Now showing items 1-20 of 82

    • A generalization of the Caginalp phase-field system based on the Cattaneo law 

      Miranville, Alain; Quintanilla de Latorre, Ramón (Elsevier, 2009)
      Article
      Restricted access - publisher's policy
      We consider in this article a generalization of the Caginalp model for phase transitions based on the Maxwell Cattaneo law, instead of the classical Fourier law. In particular, we prove the existence and uniqueness of ...
    • A model in price formation 

      Anwasia, Benjamin (Universitat Politècnica de Catalunya, 2014-07)
      Master thesis
      Open Access
      In this thesis a particular example of a price formation model was studied. The model consist of a (large) group of buyers and a (large) group of vendors trading a particular good at a certain price. The model is given by ...
    • A near-optimum MAC protocol based on the distributed queueing random access protocol (DQRAP) for a CDMA mobile communication system 

      Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon; Sallent Roig, José Oriol (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-09)
      Article
      Open Access
      This paper presents and analyzes a new near-optimum medium access control (MAC) protocol. The proposed access scheme is suitable for a CDMA mobile communication environment, and keeps under control and upper bounded the ...
    • A stability theorem in nonlinear bilevel programming 

      Wang, Shouyang; Wang, Qian; Coladas Uria, Luis (Institut d'Estadística de Catalunya, 1996)
      Article
      Open Access
      In this short paper, we are concerned with the stability of nonlinear bilevel programs. A stability problem is proven and an example is given to illustrate this theorem.
    • Active damping based on Ackermann's formula for a three-phase voltage source inverter with LCL filter 

      Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Morales López, Javier; Momeneh, Arash; Miret Tomàs, Jaume; Torres Martínez, Javier (2015)
      Conference report
      Restricted access - publisher's policy
      This paper presents an active damping method in natural frame for a three-phase voltage source inverter with LCL filter. The proposed method is based on the pole placement technique via Ackermann's formula. This approach ...
    • Adapting the existing coastal patí a vela fleet for scientic purposes 

      Ortigosa Barragán, Inma; Castells Sanabra, Marcel·la; Mateu Llevadot, Jordi; Bardaji, Raul; Hoareau, Nina; Simon, Carine; Pelegrí, Josep L.; Vallès Casanova, Ignasi (Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria Nàutiques, 2020-09)
      Conference report
      Open Access
      This paper presents the first results of the Barcelona Institute of Culture’s grant for research and innovation projects under the 2019 Barcelona Science Plan entitled “Development of a citizen monitoring program for the ...
    • Amorphous carbon modified nano-sized tungsten carbide as a gas diffusion electrode catalyst for the oxygen reduction reaction 

      Liu, Zhiwei; Li, Ping; Zhai, Fuqiang; Wan, Qi; Volinsky, Alex A.; Qu, Xuanhui (2015-01-01)
      Article
      Open Access
      Nanostructured tungsten carbide with high surface area and containing amorphous carbon is prepared by a low temperature combustion synthesis method. The nanostructured tungsten carbide is used as the catalyst in a gas ...
    • An architecture providing depolarization ratio capability for a multi-wavelength Raman lidar: implementation and first measurements 

      Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Granados Muñoz, María José; Ben Chahed, Enis; Muñoz Porcar, Constantino; Barragán Cuesta, Rubén; Comerón Tejero, Adolfo; Rocadenbosch Burillo, Francisco; Vidal, Eric (MDPI AG, 2017-12-20)
      Article
      Open Access
      A new architecture for the measurement of depolarization produced by atmospheric aerosols with a Raman lidar is presented. The system uses two different telescopes: one for depolarization measurements and another for ...
    • Analysis and calibration of Ground Penetrating Radar shielded antennas 

      Rasol, M.; Pérez Gracia, María de la Vega; Santos Assunçao, Sonia (2018)
      Conference report
      Open Access
      Ground-Penetrating Radar (GPR) is a non-destructive geophysical method applied in many civil engineering applications. The knowledge of the GPR antennas behavior is crucial to obtain accurate results and comprehensive data ...
    • Analysis of bias stress on thin-film transistors obtained by Hot-Wire Chemical Vapour Deposition 

      Dosev, D K; Puigdollers i González, Joaquim; Orpella García, Alberto; Voz Sánchez, Cristóbal; Fonrodona, Marta; Soler Vilamitjana, David; Marsal, L F; Pallarès Marzal, Josep; Bertomeu Balaguero, Joan; Andreu Batallé, Jordi; Alcubilla González, Ramón (2001-02)
      Article
      Open Access
      The stability under gate bias stress of unpassivated thin film transistors was studied by measuring the transfer and output characteristics at different temperatures. The active layer of these devices consisted of in ...
    • Analysis of international one meter class hull shapes 

      Pons Forn, Ariadna (Universitat Politècnica de Catalunya, 2015-06)
      Bachelor thesis
      Restricted access - author's decision
    • Analysis on dynamic interaction of renewable SSG SPC with external power grid 

      Abdollahi, Mostafa; Candela García, José Ignacio; Rocabert Delgado, Joan; Muñoz Aguilar, Raúl Santiago; Rodríguez Cortés, Pedro (2017)
      Conference report
      Restricted access - publisher's policy
      Control of renewables by Synchronous Power Controller (SPC) technology provides virtual damping and inertia which results to support phase stability on the grid and keep synchronism of interconnected areas tighter. Serving ...
    • Analytical method for the assessment of unreinforced brick masonry walls subjected to eccentric compressive loads 

      Bernat Masó, Ernest; Gil Espert, Lluís; Roca Fabregat, Pedro (2014-12-30)
      Article
      Open Access
      Slender unreinforced masonry walls are likely to fail due to mechanism formation when they are subjected to eccentric compression loads causing second order bending effects. A practical analytical formulation is herein ...
    • Análisis de estabilidad Arnoldi de las ondas de Tollmien-Schlichting en fluidos viscosos 

      Montañez Fabrés, Raquel (Universitat Politècnica de Catalunya, 2017-07)
      Bachelor thesis
      Open Access
      En este trabajo se estudia la estabilidad de las ondas Tollmien-Schlichting, que aparecen como una primera fase de la inestabilidad del flujo de Poiseuille plano como paso de laminar a turbulento. Se calcula la curva de ...
    • Application of hyperstability theory to interference cancelling 

      Bertran Albertí, Eduardo; Montoro López, Gabriel (O.YUKSEL IEEE, 1994)
      Conference report
      Open Access
      An alternative to the usual adaptive noise cancelling method devoted to removing interference is presented. In the conventional methodology to implement adaptive cancellers a reference signal is necessary correlated with ...
    • Bounds for the Nakamura number 

      Freixas Bosch, Josep; Kurz, Sascha (Springer, 2019-04)
      Article
      Open Access
      The Nakamura number is an appropriate invariant of a simple game to study the existence of social equilibria and the possibility of cycles. For symmetric (quota) games its number can be obtained by an easy formula. For ...
    • Caracterización y supervisión del crawler submarino OBSEA 

      Cornellà Furtià, Genís; Quispe Camargo, Ángel Camilo (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      [CASTELLÀ] Un Crawler es un vehículo submarino que se desplaza por el fondo del mar conectado por un cable a una infraestructura submarina. Los movimientos del vehículo (avance, retroceso, etc…) se ordenan remotamente. ...
    • Coalition formation and stability 

      Magaña Nieto, Antonio; Carreras Escobar, Francisco (2018-06)
      Article
      Open Access
      This paper aims to develop, for any cooperative game, a solution notion that enjoys stability and consists of a coalition structure and an associated payoff vector derived from the Shapley value. To this end, two concepts ...
    • Collective relaxation dynamics and crystallization kinetics of the amorphous Biclotymol antiseptic 

      Tripathi, Pragya; Romanini, Michela; Tamarit Mur, José Luis; Macovez, Roberto (2015-11-10)
      Article
      Open Access
      We employ dielectric spectroscopy to monitor the relaxation dynamics and crystallization kinetics of the Biclotymol antiseptic in its amorphous phase. The glass transition temperature of the material as determined by ...
    • Comparison of high-order continuous and hybridizable discontinuous {G}alerkin methods in incompressible fluid flow problems 

      Paipuri, Mahendra; Fernández Méndez, Sonia; Tiago, Carlos (2018-10-01)
      Article
      Open Access
      The computational efficiency and the stability of Continuous Galerkin (CG) methods, with Taylor–Hood approximations, and Hybridizable Discontinuous Galerkin (HDG) methods are compared for the solution of the incompressible ...