Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 11757-11776 of 20342

    • Longest-edge algorithms for size-optimal refinement of triangulations 
      Bedregal, Carlos; Rivara Zúñiga, María Cecilia (Elsevier, 2014)
      Longest-edge refinement algorithms were designed to iteratively refine the mesh for finite-element applications by maintaining mesh quality (assuring a bound on the smallest angle). In this paper we improve geometrical ...
    • Loops and branches of coexistence states in a Lotka-Volterra competition model 
      Lou, Yuan; Martínez Salazar, Salomé; Poláčik, Peter (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-11-15)
      A two-species Lotka-Volterra competition-diffusion model with spatially inhomogeneous reaction tenns is investigated. The two species are assumed to be identical except for their interspecific competition coefficients. ...
    • Lorenz Bifurcation: Instabilities in Quasireversible Systems 
      Clerc Gavilán, Marcel; Coullet, Pierre; Tirapegui Zurbano, Enrique (1999-11-08)
      We describe the two generic instabilities which arise in quasireversible systems and show that their normal forms are the well-known real Lorenz equations and the Maxwell-Bloch equations. We present for the first time ...
    • Los complejos metamórficos paleozoicos de la Cordillera de Vallenar: implicancias en la evolución tectónica ... 
      Álvarez Amado, Javier Ignacio (Universidad de Chile, 2015)
      La evolución geológica del margen occidental de América del Sur es el resultado de procesos tectónicos como subducción de corteza oceánica, magmatismo, acreción, rifting y colisiones continentales. Para comprender esta ...
    • Los desafíos de la coordinación intersectorial: un análisis de la implementación del programa de apoyo al ... 
      Opazo Quezada, David Alexanders (Universidad de Chile, 2015)
      El estudio de caso analiza la incorporación de valor público en los procesos de diseño de políticas orientadas a la protección social de la infancia chilena, que tienen como particularidad el que buscan brindar respuestas ...
    • Lottery design in school choice: using observable student characteristics to improve efficiency 
      Valdevenito Belmar, Martín Andrés (Universidad de Chile, 2022)
      El problema de asignación escolar ha sido teorizado como un problema de emparejamiento de dos lados con una particularidad: a priori, los colegios están indiferentes entre grandes grupos de estudiantes. Esto significa que ...
    • Loving and loathing: portrayals of school mathematics in young adult fiction 
      Darragh, Lisa (Natl Council Teachers Mathematics-NCTM, 2018)
      Images of mathematics and mathematicians are often negative and stereotyped. These portrayals may work to construct our impressions of mathematics and influence students' identity with and future participation in the ...
    • Low case numbers enable long-term stable pandemic control without lockdowns 
      Contreras, Sebastián; Dehning, Jonas; Mohr, Sebastián B.; Bauer, Simón; Spitzner, Paul F.; Priesemann, Viola (Amer Assoc Advancement Science, 2021)
      The traditional long-term solutions for epidemic control involve eradication or population immunity. Here, we analytically derive the existence of a third viable solution: a stable equilibrium at low case numbers, where ...
    • Low dimensional embedding of climate data for radio astronomical site testing in the Colombian Andes 
      Chaparro Molano, Germán; Ramírez Suarez, Oscar Leonardo; Restrepo Gaitán, Oscar Alberto; Martínez Mercado, Alexander Marcial (IOP Publishing Ltd, 2017)
      We set out to evaluate the potential of the Colombian Andes for millimeter-wave astronomical observations. Previous studies for astronomical site testing in this region have suggested that nighttime humidity and cloud cover ...
    • Low frequency ultrasound assisted synthesis of La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) perovskite nanostructures 
      Akbari Fakhrabadi, A.; Sathishkumar, P.; Ramam, K.; Palma, R.; Mangalaraja, R. V. (Elsevier, 2015)
      La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) perovskite nanostructures were synthesised using a 42 kHz ultrasound assisted synthesis technique for the fabrication of electrodes in the intermediate and/or low temperature solid ...
    • Low luminosity Type II supernovae - II. Pointing towards moderate mass precursors 
      Spiro, S.; Pastorello, A.; Pumo, M. L.; Zampieri, L.; Turatto, M.; Smartt, S. J.; Benetti, S.; Cappellaro, E.; Valenti, S.; Agnoletto, I.; Altavilla, G.; Aoki, T.; Brocato, E.; Corsini, E. M.; Di Cianno, A.; Elias Rosa, N.; Hamuy Wackenhut, Mario; Enya, K.; Fiaschi, M.; Folatelli, Gastón; Desidera, S.; Harutyunyan, A.; Howell, D. A.; Kawka, A.; Kobayashi, Y.; Leibundgut, B.; Minezaki, T.; Navasardyan, H.; Nomoto, K.; Mattila, S.; Pietrinferni, A.; Pignata Libralato, Giuliano; Raimondo, G.; Salvo, M.; Schmidt, B. P.; Sollerman, J.; Spyromilio, J.; Taubenberger, S.; Valentini, G.; Vennes, S.; Yoshii, Y. (Royal Astronomical Society, 2014-04-11)
      We present new data for five underluminous Type II-plateau supernovae (SNe IIP), namely SN 1999gn, SN 2002gd, SN 2003Z, SN 2004eg and SN 2006ov. This new sample of low-luminosity SNe IIP (LL SNe IIP) is analysed together ...
    • Low luminosity Type II supernovae – II. Pointing towards moderate mass precursors 
      Spiro, S.; Pastorello, A.; Pumo, M. L.; Zampieri, L.; Turatto, M.; Smartt, S. J.; Benetti, S.; Cappellaro, E.; Valenti, S.; Agnoletto, I.; Altavilla, G.; Aoki, T.; Brocato, E.; Corsini, E. M.; Di Cianno, A.; Eliás Rosa, N.; Hamuy Wackenhut, Mario; Enya, K.; Fiaschi, M.; Folatelli, Gastón; Desidera, S.; Harutyunyan, A.; Howell, D. A.; Kawka, A; Kobayashi, Y.; Leibundgut, B.; Minezaki, T.; Navasardyan, H.; Nomoto, K.; Mattila, S.; Pietrinferni, A.; Pignata Libralato, Giuliano; Raimondo, G.; Salvo, M.; Schmidt, B. P.; Sollerman, J.; Spyromilio, J.; Taubenberger, S.; Valentini, G.; Vennes, S.; Yoshii, Y. (Oxford University Press, 2014)
      We present new data for five underluminous Type II-plateau supernovae (SNe IIP), namely SN 1999gn, SN 2002gd, SN 2003Z, SN 2004eg and SN 2006ov. This new sample of lowluminosity SNe IIP (LL SNe IIP) is analysed together ...
    • Low pathogenic avian influenza (H7N6) virus causing an outbreak in commercial Turkey farms in Chile 
      Jiménez Bluhm, Pedro; Bravo Vásquez, Nicolás; Torchetti, Mia K.; Killian, Mary L.; Livingston, Brandi; Herrera, José; Fuentes, Mauricio; Schultz Cherry, Stacey; Hamilton-West Miranda, Christopher (Taylor and Francis, 2019)
      In late 2016, an H7N6 low pathogenic avian influenza virus outbreak occurred in domestic turkeys in Central Chile. We characterized the genetic and antigenic properties of the outbreak virus and its experimental transmission ...
    • Low temperature synthesis and blue photoluminescence of ZnS submicronparticles 
      Mosquera Vargas, Edgar; Carvajal, Nicolás (Elsevier, 2014)
      Submicronparticles of ZnS were synthesized at low temperature using a top-down fabrication process by ultrasonication. The obtained ZnS particles were characterized by scanning transmission electron microscopy (S/TEM), ...
    • Low-Cost Ka-Band Cloud Radar System for Distributed Measurements within the Atmospheric Boundary Layer 
      Aguirre, Roberto; Toledo, Felipe; Rodríguez, Rafael; Rondanelli Rojas, Roberto; Reyes Guzmán, Nicolás; Díaz Quezada, Marcos (MDPI, 2020)
      Radars are used to retrieve physical parameters related to clouds and fog. With these measurements, models can be developed for several application fields such as climate, agriculture, aviation, energy, and astronomy. In ...
    • Low-cycle fatigue behaviour of reinforcing bars including the effect of inelastic buckling 
      Tripathi, Mayank; Dhakal, Rajesh; Dashti, Farhad; Massone, Leonardo (Elsevier Ltd, 2018)
      Low-cycle fatigue life of Grade 300E and 500E reinforcing bars including the effect of buckling is evaluated. Low-cycle fatigue tests are carried out on un-machined specimens subjected to constant axial strain loading with ...
    • Low-density homogeneous symmetric nuclear matter: Disclosing dinucleons in coexisting phases 
      Arellano Sepúlveda, Hugo; Delaroche, Jean Paul (Springer, 2015)
      The effect of in-medium dinucleon bound states on self-consistent single-particle fields in Brueckner, Bethe and Goldstone theory is investigated in symmetric nuclear matter at zero temperature. To this end, dinucleon bound ...
    • Low-energy ion beam synthesis of ag endotaxial nanostructures in silicon 
      Nagarajappa, Kiran; Guha, Puspendu; Thirumurugan, Arun; Satyam, Parlapalli V.; Bhatta, Umananda M. (Springer, 2018-06)
      Coherently, embedded metal nanostructures (endotaxial) are known to have potential applications concerning the areas of plasmonics, optoelectronics and thermoelectronics. Incorporating appropriate concentrations of metal ...
    • Low-mass star formation in Lynds 1333 
      Kun, M.; Nikolić, Silvana; Johansson, L. E. B.; Balog, Z.; Gáspár, A. (BLACKWELL, 2006-09-11)
      Medium-resolution optical spectroscopy of the candidate young stellar objects associated with the small, nearby molecular cloud Lynds 1333 revealed four previously unknown classical T Tauri stars, two of which are components ...
    • Low-PAPR Hybrid Filter for SC-FDMA 
      Kamal, Shaharyar; Azurdia Meza, César; Tran, Nguyen H.; Lee, Kyesan (IEEE, 2017)
      We propose a hybrid filter to reduce the peak-to-average power ratio (PAPR) on the transmitter side in a long-term evolution uplink scheme. The design of the proposed filter is based on two key components: a finite impulse ...