Results 21 to 30 of about 3,269 (139)

El matemático como un profesional en los recorridos de estudio e investigación

Arbor: Ciencia, Pensamiento y Cultura, 2011
En este trabajo se describe un nuevo dispositivo didáctico que estamos diseñando y completando, los Recorridos de Estudio e Investigación (REI), que quieren contribuir a crear secuencias de enseñanza-aprendizaje.
C. Fonseca, J. M. Casas, M. A. Insua
doaj   +1 more source

One century of teaching, research, and innovation in chemical engineering in Mexico: The role of chemical engineering in the background and future of polymer science and industrial production in Mexico

The Canadian Journal of Chemical Engineering, EarlyView.
Timeline of key academic milestones and individuals that shaped chemical engineering at FQ‐UNAM and in Mexico. Abstract One hundred years after the beginning of the teaching of Chemical Engineering in Mexico, which started in 1925 in the former National School of Chemical Sciences, currently Faculty of Chemistry (FQ) at National Autonomous University ...
Patricia Pérez‐Salinas, Alberto Rosas‐Aburto, Eduardo Vivaldo‐Lima   +2 more
wiley   +1 more source

The Exponential Versus the Complex Power e^z Function Revisited

Mathematics
The complex exponential function exp is a well-known entire function. In this paper, we recall its relation with the definition of the complex power of a complex number, which emanates that the complex power ez may coincide with it at some complex values.
Luis M. Sánchez-Ruiz, Matilde Legua, Santiago Moll-López, José A. Moraño-Fernández, María-Dolores Roselló   +4 more
doaj   +1 more source

Stable adaptive training for physics-informed neural networks in acoustic wave propagation [PDF]

JASA Express Letters
Physics-informed neural networks (PINNs) have emerged as a promising tool for simulating various phenomena. However, their application in underwater acoustics remains challenging, primarily due to the need to sample large computational domains and to ...
Márcio Marques, Leonardo Mendonça, Arthur Bizzi, Leonardo Moreira, Christian Oliveira, Deborah Oliveira, Lucas Fernandez, Vitor Balestro, João Pereira, Daniel Yukimura, Tiago Novello, Pavel Petrov, Lucas Nissenbaum   +12 more
doaj   +1 more source

Generalized Chemical Model for Warm Dense Hydrogen: Ionization Potential Depression and Molecular Dissociation Shifts

Contributions to Plasma Physics, EarlyView.
ABSTRACT Warm dense matter (WDM) is a complex state, where quantum effects, thermal excitations, and strong interparticle correlations coexist. Understanding its microscopic composition and medium‐induced modifications of atomic and molecular properties is essential for planetary modeling, fusion research, and high‐energy‐density experiments.
L. T. Yerimbetova, Yu. V. Arkhipov, Ye. S. Mukhametkarimov, A. E. Davletov, I. M. Tkachenko   +4 more
wiley   +1 more source

frontiermetrics: An R Package for Characterizing Deforestation Frontiers

Remote Sensing in Ecology and Conservation, EarlyView.
Deforestation frontiers are major drivers of biodiversity loss, carbon emissions, and ecosystem degradation, yet our understanding of how deforestation progresses in these frontiers is limited. We present frontiermetrics, an R package to quantify a range of metrics describing the speed, severity, and spatio‐temporal patterns of forest loss. The package
Pablo Yair Huais, Ana Buchadas, Eduardo Lacerda, Javier Nori, Matthias Baumann, Tobias Kuemmerle   +5 more
wiley   +1 more source

A Family of Derivative-Free Methods with High Order of Convergence and Its Application to Nonsmooth Equations

Abstract and Applied Analysis, 2012
A family of derivative-free methods of seventh-order convergence for solving nonlinear equations is suggested. In the proposed methods, several linear combinations of divided differences are used in order to get a good estimation of the derivative of the
Alicia Cordero, José L. Hueso, Eulalia Martínez, Juan R. Torregrosa   +3 more
doaj   +1 more source

Sundman‐Like Transformations and the NRT Nonlinear Schrödinger Equation

Mathematical Methods in the Applied Sciences, Volume 49, Issue 13, Page 14791-14810, 15 September 2026.
ABSTRACT We present a new generalization of the well‐known power‐type Sundman transformation, involving not only powers of the function but also of its derivative, along with its inverse. Our aim is to explore the use of such transformations in the derivation of solutions of ordinary differential equations and in the study of their properties.
P. R. Gordoa, A. Pickering, D. Puertas‐Centeno, E. V. Toranzo   +3 more
wiley   +1 more source

Estimating Functions Inference to Semi‐Parametric Additive Models for Skewed And/Or Heavy‐Tailed Longitudinal Data

Australian &New Zealand Journal of Statistics, Volume 68, Issue 3, September 2026.
ABSTRACT In many fields of research, it is common to conduct experiments where several observations of the response variable are made on the same subject over non‐random conditions, generating longitudinal studies. A wide variety of techniques deal with this type of data when analysing population variations, many based on estimating functions.
João Victor B. de Freitas, Caio L. N. Azevedo, Juvêncio S. Nobre   +2 more
wiley   +1 more source

Estimating density limits for walking pedestrians keeping a safe interpersonal distancing

Scientific Reports, 2021
With people trying to keep a safe distance from others due to the COVID-19 outbreak, the way in which pedestrians walk has completely changed since the pandemic broke out1,2.
I. Echeverría-Huarte, A. Garcimartín, R. C. Hidalgo, C. Martín-Gómez, I. Zuriguel   +4 more
doaj   +1 more source