Design and manufacturing workshop using the design thinking methodology

Comunicació presentada al ICERI 2019 12th annual International Conference of Education, Research and Innovation (Seville, Spain. 11-13 November, 2019).The purpose of this paper is to describe and discuss the experience under the methodology of Design Thinking, using a workshop format. This workshop, which took place on October 18th and 19th, 2018, in the BUC (Biblioteca Urbana del Coneixement) building in Vila-real, was attended by about a hundred students who had been displaced from the EASD in Valencia. The objective was to create an artistic work for the municipality of Vila-real with the students collaboration. Design Thinking methodology was implemented to carry out the artistic work. The ultimate goal was not only to get an idea, it was important to build it. The students were able to follow the manufacturing process in collaboration with the KrionTM company that offered their Solid Surface product, which possibilities in design terms this company is currently exploring. This was done in the following months, as the manufacture required its time

Diving behaviour of the critically endangered tope shark Galeorhinus galeus in the Natural Reserve of Bahia San Blas, northern Patagonia

Background:Tope sharks (Galeorhinus galeus) aggregate in large numbers during spring and summer in closedgulfs and bays in northern Patagonia; these locations are considered the main nursery areas for the species.However, little is known about the spatial ecology or diel behaviour of this critically endangered species. The aimwas to evaluate the short-term diving behaviour and habitat preferences of tope sharks using electronic tagging.Findings:Five female tope sharks, four adult and one sub-adult, were tagged with pop-up satellite archival tags inthe Natural Reserve of Bahía San Blas, northern Patagonia, during spring 2011 and 2012. High-resolution archiveddata were collected for 40 days, including 29 days for two recovered tags. Sharks travelled up to 51.2 km after release.Archived data indicated that female tope sharks preferred to remain within 24.5 m of the surface and that there wereno diel changes in preference. Individuals spent most of the time within 10 m of the surface during the day (80%) andat night (83%), and were primarily in water between 17°C and 19°C (day, 75%; night, 70%). Moreover, tope sharksexhibited vertical oscillatory movement (‘yo-yo diving’). Maximum vertical speeds and dive depths were recordedat night. Ascents from depth had a greater speed than descents, overall.Conclusions:Female tope sharks were found in shallow coastal areas during November at Bahía San Blas, near thesurface at relatively restricted depths and temperatures. Longer tracking periods will be important for describingthe species’migratory movements across the south-west Atlantic.Fil: Cuevas, Juan Martín. Universidad Nacional de la Matanza. Instituto de Medio Ambiente; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Universidad Nacional del Comahue. Instituto de Biología Marina y Pesquera Almirante Storni; ArgentinaFil: Garcia, Mirta Lidia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Di Giacomo, Edgardo Ernesto. Universidad Nacional del Comahue. Instituto de Biología Marina y Pesquera Almirante Storni; Argentin

Fast soft-tissue deformations with FEM

Soft body simulation has been a very active research area in computer animation since Baraff and Witkin's 1998 work on cloth simulation, which led Pixar to start using such techniques in all of its animated movies that followed. Many challenges in these simulations come from different roots. From a numerical point of view, deformable systems are large sparse problems that can become numerically unstable at surprising rates and may need to be modified at each time-step. From a mathematical point of view, hyperelastic models defined by continuum mechanics need to be derived, established and configured. And from the geometric side, physical interaction with the environment and self-collisions may need to be detected and introduced into the solver. It is a fact that the Computer Graphics academia primarily focuses on offline methods, both for rendering and simulation. At the same time, the advances from the industry mainly apply to real-time rendering. However, we wondered how such high-quality simulation methods would map to a real-time use case. In this thesis, we delve into the simulation system used by Pixar's Fizt2 simulator, based on the Finite Element Method, and investigate how to apply the same techniques in real-time while preserving robustness and fidelity, altogether providing the user with some interaction mechanisms. A 3D engine for simulating deformable materials has been developed following the described models, with an interactive interface that allows the definition and configuration of scenes and later interaction with the simulation

Study and design of a Polyurethane foam recycling plant

Treballs Finals de Grau d'Enginyeria Química, Facultat de Química, Universitat de Barcelona, Curs: 2021-2022, Tutors: Ricard Torres Castillo, Alexandra Elena Plesu PopescuAs a result of scientific progress, different polymers with very different properties and uses have been developed. The use of these materials is very common, therefore, an unsustainable amount of waste is generated. One of these polymers is polyurethane (PU). The most common type of PU manufactured and the one that generates the most waste are foams, both rigid and flexible. In Spain, there is no defined route for this polymer, causing most of them to end up in landfills. Currently, we are avoiding storing them indefinitely in a landfill, trying to revalue them by reusing or recycling them, and if this is not possible, trying to convert them into energy and heat. Among all recycling methods, the most promising is chemical recycling through glycolysis, which is based on the depolymerization of PU to split it into its monomers using low molecular weight glycols. The industrial development of glycolysis in the split phase is limited by the fact that an excess of glycolysis agent is needed in order to obtain a recycled polyol with better properties that can be used to synthesize new PU foams. This excess of agent makes the process not economically viable. For this reason, an agent has been sought to provide a polyol with good properties from a cheaper agent than diethylene glycol (DEG). Crude glycerol, which is a by-product of biodiesel production, has been considered as an agent capable of depolymerizing PU and at a lower price than DEG. In order to treat a part of the polyurethane flexible (PUF) foam waste generated in Catalonia, a preliminary design of a glycolysis recycling plant has been carried out in the starting phase, to treat 440 t/year of PUF foam waste from mattresses using crude glycerol, as glycolysis agent, and stannous octoate as catalys

Exact discretness and mass gap of N=1 symplectic Yang-Mills from M-theory

In this note we summarize some of the results found recently in hep-th/0609054. We show the pure discretness of the non-perturbative quantum spectrum of a symplectic Yang-Mills theory defined on a Riemann surface of positive genus, living in a target space that, in particular, can be 4D. This theory corresponds to the membrane with central charges. The presence of the central charge induces a confinement in the phase at zero temperature. When the energy rises, the center of the group breaks and the theory enters in a quark-plasma phase after a topological transition, corresponding to the N=4 wrapped supermembrane.Comment: 5pg, latex, w-art class. To appear in the proceedings "RTN ForcesUniverse" Naples, October 9-13, 200

Presentació

Presentació del monogràfic sobre «Temes i formes de la primitiva narrativa catalana breu» coordinat per Marinela Garcia i Llúcia Martín

Les lignes de chemin de fer démantelé en Andalousie: Pour une utilisation en tant que voies de diagnostic et non des monotorizados

Las líneas ferroviarias que han dejado de prestar servicio presentan una oportunidad para ser reutilizadas como ejes alternativos para desplazamientos no motorizados (a pie, en bicicleta, a caballo...), en el marco de una política de desarrollo regional y apuesta por actividades turísticas sostenibles, de base rural. Este artículo identifica las vías férreas desmanteladas en Andalucía, para analizar posteriormente su aptitud de uso -es decir, el estado de adecuación para ser transitadas y la accesibilidad a núcleos de población y redes de comunicación- así como las cualidades ambientales y paisajísticas del entorno que atraviesan. De dicho análisis surge una caracterización de cada una de las vías en función de su mayor o menor idoneidad para acoger dichos usos alternativos (capacidad potencial). Dicho diagnóstico podrá orientar los criterios que las distintas administraciones públicas adopten en el desarrollo de políticas de fomento y recuperación de "itinerarios verdes".Railway lines that are no longer in use have an opportunity to be converted into alternative trafficfree routes -footpaths, cycle lanes...-, as a part of the regional development policy and the support of a sustainable way of tourism. In this paper we identify such former railways lines in Andalusia, and then we analyse the suitability for public use (conditions for the transit and accessibility to urban areas and transport networks). The environmental quality and the surrounding landscape features are also analysed. As a result, we obtain a characterization of each railway line according to the potentiality to be used as a rail trail. Finally, this diagnostic should guide the judgements in the public decision making, within the context of greenway promotion and planning.Lignes de chemin de fer qui ont quitté le service offre une occasion pour les réutiliser comme axes alternatifs pour non motorisés (marche à pied, vélo, cheval ...), dans le cadre d'une politique de développement régional et de l'engagement pour le tourisme base rurale durable. Cet article identifie les chemins de fer démantelé en Andalousie, la façon d'analyser en utilisant aptitude que signifie le fait d'être occupé et de remise en forme pour l'accessibilité des centres de population et des réseaux de communication, ainsi que des qualités environnementales et paysagères de l'environnement qui traverser. A partir de cette analyse une caractérisation de chacun des trajets en fonction de leur degré de pertinence pour tenir compte de ces autres utilisations (capacité potentielle) se pose. Ce diagnostic peut cibler différents critères à adopter en élaboration de politiques gouvernementales et de la récupération de la construction de "voies vertes"

Dominance Measuring Approach using Stochastic Weights

In this paper we propose an approach to obtain a ranking of alternatives in multicriteria decision-making problems when there is imprecision concerning the alternative performances, component utility functions and weights. We assume decision maker's preferences are represented by an additive multi-attribute utility function, in which weights are modeled by independent normal variables, the performance in each attribute for each alternative is an interval value and classes of utility functions are available for each attribute. The approach we propose is based on dominance measures, which are computed in a similar way that when the imprecision concerning weights is modeled by uniform distributions or by an ordinal relation. In this paper we will show how the approach can be applied when the imprecision concerning weights are represented by normal distributions. Extensions to other distributions, such as truncated normal or beta, can be feasible using Monte Carlo simulation techniques

Ranking Alternatives on the Basis of a Dominance Intensity Measure

The additive multi-attribute utility model is widely used within MultiAttribute Utility Theory (MAUT), demanding all the information describing the decision-making situation. However, these information requirements can obviously be far too strict in many practical situations. Consequently, incomplete information about input parameters has been incorporated into the decisionmaking process. We propose an approach based on a dominance intensity measure to deal with such situations. The approach is based on the dominance values between pairs of alternatives that can be computed by linear programming. These dominance values are transformed into dominance intensities from which a dominance intensity measure is derived. It is used to analyze the robustness of a ranking of technologies for the disposition of surplus weapons-grade plutonium by the Department of Energy in the USA, and compared with other dominance measuring methods