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Search Results: 1 - 10 of 105882 matches for " Maria Manuel Araújo; "
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O impacto epistemológico das investiga??es sobre "complexidade"
Jorge, Maria Manuel Araújo;
Sociologias , 2006, DOI: 10.1590/S1517-45222006000100003
Abstract: complexity posed as a philosophical idea (even trough it is from the sciences that approach it) was seen by some as the expression of a new "epistemological spirit" that would be changing not only our mechanist image of nature but also our relationship to it and the way we do science, in a more qualitative, less aggressive, and more human approximation. by overcoming traditional reductionism, by acknowledging the autonomy and interrelations of the distinct levels of reality and the symbiosis between order and disorder, regularities and randomness, sciences, assimilating the spirit of complexity, would be open to an awareness of their fundamental limits. by considering the approach of "complex systems" in some disciplines, i argue that, because of demands for effectiveness and objectivity, the search for simplification, compression, and the effort towards "calculation" of all its objects, the typical face of sciences remains, including those of "complexity.
Polyphenol Oxidase Activity and Colour Changes of ‘Starking’ Apple Cubes Coated with Alginate and Dehydrated with Air  [PDF]
Susana Daniela Sousa Fernandes, Catarina Araújo da Silva Ribeiro, Maria Filomena de Jesus Raposo, Rui Manuel Santos Costa de Morais, Alcina Maria Miranda Bernardo de Morais
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.25064
Abstract: The objective was to study the effect of alginate coating on polyphenol oxidase (PPO) activity and colour of ‘Starking’ apple cubes during dehydration with hot air. Apple cubes were dehydrated at 20oC, 35oC, or 40oC, with a parallel airflow. Analysis of PPO activity, colour (L*, a*, b*) and dry matter were performed along the dehydration process at each temperature. All samples presented a peak in relative PPO activity in the beginning of the drying. Exponential models fitted well the experimental data after the peak. Cubes without coating presented lower PPO activity, suggesting lower browning, than coated samples throughout the dehydration process, for all temperatures. Better results for coated samples were obtained with a perpendicular airflow drying at 40oC, after dipping the whole apple in water at 60oC for 10 min. In order to prevent coated samples from browning, drying by perpendicular airflow preceded by a thermal treatment of the whole apple is required.
Dynamics of Primary Productivity and Oceanographic Parameters under Influence of the Amazon River Plume  [PDF]
Amanda Otsuka, Fernando Feitosa, Moacyr Araújo, Dóris Veleda, Maria da Gloria Silva Cunha, Nathalie Lefévre, Felipe Gaspar, Manuel Flores Montes, Gislayne Borges, Carlos Noriega
Open Journal of Ecology (OJE) , 2018, DOI: 10.4236/oje.2018.811035
Abstract: The watershed of the Amazon River discharges about 120,000 m3·s-1of freshwater into the adjacent platform and oceanic region. The aim of this work was to analyze the distribution of oceanographic parameters, chlorophyll a and primary productivity under the influence of the Amazon River plume, during the period of greatest extension of the Amazon plume. Collections were carried out in September 14 in 16 stations including continental platform and oceanic region. It was possible to observe superficial currents along the coast in the northwest direction, but with less intensity and currents with greater speeds towards the east due to the North Brazil Current retroflexion at this time of the year, transporting the plume to the central Atlantic Ocean. The spatial influence of the plume was observed in the salinity, which ranged from 28 to 36.75, although the high precipitation in the region may also have contributed as a source of freshwater. However, the sampled region showed strong negative linear correlation of silicate, chlorophyll a and primary productivity with salinity. The primary productivity values ranged from 0.04 to 18.81 mg C m-3?day-1, whereas chlorophyll a concentrations ranged from 0.15 mg·m-3?to 1.83 mg·m-3, decreasing their values as they move away from the coast. The Amazon River plume can reach and influence the oceanographic and biological parameters in a large area of this oligotrophic region. However, the results also suggest that the export of material from the adjacent coastal region is another determinant of the region’s productivity.
Desafios à pós-gradua o em forma o de professores na Universidade de Aveiro: das inten es às práticas
Maria Helena Sá Araújo e,Nilza Costa,Manuel Bernardo Canha,Isabel Alarc?o
Revista Portuguesa de Educa??o , 2002,
Abstract: This study analyses the impact of the recent masters courses at the Department of Didactics and Educational Technology of the University of Aveiro, Portugal, on the professional development of the basic and secondary school teachers that have attended those courses, as well as on their peers teaching practice. The outcomes, obtained from a questionnaire applied to the master teachers, indicate that, from their view point, the courses have produced effects on the professional development of the teachers that have attended them. However, they also reveal the need to plan strategies that lead to the production of such impact on other subjects.
Micro-computed tomography assessment of human femoral trabecular bone for two disease groups (fragility fracture and coxarthrosis): Age and gender related effects on the microstructure  [PDF]
Ana Catarina Vale, Manuel F. C. Pereira, António Maurício, Bruno Vidal, Ana Rodrigues, Joana Caetano-Lopes, Ara Nazarian, Jo?o E. Fonseca, Helena Canh?o, Maria Fátima Vaz
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.62021

The aim of this study was to identify three-dimensional microstructural changes of trabecular bone with age and gender, using micro-computed tomography. Human trabecular bone from two disease groups, osteoporosis and osteoarthritis was analyzed. A prior analysis of the effects of some procedure variables on the micro-CT results was performed. Preliminary micro-CT scans were performed with three voxel resolutions and two acquisition conditions. On the reconstruction step, the image segmentation was performed with three different threshold values. Samples were collected from patients, with coxarthrosis (osteoarthritis) or fragility fracture (osteoporosis). The specimens of the coxarthrosis group include twenty females and fifteen males, while the fragility fracture group was composed by twenty three females and seven males. The mean age of the population was 69 ± 11 (females) and 67 ± 10 years (males), in the coxarthrosis group, while in the fragility fracture group was 81 ± 6 (females) and 78 ± 6 (males) years. The 30 μm voxel size provided lower percentage difference for the microarchitecture parameters. Acquisition conditions with 160 μA and 60 kV permit the evaluation of all the volume’s sample, with low average values of the coefficients of variation of the microstructural parameters. No statistically significant differences were found between the two diseases groups, neither between genders. However, with aging, there is a decrease of bone volume fraction, trabecular number and fractal dimension, and an increase of structural model index and trabecular separation, for both disease groups and genders. The parameters bone specific surface, trabecular thickness and degree of anisotropy have different behaviors with age, depending on the type of disease. While in coxarthrosis patients, trabecular thickness increases with age, in the fragility fracture group, there is a decrease of trabecular thickness with increasing age. Our findings indicate that disease, age and gender do not provide significant differences in trabecular microstructure. With aging, some parameters exhibit different trends which are possibly related to different mechanisms for

Tireoide ectópica no mediastino anterior
Guimar?es, Maria José Araújo da Cunha;Valente, Carla Manuela Silva;Santos, Lèlita;Baganha, Manuel Fontes;
Jornal Brasileiro de Pneumologia , 2009, DOI: 10.1590/S1806-37132009000400013
Abstract: ectopic thyroid is a rare condition, and its location in the anterior mediastinum is even rarer, there having been only 5 reported cases in the past 30 years. here, we describe 2 clinical cases and present a review of the literature regarding the etiology, embryology and clinical manifestations of ectopic thyroid.
A cidade de Maputo. Espa os contrastantes: do urbano ao rural
Manuel Mendes Araújo
Finisterra - Revista Portuguesa de Geografia , 1999,
Numerical Evaluation of Strength in the Interface during Indentation Spherical Testing in Thin Films  [PDF]
Rodrigo Araújo, Avelino Manuel da Silva Dias
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.53019

The need for more components that are more resistant to wear and corrosion has promoted a growing interest in surface engineering. The search for improved tribological properties in materials contributes to the development of processes that extend the useful life of components and their applications in increasingly severe environments. In this respect, thin ceramic coatings have been used to enhance the tribological properties of components that operate under these conditions. However, new experimental assays are needed to assess the behaviour of these films and their surface as substrate. These experimental analyses require the use of sophisticated equipment and specialized personnel. On the other hand, with advances in computational mechanics, the application of numerical analysis to solve numerous technological problems has been increasingly frequent, owing to its low operational costs. This study aims to simulate an indentation assay with spherical penetrator in systems composed of thin ceramic film deposited on metallic substrate using a Finite Element commercial code. The main objective of this study was to evaluate the field behaviour of stresses in the contact region of the indenter with the sample, on the outline of the impression made by the penetrator and, primarily, on the film-substrate interface.

Cidade de Nampula: a Rainha do Norte de Mo ambique
Manuel Mendes de Araújo
Finisterra - Revista Portuguesa de Geografia , 2005,
Abstract: THE CITY OF NAMPULA: QUEEN OF NORTHERN MOZAMBIQUE. The city ofNampula, located in the Northern hinterland of Mozambique, has always been considered the capital of the North . Founded with the aim of ensuring military control over the colonial penetration of the hinterland, it is an important crossroads where the litoral-hinterland and centre-North axes intersect. Just like Mozambique’sother urban areas, the city of Nampula underwent considerable demographic growth in the period that followed the independence of the country, including the period of civil war and the peace that ensued from 1992 onwards. This demographic growth was the result of a significant migration inflow originating in the rural areas. As the city’s infrastructure and economic activity was unable to keep apace with this growth, the idea of migrating to the city with the aim of improving the livelihood of the migrant population was nothing but a mirage, which eventually resulted in the proliferation of the informal economy as a means of livelihood. The city of concrete still exhibits a series of urban and demographic haracteristics that differ substantially from those of the surrounding urban administrative units.
Recursos humanos, demasiadamente recursos: uma experiência revisitada
Terezinha Maria Araújo
Psicologia em Revista , 2010,
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