Contributos do associativismo na (re)constru����o da identidade profissional dos professores de matem��tica do 2�� ciclo

Disserta����o apresentada na Escola Superior de Educa����o de Lisboa para obten����o do grau de Mestre em Educa����o Matem��tica na Educa����o Pr��-escolar e no 1�� e 2�� ciclos do Ensino B��sico

Classifica����o de empreendimentos super prime: aplica����o ao caso pr��tico - Pal��cio Estoril Resid��ncias

O tema deste trabalho visa abordar a Constru����o de Edif��cios Residenciais de caracter��sticas singulares no mercado da Constru����o / Imobili��rio, nomeadamente no que diz respeito �� garantia das caracter��sticas a eles impl��citas. Assim, abordam-se conseitos como a diferencia����o e customiza����o na constru����o, a especializa����o da equipa de trabalho e a classifica����o de empreendimentos, aqui designados como Super Prime. Um empreendimento Super Prime deve permitir alcan��ar um modo de vida bastante particular, movido pelo gosto, pela ostenta����o e pelo prazer. Um produto com estas caracter��sticas deve ser definido pela sua qualidade, exclusividade, criatividade, marca, emo����o, autenticidade, prest��gio e glamour. Num sector em constante mudan��a, cada vez mais exigente e competitivo e altamente dependente do mercado econ��mico, facilmente se compreende a necessidade de diferencia����o na constru����o de im��veis e da consciencializa����o do consumidor para a qualidade dos produtos. No entanto, n��o existe nenhuma metodologia, quer a n��vel nacional, quer a n��vel internacional, que garanta este conceito de classifica����o de edif��cios residenciais. Este facto levou �� proposta de uma Metodologia de Classifica����o de Empreendimentos Super Prime, que se designou por MCESP, e que tem como objectivo principal a verifica����o do cumprimento dos requisitos t��cnicos impl��citos a estes empreendimentos, possibilitando a sua classifica����o dentro desse segmento. Desta forma, identificaram-se esses requisitos t��cnicos, definiu-se uma hierarquia l��gica de exig��ncias a cumprir, procedeu-se �� distin����o qualitativa de cada caracter��stica apresentada e obteve-se uma avalia����o num��rica, gr��fica e justificativa. De uma forma geral, a proposta deste m��todo de classifica����o surge como um crit��rio de diferencia����o e de notoriedade para empreiteiros, donos de obra e promotores, aumentando a rentabilidade e competitividade de uma empresa. A sua adop����o possibilita a optimiza����o de solu����es, o aumento do n��vel de confian��a dos clientes e o aumento de prest��gio das suas empresas. Procurou-se igualmente, contribuir para o avan��o do conhecimento no campo da tecnologia de constru����o residencial Super Prime, apoiando a inova����o, o desenvolvimento e a personaliza����o, contribuindo para um melhor produto final.

Variation of magnetic properties in sedimentary rocks hosting the Foum Zguid dyke (southern Morocco): Combined effects of re-crystallization and Fe-metasomatism

The effects of dyke intrusion on the magnetic properties of host sedimentary rocks are still poorly understood. Therefore, we have evaluated bulk magnetic parameters of standard palaeomagnetic samples collected along several sections across the sediments hosting the Foum Zguid dyke in southern Morocco. The study has been completed with the evaluation of the magnetic fabric after laboratory application of sequential heating experiments. The present study shows that: (1) close to Fourn Zguid dykes, the variations of the bulk magnetic parameters and of the magnetic fabric is strongly related with re-crystallization and Fe-metasomatism intensity. (2) The thermal experiments on AMS of samples collected farther from the dyke and, thus, less affected by heating during dyke emplacement, indicate that 300-400 degrees C is the minimum experimental temperature necessary to trigger appreciable transformations of the pre-existing magnetic fabrics. For temperatures higher than ca. 580 degrees C, the magnetic fabric transformations are fully realized, with complete transposition of the initial fabric to a fabric similar to that of samples collected close to the dyke. Therefore, measured variations of the magnetic fabric can be used to evaluate re-crystallization temperatures experienced by the host sedimentary rock during dyke emplacement. The distinct magnetic behaviour observed along the cross-sections strongly suggests that samples collected farther from the dyke margins did not experience thermal episodes with temperatures higher than 300 degrees C after dyke emplacement. (3) AMS data shows a gradual variation of the magnetic fabric with distance from the dyke margin, from sub-horizontal K-3 away from the dyke to vertical K3 close to the dyke. Experimental heating shows that heat alone can be responsible for this strong variation. Therefore, such orientation changes should not be unequivocally interpreted as the result of a stress field (resulting from the emplacement of the dyke, for instance). (4) Magnetic studies prove to be a very sensitive tool to assess rock magnetic transformations, thermally and chemically induced by dyke intrusion in hosting sediments.

OC/EC ratio observations in Europe: Re-thinking the approach for apportionment between primary and secondary organic carbon

This study explores a large set of OC and EC measurements in PM(10) and PM(2.5) aerosol samples, undertaken with a long term constant analytical methodology, to evaluate the capability of the OC/EC minimum ratio to represent the ratio between the OC and EC aerosol components resulting from fossil fuel combustion (OC(ff)/EC(ff)). The data set covers a wide geographical area in Europe, but with a particular focus upon Portugal, Spain and the United Kingdom, and includes a great variety of sites: urban (background, kerbside and tunnel), industrial, rural and remote. The highest minimum ratios were found in samples from remote and rural sites. Urban background sites have shown spatially and temporally consistent minimum ratios, of around 1.0 for PM(10) and 0.7 for PM(2.5).The consistency of results has suggested that the method could be used as a tool to derive the ratio between OC and EC from fossil fuel combustion and consequently to differentiate OC from primary and secondary sources. To explore this capability, OC and EC measurements were performed in a busy roadway tunnel in central Lisbon. The OC/EC ratio, which reflected the composition of vehicle combustion emissions, was in the range of 03-0.4. Ratios of OC/EC in roadside increment air (roadside minus urban background) in Birmingham, UK also lie within the range 03-0.4. Additional measurements were performed under heavy traffic conditions at two double kerbside sites located in the centre of Lisbon and Madrid. The OC/EC minimum ratios observed at both sites were found to be between those of the tunnel and those of urban background air, suggesting that minimum values commonly obtained for this parameter in open urban atmospheres over-predict the direct emissions of OC(ff) from road transport. Possible reasons for this discrepancy are explored. (C) 2011 Elsevier Ltd. All rights reserved.

Re-entrant phase behaviour of network fluids: A patchy particle model with temperature-dependent valence

We study a model consisting of particles with dissimilar bonding sites ("patches"), which exhibits self-assembly into chains connected by Y-junctions, and investigate its phase behaviour by both simulations and theory. We show that, as the energy cost epsilon(j) of forming Y-junctions increases, the extent of the liquid-vapour coexistence region at lower temperatures and densities is reduced. The phase diagram thus acquires a characteristic "pinched" shape in which the liquid branch density decreases as the temperature is lowered. To our knowledge, this is the first model in which the predicted topological phase transition between a fluid composed of short chains and a fluid rich in Y-junctions is actually observed. Above a certain threshold for epsilon(j), condensation ceases to exist because the entropy gain of forming Y-junctions can no longer offset their energy cost. We also show that the properties of these phase diagrams can be understood in terms of a temperature-dependent effective valence of the patchy particles. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3605703]

Re-evaluation of a reported increased micronucleus frequency in lymphocytes of workers occupationally exposed to formaldehyde

A replicate evaluation of increased micronucleus (MN) frequencies in peripheral lymphocytes of workers occupationally exposed to formaldehyde (FA) was undertaken to verify the observed effect and to determine scoring variability. May���Gr��nwald���Giemsa-stained slides were obtained from a previously performed cytokinesis-block micronucleus test (CBMNT) with 56 workers in anatomy and pathology laboratories and 85 controls. The first evaluation by one scorer (scorer 1) had led to a highly significant difference between workers and controls (3.96 vs 0.81 MN per 1000 cells). The slides were coded before re-evaluation and the code was broken after the complete re-evaluation of the study. A total of 1000 binucleated cells (BNC) were analysed per subject and the frequency of MN (in ���) was determined. Slides were distributed equally and randomly between two scorers, so that the scorers had no knowledge of the exposure status. Scorer 2 (32 exposed, 36 controls) measured increased MN frequencies in exposed workers (9.88 vs 6.81). Statistical analysis with the two-sample Wilcoxon test indicated that this difference was not significant (p = 0.17). Scorer 3 (20 exposed, 46 controls) obtained a similar result, but slightly higher values for the comparison of exposed and controls (19.0 vs 12.89; p = 0.089). Combining the results of the two scorers (13.38 vs 10.22), a significant difference between exposed and controls (p = 0.028) was obtained when the stratified Wilcoxon test with the scorers as strata was applied. Interestingly, the re-evaluation of the slides led to clearly higher MN frequencies for exposed and controls compared with the first evaluation. Bland���Altman plots indicated that the agreement between the measurements of the different scorers was very poor, as shown by mean differences of 5.9 between scorer 1 and scorer 2 and 13.0 between scorer 1 and scorer 3. Calculation of the intra-class correlation coefficient (ICC) revealed that all scorer comparisons in this study were far from acceptable for the reliability of this assay. Possible implications for the use of the CBMNT in human biomonitoring studies are discussed.

Structural characterization of Co���Re superlattices

Co���Re superlattices were prepared with nominal periodicities of 65���67 �� and varying bilayer composition. The structural characterization was made by x���ray diffraction and Rutherford backscattering spectrometry (RBS). First, second, and third order satellites are observed in the x���ray diffractogram at 2�� values and with intensities close to those predicted by simulation. This confirms the coherence of the superlattice. RBS measurements combined with RUMP simulations give information on interface sharpness and the absolute thicknesses of the Co and Re layers. Discrepancies between the experimental and simulated diffractograms are found for Co thicknesses below 18 ��.

A balance between image quality and effective dose in orbital X-ray screening for ferromagnetic IOFBs: a pilot study

Purpose: To investigate whether standard X-ray acquisition factors for orbital radiographs are suitable for the detection of ferromagnetic intra-ocular foreign bodies in patients undergoing MRI. Method: 35 observers, at varied levels of education in radiography, attending a European Dose Optimisation EURASMUS Summer School were asked to score 24 images of varying acquisition factors against a clinical standard (reference image) using two alternative forced choice. The observers were provided with 12 questions and a 5 point Likert scale. Statistical tests were used to validate the scale, and scale reliability was also measured. The images which scored equal to, or better than, the reference image (36) were ranked alongside their corresponding effective dose (E), the image with the lowest dose equal to or better than the reference is considered the new optimum acquisition factors. Results: Four images emerged as equal to, or better than, the reference in terms of image quality. The images were then ranked in order of E. Only one image that scored the same as the reference had a lower dose. The reference image had a mean E of 3.31��Sv, the image that scored the same had an E of 1.8��Sv. Conclusion: Against the current clinical standard exposure factors of 70kVp, 20mAs and the use of an anti- scatter grid, one image proved to have a lower E whilst maintaining the same level of image quality and lesion visibility. It is suggested that the new exposure factors should be 60kVp, 20mAs and still include the use of an anti-scatter grid.

Das perce����es das crian��as sobre alguns animais mal-afamados �� sua (re) constru����o em contexto de sala de aula

Relat��rio de Est��gio apresentado �� Escola Superior de Educa����o de Lisboa para obten����o do grau de mestre em Ensino do 1.�� e 2.�� Ciclo do Ensino B��sico

(Re)conhecer emo����es atrav��s do teatro: a academia internacional de teatro para jovens e o clube de drama da Escola Paula Vicente: trabalho de projeto

Trabalho de Projeto submetido �� Escola Superior de Teatro e Cinema para cumprimento dos requisitos necess��rios �� obten����o do grau de Mestre em Teatro - especializa����o em Teatro e Comunidade.