Ara es mostren els items 1-20 de 33

    • A data science approach for spatiotemporal modelling of low and resident air pollution in Madrid (Spain): implications for epidemiological studies 

      Gómez Losada, Álvaro; Santos, Francisca M.; Gibert, Karina; Magalhães Pires, José Carlos (2019-05-01)
      Article
      Accés obert
      Model developments to assess different air pollution exposures within cities are still a key challenge in environmental epidemiology. Background air pollution is a long-term resident and low-level concentration pollution ...
    • A multi-attribute group decision model based on unbalanced and multi-granular linguistic information: an application to assess entrepreneurial competencies in secondary schools 

      Porro Martorell, Olga; Agell Jané, Núria; Sánchez Soler, Monica; Ruiz Vegas, Francisco Javier (2021-11-01)
      Article
      Accés restringit per acord de confidencialitat
      Advances in multi-attribute group decision making require the development of structures flexible enough to deal with unbalanced and multi-granular linguistic information. New distances between linguistic terms are needed ...
    • A new meta-module design for efficient reconfiguration of modular robots 

      Parada, Irene; Sacristán Adinolfi, Vera; Silveira, Rodrigo Ignacio (Springer Nature, 2021-05-01)
      Article
      Accés obert
      We propose a new meta-module design for two important classes of modular robots. The new metamodule is three-dimensional, robust and compact, improving on the previously proposed one. It applies to socalled “edge-hinged” ...
    • A non-oscillatory face-centred finite volume method for compressible flows 

      Vila Pérez, Jordi; Giacomini, Matteo; Sevilla, Rubén; Antonio, Huerta (Elsevier, 2022-03-15)
      Article
      Accés obert
      This work presents the face-centred finite volume (FCFV) paradigm for the simulation of compressible flows. The FCFV method defines the unknowns at the face barycentre and uses a hybridisation procedure to eliminate all ...
    • A note on flips in diagonal rectangulations 

      Cardinal, Jean; Sacristán Adinolfi, Vera; Silveira, Rodrigo Ignacio (Chapman & Hall/CRC, 2018-11-09)
      Article
      Accés obert
      Rectangulations are partitions of a square into axis-aligned rectangles. A number of results provide bijections between combinatorial equivalence classes of rectangulations and families of pattern-avoiding permutations. ...
    • A study of the threshold selection in the Linear Threshold Rank for random social networks 

      Iacovissi, Laura (Universitat Politècnica de Catalunya, 2020-07)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      An influence network is a directed graph with edge weights and node thresholds. Influence spreads starting from X=S. When the sum of the weights of the incoming arcs from X overpasses a node threshold it is added to X. The ...
    • A traffic simulation tool for assessing smart city policies (CitScale) 

      Linares Herreros, María Paz; Montero Mercadé, Lídia; Casanovas Garcia, Josep (2019-09-28)
      Article
      Accés obert
      Over the last century, cities have developed as a function of increased usage of automobiles as the standard transport mode. The number of cars increased along with the population as highways and parking spots became ...
    • Bounded expansion in models of webgraphs 

      Gago Álvarez, Silvia; Schlatter, Dirk (2007-10-02)
      Article
      Accés obert
      We study the bounded expansion of several models of web graphs. We show that various deterministic graph models for large complex networks have constant bounded expansion.We study two random models of webgraphs, showing ...
    • Comunitats en xarxes complexes: detecció i centralitat 

      Quintana Mathé, Alexi (Universitat Politècnica de Catalunya, 2017-07)
      Treball Final de Grau
      Accés obert
      En aquest treball estudiem l'estructura de comunitats en xarxes complexes. S'anomenen xarxes complexes als grafs construïts a partir de dades empíriques complint una sèrie de propietats, i s'entén per comunitat en un xarxa ...
    • Empowering teachers' self assessment of their own practice on student's oral skills: EVALOE decision support system 

      Grácia, M.; Casanovas Garcia, Josep; Sancho Samsó, María Ribera; Casanovas Muñoz, Jordi; Cuatrecasas Capdevila, Marta (Scitepress, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      School is an essential context that contributes to children's communicative competence. Decision Support Systems (DSS) are tools that can help teachers to assess their own practice and to make decisions to improve it (Gregg, ...
    • Encapsulated PGD algebraic toolbox operating with high-dimensional data 

      Díez, Pedro; Zlotnik, Sergio; García González, Alberto; Huerta, Antonio (2019-11-28)
      Article
      Accés obert
      In its original conception, proper generalized decomposition (PGD) provides explicit parametric solutions, denoted as computational vademecums or digital abacuses, to parametric boundary value problems. The PGD approach ...
    • Extraction of threshold functions from formulas in propositional logic 

      Milesi Vidal, Eric (Universitat Politècnica de Catalunya, 2017-01)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Given a formula in propositional logic F in some presentation (BDD, ROBDD, truth table), our aim is to find a threshold function T that is a logical consequence of F and that is as strong as possible according to certain ...
    • Front form and point form formulation of predictive relativistic mechanics. Noninteraction theorems 

      Jaen Herbera, Javier; Molina, A; Iranzo Fernández, Vicente (1986-02)
      Article
      Accés obert
      The front form and the point form of dynamics are studied in the framework of predictive relativistic mechanics. The noninteraction theorem is proved when a Poincare-invariant Hamiltonian formulation with canonical position ...
    • Graphs with large total angular resolution 

      Aichholzer, Oswin; Korman Cozzetti, Matías; Okamoto, Yoshio; Parada Muñoz, Irene María de; Perz, Daniel; van Renssen, Andre; Vogtenhuber, Birgit (2023-01-17)
      Article
      Accés obert
      The total angular resolution of a straight-line drawing is the minimum angle between two edges of the drawing. It combines two properties contributing to the readability of a drawing: the angular resolution, which is the ...
    • Immune sets in monotone infection rules: characterization and complexity 

      Fàbrega Canudas, José; Martí Farré, Jaume; Muñoz López, Francisco Javier (Elsevier, 2023-11-15)
      Article
      Accés obert
      Many dissemination processes in graphs can be described as follows at a basic level. At each step of the process, some vertices of the graph are coloured blue, and the remaining are coloured white, and a well-defined ...
    • Isogeny-based post-quantum key exchange protocols 

      Sorinas Capdevila, Ernest (Universitat Politècnica de Catalunya, 2020-01)
      Treball Final de Grau
      Accés obert
      The goal of this project is to understand and analyze the supersingular isogeny Diffie Hellman (SIDH), a post-quantum key exchange protocol which security lies on the isogeny-finding problem between supersingular elliptic ...
    • K-1,K-3-covering red and blue points in the plane 

      Ábrego, Bernardo M.; Fernández Merchant, Silvia; Kano, Mikio; Orden, David; Pérez Lantero, Pablo; Seara Ojea, Carlos; Tejel Altarriba, Francisco Javier (Chapman & Hall/CRC, 2019-01-31)
      Article
      Accés obert
      We say that a finite set of red and blue points in the plane in general position can be K1,3-covered if the set can be partitioned into subsets of size 4, with 3 points of one color and 1 point of the other color, in such ...
    • Linkable Attribute-based Signature 

      Masip Ardévol, Héctor (Universitat Politècnica de Catalunya, 2020-10)
      Projecte Final de Màster Oficial
      Accés obert
      Attribute-based signatures, as introduced by Maji et al. [MPR11] allow to generate anonymously a signature for a message on behalf of a signing policy. To sign a message, a private attribute that satises the signing policy ...
    • Logaritme discret i aplicacions a la criptografia 

      Ferrer Fernàndez, Sergi (Universitat Politècnica de Catalunya, 2015-07)
      Treball Final de Grau
      Accés obert
      El logaritme discret és un isomorfisme entre el grup de les classes de congruència mòdul n i el grup G. Aquesta aplicació és molt útil per a crear protocols criptogràfics de clau pública. La seguretat d'aquests sistemes ...
    • Maximum box problem on stochastic points 

      Caraballo, Luis E.; Pérez Lantero, Pablo; Seara Ojea, Carlos; Ventura, Inmaculada (Springer Nature, 2021-10-28)
      Article
      Accés obert
      Given a finite set of weighted points in Rd (where there can be negative weights), the maximum box problem asks for an axis-aligned rectangle (i.e., box) such that the sum of the weights of the points that it contains is ...