito do processamento dos alimentos e em seguida, o mesmo foi categorizado como consumo adequado (>p75 ou p75), characterized by high consumption of fresh foods and low ultra-processed or inadequate consumption (<p75), characterized by high consumption of ultra- processed products and low consumption of fresh foods. The explanatory variable was sedentary behavior, classified as <3 hours/day and ≥3 hours according to recommendations from the Brazilian Society of Pediatrics. In relation to covariates, the following were considered: sociodemographic characteristics, child's health history, family history of diseases and anthropometric characteristics. Univariate and multivariate logistic regression were performed. Results: 517 children were evaluated, 51.3% male, 60.5% aged between eight and ten years, 85.1% public school students and 46.8% declared their skin color as black. Regarding food consumption, 76.4% had inadequate food consumption (≥5 points on the score). In the multivariate analysis, adjusted for sex, type of school, level of education of the head of the family, family history of obesity, income and BMI, it was observed that children with a SB ≥3h/day were more likely to have a diet with greater representation of ultra- processed foods and less of natural/minimally processed foods, i.e., a dietary score≥5 points (OR: 2.18; 95%CI 1.31 - 3.65). Conclusion: During the pandemic, children remained sedentary for a long time and consumed mainly ultra-processed foods, which is worrying for children's health, with sedentary behavior increasing the chance of inadequate nutrition. This set of factors can lead to problems in the quality of life and well-being of children, but also in adult life with the development of chronic diseases. Therefore, taking care of children's health must be a priority, through joint efforts between families, schools and health authorities, even when faced with challenges such as those that occurred during the pandemic
Efeitos dos polimorfismos do gene ADIPOQ nas concentrações de adiponectina e sua isoforma de alto peso molecular em crianças e adolescentes com obesidade e hipertensão.
No full textPrograma de Pós-Graduação em Ciências Farmacêuticas. Escola de Farmácia, Universidade Federal de Ouro Preto.Este estudo avaliou se os polimorfismos do gene ADIPOQ influenciam as concentrações plasmáticas de APN e sua isoforma HMW, além de investigar sua associação com obesidade e hipertensão em crianças e adolescentes. Foi realizado um estudo caso-controle com 297 crianças e adolescentes, distribuídos em três grupos: controles saudáveis (CT - n=142), com obesidade (OBN - n=104) com obesidade e hipertensão (OBH - n=51). O DNA foi extraído de amostras de sangue periférico e os polimorfismos do gene ADIPOQ (rs1501299 e rs266729) foram genotipados utilizando o ensaio TaqMan com qPCR. As concentrações de APN e HMW foram dosadas por ELISA. A análise de variância, utilizando o teste de Kruskall- Wallis, e a análise de regressão linear foram realizadas para avaliar os efeitos dos genótipos e haplótipos nas concentrações de APN e HMW, ajustando para Índice de Massa Corporal, Pressão Arterial Sistólica e níveis de colesterol LDL. A análise de qui-quadrado foi utilizada para estimar a associação entre os genótipos e o desenvolvimento daobesidade e hipertensão. Na análise de regressão linear múltipla, descobriu-se que a presença do alelo alternativo CG (rs266729) em crianças e adolescentes está ligada à diminuição das concentrações de HMW (P= 0,034) e da razão HMW/APN (P= 0,046). A presença do alelo alternativo GT (rs1501299) está associada a um aumento nas concentrações de HMW (P= 0,001) e HMW/APN (P= 0,027). Na análise de haplótipos, o haplótipo GG está associado a uma redução nas concentrações de APN (P= 0,035) e HMW (P= 0,007). Na análise de qui-quadrado foi observado que o genótipo CG do rs266729 no modelo aditivo (OR=2,548; p=0,003) foi associado a um maior risco de desenvolver hipertensão. Portanto, polimorfismos no gene ADIPOQ afetam as concentrações de HMW e estão associados à hipertensão. O entendimento da base genética da obesidade e da hipertensão na população pediátrica pode contribuir na identificação de grupos de risco e, consequentemente, no desenvolvimento de estratégias para prevenção e tratamento.This study evaluated whether polymorphisms in the ADIPOQ gene influence plasma concentrations of APN and its HMW isoform, as well as investigating their association with obesity and hypertension in children and adolescents. A case-control study was conducted with 297 children and adolescents, distributed into three groups: healthy controls (CT - n=142), obese (OBN - n=104), and obese with hypertension (OBH - n=51). DNA was extracted from peripheral blood samples, and polymorphisms in the ADIPOQ gene (rs1501299 and rs266729) were genotyped using the TaqMan assay with qPCR. APN and HMW concentrations were measured by ELISA. Variance analysis using the Kruskall-Wallis test and linear regression analysis were performed to evaluate the effects of genotypes and haplotypes on APN and HMW concentrations, adjusting for Body Mass Index, Systolic Blood Pressure, and LDL cholesterol levels. The chi-square analysis was used to estimate the association between genotypes and the development of obesity and hypertension. In multiple linear regression analysis, it was found that the presence of the alternative CG allele (rs266729) in children and adolescents is linked to decreased concentrations of HMW (P= 0.034) and the HMW/APN ratio (P= 0.046). The presence of the alternative GT allele (rs1501299) is associated with an increase in HMW concentrations (P= 0.001) and HMW/APN (P= 0.027). In haplotype analysis, the GG haplotype is associated with a reduction in APN (P= 0.035) and HMW concentrations (P= 0.007). Chi-square analysis revealed that the CG genotype of rs266729 in the additive model (OR=2.548; p=0.003) was associated with a higher risk of developing hypertension. Therefore, polymorphisms in the ADIPOQ gene affect HMW concentrations and are associated with hypertension. Understanding the genetic basis of obesity and hypertension in the pediatric population may contribute to identifying at-risk groups and, consequently, to developing prevention and treatment strategies
Towards robust ferrous scrap material classification with deep learning and conformal prediction.
No full textThe classification of ferrous scrap materials is a well-explored problem in the literature, recognized for its significance in the steel production industry. While deep learning models are effective for this task, their deployment in industrial settings requires addressing model uncertainties and ensuring proper calibration. This study proposes adapting split conformal prediction to quantify uncertainties and facilitate model calibration. The results indicate that the Hierarchical Vision Transformer using Shifted Windows (Swin) models, particularly Swin V2, serves as the most reliable backbone for this task. Although the performance of Swin models is comparable to other evaluated models, Swin V2 demonstrates superior confidence, achieving 95.51% accuracy and the lowest conformal prediction threshold. The method is rigorously evaluated on a real-world dataset comprising 8,147 images across nine classes of ferrous scrap widely used in the Brazilian steel industry. Explainability methods corroborate the results of conformal prediction, enhancing transparency and trust in model predictions, and thereby facilitating industrial adoption. This approach bridges the gap between advanced deep learning and practical application in ferrous scrap classification, underscoring the importance of model calibration in industrial deployment
