On the feasibility of collaborative green data center ecosystems

The increasing awareness of the impact of the IT sector on the environment, together with economic factors, have fueled many research efforts to reduce the energy expenditure of data centers. Recent work proposes to achieve additional energy savings by exploiting, in concert with customers, service workloads and to reduce data centers’ carbon footprints by adopting demand-response mechanisms between data centers and their energy providers. In this paper, we debate about the incentives that customers and data centers can have to adopt such measures and propose a new service type and pricing scheme that is economically attractive and technically realizable. Simulation results based on real measurements confirm that our scheme can achieve additional energy savings while preserving service performance and the interests of data centers and customers.Peer ReviewedPostprint (author's final draft

Wireless ad hoc networks: an overview

This tutorial provides a general view on the research field of ad hoc networks. After a definition of the concept, the discussion concentrates on enabling technologies, including physical and medium access control layers, networking and transport issues. We find discussions on the adequacy of enabling technologies for wireless multihop communication, specifically in the case of the pervasive Bluetooth and IEEE 802.11. Then, a variety of dynamic routing protocols are presented and specific issues that are relevant in this context are highlighted. After a short discussion on TCP issues in this context, we look at power awareness, which is a very important issue in this scenario. Finally, we discuss proposals that aim at maintaining Service Level Agreements in isolated ad hoc networks and ad hoc networks connected to fixed networks

Per-Flow Service Differentiation via Virtual MAC

The support of quality of service in IEEE 802.11 requires adequate service differentiation. A distributed algorithm named Virtual Source can be used to monitor the channel passively and estimate parameters related to the quality of service. In this way the optimal packet rate and packet size for a concrete application can be chosen so that the delay and delay variance is minimal and thus it can be decided to establish or not a session. If these algorithms combine their functioning with the use of perflow differentiation, the differentiation effect between priority classes will be enhanced

Examen Final

Resolve

Examen Final

Resolve

Breast cancer detection using machine learning with thermograms in an edge computing scenario

The second cause of death in the world is cancer. Although breast cancer is the more common cause of death among women, the chance of survival can be increased by detecting cancer in the early stages. For this aim, there are different tests such as Magnetic Resonance Imaging (MRI), mammogram, ultrasound, thermogram and among these tests, the mammogram is the one which is used more frequently. Regarding the advantages and the results, which are achieved by thermogram, it can be a good alternative or complement for the mammogram if we can improve the weaknesses of the thermogram. For this reason, in this research, we work on a thermogram to see the possibility of having a good performance. On the other hand, we train another model by sending personal patients' information to see the effect of these data to improve the performance of breast cancer detection. In the end, we plan to separate the process between edge and core host to do the process faster, safer, and cost-effective.Peer ReviewedPostprint (author's final draft

Experiencia de trabajo en equipo multidisciplinar para la creación de un proyecto de ingeniería en créditos optativos en la EETAC

Este trabajo presenta la experiencia de una asignatura de proyectos de ingeniería relativamente nueva; este año en su cuarta edición ya tenemos datos suficientes para extraer conclusiones sobre la consecución de sus objetivos y la aceptación que ha recibido por parte de los estudiantes. La novedad de esta asignatura optativa es, por un lado, la heterogeneidad del perfil de los estudiantes que la cursan, que pueden ser de aeronáutica, telemática o sistemas de telecomunicación; y, por otra parte, la visión desde tres ópticas totalmente distintas de un proyecto de ingeniería, como es el desarrollo de un proyecto concreto, la propuesta de un proyecto europeo, y una visión de negocio de los proyectos de ingeniería.Postprint (author's final draft

Content distribution over IP: developments and challenges

This chapter focuses on the multimedia distribution over Internet IP under the auspices of the NoE Euro-NGI research project ”Routing in Overlay Networks (ROVER)”. The multimedia distribution is supported by several components such as services, content distribution chain, protocols and standards whilst Internet is used for content acquisition, management and delivery as well as an Internet Protocol Television (IPTV) infrastructure with QoS facilities. As the convergence between fixed and mobile services of wide and local area networks is also expected to take place in the home networking, this puts an extra burden on multimedia distribution, which requires the different types of wireless access solutions (e.g., WiMAX). In this context, the ROVER research project adopts the IP Multimedia Subsystem (IMS), which offers a wide range of multimedia services over a single IP infrastructure such as authentication and, for wireless services, roaming capabilities. The research project also considers overlay routing as an alternative solution for content distribution

On the feasibility of collaborative green data center ecosystems

The increasing awareness of the impact of the IT sector on the environment, together with economic factors, have fueled many research efforts to reduce the energy expenditure of data centers. Recent work proposes to achieve additional energy savings by exploiting, in concert with customers, service workloads and to reduce data centers’ carbon footprints by adopting demand-response mechanisms between data centers and their energy providers. In this paper, we debate about the incentives that customers and data centers can have to adopt such measures and propose a new service type and pricing scheme that is economically attractive and technically realizable. Simulation results based on real measurements confirm that our scheme can achieve additional energy savings while preserving service performance and the interests of data centers and customers.Peer Reviewe