Atitudes dos alunos face a si próprios e aos comportamentos de profissionalidade docente: Um estudo com alunos do 5.º e 7.º anos de escolaridade

Este artigo baseia-se num estudo realizado para a obtenção do grau de Mestre em Educação do primeiro autor, cuja dissertação foi apresentada na Universidade de Lisboa, com o mesmo título, sendo orientada pelo segundo autor.O presente estudo teve como objectivo geral analisar as atitudes dos alunos face a si-próprios e aos comportamentos de profissionalidade docente. Especificamente, foram colocadas as seguintes questões de estudo: Como se distribuem os alunos pelas atitudes face a si-próprios, em termos de discordância versus concordância com o item? Como se distribuem os alunos pelas avaliações que fazem dos comportamentos de profissionalidade docente atribuídos aos professores, em termos de discordância versus concordância com o item? Que relação existe entre as dimensões das atitudes dos alunos face a si-próprios e as avaliações que fazem dos comportamentos de profissionalidade docente? Que relação existe entre factores escolares específicos (rendimento escolar, percepção de apoio dos professores, aspirações escolares) e as atitudes dos alunos, quer face a si-próprios quer face aos comportamentos de profissionalidade docente? Quais as dimensões, quer do autoconceito quer da profissionalidade, que mais contribuem para a explicação do rendimento escolar? Como se diferenciam os alunos do 5º e do 7º ano, quer no autoconceito quer na avaliação da profissionalidade docente? Quais são as dimensões, quer do autoconceito quer da profissionalidade, que mais contribuem para a explicação do rendimento escolar dos alunos? A amostra foi constituída por 723 alunos, de ambos os sexos, do 5º e do 7º anos. Foram utilizados, como instrumentos, o Piers-Harris Children’s Self-concept Scale, a Escala de Representações dos Alunos acerca dos Comportamentos de Profissionalidade Docente e a Escala de Apoio Emocional dos Professores. A análise dos resultados permitiu observar que a maioria dos alunos apresentava atitudes positivas, quer face a si-próprios quer face aos comportamentos docentes, e encontrar relações entre as dimensões do autoconceito, as dimensões dos comportamentos de profissionalidade docente e as variáveis escolares em estudo. Os resultados aproximam-se de estudos prévios, foram interpretados numa perspectiva cognitivo-social e sugerem novas investigações

Ab initio theory of polarons: formalism and applications

We develop a theoretical and computational framework to study polarons in semiconductors and insulators from first principles. Our approach provides the formation energy, excitation energy, and wavefunction of both electron and hole polarons, and takes into account the coupling of the electron or hole to all phonons. An important feature of the present method is that it does not require supercell calculations, and relies exclusively on electron band structures, phonon dispersions, and electron-phonon matrix elements obtained from calculations in the crystal unit cell. Starting from the Kohn-Sham (KS) equations of density-functional theory, we formulate the polaron problem as a variational minimization, and we obtain a nonlinear eigenvalue problem in the basis of KS states and phonon eigenmodes. In our formalism the electronic component of the polaron is expressed as a coherent superposition of KS states, in close analogy with the solution of the Bethe-Salpeter equation for the calculation of excitons. We demonstrate the power of the methodology by studying polarons in LiF and Li2O2. We show that our method describes both small and large polarons, and seamlessly captures Frohlich-type polar electron-phonon coupling and non-Frohlich coupling to acoustic and optical phonons. To analyze in quantitative terms the electron-phonon coupling mechanisms leading to the formation of polarons, we introduce spectral decompositions similar to the Eliashberg spectral function. We validate our theory using both analytical results and direct calculations on large supercells. This study constitutes a first step toward complete ab initio many-body calculations of polarons in real materials.Comment: 26 pages, 8 figure

O uso da espectrocopia Raman na análise de pigmentos comerciais submetidos a processo de envelhecimento artificial

Orientador: Prof. Dr. Evaldo RibeiroCoorientador: Prof. Dr. Ismael HeislerDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Física. Defesa : Curitiba, 30/07/2021Inclui referências: p. 70-73Resumo: Na Ciência Forense a análise de obras de arte tem uma grande importância, como na verificação da datação de uma obra, métodos que auxiliem em sua preservação e restauração, e também na análise de autenticidade. O ideal para esse tipo de análise é a utilização de uma técnica que não prejudique a integridade da obra, por esse motivo a Espectroscopia Raman vem ganhando cada vez mais espaço nos laboratórios forenses; por se tratar de uma técnica não destrutiva, ela mantém a integridade total da obra e também não necessita de manipulação do material a ser analisado. Após a grande apreensão de obras de arte pela operação Lava Jato, viu-se a necessidade de utilizar um método de autenticação objetivo, que não permite contestação futura. Além disso, verificou-se a ausência de metodologias que pudessem auxiliar durante a análise dos pigmentos, não verificando apenas a autenticidade deles, mas também que pudessem trazer informações qualitativas a respeito destes pigmentos, como por exemplo a possível data em que estes pigmentos foram empregados no quadro.O presente trabalho tem como objetivo avaliar a possibilidade da utilização da técnica de Espalhamento Micro Raman na detecção de envelhecimento artificial de pinturas, o que é um processo de fraude utilizado por falsificadores para secagem acelerada da tinta, empregando as mesmas técnicas utilizadas por falsificadores de obras de arte.Abstract: In Forensic Science, the analysis of artworks is of great importance, as in verifying the dating of a piece, methods that help in its preservation and restoration, and also the analysis of authenticity. The ideal for this type of analysis is to use a technique that does not harm the artwork's integrity, for this reason Raman Spectroscopy has been gaining more and more space in forensic laboratories; since it is a non-destructive technique, it maintains the total integrity of the art piece and also does not require manipulation of the material to be analyzed. After the large artwork apprehension by the Lava Jato operation, there was a need to use an objective authentication method which does not allow future contestation. In addition, there was a lack of methodologies that could help during the analysis of the pigments, not only verifying their authenticity, but also that they could bring qualitative information about a given pigment, such as the possible date on which this pigment was used in the painting. The present work aims to evaluate the possibility of using the Micro Raman Scattering technique in the detection of artificial aging of paints, which is a fraud process used by forgers for accelerated drying of paint, employing the same techniques used by forgers of artwork

Adipose Tissue Distribution and Survival Among Women with Nonmetastatic Breast Cancer.

ObjectivePrevious studies of breast cancer survival have not considered specific depots of adipose tissue such as subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT).MethodsThis study assessed these relationships among 3,235 women with stage II and III breast cancer diagnosed between 2005 and 2013 at Kaiser Permanente Northern California and between 2000 and 2012 at Dana Farber Cancer Institute. SAT and VAT areas (in centimeters squared) were calculated from routine computed tomography scans within 6 (median: 1.2) months of diagnosis, covariates were collected from electronic health records, and vital status was assessed by death records. Hazard ratios (HRs) and 95% CIs were estimated using Cox regression.ResultsSAT and VAT ranged from 19.0 to 891 cm2 and from 0.484 to 454 cm2 , respectively. SAT was related to increased risk of death (127-cm2 increase; HR [95% CI]: 1.13 [1.02-1.26]), but no relationship was found with VAT (78.18-cm2 increase; HR [95% CI]: 1.02 [0.91-1.14]). An association with VAT was noted among women with stage II cancer (stage II: HR: 1.17 [95% CI: 0.99-1.39]; stage III: HR: 0.90 [95% CI: 0.76-1.07]; P interaction < 0.01). Joint increases in SAT and VAT were associated with mortality above either alone (simultaneous 1-SD increase: HR 1.19 [95% CI: 1.05-1.34]).ConclusionsSAT may be an underappreciated risk factor for breast cancer-related death

O blog no Pibid letras Inglês contribuindo para o desenvolvimento de competências desejáveis ao futuro professor de língua inglesa

Anais do II Seminário Seminário Estadual PIBID do Paraná: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes — Foz do Iguaçu: Unioeste; Unila, 2014Este trabalho tem como propósito discutir as possibilidades do uso pedagógico do blog como ferramenta de apoio às aulas de Língua Inglesa nas escolas parceiras do projeto PIBID de Letras Inglês, e suas contribuições no desenvolvimento e aprimoramento de competências desejáveis ao licenciando de Letra

Molecular and morphological analyses reveal pseudocryptic diversity in Micromelo undatus (Brugui ere, 1792) (Gastropoda: Heterobranchia: Aplustridae)

The genus Micromelo (family Aplustridae) occurs in almost all tropical and subtropical waters across the globe, with the exception of the Eastern Pacific. Most authors consider Micromelo undatus (Bruguière, 1792) as the only valid species in this genus. This study examines populations of specimens identified as M. undatus across its geographic range, using morphological and genetic data from two mitochondrial genes (16S and CO1) and one nuclear gene (Histone H3). The results reveal that M. undatus is a complex of four species with consistent genetic and anatomical differences. A literature review and evaluation of type material indicates that available names exist for three of the four species. Micromelo guamensis, M. undatus and M. scriptus are resurrected for species found in the Western Pacific, the Atlantic Ocean, and widespread in the Indo-Pacific, respectively. A new name is introduced for another species found in the Western Pacific, namely Micromelo barbarae sp. nov. and a neotype is designated for the type species of the genus M. undatus.publishedVersio

Investigating ozone episodes in Portugal: a wavelet-based approach

During the summer season, ozone concentrations regularly exceed the legislation limits in the North of Portugal, namely at Douro Norte monitoring station. The origin of such ozone episodes has been widely reported in several studies although uncertainties regarding its origin still remain. This work intends to investigate how the ozone concentrations measured at the Douro Norte nearest stations, located at west and east directions, are related to those measured at Douro Norte by means of coherence and phase transformations methods. The episodes were selected according to the magnitude of the hourly ozone peaks and the occurrence of exceedances of the threshold value at least in two sites. The results point out that 60 % of the selected episodes highlight significant dependence between Douro Norte station and the other two monitoring sites, with different phase signal and a delay range from 2 to 4 h.The authors wish to thank the financial support of the Comiss˜ao de Coordenac¸ ˜ao e Desenvolvimento Regional do Norte (CCDR-N). Thanks are extended to the Portuguese Foundation for Science and Technology for the financial support through the Project MAPLIA (PTDC/AAG-MAA/4077/2012), and the PhD grant of Carla Gama (SFRH/BD/87468/2012) and the Pos-Doc grant of S. Gouveia (SFRH/-BPD/87037/2012), and CIDMA/UA project PEst- OE/MAT/UI4106/2014 (Centro de Investigac¸ ˜ao e Desenvolvimento em Matem´atica e Aplicac¸ ˜oes, CIDMA/UA, Aveiro, www.cidma.mat. ua.pt), and IEETA/UA project PEst-OE/EEI/-UI0127/2014 (Instituto de Engenharia Electr´onica e Telem´atica de Aveiro, IEETA/UA, Aveiro, www.ieeta.pt).info:eu-repo/semantics/publishedVersio

Uso de Ricinus communis como bioindicador de poluentes atmosféricos em ambiente urbano

46

Circular economy in companies from the Northwest of the Iberian Peninsula: survey under the Circular Labs POCTEP Project

Circular Economy (CE) is a strategic concept based on a deep change in contemporary societies, moving from a linear economy to a circular model. The CircularLabs POCTEP* project aims at promoting the integration of the CE in business models and includes the participation of 11 partners from the three Regions of: the North of Portugal, Galicia and Castilla y León, both in Spain. This project Among its initial actions, this project launched an online survey for companies located in this Iberian Northwest Regions. A total of 294 companies answered this survey. On this sample, SMEs from services and industry were the most represented groups. The survey focused on multiple aspects, including the recognition of CE concepts, the integration of CE strategies, reasons for CE implementation, main obstacles and barriers, among others. Results show a dispersion in the interpretation of the CE concept, as it is mostly recognised as part of a strategical vision or policy in these companies. Moreover, CE is mostly considered for its environmental benefits. The most relevant difficulties found in EC implementation related to the lack of information and advice and insufficient financial support. The fact that only a fraction of the companies had implemented environmental management systems, may be seen as a reason for the lack of internal structure for CE technical support. This research will outline some of the necessary steps towards CE implementation in these North-western Iberian Regions.This study was part of the Trans-National Project CircularLabs. The authors would like to thank the Spain-Portugal Transnational Program (POCTEP), with the Financial Support from the European Union under Program FEDER (European Regional Development Fund). This Program is not responsible for the opinions expressed by the authors. Some of the authors are grateful to the Foundation for Science and Technology (FCT, Portugal) and FEDER under Programme PT2020 for financial support to CIMO (UIDB/00690/2020).info:eu-repo/semantics/publishedVersio