Now showing items 21-40 of 46

    • Fracture micromechanisms and mechanical behavior of YBCO bulk superconductors at 77 and 300 K 

      Konstantopoulou, K; Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Segarra Rubi, Merce; Pastor, J. Y. (2014-09-01)
      Article
      Restricted access - publisher's policy
      In this study two YBa2Cu3O7-delta bulk superconductors were evaluated, with the aim of analyzing the influence of the processing method (TSMG and Bridgman) and the test temperature on their mechanical behavior. The ...
    • Full wave modelling of hts dual mode patch filters and staggered coupled-line filters 

      Flores Jiménez, Alejandro; Collado Gómez, Juan Carlos; Sans, C.; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fontcuberta, Josep (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-06-30)
      Article
      Open Access
      In order to obtain high-power handling, dual-mode patch HTS filters have been analyzed through Green's function and desegmentation techniques. A precise circuit model has been obtained and applied to the filter design ...
    • Impact of flux jumps in future colliders 

      Coello de Portugal-Martinez Vazquez, Jaime Maria; Tomas García, Rogelio; Fiscarelli, Lucio; Gamba, Davide; Martino, Michele (American Physical Society (APS), 2020-01-02)
      Article
      Open Access
      Type-II superconductors, like the Nb3Sn used in the new HL–LHC quadrupole triplet and 11 T dipoles or FCC dipoles, are known to show an unstable behavior during magnetic-field ramps. This paper presents an analysis of the ...
    • Impacto de un cable superconductor sobre la eficiencia energética de la red eléctrica 

      Romedenne Lagrange, Olivier (Universitat Politècnica de Catalunya, 2008-12)
      Master thesis (pre-Bologna period)
      Open Access
      El objetivo de este proyecto es el de realizar una evaluación de la eficiencia del sistema eléctrico, centrándose en los conjuntos de cables, y estudiar el impacto que el uso de la emergente tecnología superconductora ...
    • Improving the fabrication of all-polythiophene supercapacitors 

      Sánchez Jiménez, Margarita; Estrany Coda, Francesc; Alemán Llansó, Carlos (2017-03-01)
      Article
      Open Access
      The influence of the preparation method in the properties of poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes used to manufacture organic energy storage devices, as for example supercapacitors, have been examined by ...
    • Interface porosity in multilayered all-conducting polymer electrodes 

      Borràs Cristòfol, Núria; Estrany Coda, Francesc; Alemán Llansó, Carlos (2019-06-13)
      Article
      Open Access
      Multilayered films made with at least two different electroactive polymers, in which the least conducting one acts as a dielectric and separates the layers made with the other, behave as efficient electrodes for electrochemical ...
    • Ionic liquid gating in encapsulated hBN/MoS2/hBN devices 

      Rodan Legrain, Daniel (Universitat Politècnica de Catalunya, 2016-05-25)
      Bachelor thesis
      Open Access
      Covenantee:   Massachusetts Institute of Technology
      The ability to produce few-atoms-thick two-dimensional materials of high quality such as graphene, transition-metal dichalcogenides and hexagonal boron nitride is a major improvement in condensed-matter physics and in ...
    • La superconductividad: un potencial muy atractivo 

      Lloret Gallego, Pau; Molas Balada, Lluís; Villafafila Robles, Roberto; Sudrià Andreu, Antoni; Rull Duran, Joan; Sumper, Andreas (Grupo Tecnipublicaciones, 2008-02)
      Article
      Restricted access - publisher's policy
      La superconductividad es la capacidad que poseen ciertos materiales de presentar una resistencia al paso de la electricidad prácticamente nula en determinadas condiciones. Así, las pérdidas de energía son cercanas a cero, ...
    • Linealización de resonadores superconductores 

      Padilla Díaz, Alberto (Universitat Politècnica de Catalunya, 2008-07-24)
      Master thesis (pre-Bologna period)
      Open Access
      Los materiales superconductores de alta temperatura (HTS) permiten realizar dispositivos de muy altas prestaciones y dimensiones muy reducidas. Sin embargo, estos materiales presentan un comportamiento no-lineal ...
    • Magnetical response and mechanical properties of second generation of HTSC, YBCO materials 

      Roa Rovira, Joan Josep; Dias, F.T.; Segarra, M. (InTech — Open Access Company, 2012-05-15)
      Part of book or chapter of book
      Open Access
    • Mechanical characterization at nanometric scale of ceramic superconductor composites 

      Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M. (NovasScience Publishers, 2009)
      Part of book or chapter of book
      Restricted access - publisher's policy
    • Mechanical characterization at nanometric scale of ceramic superconductor composites I 

      Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M. (NovasScience Publishers, 2009)
      Part of book or chapter of book
      Restricted access - publisher's policy
    • Modeling superconducting transmission line bends and their impact on nonlinear effects. 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-05-31)
      Article
      Open Access
      This paper reports on a numerical technique to obtain the current distribution in the annular bent sections of planar layouts. This is used to obtain the linear and nonlinear circuit distributed parameters modeling a ...
    • Modelització dinàmica d'un cable superconductor 

      Gelabert Serra, Miquel Jeroni (Universitat Politècnica de Catalunya, 2010-03)
      Master thesis (pre-Bologna period)
      Open Access
      En aquest Projecte Fi de Carrera es desenvolupa el model din amic d'un cable superconductor per el transport i distribució d'energia el ectrica. De la necessitat de realitzar estudis dinàmics del comportament de la xarxa ...
    • Modelo híbrido para la simulación de un Superconductor de Tipo-I 

      Villuendas Pellicero, Diego (Universitat Politècnica de Catalunya, 2008-09-15)
      Master thesis
      Open Access
      En este trabajo se presenta un modelo para estudiar los superconductores de tipo-I. El objetivo principal es reproducir el estado intermedio, en el que regiones del material han transitado al estado normal mientras el resto ...
    • Nano-mechanical properties of silver-welded YBCO bulks 

      Roa Rovira, Joan Josep; Bartolomé, E.; Bozzo, Bernat; Capdevila, X.G.; Granados García, Javier A.J.; Segarra, M. (2010-02-09)
      Article
      Open Access
      The mechanical properties of melt-textured YBCO bulk boundaries are a topic of special interest especially in the manufacturing of superconductor devices for engineering applications. Instrumented indentation technique ...
    • Nanoindentation with spherical tips of single crystals of YBCO textured by the Bridgman technique: Determination of indentation stress-strain curves 

      Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Capdevila, X.G.; Segarra, M. (2010-04)
      Article
      Restricted access - publisher's policy
      The mechanical properties of superconductor ceramics are of interest in the manufacture of superconducting devices. The current trend is to produce smaller devices (using, e.g., thin films), and the correct characterization ...
    • Performance Projection of Electro-Optical Modulators for Radio-Over-Fiber in 2 GHz Cryogenic Front-End Receivers 

      Menéndez Nadal, Óscar; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Santos Blanco, M. Concepción; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-06-30)
      Article
      Open Access
      We present the design of a Y-Ba-Cu-O on LiNbO/sub 3/ cryogenic electro-optical modulator for analog 2 GHz applications. A resonant configuration of coplanar electrodes is considered, showing improvements with respect to ...
    • Pilas de combustible de una sola cámara, basadas en electrolitos de ceria dopada con gadolinia y operadas con metano y propano 

      Morales, Miguel; Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M.; Piñol, S. (2010-04-20)
      Article
      Open Access
      La principal ventaja de las pilas de combustible de óxido sólido (SOFCs) de una sola cámara, frente a las bicamerales convencionales, es que permiten simplificar el diseño del dispositivo y operar con mezclas de hidrocarburos ...
    • Planelike minimizers of nonlocal Ginzburg-Landau energies and fractional perimeters in periodic media 

      Cozzi, Matteo; Valdinoci, Enrico (2018-07-01)
      Article
      Open Access
      We consider here a nonlocal phase transition energy in a periodic medium and we construct solutions whose interfaces lie at a bounded distance from any given hyperplane. These solutions are either periodic or quasiperiodic, ...