A5100740700- Stellar, planetary, and galactic studies
- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Ionosphere and magnetosphere dynamics
- Solar Radiation and Photovoltaics
- Geomagnetism and Paleomagnetism Studies
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Fluid Dynamics and Turbulent Flows
- Health, Nursing, Elderly Care
- Energy Load and Power Forecasting
- Geography and Environmental Studies
- Astrophysical Phenomena and Observations
- Geotechnical and Geomechanical Engineering
- Child Nutrition and Feeding Issues
- Autonomous Vehicle Technology and Safety
- Advanced Sensor Technologies Research
- Cardiovascular Issues in Pregnancy
- Space Exploration and Technology
- Pregnancy and preeclampsia studies
- Infrastructure Maintenance and Monitoring
- Pregnancy and Medication Impact
- Meteorological Phenomena and Simulations
- Youth, Drugs, and Violence
Institute of Astrophysics and Space Sciences
2010-2024
Universidade Evangelica de Goiás
2024
Solução Ambiental Assessoria e Consultoria
2024
Universidade do Porto
2005-2022
Centre for Astrophysics of the University of Porto
1996-2014
University of Lisbon
2012
Young massive clusters (YMCs) with stellar masses of 104–105 M☉ and core densities stars per cubic pc are thought to be the "missing link" between open extreme extragalactic super star globular clusters. As such, studying initial conditions YMCs offers an opportunity test cluster formation models across full mass range. G0.253 + 0.016 is excellent candidate YMC progenitor. We make use existing multi-wavelength data including recently available far-IR continuum (Herschel/Herschel Infrared...
Objetivo: Avaliar a eficácia do uso profilático de aspirina na redução da incidência pré-eclâmpsia em gestantes alto risco. Métodos: Trata-se uma revisão integrativa literatura realizada através das bases PubMED, Biblioteca Virtual Saúde (BVS) e Periódico CAPES, usando os descritores: ”Aspirin”, “Effects”, “Pre-Eclampsia”, “Prevention” obtendo o truncamento pesquisa: (Effects) AND (Aspirin) (Prevention) (Pre-Eclampsia). Foram encontrados 1.122 artigos, filtrados conforme critérios inclusão...
Solar wind forecasting is a core component of Space Weather, field that has been the target many novel machine-learning approaches. The continuous monitoring Sun provided an ever-growing ensemble observations, facilitating development models predict solar properties on Earth and other celestial objects within system. This enables us to prepare for mitigate effects wind-related events space. performance some simulation-based depends heavily quality initial guesses used as conditions. work...
Rotation measurement in jets from T Tauri stars is a rather difficult task. Some seem to be rotating direction opposite that of the underlying disk, although it not yet clear if this affects totality or part outflows. On other hand, Ulysses data also suggest solar wind may rotate two ways between northern and southern hemispheres. We show result as surprising emerges naturally ideal MHD equations. Specifically, counterrotating neither contradict magnetocentrifugal driving flow nor prevent...
Context. A large sample of T Tauri stars exhibits optical jets, approximately half which rotate slowly, only at ten per cent their breakup velocity. The disk-locking mechanism has been shown to be inefficient explain this observational fact.
We assess a physically feasible explanation for the low number of discovered (near-)grazing planetary transits through all ground and space based transit surveys. performed simulations to generate synthetic distribution detectable planets on their impact parameter, found that larger should have been detected than detected. Our insufficient is simple assumption large host stars which harbor dark giant polar spot, thus light-curve vanishes due occultation grazing planet spot. conclude by...
A new class of analytical 2-D solutions the full set steady magnetohydrodynamic (MHD) equations, describing an axisymmetric helicoidal magnetized outflow originating from a rotating central object, is presented. The are systematically obtained via nonlinear separation variables in momentum equation. analysis yields three parameters which measure anisotropy latitudinal distribution various flow quantities. Topologically, wind speed controlled by X-type critical point that acts to filter out...
Young stellar object observations suggest that some jets rotate in the opposite direction with respect to their disk. In a recent study, Sauty et al. showed this does not contradict magnetocentrifugal mechanism is believed launch such outflows. Motion signatures are transverse jet axis, two directions, have recently been measured M87. One possible interpretation of motion counter-rotating knots. Here, we extend our previous analytical derivation counter-rotation relativistic jets,...
Abstract Experimental teaching is essential for a good understanding of science, especially on Physics. Practical activities play an important role engaging students with mainly when they interact directly equipment, collect experimental data computers and/or use interactive software analysis. In this work, we present the low-cost mini-robots as ‘object-to-think-with’ and learning technology. The activity concerns programming robots to make them run in circular paths, record videos their...
Exact axisymmetric analytical solutions of the governing MHD equations for magnetized and rotating outflows are applied to solar wind during minimum as observed by ULYSSES. Using spacecraft data, latitudinal dependences physical quantities such density, velocity, magnetic field temperature analytically described. The self-similar then compared global structure from one radius 5 AU beyond, including consistently rotation outflow. model makes it possible describe initial flaring dipolar...
Small cyclic variations in the frequencies of acoustic modes are expected to be a common phenomenon solar-like pulsators, as result stellar magnetic activity cycles. The frequency observed throughout solar and cycles contain information about structural changes that take place inside stars well field structure intensity. task inferring disentangling is, however, not trivial one. In sun direct effect on oscillations might significantly important regions strong (such solar/stellar spots),...
The heliolatitudinal dependence of observations the solar wind macroscopic quantities such as averaged proton speed and density is modelled during minimum conditions when rotational magnetic axes roughly coincide. Published via technique interplanetary scintillations for previous two cycles were used, well recent data from plasma experiment aboard ULYSSES spacecraft, which also refer to declining phase present cycle. A class exact, two‐dimensional solutions full set steady HD equations used...
Aims.In a previous work, Ulysses data was analyzed to build complete axisymmetric MHD solution for the solar wind at minimum including rotation and initial flaring of in low corona. This model has some problems reproducing values magnetic field 1 AU despite correct velocity. Here, we intend extend analysis another type solutions improve our modelling from surface AU.
Context.The existence of rapidly rotating cool stars in young clusters implies a reduction angular momentum loss rate for certain period the star's early life. Recently, concentration magnetic flux near poles these has been proposed as an alternative mechanism to dynamo saturation order explain loss.
In previous work, an Artificial Neural Network (ANN) was developed to automate the estimation of solar wind profiles used as initial conditions in MULTI-VP simulations. This approach, coupled with profile clustering, reduced time previously required for by MULTI-VP, enhancing efficiency simulation process. It observed that generating estimates closer final led computation time, a mean speedup 1.13. Additionally, this adjustment yielded twofold advantage: it minimized amplitude spurious...
Objetivo: Investigar a produção científica sobre o uso do fármaco naltrexona no tratamento da dependência alcoólica. Método: Estudo exploratório-descritivo, tipo revisão sistemática integrativa com análise bibliométrica. Realizou-se busca das publicações sítio Periódicos Capes, BVS e SciELO, período de março abril 2024. Para na base dados foram usados os descritores “Naltrexona” “Alcoolismo”, qual inseridos avançada utilizando operador booleano “and”. Foram utilizados filtros bases, sendo...
In this article, we explore the implementation and effectiveness of collaborative logistics systems (CLS) as an innovative approach to reducing environmental footprints in global supply chains. While traditional often generate redundancies inefficiencies, CLS stand out by promoting integration resources reduction waste, enhancing positive impact through coordination between multiple market players. Based on a detailed literature review analysis case studies, propose theoretical model that...
Objetivo: Avaliar a eficácia de intervenções com probióticos, prebióticos e dieta na melhoria dos sintomas transtornos mentais, como depressão ansiedade, seu impacto vida pacientes. Métodos: Revisão integrativa da literatura realizada nas bases PubMed, CAPES BVS, usando os descritores "Mental Disorders", "Gut Microbiota" "Probiotics" obtendo o truncamento pesquisa: (Critical Care) AND (Intensive Care Units) (Surgical Procedures, Operative) (Patient Monitoring). Foram incluídos 18 artigos...