Lisbon street campaign against ageism: a promising multi-stakeholder initiative

info:eu-repo/semantics/acceptedVersio

Rossby waves in rapidly rotating Bose-Einstein condensates

We predict and describe a new collective mode in rotating Bose-Einstein condensates, which is very similar to the Rossby waves in geophysics. In the regime of fast rotation, the Coriolis force dominates the dynamics and acts as a restoring force for acoustic-drift waves along the condensate. We derive a nonlinear equation that includes the effects of both the zero-point pressure and the anharmonicity of the trap. It is shown that such waves have negative phase speed, propagating in the opposite sense of the rotation. We discuss different equilibrium configurations and compare with those resulting from the Thomas-Fermi approximation.Comment: 4 pages, 2 figures (submitted to PRL

Children’s attitudes toward older people: current and future directions

The children of today will be the adults of tomorrow and thus their attitudes toward older people lay the ground for their future self-concept and psychological well-being. Understanding how young children perceive older people is thus of crucial importance in an ageing world. The literature suggests mixed findings regarding the existence of ageism among children, which may be an artifact of the diversity measures used. This chapter presents a literature review that assesses most of these measures to assess children’s attitudes regarding older people and the assorted findings. We propose a classification based on two criteria: (i) the dimensions covered – cognitive, affective and behavioral (tripartite model of attitudes) and (ii) the four automaticity features (consciousness, controllability, intentionality and efficacy) which together led us to classify measures into three categories: solely explicit, solely implicit and partially both explicit and implicit measures. Based on this categorization, we delineate distinct patterns of results, associated with the participant’s age. In studies using explicit measures or a combination of both explicit and implicit measures, children revealed more positive or mixed attitudes regarding older people. The most positive attitudes were found in studies with older children and adolescents (e.g. using the Tuckman-Lorge Older People Scale”). When implicit measures were used, a different pattern of results emerged. Children expressed negative attitudes toward older people across childhood (e.g. behavioral measure). Based on this pattern of evidence, we make recommendations regarding the improvement of measures to assess children’s attitudes toward older people at different points in their social development.info:eu-repo/semantics/publishedVersio

Reconfiguring the battery innovation landscape

Batteries are critical for energy transition strategies. This paper offers a comprehensive assessment of the trends and developments of battery innovation. Over 700,000 patents from the period of 2005-2019 are compiled and analyzed. Leading patent applicants and countries of origin are identified. Major patent applicants are mostly large East Asian companies, while Japan and South Korea are the leading countries followed by the US, Germany, and China. Different battery designs, the main battery components, and interactions with other clean technologies are examined. Based on the operative definitions for incremental/radical and product/process innovations, a battery innovation typology is set forth. Main findings are that patenting in batteries has risen robustly and lithium-ion is the most vibrant technology; the lead-acid set-up maintains consistent innovation activity, lithium-sulfur and flow batteries are the most notable emerging technologies; electrodes are the most salient battery component, followed by electrolytes, separators, and cell housing; the most significant interactions of batteries with clean energy technologies are between battery charging and photovoltaic energy as well as between battery charging and electric vehicles. Incremental innovation represents more than half of patents, while product innovation represents approximately 70% of total patents.info:eu-repo/semantics/publishedVersio

Solanáceas silvestres: potencial de uso como porta-enxertos resistentes ao nematóide-das-galhas (Meloidogyne ssp.).

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Photon Orbital Angular Momentum and Mass in a Plasma Vortex

We analyse the Anderson-Higgs mechanism of photon mass acquisition in a plasma and study the contribution to the mass from the orbital angular momentum acquired by a beam of photons when it crosses a spatially structured charge distribution. To this end we apply Proca-Maxwell equations in a static plasma with a particular spatial distribution of free charges, notably a plasma vortex, that is able to impose orbital angular momentum (OAM) onto light. In addition to the mass acquisition of the conventional Anderson-Higgs mechanism, we find that the photon acquires an additional mass from the OAM and that this mass reduces the Proca photon mass.Comment: Four pages, no figures. Error corrections, improved notation, refined derivation

Intelligent fault diagnosis of marine equipments

The automatic and intelligent diagnosis of faults in marine equipment is a task that is considered to be of great importance considering the numerous tasks that are associated with professionals working on ships. The possibility of including automatic and intelligent processes on a ship makes it possible to monitor equipment more effectively and make more informed decisions. This approach has received a lot of attention in the academic and industrial fields as it can offer considerable economic and safety advantages. Some fault diagnosis approaches can be found in the literature, where mathematical and control theory models are taken into account. However, in complex processes not all their characteristics are always known exactly, so mathematical modelling of processes is an extremely difficult task. Fault diagnosis can therefore be based mainly on data or heuristic information. The inherent characteristics of fuzzy logic theory make it suitable for processing this type of information, which is why it will be used to model processes and diagnose faults in a marine equipment valve. The fault diagnosis architecture proposed in this paper is based on analysing the discrepancy signals obtained between the outputs of the fuzzy models and the process data under study. These discrepancies, the residuals, are indicative of equipment fault. The proposed fault diagnosis architecture uses an intelligent decision-making approach to indicate the occurrence of faults. In this paper, this architecture will be used to diagnose abrupt faults in a marine equipment valve.Peer Reviewe