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Search Results: 1 - 10 of 217589 matches for " Sandra L.; Mateus-Solarte "
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Costos Familiares de Mantener y Abandonar la Lactancia Exclusiva en el Primer Mes Posparto
Girón-Vargas,Sandra L.; Mateus-Solarte,Julio C.; Cabrera-Arana,Gustavo A.;
Revista de Salud Pública , 2009, DOI: 10.1590/S0124-00642009000300008
Abstract: objective estimating the difference between direct and indirect family costs arising from women who continue exclusive breastfeeding and those who abandon it during the first postpartum month. methods a cost analysis was carried out on primiparous women from cali, colombia; they were recruited during their immediate puerpery and follow-up during the first 30 postpartum days. non-parametric bootstrap techniques were used for estimating average costs and differences for 0-8, 9-30 and 0-30 postpartum days regarding women who abandoned exclusive breastfeeding and those who did not. results women who abandoned exclusive breastfeeding assumed higher costs related to baby feeding while those who continued exclusive breastfeeding had higher food costs for the mother and in contracting domestic support. conclusion the savings which a woman and her family can make due to continuing with exclusive breastfeeding become negated by the mother's food-related costs. interventions should be designed which are orientated towards prolonging exclusive breastfeeding and modifying beliefs about nutrition which contribute towards generating economic consequences for families.
Ecology and policy for exclusive breastfeeding in Colombia: a proposal
Mateus Solarte, Julio César
Colombia Médica , 2012,
Abstract: Introduction: Breastfeeding promotion is one of the most important strategies against infant mortality and to control child undernourishment. Despite policies and plans to promote and protect breastfeeding in Colombia, its practice is low and its duration is short.Objective: To propose an ecology framework to interpret and incorporate contextual, interpersonal, and individual factors associated with the practice of breastfeeding and duration. Thereby, the plans and policies addressed to promote and protect breastfeeding in Colombia could be reinforced.Conclusions: To implement an ecology framework for Breastfeeding in Colombia, it is necessary to identify the effect of contextual factors in the biggest cultural regions of Colombia, to recognize the limitations of Infant-Friendly Hospital Initiatives to improve exclusive breastfeeding duration, to execute prospective studies in order to identify factors associated with breastfeeding duration, to design and implement plans and policies based on comprehensive planning strategies of healthcare interventions, to develop appropriate and cost-effective extra-institutional strategies aimed at prolonging the duration of breastfeeding, and to implement more reliable breastfeeding surveillance systems.
Futuros prováveis: um olhar sociológico sobre os projectos de futuro no 9.o ano
Mateus,Sandra;
Sociologia, Problemas e Práticas , 2002,
Abstract: this article analyses the scholastic and vocational options that lie behind 9th grade students? plans for the future. it sees these plans as emerging from a field of possibilities in which elements such as socio-economic resources, schools and sociability networks form a specific, dynamic and determinant framework, the study of which makes it possible to go beyond the individual and free-choice perspective that is generically attributed to choices of both options at school and plans for the future. observation of these aspects, particularly those that most directly concern school, leads to the construction of a typology with which to interpret the plans identified in the study.
Cuadrilaterización de una malla triangular usando análisis espectral y teoría de Morse
Mateus,Sandra;
Revista Ingenierías Universidad de Medellín , 2008,
Abstract: reparametrization of triangular nets is one of the basic processes used by almost all geometric processing systems. most works have been focused on the triangular netting. a problem which is also important about triangled surface reparametrization in quadrilaterals has gone adrift for a long time. in spite of a relative lack of attention, a need for quality quadrilateral reparametrization methods is extremely important in several areas such as graphic computation and computer visualization. this article shows an approach to the triangle net quadrilateraliization issue. by applying morse theory to laplace?s net own values, a logarithm which quadrilateralizes triangular surfaces is implemented. due to the properties of laplace?s operator, resulting quadrilateral patches are appropriately formed and directly lifted from intrinsic properties of the surface.
Cuadrilaterización de una malla triangular usando análisis espectral y teoría de Morse Quadrilateralization of a triangular net using spectral analysis and Morse theory
Sandra Mateus
Revista Ingenierías Universidad de Medellín , 2008,
Abstract: La reparametrización de las mallas triangulares es uno de los procesos fundamentales usados por casi todos los sistemas de procesamiento geométrico. La mayoría de trabajos se han enfocado en el remallado triangular; el problema igualmente importante de la reparametrización de superficies trianguladas en cuadriláteros ha permanecido por mucho tiempo sin dirección. A pesar de la falta relativa de atención, la necesidad de métodos de reparametrización cuadrilaterales de calidad es de gran importancia en varias áreas de computación gráfica y visión por computador. En este artículo se muestra un acercamiento al problema de cuadrilaterización de mallas triangulares. Aplicando un análisis de la teoría de Morse a los valores propios de una malla laplaciana, se implementa un algoritmo que cuadrilateriza superficies triangulares. Debido a las propiedades del operador laplaciano, los parches cuadrilaterales resultantes se forman adecuadamente y se levantan directamente de las propiedades intrínsecas de la superficie. Reparametrization of triangular nets is one of the basic processes used by almost all geometric processing systems. Most works have been focused on the triangular netting. A problem which is also important about triangled surface reparametrization in quadrilaterals has gone adrift for a long time. In spite of a relative lack of attention, a need for quality quadrilateral reparametrization methods is extremely important in several areas such as graphic computation and computer visualization. This article shows an approach to the trIangle net quadrilateraliization issue. By applying Morse theory to Laplace’s net own values, a logarithm which quadrilateralizes triangular surfaces is implemented. Due to the properties of Laplace’s operator, resulting quadrilateral patches are appropriately formed and directly lifted from intrinsic properties of the surface.
EFECTO DEL GRADIENTE ALTITUDINAL SOBRE ASPECTOS AUTOECOLóGICOS DE ESPELETIA PYCNOPHYLLA ssp. ANGELENSIS CUATREC. (ASTERACEAE) EN EL PáRAMO EL INFIERNILLO (NARI?O-COLOMBIA)
Benavides-Martínez,Iván F.; Burbano-Martínez,Diana L.; Urbano-Apráez,Sandra M.; Solarte-Cruz,María E.;
Actualidades Biológicas , 2007,
Abstract: some autoecological features of espeletia pycnophylla ssp. angelensis cuatrec. such as its demographic structure, population density, spatial pattern of dispersion, production of reproductive structures, adult morphometry and survivorship, were studied in an altitudinal gradient on a dry paramo of nari?o (colombia). hypothesis proposed by other authors about a linear effect caused by the elevation on these variables were completely rejected. the elevation induces an ecoclinal effect on population density, and this density correlates negatively with both production of reproductive structures and adult sizes. these results elucidate an unequivocal effect of density-dependence phenomena on population fitness. the intermediate zone of the altitudinal gradient exhibits a high population density, but on the other hand show reduced corporal adult sizes, minimal production of reproductive structures and the probability of juveniles reaching advanced ages is low. evidently, this intermediate elevation can have favorable ecological conditions for the seedling establishment, wich increments population densities at long term. we propose that other author's generalizations about the influence of elevation on the autoecology of these plants are limited, because the particular life and disturbance stories of paramos and the spatial, ecological and genetic isolating are explicative factors impossible to take away from the context. the demographic structure of the population fitted the logarithmic model, revealing its early regeneration state from the last fire event on 2003 and the similarity of the survivorship curves among every elevation, probed a high demographic stability.
EFECTO DEL GRADIENTE ALTITUDINAL SOBRE ASPECTOS AUTOECOLóGICOS DE ESPELETIA PYCNOPHYLLA ssp. ANGELENSIS CUATREC. (ASTERACEAE) EN EL PáRAMO EL INFIERNILLO (NARI O-COLOMBIA) THE EFFECT OF THE ALTITUDINAL GRADIENT ON AUTOECOLOGICAL FEATURES OF ESPELETIA PYCNOPHYLLA ssp. ANGELENSIS CUATREC. (ASTERACEAE) IN THE PARAMO 'EL INFIERNILLO' (NARI O-COLOMBIA)
Iván F. Benavides-Martínez,Diana L. Burbano-Martínez,Sandra M. Urbano-Apráez,María E. Solarte-Cruz
Actualidades Biológicas , 2007,
Abstract: Se estudió el efecto de la elevación sobre algunos aspectos autoecológicos de la especie Espeletia pycnophylla ssp. angelensis Cuatrec. (Asteraceae), tales como su estructura demográfica, densidad poblacional, patrón de distribución espacial, producción de estructuras reproductivas, morfometría de adultos y supervivencia, en un páramo seco del departamento de Nari o (Colombia). Las hipótesis propuestas por otros autores acerca del efecto lineal que la elevación produce sobre estas variables, fueron completamente rechazadas. La elevación induce un efecto coenoclínico sobre la densidad poblacional y ésta a su vez, se correlaciona negativamente con la producción de estructuras reproductivas y el tama o de los adultos, evidenciándose un efecto inequívoco del fenómeno de la densodependencia sobre el potencial biótico de la población. En la zona intermedia del gradiente, la densidad poblacional es máxima, pero los tama os corporales son reducidos, la producción de estructuras reproductivas es mínima y la probabilidad de que un juvenil alcance edades avanzadas es baja. Evidentemente, esta elevación intermedia estaría presentando condiciones ecológicas favorables para el establecimiento y supervivencia de plántulas, lo que a largo plazo conlleva a un aumento de la densidad poblacional. Se propone que las generalizaciones de otros autores acerca de la influencia de la elevación sobre la autoecología de estas plantas son inverosímiles y limitadas, ya que la historia particular de vida y disturbio del páramo y los aislamientos espaciales, ecológicos y genéticos, son factores explicativos que no pueden aislarse del contexto. Paralelamente, la población se ajustó al modelo demográfico logarítmico, revelando su temprano estado de regeneración frente a la última quema ocurrida en el 2003, y la similitud de las curvas de supervivencia entre todas las elevaciones, probó una alta estabilidad demográfica. Some autoecological features of Espeletia pycnophylla ssp. angelensis Cuatrec. such as its demographic structure, population density, spatial pattern of dispersion, production of reproductive structures, adult morphometry and survivorship, were studied in an altitudinal gradient on a dry paramo of Nari o (Colombia). Hypothesis proposed by other authors about a linear effect caused by the elevation on these variables were completely rejected. The elevation induces an ecoclinal effect on population density, and this density correlates negatively with both production of reproductive structures and adult sizes. These results elucidate an unequivocal effect of density-dependen
Método de Regularización de Mallas Cuadrilaterales en Reconstrucción de Objetos 3D
Mateus,Sandra P;
Información tecnológica , 2008, DOI: 10.4067/S0718-07642008000400012
Abstract: a regularization method of a quadrilateral mesh by means geodesics and b-splines, applied to 3d objects reconstruction, is proposed. the procedure can be summarized in three main steps: i) selection of quadrilaterals; ii) regularization of quadrilaterals and generation of points using b-splines; and iii) matching regularized points by means of fast marching method geodesic (fmm). in the process of experimentation, the regularization of the representation of the quadrilateral mesh and the representation of the computational models were done with a range image of the cultural object moai. despite having an irregular arbitrary topology, the proposed method gave adequate results in the conservation of the fine detail of the object.
Una Técnica de Inteligencia Artificial para el Ajuste de uno de los Elementos que Definen una B-Spline Racional No Uniforme (NURBS)
Mateus,Sandra P;
Información tecnológica , 2010, DOI: 10.4067/S0718-07642010000600004
Abstract: in the existing techniques of artificial intelligence, two artificial neural networks (ann) were selected and adapted to fit one of the elements that define a non-uniform rational b-spline (nurbs) and thus obtaining an appropriate modeling of the nurbs. the selected elements were the checkpoints. the ann used were the radial basis function and the kohonen model or self-organizing maps. based on the analysis of the results and characterization of the ann the radial basis function had a more appropriate and optimum performance for a large number of data, which is a disadvantage of the self-organizing maps. in this model, additional processes must be done to determine the winning neuron and the weights must be refitted.
Trajectórias escolares, propriedades sociais e origens nacionais : descendentes de imigrantes no ensino básico português
Teresa Seabra,Sandra Mateus
Revista da Faculdade de Letras : Sociologia , 2010,
Abstract: This paper analyses the school pathways of immigrants’ children and their native classmates in lower secondary education. It covers variables such as the place of birth and nationality of the children and their parents, the parents’ social class and schooling, academic experience and aspirations and expectations in school. The results indicate that national origin, after controlling the effect of the socio-demographic variables, has little impact on the students’ school pathways and that the parents’ academic qualifications and the students’ sex are more relevant
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