Erratum: the sedigism survey: molecular clouds in the inner galaxy - supplementary material

This is a correction to: Monthly Notices of the Royal Astronomical Society, Volume 500, Issue 3, January 2021, Pages 3027–3049, https://doi.org/10.1093/mnras/staa248

Are turbulent spheres suitable initial conditions for star-forming clouds?

To date, most numerical simulations of molecular clouds, and star formation within them, assume a uniform density sphere or box with an imposed turbulent velocity field. In this work, we select molecular clouds from galactic scale simulations as initial conditions, increase their resolution, and re-simulate them using the smoothed particle hydrodynamics code GADGET2. Our approach provides clouds with morphologies, internal structures and kinematics that constitute more consistent and realistic initial conditions for simulations of star formation. We perform comparisons between molecular clouds derived from a galactic simulation, and spheres of turbulent gas of similar dimensions, mass and velocity dispersion. We focus on properties of the clouds such as their density, velocity structure and star formation rate. We find that the inherited velocity structure of the galactic clouds has a significant impact on the star formation rate and evolution of the cloud. Our results indicate that, although we can follow the time evolution of star formation in any simulated cloud, capturing the entire history is difficult as we ignore any star formation that might have occurred before initialization. Overall, the turbulent spheres do not match the complexity of the galactic clouds

Are turbulent spheres suitable initial conditions for star-forming clouds?

To date, most numerical simulations of molecular clouds, and star formation within them, assume a uniform density sphere or box with an imposed turbulent velocity field. In this work, we select molecular clouds from galactic scale simulations as initial conditions, increase their resolution, and re-simulate them using the SPH code Gadget2. Our approach provides clouds with morphologies, internal structures, and kinematics that constitute more consistent and realistic initial conditions for simulations of star formation. We perform comparisons between molecular clouds derived from a galactic simulation, and spheres of turbulent gas of similar dimensions, mass and velocity dispersion. We focus on properties of the clouds such as their density, velocity structure and star formation rate. We find that the inherited velocity structure of the galactic clouds has a significant impact on the star formation rate and evolution of the cloud. Our results indicate that, although we can follow the time evolution of star formation in any simulated cloud, capturing the entire history is difficult as we ignore any star formation that might have occurred before initialisation. Overall, the turbulent spheres do not match the complexity of the galactic clouds.Comment: 5 pages, 5 figures, 1 table. Accepted to MNRAS Letter

Milky Way: structure via live potentials

We use the AREPO numerical code to model the structure of a Milky Way like galaxy (MW) via a suite of simulations composed of a stellar disc and bulge, a dark matter halo, and a gaseous disc under isothermal conditions. For each model, we produce longitude velocity (l-v) maps of the gas surface densities to extract the skeletons of the main features (arms, bar), and the contours defining the terminal velocities of the gas. We compare these with observations via a number of diagnostic tools, and select the model that best reproduces the main observed features of the Milky Way

POR QUE HAVERIA NO BRASIL UM SISTEMA DE REVISÃO JUDICIAL SUPERFORTE? A ANÁLISE DO CONTROLE DE CONSTITUCIONALIDADE E O PROTAGONISMO DO PODER JUDICIÁRIO

O artigo analisa os aspectos relativos ao modelo brasileiro de controle de constitucionalidade, sendo debatido o nítido protagonismo do STF. A pesquisa se pautou em aderir uma acepção mais delineada entre ambos os instrumentos. O debate se demonstra relevante em torno do judicial review e sua possível fragilidade frente à democracia a partir da perspectiva de Mark Tushnet. Desta forma, o sistema de controle de constitucionalidade no Brasil, demonstra-se como um poder de revisão judicial superforte, onde a tensão entre sua atribuição judicial de garantia da permanência das limitações constitucionais se eleva ao último grau

Adaptation and validation to Portuguese of the Reasons for Higher Education Dropout Scale

Enquadramento: O abandono escolar é um problema com que os sistemas educacionais se debatem, colocando em causa a qualidade da instituição escolar e do próprio sistema de ensino. Objetivos: Adaptar e avaliar as qualidades psicométricas da Escala de Motivos de Intenção de Abandono do Ensino Superior para os estudantes do ensino superior português. Metodologia: Estudo quantitativo, transversal, descritivo e correlacional. Foi aplicado um questionário de caracterização sociodemográfica e a Escala de Motivos de Intenção de Abandono do Ensino Superior a uma amostra de 891 estudantes, maioritariamente feminina (68,2%), com uma idade média de 19,68 anos. Recorreu-se à análise fatorial exploratória e confirmatória. Resultados: A escala composta por 30 itens, organizados em 4 dimensões: Organizacional; Gestão de vida; Profissional e Relacional. Apresenta uma variância explicada de 46,5%, e um alfa de Cronbach de 0,959. Conclusão: Os resultados apoiam a adequação psicométrica da escala para a população portuguesa, indicando que poderá ser utilizada em ensaios futuros neste âmbito e permitir a implementação de medidas que o contrariem.info:eu-repo/semantics/publishedVersio