A infância representada no livro escolar: tipos de textos e estereótipos sociais

Esta investigação inscreve-se dominantemente no âmbito dos estudos da criança e ancora a sua área específica nas questões linguísticas, assumindo os pressupostos teóricos e metodológicos da análise do discurso (de tradição francófona), considerando também contributos de áreas conexas. Analisa textos de manuais/livros escolares usados no sistema de ensino português, pretendendo tornar visíveis as imagens que estes constroem das crianças e da infância, bem como os recursos linguísticos mais relevantes associados a tal construção. Procura desvendar a representatividade das tipologias textuais nos manuais e de que forma estas contribuem para a construção das referidas imagens. Conclui que as crianças dos textos são seres sem voz e sem poder, consumidoras, mas não coprodutoras de cultura, com os textos inculcando valores conformadores da manutenção da ordem social estabelecida, sendo a forma como as tipologias textuais estão organizadas contribuidora para se alcançar esse propósito.This research forms primarily part of the child studies and is based on its specific field of linguistic issues, assuming the theoretical and methodological assumptions of the speech analysis (of French-speaking tradition), having also regard the inputs of related fields. It analyses texts from handbooks/textbooks used on the Portuguese educational system, intending to reveal pictures that these books construct about children and childhood, as well as the most relevant linguistic resources associated with such construction. This paper aims at unravelling the representation of the text typologies in the handbooks and how these can contribute for building of such pictures. From this, one can conclude that children from the texts are voiceless and have no power, they are consumers but not co-producers of culture, with these texts instilling conservative values for maintaining the established social order, but also that the way texts typologies are organized to contribute for reaching that propose.Esta investigación se ensere en el ámbito de los estudios del niño y más precisamente en la área de las cuestiones lingüísticas, asumiendo los presupuestos teóricos e metodológicos de la análisis del discurso (de tradición francófona), considerando también aportes de las áreas conexas. Analiza textos de manuales/libros escolares usados en el sistema de enseñanza portugués, pretendiendo tornar visibles las imágenes que este construyen de los niños y de la infancia, bien como los recursos lingüísticos más relevantes asociados a esa construcción. Busca desvendar la representatividad de las tipologías textuales en los manuales y de qué forma contribuyen para la construcción de las referidas imágenes. Concluye que los niños de los textos son seres sin voz y sin poder, consumidores, pero no coproductores de cultura y que los textos inculcan valores conformadores de manutención del orden social establecido, mas también que la forma como las tipologías textuales están organizadas contribuye para alcanzar ese propósito.CIEC - Centro de Investigação em Estudos da Criança, IE, UMinho (UI 317 da FCT), Portugal. Fundos Nacionais através da FCT (Fundação para a Ciência e a Tecnologia) e cofinanciado pelo Fundo Europeu de Desenvolvimento Regional (FEDER) através do COMPETE 2020 – Programa Operacional Competitividade e Internacionalização (POCI) no âmbito do CIEC (Centro de Investigação em Estudos da Criança, da Universidade do Minho) com a referência POCI-01-0145-FEDER-007562info:eu-repo/semantics/publishedVersio

Circular Security Is Complete for KDM Security

Circular security is the most elementary form of key-dependent message (KDM) security, which allows us to securely encrypt only a copy of secret key bits. In this work, we show that circular security is complete for KDM security in the sense that an encryption scheme satisfying this security notion can be transformed into one satisfying KDM security with respect to all functions computable by a-priori bounded-size circuits (bounded-KDM security). This result holds in the presence of any number of keys and in any of secret-key/public-key and CPA/CCA settings. Such a completeness result was previously shown by Applebaum (EUROCRYPT 2011) for KDM security with respect to projection functions (projection-KDM security) that allows us to securely encrypt both a copy and a negation of secret key bits. Besides amplifying the strength of KDM security, our transformation in fact can start from an encryption scheme satisfying circular security against CPA attacks and results in one satisfying bounded-KDM security against CCA attacks. This result improves the recent result by Kitagawa and Matsuda (TCC 2019) showing a CPA-to-CCA transformation for KDM secure public-key encryption schemes

Prevalence and risk factors for internet gaming disorder

Objectives: To estimate the prevalence of internet gaming disorder (IGD) and associated risk factors in a sample of secondary and postsecondary students from a public federal institution of higher education (Instituto Federal de Educação, Ciência e Tecnologia) in Southern Brazil. Methods: The study included a sociodemographic questionnaire, the Beck Depression Inventory (BDI), Self-Report Questionnaire (SRQ-20), Pittsburgh Sleep Quality Index (PSQI-BR), the Mini-Social Phobia Inventory (Mini-SPIN), and the Game Addiction Scale (GAS). Finally, IGD was measured with the Brazilian version of the Internet Gaming Disorder Scale-Short-Form (IGDS9-SF), which has been psychometrically validated in this population. Results: Overall, 38.2% (n=212) of the sample exhibited IGD symptoms, with 18.2% (n=101) being classed as at-risk gamers. Regression analysis found IGD to be associated with male gender, severe depressive symptoms, poor sleep quality, increased time spent gaming, and total free time spent gaming (p < 0.001). Conclusions: The prevalence of IGD in this sample was relatively high, and associated risk factors found were similar to those previously reported in the literature. Further studies investigating the epidemiology of IGD in Brazilian samples are warranted to better understand treatment needs and inform preventive measures in this population

Spatial distribution patterns of microbiome and free-living benthic nematodes in response to sediment ecological conditions in Sado estuary, Portugal (SW)

Sediment microbiome has an essential role in regulating ecosystem functions, not only regulating primary productivity and nutrient cycling but also shaping trophic interactions with higher trophic levels [1]. While the importance of microbiome in terrestrial soil systems is being highly recognized, its role in marine aquatic environments remains much less studied [2]. Microbiome can be highly affected by bottom up (abiotic factors) and top down (predation by meiofauna) effects [3]. Understanding the interaction effect between abiotic and biotic factors on microbiome communities will be an essential step for future predictions of ecosystem stability. To address this knowledge gap we studied spatial distribution patterns of microbiome communities and nematode assemblages in highly heterogenous Sado Estuary, SW Portugal. The samples were taken from three contrasting sites with varying sediment characteristics and human impact degrees. From each site, three replicate samples for sediment characterization (total organic matter, granulometry, total C and N, chlorophyll a and phaeopigments, contaminants: heavy metals and metalloids, organochlorine pesticides, PAH and PCBs), microbiome (sensu lato) and nematode community were taken. Total DNA from sediment was extracted using DNeasy Power Soil kit® (MOBIO, Qiagen) and processed for Illumina MiSeq platform sequencing targeting the V3 and V4 region of 16S rRNA gene. Sediment characterization indicated heterogeneity between sites with distinct levels of contamination, which resulted in contrasting microbial communities. All sites showed a high α-biodiversity with predominance of Proteobacteria phylum, particularly Woeseiaceae, Desulfobacteraceae and Desulfobulbaceae families. Beside this heterogeneity in microbiome community, β-diversity of microbiome communities was demonstrated to be very high, greatly discriminating among all three sites. Instead, nematode assemblages did not yield clear distributional patterns suggesting that their response is rather driven by the within site specific factors, acting at the smaller spatial scales. Studying the relations between sediment ecological conditions and microbiome and meiobenthic communities greatly advance our understanding on benthic ecosystem functioning