Ara es mostren els items 5-24 de 24

    • Estimation of dispersion curves by combining effective elastic constants and SAFE method: a case study in a plate under stress 

      Quiroga, Jabid; Mujica Delgado, Luis Eduardo; Villamizar Mejía, Rodolfo; Ruiz Ordóñez, Magda; Camacho-Navarro, Jhonatan (Institute of Physics (IOP), 2017)
      Article
      Accés obert
      This paper presents an approach to calculate dispersion curves for homogeneous and isotropic plates subject to stress, via Semi-Analytical Finite Element and the Effective Elastic Constants, since stresses in the waveguide ...
    • Extension of maps defined on many fibres 

      Barja Yáñez, Miguel Ángel; Naranjo, J. C. (1997)
      Article
      Accés obert
      Let S be a fibred surface. We prove that the existence of morphisms from non countably many fibres to curves implies, up to base change, the existence of a rational map from S to another surface fibred over the same base ...
    • La corba de l'equilibri: anàlisi de la corba catenària en l'arquitectura del vi a través del modelatge paramètric 

      Montolio Font, Alexandre (Universitat Politècnica de Catalunya, 2023-05-17)
      Treball Final de Grau
      Accés obert
      La catenària és un exemple d’equilibri que ens regala la naturalesa, motiu d’arquitectures elegants, òptimes, però complexes d’executar. Aquesta investigació relata un període de crisi de recursos materials en el qual es ...
    • Ley del movimiento de parada de un palpador de máquina de medida por coordenadas mediante curvas de Bézier 

      Veciana Fontanet, Joaquim Maria; Cardona Foix, Salvador (2004-05)
      Article
      Accés restringit per política de l'editorial
      Se propone la definición, a través de curvas de Bezier no paramétricas, de la ley que rige el movimiento de parada de un palpador de máquina de medida por coordenadas. El objetivo principal es la reducción de las oscilaciones ...
    • Local geometry of analytic planar morphisms 

      Almirón Cuadros, Patricio (Universitat Politècnica de Catalunya, 2017-07)
      Projecte Final de Màster Oficial
      Accés obert
      This work focuses in the study of local geometry of analytic planar morphisms. First, we introduce the basic concepts that will be needed to present the main part of the work. Secondly, we study the effect of analytic ...
    • Moduli spaces and formal operads 

      Guillén Santos, Francisco; Navarro, Vicenç (Navarro Aznar); Pascual Gainza, Pere; Roig Martí, Agustín (2003)
      Article
      Accés obert
      Let Mg,l be the moduli space of stable algebraic curves of genus g with l marked points. With the operations which relate the different moduli spaces identifying marked points, the family (Mg,l)g,l is a modular operad ...
    • Multiplier ideals of plane curves 

      Dachs Cadefau, Ferran (Universitat Politècnica de Catalunya, 2012-10)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Multiplier ideals and their corresponding jumping numbers have been revealed as a fundamental tool to measure the singularity of plane curves. There are approaches to these objects from both Commutative Algebra and Algebraic ...
    • On the elliptic Stark conjecture at primes of multiplicative reduction 

      Casazza, Daniele; Rotger Cerdà, Víctor (2019-01-01)
      Article
      Accés obert
      In [DLR], Darmon, Lauder, and Rotger formulated a p-adic elliptic Stark conjecture for the twist of an elliptic curve E/Q by the self-dual tensor product ¿ ¿ of two odd and two-dimensional Artin representations. These ...
    • On the slope of bielliptic fibrations 

      Barja Yáñez, Miguel Ángel (1997)
      Article
      Accés obert
      Let $\pi :S\longrightarrow B$ be a bielliptic fibration. We prove $S$ is, up to base change, a rational double cover of an elliptic fibration and that $\pi $ is isotrivial provided it is smooth. Finally, we prove that the ...
    • On the slope of fibred surfaces 

      Barja Yáñez, Miguel Ángel; Zucconi, Franco (1998)
      Article
      Accés obert
    • On the Torelli problem and Jacobian Nullwerte in genus three 

      Guàrdia Rubies, Jordi (2008)
      Article
      Accés obert
      We give a closed formula for recovering a non-hyperelliptic genus three curve from its period matrix, and derive some identities between Jacobian Nullwerte in dimension three.
    • Optimizations in the computation of pairings and cryptographic applications 

      Sánchez Charles, David (Universitat Politècnica de Catalunya, 2013-07)
      Projecte Final de Màster Oficial
      Accés obert
      En la criptografía de clave pública actual el uso de curvas elípticas es cada vez más habitual debido a que ofrecen una seguridad similar a los ya utilizados cuerpos finitos, pero con unas claves más cortas. Por otra parte, ...
    • Proper generalized decomposition solutions within a domain decomposition strategy 

      Huerta, Antonio; Nadal Soriano, Enrique; Chinesta, Francisco (John Wiley & sons, 2018-03-30)
      Article
      Accés obert
      Domain Decomposition strategies and the Proper Generalized Decomposition are efficiently combined to obtain a fast evaluation of the solution approximation in parameterized elliptic problems with complex geometries. The ...
    • Rational parametrization of Q-curves: Sage implementatio 

      Geffner Fuenmayor, Ivan Eduardo (Universitat Politècnica de Catalunya, 2013-09)
      Treball Final de Grau
      Accés obert
      En aquest treball donarem una parametrització d'un tipus especial de corbes algebràiques anomenades "Q-corbes". Primer farem una introducció per familiartizar al lector amb conceptes bàsics i resultats previs, i després ...
    • Sato-Tate distributions and Galois endomorphism modules in genus 2 

      Fité, Francesc; Kedlaya, Kiran; Rotger Cerdà, Víctor; Sutherland, Andrew (2012)
      Article
      Accés restringit per política de l'editorial
      For an abelian surface A over a number eld k, we study the limit- ing distribution of the normalized Euler factors of the L-function of A. This distribution is expected to correspond to taking characteristic poly- nomials ...
    • Subdivided linear and curved meshes preserving features of a linear mesh model 

      Jiménez Ramos, Albert; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Sandia National Laboratories, 2019)
      Text en actes de congrés
      Accés obert
      To provide straight-edged and curved piece-wise polynomial meshes that target a unique smooth geometry while preserving the sharp features and smooth regions of the model, we propose a new fast curving method based on ...
    • Synthesis of displacement functions by Bézier curves in constant-breadth cams with parallel flat-faced translating and oscillating followers 

      Cardona Foix, Salvador; Zayas Figueras, Enrique Ernesto; Jordi Nebot, Lluïsa; Català Calderon, Pau (2013-04)
      Article
      Accés restringit per política de l'editorial
      The constant-breadth cam mechanisms, which drive a parallel flat-faced double follower, are desmodromic, and guarantee global bilaterality. In the said mechanisms, the law of displacement of the follower can only be freely ...
    • The structure and slope of bielliptic fibrations 

      Barja Yáñez, Miguel Ángel (1997)
      Article
      Accés obert
    • Tipus de reduccions de corbes 

      Guitart Morales, Xavier (Publicacions i Edicions de la Universitat de Barcelona (UB), 2008-01-31)
      Capítol de llibre
      Accés obert
    • Torcimiento de cuárticas planas lisas 

      Lorenzo García, Elisa (Universitat Politècnica de Catalunya, 2010-10)
      Projecte Final de Màster Oficial
      Accés obert
      En este trabajo se determinan los twists de las cuárticas planas lisas, es decir, de las curvas lisas no hiperelípticas de género 3. Se parte de una clasificación de Henn de las cuárticas planas y sus grupos de automorfismos ...