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Mathematical practical sessions with manipulatives: Trainee teachers’ perceptions of their utility
(Education Association of South Africa, 2019)
This study presents the perceptions of trainee teachers regarding the realisation of practical mathematical sessions to expand on the concepts that are taught in primary education using manipulatives. For a 4-month period, ...
Revistas brasileñas de Educación en SCOPUS: un análisis bibliométrico
(Pitt Open Library Publishing, 2017)
Objetivo. El auge de la producción científica en los últimos años ha motivado la realización de diversos estudios bibliométricos. En esta línea, este trabajo analiza las revistas brasileñas presentes en el índice de impacto ...
Questioning the Shanghai Ranking methodology as a tool for the evaluation of universities: An integrative review
(Springer, 2018)
This integrative review reports on methodological questions about the Shanghai Ranking
as a tool for the evaluation of universities, questions that are extensible to other rankings.
The paper presents a list of methodological ...
Stability of maximal hypersurfaces in spacetimes: new general conditions and application to relevant spacetimes
(Springer, 2017)
We obtain new simple sufficient conditions to ensure the stability and strong stability of maximal hypersurfaces (without boundary) immersed in an arbitrary spacetime. Several applications to maximal hypersurfaces in a ...
Infinitesimal relative position vector fields for observers in a reference frame and applications to conformally stationary spacetimes
(Springer, 2019)
We introduce and analyze the concept of infinitesimal relative position vector field between “infinitesimally nearby” observers, showing the equivalence between different definitions. Through the Fermi–Walker derivative ...
Galilean Generalized Robertson-Walker spacetimes: a new family of Galilean geometrical models
(American Institute of Physics, 2018)
We introduce a new family of Galilean spacetimes, the Galilean generalized Robertson-Walker spacetimes. This new family is relevant in the context of a generalized Newton-Cartan theory. We study its geometrical structure ...