Exact thermodynamics of a planar array of Ginzburg-Landau chains with nn and nnn interactions

The exact expression of the free energy of a planar array of a Ginzburg-Landau chains with nn and nnn interaction is obtained. The critical behaviour of the specific heat is not qualitatively modified by taking into account the nnn interaction

Estudio comparativo entre el proyecto educativo del programa (PEP) de Licenciatura en Informática de la Universidad de Nariño y proyectos educativos de otros programas de licenciatura afines en universidades públicas a nivel nacional.

La investigación compara las propuestas educativas que estas universidades presentan en esta área de estudio, desde los componentes fundamentales que conforman el programa y que están escritos en los documentos legales que debe tener cada una. Se busca similitudes, diferencias, ventajas, desventajas, etc., en aras de alcanzar la mejora de la calidad educativa ofrecida para los profesionales en este campo. Para tal fin, se utilizó el método comparativo de Hilker y Bereday (1972), organizado en cuatro fases: descripción, interpretación, yuxtaposición y comparación que dio lugar a dos tipos de resultados: los componentes coincidentes entre los programas, y por tanto las oportunidades de transferencias, traslados e intercambios que se abren; y los componentes que se diferencian, lo que causa que algunos programas tengan desventajas a la hora de ofrecerlos a la comunidad, pero a la vez abre la oportunidad de mejora en la calidad de su propuesta, inherente a la cultura de autoevaluación que cada uno debe tener

Study of Conflicts in Games Played during Primary School physical Education Classes

Este estudio investigó los conflictos motores (CM) surgidos en los juegos realizados en clases de educación física en un centro de educación primaria. Se examinaron los conflictos que se originaron en cuatro clases de juegos (psicomotores, cooperación, oposición y cooperación-oposición). Se trata de un estudio de caso único ramificado multisujeto (n = 43 estudiantes, 21 niños y 22 niñas, de entre 8 y 11 años de edad). El profesor compartió el rol de investigador participante y de docente. Se aplicaron 255 juegos que originaron 747 CM. El análisis estadístico inferencial (modelo de regresión logística univariable y multivariable) permitió investigar el origen, la respuesta y su relación en los diferentes CM. El estudio ha confirmado el alto nivel conflictivo del alumnado También se ha observado que los CM están directamente relacionados con la familia de juegos motores en las que emergenThis study investigated the types of motor conflict arising in four kinds of games (psychomotor, cooperation, opposition and cooperation-opposition) played in the context of primary school physical education classes. This was a multi-subject, single-case study (n = 43 students, 21 boys and 22 girls aged between 8 and 11 years). The class teacher had a dual role as participant researcher and educator. A total of 255 games were studied, in which 747 motor conflicts arose. An inferential statistical analysis (univariate and multivariate logistic regression) was used to investigate the origin of and response to each motor conflict, as well as the relationship between these two aspects. The results revealed high levels of conflict among these students. The different types of conflict were also found to be related to the family of motor games in which they aros

Procesamiento De Imágenes Para La Identificación De Personas Como Sistema De Seguridad En Zonas Domiciliarias/Image Processing for identification of people as a security system in domiciliary zones

El objetivo fue la implementación de dos algoritmos de reconocimiento facial para la identificación de personas, bajo condiciones reales en este caso un domicilio, se examinó las investigaciones relevantes en la identificación facial como los métodos de Análisis de Componentes Principales (PCA) y el Análisis Lineal Discriminante (LDA), procesos matemáticos utilizadas por los algoritmos Eigenfaces y Fisherfaces, que son técnicas de aproximación estadística para clasificar datos en este caso rostros, con mínima complejidad computacional. El sistema de identificación de personas propuesto, desarrolló algoritmos en Matlab, describiendo sus etapas principales de procesamiento como la adquisición de imágenes, pre procesamiento, extracción de características faciales, entrenamiento o clasificador, éstos algoritmos se sometieron a evaluación de eficacia en la identificación de personas, utilizando una base de rostros públicas de AT&T conocida como ORL Database of Faces, con 400 imágenes de rostros de distintas personas con variadas expresiones, adicionalmente se elaboró un base de rostros domiciliar, con 48 imágenes para el entrenamiento del sistema. Como resultado de la evaluación bajo condiciones de laboratorio se obtuvo una eficiencia superior al 90%, mientras que, al ser evaluados en condiciones reales, los algoritmos presentan eficiencias de identificación que oscilan del 50 al 80%, factores que dependen de la distancia, cámara, calidad de imagen, e iluminación. Estableciéndose las condiciones mínimas de requerimientos para la implementación de un sistema de vigilancia domiciliar, con porcentajes de efectividad favorables en estos ambientes, proponiendo una innovación en el uso de la tecnología e ingeniería actual respecto a video vigilancia. The objective of the project is the implementation of two facial recognition algorithms for the identification of people, under real conditions, in this case, an address. Relevant investigations in facial identification have been explored, such as Principal Component Analysis (PCA) and Discriminant Linear Analysis (LDA) methods, mathematical processes used by the Eigenfaces and Fisherfaces algorithms, which are statistical approximation techniques for classifying data, in this case, faces, with minimum computational complexity. The proposed people identification system, developed its algorithms in Matlab, describing its main processing stages such as image acquisition, pre-processing, extractions of facial features, training or classifier, these algorithms will be evaluated of efficiency in the identification of people, used for this a base of public faces of AT & T known as ORL Database of Faces, with 400 images of different faces forgive with various expressions, in addition to this a base of faces domiciliary, with 48 images will be elaborated for system training. As a result of the evaluations under laboratory conditions they present an efficiency of over 90%, while when evaluated in real conditions, the algorithms show efficiencies ranging from 50 to 80% depending on the distances between the subject and the camera, as well as it also depends on the image quality that can be acquired with them. In this way, minimum requirements have been established for the implementation of a home surveillance system, in which favourable percentages of effectiveness will be obtained in these environments, proposing an innovation in the use of current technology in relation to video surveillance. Palabras claves: PCA, Eigenfaces, LDA, Fisherfaces, Base de Datos Públicas, Algoritmo, Reconocimiento. Keywords: PCA, Eigenfaces, LDA, Fisherfaces, Public Database, Algorithm, Recognition

Characterization and dating of coastal deposits of NW Portugal (Minho - Neiva area): a record of climate, eustasy and crustal uplift during the Quaternary

This study presents the characterization and numerical dating of Quaternary coastal deposits of NW Portugal, located between the mouths of the Minho and Neiva rivers. They record continental (small alluvial fans and streams) and transitional (aeolian dunes, interdune ponds, estuary, sandy and gravelly beaches) paleoenvironments. Quartz and K-feldspar optically stimulated luminescence (OSL) dating is employed as well as AMS C-14 dating. A staircase of coastal terraces (abrasion shore platforms) was identified (altimetry, a.s.l.) and ascribed to the following probable Marine Isotope Stages (MIS): T1 - 20-18 m (MIS11); T2 - ca. 13 m (MIS9); T3 - 9.3-7.3 m (MIS7); T4 - 5.5-4.5 m (MIS5); T5 - 3.5-2.0 m (MIS5). The terraces have some preserved sedimentary facies that includes coeval beach sediments on the lowest four. A late Pleistocene to Holocene sedimentary cover comprises four sub-units: a) the lower sub-unit, corresponding to ferruginous stream deposits and aeolian dunes dated ca. 67-61 ka (MIS4), probably related with sub-humid to arid mid-cold conditions; b) on the slopes, the lower sub-unit is overlapped by sandy-silty colluvium and sandy alluvial deposits dated ca. 56-28 ka (MIS3) and probably reflecting cold/mid-cold and wet/dry climate conditions; c) this sub-unit is topped by soliflucted lobes and sandy-silty/silty deposits recording cold and dry climate dated 20-13 ka (MIS2), and d) a top subunit dated to 16-18th century, recording Little Ice Age events, consisting of fluvial sediments coeval with temperate climate evolving to aeolian dunes from the Maunder Minimum (cold windy dry conditions).Portuguese Foundation for Science and Technology (FCT) - grant SFRH/BD/16438/2004 - project PTDC/GEO-GEO/2860/2012 - Sabbatical Leave Grant ref. SFRH/BSAB/1289/2012 - Research also has been supported by both Aarhus University and Risø DTU (Denmark

Effects of Fe doping in La1/2Ca1/2MnO3

The effect of Fe doping in the Mn site on the magnetic, transport and structural properties of polycrystalline La1/2Ca1/2MnO3 was studied. Doping with low Fe concentration (< 10%) strongly affects electrical transport and magnetization. Long range charge order is disrupted even for the lowest doping level studied (~2%). For Fe concentration up to 5% a ferromagnetic state develops at low temperature with metallic like conduction and thermal hysteresis. In this range, the Curie temperature decreases monotonously as a function of Fe doping. Insulating behavior and a sudden depression of the ferromagnetic state is observed by further Fe doping.Comment: 2 pages, presented at ICM2000, to appear in JMM

The social and economic costs of female imprisonment: the prisoners’ point of view

Fundação para a Ciência e a Tecnologia (FCT

Formes alternatives d’exercice de la parentalité: paternité et maternité en contexte carcéral

Explorando o carácter genderizado e socialmente situado do conceito de parentalidade, este artigo analisa, através das narrativas de pais e mães reclusos, as formas alternativas de exercício da paternidade e maternidade no contexto prisional. Os dados sugerem que as diferenças e desigualdades de género se materializam, antes e durante a reclusão, em diferentes cenários de envolvimento para mães e pais com percursos desviantes. Os resultados também evidenciam como se reconfiguram os laços parentais num contexto distanciado das configurações tradicionais e ao qual se somam os impactos criados pelo controlo penal.Exploring the gendered and socially situated nature of the concept of parenting, this article analyzes, through the narratives of prisoners who are parents, the alternative ways of mothering and fathering in the prison context. The data collected suggest that gender differences and inequalities materialize, before and during imprisonment, in different scenarios of involvement for mothers and fathers with offending paths. They also show how parental ties are reconfigured in a context apart from traditional family configurations and marked by the impacts created by penal control.Explorant le caractère sexué, ainsi que la nature socialement située du concept de parentalité, cet article analyse, à travers les narratives de pères et mères détenus, les formes alternatives d’exercice de la maternité et de paternité dans le contexte carcéral. Les données suggèrent que les différences et d’inégalités de genre se matérialisent, avant et après l’emprisonnement, en différents panoramas de rapports dans le cas des mères ou des pères avec des parcours de transgression. Elles montrent aussi comment les liens parentaux sont reconfigurés dans un contexte éloigné des configurations familiales conventionnelles et marqué par les impacts du contrôle pénal.Fundação para a Ciência e a Tecnologi

Mothering from prison and ideologies of intensive parenting: enacting vulnerable resistance

“Intensive parenting” ideologies have been increasingly disseminated in popular culture, expert discourses, and social policy. These have impacted particularly mothers owing to their actual or presumed central role in child rearing. One of the main features of these ideologies is an increasing apportioning of rights and responsibilities to families without taking into account the resources needed to sustain the work of caring according to dominant social expectations. Drawing on 20 interviews in a Portuguese female prison, this article explores how mothering is enacted by underprivileged and criminalized women. Data show a complex web of tensions between the norms implicit in “intensive parenting” ideologies and the actual practices, which imprisoned mothers can accomplish. In their mothering from prison, women enact vulnerable resistance to the penal policies that undermine their primary role in child rearing. That is, prisoners creatively negotiate a space within which they can define themselves as “good mothers.”Fundação para a Ciência e a Tecnologia (FCT