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Martins, Joana E. (author), Hooper, Andy (author), Ruigrok, E.N. (author), Draganov, D.S. (author), Hanssen, R.F. (author), White, Robert (author), Soosalu, Heidi (author)Torfajökull is the largest silicic volcanic centre in Iceland lying at the intersection of the rift zone (MidAtlantic Ridge) and the transform zone that connects to Reykjanes peninsula. It erupts infrequently,with only two eruptions in the last 1200 years, the latest of which was over 5 centuries ago. Yet, itsactive tectonic setting, persistent...abstract 2014
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- Verdel, Arie (author), Boullenger, Boris (author), Martins, Joana E. (author), Obermann, Anne (author), Toledo, Tania (author), Jousset, Philippe (author) abstract 2020
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- Martins, Joana E. (author), Obermann, Anne (author), Verdel, Arie (author), Jousset, Philippe (author) abstract 2020
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Ulsen, Carina (author), Kahn, Henrique (author), Antoniassi, Juliana L. (author), Martins, Isabel (author)Abstract only - The existing construction waste recycling technologies and standards have been long applied in construction and demolition (C&D) waste recycling, mainly focused on the production and use of coarse recycled aggregates. Very few papers and process focus on the production of recycled sand although some previous results show that...conference paper 2017
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Martins, C. (author), Dias, A.M.P.G. (author)The effects of the climate changes are becoming more evident in Europe and consequently with a clear effect in the Forest areas. A number of examples were reported of hardwood plantations replacing Norway spruce which is considered as not adapted to altering growth conditions (Schmidt and Knorz, 2010). Portuguese Forest also changed in the last...conference paper 2019
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Loureiro, A. (author), Van der Neut, J.R. (author), Alves, D. (author), Carvalho, J. (author), Afilhado, A. (author), Draganov, D.S. (author), Matias, L. (author), Martins, T. (author)When applying seismic interferometry to image sub-vertical salt flanks or structures with large dips from vertical or deviated wells, we are often confronted with poor target illumination. Strong directionalillumination footprints caused by non-ideal placement of sources at the surface degrade the interferometric image quality and may prevent...conference paper 2012
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Monteiro, S.R.S. (author), Martins, C. (author), Dias, A.M.P.G. (author), Cruz, H. (author)Due to its mechanical properties, Poplar, a fast grown species, was deprecated in relation to stronger species, for several decades. Wood-based products help to change that point of view and Poplar has been gaining its space for structural uses. A state-of-the-art review concerning the use of Poplar to produce glued laminated products, with...conference paper 2019
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Neves, J. (author), Freire, A.C. (author), Roque, A.J. (author), Martins, I.M. (author), Antunes, M.L. (author)SUPREMA – Sustainable Application of Construction and Demolition Recycled Materials in Road Infrastructures was a research project developed by the Laboratório Nacional de Engenharia Civil (LNEC), in cooperation with the University of Lisbon (IST). The use of recycled materials has major environmental and economic benefits. Its recycling...conference paper 2017
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Martins, Carlos (author), Dias, Alfredo M. P. G. (author), Cruz, Helena (author)Portuguese Forest is mainly composed of hardwoods which represented 69% of the forest area in 2010, being Blue gum (Eucalyptus globulus Labill.) the most abundant species (26%) (INCF 2013). The suitability of Blue gum species for structural application was demonstrated in previous studies. However, the most common uses are still related to pulp...conference paper 2019
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Martins, Joana E. (author), Hooper, A.J. (author), Hanssen, R.F. (author)After decades of oil, gas, and coal exploitation, we have learned about some of the unpleasant aftereffects of subsurface resource exploration. Adverse long-term impacts, some known during exploration periods, others only afterwards, may include induced seismicity, land subsidence, or even sinkholes. While geothermal is currently seen as a...conference paper 2021
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Verdel, Arie (author), Boullenger, Boris (author), Martins, Joana E. (author), Obermann, Anne (author), Toledo Zambrano, Tania (author), Jousset, Philippe (author)Integration of results from active seismic, passive seismic and well data reduces the uncertainties of several subsurface parameters that are of interest for cost-effective geothermal production operations in Los Humeros. In this study, we present results from the application of ambient noise seismic interferometry (ANSI) to retrieve zero-offset...conference paper 2019
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Pinto Ribeiro, A. (author), Duivenvoorden, R.R. (author), Martins, Diogo (author)The recent increased interest in distributed propulsion and electric vertical take-off and landing vehicles have made propeller wake interactions with the aircraft more relevant. The interaction between high-lift wings and propeller slipstreams are still not fully understood and several research efforts are being carried out to improve that...conference paper 2023
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Bekési, Eszter (author), Fokker, PA (author), Martins, Joana E. (author), van Wees, Jan-Diederik (author)On the 8th of February 2016, a Mw 4.2 earthquake was detected inside the Los Humeros caldera, located in the eastern sector of the Trans-Mexican Volcanic Belt. The event occurred after a sharp increase in the injection rate at the Los Humeros Geothermal Field and it was recorded by the seismic monitoring network of the power plant. The...conference paper 2019
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Exalto, J.Q.B. (author), Pacini, Bernardo (author), Kaneko, Shugo (author), Martins, Joaquim R. R. A. (author), Hoogreef, M.F.M. (author)Propeller-wing configurations are expected to return to the aviation industry due to their high propulsive efficiency and applicability in urban and regional air mobility. A knowledge gap exists around wing-propeller optimization because of the complexity of the propeller-wing system and the absence of a computationally efficient way to assess...conference paper 2024
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Ðurasević, M. (author), Jakobovic, Domagoj (author), Martins, Marcella Scoczynski Ribeiro (author), Picek, S. (author), Wagner, Markus (author)Genetic programming is an often-used technique for symbolic regression: finding symbolic expressions that match data from an unknown function. To make the symbolic regression more efficient, one can also use dimensionally-aware genetic programming that constrains the physical units of the equation. Nevertheless, there is no formal analysis of...conference paper 2020
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Martins, A.M.P. (author)The activated sludge process is the preferred technology for biological wastewater treatment. Despite decades of progress and operation serious operating problems still occur with this process. One major problem is the regular occurrence of excessive growth of filamentous bacteria, phenomena known as filamentous bulking sludge. Poor solid-liquid...doctoral thesis 2004
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Ehrenfreund, P. (author), Röling, W.F.M. (author), Thiel, C.S. (author), Quinn, R. (author), Sephton, M.A. (author), Stoker, C. (author), Kotler, J.M. (author), Direito, S.O.L. (author), Martins, Z. (author), Orzechowska, G.E. (author), Kidd, R.D. (author), Van Sluis, C.A. (author), Foing, B.H. (author)Several robotic exploration missions will travel to Mars during this decade to investigate habitability and the possible presence of life. Field research at Mars analogue sites such as desert environments can provide important constraints for instrument calibration, landing site strategies and expected life detection targets. We have...journal article 2011
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- Martins, R.F. (author), Rodrigues, H. (author), das Neves, L. Leal (author), Silva, P. Pires da (author) journal article 2013
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Ferreira, M.C. (author), Juliao, M.D. (author), Martins, C.J.A.P, (author), Monteiro, A.M.R.V.L. (author)We point out that existing astrophysical measurements of combinations of the fine-structure constant ?, the proton-to-electron mass ratio ? and the proton gyromagnetic ratio gpgp towards the radio source PKS1413+135 can be used to individually constrain each of these fundamental couplings. While the accuracy of the available measurements is not...journal article 2013
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Ferreira, M.C. (author), Juliao, M.D. (author), Martins, C.J.A.P. (author), Monteiro, A.M.R.V.L. (author)We discuss the usage of measurements of the stability of nature’s fundamental constants coming from comparisons between atomic clocks as a means to constrain coupled variations of these constants in a broad class of unification scenarios. After introducing the phenomenology of these models, we provide updated constraints based on a global...journal article 2012