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    • Contributions to Libration Orbit Mission Design using Hyperbolic Invariant Manifolds 

      Canalias Vila, Elisabet (Universitat Politècnica de Catalunya, 2007-07-24)
      Tesi
      Accés obert
      Aquesta tesi doctoral està emmarcada en el camp de l'astrodinàmica. Presenta solucions a problemes identificats en el disseny de missions que utilitzen òrbites entorn dels punts de libració, fent servir la teoria de sistemes ...

    • Contributions to LPV control under time-varying saturations 

      Ruiz Royo, Adrián (Universitat Politècnica de Catalunya, 2023-11-20)
      Tesi
      Accés restringit per acord de confidencialitat
      (English) This thesis presents contributions to the state-of-the-art in the field of gain-scheduling control, with special emphasis on linear parameter-varying (LPV) systems and the presence of time-varying saturations. ...

    • Contributions to multi-purpose GNSS positioning to support multi-frequency and multi-constellation with high accuracy and integrity 

      Ibáñez Segura, Deimos (Universitat Politècnica de Catalunya, 2023-10-23)
      Tesi
      Accés obert
      (English) Global Navigation Satellite System (GNSS) have revolutionized location and timing technologies due to their low cost and wide availability. Initially, GNSS was limited to the american Global Positioning System ...

    • Contributions to nanophotonics: linear, nonlinear and quantum phenomena 

      Roque Fernández, Pablo Manuel de (Universitat Politècnica de Catalunya, 2022-10-18)
      Tesi
      Accés obert
      (English) Nanophotonics can be defined as the science and technology studying the control optical fields at the nanoscale and their interaction with matter. In order to spatially control such fields we would need structures ...

    • Contributions to network planning and operation of Flex-Grid/SDM optical core networks 

      Rumipamba Zambrano, Rubén Darío (Universitat Politècnica de Catalunya, 2019-03-14)
      Tesi
      Accés obert
      The ever demanding bandwidth requirements for supporting emerging telecom services such as ultra-high-definition video streaming, cloud computing, connected car, virtual/augmented reality, etc., bring to the fore the ...

    • Contributions to new challenges in radiotherapy : from small field dosimetry to stereotactic body radiation therapy 

      Puxeu Vaqué, Josep (Universitat Politècnica de Catalunya, 2015-12-22)
      Tesi
      Accés obert
      The use of small Fields has substantially increased in radiotherapy during recent years mainly due to expansion in the use of modulated techniques which are also used at some institutions for Stereotactic Body Radiotherapy ...

    • Contributions to optimal detection in OTDM and OCDMA optical receivers 

      Yazdani, Arash (Universitat Politècnica de Catalunya, 2016-07-07)
      Tesi
      Accés obert
      Recent developments in optical communication systems have increased the performance of optical networks. Low attenuation fiber optics, high spectral purity lasers and optical amplifiers, among others, are systems that have ...

    • Contributions to presence-based systems for deploying ubiquitous communication services 

      Beltrán Martínez, María Victoria (Universitat Politècnica de Catalunya, 2011-12-16)
      Tesi
      Accés obert
      Next-Generation Networks (NGNs) will converge the existing fixed and wireless networks. These networks rely on the IMS (IP Multimedia Subsystem), introduced by the 3GPP. The presence service came into being in instant ...

    • Contributions to prognostics and health-aware control of dynamic systems 

      Khoury, Boutrous (Universitat Politècnica de Catalunya, 2023-03-24)
      Tesi
      Accés obert
      (English) Maintenance is indispensable in every industry that uses machines and is inevitable regardless of the attention paid to it. The cumulative effect of its neglect or a non-optimized approach is a long or short-term ...

    • Contributions to provide a QoS-aware self-configured framework for video-streaming services over ad hoc networks 

      Mezher, Ahmad Mohamad (Universitat Politècnica de Catalunya, 2016-04-22)
      Tesi
      Accés obert
      Ad hoc networks have attracted much attention from the research community over the last years and important technical advances have risen as a consequence. These networks are foreseen as an important kind of next generation ...

    • Contributions to QoS and energy efficiency in wi-fi networks 

      Camps Mur, Daniel (Universitat Politècnica de Catalunya, 2012-01-19)
      Tesi
      Accés obert
      The Wi-Fi technology has been in the recent years fostering the proliferation of attractive mobile computing devices with broadband capabilities. Current Wi-Fi radios though severely impact the battery duration of these ...

    • Contributions to radio frequency interference detection and mitigation in Earth observation 

      Forte Véliz, Giuseppe Francesco (Universitat Politècnica de Catalunya, 2014-06-26)
      Tesi
      Accés obert
      Radio Frequency Interference (RFI) is the most common problem for electronic measuring systems. The presence of those electromagnetic waves can harm the measurements taken from very sensitive instruments, like microwave ...

    • Contributions to record linkage for disclosure risk assessment 

      Nin Guerrero, Jordi (Consejo Superior de Investigaciones Científicas (CSIC), 2009-10-15)
      Llibre
      Accés restringit per política de l'editorial
      This book is about reidentification methods, and, more especifically, about record linkage. This study is motivated on the need to assess in an accurate way the risk of disclosure within the fields of privacy preserving ...

    • Contributions to rework prevention in construction projects 

      Macarulla Martí, Marcel (Universitat Politècnica de Catalunya, 2013-12-17)
      Tesi
      Accés obert
      Literature usually suggests that construction organization can reduce the costs derived from rework implementing quality management systems. Most common challenges and obstacles that construction organizations face during ...

    • Contributions to routing scalability and QoS assurance in cloud data transport networks based on the recursive internetwork architecture 

      León Gaixas, Sergio (Universitat Politècnica de Catalunya, 2018-06-29)
      Tesi
      Accés obert
      With an increasing number of devices and heterogeneous distributed applications, it is becoming evident that service delivered by the current Internet fall short to supply the actual Quality of Service (QoS) requirements ...

    • Contributions to satellite subsystem models and communications link emulation 

      Romero Aguirre, Antonio (Universitat Politècnica de Catalunya, 2022-07-06)
      Treball Final de Grau
      Accés obert
      During last years, space missions have evolved from monolithic spacecrafts architectures, to distributed ones, which are known as Distribute Satellite Systems (DSS). This spacecraft architecture has changed the space ...

    • Contributions to secret sharing and other distributed cryptosystems 

      Ruiz Rodríguez, Alexandre (Universitat Politècnica de Catalunya, 2013-07-22)
      Tesi
      Accés obert
      The present thesis deals with primitives related to the eld of distributed cryptography. First, we study signcryption schemes, which provide at the same time the functionalities of encryption and signature, where the ...

    • Contributions to security and privacy protection in recommendation systems 

      Vera del Campo, Juan Victoriano (Universitat Politècnica de Catalunya, 2012-10-29)
      Tesi
      Accés obert
      A recommender system is an automatic system that, given a customer model and a set of available documents, is able to select and offer those documents that are more interesting to the customer. From the point of view of ...

    • Contributions to simulation and emulation of Inter-Satellite Links 

      Dolz Puig, Arnau (Universitat Politècnica de Catalunya, 2022-07-06)
      Treball Final de Grau
      Accés obert
      Recently, there has been a paradigm shift in space missions. They no longer rely on a single satellite to achieve all the objectives of a mission. Responsibility is shared between devices that can communicate and share ...

    • Contributions to the 3D ionospheric sounding with GPS data 

      García Fernández, Miquel (Universitat Politècnica de Catalunya, 2004-03-15)
      Tesi
      Accés obert
      La tesi proposa una sèrie d'algoritmes destinats a obtenir informació del contingut d'electrons lliures presents a la ionosfera. El tipus de dades que s'utilitzaran seran bàsicament les corresponents a receptors de dades ...