Results 21 to 30 of about 3,123 (66)
Global Change Biology, Volume 32, Issue 7, July 2026.Based on a global analysis of 1921 soil samples, we show that agricultural management acts as a powerful ecological filter reshaping microbial communities. Land use and inputs—pesticides and fertilizers—drive a functional shift toward opportunistic pathogens and fragmented, less connected microbial networks, potentially compromising soil ecosystem ...
Zaki Saati‐Santamaría +88 more
wiley +1 more source
Geometric interpretation of the signs of trigonometric ratios with Geogebra
Amazônia, 2017 The teaching of Trigonometry has been characterized by an algebraic approach, which has made its study a memoristic and a mechanical process. A content where the previous can be evidenced is the signs of the trigonometric ratios, which tend to be treated
Stephanie Chiquinquirá Díaz Urdaneta +2 more
doaj +1 more source
Non‐Stationary Dry‐Spell Hazard Probabilities for Spain
International Journal of Climatology, Volume 46, Issue 8, 30 June 2026.This study assesses long‐term changes in dry‐spell hazard probabilities across Spain (1961–2024) using a novel non‐stationary extreme value framework applied to daily precipitation records from a dense observational network. Results show that dry‐spell duration and associated return levels are dominantly stationary, with non‐stationary models providing
S. M. Vicente‐Serrano +13 more
wiley +1 more source
Radioterapia y el papel del sistema inmunitario
Nova Scientia, 2014 Se simuló computacionalmente un gran número de pacientes bajo tratamiento de radioterapia, mediante un sistema dinámico. De los resultados, se halló un método para cambiar el número de sesiones de radiación manteniendo óptimo el tratamiento.
Oscar Sotolongo Grau +4 more
doaj +1 more source
Randomized Hypergraph States and Their Entanglement Properties
Annalen der Physik, Volume 538, Issue 1, January 2026.Randomized hypergraph (RH) states are mixed states that extend the concept of randomized graph states to multi‐qubit hypergraphs subject to probabilistic gate imperfections. By modeling noisy multi‐qubit operations, this work reveals nonmonotonic behavior in bipartite and multipartite entanglement, derives analytical witnesses for specific hypergraph ...
Vinícius Salem +2 more
wiley +1 more source
Revista Venezolana de Investigación en Educación Matemática, 2021 Este artículo reporta reflexiones emanadas de tres conferencias vinculadas al Dominio Afectivo en Educación Matemática, efectuadas en el seminario de Formación de Investigadores en Temas Contemporáneos de la Educación Matemática (FITCEM), organizado por ...
Oswaldo J. Martínez-Padrón +2 more
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Mixed‐Condorcet: An Advanced Method of Clustering for Mixed Data in Social Sciences
Computational and Mathematical Methods, Volume 2026, Issue 1, 2026.This paper provides a new clustering method for mixed data based on α‐Condorcet, denoted mixed‐Condorcet, by introducing a new Condorcet criterion. This criterion combines α‐Condorcet and k‐prototype criteria. Next, we give the within‐cluster sum‐of‐squares expression for our new method.
Marcela Romero-Jeldres +4 more
wiley +1 more source
ELEMENTOS HISTÓRICOS PARA LA ENSEÑANZA DE LA FUNCIÓN LOGARÍTMICA EN LA EDUCACIÓN BÁSICA
Revista Brasileira de História da Matemática, 2020 Con esta investigación se pretende brindar algunos elementos desde la perspectiva de la Historia de las Matemáticas, al mejoramiento de la enseñanza de la función logarítmica en los grados 8° y 9° de la Educación Básica.
Natalia Escobar Villota
doaj +1 more source
ChemistryOpen, Volume 14, Issue 12, December 2025.Carbon‐supported rhenium catalysts with metallic, carbide, and oxide phases were evaluated for vapor‐phase formic acid decomposition. Rhenium carbide exhibited the highest intrinsic activity and superior CO2 selectivity, while graphite provided enhanced dispersion compared to carbon nanotubes, highlighting phase‐dependent performance in hydrogen ...
Claudio Contreras‐Díaz +7 more
wiley +1 more source
Sustainable Development, Volume 33, Issue 6, Page 8057-8071, December 2025.ABSTRACT This study validates the Knowledge, Attitude, and Behavior (KAB) Questionnaire, a comprehensive tool designed to evaluate sustainability‐related knowledge, attitudes, and behaviors among pre‐service primary school teachers, with a specific alignment to five key Sustainable Development Goals (SDGs). The questionnaire, comprising 39 items across
Jorge Crespo‐Martín +2 more
wiley +1 more source