Programant supercomputadors

Peer Reviewe

"El Sol de Burkina Fasso": un complejo educativo integral sostenible

En la presente comunicación se presenta el diseño del complejo educativo “La Luz de Burkina Faso” que se ha desarrollado en base a tres Proyectos Finales de Carrera de estudiantes de Ingeniería Industrial de la Escola Tècnica Superior d’Enginyeries Industrial i Aeronàutica de Terrassa (Universitat Politècnica de Catalunya).Preprin

An edge-based strategy for smart advertising

Smart advertising creates awareness about some offer with a more direct, personalized and interactive focus. In this area, AROUND is a social network aimed at providing smart advertising to suggest appealing business to their customers and friends. The AROUND system is supported by a sophisticated recommender system, which considers not only the customers historical behaviours, but also their current mood and accurate location. In such smart recommendation systems, the response time for the personalized advertising is critical for a successful users’ quality of experience. In this research work we first evaluate the current performance of the AROUND system in terms of processing and communication times considering that, nowadays, this social network has more than 3 million users. The current implementation of the system relies on the deployment of a network of beacons, and uses a domestic cloud provider as the main infrastructure. We show that when the number of concurrent requests becomes too high, the response time faces some limitations. In order to address this issue, we discuss several alternatives, and propose the use of an edge-based strategy as a solution for fast response time. In the experimental section, we measure the performance of the AROUND system, both in our current infrastructure at the cloud and with an edge-based approach, and show the additional advantages of leveraging the edge-based strategy even in the case of overloading the cloud capacity.This work has been supported by the Spanish Ministry of Science, Innovation and Universities and by the European Regional Development Fund (FEDER) under contract RTI2018-094532-B-I00.Peer ReviewedPostprint (author's final draft

Essentiality of managing the resource information in the coordinated fog-to-cloud paradigm

This is the peer reviewed version of the following article: Sengupta, S, Garcia, J, Masip‐Bruin, X. Essentiality of managing the resource information in the coordinated fog‐to‐cloud paradigm. Int J Commun Syst. 2019, which has been published in final form at https://doi.org/10.1002/dac.4286. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.Fog-to-cloud (F2C) computing is an emerging computational platform. By combing the cloud, fog, and IoT, it provides an excellent framework for managing and coordinating the resources in any smart computing domain. Efficient management of these kinds of diverse resources is one of the critical tasks in the F2C system. Also, it must be considered that different types of services are offered by any smart system. So, before managing these resources and enabling the various types of services, it is essential to have some comprehensive informational catalogue of resources and services. Hence, after identifying the resource and service-task taxonomy, our main aim in this paper is finding out a solution for properly organizing this information over the F2C system. For that purpose, we are proposing a modified F2C framework where all the information is distributively stored near to the edge of the network. Finally, by presenting some experimental results, we evaluate and validate the performance of our proposing framework.This work has been supported by the Spanish Ministry of Science, Innovation and Universities and by the European Regional Development Fund (FEDER) under contract RTI2018-094532-B-I00 and by the H2020 European Union mF2C project with reference 730929.Peer ReviewedPostprint (published version

El Desarrollo de la competencia sostenibilidad y compromiso social en la Facultat d’Informàtica de Barcelona

En este artículo se presenta una propuesta para desarrollar la competencia “Sostenibilidad y Compromiso Social” (SyCS) en estudios superiores de informática. La propuesta se basa en proporcionar al profesorado formación general en SyCS (y en particular en la relación entre ésta y la informática), material relacionado con SyCS para cada materia y métodos de evaluación de la competencia. Los autores defienden introducir esta competencia en una gran mayoría de las asignaturas, frente a otras propuestas que defienden asignaturas específicas dentro del plan de estudios. Se propone también la existencia de un mecanismo global de coordinación y evaluación de la competencia. Finalmente, se detalla la introducción de SyCS en el Grado en Ingeniería Informática de la Facultat d’Informàtica de Barcelona (FIB) y se muestran algunos ejemplos de cómo tratar SyCS en las asignaturas.Peer Reviewe

SFDDM: a secure distributed database management in combined fog-to-cloud systems

© 2019 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.Technological revolutions have greatly increased the use of IoT devices for our daily life. Driving the fact that everything surrounding us is getting connected what turns into an unstoppable increase in the amount of data produced. This data represents the state of diverse environmental events and helps to control a large set of distinct activities. So, accurate and secure management of this data is essential for any computing platform. Moreover, in order to provide real-time services in a distributed system (i.e., smart city), the data should be properly and securely managed. It is well known that shifting these tasks to the edge (i.e., near to the end users), highly facilitates these two objectives. The recently proposed Fog-to-Cloud (F2C) model is intended to enable data processing near to the edge, which helps to get better latency-sensitive services. However, some challenges remain to accurately and securely manage this data over the system, mainly due to the distributed F2C nature. Thus, considering these facts and challenges, in this paper we propose an architectural solution aimed at building a secure distributed database for F2C systems. Then, considering a real-case scenario, we perform some tests to measure the performance of our proposing schema. Finally, by comparing the performance between traditional cloud, fog/edge based execution model and our proposing SFDDM, we validate the effectiveness of our proposing schema.This work has been supported by the Spanish Ministry of Science, Innovation and Universities and the European Regional Development Fund (FEDER) under contract RTI2018- 094532-B-I00, and by the H2020 European Union mF2C project with reference 730929.Peer ReviewedPostprint (author's final draft

Fog-to-Cloud (F2C) Data Management for Smart Cities

Smart cities are the current technological solutions to handle the challenges and complexity of the growing urban density. Traditionally, smart city resources management rely on cloud based solutions where sensors data are collected to provide a centralized and rich set of open data. The advantages of cloudbased frameworks are their ubiquity, as well as an (almost) unlimited resources capacity. However, accessing data from the cloud implies large network traffic, high latencies usually not appropriate for real-time or critical solutions, as well as higher security risks. Alternatively, fog computing emerges as a promising technology to absorb these inconveniences. It proposes the use of devices at the edge to provide closer computing facilities and, therefore, reducing network traffic, reducing latencies drastically while improving security. We have defined a new framework for data management in the context of a smart city through a global fog to cloud resources management architecture. This model has the advantages of both, fog and cloud technologies, as it allows reduced latencies for critical applications while being able to use the high computing capabilities of cloud technology. In this paper, we present the data acquisition block of our framework and discuss the advantages. As a first experiment, we estimate the network traffic in this model during data collection and compare it with a traditional real systemPeer ReviewedPostprint (published version

Un modelo de threads reactivos usuario-kernel para aplicaciones Internet de alto desempeño

En este trabajo se presenta un modelo de threads usuario-kernel de propósito general, eficiente, altamente escalable, y orientado a la construcción de aplicaciones Internet de alto desempeño que requieren crear cientos de threads y mantener igual número de conexiones simultáneas (p.e. servidores Web y servidores proxy). El modelo incluye un mecanismo de planificación reactiva que permite gestionar en forma implícita operaciones de I/O no bloqueantes sobre threads de usuario cooperativos.Postprint (author’s final draft

Proyecto IPSO: síntesis de experiencias de incentivos en sostenibilidad

El proyecto IPSO se ha creado por iniciativa del Comisionado para el desarrollo sostenible de la Universitat Politècnica de Catalunya (UPC) y tiene como finalidad proponer un conjunto de medidas para incentivar la introducción de criterios de sostenibilidad en la actividad académica del Personal Docente e Investigador (PDI) de la universidad. La UPC, mediante sus dos planes de medio ambiente para los periodos 1996-2001 y 2001-2006, ha sido pionera en su compromiso con el medio ambiente. Al finalizar el segundo plan, se ha decidido dar un salto cualitativo y apostar por una estrategia global que integre las actividades formativas, de investigación e institucionales, asumiendo el liderazgo que le corresponde en la obtención de una sociedad más sostenible. Este compromiso, que se concreta en la Declaración de Sostenibilidad de la UPC, fue aprobado por el Claustro de la UPC el 18 de febrero de 2008. Aunque en la UPC se están llevando a cabo múltiples iniciativas docentes y de investigación en el ámbito de la sostenibilidad, existe la percepción de qué estas no están debidamente reconocidas en el funcionamiento cotidiano de la Universidad. Se ha iniciado, por lo tanto, una primera tarea de recopilación de información, experiencias y propuestas de reconocimiento de las actividades desarrolladas alrededor del Desarrollo Humano Sostenible (DHS) y de las diferentes perspectivas que contempla. En este artículo se presenta una primera síntesis de resultados, tanto de la UPC como de otros referentes nacionales e internacionales, que deberá servir como base para elaborar un documento de propuestas que permita a la Universidad definir una estrategia de mejora del compromiso institucional hacia la sostenibilidadPeer Reviewe

Un modelo de threads reactivos usuario-kernel para Java

En este trabajo se presenta un modelo de threads usuario-kernel para Java, eficiente, altamente escalable, y orientado a la construcción de aplicaciones Internet de alto desempeño que requieren crear miles de threads y mantener igual número de conexiones simultáneas (p.e. servidores Web y servidores proxy). El modelo incluye un mecanismo de planificación reactiva que permite gestionar en forma implícita operaciones de I/O no bloqueantes sobre threads de usuario cooperativos.Postprint (author’s final draft