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Ara es mostren els items 13643-13662 de 245593

    • Amplificador en clase D para aplicaciones de audio 

      Macario Chib, Romà (Universitat Politècnica de Catalunya, 2019-07-03)
      Treball Final de Grau
      Accés obert
      El objetivo de este Trabajo de Fin de Grado es el diseño, simulación y posterior implementación de un amplificador de potencia en clase D para aplicaciones en sistemas de audio. Para tal fin, se ha estudiado el funcionamiento ...

    • Amplificador Wi-fi 

      Fernandez Ducable, Didac (Universitat Politècnica de Catalunya, 2008-02)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Este trabajo explica detalladamente el proceso de fabricación de un circuito de Microondas, es decir; que opera a altas frecuencias. En él, se ha detallado específicamente todos los pasos que se deben dar para que dicho ...

    • Amplificadores multietapa de bajo en las bandas de 20 y 30ghz 

      Artal, E; Corbella Sanahuja, Ignasi; Busquets, C; Pradell i Cara, Lluís (1989)
      Text en actes de congrés
      Accés obert
      Microstrip coupled lines technology has been used to design and built low noise amplifiers in 20 and 30 GHz bands. Active devices are GaAs MESFET and HEMT in chip form. The amplifiers have input and output waveguide ...

    • Amplification of quadratic solitons 

      Torner Sabata, Lluís (1998-08)
      Article
      Accés restringit per política de l'editorial
      Amplification of spatial solitons in quadratic nonlinear media under conditions for second-harmonic generation is addressed. Under the action of gain at a given frequency band the energy has to be redistributed ...

    • Amplification of the Temperature Seasonality in the Mediterranean Region Under Anthropogenic Climate Change 

      Feng, Xiaofan; Qian, Cheng; Materia, Stefano (Wiley, 2022-10)
      Article
      Accés obert
      Abstract Amplified warming in the Mediterranean region in summer, corresponding to strengthening temperature seasonality (Tseasonality), increases the frequency and intensity of heatwaves and endangers both human health ...

    • Amplified catalogue of vibration reduction index formulas for junctions based on numerical simulations 

      Poblet-Puig, Jordi; Guigou-Carter, Catherine (Deutsche Gesellschaft für Akustik e.V. (DEGA), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The vibration reduction index (Kij) is a key parameter in the prediction of flanking transmissions according to the EN-12354 standard. Formulas for the evaluation of Kij in L, T and X junctions that depend on the mass ratio ...

    • Amplified warming of seasonal cold extremes relative to the mean in the Northern Hemisphere extratropics 

      Gross, Mia H.; Donat, Markus G.; Alexander, Lisa V.; Sherwood, Steven C. (Copernicus Publications, 2020)
      Article
      Accés obert
      Cold extremes are anticipated to warm at a faster rate than both hot extremes and average temperatures for much of the Northern Hemisphere. Anomalously warm cold extremes can affect numerous sectors, including human health, ...

    • Amplios terrenos urbanos de óptima ubicación: la escuela de enseñanza media en la ciudad argentina (1934-1944) 

      Fiorito, Mariana (Departament d'Urbanisme i Ordenació del Territori. Universitat Politècnica de Catalunya / Instituto del Conourbano. Universidad Nacional General Sarmiento / Instituto de Arte Americano. Universidad de Buenos Aires, 2013-06)
      Comunicació de congrés
      Accés obert
      En la Argentina de los años treinta tanto las obras de infraestructura como las de arquitectura estatal adoptaron un carácter tendiente al progreso y al desarrollo social ya que ciertos problemas sociales devinieron ...

    • Amplitude death and restoration in networks of oscillators with random-walk diffusion 

      Clusella Coberó, Pau; Pastor Satorras, Romualdo (2021-01-26)
      Article
      Accés obert
      Systems composed of reactive particles diffusing in a network display emergent dynamics. While Fick’s diffusion can lead to Turing patterns, other diffusion schemes might display more complex phenomena. Here we study the ...

    • Amplitude equation approach to spatiotemporal dynamics of cardiac alternans 

      Echebarría Domínguez, Blas; Karma, Alain (American Physical Society, 2007-11-30)
      Article
      Accés obert
      Amplitude equations are derived that describe the spatiotemporal dynamics of cardiac alternans during periodic pacing of one- B. Echebarria and A. Karma, Phys. Rev. Lett. 88, 208101 2002 and twodimensional homogeneous ...

    • Amplitude of weighted majority game strict representations 

      Freixas Bosch, Josep; Puente del Campo, María Albina (Institut d'Estadística de Catalunya, 1999)
      Article
      Accés obert
      Some real situations which may be described as weighted majority games can be modified when some players increase or decrease their weights and/or the quota is modified. Nevertheless, some of these modifications do not ...

    • Amsterdam School: materialised ideals 

      Lubbers, Laura; Mangers, Nikki (2019-04-14)
      Audiovisual
      Accés obert
      Laura Lubbers (BA History, University of Amsterdam) and Nikki Mangers (BA Art History, University of Amsterdam) are working in Museum Het Schip. This museum is located in the expressionistic "worker's palace" (1919), ...

    • Amueblado de propiedades en 3D 

      Ramos Refusta, Joan Manuel (Universitat Politècnica de Catalunya, 2021-06-30)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      Floorfy es una de las empresas que se dedica a realizar renders tridimensionales de hogares para inmobiliarias. Estos renders se les llama tours virtuales. Este servicio tiene muchas ventajas y facilidades para el usuario. ...

    • Amygdalin analogues inhibit INF-gamma signalling reducing inflammatory response in human keratinocytes (HaCat) 

      Paoletti, Iole; De Gregorio, Vicenza; Baroni, Adone; Tufano, Maria Antonieta; Donnarumma, Giovanna; Pérez González, Juan Jesús (2013-12-02)
      Article
      Accés restringit per política de l'editorial
      Peptide T (PT), an octapeptide fragment located in the V2 region of the HIV-1 gp120- coating protein, appears to be bene fi cial in the treatment of psoriasis. Our previous investigations suggest that keratinocytes ...

    • Amyloid fibrils from organic solutions of an amphiphilic dipeptide 

      Casanovas Salas, Jordi; Mayans Tayadella, Enric; Díaz Andrade, Angélica María; Martínez Gil, Ana; Jimenez Sanz, Ana Isabel; Cativiela, Carlos; Puiggalí Bellalta, Jordi; Alemán Llansó, Carlos (2019-01-01)
      Article
      Accés obert
      Non-hydrated organic solutions of a diphenylalanine amphiphile blocked at the C-terminus with a fluorenylmethyl ester and stabilized at the N-terminus with a trifluoroacetate have been used to prepare amyloid fibrils. The ...

    • Amyloid-like fibrils from a diphenylalanine capped with an aromatic fluorenyl 

      Martí Ballesté, Dídac; Mayans Tayadella, Enric; Gil, Ana M.; Díaz Andrade, Angélica María; Jimenez Sanz, Ana Isabel; Yousef, Ibraheem; Keridou, Ina; Cativiela, Carlos; Puiggalí Bellalta, Jordi; Alemán Llansó, Carlos (2018-11-19)
      Article
      Accés obert
      The self-assembly behavior of a diphenylalanine amphiphile blocked at the C-terminus with a 9-fluorenylmethyl ester and stabilized at the N-terminus with a trifluoroacetate (TFA) anion, TFA·FF-OFm, has been examined. At ...

    • An a priori error analysis of a Lord–Shulman poro-thermoelastic problem with microtemperatures 

      Baldonado, Jacobo; Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón (2020-10)
      Article
      Accés obert
      In this paper, we deal with the numerical analysis of the Lord–Shulman thermoelastic problem with porosity and microtemperatures. The thermomechanical problem leads to a coupled system composed of linear hyperbolic partial ...

    • An a priori error analysis of a porous strain gradient model 

      Baldonedo, Jacobo; Fernández, José Ramón; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (Wiley-VCH, 2022-01)
      Article
      Accés obert
      In this work, we consider, from the numerical point of view, a boundary-initial value problem for non-simple porous elastic materials. The mechanical problem is written as a coupled hyperbolic linear system in terms of ...

    • An a priori error analysis of a type III thermoelastic problem with two porosities 

      Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón; Suarez, Sofia (2023-03)
      Article
      Accés obert
      In this work, we study, from the numerical point of view, a type III thermoelastic model with double porosity. The thermomechanical problem is written as a linear system composed of hyperbolic partial differential equations ...

    • An a priori error analysis of poro-thermoviscoelastic problems 

      Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón (Elsevier, 2020-08-15)
      Article
      Accés obert
      In this paper, we study, from the numerical point of view, a dynamic one-dimensional problem arising in thermoelasticity and thermoviscoelasticity of types II and III. Porosity is also included into the models. The generic ...