Osteocondritis disecante de la cabeza del 2º metacarpiano en un niño: a propósito de un caso

La osteocondritis disecante en articulaciones de la mano es un proceso muy raro, sólo existen dos casos previos publicados en la literatura. Presentamos un paciente de 10 años de edad con dolor e impotencia funcional de la articulación metacarpofalángica de la mano izquierda de semanas de evolución. Con el diagnós - tico final de osteocondritis disecante realizamos una resección del fragmento libre asociadas a perforaciones con aguja fina. Tras el primer año de seguimiento el paciente se encuentra asintomático y se observa remodelación casi completa de la superficie articular.Ostheocondritis in the hand is a rare process. Only two cases were reported in the previous litera - ture. In this report we present a 10 years old boy with pain and a few functional limitation in second metacarpal phalangeal joint for weeks. With the final diagnosis of osteochondritis dissecans we performed surgery. Intraope - ratively the cartilage flap was removed and some drilling was realized. Before one year the patient was asympto - matic and we observed an improvement of articular surface

Essays on delegation and social norms

This thesis presents the results of my doctoral studies at Middlesex University London. It contains different papers related to Labour Markets and presents some results on production, delegation and dishonest behaviour. The first study compares how group size interacts with both constrained and un-constrained resource environments, finding that resource limitations diminish production over time and that all the groups learn with experience. The second explores the effects of incentives in dishonest behaviour in both the gain and loss domain finding that contrary to theoretical predictions, subjects do not cheat more when they are facing a loss. The third, studies the distributions derived from different delegation scenarios. We find that the distributions derived from optional delegation are more egalitarian than the ones made under compulsory delegation. Finally, I study gender differences in delegation finding that gender biases only arise in compulsory delegation, and not under endogenous delegation, and at an agent level

Rammed earth walls in Mediterranean climate: material characterization and thermal behaviour

Rammed earth is considered a very sustainable construction system due to its low embodied energy, long service life and high recyclability. However, authors found that there is a lack of experimental results at real scale regarding rammed earth thermal behaviour. For this reason, this paper is first focused on the characterization of two different types of earth in order to check the suitability of being used in rammed earth walls. After the characterization, two experimental cubicle-shape buildings were built in Barcelona and Puigverd de Lleida (Spain) in order to test the thermal behaviour of their walls in two different climatic conditions. Temperature profiles inside walls have been monitored using thermocouples and temperature profile of southern walls was analysed in free floating conditions during summer and winter periods of 2013. Results show that thermal amplitude from outside to inside temperatures are decreased by rammed earth walls, achieving constant temperatures in inner surface of southern walls.Peer ReviewedPostprint (published version

Self-selecting into being a dictator: distributional consequences

We allow for principals to self-select into delegating, or not, the allocation decision to an agent in a modified dictator game. The standard dictator game arises when principal´s choose to make the allocation decision themselves. Dictators thus obtained transfer lower amounts to receivers, relative to when the decision making is passed to an agent under delegation (or in the standard dictator game). Principals choose to be a dictator nearly half of the time. The average amount transferred by individuals who delegate in more than half of the rounds is significantly higher than the quantity transferred by those who choose to delegate in less than half of the rounds. Finally, the distributional consequences of delegating, or not, vary with less inequality obtained when the decision is delegated

Gender differences in cheating: loss vs gain framing

We use the die-paradigm to study gender differences in cheating behavior. We find that i) both males and females do not cheat in the absence of financial incentives, ii) both males and females cheat (but not maximally) if reports are associated with financial gains or losses, and iii) males and females do not cheat differentially

Spinodal-assisted crystallization in polymer melts

Recent experiments in some polymer melts quenched below the melting temperature have reported spinodal kinetics in small-angle x-ray scattering before the emergence of a crystalline structure. To explain these observations we propose that the coupling between density and chain conformation induces a liquid-liquid binodal within the equilibrium liquid-crystalline solid coexistence region. A simple phenomenological theory is developed to illustrate this idea, and several experimentally testable consequences are discussed. Shear is shown to enhance the kinetic role of the hidden binodal

Paleofitogeografía de los pinares en las montañas periféricas de la cuenca del Duero

En las dos últimas décadas se han obtenido numerosos resultados procedentes de diferentes trabajos paleobotánicos (Cuaternario final) realizados en los territorios montanos periféricos de la depresión del Duero. Las metodologías empleadas han sido diversas y tienen que ver con los diferentes tipos de yacimientos y de muestras biológicas seleccionadas para su estudio; entre ellas destacan las técnicas de microscopía óptica para la identificación de maderas subfósiles, la morfología comparada de macrorrestos y los estudios dendrocronológicos en árboles longevos y maderas subfósiles. En esta comunicación se reúnen y resumen los trabajos más importantes, haciéndose una síntesis de las conclusiones obtenidas en los trabajos paleofitogeográficos realizados hasta el momento; se hace hincapié en la información proporcionada por los macrorrestos (maderas, estróbilos) así como por la recogida en los registros dendrocronológicos (con extensión a la dendroecología). Otro de los objetivos de la comunicación es la síntesis de las conclusiones obtenidas en los trabajos paleofitogeográficos realizados hasta el momento. Uno de esos resultados es que el comportamiento de los pinares a lo largo del Holoceno presenta diferentes modalidades en cada una de las cordilleras que bordean la cuenca del Duero; desde casos con marcada estabilidad a otros en que se muestran variaciones temporales apreciables (con patrones de heterogeneidad en función de un eje N-S y/o O-E

The effect of wage proposals on efficiency and income distribution

Pre-play non-binding communication in organizations is prevalent. We study the implications of pre-play wage proposals and information revelation in a labour relationship in a laboratory experiment. In the baseline, that depicts a typical labour market interaction, the employer makes a wage offer to the worker who may then accept or reject it. In a subsequent treatment, workers, moving first, make private, non-binding, wage proposals to the employer. Our findings suggest that wage proposals promote higher wages, efficiency, and income equality. We run an additional experiment as a robustness check where we make the wage proposals public. We find that most of the results hold. Similar wage proposals are observed in the Public and Private information treatments, while accepted wages in the public treatment are higher than the baseline and significantly lower than under private information. It seems that workers conform to the available information on the wage of their co-worker from the last period when proposals are public. Interestingly, while both benefit over the baseline, public information on wage proposals benefits firms more than workers. We also develop a theoretical model to rationalize our results. The experimental results provide broad support for our hypotheses