Exploració per tema "Dynamics"

Ara es mostren els items 123-142 de 154

    • Saturn atmospheric dynamics one year after Cassini: Long-lived features and time variations in the drift of the Hexagon 

      Hueso, Ricardo; Sánchez Lavega, Agustín; Rojas, Jose Félix; Simon, Amy A.; Barry, Trevor; del Rio Gaztelurrutia, Teresa; Antuñano, Arrate; Sayanagi, Kunio; Delcroix, M.; Fletcher, Leigh N.; García Melendo, Enrique José; Pérez Hoyos, Santiago; Blalock, J; Colas, Françoise; Gómez Forrellad, Josep Maria; Gunnarson, J. L.; Peach, D.; Wong, Michael (2020-01-15)
      Article
      Accés obert
      We examine Saturn's atmospheric dynamics with observations in the visible range from ground-based telescopes and Hubble Space Telescope (HST). We present a detailed analysis of observations acquired during 2018 obtaining ...

    • Second species periodic solutions for the three body problem 

      Lamas Rodríguez, José (Universitat Politècnica de Catalunya, 2020-07)
      Projecte Final de Màster Oficial
      Accés obert
      We are going to explain the construction of second-species periodic solutions for the Restricted Planar Circular 3-Body Problem. These solutions, whose existence had been conjectured by Poincaré, are referred to periodic ...

    • Solitary-wave conduction in p-type Ge under time dependent voltage bias 

      Bergmann, Michael J.; Teistworth, Stephen W.; Bonilla, Luis L.; Rodríguez Cantalapiedra, Inma (American Physical Society, 1996-01-01)
      Article
      Accés restringit per política de l'editorial
      We present the results of numerical simulations of a drift-diffusion model—including electric-field-dependent generation-recombination processes—for closely compensated p-type Ge at low temperature and under dc+ac and ...

    • Solitary-wave dynamics in extrinsic semiconductors under dc voltage bias 

      Rodríguez Cantalapiedra, Inma; Bonilla, Luis L.; Bergmann, Michael J.; Teitsworth, Stephen W. (American Physical Society, 1993-10-01)
      Article
      Accés restringit per política de l'editorial
      Numerical-simulation results are presented for a simple drift-diffusion model which describes timedependent and nonlinear electrical transport properties of extrinsic semiconductors under timeindependent (dc) voltage ...

    • Soliton gyroscopes in media with spatially growing repulsive nonlinearity 

      Driben, Rodislav; Kartashov, Yaroslav; Malomed, Boris A.; Meier, Torsten; Torner Sabata, Lluís (2014-01-15)
      Article
      Accés obert
      We find that the recently introduced model of self-trapping supported by a spatially growing strength of a repulsive nonlinearity gives rise to robust vortex-soliton tori, i.e., three-dimensional vortex solitons, with ...

    • Stability and asymptotic behaviour of the vertical family of periodic orbits around L_5 of the restricted three-body problem 

      Jorba, Angel; Villanueva Castelltort, Jordi (1997)
      Article
      Accés obert
      In this work we study some numerical results about a family of periodic orbits of the Restricted Three Body Problem (RTBP). The family considered is one of the Lyapunov families related to the equlibrium point $L_5$. More ...

    • Stabilization of flat-mirror vertical-external-cavity surface-emitting lasers by spatiotemporal modulation of the pump profile 

      Ahmed Waseem, Waqas Waseem; Kumar, Shubham; Herrero Simon, Ramon; Botey Cumella, Muriel; Radziunas, Mindaugas; Staliunas, Kestutis (2015-10-20)
      Article
      Accés obert
      We propose and demonstrate theoretically that vertical-external-cavity surface-emitting lasers (VECSELs) with external flat mirrors can be stabilized by applying a periodic spatiotemporal modulation of the pump current. ...

    • Stabilized narrow-beam emission from broad-area semiconductor lasers 

      Medina Pardell, Judith; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (2020-03-20)
      Article
      Accés obert
      We provide a feasible and compact scheme to control and stabilize the spatiotemporal dynamics of broad-area semiconductor (BAS) lasers. The proposal is based on the ability of non-Hermitian potentials with given local ...

    • Static simulation of continuous distillation 

      Orive Arroyo, Maialen (Universitat Politècnica de Catalunya, 2012)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      The present paper is part of the ‘Dynamic Simulation of Distillation Columns’ Final Years’ Project. This report summarizes the procedure to extrapolate a binary model into a multicompound model in terms of static simulation. ...

    • Statistics in Health Sciencies at the Schools of Medicine of Barcelona 

      Moreno Fernández, Mario Victor (Institut d'estadística de Catalunya, 2002)
      Article
      Accés obert
      Ressenya sobre la recerca actual en estadística a Catalunya: resultats del grup d'investigació català "Statistics in Health Sciencies at the Schools of Medicine of Barcelona"

    • Steklov-Lyapunov type systems 

      Bolsinov, A. V.; Fedorov, Yuri (2003)
      Article
      Accés obert
      In this paper we describe integrable generalizations of the classical Steklov– Lyapunov systems, which are defined on a certain product so(m) × so(m), as well as the structure of rank r coadjoint orbits in so(m)×so(m). ...

    • Strategic network formation with attacks and immunization: dynamics 

      Claverol i González, Carla (Universitat Politècnica de Catalunya, 2021-06-29)
      Treball Final de Grau
      Accés obert
      In this project we study the dynamic behaviour of Strategic Network Formation Games with attacks and immunization introduced by Goyal et al., 2016. This model takes Reachability Network Formation Games introduced by Bala ...

    • Structural design of CANs with fine-tunable relaxation properties: a theoretical framework based on network structure and kinetics modeling 

      Konuray, Ali Osman; Fernández Francos, Xavier; Ramis Juan, Xavier (American Chemical Society, 2023-06-23)
      Article
      Accés obert
      In this work, we present a model capable of reproducing the stress relaxation dynamics of a wide range of relaxation processes in covalent adaptable networks (CANs) produced by stepwise polymerization. The proposed model ...

    • A study of cortical network models with realistic connectivity 

      Vegué Llorente, Marina (Universitat Politècnica de Catalunya, 2018-03-23)
      Tesi
      Accés obert
      Structure is fundamental in shaping the types of computations that neuronal circuits can perform. Explaining the laws that determine the connectivity properties of brain networks and their implications in neuronal dynamics ...

    • Study of the ejection/collision orbits in the spatial RTBP using the McGehee regularization 

      Ollé Torner, Mercè; Rodríguez del Río, Óscar; Soler Villanueva, Jaume (2022-08)
      Article
      Accés obert
      In this paper we analyse the McGehee regularization of the collision in the spatial Restricted three-body problem (3D RTBP). As a particular application, we study the ejection (collision) orbits. The parameterization method ...

    • Suspended sediment load at the lowermost Ebro River (Catalonia, Spain) 

      Rovira Garcia, Albert; Ibáñez, Carles; Martín Vide, Juan Pedro (2015-11)
      Article
      Accés obert
      Several attempts to estimate the suspended load and the sediment deficit caused by the reservoirs have been carried out in the lower Ebro River. However, existing data are scarce, scattered along time and space, and obtained ...

    • Synchronization-based computation through networks of coupled oscillators 

      Malagarriga Guasch, Daniel; Garcia Vellisca, Mariano A.; Villa, Alessandro; Martín Buldú, Javier; García Ojalvo, Jordi; Pons Rivero, Antonio Javier (2015-08-04)
      Article
      Accés obert
      The mesoscopic activity of the brain is strongly dynamical, while at the same time exhibits remarkable computational capabilities. In order to examine how these two features coexist, here we show that the patterns of ...

    • Testing Critical Slowing Down as a Bifurcation Indicator in a Low-Dissipation Dynamical System 

      Marconi, Mathias; Métayer, Cyrille; Acquaviva, A; Boyer, Jean Marc; Gomel, A; Quiniou, Thomas; Masoller Alonso, Cristina; Giudici, Massimo; Tredicce, Jorge R. (American Institute of Physics (AIP), 2020-09-25)
      Article
      Accés obert
      We study a two-dimensional low-dissipation nonautonomous dynamical system, with a control parameter that is swept linearly in time across a transcritical bifurcation. We investigate the relaxation time of a perturbation ...

    • The dynamics around the collinear equilibrium points of the RTBP 

      Gómez, Gerard; Mondelo González, José María (2001)
      Article
      Accés obert
      This paper is devoted to the analysis of an extended neighborhood of the collinear equilibrium points of the Restricted Three Body Problem. The analysis is done using numerical tools for the determination of periodic ...

    • The Ecogen language for genetic simulation 

      Ocaña Rebull, Jordi (Universitat Politècnica de Barcelona. Centre de Càlcul, 1985-03)
      Article
      Accés obert
      This paper tries to show, in a condensed form, the main features of ECOGEN, an event-scheduling simulation language oriented to the Population Genetics. It is based on the Pascal Language.