45 documents found, page 1 of 5
The effects of vessel traffic on the behavior patterns of common dolphins in th...
Silva, M. M.; Alves Jesus, Nádia; Castro, Joana; Luís, Ana RitaThe impact of vessels on dolphin populations has been extensively studied worldwide. The common dolphin, Delphinus delphis, has been observed in the Tagus estuary for the past two centuries, and during the last several years, these sightings seem to have increased. This area has high levels of maritime traffic throughout the year, both commercial and recreational. To understand the possible effects of vessel tr...
Enhanced performance of solid polymer electrolytes combining poly(vinylidene fl...
Macedo, V. M.; Barbosa, J. C.; Salazar, H.; Fidalgo-Marijuan, A.; Gajjala, R. K. R.; Almásy, L.; Gonçalves, B. F.; Petrenko, V. I.; Silva, M. M.The search for sustainable and high-performance materials for lithium-ion batteries is leading to significant advances in solid polymer electrolyte (SPE) technology. However, the current drawbacks of this approach prove the need for further research and development in the field. Herein, novel ternary solid polymer electrolytes have been developed using varying loads of MOF-808 metal-organic framework and [BMIM]...
Ternary composites of poly(vinylidene fluoride-co-hexafluoropropylene) with sil...
Sengupta, S.; Tubio, C. R.; Pinto, R. S.; Barbosa, J.; Silva, M. M.; Gonçalves, R.; Kundu, M.; Lanceros-Mendez, S.; Costa, C. M.In the realm of polymer composites, there is growing interest in the use of more than one filler for achieving multifunctional properties. In this work, a composite separator membrane has been developed for lithium-ion battery application, by incorporating conductive silver nanowires (AgNWs) and titanium dioxide (TiO2) nanoparticles into a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer matr...
Sustainable lithium-ion battery separators based on poly(3-Hydroxybutyrate-Co-H...
Barbosa, J. C.; Correia, Daniela Maria Silva; Fidalgo-Marijuan, A.; Gonçalves, R.; Fernandes, M.; de Zea Bermudez, V.; Silva, M. M.; Lanceros-Méndez, S.To address the environmental issues related to lithium-ion batteries, environmentally friendlier separators based on poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) membranes are prepared by electrospinning. Cobalt ferrite (CFO) fillers can be incorporated to improve the electrochemical properties of the membranes and it is shown that fiber orientation and CFO filler addition have no relevant effect on the phys...
DevOps benefits: A systematic literature review
Faustino, J; Adriano, D.; Amaro, R. M. D.; Pereira, R.; Silva, M. M.Among current IT work cultures, DevOps stands out as one of the most adopted worldwide. The focus of this culture is on bridging the gap between development and operations teams, enabling collaborative effort toward quickly producing software, without sacrificing its quality and support. DevOps is used to tackle a variety of issues; as such, there are differing benefits reported by authors when performing their...
An IT service management literature review: Challenges, benefits, opportunities...
Serrano, J.; Faustino, J; Adriano, D.; Pereira, R.; Silva, M. M.Information technology (IT) service management is considered a collection of frameworks that support organizations managing services. The implementation of these kinds of frameworks is constantly increasing in the IT service provider domain. The main objective is to define and manage IT services through its life cycle. However, from observing the literature, scarcely any research exists describing the main conc...
Decision factors for remote work adoption: Advantages, disadvantages, driving f...
Ferreira, R; Pereira, R.; Bianchi, I. S.; Silva, M. M.Facing one of the most challenging pandemics for organizational modus operandi (COVID-19), organizations are struggling for operational and strategic support. The adoption of remote work (RW) is increasing. For economic reasons, competitive advantage, or even as a pandemic response (business continuity plan), RW is a domain worth further investigation. However, the literature lacks insight regarding RW adoption...
Ionic liquid based Fluoropolymer solid electrolytes for Lithium-ion batteries
Serra, J. P.; Pinto, R. S.; Barbosa, J. C.; Correia, Daniela Maria Silva; Gonçalves, R.; Silva, M. M.; Lanceros-Méndez, S.; Costa, Carlos Miguel SilvaComposite materials based on ionic liquids (ILs) / poly(vinylidene fluoride) (PVDF) and their copolymers have emerged as an interesting approach to develop high ionic conductivity solid polymer electrolytes (SPEs) for lithium-ion battery application. This work reports the development of SPEs based on fluoropolymers, PVDF and poly(vinylidene fluoride co-hexafluoropropylene), PVDF-HFP, containing different ILs: 1...
Lithium-ion battery separator membranes based on poly(L-lactic acid) biopolymer
Barbosa, J. C.; Reizabal, A.; Correia, Daniela Maria Silva; Fidalgo-Marijuan, A.; Gonçalves, R.; Silva, M. M.; Lanceros-Méndez, S.Sustainable materials are increasingly needed in lithium ion batteries in order to reduce their environmental impact and improve their recyclability. This work reports on the production of separators using poly (L-lactic acid) (PLLA) for lithium ion battery applications. PLLA separators were obtained by solvent casting technique, by varying polymer concentration in solution between 8 wt% and 12 wt% in order to ...
Mesoporous poly(vinylidene fluoride-co-trifluoroethylene) membranes for lithium...
Costa, C. M.; Kundu, Manab; Dias, J. C.; Nunes-Pereira, João; Botelho, Gabriela; Silva, M. M.; Lanceros-Mendez, SenentxuMesoporous separator membranes based on poly(vinylidene fluoride-co-trifluoroethylene), PVDF-TrFE, were prepared through the removal of ZnO nanoparticles from the polymer matrix composite. Different filler concentrations were used, and the evaluation of the morphology, mechanical properties, uptake and ionic conductivity of the membranes were demonstrated that they depend on initial ZnO content in the composite...