Ara es mostren els items 1-20 de 45

    • 4-Holes in point sets 

      Aichholzer, Oswin; Fabila Monroy, Ruy; Gonzalez Aguilar, Hernan; Hackl, Thomas; Heredia, Marco A.; Huemer, Clemens; Urrutia Galicia, Jorge; Vogtenhuber, Birgit (2014-08-01)
      Article
      Accés obert
      We consider a variant of a question of Erdos on the number of empty k-gons (k-holes) in a set of n points in the plane, where we allow the k-gons to be non-convex. We show bounds and structural results on maximizing and ...
    • 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 ...
    • Asymptotics of sequences 

      Bender, Edward; Rué Perna, Juan José (2017-12-01)
      Capítol de llibre
      Accés restringit per política de l'editorial
    • Bounds on the size of super edge-magic graphs depending on the girth 

      Ichishima, Rikio; Muntaner Batle, Francesc Antoni; Rius Font, Miquel (2009-12-13)
      Report de recerca
      Accés obert
      Let G = (V,E) be a graph of order p and size q. It is known that if G is super edge-magic graph then q 2p−3. Furthermore, if G is super edge-magic and q = 2p−3, then the girth of G is 3. It is also known that if the ...
    • 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 ...
    • Continuous mean distance of a weighted graph 

      Garijo Royo, Delia; Marquez Pérez, Alberto; Silveira, Rodrigo Ignacio (2023-08-01)
      Article
      Accés obert
      We study the concept of the continuous mean distance of a weighted graph. For connected unweighted graphs, the mean distance can be defined as the arithmetic mean of the distances between all pairs of vertices. This parameter ...
    • (Di)graph products, labelings and related results 

      López Masip, Susana Clara (2017-07)
      Article
      Accés obert
      Gallian's survey shows that there is a big variety of labelings of graphs. By means of (di)graphs products we can establish strong relations among some of them. Moreover, due to the freedom of one of the factors, we can ...
    • Dirichlet-to-Robin maps on finite networks 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2015-04-01)
      Article
      Accés obert
      Our aim is to characterize those matrices that are the response matrix of a semi positive definite Schrodinger operator on a circular planar network. Our findings generalize the known results and allow us to consider both ...
    • El arte de contar: combinatoria y enumeración 

      Rué Perna, Juan José (RBA Libros, 2011-06-01)
      Llibre
      Accés restringit per política de l'editorial
      Muchas de las preguntas más importantes de las matemáticas modernas requieren dominar un arte muy especial: el de contar. La rama de las matemáticas que ha hecho del enumerar un arte se llama combinatoria, y de la mano de ...
    • 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, ...
    • Empty monochromatic simplices 

      Aichholzer, Oswin; Fabila Monroy, Ruy; Hackl, Thomas; Huemer, Clemens; Urrutia Galicia, Jorge (2014-03-01)
      Article
      Accés obert
      Let S be a k-colored (finite) set of n points in , da parts per thousand yen3, in general position, that is, no (d+1) points of S lie in a common (d-1)-dimensional hyperplane. We count the number of empty monochromatic ...
    • 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 ...
    • Enumerating super edge-magic labelings for some types of path-like trees 

      López Masip, Susana Clara; Muntaner Batle, Francesc Antoni; Rius Font, Miquel (2010-06-02)
      Article
      Accés obert
      The main goal of this paper is to use a variation of the Kronecker product of matrices in order to obtain lower bounds for the number of non isomorphic super edge-magic labelings of some types of path-like trees. As a ...
    • 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 ...