Results 121 to 130 of about 35,525 (244)
Comprensión de los números complejos desde los modos de pensamiento [PDF]
, 2015 La investigación evidencia diferentes formas de pensar que estudiantes de enseñanza media (16-18 años) y superior (19 años en adelante) muestran en relación al concepto de Números Complejos, e indaga en las articulaciones entre estas distintas maneras de
Parraguez, Marcela, Randolph, Valeria
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Resonance‐induced restoration of rock permeability degraded by heavy components of crude oil
Deep Underground Science and Engineering, EarlyView.Resonance‐induced changes occur in filtration properties of sedimentary rocks in crude paraffin oil flow under acoustic vibrations. Experimental data on (a) pressure drop; (b) permeability; (c) pressure at the rock inlet; and (d) pressure at the rock outlet are presented.
Evgenii Riabokon +6 more
wiley +1 more source
Hopf algebra structures on generalized quaternion algebras
Electronic Research ArchiveIn this paper, we use elementary linear algebra methods to explore possible Hopf algebra structures within the generalized quaternion algebra. The sufficient and necessary conditions that make the generalized quaternion algebra a Hopf algebra are given ...
Quanguo Chen , Yong Deng
doaj +1 more source
Uma história da formação de professores de matemática: um exame do modelo implantado em Sergipe nos anos 1970 [PDF]
, 2016 Disponível em: http://histemat.com.br/index.php/HISTEMAT/article/view/106Qual o modelo do primeiro curso de Licenciatura de Matemática implantado em Sergipe?
Santos, Ivanete Batista
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Study on fracture parameter calibration and failure characteristics of rock with hole and crack
Deep Underground Science and Engineering, EarlyView.The SIF and plastic zone equations for a single hole and crack have been derived. The model's failure state leads to the identification of four types of cracks. The plastic zone increases with increased brittleness and decreased crack length. Abstract Cracks within the surrounding rock of roadways significantly affect their stability and failure ...
Shaochi Peng, Wensong Wang
wiley +1 more source
Review and prospects of shear test of bolted rock joints
Deep Underground Science and Engineering, EarlyView.The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren +4 more
wiley +1 more source
De la modelación concreta-dinámica al sistema matemático de signos del álgebra: lectura/transformación de textos en la resolución de ecuaciones lineales [PDF]
, 2013 Se presenta un estudio sobre la resolución de ecuaciones lineales realizado con alumnos de primero de secundaria, en el que se utiliza un modelo de la balanza en versión virtual y dinámica.
Martínez, Minerva, Rojano, Teresa
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Differentiated policy implementation in food safety and animal welfare policymaking
European Policy Analysis, EarlyView.Abstract Agri‐food policies are in the midst of far‐reaching transitions, including the transformation towards sustainable production and food consumption. The European Green Deal and Farm to Fork Strategy prioritize food safety and animal welfare issues, aiming to transform food systems towards more sustainability.
Giulia Bazzan, Colette S. Vogeler
wiley +1 more source
Energy Science &Engineering, EarlyView.This figure illustrates the optimal near‐wall treatment schemes (first‐layer height and wall function type) for solid–liquid two‐phase CFD of suspended sediment, which are correlated with particle size and flow velocity. ABSTRACT Near‐wall treatment (boundary‐layer meshing and wall functions) is a major uncertainty in solid–liquid two‐phase CFD of ...
Zichao Zhang +4 more
wiley +1 more source
Tradições modernas: reconfigurações da matemática escolar nos anos 1960 [PDF]
, 2010 Disponível em: http://www.periodicos.rc.biblioteca.unesp.br/index.php/bolema/article/view/3703Na linha dos estudos que investigam os currículos escolares como construções sociais, este artigo examina a constituição de uma tradição relativa à iniciação em
Búrigo, Elisabete Zardo
core +1 more source