640 research outputs found

    Hepheastus account on Trojanski’s polyhedral war

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    We survey several open problems in the theory of isomorphically polyhedral Banach spaces related to Troyanski’s research.• Project MTM2013-45643- C2-1-P (I+D 2013) • Instituto Nazionale di Alta Matematica, GNAMPA.peerReviewe

    Hepheastus account on Trojanski’s polyhedral war

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    We survey several open problems in the theory of isomorphically polyhedral Banach spaces related to Troyanski’s research.• Project MTM2013-45643- C2-1-P (I+D 2013) • Instituto Nazionale di Alta Matematica, GNAMPA.peerReviewe

    The institutional foundation of social class differences in pro-redistribution attitudes: a cross-national analysis, 1985-2010

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    Our understanding of cross-national differences in the relationship between social class location and voting choices has improved substantially in the last decade. Yet scholarship about cross-national and longitudinal variations in the relationship between class location and policy preferences remains neglected. This paper addresses this important gap in the literature through a comparative, longitudinal analysis of the substantial, cross-national variation of class differences in pro-redistribution attitudes. To explain this variation, we focus on the role of preexisting policies and engage with an ongoing debate in the policy feedbacks literature. The self-interest approach argues that higher redistribution creates incentives among the upper classes to oppose redistribution, widening the class cleavage. By contrast, the normative approach argues that universal social policy regimes meet the fairness criteria of middle and upper classes, thereby reducing attitudinal differences. Using an innovative data set containing 106 country-years between 1985 and 2010, our study supports the self-interest approach. Countries achieving more redistribution display larger class cleavages in pro-redistribution attitudes, while universalism does not reduce this divide. The study further shows that redistribution and class cleavage are linearly related because redistribution bolsters the already low commitment with inequality reduction in the upper service and lower service classes.The project was generously funded by two grants from the Spanish Ministry of Economy and Competitiveness (CSO2011-29346 and CSO2015-70297) and an A.SK Post-doctoral Fellowship in the Berlin Social Science Research Center

    The Use of Social Media in the Andalusian Universities: The Case of Facebook and Twitter

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    La Universidad es una institución al servicio de la sociedad. Con su actividad y conocimientos se avanza en el desarrollo social, económico y cultural. La Web 2.0 permite que la organización interactúe con sus públicos y con los usuarios, comunicándose a un nivel nuevo, sin limitaciones temporales o espaciales. La siguiente investigación se lleva a cabo sobre las Universidades Públicas Andaluzas, para estudiar su presencia en las redes sociales, y el uso que están haciendo de las mismas; concretamente, sobre Facebook y Twitter, por ser las redes sociales más destacadas y populares. La metodología utilizada es de carácter empírico-analítico, y se apoya en el uso de la técnica del análisis de contenido

    Efecte d’un programa d’intervenció basat en l’expressió corporal sobre la millora conceptual d’hàbits saludables en nens de sisè curs

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    S’ha portat a terme una intervenció per a la millora conceptual d’hàbits saludables a través de l’Expressió Corporal en alumnes de 6è de primària. El treball esmentat es va realitzar durant 10 sessions aplicades al grup experimental; es va utilitzar la indagació com a principal tècnica d’ensenyament, i també un full complementari de treball sobre el contingut conceptual desenvolupat en la sessió. El grup control va realitzar allò que hi havia previst a la programació d’aula aprovada en el projecte educatiu del centre. El coneixement conceptual sobre hàbits saludables va ser avaluat mitjançant un qüestionari de 57 preguntes. Els resultats van mostrar un augment altament significatiu del nivell de coneixement del Grup Experimental (p < 0,0001) en passar de 34,36 ± 6,23 en el pretest a 48,86 ± 4,26 en el posttest i mantenir-se en 48,14 ± 2,68 en el retest. Encara que el Grup Control també va experimentar un increment significatiu (p < 0,01), en passar de 33,79 ± 3,70 en el pretest a 37,71 ± 3,50 en el posttest i baixar a 34,79 ± 3,59 en el retest. Els resultats obtinguts corroboren la idoneïtat del programa d’intervenció. Es conclou que l’Expressió corporal pot ser un contingut adequat per millorar el coneixement sobre hàbits de vida saludables

    Collective religiosity and the gender gap in attitudes towards economic redistribution in 86 countries, 1990-2008

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    What is the relationship between gender and the demand for redistribution? Because, on average, women face more economic deprivation than men, in many countries women favor redistribution more than men. However, this is not the case in a number of other countries, where women do not support redistribution more than men. To explain this cross-national paradox, we stress the role of collective religiosity. In many religions, theological principles both militate against public policies designed to redistribute income, and also promote traditionally gendered patterns of work and family involvement. Hence, we hypothesize that, in those countries where religion remains influential either through closer church-state ties or an intensely religious population, men and women should differ less in their attitudes towards redistribution. Drawing upon the World Values Survey, we estimate three-level regression models that test our religiosity-based approach and two alternative explanations in 86 countries and 175 country-years. The results are consistent with our hypothesis. Moreover, in further support of our theoretical approach, societal religiosity undermines pro-redistribution preferences more among women than men. Our findings suggest that collective religiosity matters more to the gender gap in redistributive attitudes than traditional political and labor force factors. (C) 2016 Elsevier Inc. All rights reserved.This project was partially supported by the Spanish Ministry of Economy and Competitiveness (CSO2011-29346)

    Thermo-photo degradation of 2-propanol using a composite ceria-titania catalyst: Physico-chemical interpretation from a kinetic model

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    This work describes a study carried out to construct and determine a kinetic formalism for the gas-phase degradation of 2-propanol using a combined thermo-photo based process. Outstanding catalytic performance was observed for a composite ceria-titania system with respect its parent ceria and titania reference systems. Thermo-photo as well as parallel photo- and thermal-alone experiments were carried out to interpret catalytic behavior. The kinetic experiments were conducted using a continuous flow reactor free of internal and external mass-heat transfer and designed using a Box-Behnken formalism. The kinetic expression developed for the thermo-photo degradation process explicitly includes the effect of the photon absorption in the reaction rate and leads to a mathematical formula with two components having different physico-chemical nature. This fact is used to settle down a fitting procedure using two steps (two separated experimental sets of data concerning temperature, light intensity, oxygen, water and/or 2-propanol concentrations) with, respectively, four and three parameters. The kinetic formalism was validated by fitting the experimental data from these two independent experiments, rendering a good agreement with the model predictions. The parameters coming from the kinetic modelling allow an interpretation of the catalytic properties of the ceria-titania catalyst, quantifying separately its enhanced performance (with respect to its parent systems) in the photonic and thermal components for the process. The procedure is applicable to a wide variety of thermo-photo processes in order to contribute to the understanding of their physical roots

    Romantic myths and cyber dating violence victimization in Spanish adolescents: A moderated mediation model.

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    Adolescents' beliefs in romantic myths of love have been related to cyber dating violence victimization. However, these relationships could be mediated by adolescents' tolerant attitudes toward dating abuse and be different for adolescent boys and girls. A better understanding of these relationships is important for developing more effective prevention programs. Thus, the current study aimed to examine the relationships between beliefs in romantic myths and cyber dating violence victimization in adolescents, analyzing the possible mediating role of tolerant attitudes toward abuse and the possible moderator role of gender. Participants were 467 Spanish adolescents who had a romantic relationship (54.4% girls; M age = 15.09). Results showed positive significant direct and indirect relationships, through tolerant attitudes toward abuse, between beliefs in romantic myths and cyber dating violence victimization. Gender was not a moderator variable in the direct relationships, but its moderator role was supported in the indirect relationships. Stronger positive links between romantic myths and tolerant attitudes toward abuse, and between tolerant attitudes and cybercontrol victimization, were found in adolescent girls. These findings highlight the need to consider tolerant attitudes toward abuse in intervention programs designed to prevent cyber dating violence victimization in adolescents and continue to analyze gender differences in variables related to cyber dating violence victimization

    Modeling of an Overactuated Vehicle in Simscape Multibody for the Characterization of Suspension and Steering Actuation Systems.

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    Overactuated systems are increasingly among us. They are used for applications in vehicles, aeronautics and robotics, among others [1, 2]. These systems have a number of advantages, among which we can mention that there are multiple (or infinite) solutions for a given problem. More specifically, in the case of overactuated vehicles, similar states of the system can be achieved in many different ways. These systems are still under development, especially in the field of vehicle dynamics. For example, there are various steer-by-wire algorithms, when the steering of the vehicles is independent, or brake blending strategies. In this work, a part of an overactuated vehicle is designed and validated. This multiphysics model allows to know the plant of the system in much more depth in order to develop control algorithms. More specifically, by modeling the delay of the systems and the nonlinear relationships inherent to multibody systems, much more accurate predictive control can be performed. These results allow a previous validation of the control algorithms in the test platform vehicle being manufactured and developed by the research group, greatly accelerating the control process of each of the overactuated systems of the vehicle.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    "INTERGROWTH21st vs customized fetal growth curves in the assessment of the neonatal nutritional status: a retrospective cohort study of gestational diabetes"

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    Background Gestational diabetes mellitus is associated with increased incidence of adverse perinatal outcomes including newborns large for gestational age, macrosomia, preeclampsia, polyhydramnios, stillbirth, and neonatal morbidity. Thus, fetal growth should be monitored by ultrasound to assess for fetal overnutrition, and thereby, its clinical consequence, macrosomia. However, it is not clear which reference curve to use to define the limits of normality. Our aim is to determine which method, INTERGROWTH21st or customized curves, better identifies the nutritional status of newborns of diabetic mothers. Methods This retrospective cohort study compared the risk of malnutrition in SGA newborns and the risk of overnutrition in LGA newborns using INTERGROWTH21st and customized birth weight references in gestational diabetes. The nutritional status of newborns was assessed using the ponderal index. Additionally, to determine the ability of both methods in the identification of neonatal malnutrition and overnutrition, we calculate sensitivity, specificity, positive predictive value, negative predictive value and likelihood ratios. Results Two hundred thirty-one pregnant women with GDM were included in the study. The rate of SGA indentified by INTERGROWTH21st was 4.7% vs 10.7% identified by the customized curves. The rate of LGA identified by INTERGROWTH21st was 25.6% vs 13.2% identified by the customized method. Newborns identified as SGA by the customized method showed a higher risk of malnutrition than those identified as SGA by INTERGROWTH21st. (RR 4.24 vs 2.5). LGA newborns according to the customized method also showed a higher risk of overnutrition than those classified as LGA according to INTERGROWTH21st. (RR 5.26 vs 3.57). In addition, the positive predictive value of the customized method was superior to that of INTERGROWTH21st in the identification of malnutrition (32% vs 27.27%), severe malnutrition (22.73% vs 20%), overnutrition (51.61% vs 32.20%) and severe overnutrition (28.57% vs 14.89%). Conclusions In pregnant women with DMG, the ability of customized fetal growth curves to identify newborns with alterations in nutritional status appears to exceed that of INTERGROWTH21s
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