Customizing Data-plane Processing in Edge Routers

While OpenFlow enables the customization of the control plane of a router, currently no solutions are available for the customization of the data plane. This paper presents a prototype that offers to third parties (even end-users) the possibility to install their own applications on the data plane of a router, particularly the ones operating at the edge of the network. This paper presents the motivation of the idea, the reason why we use OpenFlow even if it does not seem appropriate for the data plane, the architecture and the implementation of our prototype, and a first characterization of the system running in our la

NFV service dynamicity with a DevOps approach : demonstrating zero-touch deployment & operations

Next generation network services will be realized by NFV-based microservices to enable greater dynamics in deployment and operations. Here, we present a demonstrator that realizes this concept using the NFV platform built in the EU FP7 project UNIFY. Using the example of an Elastic Router service, we show automated deployment and configuration of service components as well as corresponding monitoring components facilitating automated scaling of the entire service. We also demonstrate automatic execution of troubleshooting and debugging actions. Operations of the service are inspired by DevOps principles, enabling quick detection of operational conditions and fast corrective actions. This demo conveys essential insights on how the life-cycle of an NFV-based network service may be realized in future NFV platforms

Nueva metodología docente en el Derecho Procesal

La entrada al Espacio Europeo de Educación Superior supone una modificación en las metodologías docentes que, tradicionalmente, se han utilizado en el sistema educativo español hasta la actualidad, donde mayoritariamente las lecciones se efectuaban mediante clases magistrales, con las que, la interacción profesor- alumno era, en muchas ocasiones, insuficiente. Este sistema metodológico es modificado por nuevas opciones de aprendizaje que favorecen una mayor interacción entre profesor y estudiante. Los nuevos métodos docentes deben permitir aumentar la eficacia en los procesos de formación de los titulados, pretendiendo lograr, de este modo, la armonización europea en cuanto a la formación superior. Uno de los principales objetivos que se pretenden conseguir con la utilización de estas metodologías se concreta en una mayor participación del alumno en el proceso de aprendizaje, que facilite la adquisición e interiorización de los conocimientos exigidos en cada materia. De esta forma, el estudiante debe adoptar un papel más activo durante sus estudios y, en especial, en su asistencia a las aulas de nuestras Universidades. El aprendizaje por módulos se configura como una alternativa metodológica que pretende estimular la creatividad del alumno, dejando que se enfrente al estudio directamente, y sea él quien analice los textos normativos, doctrinales y jurisprudenciales, y sea capaz de buscar la información necesaria para resolver problemas y redactar documentos jurídicos, asegurando que los alumnos se incorporen al mercado laboral con unas aptitudes y habilidades propias en las materias que han estudiado durante su educación superior. Fruto de esta nueva forma de enseñar- aprender, el estudiante a través de la adquisición de competencias y habilidades, puede ser evaluado de forma continua durante todo el curso académico por el docente, que de forma periódica y progresiva, examina el nivel de comprensión por parte de alumno en relación a las materias analizadas en clase

An Efficient Data Exchange Algorithm for Chained Network Functions

In-network function chaining often involves the deployment of multiple applications into a single, possibly multi-tenant, middlebox. This approach has gained much interest since new network paradigms, such as Software Defined Networking (SDN) and Network Function Virtualization (NFV), have been proposed to virtualize resources as well as network functions. In this scenario, it is very common to move data (e.g., packets) from an application to another by means of a switching module that is in charge of chaining network functions in the correct order, also ensuring an adequate level of isolation between any two virtualized components. With this purpose in mind, this paper proposes an efficient algorithm to handle the communication between the internal soft-switch and the heterogeneous network functions that are executed on the same server. Our proposal is designed with the aim of dealing with high speed packet processing, hence an extensive performance evaluation is also provided to prove the goodness of our solution in this context

Impact of DOI in a clinical SPECT/MRI system:asimulation study

A novel SPECT/MRI scanner has been modelled and tested here using Monte Carlo simulation software, SIMIND. The INSERT SPECT/MRI system faces challenges with event reconstruction due to photon depth of interaction. The novel SPECT system is subject to parallax errors due to its crystal size and slit aperture collimator. We present a simple measure of the DOI errors through SIMIND experiments; by modelling the DOI layers we are able to improve the reconstruction of projection data in the INSERT scanner. A set of capillary phantoms are simulated to explore the impact of DOI on the resolution of the scanner and establish corrections in the system's reconstruction

NFV service dynamicity with a DevOps approach : Insights from a use-case realization

This experience paper describes the process of leveraging the NFV orchestration platform built in the EU FP7 project UNIFY to deploy a dynamic network service exemplified by an elastic router. Elasticity is realized by scaling dataplane resources as a function of traffic load. To achieve this, the service includes a custom scaling logic and monitoring capabilities. An automated monitoring framework not only triggers elastic scaling, but also a troubleshooting process which detects and analyzes anomalies, pro-actively aiding both dev and ops personnel. Such a DevOps-inspired approach enables a shorter update cycle to the running service. We highlight multiple learnings yielded throughout the prototype realization, focussing on the functional areas of service decomposition and scaling; programmable monitoring; and automated troubleshooting. Such practical insights will contribute to solving challenges such as agile deployment and efficient resource usage in future NFV platforms

The Spanish SpaceWeather Service SeNMEs. A Case Study on the Sun-Earth Chain

Comunicación presentada en el Coimbra Solar Physics Meeting, 5-9 October 2015, Coimbra, PortugalThe Spanish Space Weather Service SeNMEs, www.senmes.es, is a portal created by the SRG-SW of the Universidad de Alcalá, Spain, to meet societal needs of near real-time space weather services. This webpage-portal is divided in different sections to fulfill users needs about space weather effects: radio blackouts, solar energetic particle events, geomagnetic storms and presence of geomagnetically induced currents. In less than one year of activity, this service has released a daily report concerning the solar current status and interplanetary medium, informing about the chances of a solar perturbation to hit the Earth’s environment. There are also two different forecasting tools for geomagnetic storms, and a daily ionospheric map. These tools allow us to nowcast a variety of solar eruptive events and forecast geomagnetic storms and their recovery, including a new local geomagnetic index, LDiñ, along with some specific new scaling. In this paper we also include a case study analysed by SeNMEs. Using different high resolution and cadence data from space-borne solar telescopes SDO, SOHO and GOES, along with ionospheric and geomagnetic data, we describe the Sun-Earth feature chain for the event.MINECO project AYA2013-47735PPeer reviewe

Nueva metodología docente en el Derecho Procesal

La entrada al Espacio Europeo de Educación Superior supone una modificación en las metodologías docentes que, tradicionalmente, se han utilizado en el sistema educativo español hasta la actualidad, donde mayoritariamente las lecciones se efectuaban mediante clases magistrales, con las que, la interacción profesor- alumno era, en muchas ocasiones, insuficiente. Este sistema metodológico es modificado por nuevas opciones de aprendizaje que favorecen una mayor interacción entre profesor y estudiante. Los nuevos métodos docentes deben permitir aumentar la eficacia en los procesos de formación de los titulados, pretendiendo lograr, de este modo, la armonización europea en cuanto a la formación superior. Uno de los principales objetivos que se pretenden conseguir con la utilización de estas metodologías se concreta en una mayor participación del alumno en el proceso de aprendizaje, que facilite la adquisición e interiorización de los conocimientos exigidos en cada materia. De esta forma, el estudiante debe adoptar un papel más activo durante sus estudios y, en especial, en su asistencia a las aulas de nuestras Universidades. El aprendizaje por módulos se configura como una alternativa metodológica que pretende estimular la creatividad del alumno, dejando que se enfrente al estudio directamente, y sea él quien analice los textos normativos, doctrinales y jurisprudenciales, y sea capaz de buscar la información necesaria para resolver problemas y redactar documentos jurídicos, asegurando que los alumnos se incorporen al mercado laboral con unas aptitudes y habilidades propias en las materias que han estudiado durante su educación superior.

Serum levels of heat shock protein 27 in patients with acute ischemic stroke

Expression of intracellular heat shock protein 27 (Hsp27) rises in the brain of animal models of cerebral ischemia and stroke. Hsp27 is also released into the circulation and the aim of the present study was to investigated if serum Hsp27 (sHsp27) levels are altered in patients with acute ischemic stroke. sHsp27 was measured in 15 patients with acute ischemic stroke and in 14 control subjects comparable for age, sex, and cardiovascular risk factors. In patients, measurements were performed at admission and 1, 2, and 30 days thereafter. At admission, mean sHsp27 values were threefold higher in patients than in controls. In patients, sHsp27 values dropped after 24 h, rose again at 48 h, and markedly declined at 30 days, indicating the presence of a temporal trend of sHsp27 values following acute ischemic stroke