Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 11876-11895 of 20579

    • Localized states and non-variational Ising Bloch transition of a parametrically driven easy-plane ferromagnetic ... 
      Clerc Gavilán, Marcel; Coulibaly, Saliya; Laroze, David (ELSEVIER, 2010)
      A time-periodic magnetic field applied transversally to the hard axis of an extended easy-plane ferromagnetic sample can produce parametric resonance. For the 2:1 resonance, the prototype orderparameter- equation derived ...
    • Localized states beyond the asymptotic parametrically driven amplitude equation 
      Clerc Gavilán, Marcel; Coulibaly, S.; Laroze, David (AMER PHYSICAL SOC, 2008-05)
      We study theoretically a family of localized states which asymptotically connect a uniform oscillatory state in the magnetization of an easy-plane ferromagnetic spin chain when an oscillator magnetic field is applied ...
    • Localized states in bistable pattern-forming systems 
      Bortolozzo, U.; Clerc Gavilán, Marcel; Falcón Beas, Claudio; Residori, S.; Rojas, R. (AMERICAN PHYSICAL SOC, 2006-06)
      We present a unifying description close to a spatial bifurcation of localized states, appearing as large amplitude peaks nucleating over a pattern of lower amplitude. Localized states are pinned over a lattice spontaneously ...
    • Localized structures and spatiotemporal chaos: comparison between the driven damped sine-gordon and the ... 
      Ferré, Michel A.; Clerc Gavilán, Marcel; Coulibally, Saliya; Rojas, René G.; Tlidi, Mustapha (Springer, 2017)
      Driven damped coupled oscillators exhibit complex spatiotemporal dynamics. An archetype model is the driven damped sine-Gordon equation, which can describe several physical systems such as coupled pendula, extended Josephson ...
    • Localized structures in nonequilibrium systems 
      Descalzi, Orazio; Gutiérrez, Pablo; Tirapegui Zurbano, Enrique (2005)
      We study numerically a prototype equation which arises generically as an envelope equa- tion for a weakly inverted bifurcation associated to traveling waves: The complex quintic Ginzburg{Landau equation. We show six di ...
    • Localized vegetation patterns, fairy circles, and localized patches in arid landscapes 
      Escaff, D.; Fernández Oto, C.; Clerc Gavilán, Marcel; Tlidi, M. (American Physical Society, 2015)
      We investigate the formation of localized structures with varying widths in one- and two-dimensional systems. The mechanism of stabilization is attributed to strongly nonlocal coupling mediated by a Lorentzian type ...
    • Localized waves in a parametrically driven magnetic nanowire 
      Clerc Gavilán, Marcel; Coulibaly, S.; Laroze, D. (EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY, 2012-02)
      The pattern formation in a magnetic wire forced by a transversal uniform and oscillatory magnetic field is studied. This system is described in the continuous framework by the Landau-Lifshitz-Gilbert equation. We find ...
    • Location and Strategies in Stackelberg Security Games with Risk Aversion 
      Chicoisne, Renaud; Ordóñez Pizarro, Fernando Iván; Castro, Daniel (Springer, 2023)
      In Stackelberg security games, a leader locates security resources to protect a set of targets from strategic adversaries that aim to attack these targets after observing the leader’s strategy. In this setting, the leader ...
    • Location Privacy for a Monitoring System of the Quality of Access to Mobile Internet 
      Font, G.; Bustos, J.; Hevia Angulo, Alejandro (2016)
      Location privacy is a concern in mobile networks monitoring systems. We propose a model using homomorphic encryption, where researchers can compute aggregations, learning nothing more about users' location than the result ...
    • Lockdowns lose one third of their impact on mobility in a month 
      Joshi, Yogesh V.; Musalem Said, Andrés Ignacio (Nature Research, 2021)
      As the novel coronavirus (COVID-19) pandemic spread across the world over the past year, many countries imposed lockdowns in the form of stay at home requirements on their citizens to mitigate its spread. We analyze mobility ...
    • LoCuSS: Testing hydrostatic equilibrium in galaxy clusters 
      Smith, G. P.; Mazzotta, P.; Okabe, N.; Ziparo, F.; Mulroy, S. L.; Babul, A.; Finoguenov, A.; McCarthy, I. G.; Lieu, M.; Bahé, Y. M.; Bourdin, H.; Evrard, A. E.; Futamase, T.; Haines, Chris; Jauzac, M.; Marrone, D. P.; Martino, R.; May, P. E.; Taylor, J. E.; Umetsu, K. (Oxford University Press, 2016)
      We test the assumption of hydrostatic equilibrium in an X-ray luminosity selected sample of 50 galaxy clusters at 0.15 < z < 0.3 from the Local Cluster Substructure Survey (LoCuSS). Our weak-lensing measurements of M500 ...
    • LoCuSS: the infall of X-ray groups on to massive clusters 
      Haines, C. P.; Finoguenov, A.; Smith, G. P.; Babul, A.; Egami, E.; Mazzotta, P.; Okabe, N.; Pereira, M. J.; Bianconi, M.; Mcgee, S. L.; Ziparo, F.; Campusano, L. E.; Loyola, C. (Oxford University Press, 2018-07)
      Galaxy clusters are expected to form hierarchically in a Lambda cold dark matter (Lambda CDM) universe, growing primarily through mergers with lower mass clusters and the continual accretion of group-mass haloes. Galaxy ...
    • LoCuSS: the slow quenching of star formation in cluster galaxies and the need for pre-processing 
      Haines, Chris; Pereira, M. J.; Smith, G. P.; Egami, E.; Babul, A.; Finoguenov, A.; Ziparo, F.; McGee, S. L.; Rawle, T. D.; Okabe, N.; Moran, S. M. (IOP Publishing, 2015)
      We present a study of the spatial distribution and kinematics of star-forming galaxies in 30 massive clusters at 0.15 < z < 0.30, combining wide-field Spitzer 24 mu m and GALEX near-ultraviolet imaging with highly complete ...
    • Log-Gamma Polymer Free Energy Fluctuations via a Fredholm Determinant Identity 
      Borodin, Alexei; Corwin, Ivan; Remenik Zisis, Daniel (Springer, 2013)
      We prove that under n1/3 scaling, the limiting distribution as n → ∞of the free energy of Seppäläinen’s log-Gamma discrete directed polymer is GUE Tracy- Widom. The main technical innovation we provide is a general ...
    • Logistic regression and neural network classification of seismic records 
      Vallejos Massa, Javier; McKinnon, S. D. (Elsevier, 2013)
      The identification of seismic records in seismically active mines is examined by considering logistic regression and neural network classification techniques. An efficient methodology is presented for applying these ...
    • Logística humanitaria: modelado y apoyo al diseño de políticas de gestión frente a la prevención, socorro ... 
      Yáñez Sandivari, Luis Ernesto (Universidad de Chile, 2019)
      El presente documento resume el desarrollo de una investigación conducente al grado de Doctor en Sistemas de Ingeniería, Universidad de Chile. Se presenta un análisis exhaustivo de 178 artículos, incluyendo estudios en ...
    • Logros y retos en la implementación del presupuesto por resultados en Ecuador 
      Izquierdo Campoverde, Mariana Ximena (Universidad de Chile, 2021)
      El Ecuador en los últimos años ha llevado a cabo una política de gasto expansiva con un presupuesto anual por sobre los USD 34.000 millones, los cuales se financian principalmente por impuestos - tasas, y financiamiento ...
    • Logueo de alteración potásica y sericítica en el pórfido cuprífero de los sulfatos, Chile Central, usando ... 
      Sánchez Villar, Sebastián Ignacio (Universidad de Chile, 2017)
      El Yacimiento Los Sulfatos (Anglo American), distrito Río Blanco - Los Bronces, es un depósito tipo pórfido cuprífero de clase mundial ubicado a 50 km al noreste de Santiago, Chile central. Presenta mineralización de cobre ...
    • Long baseline observations of the HD 100546 protoplanetary disk with ALMA 
      Peréz Márquez, Sebastián; Casassus Montero, Simón; Hales, Antonio; Marino, Sebastián; Cheetham, Anthony; Zurlo, Alice; Cieza, Lucas; Dong, Ruobing; Alarcón, Felipe; Benítez Llambay, Pablo; Fomalont, Ed; Avenhaus, Henning (IOP, 2020)
      Using the Atacama Large Millimeter/submillimeter Array, we observed the young Herbig star HD 100546, host to a prominent disk with a deep, wide gap in the dust. The high-resolution 1.3 mm continuum observation reveals fine ...
    • Long short-term memory network for future-state prediction in water injection pump 
      Barraza J.F., Bräuning L.F.G., Droguett E.L., Martins M.R. (Research Publishing, Singapore, 2020)