Mostrando registros 1-20 de 3485

    • Physical, chemical and mineralogical evolution of the Tolhuaca geothermal system, southern Andes, Chile: Insights into the interplay between hydrothermal alteration and brittle deformation 

      Sánchez Alfaro, Pablo; Arancibia, Gloria; Reich Morales, Martín; Pérez Flores, Pamela; Cembrano, José; Driesner, Thomas; Lizama, Martín; Rowland, Julie; Morata Céspedes, Diego; Heinrich, Christoph A.; Tardani, Daniele; Campos, Eduardo (Elsevier, 2016)
      In this study, we unravel the physical, chemical and mineralogical evolution of the active Tolhuaca geothermal system in the Andes of southern Chile. We used temperature measurements in the deep wells and geochemical ...
    • New opportunities offered by Cubesats for space research in Latin America: The SUCHAI project case 

      Díaz, M. A.; Zagal Montealegre, Juan; Falcón Beas, Claudio; Stepanova, M.; Valdivia Hepp, Juan; Martínez Ledesma, M.; Díaz Peña, J.; Jaramillo, F. R.; Romanova, N.; Pacheco, E.; Milla, M.; Orchard Concha, Marcos; Silva, J.; Mena, F. P. (Elsevier, 2016)
      During the last decade, a very small-standardized satellite, the Cubesat, emerged as a low-cost fast-development tool for space and technology research. Although its genesis is related to education, the change in paradigm ...
    • Nanoparticle reinforcement in elastomeric polyethylene composites under tensile tests 

      Palza Cordero, Humberto; Rojas, Mauricio; Cortez, Elizabeth; Palma Hillerns, Rodrigo; Zapata, Paula (Elsevier, 2016)
      Two ethylene-1-butene thermoplastic elastomer copolymers were melt mixed with different nanometric fillers such as: multi-walled carbon nanotubes (CNT), thermally reduced graphite oxide (TrGO), and spherical metal ...
    • Elastomeric ethylene copolymers with carbon nanostructures having tailored strain sensor behavior and their interpretation based on the excluded volume theory 

      Palza Cordero, Humberto; Garzón, Cristhian; Rojas, Mauricio (Wiley-Blackwell, 2016)
      Two ethylene/1-butene thermoplastic elastomer copolymers were melt mixed with either multiwalled carbon nanotubes (CNTs) or thermally reduced graphite oxide (TrGO) resulting in piezoresistive composite materials. The effect ...
    • Earthquake dynamics on circular faults: a review 1970–2015 

      Madariaga, Raúl; Ruiz Tapia, Sergio (Springer, 2016)
      We review the development of earthquake dynamics taken from the point of view of the origin of seismic radiation instead of the detailed study of rupture propagation on complex surfaces. Many features of seismic radiation ...
    • Diversity of the 2014 Iquique’s foreshocks and aftershocks: clues about the complex rupture process of a Mw 8.1 earthquake 

      León Ríos, Sergio; Ruiz Tapia, Sergio; Maksymowicz, Andrei; Leyton, Felipe; Fuenzalida, Amaya; Madariaga, Raúl (Springer, 2016)
      We study the foreshocks and aftershocks of the 1 April 2014 Iquique earthquake of Mw 8.1. Most of these events were recorded by a large digital seismic network that included the Northern Chile permanent network and up to ...
    • Interpreting chemical compositions of small scale basaltic systems: A review 

      McGee, Lucy E.; Smith, Ian E. M. (Elsevier, 2016)
      Small scale basaltic magmatic systems occur in all of the major tectonic environments of planet Earth and are characteristically expressed at the Earth's surface as fields of small monogenetic cones. The chemical compositions ...
    • Impact of Warmer Eastern Tropical Pacific SST on the March 2015 Atacama Floods 

      Bozkurt, Deniz; Rondanelli Rojas, Roberto; Garreaud Salazar, René; Arriagada, Andrés (Amer Meteorological Soc, 2016)
      Northern Chile hosts the driest place on Earth in the Atacama Desert. Nonetheless, an extreme precipitation event affected the region on 24-26 March 2015 with 1-day accumulated precipitation exceeding 40mm in several ...
    • Automatic detection of volcano-seismic events by modeling state and event duration in hidden Markov models 

      Bhatti, Sohail Masood; Khan, Muhammad Salman; Wuth, Jorge; Huenupan, Fernando; Curilem, Millaray; Franco, Luis; Becerra Yoma, Néstor (Elsevier, 2016)
      In this paper we propose an automatic volcano event detection system based on Hidden Markov Model (HMM) with state and event duration models. Since different volcanic events have different durations, therefore the state ...
    • Three-dimensional elastic wave speeds in the northern Chile subduction zone: variations in hydration in the supraslab mantle 

      Comte Selman, Diana; Carrizo, Daniel; Roecker, Steven; Ortega Culaciati, Francisco; Peyrat, Sophie (Oxford University Press, 2016)
      We use seismic tomography to investigate the state of the supraslab mantle beneath northern Chile, a part of the Nazca-South America Plate boundary known for frequent megathrust earthquakes and active volcanism. We performed ...
    • Stellar populations in the Carina region The Galactic plane at l=291 degrees 

      Molina-Lera, J.; Baume, G.; Gamen, R.; Costa Hechenleitner, Edgardo; Carraro, G. (EDP Sciences, 2016-08)
      Context. Previous studies of the Carina region have revealed its complexity and richness as well as a significant number of early-type stars. However, in many cases, these studies only concentrated on the central region ...
    • SMASH 1: A very faint globular cluster disrupting in the outer reaches of the LMC? 

      Martín, Nicolás F.; Jungbluth, Valentín; Nidever, David L.; Bell, Eric F.; Besla, Gurtina; Blum, Robert D.; Cioni, María Rosa L.; Conn, Blair C.; Kaleida, Catherine C.; Gallart, Carme; Jin, Shoko; Majewski, Steven R.; Martínez Delgado, David; Monachesi, Antonela; Muñoz Vidal, Ricardo Rodrigo; Noel, Noelia E. D.; Olsen, Knut; Stringfellow, Guy S.; Van der Marel, Roeland P.; Vivas, A. Katherina; Walker, Alistair R.; Zaritsky, Dennis (IOP Publishing, 2016)
      We present the discovery of a very faint stellar system, SMASH 1, that is potentially a satellite of the Large Magellanic Cloud. Found within the Survey of the MAgellanic Stellar History (SMASH), SMASH 1 is a compact (r(h) ...
    • On the klee-saint raymond's characterization of convexity 

      Correa Fontecilla, Rafael; Hantoute, Abderrahim; Pérez Aros, Pedro (SIAM, 2016)
      Using techniques of convex analysis, we provide a direct proof of a recent characterization of convexity given in the setting of Banach spaces in [J. Saint Raymond, J. Nonlinear Convex Anal., 14 (2013), pp. 253-262]. Our ...
    • Numerical and experimental results for the frequency response of plates in similitude 

      Meruane Naranjo, Viviana; De Rosa, Sergio; Franco, Francesco (SAGE, 2016)
      The concept of structural similitude provides a powerful tool for engineers and scientists to predict the behaviour of a structure using an appropriate scaled model. Even tough theoretical and numerical investigations of ...
    • MUSE reveals a recent merger in the post-starburst host galaxy of the TDE ASASSN-14li 

      Prieto, J. L.; Kruehler, T.; Anderson, J. P.; Galbany, Lluis; Kochanek, C. S.; Aquino, E.; Brown, J. S.; Dong, Subo; Forster, F.; Holoien, T. W.-S.; Kuncarayakti, H.; Maureira, J. C.; Rosales Ortega, F. F.; Sánchez, S. F.; Shappee, B. J.; Stanek, K. Z. (IOP Publishing, 2016)
      We present Multi Unit Spectroscopic Explorer (MUSE) integral field spectroscopic observations of the host galaxy (PGC 043234) of one of the closest (z = 0.0206, D similar or equal to 90 Mpc) and best-studied tidal disruption ...
    • Effect of Ag+ and PO43- ratios on the microstructure and photocatalytic activity of Ag3PO4 

      Qin, Jiaqian; Zhang, Xinyu; Yang, Chengwu; Song, Aijun; Zhang, Bing; Saravanan, Rajendran; Ma, Mingzhen; Liu, Riping (World Scientific, 2016-10)
      In this work, the catalyst silver phosphate (Ag3PO4) with different initial ratios of Ag+ and PO43- in aqueous solution was synthesized by a simple precipitation method from AgNO3 and NH4H2PO4 which were used as the ...
    • Groundwater flow and residence time in a karst aquifer using ion and isotope characterization 

      DÍaz Puga, M.; Vallejos, A.; Sola, F.; Daniele, Linda; Molina, L.; Pulido Bosch, A. (Springer, 2016-11)
      In order to identify the origin of the main processes that affect the composition of groundwater in a karstic aquifer, a hydrogeochemical and isotopic study was carried out of water from numerous observation wells located ...
    • Intermediate state created by dopant ions (Mn, Co and Zr) into TiO2 nanoparticles for degradation of dyes under visible light 

      Gnanasekaran, Lalitha; Hemamalini, R.; Saravanan, Rajendran; Ravichandran, K.; Gracia, F.; Gupta, Vinod Kumar (Elsevier, 2016)
      To expand the absorption of pure nanosized TiO2 to the visible light range for improving the photocatalytic efficiency necessary for industrial application, the way of doping different transition metals such as Mn, Co and ...
    • Impact of cosmic variance on the galaxy-halo connection for Ly alpha emitters 

      Mejía Restrepo, Julián; Forero Romero, Jaime (IOP Publishing, 2016)
      In this paper we study the impact of cosmic variance and observational uncertainties in constraining the mass and occupation fraction, f(occ), of dark matter (DM) halos hosting Ly alpha-emitting galaxies (LAEs) at high ...
    • First survey of Wolf-Rayet star populations over the full extension of nearby galaxies observed with CALIFA 

      Miralles Caballero, D.; Díaz, A.; López Sánchez, Á.; Rosales Ortega, F.; Monreal Ibero, A.; Pérez Montero, E.; Kehrig, C.; García Benito, R.; Sánchez, S.; Walcher, C.; Galbany, Lluis; Iglesias Páramo, J.; Vílchez, J.; González Delgado, R.; van de Ven, G.; Barrera Ballesteros, J.; Lyubenova, M.; Meidt, S.; Falcon Barroso, J.; Mast, D.; Mendoza, M. (EDP Sciences, 2016-08)
      The search of extragalactic regions with conspicuous presence of Wolf-Rayet (WR) stars outside the Local Group is challenging task owing to the difficulty in detecting their faint spectral features. In this exploratory ...