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Recent Submissions

  • Analysis and prediction of COVID-19 for EU-EFTA-UK and other countries 

    Català Sabaté, Martí; Cardona Iglesias, Pere Joan; Prats Soler, Clara; Alonso Muñoz, Sergio; Álvarez Lacalle, Enrique; Marchena Angos, Miquel; Conesa, David; López Codina, Daniel (2020-07-03)
    External research report
    Open Access
    The present report aims to provide a comprehensive picture of the pandemic situation of COVID-19 in the EU countries, and to be able to foresee the situation in the next coming days. We employ an empirical model, verified ...

  • Validation of a fluorometer sensor for characterization of olive varieties and evaluation of fruit ripeness index with non-destructive measurement: preliminary results 

    Arias Calderón, Rocío; Arias Calderón, Santiago; Martins, Patrícia; Cordeiro, António; Silvestre, Jose Manuel (2020)
    Conference lecture
    Open Access
    Traditionally, the criteria for deciding the optimum time to harvest olives are related to the change in color of the fruit. Olive ripeness is caused by the degradation of chlorophyll together with the synthesis of other ...

  • Comparison of Two Gas Injection Methods for Generating Bubbles in a T-Junction 

    Arias Calderón, Santiago (2020-05-28)
    Article
    Restricted access - publisher's policy
    In this work, we compare the performance of two different methods for generating bubbles in conditions relevant to microgravity. A T-junction formed by two cylindrical (1 mm of internal diameter) and perpendicular channels ...

  • Numerical and Experimental Study of the Squeezing-to-Dripping Transition in a T-Junction 

    Arias Calderón, Santiago; Villardi de Montlaur, Adeline de (2020-05-26)
    Article
    Restricted access - publisher's policy
    In this work, we study the transition from squeezing to dripping during the formation of bubbles in a capillary T-junction in conditions relevant to microgravity. The junction is formed by two perpendicular cylinders of ...

  • On the proper characterization of tooling motions and initial conditions in powder die compaction modeling 

    Hernández Ortega, Joaquín Alberto; Cante Terán, Juan Carlos; Oliver Olivella, Xavier; Weyler Pérez, Rafael (2011-08)
    Article
    Open Access
    The present paper is concerned with the finite element modeling of Powder Metallurgy (P/M) cold die compaction process. Rather than on material constitutive theories or on numerical algorithmic issues, attention is confined ...

  • Numerical modeling of crack formation in powder forming processes 

    Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier; Cante Terán, Juan Carlos; Weyler Pérez, Rafael (2011-01)
    Article
    Open Access
    This paper presents a constitutive model describing the mechanical behavior of metal powders during (uniaxial) cold die compaction processes, placing special emphasis on the modeling of cracks formed during the ejection ...

  • Strain localization, strong discontinuities and material fracture: matches and mismatches 

    Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Dias, I. F. (2012-10)
    Article
    Open Access
    The work focuses on the connections of strain localization modeling of material failure and discrete fracture mechanics. It is an attempt to give an answer to the old question of whether the finite element solutions of ...

  • On the contact domain method: a comparison of penalty and Lagrange multiplier implementations 

    Weyler Pérez, Rafael; Oliver Olivella, Xavier; Sain, Trisha; Cante Terán, Juan Carlos (2012-01)
    Article
    Open Access
    This work focuses on the assessment of the relative performance of the so-called contact domain method, using either the Lagrange multiplier or the penalty strategies. The mathematical formulation of the contact domain ...

  • A macroscopic damage-plastic constitutive law for modeling quasi-brittle fracture and ductile behavior of concrete 

    Sánchez, P.J.; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier; Díaz, G.; Sonzogni, Victorio Enrique (2012-04)
    Article
    Open Access
    A new phenomenological macroscopic constitutive model for the numerical simulation of quasi-brittle fracture and ductile concrete behavior, under general triaxial stress conditions, is presented. The model is particularly ...

  • Time to kick-start text mining for biomaterials 

    Hakimi, Osnat; Krallinger, Martin; Ginebra Molins, Maria Pau (Springer Nature, 2020)
    Article
    Restricted access - publisher's policy
    The rapidly expanding biomaterials data are challenging to organize. Text mining systems are powerful tools that automatically extract and integrate information in large textual collections. As text mining leaps forward ...

  • Embeddability of Kimura 3ST Markov matrices 

    Roca Lacostena, Jordi; Fernández Sánchez, Jesús (2018-05-14)
    Article
    Open Access
    In this note, we characterize the embeddability of generic Kimura 3ST Markov matrices in terms of their eigenvalues. As a consequence, we are able to compute the volume of such matrices relative to the volume of all Markov ...

  • La eclosión de los campings en la España franquista: el caso de la "Playa de Barcelona" 

    Rosselló i Nicolau, Maribel; Guàrdia Bassols, Manuel (2020)
    Article
    Open Access
    [CASTELLÀ] Aunque tanto el turismo como la práctica del camping tienen sus propios antecedentes, la irrupción del turismo de masas en España, y en concreto la práctica del camping, condujo durante los años cincuenta a ...

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