Discurso pronunciado por el Excmo. Sr. D. Rafael Portaencasa Baeza, Rector Magnífico de la Universidad Politécnica de Madrid, en el Acto celebrado con motivo de la festividad de Santo Tomás de Aquino e investidura de Doctor Honoris Causa del Excmo. Sr. D. Juan Antonio Samaranch 1989-90

Discurso pronunciado por D. Rafael Portaencasa, en calidad de Rector de la UPM, en el acto celebrado con motivo de la festividad de Santo Tomás de Aquino y la investidura de Doctor "Honoris Causa" de D. Juan Antonio Samaranch. En sus palabras el Rector resume los principales hitos acaecidos en esta universidad madrileña durante el curso 1989-1990 y agradece a Samaranch su presencia y las palabras que ha pronunciado durante el acto.

Network convergence and QoS for future multimedia services in the VISION project

The emerging use of real-time 3D-based multimedia applications imposes strict quality of service (QoS) requirements on both access and core networks. These requirements and their impact to provide end-to-end 3D videoconferencing services have been studied within the Spanish-funded VISION project, where different scenarios were implemented showing an agile stereoscopic video call that might be offered to the general public in the near future. In view of the requirements, we designed an integrated access and core converged network architecture which provides the requested QoS to end-to-end IP sessions. Novel functional blocks are proposed to control core optical networks, the functionality of the standard ones is redefined, and the signaling improved to better meet the requirements of future multimedia services. An experimental test-bed to assess the feasibility of the solution was also deployed. In such test-bed, set-up and release of end-to-end sessions meeting specific QoS requirements are shown and the impact of QoS degradation in terms of the user perceived quality degradation is quantified. In addition, scalability results show that the proposed signaling architecture is able to cope with large number of requests introducing almost negligible delay.

Ulmus laevis in the Iberian Peninsula: a review of its ecology and conservation

European white elm (Ulmus laevis Pallas) populations are scarce, small and fragmented in the Iberian Peninsula. Due to these characteristics the indigenous status of the species in the region has been questioned, whilst the species? role in Iberian riparian forest ecology has been neglected. Herein we review past studies regarding this species? distribution and ecology in the Iberian Peninsula, with special emphasis on the establishment of conservation priorities. We first present a collection of palaeogeographic, historic and genetic data suggesting that the Iberian Peninsula was a glacial refuge for U. laevis. Secondly, we analyse U. laevis distribution in relation to soil physico- chemical properties and water availability in Spain. Following this, we focus on the reproductive biology of the species, and investigate the effect of masting and empty seed production on predation and regeneration establishment. Finally, based on this knowledge, we propose conservation policies for U. laevis in the Iberian Peninsula.