Mostrando registros 1-20 de 3990

    • The virial factor and biases in single epoch black hole mass determinations 

      Mejía Restrepo, Julián; Lira Teillery, Paulina; Netzer, Hagai; Trakhtenbrot, Benny; Capellupo, Daniel (Frontiers media SA, 2018)
      Accurately determining the masses of supermassive black holes is crucial to understand their evolution and the establishment of their relationship with their host galaxy properties. Beyond the local universe, the single ...
    • The domino problem on groups of polynomial growth 

      Ballier, Alexis; Stein, Maya (European Mathematical Society, 2018)
      We conjecture that a finitely generated group has a decidable domino problem if and only if it is virtually free. We show this is true for all virtually nilpotent finitely generated groups (or, equivalently, groups of ...
    • The next generation transit survey (NGTS) 

      Wheatley, Peter J.; West, Richard G.; Goad, Michael R.; Jenkins, James Stewart; Erikson, Anders; Soto, Maritza (Oxford University Press, 2018)
      We describe the Next Generation Transit Survey (NGTS), which is a ground-based project searching for transiting exoplanets orbiting bright stars. NGTS builds on the legacy of previous surveys, most notably WASP, and is ...
    • Rings and gaps in the disc around Elias 24 revealed by ALMA 

      Dipierro, G.; Ricci, L.; Pérez Muñoz, Laura; Lodato, G.; Alexander, R. D.; Laibe, G.; Andrews, S.; Carpenter, J. M.; Chandler, C. J.; Greaves, J. A.; Hall, C.; Henning, T.; Kwon, W.; Linz, H.; Mundy, L.; Sargent, A.; Tazzari, M.; Testi, L.; Wilner, D. (Oxford University Press, 2018)
      We present Atacama Large Millimeter/sub-millimeter Array (ALMA) Cycle 2 observations of the 1.3-mm dust continuum emission of the protoplanetary disc surrounding the T Tauri star Elias 24 with an angular resolution of ...
    • NGTS-1b: a hot Jupiter transiting an M-dwarf 

      Bayliss, Daniel; Gillen, Edward; Eigmueller, Philipp; Jenkins, James Stewart; Soto, Maritza (Oxford University Press, 2018)
      We present the discovery of NGTS-1b, a hot Jupiter transiting an early M-dwarf host (T-eff,(*) = 3916 (+71)(-63) K) in a P = 2.647 d orbit discovered as part of the Next Generation Transit Survey (NGTS). The planet has a ...
    • Recycling trachyte waste from the quarry to the brick industry: effects on physical and mechanical properties, and durability of new bricks 

      Coletti, Chiara; Maritan, Lara; Cultrone, Giuseppe; Dalconi, Maria Chiara; Hein, Anno; Molina, Eduardo; Mazzoli, Claudio (Elsevier, 2018)
      This work examined the possibility of recycling trachyte waste as temper for preparing new types of bricks, thus reducing disposal costs and requirements for increasingly vulnerable raw materials, ultimately reducing ...
    • Reverberation mapping of High - z, High - luminosity quasars 

      Lira Teillery, Paulina; Botti, Ismael; Kaspi, Shai; Netzer, Hagai (Frontiers media SA, 2018)
      We present Reverberation Mapping results after monitoring a sample of 17 high-z, high-luminosity quasars for more than 10 years using photometric and spectroscopic capabilities. Continuum and line emission flux variability ...
    • Performance evaluation of mass transfer correlations in the GFMA process: a review with perspectives to the design 

      Estay, Humberto; Troncoso, Elizabeth; Ruby Figueroa, Rene; Romero, Julio (Elsevier, 2018)
      Gas filled membrane absorption process (GFMA), or hollow fiber gas membranes process (HFGM) can replace two units operations (absorption and stripping) in a unique stage based on membrane contactors. But its application ...
    • Over-accumulation of astaxanthin in Haematococcus pluvialis through chloroplast genetic engineering 

      Galarza, Janeth I.; Gimpel, Javier A.; Rojas, Verónica; Arredondo Vega, Bertha O.; Henríquez, Vitalia (Elsevier, 2018)
      The carotenoid biosynthesis pathway of Haematococcus pluvialis has been genetically modified to overproduce astaxanthin, a red pigment of high commercial value. The endogenous phytoene desaturase coding sequence (pds) has ...
    • Non rectifiable delone sets in SOL and other solvable groups 

      Dymarz, Tullia; Navas, Andre S. (Indiana University Mathematics Journal, 2018)
      Given a lattice Gamma subset of SOL, we show there is a uniformly discrete coarsely dense subset D subset of Gamma that is not bi-Lipschitz equivalent to Gamma. We also prove similar results for lattices in certain higher ...
    • Chilean megathrust earthquake recurrence linked to frictional contrast at depth 

      Moreno, M.; Li, S.; Melnick, D.; Bedford, J. R.; Baez, J. C.; Motagh, M.; Metzger, S.; Vajedian, S.; Sippl, C.; Gutknecht, B. D.; Contreras Reyes, Eduardo; Deng, Z.; Tassara, A.; Oncken, O. (Nature Publishing Group, 2018)
      Fundamental processes of the seismic cycle in subduction zones, including those controlling the recurrence and size of great earthquakes, are still poorly understood. Here, by studying the 2016 earthquake in southern ...
    • Observing the linked depletion of dust and CO gas at 0.1–10 au in disks of intermediate-mass stars 

      Banzatti, A.; Garufi, A.; Kama, M.; Benisty, M.; Brittain, S.; Pontoppidan, K. M.; Rayner, J. (EDP Sciences, 2018)
      We report on the discovery of correlations between dust and CO gas tracers of the 0.1–10 au region in planet-forming disks around young intermediate-mass stars. The abundance of refractory elements on stellar photospheres ...
    • Improving battery voltage prediction in an electric bicycle using altitude measurements and kernel adaptive filters 

      Tobar Henríquez, Felipe Arturo; Castro, Iván; Silva Sánchez, Jorge; Orchard Concha, Marcos (Elsevier, 2018)
      The time-varying nature of consumption patterns is critical in the development of reliable electric vehi- cles and real-time schemes for assessing energy autonomy. Most of these schemes use battery voltage observations as ...
    • Generation of intermittent gravitocapillary waves via parametric forcing 

      Castillo, Gustavo; Falcón Beas, Claudio (American Physical Society, 2018)
      We report on the generation of an intermittentwave field driven by a horizontallymovingwave maker interacting with Faraday waves. The spectrum of the local gravitocapillary surface wave fluctuations displays a power law in ...
    • Direct economic return to government of public geoscience information investments in Chile 

      Gildemeister, Martin; Jara, J. Joaquín; Lagos, Gustavo; Marquardt, Carlos; Espinoza, Felipe (Elsevier, 2018)
      This article presents the first attempt to evaluate the direct economic return of the provision of public geoscience information in Chile. To achieve this goal the study uses multiplier effect ratios through the value ...
    • Crystallinity and lowering band gap induced visible light photocatalytic activity of TiO2/CS (Chitosan) nanocomposites 

      Saravanan, R.; Aviles, J.; Gracia Caroca, Francisco; Mosquera, E.; Kumar Guptac, Vinod (Elsevier, 2018)
      The inhibition of electrons-holes recombination and enhancement of visible light photocatalytic activitywere accomplished by the synthesized TiO2/CS nanocomposites system. In this present work, the differentweight ratio ...
    • Architecting E-Coaching systems: a first step for dealing with their intrinsic design complexity 

      Ochoa, Sergio Fabián; Gutiérrez Figueroa, Francisco Javier (IEEE Computer Society, 2018)
      E-coaching systems are a highly valuable asset for promoting healthier lifestyles. However, the design of these systems is intrinsically complex. This article proposes a loosely coupled architecture to support the modeling ...
    • Record breaking climate anomalies lead to severe drought and environmental disruption in western Patagonia in 2016 

      Garreaud Salazar, René (Inter Research Science Center, 2018)
      Traditionally a temperate and hyper-humid region, western Patagonia experienced its most severe drought during the summer and fall of 2016. Along with precipitation deficits larger than 50% there was a similar reduction ...
    • Periodic solutions to a cahn hilliard willmore equation in the plane 

      Malchiodi, Andrea; Mandel, Rainer; Rizzi, Matteo (Springer, 2018)
      In this paper we construct entire solutions to the phase field equation of Willmore type in the Euclidean plane, where W(u) is the standard double-well potential . Such solutions have a non-trivial profile that shadows a ...
    • Discovery of a point-like source and a third spiral arm in the transition disk around the Herbig Ae star MWC 758 

      Reggiani, M.; Christiaens, V.; Absil, O.; Barraza, M. (EDP Sciences, 2018)
      Context. Transition disks offer the extraordinary opportunity to look for newly born planets and to investigate the early stages of planet formation. Aims. In this context we observed the Herbig A5 star MWC 758 with ...