Search results for "Variable"

Estudio de la eficacia escolar en centros educativos de primaria mediante el uso de Modelos Jerárquicos Lineales

2021

espanolINTRODUCCION. Se presenta un estudio censal sobre la eficacia escolar en los centros educativos de primaria de la comunidad autonoma de La Rioja, un analisis secundario de una evaluacion diagnostica (ED) previa en esa comunidad. Se valoro el impacto de variables contextuales en los rendimientos de las asignaturas evaluadas no usando las puntuaciones medias brutas obtenidas en la ED, sino las puntuaciones medias ajustadas una vez controlado el efecto de variables contextuales. METODO. El control se realizo por modelizacion estadistica multinivel con modelos jerarquicos lineales en dos niveles: estudiantes y centros. Los residuos de los modelos se usaron como criterio de eficacia escol…

THE DEVELOPMENT OF ADOLESCENTS’ SELF-CONCEPT OF ABILITY THROUGH GRADES 7-9 AND THE ROLE OF PARENTAL BELIEFS

2016

This study examined the development of adolescents’ self-concept of ability in mathematics and literacy during secondary school, and the role that mothers’ and fathers’ beliefs concerning their child’s abilities play in this development. Also examined was whether the role of mothers’ and fathers’ beliefs about their adolescent child’s ability in mathematics and literacy differs according to the adolescent’s gender and level of performance. A total of 231 adolescents and their mothers and fathers were followed up across secondary school. The results showed, first, that adolescents’ self-concept of ability declined slightly from grade 7 to grade 9 in both mathematics and literacy. Second, mot…

Disposição ao pensamento crítico, nível acadêmico, gênero e resolução de problemas no ensino médio

2021

Resumen El propósito de este estudio fue investigar la posible influencia de la disposición hacia el pensamiento crítico, el nivel académico y el género (variables independientes) sobre el desempeño en resolución de problemas de estudiantes de secundaria (variable dependiente). Han participado 114 estudiantes de educación secundaria españoles, 55 chicos y 59 chicas, de 3º y 4º de ESO y de 1º de Bachillerato (9º, 10º y 11º grado, respectivamente). A todos ellos se les ha administrado un cuestionario sobre disposición hacia el pensamiento crítico y una prueba de resolución de problemas (un problema de las pruebas PISA). De la matriz de correlaciones producto-momento de Pearson entre variables…

Quantum Hopfield Model

2020

We find the free-energy in the thermodynamic limit of a one-dimensional XY model associated to a system of N qubits. The coupling among the &sigma

The effects of self‐efficacy, hope, and engagement on the academic achievement of secondary education in the Dominican Republic

2019

Split extensions, semidirect product and holomorph of categorical groups

2006

Working in the context of categorical groups, we show that the semidirect product provides a biequivalence between actions and points. From this biequivalence, we deduce a two-dimensional classification of split extensions of categorical groups, as well as the universal property of the holomorph of a categorical group. We also discuss the link between the holomorph and inner autoequivalences.

An immunohistochemical study of the distribution of p 16 protein in oral mucosa in smokers, non-smokers and in frictional keratosis

2009

Objective: Our study aimed to characterize alteration in the immunohistochemical p16 expression in normal oral mucosa and non-neoplastic hyperproliferative disorders (i.e. frictional keratosis and mucosa from smokers). Study design: 43 specimen of oral mucosa were examined using immunohistochemistry. Results: In normal mucosa, there was strong positive nuclear staining in a proportion of fibroblasts and endothelial cells in the lamina propria, with variable expression in nuclei of the epithelial layer. However, when the patient?s tobacco smoking was examined, p16 nuclear staining in oral epithelium was seen in 4/20 (20%) of smokers and 0/23 (0%) of non-smokers. In every case of frictional k…

A Perspective on Aging in Rotifers

1980

Most research on aging in rotifers has been performed with populations, not with individuals. As a consequence, the dependent variable in these studies is usually either mean lifespan or rate of survivorship. After a brief consideration of the literature published since the last major review (King, 1969), the results of a series of experiments are presented. Males and females of three genetically distinct clones of Brachionus plicatilis were used for a factorial life table analysis at three different temperatures. The results of these experiments indicate several potential problems in using populations to study the aging process of individuals. These problems derive from the fact that lifes…

Deconvolution filtering for nonlinear stochastic systems with randomly occurring sensor delays via probability-dependent method

2013

This paper deals with a robustH∞deconvolution filtering problem for discrete-time nonlinear stochastic systems with randomly occurring sensor delays. The delayed measurements are assumed to occur in a random way characterized by a random variable sequence following the Bernoulli distribution with time-varying probability. The purpose is to design anH∞deconvolution filter such that, for all the admissible randomly occurring sensor delays, nonlinear disturbances, and external noises, the input signal distorted by the transmission channel could be recovered to a specified extent. By utilizing the constructed Lyapunov functional relying on the time-varying probability parameters, the desired su…

The space H(Ω,(zj)) of holomorphic functions

2008

Abstract Let Ω be a domain in C n . Let H ( Ω ) be the linear space over C of the holomorphic functions in Ω, endowed with the compact-open topology. Let ( z j ) be a sequence in Ω without adherent points in Ω. In this paper, we define the space H ( Ω , ( z j ) ) and some of its linear topological properties are studied. We also show that, for some domains of holomorphy Ω and some sequences ( z j ) , the non-zero elements of H ( Ω , ( z j ) ) cannot be extended holomorphically outside Ω. As a consequence, we obtain some characterizations of the domains of holomorphy in C n .