6,118 research outputs found
Towards the understanding of vertical-axis wind turbines in double-rotor configuration
Vertical-axis wind turbines (VAWTs) in double-rotor configuration, meaning two rotors in close proximity, have the ability to enhance the power performance. In this study, we work towards the understanding of vertical-axis wind turbines in double-rotor configuration. Numerical simulations are performed to gain insight in the physics behind the double-rotor concept. Furthermore, a parametric study is performed to explore the effect of the double-rotor lay-out, rotor loading, rotor spacing and wind direction on the flow characteristics and the power generation.</p
Determinants of ageism against older adults: a systematic review
Ageism is a widespread phenomenon and constitutes a significant threat to older peopleâs
well-being. Identifying the factors contributing to ageism is critical to inform policies that minimise its
societal impact. In this systematic review, we gathered and summarised empirical studies exploring
the key determinants of ageism against older people for a period of over forty years (1970â2017).
A comprehensive search using fourteen databases identified all published records related to the
umbrella concept of âageismâ. Reviewers independently screened the final pool to identify all papers
focusing on determinants, according to a predefined list of inclusion and exclusion criteria. All
relevant information was extracted and summarised following a narrative synthesis approach. A
total of 199 papers were included in this review. We identified a total of 14 determinants as robustly
associated with ageism. Of these, 13 have an effect on other-directed ageism, and one on self-directed
ageism. The quality of contact with older people and the positive or negative presentation of older
people to others emerged as the most robust determinants of other-directed ageism; self-directed
ageism is mostly determined by older adultsâ health status. Given the correlational nature of most
studies included in this review, inferences on causality should be made cautiously.info:eu-repo/semantics/publishedVersio
Prevalence of Toxoplasma gondii in Belgian wildlife
De Craeye, S., Speybroeck, N., Baert, K., Ajzenberg, D., Dardé, M.L., Collinet, F., Tavernier, P., Van Gucht, S., Dorny, P., Dierick, K
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Studies of Bs2â(5840)0 and Bs1(5830)0 mesons including the observation of the Bs2â(5840)0âB0KS0 decay in proton-proton collisions at s=8TeV.
Measurements of Bs2â(5840)0 and Bs1(5830)0 mesons are performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of , collected with the CMS detector at the LHC at a centre-of-mass energy of 8TeV . The analysis studies P-wave Bs0 meson decays into B(â)+K- and B(â)0KS0 , where the B+ and B0 mesons are identified using the decays B+âJ/ÏK+ and B0âJ/ÏKâ(892)0 . The masses of the P-wave Bs0 meson states are measured and the natural width of the Bs2â(5840)0 state is determined. The first measurement of the mass difference between the charged and neutral Bâ mesons is also presented. The Bs2â(5840)0 decay to B0KS0 is observed, together with a measurement of its branching fraction relative to the Bs2â(5840)0âB+K- decay
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Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton-proton collisions at s=13 TeV.
A search for new phenomena is performed using events with jets and significant transverse momentum imbalance, as inferred through the MT2 variable. The results are based on a sample of proton-proton collisions collected in 2016 at a center-of-mass energy of 13 TeV with the CMS detector and corresponding to an integrated luminosity of 35.9 fb-1 . No excess event yield is observed above the predicted standard model background, and the results are interpreted as exclusion limits at 95% confidence level on the masses of predicted particles in a variety of simplified models of R-parity conserving supersymmetry. Depending on the details of the model, 95% confidence level lower limits on the gluino (light-flavor squark) masses are placed up to 2025 (1550) GeV . Mass limits as high as 1070 (1175) GeV are set on the masses of top (bottom) squarks. Information is provided to enable re-interpretation of these results, including model-independent limits on the number of non-standard model events for a set of simplified, inclusive search regions
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