Browsing Matemáticas y Física by Issue Date
Now showing items 1-20 of 132
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RADICAL EXTENSIONS AND CROSSED HOMOMORPHISMS
(2001)If Q./F is a Galois extension with Galois group G and /x(fi) denotes the group of roots of unity in Q, we use the group Z1{G,fi(Q)) of crossed homomorphisms to study radical extensions inside Q. Furthermore, we characterise ... -
Lógica difusa
(2001-05-18)El desarrollo de modelos matemáticos de sistemas reales es un tópico importante en diferentes disciplinas. Desgraciadamente la mayoría de problemas del mundo real pueden ser demasiado complejos para ser considerados un ... -
Math Processing
(2002) -
Math Processing Interferes with Directing Attention into the Right Visual Field
(2002)A supplement of the Journal of Cognitive Neuroscience 2002. -
FÓRMULAS DE TIPO-WEYL PARA DOMINIOS EXTERIORES
(2003)Se presenta un recuento histórico de comportamientos asintóticos de tipo-Weyl para dominios exteriores -
Slow decay of end effects in layered structures with an imperfect interface
(2003)An asymptotic analysis of a layered structure with an imperfect interface subject to an anti-plane shear deformation and non-homogeneous Dirichlet end conditions is presented in this paper. Two layers of isotropic materials ... -
Introducción a la teoría de grupos
(2004) -
Eigenfunction expansions and spectral projections for isotropic elasticity outside an obstacle
(2004)We consider the operator ??? grad div acting on an exterior domain ? in Rn (with? >0 and n = 2, 3) subject to Dirichlet boundary conditions. The spectral resolution for the operator is written in terms of an expansion of ... -
PROPAGATION OF ELASTIC WAVES ALONG INTERFACES IN LAYERED BEAMS
(2004)An asymptotic model is proposed for the analysis of a long-wave dynamic model for a layered structure with an imperfect interface. Two layers of isotropic material are connected by a thin and soft adhesive: effectively the ... -
Attentional deficits in concussion
(2005)Primary objective: The purpose of the present study was to examine deficits in the alerting, orienting and executive components of attention in individuals who have recently suffered a concussion. Research design: A group ... -
FRACCIONES PARCIALES: ELEMENTOS PARA UNA DISCUSIÓN EN EL AULA
(2005)Estudios recientes sugieren que las propuestas curriculares para los diferentes niveles básicos de instrucción se elaboren tomando en cuenta una presentación estructurada ascendente de los temas a discutir. Así mismo, se ... -
Modelos matemáticos compartamentales
(2005-07)In this work, the scheme to model the interaction between a closed population divided in two classes is presented. In particular, it is of interest to evaluate the behaviour of an epidemic disease in a very simple way -
THE C*-ALGEBRAS ASSOCIATED TO TIME-t AUTOMORPHISMS OF MAPPING TORI
(2006)We find the range of a trace on the K0 group of a crossed product by a time-t automorphism of a mapping torus. We also find a formula to compute the Voiculescu-Brown entropy for such an automorphism. By specializing to the ... -
Tracking the recovery of visuospatial attention deficits in mild traumatic brain injury
(2006)The goal of the current investigation was to probe the deficits in the alerting, orienting and executive components of visuospatial attention in individuals who have recently suffered a mild traumatic brain injury (mTBI) ... -
WAYS OF REASONING AND TYPES OF PROOFS THAT MATHEMATICS TEACHERS SHOW IN TECHNOLOGY-ENHANCED INSTRUCTION
(2006)In this report we document and analyze the ways of reasoning and types of proofs employed by high school mathematics teachers to validate conjectures and to justify procedures in order to solve problems, which emerge when ... -
Las Matemáticas en la vida diaria
(2006)Si las matemáticas son tan útiles como dicen algunos, ¿porque en mis cursos no lo veo? ´ Un estudiante de preparatoria La Naturaleza está escrita en lenguaje matemático , Galileo Galilei (1564-1642) -
Eigenvalues, K-theory and Minimal Flows
(2007)Let (Y, T) be a minimal suspension flow built over a dynamical system (X, S) and with (strictly positive, continuous) ceiling function f : X ! R. We show that the eigenvalues of (Y, T) are contained in the range of a trace ... -
HIGH SCHOOL TEACHERS COGNITIVE SCHEMES SHOWN IN PROBLEM SOLVING APPROACHES BASED ON THE USE OF TECHNOLOGY
(2007)This study documents the type of proof schemes that high school teachers developed and used in problem solving scenarios that involve the use of dynamic software (Cabri-Geometry). Research questions that helped organize ...