Buscar
Mostrando ítems 41-50 de 151
Developing Number Sense: An Approach to Initiate Algebraic Thinking in Primary Education
(MDPI, 2021)
Traditionally, the teaching and learning of algebra has been addressed at the beginning of secondary education with a methodological approach that broke traumatically into a mathematical universe until now represented by ...
Effective Teacher Professional Development Programs. A Case Study Focusing on the Development of Mathematical Modeling Skills
(MDPI, 2021)
A concern in Mathematics Education is the professional development of the teacher and to promote effective training programs. The literature provides principles guiding the design of such programs, which were considered ...
A Tool for the Analysis and Characterization of School Mathematical Models
(MDPI, 2021)
This paper shows a tool for the analysis of written productions that allows for the characterization of the mathematical models that students develop when solving modeling tasks. For this purpose, different conceptualizations ...
Development of Calibration Models to Predict Mean Fibre Diameter in Llama (Lama glama) Fleeces with Near Infrared Spectroscopy
(MDPI, 2021)
Llama fibre has the potential to become the most valuable textile resource in the Puna region of Argentina. In this study near infrared reflectance spectroscopy was evaluated to predict the mean fibre diameter in llama ...
Calabi-Bernstein type problems in Lorentzian Geometry
(Springer, 2017)
The study of maximal hypersurfaces in Lorentzian manifolds is an interesting mathematical problem, which connects di_erential geometry, nonlinear partial di_erential equations and certain problems in mathematical relativity. ...
Relativistic particles with torsion in three-dimensional non-vacuum spacetimes
(American Institute of Physics, 2021)
In this paper, we analyze trajectories of spacelike curves that are critical points of a Lagrangian depending on its total torsion. We focus on two important families of spacetimes, generalized Robertson–Walker and standard ...
Stable Minimal Surfaces in Riemannian Warped Products
(Springer, 2017)
We obtain several stability results forminimal two-sided surfaces immersed in a wide class of 3-dimensional Riemannian warped products, which includes the class of Riemannian products. As a consequence, some Bernstein-type ...
An analytical approach to the external force-free motion of pendulums on surfaces of constant curvature
(Elsevier, 2018)
The dynamics of external force free motion of pendulums on surfaces of constant Gaussian curvature is addressed when the pivot moves along a geodesic obtaining the Lagrangian of the system. As an application it is possible ...
Spacelike hypersurfaces with functionally bounded mean curvature in Lorentzian warped products and generalized Calabi-Bernstein type problems
(Cambridge University Press, 2019)
We study spacelike hypersurfaces with functionally bounded mean curvature in Lorentzian warped products M = I × f F , where F is a (non-compact) complete Riemannian mani- fold whose universal covering is parabolic. In ...
Compact maximal hypersurfaces in globally hyperbolic spacetimes
(IOP Publishing, 2018)
Several uniqueness results on compact maximal hypersurfaces in a wide class of globally hyperbolic spacetimes are provided. They are obtained from the study of a distinguished function on the maximal hypersurface and under ...