268 documents found, page 1 of 27
Volunteer management in sports tourism events: Motivation and satisfaction as d...
Antunes, Hélio; Rodrigues, Ana; Gouveia, Élvio; Lopes, Helder; Sabino, BebianaEffective volunteer management in sports tourism events depends on understanding motivations, segmenting profiles, and fostering satisfaction to ensure continuity and event success. The purpose of this study was to examine volunteer motivation, investigate differences in motivation based on gender and age, and identify key predictors of the intention to continue volunteering. The sample consisted of 390 partici...
Microbial fuel cells’ integration in constructed wetlands: a mini-review
Ojediran, Adetunji; Pereira, Sofia; Rosa-Santos, Paulo; Rodrigues, Ana; Calheiros, Cristina S. C.Introduction: Constructed wetlands (CWs) are sustainable wastewater treatment systems leveraging natural processes to remove pollutants. Microbial fuel cells (MFCs) enhance CWs by converting organic matter into bioelectricity via electroactive bacteria [1]. Integrating MFCs with CWs creates hybrid systems that improve treatment efficiency and generate renewable energy. The CW-MFC’s performance factors include d...
Existence of non trivial embeddings of interval exchange transformations into p...
Peres, Pedro; Rodrigues, AnaWe prove that almost every interval exchange transformation, with an associated translation surface of genus ≥2 , can be non-trivially and isometrically embedded in a family of piecewise isometries. In particular, this proves the existence of invariant curves for piecewise isometries, reminiscent of Kolmogorov–Arnold–Moser (KAM) curves for area-preserving maps, which are not unions of circle arcs or line segments.
Renormalization of translated cone exchange transformations
Cockram, Noah; Ashwin, Peter; Rodrigues, AnaIn this paper, we investigate a class of non-invertible piecewise isometries on the upper half-plane known as Translated Cone Exchanges. These maps include a simple interval exchange on a boundary we call the baseline. We provide a geometric construction for the first return map to a neighbourhood of the vertex of the middle cone for a large class of parameters, then we show a recurrence in the first return map...
Provas de Agregação em Matemática
Rodrigues, AnaRelatório e Lição de síntese
Quem inventou o zero?
Rodrigues, AnaRevista VJ n.234 página 17
Já havia tablets na Babilónia?
Rodrigues, AnaSecção Contas Comigo p19
Numeros pre-historicos
Rodrigues, AnaVisao Junior 2024-02 | Magazine article SOURCE-WORK-ID: cv-prod-id-4014137 CONTRIBUTORS: Visao Junior, n 237
Construction of invariant curves for some piecewise isometries
Rodrigues, Ana; Ashwin, Peter; Cokram, NoahWe establish conditions for the existence of a family of piecewise linear invariant curves in a two-parameter family of piecewise isometries on the upper half-plane known as Translated Cone Exchange Transformations. We show that these curves are embeddings of interval exchange transformations and give rise to layers of invariant regions. We also show the existence of a trapezoidal piecewise isometry for which t...
Como melhorar a Matemática?
Rodrigues, AnaVJ n. 233, 10-2023