• Prosodic phrase alignment for machine dubbing

  Öktem, Alp; Farrús, Mireia; Bonafonte, Antonio (International Speech Communication Association (ISCA), 2019)

  Dubbing is a type of audiovisual translation where dialogues are translated and enacted so that they give the impression that the media is in the target language. It requires a careful alignment of dubbed recordings ...
• Transferring knowledge from discourse to arguments: a case study with scientific abstracts

  Accuosto, Pablo; Saggion, Horacio (ACL (Association for Computational Linguistics), 2019)

  In this work we propose to leverage resources available with discourse-level annotations to facilitate the identification of argumentative components and relations in scientific texts, which has been recognized as a ...
• Concept-level design analytics for blended courses

  Albó, Laia; Barria-Pineda, Jordan; Brusilovsky, Peter; Hernández Leo, Davinia (Springer, 2019)

  Although many efforts are being made to provide educators with dashboards and tools to understand student behaviors within specific technological environments (learning analytics), there is a lack of work in supporting ...
• PyToBI: a toolkit for ToBI labeling under Python

  Domínguez Bajo, Mónica; Rohrer, Patrick Louis; Soler-Company, Juan (International Speech Communication Association (ISCA), 2019)

  PyToBI is introduced as a user-friendly toolkit for the automatic annotation of intonation contours using the Tones and Breaks Indexes convention, known as ToBI. Index Terms: speech prosody, ToBI, automatic annotation, speech ...
• A Model for evaluating popularity and semantic information variations in radio listening sessions

  Porcaro, Lorenzo; Gómez Gutiérrez, Emilia, 1975- (2019)

  Listening to music radios is an activity that since the 20th century is part of the cultural habits for people all over the world. While in the case of analog radios DJs are in charge of selecting the music to be ...
• CCA2-secure threshold broadcast encryption with shorter ciphertexts

  Daza, Vanesa; Herranz, Javier; Morillo, Paz; Ràfols, Carla (Springer, 2007)

  In a threshold broadcast encryption scheme, a sender chooses (ad-hoc) a set of n receivers and a threshold t, and then encrypts a message by using the public keys of all the receivers, in such a way that the original ...
• The Security of all bits using list decoding

  Morillo, Paz; Ràfols, Carla (Springer, 2009)

  The relation between list decoding and hard-core predicates has provided a clean and easy methodology to prove the hardness of certain predicates. So far this methodology has only been used to prove that the O(log logN) ...
• Constant size ciphertexts in threshold attribute-based encryption

  Herranz, Javier; Laguillaumie, Fabien; Ràfols, Carla (Springer, 2010)

  Attribute-based cryptography has emerged in the last years as a promising primitive for digital security. For instance, it provides good solutions to the problem of anonymous access control. In a ciphertext- policy ...
• Short attribute-based signatures for threshold predicates

  Herranz, Javier; Laguillaumie, Fabien; Libert, Benoît; Ràfols, Carla (Springer, 2012)

  Attribute-based cryptography is a natural solution for fine- grained access control with respect to security policies. In the case of attribute-based signatures (ABS), users obtain from an authority their secret keys ...
• An algebraic framework for Diffie-Hellman assumptions

  Escala, Alex; Herold, Gottfried; Kiltz, Eike; Ràfols, Carla; Villar, Jorge (Springer, 2013)

  We put forward a new algebraic framework to generalize and analyze Di_e-Hellman like Decisional Assumptions which allows us to argue about security and applications by considering only algebraic properties. Our D`;k-MDDH ...
• Identification of potential Music Information Retrieval technologies for computer-aided jingju singing training

  Gong, Rong; Serra, Xavier (2017)

  Music Information Retrieval (MIR) technologies have been proven useful in assisting western classical singing training. Jingju (also known as Beijing or Peking opera) singing is different from western singing in terms ...
• Polynomial spaces: a new framework for composite to-prime-order transformations

  Herold, Gottfried; Hesse, Julia; Hofheinz, Dennis; Ràfols, Carla; Rupp, Andy (Springer, 2014)

  At Eurocrypt 2010, Freeman presented a framework to convert cryptosystems based on composite-order groups into ones that use prime-order groups. Such a transformation is interesting not only from a conceptual point of ...
• Identity-based lossy trapdoor functions: new definitions, hierarchical extensions, and implications

  Escala, Alex; Herranz, Javier; Libert, Benoît; Ràfols, Carla (Springer, 2014)

  Lossy trapdoor functions, introduced by Peikert and Waters (STOC’08), have received a lot of attention in the last years, because of their wide range of applications. The notion has been recently extended to the ...
• Stretching Groth-Sahai: NIZK proofs of partial satisfiability

  Ràfols, Carla (Springer, 2015)

  Groth, Ostrovsky and Sahai constructed a non-interactive Zap for NP-languages by observing that the common reference string of their proof system for circuit satisfiability admits what they call correlated key generation. ...
• QA-NIZK arguments in asymmetric groups: new tools and new constructions

  González, Alonso; Hevia, Alejandro; Ràfols, Carla (Springer, 2015)

  A sequence of recent works have constructed constant-size quasi-adaptive (QA) NIZK arguments of membership in linear subspaces of ^Gm, where ^G is a group equipped with a bilinear map e : G x H --> T. Although applicable ...
• The Kernel Matrix Diffie-Hellman assumption

  Morillo, Paz; Ràfols, Carla; Villar, Jorge L. (Springer, 2016)

  We put forward a new family of computational assumptions, the Kernel Matrix Diffi-Hellman Assumption. Given some matrix A sampled from some distribution D, the kernel assumption says that it is hard to find \in the ...
• Data augmentation for instrument classification robust to audio effects

  Ramires, António; Serra, Xavier (2019)

  Reusing recorded sounds (sampling) is a key component in Electronic Music Production (EMP), which has been present since its early days and is at the core of genres like hip-hop or jungle. Commercial and non-commercial ...
• Standard quasi-conformal flattening of the right and left atria

  Nuñez-Garcia, Marta; Bernardino Perez, Gabriel; Doste, Rubén; Zhao, Jichao; Camara, Oscar; Butakoff, Constantine (Springer, 2019)

  Two-dimensional standard representations of 3D anatomical structures are a simple and intuitive way for analysing patient information across populations and image modalities. They also allow convenient visualizations that ...
• A Monte Carlo tree search approach to learning decision trees

  Nunes, Cecília; De Craene, Mathieu; Langet, Hélène; Camara, Oscar; Jonsson, Anders, 1973- (Institute of Electrical and Electronics Engineers (IEEE), 2019)

  Decision trees (DTs) are a widely used prediction tool, owing to their interpretability. Standard learning methods follow a locally-optimal approach that trades off prediction performance for computational efficiency. Such ...
• Uplink fractional power control for cell-free wireless networks

  Nikbakht, Rasoul; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2019)

  This paper proposes a power control policy for the uplink of cell-free wireless networks. Such policy, which generalizes the fractional power control used extensively in cellular networks, relies only on large-scale ...

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