Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 6390-6409 of 20545

    • Drenaje ácido natural: el caso de Campos de Ahumada, Chile Central 
      Treskow Guzmán, Vanessa Alejandra (Universidad de Chile, 2019)
      El drenaje ácido, sea natural o asociado a actividades mineras, se debe a la oxidación de sulfuros. Un proceso que genera pH ácidos y, elevadas concentraciones de metales en las aguas, creando un grave problema medioambiental. ...
    • Drift of particles in self-similar systems and its Liouvillian interpretation 
      Barra de la Guarda, Felipe; Gilbert, Thomas; Romo, Mauricio (AMERICAN PHYSICAL SOC, 2006-02)
      We study the dynamics of classical particles in different classes of spatially extended self-similar systems, consisting of (i) a self-similar Lorentz billiard channel, (ii) a self-similar graph, and (iii) a master equation. ...
    • Drifting cavity solitons and dissipative rogue waves induced by time-delayed feedback in Kerr optical ... 
      Tlidi, Mustapha; Panajotov, Krassimir; Ferré, Michel; Clerc Gavilán, Marcel (American Institute of Physics Inc., 2017)
      Time-delayed feedback plays an important role in the dynamics of spatially extended systems. In this contribution, we consider the generic Lugiato-Lefever model with delay feedback that describes Kerr optical frequency ...
    • A driver-heterogeneous car-following model 
      Muñoz Figueroa, José; Cortés Carrillo, Cristián; Martínez Concha, Francisco (Universidad de Chile, 2013)
      We extend and merge Mahut’s and Newell’s car-following models to include heterogeneous desired speeds of vehicles, which becomes relevant for proper mimicking of platoon formation and evolution. The proposed model offers ...
    • Drug rash with eosinophilia and systemic symptoms or dress syndrome. Report of one case Síndrome de dress ... 
      Arellano, Javier; Vargas, Pablo; Martínez, Claudia; Chahuan, Marco; Corredoira, Yamile (Sociedad Medica de Santiago, 2019)
      Drug rash with eosinophilia and systemic symptoms or DRESS Syndrome is a rare, serious and potentially fatal adverse drug reaction. It is characterized by widespread morbilliform and edematous skin lesions, associated with ...
    • Dry eye is matched by increased intrasubject variability in tear osmolarity as confirmed by machine learning ... 
      Cartes, C.; López, D.; Salinas, D.; Segovia, C.; Ahumada, C.; Pérez, N.; Valenzuela F., Manuel A.; Lanza, N.; López Solís, R. O.; Perez, V. L.; Zegers, P.; Fuentes, A.; Alarcón, C.; Traipe, L. (Elsevier Ltd, 2019)
      Objective: Because of high variability, tear film osmolarity measures have been questioned in dry eye assessment. Understanding the origin of such variability would aid data interpretation. This study aims to evaluate ...
    • Dry merger rate and post-merger fraction in the Coma cluster core 
      Cordero, Juan P.; Campusano Brown, Luis; Propris, Roberto de; Haines, Chris; Weinzirl, Tim; Jogee, Shardha (The American Astronomical Society, 2016)
      A We evaluate the dry merger activity in the Coma cluster, using a spectroscopically complete sample of 70 red-sequence (RS) galaxies, most of which (similar to 75%) are located within 0.2R(200) (similar to 0.5 Mpc) from ...
    • Dual convergence for penalty proximal point algorithms in convex programming 
      Álvarez Daziano, Felipe; Carrasco, Miguel; Champion, Thierry (2007)
      We consider an implicit iterative method in convex programming which combines inexact variants of the proximal point algorithm, with parametric penalty functions. We investigate a multiplier sequence which is explicitly ...
    • A Dual Ridge Broadband Orthomode Transducer for the 7-mm Band 
      Reyes Guzmán, Nicolás Andrés; Zorzi Avendaño, Pablo Ignacio; Pizarro Lucero, José; Finger Camus, Ricardo; Mena Mena, Fausto Patricio; Bronfman Aguiló, Leonardo (SPRINGER, 2012-12)
      In this work we present a Q-band waveguide orthomode transducer (OMT) based on a dual ridge structure. It was designed to be used in astronomical projects were an excellent broad-band performance is mandatory. Of particular ...
    • Dualidad y Calidad de Servicio en Redes Inalámbricas 
      Troncoso Solar, Camila Trinidad (Universidad de ChileCyberDocs, 2010)
      Las redes inalámbricas, a pesar de ser tecnologías relativamente recientes, han permitido un gran desarrollo de las telecomunicaciones. Entregan características de movilidad, servicios de voz sobre IP, identificación por ...
    • Duodenogastric biliary reflux assessed by scintigraphic scan in patients with reflux symptoms after sleeve ... 
      Braghetto Miranda, Italo; González, Patricio; Lovera, Cesar; Figueroa-Giralt, Manuel; Piñeres, Amy (Elsevier Inc., 2019)
      Background: Bile reflux is a factor in the appearance of severe esophagitis and Barrett's esophagus, which have been reported after sleeve gastrectomy (SG). Incompetent lower esophageal sphincter and increased gastroesophageal ...
    • Duración de licencias y bienestar social 
      Padilla Belmar, Exequiel Francisco (Universidad de Chile, 2021)
      Cuando se quiere licitar una concesión como las de espectro radioeléctrico surge inmediatamente la pregunta sobre su tiempo de caducidad. Generalmente se asocia una baja (o sub) inversión a una concesión corta, pero con ...
    • Dureza en aguas de consumo humano y uso industrial, impactos y medidas de mitigación. Estudio de caso: Chile 
      Neira Gutiérrez, Marco Antonio (Universidad de ChilePrograma Cybertesis, 2006)
    • Dust and gas in the disk of HL TAURI: surface density, dust settling, and dust-to-gas ratio 
      Pinte, Christophe; Dent, William R. F.; Ménard, Francois; Hales, A.; Hill, T.; Cortes, P.; De Gregorio Monsalvo, Itziar (IOP Publishing, 2016)
      The recent ALMA observations of the disk surrounding HL Tau reveal a very complex dust spatial distribution. We present a radiative transfer model accounting for the observed gaps and bright rings as well as radial changes ...
    • The dust disk and companion of the nearby AGB star L-2 Puppis SPHERE/ZIMPOL polarimetric imaging at visible ... 
      Kervella, Pierre; Montargès, M.; Lagadec, E.; Ridgway, S. T.; Haubois, X.; Girard, J. H.; Ohnaka, K.; Perrin, G.; Gallenne, A. (ESO, 2015)
      The bright southern star L-2 Pup is a particularly prominent asymptotic giant branch (AGB) star, located at a distance of only 64 pc. We report new adaptive optics observations of L2 Pup at visible wavelengths with the ...
    • Dust Emission at 8 and 24 µm as Diagnostics of H II Region Radiative Transfer 
      Oey, M. S.; López Hernández, J.; Kellar, J. A.; Pellegrini, E. W.; Gordon, K. D.; Jameson, K. E.; Li, A.; Madden, S. C.; Meixner, M.; Roman Duval, Julia; Bot, C.; Rubio López, Mónica; Tielens, A. G. G. M. (IOP Publishing Ltd, 2017)
      We use the Spitzer Surveying the Agents of Galaxy Evolution (SAGE) survey of the Magellanic Clouds to evaluate the relationship between the 8 mu m polycyclic aromatic hydrocarbon (PAH) emission, 24 mu m hot dust emission, ...
    • Dust entrainment in photoevaporative winds: densities and imaging 
      Franz, R.; Ercolano, B.; Casassus Montero, Simón Pablo; Picogna, G.; Birnstiel, T.; Pérez, S.; Rab, Ch; Sharma, A. (EDP Sciences, 2022)
      Context. X-ray- and extreme-ultraviolet- (together: XEUV-) driven photoevaporative winds acting on protoplanetary disks around young T-Tauri stars may crucially impact disk evolution, affecting both gas and dust ...
    • Dust fluxes and iron fertilization in Holocene and Last Glacial Maximum climates 
      Lambert, Fabrice; Tagliabue, Alessandro; Shaffer, Gary; Lamy, Frank; Winckler, Gisela; Farías, Laura; Gallardo Klenner, Laura; De Pol-Holz, Ricardo (Amer Geophysical Union, 2015)
      Mineral dust aerosols play a major role in present and past climates. To date, we rely on climate models for estimates of dust fluxes to calculate the impact of airborne micronutrients on biogeochemical cycles. Here we ...
    • Dust modeling of the combined ALMA and SPHERE datasets of HD 163296. Is HD 163296 really a Meeus group II disk? 
      Muro Arena, G. A.; Dominik, C.; Waters, L. B. F. M.; Min, M.; Klarmann, L.; Ginski, C.; Isella, A.; Benisty, Myriam; Pohl, A.; Garufi, A.; Hagelberg, J.; Langlois, M.; Menard, F.; Pinte, Christophe; Sezestre, E.; Van der Plas, Gerrit; Villenave, M.; Delboulbe, A.; Magnard, Y.; Moeller-Nilsson, O.; Pragt, J.; Rabou, P.; Roelfsema, R. (ESO, 2018-06)
      Context. Multiwavelength observations are indispensable in studying disk geometry and dust evolution processes in protoplanetary disks. Aims. We aim to construct a three-dimensional model of HD163296 that is capable ...
    • The dust properties and physical conditions of the interstellar medium in the LMC massive star-forming complex N11 
      Galametz, M.; Hony, S.; Albrecht, M.; Galliano, F.; Cormier, D.; Lebouteiller, V.; Lee, M.; Madden, S.; Bolatto, A.; Bot, C.; Hughes, A.; Israel, F.; Meixner, M.; Oliviera, J.; Paradis, D.; Pellegrini, E.; Roman Duval, Julia; Rubio López, Mónica; Sewilo, M.; Fukui, Y.; Kawamura, A.; Onishi, T. (OXFORD UNIV PRESS, 2016)
      We combine Spitzer and Herschel data of the star-forming region N11 in the Large Magellanic Cloud (LMC) to produce detailed maps of the dust properties in the complex and study their variations with the interstellar-medium ...