Browsing by Subject "Geometry"

Now showing items 1-20 of 107

    • A configurable geometry processing system 

      Fons Sánchez, Joan (Universitat Politècnica de Catalunya, 2019-10)
      Master thesis
      Open Access
      Design and development of Meshpipe, a simple tool designed to speed up the process of mesh processing pipeline development. It includes a Python API for rapid prototyping as well as a 3D viewer environment to easily inspect ...

    • A geometric approach to dense Cayley digraphs of finite Abelian groups 

      Aguiló Gost, Francisco de Asis L.; Fiol Mora, Miquel Àngel; Pérez Mansilla, Sonia (2016)
      Article
      Open Access
      We give a method for constructing infinite families of dense (or eventually likely dense) Cayley digraphs of finite Abelian groups. The diameter of the digraphs is obtained by means of the related minimum distance diagrams. ...

    • A geometric bridge between regularised damage and energetically equivalent cracks 

      Tamayo Mas, Elena; Rodríguez Ferran, Antonio (2012)
      Conference report
      Open Access
      In order to achieve a better characterisation of a whole failure process, models which combine damage and fracture mechanics have recently been proposed. Here, a new combined methodology is presented: in order to describe ...

    • A geometric proxy of economic uncertainty based on the disagreement in survey expectations 

      Claveria González, Oscar; Monte Moreno, Enrique; Torra Porras, Salvador (2018)
      Conference lecture
      Open Access
      In this study we present a geometric approach to proxy economic uncertainty. We design a positional indicator of disagreement among survey-based agents' expectations about the state of the economy. Previous dispersion-based ...

    • A new method for ionospheric tomography and its assessment by ionosonde electron density, GPS TEC, and single-frequency PPP 

      Prol, Fabricio dos Santos; Camargo, Paulo de Oliveira; Hernández Pajares, Manuel; Honorato Muella, Marcio Tadeu de Assis (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-05)
      Article
      Open Access
      A new tomographic method was developed with the main goal of mapping the ionosphere in the region of Brazil. The ionospheric background was estimated based on ionosonde and radio-occultation measurements to overcome the ...

    • A new multisymplectic unified formalism for second order classical field theories 

      Prieto Martínez, Pedro Daniel; Román Roy, Narciso (American Institute of Mathematical Sciences, 2015-06-01)
      Article
      Open Access
      We present a new multisymplectic framework for second-order classical field theories which is based on an extension of the unified LagrangianHamiltonian formalism to these kinds of systems. This model provides a straightforward ...

    • A sensibility analysis to geometric and cutting conditions using the particle finite element method (PFEM) 

      Rodriguez Prieto, Juan Manuel; Arrazola, Pedro; Cante Terán, Juan Carlos; Kortabarria, Arratibel; Oliver Olivella, Xavier (Red Hook, 2013)
      Conference report
      Open Access
      The (PFEM) is employed to simulate orthogonal metal cutting of 42CD4 steel. The objectives of this work are mainly three: The first one is to validate PFEM strategies as an efficient tool for numerical simulation of metal ...

    • Ampliación al espacio de una aplicación de la integración en el campo complejo para la solución de una cuestión de informática gráfica 

      Lerma Usero, Miguel Ángel (Institut d'Estadística de Catalunya, 1992)
      Article
      Open Access
      El teorema de los residuos de Cauchy sirve como base para un algoritmo que permite determinar la posición relativa de un punto respecto a una curva cerrada simple. La ampliación de este método al espacio tropieza con la ...

    • An approximation of the K-function for the study of binary images 

      Ayala Gallego, Guillermo; Simó Vidal, Amelia (Institut d'estadística de Catalunya, 1993)
      Article
      Open Access
      Jensen et al. (1990) gave an exact expression for the K-function in non-overlapping Boolean models. The present study proposes and evaluates an approximate expression for the K-function in overlapping isotropic Boolean ...

    • Arcs in finite projective spaces 

      Ball, Simeon Michael; Lavrauw, Michel (2019-11-23)
      Article
      Restricted access - publisher's policy
      This is an expository article detailing results concerning large arcs in finite projective spaces. It is not strictly a survey but attempts to cover the most relevant results on arcs, simplifying and unifying proofs of ...

    • Arcs, linear sets and hermitian curves in the finite projective plane 

      Jofre Senciales, Jordi (Universitat Politècnica de Catalunya, 2018-09)
      Bachelor thesis
      Open Access
      The main object of the study of this thesis are arcs in PG(2,q2). An arc in PG(2,q2) is set of points with the property that every line intersects with the arc in at most 2 points. One can prove that an arc in PG(2,q2) has ...

    • Arquitectura en cuatro dimensiones 

      Barceló Garcia, Miquel (2006-11)
      Article
      Open Access

    • Art and math using a equally linked tetrahedron 

      Moreno Lupiáñez, Manuel; Tarrés, Josep; Sánchez Cuenca, Luis; Vinyes, Toni (2019)
      Conference lecture
      Open Access
      The tetrahedron is a well-known polyhedron. The tetrahedron can be shown with a set of lines (bars) made of 3 points (joints) from the different elements; for instance an edge is a line of 2 vertices and the same edge. The ...

    • Art and Mathematics: a Second Series of Movies 

      Emmer, Michele (1984)
      Article
      Open Access
      Une première série de films sur le thème “L'art et les mathématiques” fut complétée en 1980. Une présentation en fut faite dans un article précédent [1]. Puisque le concept général de la nouvelle série de films est exactement ...

    • Average power prediction in microcells 

      Ruiz Boqué, Sílvia; Fernández, M (Institute of Electrical and Electronics Engineers (IEEE), 1994)
      Conference report
      Open Access
      A propagation model to estimate the average received power in an urban microcell environment has been developed. This model can be used both in line of sight (LOS) and non line of sight (NLOS) conditions in any regular or ...

    • Álgebra lineal y geometría para la ingeniería 

      García Planas, María Isabel (Maria Isabel Garcia Planas, 2011)
      Book
      Open Access
      Este libro recoge el material preparado para estudiantes de la asignatura de geometr´ıa de los cursos de grado de ingenier´ıa en tecnolog´ıas industriales, ingenier´ıa qu´ımica y grado de ingenier´ıa de materiales de la ...

    • Basic metric geometry 

      Fernández Sánchez, Joaquín; Ramos Cabal, Alba (Universitat Politècnica de Catalunya, 2019-10-21)
      Lecture notes
      Open Access

    • Blending isogeometric analysis and local maximum entropy meshfree approximants 

      Rosolen, Adrián; Arroyo Balaguer, Marino (2013-09)
      Article
      Open Access
      We present a method to blend local maximum entropy (LME) meshfree approximants and isogeometric analysis. The coupling strategy exploits the optimization program behind LME approximation, treats isogeometric and LME basis ...

    • Commensurations and metric properties of Houghton's groups 

      Burillo Puig, José; Cleary, Sean; Martino, Armando; Röver, Claas E. (2016-12-01)
      Article
      Open Access
      We describe the automorphism groups and the abstract commensurators of Houghton’s groups. Then we give sharp estimates for the word metric of these groups and deduce that the commensurators embed into the corresponding ...

    • Construcció de superfícies mitjançant funcions spline 

      Brunet Crosa, Pere (Universitat Politècnica de Barcelona. Centre de Càlcul, 1981-06)
      Article
      Open Access
      La contrucción de una superficie que interpole un conjunto de puntos dados con unos ciertos requisitos de suavidad y continuidad es un problema de gran importancia tanto en aplicaciones de diseño gráfico como en el ...