Determinación y validación de una matriz genérica de ensayos para el desarrollo de revestimientos en piezas plásticas de automoción.

Treballs Finals de Grau d'Enginyeria Química, Facultat de Química, Universitat de Barcelona, Curs: 2013-2014, Tutors: Jose María Gutiérrez González, Carmen González Azón i Luís Martínez BarrioThe use of automotive plastic parts has greatly increased, and thus the need to develop new coatings to give them protective and visual characteristics. The requirements for the paintings in the automotive industry are evidenced by a list of assays that analyze the structural properties of the product once applied on the plastic component. Note that each automotive group needs a different testing methodology and requirements, and thus validating a product is difficult for several brands. The main objective of this work, identify and validate an assay generic matrix for the development of coatings on automotive plastic components, will be addressed first by the bibliographic study of required assays from the chosen companies to analyse. From this first study, a primary assay matrix containing all existing assays, will be obtained. Using selection criteria, the primary assay matrix will be reduced to one containing the assays to be performed. Once finished the assays, using a system that allows the comparison of the results obtained, the methodology of each assay will be analysed in order to see which is the most severe and therefore the most suitable to form part of an assay generic matrix. That allows performing the validation of a new product for several automotive brands. From the analysis of 8 assays with different methodology, which are common in 12 AkzoNobel's usual automotive market brands, each of them evaluates a different characteristic of the coating. A discriminated result has been obtained in 7 cases, therefore a generic restrictive validation has been generated for the development of new products for several brands

On-line human activity recognition by monitoring the interaction with the objects in a known environment

Until now, the robots environment was characterized for being parametrized. This means, that all tasks must be defined and the robot only needs to repeat the programed action continually. Furthermore, the robot and the user don't share the same workspace. But now, new environments have appeared, bringing a new robotic paradigm where the robots and the users share the same workspace in semistructured environments. The tasks in this new paradigm have a plasticity, where they evolve depending on the user. It is therefore important that the system evolves at the same time than the user. In this project, a solution of an activity recognition system to be used in a robotic assistance on domestic environments is presented. This system works in real-time to monitor the user's activities at the same moment that the action is occurring, computing an early prediction and offering to the system future information about the possible necessities of the user's to finalize the activity that the system predicted. The solution proposed in this project must solve the following sub-objectives: 1. Object Segmentation: The system separates the objects from the scene. We used one model of scene to compare the differences between the model and the actual frame. 2. Object Recognition: The system recognizes what objects are involved in the action. To capture the characteristic points of the objects, we first use the SURF Key-Point of the objects and, then, we convert this information in the Bag of Features representation. In the second step of the process, we use a Support Vector Machine (SVM) to build the classifier structure. 3. Object Tracking: The system obtains the dynamic information of the objects in the scene. The system uses a CamShift algorithm to monitor the state of the objects. 4. Activity Recognition: The system identifies the action that the user is doing taking the previous information into account. Other important issues we need to take into account in the development of this project are: · Scalability: The system needs to be able to grow so that it can consider more cases. The installation of new hardware or the use of new algorithms are two examples of this. · Working in Real Time: The system needs to predict the actions at the same time than they are happening. · Consideration of Different Type of Objects: In domestic scenarios, different types of objects with different characteristics need to be considered. For example, labeled objects, smooth surfaces with a dominant color and textured objects. · The Use of Standard Robot Operation System: We use the Indigo ROS version to develop this project and share the intermediate information of the project so that other projects can use it. The results obtained applying all the process is an accuracy detection of the activity only using the static information. The dynamic information we used to increase the detection of the more complex activities or more complex situations, and the actual version of the project grows in complexity with respect to the previous project but it needs to grow more to take the results of this project into account to increase the trustworthiness of the project

GiD 2008. 4th Conference on advances and applications of GiD

The extended use of simulation programs has leaned on the advances in user-friendly interfaces and in the capability to generate meshes for any generic complex geometry. More than ten years of development have made Gid grow to become one of the more popular pre ans postprocessing systems at international level. The constant dialogue between the GiD development team and the users has guided the development of giD to cover the pre-post needs of many disciplines in science and engineering. Following gthis philosophy, the biannual GiD Conference has become an important forum for discussion and interchange of experiences among the GiD community. This monograph includes the contributions of the participants to the fourth edition of the GiD Conference held in the island of Ibiza from 8-9 May 2008

El uso de recursos multimedia en la representación del territorio: el "Atlas multimedia de Geografía de Aragón"

The "Multimedia Atlas of Aragon" is an application developped in the Department of Geography at the University of Zaragoza; it's devoted to teach and to publish geographical information at regional escale. In this paper We describe and value the navigation system and the tools built in order to take advantage of the capabilities of information tecnology.El "Atlas multimedia de geografía de Aragón" es una aplicación desarrollada en el Departamento de Geografía de la Universidad de Zaragoza, con finalidad docente y para divulgar información geográfica a escala regional. En este artículo se describen y valoran el sistema de navegación y las herramientas diseñadas para aprovechar las capacidades de almacenamiento y procesado de información de la tecnología informática

Funciones: una propuesta didáctica en 3º ESO Matemáticas orientadas a Enseñanzas Académicas

Comenzando con una crítica a la enseñanza habitual de las funciones, este trabajo propone un método alternativo a la enseñanza habitual de funciones, basado en los trabajos de Janvier, Deulofeu y Sierra entre otros. Se trata de explicar el temario de funciones para un curso de 3º ESO de Matemáticas Académicas desde un punto de vista enfocado principalmente en las diferentes translaciones entre formas de representar una función, los métodos gráfico, verbal, tabular y algebraico.<br /

Open tools for electromagnetic simulation programs

Purpose The aim of the paper is to propose three computer tools to create electromagnetic simulation programs: GiD, Kratos and EMANT. Design/methodology/approach The paper presents a review of numerical methods for solving electromagnetic problems and presentation of the main features of GiD, Kratos and EMANT. Findings The paper provides information about three computer tools to create electromagnetic simulation packages: GiD (geometrical modeling, data input, visualisation of results), Kratos (C++ library) and EMANT (finite element software for solving Maxwell equations). Research limitations/implications The proposed platforms are in development and future work should be done to validate the codes for expecific problems and to provide extensive manual and tutorial information. Practical implications The tools could be easily learnt by different user profiles: from end‐users interested in simulation programs to developers of simulation packages. Originality/value This paper offers an integrated vision of open and easily customisable tools for the demands of different users profiles. &nbsp; &nbsp

Red de Centros Educativos y desequilibrios territoriales. El caso de Aragón

In this paper, territorial organisation of educational services in Aragon is studied. This Spanish region is characterized by strong territorial imbalances, as indicated by areas with a very low population density, a feeble settlement network and a transport infrastructure of low density and capability. These imbalances make difficult to provide the educational services that citizens have the right to access in conditions of territorial equity and efficiency. In this context, the suitability of school network to territorial structure is analysed. The great majority of the private centres, according to demand criteria, are located in the urban settlements. Otherwise, the network of public centres reaches the most part of the territory.En este trabajo se analiza la organizaci&oacute;n territorial de los servicios educativos en Arag&oacute;n. Esta Comunidad se caracteriza por fuertes desequilibrios territoriales, como pone de relieve la existencia de extensas &aacute;reas de muy baja densidad de poblaci&oacute;n, dotadas de redes de asentamientos muy laxas y de infraestructuras de transporte poco densas y de baja capacidad, lo cual dificulta la prestaci&oacute;n, en condiciones de equidad y eficiencia territorial, de los servicios educativos a los que tienen derecho todos los ciudadanos. En este contexto se estudia la adecuaci&oacute;n de la red de centros escolares a la estructura territorial. Los centros privados se localizan siguiendo criterios de demanda y por ello se ubican casi exclusivamente en los n&uacute;cleos urbanos, mientras que la red de centros p&uacute;blicos alcanza a la mayor parte del territorio

Direct comparison of the sensitivity of QCMs and AlN-based TFRs biosensors

We present the direct comparison of the performance of two gravimetric biosensors based on acoustic resonators, a quartz crystal microbalance and a high frequency AlN-based bulk acoustic wave film solidly mounted resonator (SMR). Both sensors are functionalized with streptavidin to detect the response to TBA29 aptamer biotin modified and different concentrations of thrombin. Experimental results reveal that both sensors succeed in detecting the targeted species, although SMRs show significantly greater sensitivity and a lower limit of detectio

Influence of Soft Drinks with Low pH on Different Ni-Ti Orthodontic Archwire Surface Patterns

The aim of this study was to determine the influence of soft drinks on the surface of Ni-Ti archwires and their corrosion behavior. Archwires with different patterns (smooth, scratch, dimple, and crack) were selected and characterized by scanning electron microscopy and laser confocal microscopy. Immersion tests were performed in artificial saliva (pH 6.7) with a soft drink with a pH of 2.5 for 28 days. The results showed an increase in the surface defects and/or roughness of the dimple, crack and scratch patterns with the immersion times, and a decrease in corrosion resistance. A relationship between the surface pattern and the extent of the corrosion in Ni-Ti archwires with soft drinks at low pH has been demonstrated. Pattern should be taken into account in future studies, and manufacturing processes that produce surface defects (especially cracks) should be avoided

Bacteria detection with high-frequency gravimetric biosensors based on AlN thin film resonators

Gravimetric sensors based on shear-mode resonators are suitable for in-liquid detection of biological species because their quality factors barely decrease during in-liquid operation. However, we have found that in the particular case of large ligands, such as bacteria, the transmission of the surface movement to them appears to be more efficient when movement takes place normal to the surface (longitudinal modes) instead of to parallel to it (shear modes). In this work, we succeeded in detecting bacteria with AlN-based bulk acoustic wave solidly mounted resonators operating in longitudinal modes at 2 GHz that we were unable to detect with shear mode