Concepções e práticas dos professores portugueses de ciências naturais, sobre prevenção do consumo de álcool em jovens escolarizados

As orientações curriculares da disciplina de Ciências Naturais do 3. º ciclo do Ensino Básico sugerem a abordagem da problemática do consumo do álcool, na sub-unidade “Opções que interferem no equilíbrio do organismo”, leccionado, no 9. º ano de escolaridade. Neste sentido, esta investigação tem as seguintes finalidades: a) conhecer a opinião dos professores de Ciências Naturais, sobre a problemática do consumo de álcool; b) caracterizar as estratégias que eles utilizam na sua leccionação. Para tal entrevistaram-se sete professores de Ciências Naturais e realizou-se a análise de conteúdo das entrevistas. Os docentes entrevistados afirmam abordar a problemática de forma muito superficial devido à extensão dos programas, da reduzida carga lectiva da disciplina e de não terem formação adequada para efectuar uma prevenção eficaz

Braneworlds scenarios in a gravity model with higher order spatial three-curvature terms

In this work we study a Horava-like five-dimensional model in the context of braneworld theory. To begin with, the equations of motion of such model are obtained and, within the realm of warped geometry, we show that the model is consistent if and only if $\lambda$ takes its relativistic value 1. Furthermore, since the first derivative of the warp factor is discontinuous over the branes, we show that the elimination of problematic terms involving the square of the warp factor second order derivatives are eliminated by imposing detailed balance condition in the bulk. Afterwards, the Israel's junction conditions are computed, allowing the attainment of an effective Lagrangian in the visible brane. In particular, for a (4+1)-dimensional Horava-like model defined in the bulk without cosmological constant, we show that the resultant effective Lagrangian in the brane corresponds to a (3+1)-dimensional Horava-like model with an emergent positive cosmological constant but without detailed balance condition. Now, restoration of detailed balance condition, at this time imposed over the brane, plays an interesting role by fitting accordingly the sign of the arbitrary constant $\beta$ that labels the extra terms in the model, insuring a positive brane tension and a real energy for the graviton within its dispersion relation. To end up with, the brane consistency equations are obtained and, as a result, we show that the detailed balance condition again plays an essential role in eliminating bad behaving terms and that the model admits positive brane tensions in the compactification scheme if, and only if, $\beta$ is negative, what is in accordance with the previous result obtained for the visible brane.Comment: 23 pages, 1 figure, title modifie

Insulin prescribing pattern in geriatric type 2 diabetic mellitus patients of different nutritional status at a tertiary level of health care: a retrospective study

Background: The world, specifically India is witnessing a steady increase in elderly population. The numbers are expected to escalate by 3 million by 2050 considering India alone. Further, the diabetic population is also increasing, and India will be home to the highest population of diabetic patients. It is thus indispensable to understand the prescribing patterns in elderly diabetics where insulin is inevitably added later in the course of diabetes, if not earlier.Methods: Data was extracted from a diabetic registry maintained of patients attending the outpatient departments of a tertiary health care between 2009 to 2012 and having completed one year of regular three-monthly follow ups. Data was entered into MS Excel, analysed using IBM SPSS software and presented in the form of percentages or averages.Results: Out of the total 180 male predominated type 2 diabetics aged 60 years and above, 142 (78.8%) elderly patients received a single type of insulin each day. 102 (56.6%) patients were on human insulins while 82 (45.5%) were receiving analogues. As for premixed insulins, 62 (34.4%) patients were receiving biphasic insulin analogues, while 83 (46.1%) patients were receiving human premixed insulin.Conclusions: The elderly population makes up for a huge proportion and is set to increase in the coming years. The insulin prescribing pattern in them needs to be tailor-made to suit their needs and preferences whilst maintaining a relaxed target of HbA1c control at 8mg% or less. However, it should not be too low so as to avoid unnecessary hypoglycaemic episodes

Produção de grãos em ambientes com nematoides de galhas.

bitstream/CNPSO/2747/1/doc168.pd

Caracterização estrutural e paragenética do Campo Pegmatítico do Licungo (Mocuba, Moçambique): identificação de recursos base associados

Publicado em "A engenharia no combate à pobreza, pelo desenvolvimento e competitividade", ISBN 978-972-8826-19-2Geological thematic mapping in Licungo pegmatite field (Mocuba, Mozambique) has clarified the distribution of mineral resources in NYF hyperaluminous pegmatites and revealed its structural control. Two distinct spatial and deformational areas can be distinguished. In the north structural domain, large pegmatites are associated with early tangential tectonic. Besides feldspar with ceramic qualification, industrial beryl and gems are also non-systematic resources. Small pegmatite dykes predominate in the south domain and their emplacement is conditioned by later distensive phases (Dn+1 and Dn+2). Their economic interest comes from gem beryl enrichment and its crystallisation as true-blue varieties

Astrometry of mutual approximations between natural satellites. Application to the Galilean moons

Typically we can deliver astrometric positions of natural satellites with errors in the 50-150 mas range. Apparent distances from mutual phenomena, have much smaller errors, less than 10 mas. However, this method can only be applied during the equinox of the planets. We developed a method that can provide accurate astrometric data for natural satellites -- the mutual approximations. The method can be applied when any two satellites pass close by each other in the apparent sky plane. The fundamental parameter is the central instant $t_0$ of the passage when the distances reach a minimum. We applied the method for the Galilean moons. All observations were made with a 0.6 m telescope with a narrow-band filter centred at 889 nm with width of 15 nm which attenuated Jupiter's scattered light. We obtained central instants for 14 mutual approximations observed in 2014-2015. We determined $t_0$ with an average precision of 3.42 mas (10.43 km). For comparison, we also applied the method for 5 occultations in the 2009 mutual phenomena campaign and for 22 occultations in the 2014-2015 campaign. The comparisons of $t_0$ determined by our method with the results from mutual phenomena show an agreement by less than 1-sigma error in $t_0$, typically less than 10 mas. This new method is particularly suitable for observations by small telescopes.Comment: 13 pages, 11 figures and 8 tables. Based on observations made at the Laborat\'orio Nacional de Astrof\'isica (LNA), Itajub\'a-MG, Brazi

Potencial de Mimosa acutistipula (MART.) BENTH. e Senegalia paraensis (DUCKE) Seigler & Ebinger para revegetação de áreas contaminadas por arsênio.

O presente trabalho teve como objetivo avaliar o crescimento de Mimosa acutistipula (Mart.) Benth. e Senegalia paraensis (Ducke) Seigler & Ebinger cultivadas em solo com diferentes concentrações de arsênio. Os ensaios foram conduzidos em casa de vegetação em blocos casualizados com quatro repetições

Evaluation of the teachers’ digital competences in primary and secondary education in Portugal with DigCompEdu checkIn in pandemic times

The current pandemic crisis the world is living in has brought new and emerging challenges to teachers, making it essential to acquire digital skills, especially in virtual learning environments and online technologies. In this sense, from the DigCompEdu CheckIn self-assessment questionnaire, validated for the Portuguese population by Dias-Trindade, Moreira, and Nunes (2019), the research presented in this paper aims to identify the most fragile and robust areas of digital skills of primary and secondary education (ISCED) perceived by teachers in Portugal. The quantitative methodological approach emphasizes teachers' perception of their digital skills in three dimensions: teachers’ professional competences, teachers’ pedagogical competences and students' competences and involved 434 teachers from mainland Portugal and the Autonomous Regions. The results allow us to conclude that teachers have an overall moderate level of digital proficiency – level B1 - Integrators – and the dimensions pedagogical competences and students’ competences are those where teachers have more weaknesses than in other levels. From a panorama observed before the onset of the COVID-19 pandemic, it is possible to understand their needs regarding work that involves digital technologies at different moments in the teaching activity. The results thus, show the need for teachers to increase their level of digital competence through specific training and the importance of developing public policies that prepare teachers for a more digital school.info:eu-repo/semantics/publishedVersio

Ophthalmoplegic Migraine and Infundibular Dilatation of a Cerebral Artery

Ophthalmoplegic migraine (OM) is a childhood disorder of uncertain etiology manifesting recurrent unilateral headache associated with a transitory oculomotor (usually IIIrd nerve) palsy. Recent publications emphasize the finding on MRI of contrast enhancement in the IIIrd nerve suggesting that OM may be a recurrent inflammatory neuropathy. We report the case of a 7-year-old boy with typical symptoms of this disorder. Angio MR and Angio CT revealed the presence of an infundibular dilatation of a perforating branch of the posterior cerebral artery adjacent to the symptomatic IIIrd nerve. We speculate that this and perhaps other cases of OM may have a different pathophysiology related to compression of the IIIrd nerve by an adjacent vascular structure that could activate the trigeminovascular system and produce migrainous pain

Topazite from Minas Velhas da Queiriga (Viseu, Portugal) and related mineralizations – structural and paragenetic analysis

As Minas Velhas da Queiriga constituem uma ocorrência de topázio com expressão diversificada: porfiroblástico em turmalinitos, venular pegmatóide zonado com mineralizações relacionadas (topazito) e vénular quartzo-albítico, presente em brechas turmalínicas (ongonito). Deverá relacionar-se com uma anomalia primitiva em B e F herdada de protólitos exalíticos, e com a cristalização decorrente de diferenciados graníticos residuais hiperaluminosos, instalados em condições de “uplifting” sobre uma cúpula granítica oculta.Distinct topaz paragenesis occur in Minas Velhas da Queiriga: as porphyroblasts in tourmalinites, as comb-crystals at the border of quartz veins (topazite) and in tourmaline-rich breccias linked to cross-cut quartz-albitic veinlets (ongonite). The observed occurrence is probably related to anomalous concentrations of B and F possibly inherited from enriched protolithic fonts of exhalative nature, and result from extreme fractionation of hyper-aluminous melt, emplaced during uplifting, above a hidden granitic plutonite