Articles de revista

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  • Arcs and tensors 

    Ball, Simeon Michael; Lavrauw, Michel (2019-08-01)
    Article
    Restricted access - publisher's policy
    To an arc A of PG(k-1,q) of size q+k-1-t we associate a tensor in ¿¿k,t(A)¿¿k-1 , where ¿k,t denotes the Veronese map of degree t defined on PG(k-1,q) . As a corollary we prove that for each arc A in PG(k-1,q) of size ...

  • Matching points with disks with a common intersection 

    Huemer, Clemens; Pérez Lantero, Pablo; Seara Ojea, Carlos; Silveira, Rodrigo Ignacio (2019-07-01)
    Article
    Restricted access - publisher's policy
    We consider matchings with diametral disks between two sets of points R and B. More precisely, for each pair of matched points p ¿ R and q ¿ B, we consider the disk through p and q with the smallest diameter. We prove that ...

  • Rainbow matchings in Dirac bipartite graphs 

    Coulson, Matthew John; Perarnau Llobet, Guillem (2019-01-15)
    Article
    Restricted access - publisher's policy
    We show the existence of rainbow perfect matchings in µn-bounded edge colorings of Dirac bipartite graphs, for a sufficiently small µ¿>¿0. As an application of our results, we obtain several results on the existence of ...

  • Non-crossing paths with geographic constraints 

    Silveira, Rodrigo Ignacio; Speckmann, Bettina; Verbeek, Kevin (Chapman & Hall/CRC, 2019-01-01)
    Article
    Open Access
    A geographic network is a graph whose vertices are restricted to lie in a prescribed region in the plane. In this paper we begin to study the following fundamental problem for geographic networks: can a given geographic ...

  • Electron density retrieval from truncated Radio Occultation GNSS data 

    Lyu, Haixia; Hernández Pajares, Manuel; Monte Moreno, Enrique; Cardellach Galí, Estel (2019-06-01)
    Article
    Open Access
    This paper summarizes the definition and validation of two complementary new strategies, to invert incomplete Global Navigation Satellite System Radio-Occultation (RO) ionospheric measurements, such as the ones to be ...

  • Critical issues in ionospheric data quality and implications for scientific studies 

    Araujo-Pradere, E.; Weatherhead, E. C.; Dandenault, P. B.; Bilitza, D.; Wilkinson, P.; Hernández Pajares, Manuel (2019-05)
    Article
    Open Access
    Ionospheric data are valuable records of the behavior of the ionosphere, solar activity, and the entire Sun-Earth system. The data are critical for both societally important services and scientific investigations of upper ...

  • Stress relaxation in epithelial monolayers is controlled by the actomyosin cortex 

    Khalilgharibi, Nargess; Fouchard, Jonathan; Asadipour, Nina; Barrientos, Ricardo; Duda, Maria; Bonfanti, Alessandra; Yonis, Amina; Harris, Andrew; Mosaffa, Payman; Fujita, Yasuyuki; Kabla, Alexandre; Mao, Yanlan; Baum, Buzz; Muñoz Romero, José; Miodownik, Mark; Charras, Guillaume (2019-01-01)
    Article
    Open Access
    Epithelial monolayers are one-cell thick tissue sheets that separate internal and external environments. As part of their function, they have to withstand extrinsic mechanical stresses applied at high strain rates. However, ...

  • Planar differential growth rates initiate precise fold positions in complex epithelia 

    Muñoz Romero, José (2019-11-04)
    Article
    Restricted access - publisher's policy
    Tissue folding is a fundamental process that shapes epithelia into complex 3D organs. The initial positioning of folds is the foundation for the emergence of correct tissue morphology. Mechanisms forming individual folds ...

  • Differentiable families of traceless matrix triples 

    García Planas, María Isabel; Klymchuk, Tetiana (springer-Verlag, 2019-12-06)
    Article
    Restricted access - publisher's policy
    Analysis of spectra of families of sets of matrices verifying certain properties is not simple because phenomena as singularities and bifurcations appear. An excellent tool for the analysis can be making use of versal ...

  • Minor loops of the Dahl and LuGre models 

    Ikhouane, Fayçal; Mañosa Fernández, Víctor; Pujol Vázquez, Gisela (2020-01)
    Article
    Restricted access - publisher's policy
    Hysteresis is a special type of behavior encountered in physical systems: in a hysteretic system, when the input is periodic and varies slowly, the steady-state part of the output- versus-input graph becomes a loop called ...

  • Flaix de ciència. Massa petits per poder ser modelitzats? Models basats en l’individu per representar i investigar poblacions microbianes amb creixement no planctònic 

    Ginovart Gisbert, Marta; Font Marques, Meritxell (2019)
    Article
    Open Access
    Un model, una representació idealit­zada i aproximada, per a una població microbiana, pot ser desenvolupat a partir d’un disseny complicat i sofisti­cat, si es volen abordar qüestions en detall o tractar determinats aspectes ...

  • Modelización basada en agentes: canibalismo microbiano 

    Ginovart Gisbert, Marta; Tutusaus, Albert; Mas Serra, Maite (2019)
    Article
    Open Access
    n un sistema biologico, las interacciones entre los organismos pueden ser interespecificas, cuando se relacionan organismosde la comunidad de diferente especie, o intraespecificas. Estas interacciones, que pueden ser ...

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