The placement of regenerators in optical networks has become an active area of research during the last years. Given a set of lightpaths in a network G and a positive integer d, regenerators must be placed in such a way that in any lightpath there are no more than d hops without meeting a regenerator. In the talk I present a few optimization problems that arise within this framework. This is done by considering two cases: a. The cost function is the total number of regenerators placed at the nodes

Formally, the Internet inter-domain routing system is a collection of networks, their policies, peering relationships and organizational affiliations, and the addresses they advertize. It also includes components like Internet exchange points. By its very definition, each and every aspect of this system is impacted by BGP, the de-facto standard inter-domain routing protocol.

As wireless ad hoc networking becomes more and more popular and ad hoc networks are used for an increasing number of applications, the integration of these networks in today's Internet, still mostly organized as a set of interconnected fixed and wired networks, becomes a key research field in the computer networking domain.

Inter-domain traffic engineering is an important aspect of network operation both technically and economically. Traffic engineering the outbound direction is less problematic as routers under the control of the network operator are responsible for the way traffic leaves the network. The inbound direction is considerably harder as the way traffic enters a network is based on routing decisions in other networks.

A majority of ISPs (Internet Service Providers) support connectivity to the entire Internet by transiting their traffic via other providers. Although the transit prices per Mbps decline steadily, the overall transit costs of these ISPs remain high or even increase, due to the traffic growth. The discontent of the ISPs with the high transit costs has yielded notable innovations such as peering, content distribution networks, multicast, and peer-to-peer localization.

Why should I consider a future in research? What sort of opportunities does a PhD open up for me? What makes research in the science of networks such an exciting career choice? How can we ensure that the Internet can grow and adapt to ever-changing needs over the coming decades? What lies beyond the Internet? What inspires network research?

In this paper we design, characterize in closed-form, and evaluate a new index rule for Markovian time-varying channels, which gives rise to a simple opportunistic scheduling rule for flow-level scheduling in wireless downlink systems. For user channels we employ the Gilbert-Elliot model with a flow-level interpretation: the channel condition follows a general two-state Markov chain with distinct probabilities of finishing the flow transmission.

The Madrid Audiovisual Cluster is a member of the steering committee of BROADCAST, the professional forum for audiovisual technology, which this year is adopting a new approach: the event will experience a quantum leap from the traditional exhibition of products to the proposal of emerging solutions and contents. In this manner, BROADCAST aims to adapt to the specificities of the audiovisual technology industry today.

Within the framework of SIMO Network 2011, and in collaboration with Universities and Research Centers in Madrid, Enterprise Europe Network madri+d and Fundación para el Conocimiento madrimasd organize an international transfer technology day to promote the exchange of information amongst possible technological partners

On Sep 26th and 27th we organize a meeting of the EU project TREND. The research conducted in this project is in the field of energy efficient networking. The second day of the project is dedicated to several research talks by members of the project as well as some external speakers. Those interested in attending to these sessions are welcome to do so. The only requirement is to complete the registration form by Thursday, September 22nd