Impacte de l'ús de videojocs als alumnes de cicles formatius de la família d'informàtica

Aquest Treball Fi de Màster és un estudi sobre els efectes que tenen l'ús dels videojocs en alumnes del Cicle Formatiu de Grau Mitjà de Sistemes Microinformàtics i Xarxes d'un centre de Formació Professional concret. Inicialment es realitza una petita descripció, recull històric i es donen dades sobre la indústria dels videojocs. Posteriorment es realitza un resum de l'article The multiple dimensions of video game effects, del Douglas A. Gentile, que servirà de base teòrica per realitzar un anàlisis dels efectes dels videojocs. A través de la realització d'una enquesta sobre els hàbits d'ús de videojocs i sobre altres hàbits dels estudiants, s'obtindran uns resultats que posteriorment serviran per a realitzar una sèrie de propostes d'activitats a aplicar al centre de formació professional

On the Role of Relative Prices and Capital Flows in Balance-of-Payments Constrained Growth: the Experiences of Portugal and Spain in the Euro Area

Broadly speaking, the balance-of-payments constraint hypothesis as developed by Thirlwall has been empirically supported. Yet, it shows some shortcomings highlighted in the literature. In our opinion, two of them must be analysed. First, temporary disequilibria and capital flows must be incorporated into the balance-of-payments constrained growth models. Second, the role of relative prices must be made explicit, since it can be relevant even in an external constraint framework. This study is aimed at developing a model that incorporates both possibilities: temporary external disequilibria and a the impact of relative prices. This model is subsequently used to analyse the evolution of the Spanish and Portuguese economies in last decades, and, in particular, the different path shown by both countries since their accession to the Eurozone.Pese al respaldo empírico con el que ha contado la teoría de la restricción externa desarrollada a partir del modelo de Thirlwall, éste muestra algunas deficiencias destacadas en la literatura. En nuestra opinión, dos de ellas merecen ser analizadas. Por un lado, la necesidad de incorporar desequilibrios transitorios de la balanza de pagos y los consiguientes flujos de capital. Por otro, creemos los precios relativos pueden desempeñar un papel importante en el comercio exterior, sin que ello invalide la existencia de una restricción externa. El objetivo del presente trabajo consiste en desarrollar un modelo que incorpore ambas cuestiones, permitiendo, así, un mayor protagonismo a los precios relativos y a los desequilibrios temporales de la balanza de pagos. Este modelo se emplea posteriormente para analizar la evolución de las economías española y portuguesa en las últimas décadas y, en especial, las diferencias mostradas desde su incorporación a la Eurozona.Growth, Balance of payments constraint, Exchange rate.

Algoritmos genéticos locales

Los Algoritmos Genéticos Locales son procedimientos que iterativamente re nan soluciones dadas. Su diferencia con procedimientos de mejora iterativa clásicos reside en el uso de operadores genéticos para realizar el re namiento. En este estudio presentamos un nuevo Algoritmo Genético Local Binario basado en un Algoritmo Genético Estacionario. Hemos comparado el Algoritmo Genético Local Binario con otros procedimientos de mejora iterativa de la literatura. Los resultados muestran que, para un amplio rango de problemas, el Algoritmo Genético Local Binario mejora consistentemente a los otros procedimientos de mejora iterativa

Traffic engineering in multihomed sites

It is expected that IPv6 multihomed sites will obtain as many global prefixes as direct providers they have, so traffic engineering techniques currently used in IPv4 multihomed sites is no longer suitable. However, traffic engineering is required for several reasons, and in particular, for being able to properly support multimedia communications. In this paper we present a framework for traffic engineering in IPv6 multihomed sites with multiple global prefixes. Within this framework, we have included several tools such as DNS record manipulation and proper configuration of the policy table defined in RFC 3484. To provide automation in the management of traffic engineering, we analyzed the usage of two mechanisms to configure the policy table.This work has been partly supported by the European Union under the E-Next Project FP6-506869 and by the OPTINET6 project TIC-2003-09042-C03-01.Publicad

New trends in education: the use of ICT in different ways

In the 21st century and due to the exponential growth of the Internet and Information and Communication Technologies (ICT), people live in a technological age, in all areas and in all contexts, we have daily contact with technology, with access to Information. This dynamic requires a constant update of the services and technological tools that change the method that we study, work, communicate and socialize on an unprecedented scale. These constant changes force everyone, regardless of age, gender or profession, to possess a range of functional and critical thinking skills, such as information literacy, media literacy and technological literacy. The evolution of technologies, forces the promoters of education, to always be aware of the changes that society is introducing outside the classroom. Today, students don't have the same pattern as before, regardless of age, they are very active and are no longer the same introverted child who studied a few years ago in the classroom. According to this, students are eager for different forms of motivation inside and outside the classroom, they need the learning and teaching process to move along with changes in society and ICT. To ensure the success of today's students, it is important to provide them with the technological skills to make the correct use of ICTs, to perform tasks essential to their learning process, such as researching and selecting information, creating content, information sharing, use of collaboration tools or environment simulation tools. The main objective of this chapter is to show how ICT tools that can be used in educational environments to help students, helping them develop key skills in their training process, is also relevant to show how these tools can help teachers achieve these goals in daily activities with their students

Soil and dust mites. Tiny animals close to us

Los ácaros son uno de los grupos más antiguo, diverso y numeroso de artrópodos que habitan la Tierra. Los ácaros han conquistado diferentes ambientes, algunas especies están asociadas o dependen de un organismo para vivir, mientras que otros son de vida libre. Por ejemplo, los ácaros del suelo y del polvo han desarrollado estructuras morfológicas muy diferentes que les permiten colonizar ambientes muy contrastados y acceder a diferentes recursos alimenticios. Se sugieren dos actividades académicas para que los estudiantes observen los ácaros bajo el microscopio.Mites are one of the most ancient, diverse and numerous arthropod groups that inhabit the Earth. Mites have conquered different environments, some species are associated or dependent of an organism for survival, while others are free-living. For example, soil and dust mites have developed very different morphological structures that allow them to colonize very contrasting environments and access to different food sources. We suggest two academic activities for students to observe mites under the microscope

Enabling Practical IPsec authentication for the Internet

On the Move to Meaningful Internet Systems 2006: OTM 2006 Workshops (First International Workshop on Information Security (IS'06), OTM Federated Conferences and workshops). Montpellier, Oct,/Nov. 2006There is a strong consensus about the need for IPsec, although its use is not widespread for end-to-end communications. One of the main reasons for this is the difficulty for authenticating two end-hosts that do not share a secret or do not rely on a common Certification Authority. In this paper we propose a modification to IKE to use reverse DNS and DNSSEC (named DNSSEC-to-IKE) to provide end-to-end authentication to Internet hosts that do not share any secret, without requiring the deployment of a new infrastructure. We perform a comparative analysis in terms of requirements, provided security and performance with state-of-the-art IKE authentication methods and with a recent proposal for IPv6 based on CGA. We conclude that DNSSEC-to-IKE enables the use of IPsec in a broad range of scenarios in which it was not applicable, at the price of offering slightly less security and incurring in higher performance costs.Universidad de Montpellier IIPublicad

TBL1 is required for the mesenchymal phenotype of transformed breast cancer cells

The epithelial-to-mesenchymal transition (EMT) and its reversion (MET) are related to tumor cell dissemination and migration, tumor circulating cell generation, cancer stem cells, chemoresistance, and metastasis formation. To identify chromatin and epigenetic factors possibly involved in the process of EMT, we compare the levels of expression of epigenetic genes in a transformed human breast epithelial cell line (HMEC-RAS) versus a stable clone of the same cell line expressing the EMT master regulator ZEB1 (HMEC-RAS-ZEB1). One of the factors strongly induced in the HMEC-RAS-ZEB1 cells was Transducin beta-like 1 (TBL1), a component of the NCoR complex, which has both corepressor and coactivator activities. We show that TBL1 interacts with ZEB1 and that both factors cooperate to repress the promoter of the epithelial gene E-cadherin (CDH1) and to autoactivate the ZEB1 promoter. Consistent with its central role, TBL1 is required for mesenchymal phenotypes of transformed breast epithelial and breast cancer cell lines of the claudin-low subtype. Importantly, a high expression of the TBL1 gene correlates with poor prognosis and increased proportion of metastasis in breast cancer patients, indicating that the level of TBL1 expression can be used as a prognostic marker.Ministerio de Economía y Competitividad BFU2014-53543-P, BFU2017-85420-RJunta de Andalucía BIO-32

Embedded optimization-based controllers for industrial processes

© 20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Due to the growth of computational capabilities and the proliferation of field-programmable gate arrays (FPGA), the utilization of model predictive control (MPC) for embedded applications in the industry has become a possibility and a fact. This paper presents and discusses the possibilities of the use of online MPC, embedded in an educational device from National Instruments, using two different optimization algorithms and code generators, which have come out in recent years by the academia: CVXGEN, which implements a primal-dual interior-point algorithm, and qpOASES, which relies on the online active-set strategy algorithm. Both algorithms have been tested both in simulation and in real-time experimentation to control a four-tank pilot plant.Peer ReviewedPostprint (author's final draft

Preparación y caracterización de un material compuesto poli(uretano)/hidroxiapatita mediante separación de fases

Recientemente se han utilizado materiales porosos para la regeneración del tejido óseo, uno de los aspectos más importantes es contar con una morfología controlada la cual sirva como base y guía para el crecimiento del tejido. En este trabajo se han preparado poliuretanos y compositos poliuretano/hidroxiapatita por una separación de fase inducida térmicamente; por medio de la cual se pudieron producir materiales porosos con una morfología controlada y reproducible. La microestructura fue controlada por la variación en la concentración del polímero, temperatura de congelamiento, relación solvente/no solvente y co-solvente utilizado. Usando está técnica se pueden obtener materiales con un tamaño de poros desde unas cuantas micras hasta 200 mm. Debido a la porosidad interconectada y a la bioactividad que proporciona la hidroxiapatita pueden ser una alternativa para la regeneración del tejido óseo.Peer Reviewe