43 documents found, page 1 of 5
Anthropogenic food subsidies reshape the migratory behaviour of a long-distance...
Marcelino, J.; Franco, A.M.A.; Acácio, M.; Soriano-Redondo, A.; Moreira, F.; Catry, I.Bird migratory journeys are often long and hostile, requiring high energetic expenditure, and thus forcing birds to pause between migratory flights. Stopover sites allow migrants to replenish fuel reserves and rest, being crucial for the success of migration. Worldwide, the increasing accumulation of waste on landfills and rubbish dumps has been described to provide superabundant food resources for many bird sp...
Extreme events are more likely to affect the breeding success of lesser kestrel...
Marcelino, J.; Silva, J. P.; Gameiro, J.; Silva, A.; Rego, F. C.; Moreira, F.; Catry, I.Climate change is predicted to severely impact interactions between prey, predators and habitats. In Southern Europe, within the Mediterranean climate, herbaceous vegetation achieves its maximum growth in middle spring followed by a three-month dry summer, limiting prey availability for insectivorous birds. Lesser kestrels (Falco naumanni) breed in a time-window that matches the nestling-rearing period with the...
Extreme events are more likely to affect the breeding success of lesser kestrel...
Marcelino, J.; Silva, J.P.; Gameiro, J.; Silva, A.; Rego, Francisco Castro; Moreira, Francisco; Catry, InêsClimate change is predicted to severely impact interactions between prey, predators and habitats. In Southern Europe, within the Mediterranean climate, herbaceous vegetation achieves its maximum growth in middle spring followed by a three-month dry summer, limiting prey availability for insectivorous birds. Lesser kestrels (Falco naumanni) breed in a time-window that matches the nestling-rearing period with the...
Development of design capabilities in smaller companies in the automotive indus...
Santos, Ricardo Cameira dos; Camacho, J.; Marcelino, J.ABSTRACT: This paper reflects part of a broader investigation on the development of methodologies to identify, value and manage design capabilities in order to create a sustainable competitive advantage. With the automotive industry and smaller supplier Portuguese companies as background, this paper explores the resource-based view theory (RBV) and the dynamic capabilities theory as a theoretical construct for ...
Public communication by climate scientists: what, with whom and why?
Entradas, M.; Marcelino, J.; Bauer, M. W.; Lewenstein, B.Public communication of science has increasingly been recognised as a responsibility of scientists (Leshner, Science p. 977, 2003). Climate scientists are often reminded of their responsibility to participate in the public climate debate and to engage the public in meaningful conversations that contribute to policy-making (Fischhoff 2013). However, our understanding about climate scientists’ interactions with t...
3D Analysis of Montesinho CFRD using Code-Aster FEM program
Marcelino, J.; Manso, J.; Caldeira, L.This paper describes the setup of a finite element method (FEM) model for the three dimensional simulation of the construction of a concrete face rockfill dam and filling of the its reservoir using the Code-Aster code. The prototype of the study is the 36.5 m high Montesinho dam, located in the north of Portugal near the Spain border, witch is finishing its construction, at the time of the paper writing. The da...
Crushing and oedometric deformation of rockfill using DEM
Manso, J.; Marcelino, J.; Caldeira, L.The behavior of rockfill may be simulated using the discrete element (particle) modelling. Although its main advantage consists of not requiring the formulation of complex constitutive models, it requires extensive calibration to determine the particle–contact parameters in order to predict the macro-scale response. In this paper, the authors performed computer simulations of crushable agglomerates using distin...
Estudo das propriedades mecânicas de partículas de enrocamento através do ensai...
Manso, J.; Marcelino, J.O comportamento dos materiais de enrocamento é fortemente condicionado pela resistência ao esmagamento das suas partículas. A resposta deformacional de um provete de ensaio resulta na rotura dos elementos de rocha, quando as tensões de contacto ultrapassam a resistência ao esmagamento, ou de um rearranjo das suas partículas, até se atingir um estado de equilíbrio. É sabido que certos aspetos do comportamento de...
Valtorno-Mourão Dam. Reinforcement of the foundation grout due to problems dete...
Marcelino, J.; Paixão, J. B.The Valtorno-Mourão dam in the municipality of Vila Flor is intended to create a reservoir with the total volume of 1.12 x106 m3 for water supply. The embankment has a crest length of 150 m and 32 m of maximum height. It as a homogeneous profile including a sub-vertical filter. The construction of the dam took place between July 2004 and January 2006. During the first filling, the comparison of the results of m...
Modelos de comportamento da barragem de Massingir em Moçambique
Marcelino, J.; Portugal, J. C.A barragem de Massingir, com quase 5 km de comprimento e uma altura máxima de 47 m é constituída por um aterro zonado e encontra-se em exploração há cerca de 30 anos. Esta barragem, uma das maiores de Moçambique, exibiu, logo após o início da exploração problemas de comportamento da fundação. A sua exploração ficou, então, condicionada e só após obras de reabilitação concluídas em 2006, se iniciou a exploração ...