Sistemas de pagos electrónicos

Peer Reviewe

Sistemas de pagos electrónicos

Peer Reviewe

Montar un punto de acceso inalámbrico 802.11 en Linux

La gente se mueve, las redes no. Estas dos sentencias definen más que nada la explosión de las redes inalámbricas de área local o WLAN (WirelessLocalArea Network). En unos pocos años el precio de los dispositivos WLANha bajado lo suficiente como para que se plantee su adquisición para usos domésticos. Aun así el precio del punto de acceso o AP (Access Point) sigue siendo elevado, y en la mayoría de casos su capacidad sobrepasa los pequeños requerimientos de una red inalámbrica doméstica. En este artículo explicamos como montar un AP inalámbrico con un ordenador, una tarjeta WLAN y software de código libre.Peer Reviewe

Navegar seguro por Internet

Peer Reviewe

Estudio práctico de mecanismos de seguridad en dispositivos Android

Android climbed up to 80 percent of the smartphone and mobile devices market share. One of the key aspects for the acceptance of a mobile OS is the security degree the user perceives from the system. In this article, we explore some of the important security mechanisms implemented in Google Android through the study of several recent vulnerabilities. Particularly, we discuss a recent security issue in WhatsApp, the dangers of connecting devices to external machines and the security of current mechanisms for access control. We describe these vulnerabilities through in-lab proof-of-concepts. The experience learned from these cases is used to propose better practices for improving the security of the system.Este trabajo se ha financiado en parte por los proyectos TAMESIS (TEC2011-22746) y ARES (CSD2007-00004)

e-Mazing - Juego de autoaprendizaje en terminales móviles

¿Te gustan los juegos? En este artículo se describirá el resultado de un Proyecto de Final de Carrera de la EPSC: un videojuego educativo para teléfonos móviles. Los juegos y más concretamente los videojuegos, pueden ser herramientas muy potentes de aprendizaje, debido a la alta capacidad de atención y concentración que muestra el usuario durante su curso. Siendo uno de los propósitos llegar a un público amplio y heterogéneo, se ha escogido el teléfono móvil como plataforma de la aplicación, por su gran penetración en nuestra vida cotidiana, ya que presenta la posibilidad de usarlo en cualquier momento y lugar. Estos son los principios de e-Mazing. Primero, se desarrollará ePeer Reviewe

Knowledge sharing in the health scenario

The understanding of certain data often requires the collection of similar data from different places to be analysed and interpreted. Interoperability standards and ontologies, are facilitating data interchange around the world. However, beyond the existing networks and advances for data transfer, data sharing protocols to support multilateral agreements are useful to exploit the knowledge of distributed Data Warehouses. The access to a certain data set in a federated Data Warehouse may be constrained by the requirement to deliver another specific data set. When bilateral agreements between two nodes of a network are not enough to solve the constraints for accessing to a certain data set, multilateral agreements for data exchange are needed. We present the implementation of a Multi-Agent System for multilateral exchange agreements of clinical data, and evaluate how those multilateral agreements increase the percentage of data collected by a single node from the total amount of data available in the network. Different strategies to reduce the number of messages needed to achieve an agreement are also considered. The results show that with this collaborative sharing scenario the percentage of data collected dramaticaly improve from bilateral agreements to multilateral ones, up to reach almost all data available in the network.Peer ReviewedPostprint (published version

A methodology to introduce sustainability into the Final Year Project to foster sustainable engineering projects

The introduction of sustainability skills into higher education curricula is a natural effect of the increasing importance of sustainability in our daily lives. Topics like green computing, sustainable design or environmental engineering have become part of the knowledge required by today’s engineers. Furthermore, we strongly believe that the introduction of this skill will eventually enable future engineers to develop sustainable products, services and projects. The Final Year Project is the last academic stage facing students and a step towards their future professional engineering projects. As such, it constitutes a rehearsal for their professional future and an ideal opportunity for reflecting on whether their Final Year Project is sustainable or not, and to what extent. It also provides a good tool for reviewing the lessons learned about sustainability during the degree course and for applying them in a holistic and integrated way. In this paper, we present a guide that allows both students and advisors to think carefully about the sustainability of engineering projects, in particular the Final Year Project.Postprint (author’s final draft

Effectiveness of Direct Laser Interference Patterning and Peptide Immobilization on Endothelial Cell Migration for Cardio-Vascular Applications: An In Vitro Study

Endothelial coverage of an exposed cardiovascular stent surface leads to the occurrence of restenosis and late-stent thrombosis several months after implantation. To overcome this difficulty, modification of stent surfaces with topographical or biochemical features may be performed to increase endothelial cells’ (ECs) adhesion and/or migration. This work combines both strategies on cobalt-chromium (CoCr) alloy and studies the potential synergistic effect of linear patterned surfaces that are obtained by direct laser interference patterning (DLIP), coupled with the use of Arg-Gly-Asp (RGD) and Tyr-Ile-Gly-Ser-Arg (YIGSR) peptides. An extensive characterization of the modified surfaces was performed by using AFM, XPS, surface charge, electrochemical analysis and fluorescent methods. The biological response was studied in terms of EC adhesion, migration and proliferation assays. CoCr surfaces were successfully patterned with a periodicity of 10 µm and two different depths, D (≈79 and 762 nm). RGD and YIGSR were immobilized on the surfaces by CPTES silanization. Early EC adhesion was increased on the peptide-functionalized surfaces, especially for YIGSR compared to RGD. High-depth patterns generated 80% of ECs’ alignment within the topographical lines and enhanced EC migration. It is noteworthy that the combined use of the two strategies synergistically accelerated the ECs’ migration and proliferation, proving the potential of this strategy to enhance stent endothelialization

Effectiveness of Direct Laser Interference Patterning and Peptide Immobilization on Endothelial Cell Migration for Cardio-Vascular Applications: An In Vitro Study

Endothelial coverage of an exposed cardiovascular stent surface leads to the occurrence of restenosis and late-stent thrombosis several months after implantation. To overcome this difficulty, modification of stent surfaces with topographical or biochemical features may be performed to increase endothelial cells’ (ECs) adhesion and/or migration. This work combines both strategies on cobalt-chromium (CoCr) alloy and studies the potential synergistic effect of linear patterned surfaces that are obtained by direct laser interference patterning (DLIP), coupled with the use of Arg-Gly-Asp (RGD) and Tyr-Ile-Gly-Ser-Arg (YIGSR) peptides. An extensive characterization of the modified surfaces was performed by using AFM, XPS, surface charge, electrochemical analysis and fluorescent methods. The biological response was studied in terms of EC adhesion, migration and proliferation assays. CoCr surfaces were successfully patterned with a periodicity of 10 µm and two different depths, D (≈79 and 762 nm). RGD and YIGSR were immobilized on the surfaces by CPTES silanization. Early EC adhesion was increased on the peptide-functionalized surfaces, especially for YIGSR compared to RGD. High-depth patterns generated 80% of ECs’ alignment within the topographical lines and enhanced EC migration. It is noteworthy that the combined use of the two strategies synergistically accelerated the ECs’ migration and proliferation, proving the potential of this strategy to enhance stent endothelialization