39 documents found, page 1 of 4
Lightning modelling in numerical weather prediction
Salgado, Rui; Couto, Flavio; Iakunin, Maksim; Pinto, Paulo; Viegas, Tânia; Pinty, Jean-PierreThe explicit representation of the atmospheric electric field in numerical weather prediction models is a current challenge. This representation will allow a physically based lightning forecast. Present study aims to assess the performance of the Cloud ELectrification and Lightning Scheme (CELLS) [1] coupled to the Meso-NH atmospheric mesoscale research model [2] in simulating Cloud-to-Ground (CG) flashes. The ...
Influence of Convectively Driven Flows in the Course of a Large Fire in Portuga...
Pinto, Paulo; Silva, Álvaro Pimpão; Viegas, Domingos Xavier; Almeida, Miguel; Raposo, Jorge; Ribeiro, Luís MárioThe influence of a mesoscale convective system (MCS) in the evolution of two wildfires that started during the afternoon of 17 June 2017 in Pedrógão Grande, Central Portugal is discussed and analysed using weather radar data, weather stations, video images and fire spread analysis. As the MCS approached the region, its convectively driven flows started to influence the fires. The overturning flows were formed b...
Contribution of a photovoltaic solar system to the energetic sustainability of ...
Eira, Bruno; Pinto, Paulo; Carneiro, Joaquim A. O.The concerning growth of energy and water demand worldwide presents two major issues that can both be tackled by using renewable energy sources to oppose the energy consumption of wastewater treatment plants (WWTP), while taking advantage of their energy production potentialities. This work deals with the sizing of a photovoltaic system of a medium-sized Portuguese WWTP designed to meet the energy consumption n...
Modelling dry thunderstorm environment during a wildfire episode in Portugal
Couto, Flavio; Iakunin, Maksim; Salgado, Rui; Pinto, Paulo; Viegas, Tânia; Pinty, Jean-PierreUnder future climate uncertainties, a better understanding of wildfires is necessary both from physical and operational points of view, which are the goals of the CILIFO (Centro Ibérico para la Investigacion y Lucha contra Incendios Forestales) Interreg POCTEP project. Among several sources of fire ignition, lightnings are the main natural source of wildfires and an important contributor to burned areas in many...
Lightning Prediction with a mesoscale atmospheric model
Salgado, Rui; Couto, Flavio; Iakunin, Maksim; Pinto, Paulo; Viegas, Tânia; Pinty, Jean-PierrePredicting the probability of lightning strikes, particularly under very hot weather, can be useful for assess the risk of natural ignitions. The present study aims to assess the performance of the Cloud Electrification and Lightning Scheme (CELLS) [1] coupled to the Meso-NH atmospheric mesoscale model [2] in simulating Cloud-to-Ground (CG) flashes. For this purpose, a simulation of a case study in which many l...
Lightning modelling for the research of forest fire ignition in Portugal
Couto, Flavio; Iakunin, Maksim; Salgado, Rui; Pinto, Paulo; Viegas, Tânia; Pinty, Jean-PierreThe study aims to assess the applicability of the current Meso-NH electrical scheme (CELLS) in the investigation of forest fire ignition. Therefore, the challenge is to diagnose cloud-to-ground (CG) lightning at 1 km spatial resolution and, subsequently, preferred regions where Forest Fire Events (FFE) could be naturally ignited. The afternoon of 17th June 2017 has been considered for the study, since the dry t...
Bacteria co-culture adhesion on different texturized zirconia surfaces
Dantas, Telma Sofia Alves; Padrão, Jorge; Silva, Mariana Rodrigues da; Pinto, Paulo; Madeira, Sara Cristina Soares; Vaz, Paula; Zille, AndreaZirconia is becoming reckoned as a promising solution for different applications, in particular those within the dental implant investigation field. It has been proved to successfully overcome important limitations of the commonly used titanium implants. The adhesion of microorganisms to the implants, in particular of bacteria, may govern the success or the failure of a dental implant, as the accumulation of ba...
HAL-ASOS accelerator model: evolutive elasticity by design
Silva, Vítor Alberto Teixeira; Pinto, Paulo; Cardoso, Paulo; Cabral, Jorge; Tavares, AdrianoTo address the integration of software threads and hardware accelerators into the Linux Operating System (OS) programming models, an accelerator architecture is proposed, based on micro-programmable hardware system calls, which fully export these resources into the Linux OS user-space through a design-specific virtual file system. The proposed HAL-ASOS accelerator model is split into a user-defined Hardware Tas...
Tribological characterization of dental restorative materials
Carvalho, Amanda; Pinto, Paulo; Madeira, Sara Cristina Soares; Silva, Filipe Samuel; Carvalho, Oscar; Gomes, José R.Human teeth are exposed to a considerable amount of wear on a daily basis due to chemical and mechanical actions. To overcome the damage seen on natural teeth, the dental restorations have been widely used. Like teeth, the restorations are also submitted to shear stresses and, therefore, the evaluation of their tribological behaviour is essential. The aim of this study was to compare the wear behaviour of the m...
Development of a metric of aquatic invertebrates for volunteers (MAIV): a simpl...
Pinto, Paulo; Oliveira Junior, José Max; Leitão, Francisco; Morais, Maria M.; Chicharo, Luis; Vaz, Paula; Delgado, Sofia M. A.; Voreadou, CatherinaCitizen science activities, involving local people in volunteer-supported and sustainable monitoring programs, are common. In this context, the objective of the present work was to develop a simple Metric of Aquatic Invertebrates for Volunteers (MAIV), including a user-friendly tool that can be easily accessed by volunteers, and to evaluate the e ciency of a volunteer monitoring program following an audit proce...