Browsing by Title Artículos de revistas

Now showing items 3786-3805 of 7547

    • Long-term foundation response to repetitive loading 
      Pastén Puchi, César; Shin, Hosung; Santamarina, J. Carlos (American Society of Civil Engineers, 2014)
      Repetitive loading can induce volumetric and shear strain accumulation in soils and affect the long-term performance of engineered and natural geosystems.Ahybrid numerical scheme based on theFEMis implemented to analyze ...
    • Long-term magnetic anomalies and their possible relationship to the latest greater Chilean earthquakes in ... 
      Cordaro Cárdenas, Enrique Guillermo; Venegas Aravena, Patricio; Laroze, David (Copernicus Gesellschaft MBH, 2021)
      Several magnetic measurements and theoretical developments from different research groups have shown certain relationships with worldwide geological processes. Secular variation in geomagnetic cutoff rigidity, ...
    • Long-term monitoring of the archetype Seyfert galaxy MCG-6-30-15: X-ray, optical and near-IR variability ... 
      Lira Teillery, Paulina; Arevalo, P.; Uttley, P.; McHardy, I.; Videla, L. (Royal Astronomical Society, 2015)
      We present long-term monitoring of MCG-6-30-15 in X-rays, optical and near-IR wavelengths, collected over 5 yr of monitoring. We determine the power spectrum density of all the observed bands and show that after taking ...
    • Long-term persistence of the floating bull kelp Durvillaea antarctica from the South-East Pacific: Potential ... 
      Tala, Fadia; López, Boris A.; Velásquez, Marcel; Jeldres, Ricardo; Macaya, Erasmo C.; Mansilla, Andrés; Ojeda, Jaime; Thiel, Martin (Elsevier Ltd, 2019)
      Current knowledge about the performance of floating seaweeds as dispersal vectors comes mostly from mid latitudes (30°–40°), but phylogeographic studies suggest that long-distance dispersal (LDD) is more common at high ...
    • Long-term spatiotemporal variability in high andean wetlands in northern Chile 
      Fuente Stranger, Alberto Patricio de la; Meruane Naranjo, Carolina Beatriz; Suárez, Francisco (Elsevier, 2021)
      High Andean wetlands of the elevated plateaus of the Andes Mountains of Chile, Argentina, Peru and Bolivia are true oases that sustain life in this arid region. Despite their ecological value, they have been rarely studied ...
    • Long-term stellar activity variations and their effect on radial-velocity measurements 
      Costes, Jean C.; Watson, Christopher; de Mooij, Ernst; Saar, Steven H.; Dumusque, Xavier; Cameron, Collier; Phillips, David F.; Günther, Maximilian N.; Jenkins, James Stewart; Mortier, Annelies; Thompson, Andrew P. G. (Oxford Univ Press, England, 2021)
      Long-term stellar activity variations can affect the detectability of long-period and Earth-analogue extrasolar planets. We have, for 54 stars, analysed the long-term trend of five activity indicators: logR HK, the ...
    • Longest Increasing Subsequences of Randomly Chosen Multi-Row Arrays 
      Kiwi Krauskopf, Marcos; Soto San Martín, José (Cambridge University Press, 2015)
      To Philippe Flajolet, a mathematical discontinuity, a tamer of singularities. A two-row array of integers an = a1 a2 ... an b1 b2 ... bn is said to be in lexicographic order if its columns are in lexicographic order (where ...
    • 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 ...
    • 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 ...