THE WEALTH DISTRIBUTION WITH DURABLE GOODS

This paper studies the effect that illiquid assets and collateral credit frictions have on the level of wealth inequality in a standard model of ex-ante heterogenous agents with idiosyncratic uncertainty. We calibrate our model so that its steady state statistics match selected aggregate statistics of the U.S. economy and data on the earnings distribution. We find that adding illiquid assets and collateral credit frictions decreases wealth inequality decreases slightly relative to an economy with liquid assets and no credit frictions. The effect is small because these frictions mostly affect poor households that account for a small fraction of aggregate wealth. Nevertheless, our richer model allows us to study other dimensions of wealth inequality. In particular, our model replicates the fact that financial assets are more concentrated than total wealth, while residential assets are less concentrated. Furthermore, we document that, in the U.S., the earnings and housing distributions are remarkably similar. Our model can account for this fact so long as the earnings process is fairly persistent

Dynamic Modelling and Optimisation of Large-Scale Cryogenic Separation Processes

In this work, the open loop dynamic optimisation of a large-scale natural gas processing plant is performed. A rigorous differential-algebraic equation (DAE) model has been formulated to represent main plant units, such as shell and tube heat exchangers, highpressure separator and demethanizing column. In the shell and tube heat exchangers, the hot stream partially condenses and equations to consider the partial condensation of the fluids have been included. A rigorous index one model for the demethanizing column has been developed. The DAE optimisation problem is solved with a simultaneous approach, in which both state and control variables are discretised and the original DAE optimisation model is transformed into a large-scale nonlinear problem (NLP), which is solved using Sequential Quadratic Programming (SQP) methods. Optimal profiles have been obtained for main operating variables to achieve an enhanced product recovery.Fil: Rodriguez, Mariela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Bandoni, Jose Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Díaz, María Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentin

Regeneration of plants from somatic embryos of Verticillium dahliae-resistant wild olive genotypes

Regeneration capacity, via somatic embryogenesis, of several wild olive genotypes differing in their response to Verticillium wilt (resistant genotypes Stop Vert, Out Vert, Ac4 and Ac 18 and the susceptible Ac 15) has been evaluated. To induce somatic embryogenesis, methodologies previously used in cultivated (high ratio cytokinin/auxin) or wild olive (low ratio cytokinin/auxin) were used. Obtained results revealed the importance of genotype, explant type, mineral formulation and hormonal balance in the induction process, ca. use of apical buds obtained from micropropagated shoots following the methodology of Mazri et al. (2013) in cultivated olive (4 days in liquid medium MS ½, 30 µM TDZ – 0.54 µM ANA, 8 weeks in basal medium MS ½, followed by subculturing in ECO basal medium supplemented with 0.5 µM 2iP, 0.44 µM BA and 0.25 µM IBA) was adequate to obtain somatic embryos in 2 genotypes, Stop Vert and Ac18, but no embryogenic response was observed in the other three. An analysis of genetic stability on Stop Vert, using SSR and RAPDs markers, was carried out in embryogenic callus, plants regenerated form this callus and micropropagated shoots in comparison with the mother plant. Polymorphism was only observed in the banding pattern generated by RAPDs in one of the 10 callus samples evaluated, resulting in a variation rate of 0.07%. This is the first time in which plants have been regenerated via somatic embryogenesis in wild olive.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Research project: Junta de Andalucía P11-AGR799

Heterologous expression of AtNPR1 gene in olive for increasing fungal tolerance

The NPR1 gene encodes a key component of SAR signaling mediated by salicylic acid (SA). After a pathogen infection, the accumulation of SA releases NPR1 monomers in the cytosol that are translocated to the nucleus, activating the expression of pathogenesis-related (PR) genes. Overexpression of NPR1 has conferred resistance to fungal, viral and bacterial pathogens in several plant species. The aim of this research was to generate transgenic olive plants expressing the gene AtNPR1 from Arabidopsis thaliana to obtain material resistant to fungal pathogens. Three transgenic lines expressing AtNPR1 gene under the control of the constitutive promoter CaMV35S were obtained following the protocol of Torreblanca et al. (2010), using an embryogenic line derived from a seed of cv. Picual. Level of AtNPR1 expression in transgenic calli varied greatly among the different lines, being higher in the line NPR1-780. The elicitation of embryogenic calli in liquid medium with AS did not increase endochitinase activity, a PR protein. However, jasmonic acid induced a transient increase in chitinase activity after 24 h of treatment in all the lines, being the increment higher in transgenic NPR1 than in control. After maturation and germination of transgenic somatic embryos, plants were micropropagated and acclimated to ex vitro conditions. The expression of AtNPR1 did not alter the growth of transgenic plants neither in vitro nor in the greenhouse. Experiments are in progress to determine the resistance of transgenic AtNPR1 plants to V. dalihae and R. necatrix.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Research projects: Plan Nacional AGL2014-52518-C2-1-R; AGL2017-83368-C2-1-R and Junta de Andalucía P11-AGR799

Experiencias homofóbicas : algunas voces desde la Universidad de Huelva

En este trabajo, se analizan las experiencias propias de estudiantes de los grados en Educación Infantil y Primaria de la Universidad de Huelva que hayan vivenciado posibles actitudes homofóbicas hacia la diversidad afectivo-sexual. Participaron cinco estudiantes. Se emplearon entrevistas semiestructuradas con los y las estudiantes para la recogida de la información. Además, se obtuvo información complementaria por parte de la secretaría y de algunos docentes de la Facultad de Educación, Psicología y Ciencias del Deporte de la misma universidad. Los resultados indican que todos/as los/as participantes del estudio han vivenciado o han sido objeto de alguna experiencia homofóbica. Las causas, las consecuencias y los contextos relacionados con dichas experiencias son muy diversos. Por último, aunque algunas personas e instituciones intervinieron en las experiencias homofóbicas, ninguna de ellas fue solventada.In this study, we analyze the experiences of students in the Early Childhood and Primary Education of the University of Huelva who have experienced possible homophobic attitudes towards affective-sexual diversity. Five students participated. Semistructured interviews were used with the students to collect the information. In addition, additional information was obtained from the secretary and some teachers from the Faculty of Education, Psychology and Sports Science of the same university. The results indicate that all the participants of the study have experienced or have been the object of some homophobic experience. The causes, consequences and contexts related to these experiences are very diverse. Finally, although some people and institutions intervened in homophobic experiences, none of them was solve

Temperature and particle concentration influence on the complex viscous behavior of a hydrophilic fumed silica suspension

Shear-thinning behavior (decrease of the apparent steady viscosity with shear) due to breaking of weak particle flocs and posterior alignment of individual particles in layers parallel to the flow direction is usually observed before the appearance of the shear-thickening behavior (increase of the apparent steady viscosity with shear). The shear-thickening behavior is mainly due to the dominant role played by hydrodynamic over Brownian and colloidal forces at relatively high shear. As a rule, the onset of shear-thickening behavior and the maximum viscosity value appear at lower shear rates when solid concentration increases, and temperature decreases. However, the influence of solid concentration and temperature on shear stress characteristic values have received less attention despite being the shear stress the true cause of microstructure changes that can provoke the appearance of the shear-thickening behaviour. A recently published empirical equation for the shear stress dependence of the steady viscosity of shear thickening fluids [T. Shende, V.J. Niasar, M. Babaei, J. Mol. Liq. 325 (2021) 115220] has been used for fitting experimental data (MARSIII, Thermo-Haake, Germany) of a hydrophilic fumed silica suspension (A200 (Evonik, Germany) in PPG400 (Sigma-Aldrich, Germany)). The influence of temperature (10,\ 30,\ 50,\ 70\degc) and solid concentration (10,\ 15,\ 20,\ 25%\ wt) on the shear-thickening behavior has been monitored recording their influence on the model parameters.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

A general framework for intelligent recommender systems

AbstractIn this paper, we propose a general framework for an intelligent recommender system that extends the concept of a knowledge-based recommender system. The intelligent recommender system exploits knowledge, learns, discovers new information, infers preferences and criticisms, among other things. For that, the framework of an intelligent recommender system is defined by the following components: knowledge representation paradigm, learning methods, and reasoning mechanisms. Additionally, it has five knowledge models about the different aspects that we can consider during a recommendation: users, items, domain, context and criticisms. The mix of the components exploits the knowledge, updates it and infers, among other things. In this work, we implement one intelligent recommender system based on this framework, using Fuzzy Cognitive Maps (FCMs). Next, we test the performance of the intelligent recommender system with specialized criteria linked to the utilization of the knowledge in order to test the versatility and performance of the framework

Design of stable metabolic networks

In this work, we propose eigenvalue optimization combined with Lyapunov theory concepts to ensure stability of the Embden—Meyerhof–Parnas pathway, the pentosephosphate pathway, the phosphotransferase system and fermentation reactions of Escherichia coli. We address the design of a metabolic network for the maximization of different metabolite production rates. The first case study focuses on serine production, based on a model that consists of 18 differential equations corresponding to dynamic mass balances for extracellular glucose and intracellular metabolites, and thirty kinetic rate expressions. A second case study addresses the design problem to maximize ethanol production, based on a dynamic model that involves mass balancesfor 25 metabolites and 38 kinetic rate equations. The nonlinear optimization problem including stability constraints has been solved with reduced space Successive Quadratic Programming techniques. Numerical results provide useful insights on the stability properties of the studied kinetic models.Fil: Di Maggio, Jimena Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Blanco, Anibal Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Bandoni, Jose Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Diaz Ricci, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; ArgentinaFil: Díaz, María Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentin

Tiempo Muerto, case study of a transmediatic project for the achievement of university competences

El modelo universitario actual establece un estándar de evaluación basado en la consecución de competencias como modo de representación de la adquisición de conocimientos. Por su parte, en el ámbito de la comunicación audiovisual, las narrativas transmedia han surgido como un modelo de comunicación que hace uso de diferentes lenguajes y códigos dentro del engranaje audiovisual digital. La relación transversal de los dos ámbitos hace posible establecer una sinergia en la que la realización de un tipo de proyecto concreto de como resultado la consecución de dichas competencias preparando de forma positiva al alumno dentro de la Sociedad del Conocimiento. En esta experiencia docente se pone de manifiesto el proyecto transmedia Tiempo Muerto Webserie, realizado por un grupo de alumnos de 4º de Grado en Comunicación Audiovisual. Se abordan aspectos como la construcción de un relato transmedia, sus pistas de migración, los microrrelatos paralelos o la participación del usuario. Además, se valora de forma cuantitativa tanto el índice de audiencia como el grado de satisfacción del alumnado en cuanto a la consecución de competencias. La metodología cualitativa permite profundizar en las dinámicas de trabajo grupal y aspectos vinculados con el futuro laboral del estudiante tras la realización del proyecto, que supone un punto de encuentro de los conocimientos aprendidos durante los cuatro años de su etapa universitaria. Los resultados obtenidos a lo largo de seis años académicos, culminados con el presente estudio de caso, ponen de relieve tanto las herramientas transmedia como la inclusión de estrategias educativas innovadoras.The current university model establishes an evaluation standard based on the achievement of competences as a way of representing the acquisition of knowledge. For its part, in the field of audiovisual communication, transmedia narratives have emerged as a communication model that makes use of different languages and codes within the digital audiovisual gear. The cross-sectional relationship of the two areas makes it possible to establish a synergy in which the realization of a specific type of project results in the achievement of these competencies, preparing the student positively within the Knowledge Society. In this classroom experience, the Transmedia Tiempo Muerto Webserie project is developed by a group of 4th grade students in Audiovisual Communication. It shows aspects such as the construction of a transmedia story, its migration tracks, parallel micro-stories or user participation. In addition, the audience level or satisfaction degree of the students towards the achievement of competences is assessed quantitatively. The qualitative methodology allows deepening the dynamics of group work and aspects related to the student's future work when they have finished the project, which is a meeting point for the knowledge learned during the four years of his university stage. The results collected during six academic years, culminated with the present case study, highlight both the transmedia tools and the inclusion of innovative educational strategies