Now showing items 1-20 of 376

    3D audio technologies : applications to sound capture, post-production and listener perception 

    Cengarle, Giulio (Date of defense: 2012-11-29)

    La llegada del sonido 3D está imponiendo cambios en varias etapas del flujo de trabajo, desde los sistemas de captación hasta las metodologías de postproducción y las configuraciones de altavoces. Esta tesis trata varios ...

    3D reconstruction for plastic surgery simulation based on statistical shape models 

    Ruiz Fernández, Guillermo (Date of defense: 2018-12-12)

    This thesis has been accomplished in Crisalix in collaboration with the Universitat Pompeu Fabra within the program of Doctorats Industrials. Crisalix has the mission of enhancing the communication between professionals ...

    3D reconstruction of the proximal femur and lumbar vertebrae from dual-energy x-ray absorptiometry for osteoporotic risk assessment 

    Whitmarsh, Tristan (Date of defense: 2012-09-25)

    In this thesis a method was developed to reconstruct both the 3D shape and the BMD distribution of bone structures from Dual-energy X-ray Absorptiometry (DXA) images. The method incorporates a statistical model built from ...

    3D subject-specific shape and density modeling of the lumbar spine from 2D DXA images for osteoporosis assessment 

    López Picazo, Mirella (Date of defense: 2019-03-19)

    Osteoporosis is the most common bone disease, with a significant morbidity and mortality caused by the increase of bone fragility and susceptibility to fracture. Dual Energy X-ray Absorptiometry (DXA) is the gold standard ...

    A Comprehensive study of arithmetic circuits and elliptic curves for efficient and scalable zero-knowledge proof systems 

    Bellés Muñoz, Marta (Date of defense: 2023-10-10)

    In recent years, zero-knowledge proofs have come to play a crucial role in distributed systems where there is no trust between the parties involved. Most popular proof systems are for the NP-complete language of arithmetic ...

    A computational approach to rhythm description - Audio features for the computation of rhythm periodicity functions and their use in tempo induction and music content processing 

    Gouyon, Fabien (Date of defense: 2005-11-30)

    Aquesta dissertació tracta del ritme musical. Més exactamente, tracta de programes informàtics que extreuen automàticament descripcions rítmiques a partir de senyals musicals d'àudio.<br/>Presentem nous algorismes per a ...

    A computational approach to studying interdependence in string quartet performance 

    Papiotis, Panagiotis (Date of defense: 2016-02-01)

    This dissertation proposes a computational data-driven methodology to measure music ensemble interdependence - the degree to which musicians interact and influence each other’s actions in order to achieve a shared goal - ...

    A cross-layer mechanism for QoS improvements in VoIP over multi-rate WLAN networks 

    Sfairopoulou, Anna (Date of defense: 2008-07-28)

    In IEEE 802.11 WLANs, Link Adaptation mechanisms, which choose the transmission rate of each node, provoke unexpected and random variations on the effective channel capacity. When these changes are towards lower bitrates, ...

    A hierarchical framework for peer-to peer systems: design and optimizations 

    Sánchez Artigas, Marc (Date of defense: 2009-01-12)

    En los últimos años, las redes peer-to-peer (P2P) ha experimentado una fuerte expansión. Estos sustratos se constituyen en forma de redes overlay o de recubrimiento que interconectan usuarios de manera lógica y desacoplada ...

    A low power listening with wake up after transmissions MAC protocol for WSNs 

    Cano Bastidas, Cristina (Date of defense: 2011-03-04)

    In the last few years Wireless Sensor Networks (WSNs) have become an interesting field of research mainly due to the challenges and constraints of their design and the broad range of potential applications they can provide. ...

    A self-organizing management platform for wireless sensor networks 

    Cao Minh, Trang (Date of defense: 2014-09-25)

    Through advances in sensor, networking, semiconductor and energy storage technologies, Wireless Sensor Networks (WSNs) are increasingly being deployed in many important applications to enable users to access information ...

    A semantic web approach to digital rights management 

    García González, Roberto (Date of defense: 2006-04-21)

    Un dels principals requeriments de la gestió de drets digitals a la Web és un llenguatge compartit per a la representació del copyright. Les aproximacions actuals es basen en solucions purament sintàctiques, simples i ...

    A statistical dynamic cardiac atlas for the virtual physiological human: construction and application 

    Hoogendoorn, Corné (Date of defense: 2014-02-26)

    This thesis is centered on the construction of a cardiac atlas to serve as a common reference frame in the Virtual Physiological Human (VPH). The construction covers the entire construction pipeline, starting from a set ...

    Affine invariant image comparison and its applications 

    Fedorov, Vadim (Date of defense: 2016-10-11)

    La comparación de imágenes es un ingrediente fundamental en muchos problemas de procesamiento de imagen y visión por computador. Esta tesis aborda el problema de la comparación de entornos locales en imágenes, o patches, ...

    Agents negotiating in a semantic web architecture (SWA) 

    Gil Iranzo, Rosa María (Date of defense: 2005-02-04)

    La arquitectura semántica diseñada ha sido probada dentro del entorno de la gestión de los derechos de la propiedad intelectual. Esta permite asimilar nuevos módulos y cambios en la estructura. Se ha diseñado específicamente ...

    Algebraic techniques for universal succinct arguments 

    Zapico Barrionuevo, Victoria Arantxa (Date of defense: 2022-10-13)

    In this thesis, we make theoretical and practical contributions to the design of succinct arguments with universal setups in the pairing-based setting. We first introduce a new primitive, Checkable Subspace Sampling (CSS) ...

    Algorithmic bias in graph-based recommender systems 

    Fabbri, Francesco (Date of defense: 2022-10-25)

    Recommender Systems represent a key instrument to convey consumption of contents available on the Web. They enhance the engagement among the users and the online platforms through algorithmic personalization. Injecting ...

    Algorithmic fairness in practice: data, models and interactions 

    Solans Noguero, David (Date of defense: 2022-09-14)

    The fast-growing adoption of technologies based on Machine Learning (ML), in addition to the large scale at which they operate, makes them a potential source of systematic discrimination against disadvantaged social ...

    Algorithms and complex phenomena in networks: Neural ensembles, statistical, interference and online communities 

    Gómez Cerdà, Vicenç (Date of defense: 2008-06-23)

    Aquesta tesi tracta d'algoritmes i fenòmens complexos en xarxes.<br/><br/>En la primera part s'estudia un model de neurones estocàstiques inter-comunicades mitjançant potencials d'acció. Proposem una tècnica de modelització ...

    Algorithms and representations for supporting online music creation with large-scale audio databases 

    Roma Trepat, Gerard (Date of defense: 2015-06-05)

    The rapid adoption of Internet and web technologies has created an opportunity for making music collaboratively by sharing information online. However, current applications for online music making do not take advantage of ...