Papers by PEDRO DE LA CONCHA
3D video technology has been on the rise in the last years, with abundant research advances accom... more 3D video technology has been on the rise in the last years, with abundant research advances accompanied by a widespread adoption by the film industry and an increasing importance in consumer electronics. On a related note, there is the concept of multiview video, which encompasses 3D video, and can be defined as a video stream composed of two or more views. Multiview video enables advanced video features such as stereoscopic video, free viewpoint video, improved eye contact through use of virtual views, or shared virtual environments. The purpose of this thesis is to address a major obstacle towards the use of multiview video in communication systems-the lack of support for this technology from existing signalling protocols, which makes it impossible to configure a multiview video session through standard means. Thus, our main objective is to extend the Session Initiation Protocol (SIP) to support the negotiation of multimedia sessions with multiview video streams. Our work can be summarized in three major contributions. In the first place, we have defined a signalling extension for the configuration of SIP sessions with 3D video. This extension changes the Session Description Protocol (SDP) to introduce a new media-level attribute and a new type of decoding dependency, which help describe the 3D video formats that can be used in a session, and the relationship between video streams composing a 3D video stream. The second contribution consists in a SIP extension to handle the signalling of video conferences with multiview video streams. Two new SIP event packages are defined to describe the capabilities and topology of conferencing terminals, on the one hand, and the spatial configuration and stream mapping of a conference, on the other. A way to integrate the exchange of this information into the initiation of a SIP conference is also described. For the third and final contribution, we introduce the concept of conference virtual space, as a coordinate system where all relevant objects in a conference (such as capture devices, displays, and users) are included. We explain how the virtual space relates to conference features such as eye contact, video scale and spatial faithfulness, and provide guidance on how to determine the features of a conference through virtual space analysis, and on the generation of virtual spaces as part of conference configuration.
This thesis research will be based on the trajectory mission design and navigation design for pro... more This thesis research will be based on the trajectory mission design and navigation design for prospective future missions to the Triangular Lagrange Points L5 and L4 in the Sun-Earth and Earth-Moon systems. The research proposed here will be divided into four parts. ❧ The first problem will be devoted to studying the circular restricted three-body problem (CRTBP) in the Sun-Earth system. With this model, we will generate potential optimized orbit solutions in the planar CRTBP and also in three-dimensional orbits in order to study the Sun above the ecliptic plane. Orbit determination analysis will also be examined using different orbit determination methods. Finally, we will analyze the stability of the trajectories and their stationkeeping requirements. ❧ The second part of this thesis will deal with the bicircular problem (BCP) in the Earth-Moon system. As in the work on the CRTBP, we will understand and analyze the stability of the different types of periodic orbits (quasi-periodi...
Unlike explicit cartel agreements, the exchange of commercially sensitive information between com... more Unlike explicit cartel agreements, the exchange of commercially sensitive information between competitors is a very complex and controversial subject within the European Competition Law. This is largely because this type of practice can produce not only anticompetitive but also procompetitive effects. Thus, a thorough assessment of its restrictive nature on competition requires a case-by-case examination, including the characteristics of the market, the nature of the information and how this one is exchanged within the specific market context, as well as its potential beneficial effects. In addition, any claim on the existence of a negative harmful impact on the market should be tested against empirical evidence. The recent experience in Spain suggests that the Competition Authority has not conducted such an analysis or followed an appropriate methodology, since they only identified a set of factors characterizing the exchanges in order to reach its conclusions. This lack of rigor c...
Anuario De La Competencia, 2014
Anuario De La Competencia, 2008
Jornadas De Ingenieria Telematica Jornadas De Ingenieria Telematica 28 10 2013 30 10 2013 Granada Espana, 2013
Proceedings of the 2nd International Workshop on Dependability Issues in Cloud Computing, 2013
The size and complexity of cloud environments make them prone to failures. The traditional approa... more The size and complexity of cloud environments make them prone to failures. The traditional approach to achieve a high dependability for these systems relies on constant monitoring. However, this method is purely reactive. A more proactive approach is provided by online failure prediction (OFP) techniques. In this paper, we describe a OFP system for private IaaS platforms, currently under development, that combines different types of data input, including monitoring information, event logs, and failure data. In addition, this system operates at both the physical and virtual planes of the cloud, taking into account the relationships between nodes and failure propagation mechanisms that are unique to cloud environments.
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Papers by PEDRO DE LA CONCHA