Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 20045-20064 of 20545

    • Unresolved versus resolved: testing the validity of young simple stellar population models with VLT/MUSE ... 
      Kuncarayakti, H.; Galbany, Lluis; Anderson, J. P.; Krühler, T.; Hamuy Wackenhut, Mario (EDP Sciences, 2016)
      Context. Stellar populations are the building blocks of galaxies, including the Milky Way. The majority, if not all, extragalactic studies are entangled with the use of stellar population models given the unresolved nature ...
    • UNSTABLE OBJECTS IN MOLECULAR CLOUD LDN133 
      Gyulbudaghian, A. L.; Méndez Bussard, René Alejandro (Springer, 2013)
      The results of investigation of molecular cloud LDN133 and the unstable objects HHL59, HHL59A, HHL59B and HHL59C connected with it are given. The IR nebula and IR star cluster are also connected with LDN133. It is shown ...
    • Unsteady flow and mass transfer in models of stenotic arteries considering fluid-structure interaction 
      Valencia Musalem, Álvaro; Villanueva, Martín (PERGAMON-ELSEVIER SCIENCE LTD, 2009-10)
      In this work the unsteady non-Newtonian blood flow and mass transfer in symmetric and non-symmetric stenotic arteries are numerically simulated considering the fluid-structure interaction (FSI) using the code ADINA. Blood ...
    • Unsupervised blue whale call detection using multiple time-frequency features 
      Cuevas, Alejandro; Veragua, Alejandro; Español Jiménez, Sonia; Chiang, Gustavo; Tobar, Felipe (IEEE, 2017)
      In the context of bio-acoustic sciences, call detection is a critical task for understanding the behaviour of marine mammals such as the blue whale species (Balaeonoptera musculus) considered in this work. In this paper ...
    • Unsupervised intra-speaker variability compensation based on Gestalt and model adaptation in speaker ... 
      Becerra Yoma, Néstor; Garretón, Claudio; Molina, Carlos; Huenupán, Fernando (ELSEVIER, 2008-11)
      In this paper, an unsupervised intra-speaker variability compensation (ISVC) method based oil Gestalt is proposed to address the problem of limited enrolling data and noise robustness in text-dependent speaker verification ...
    • Unsupervised learning of structure in spectroscopic cubes 
      Araya, M.; Mendoza, M.; Solar, M.; Mardones, D.; Bayo, A. (Elsevier B.V., 2018)
      © 2018 Elsevier B.V. We consider the problem of analyzing the structure of spectroscopic cubes using unsupervised machine learning techniques. We propose representing the target's signal as a homogeneous set of volumes ...
    • Unsupervised method for correlated noise removal for multi-wavelength exoplanet transit observations 
      Dehghan Firoozabadi, Ali; Díaz, Alejandro; Rojo Rubke, Patricio; Soto, Ismael; Mahú Sinclair, Rodrigo; Becerra Yoma, Néstor; Sedaghati, Elyar (IOP Publishing, 2017-07-01)
      Exoplanetary atmospheric observations require an exquisite precision in the measurement of the relative flux among wavelengths. In this paper, we aim to provide a new adaptive method to treat light curves before fitting ...
    • Untangling features in the primordial spectra 
      Palma Quilodrán, Gonzalo (IOP, 2015)
      We discuss the possible existence of features in both the primordial power spectrum and bispectrum generated during a stage of single eld cosmic in ation. We argue that there are two main classes of features: those ...
    • Untitled 
      Bravo, Cristian; Davison, Matt; Jofré Cáceres, René; Maldonado, Sebastián; Weber, Richard (IOS Press, 2015)
    • An unusual eight-coordinated copper complex: bis(4,7-diphenyl-1,10-phenanthroline)dinitratocopper(II) 
      Moreno, Yanko; Hermosilla, Patricio; Garland, María Teresa; Peña, Octavio; Baggio, Ricardo (BLACKWELL, 2006-09)
      In the title monomer, [Cu(NO3)(2)(C24H16N2)(2)], the copper(II) cation is eight-coordinate within an octahedral-like polyhedron. The coordination polyhedron is formed by two chelating diphenylphenanthroline groups that de ...
    • Unusual Galactic HiiRegions at the Intersection of the Central Molecular Zone and the Far Dust Lane 
      Anderson, L. D.; Sormani, M. C.; Ginsburg, Adam; Glover, Simon C.O.; Heywood, I.; Rammala, I.; Schuller, F.; Csengeri, T.; Urquhart, J. S.; Bronfman Aguiló, Leonardo (IOP Publishing, 2020)
      Sgr.E is a massive star formation complex found toward the Galactic center that consists of numerous discrete, compact H II regions. It is located at the intersection between the central molecular zone (CMZ) and the far ...
    • An unusual two-dimensional hydrogen-bonding network in bis(2,9-dimethyl-1,10-phenanthrolin-1-ium) peroxodisulfate ... 
      Harvey, Miguel Angel; Baggio, Sergio; Garland, María Teresa; Baggio, Ricardo (BLACKWELL PUBLISHING, 2008-09)
      The title compound, 2C(14)H(13)N(2)(+)center dot S2O82-center dot 2H(2)O, is a protonated amine salt which is formed from two rather uncommon ionic species, namely a peroxodisulfate (pds(2-)) anion, which lies across a ...
    • Unveiling the beta pictoris system, coupling high contrast imaging, interferometric, and radial velocity data 
      Lagrange, A. M; Rubini, P.; Nowak, M.; Lacour, S.; Grandjean, A.; Boccaletti, A.; Langlois, M.; Delorme, P.; Gratton, R.; Wang, J.; Flasseur, O.; Galicher, R.; Kral, Q.; Meunier, N.; Beust, H.; Babusiaux, C.; Le Coroller, H.; Thebault, P.; Kervella, P.; Zurlo, A.; Maire, A.-L.; Wahhaj, Z.; Amorim, A.; Asensio-Torres, Rubén; Benisty, M.; Berger, J.-P.; Bonnefoy, M.; Brandner, W.; Cantalloube, F.; Charnay, B.; Chauvin, G.; Choquet, É.; Clenet, Y.; Christiaens, V.; Coude du Foresto, V.; de Zeeuw, P.T.; Desidera, S.; Duvert, G.; Eckart, A.; Eisenhauer, F.; Galland, F.; Gao, F.; Garcia, P.; García López, R.; Gendron, E.; Genzel, R.; Gillessen, S.; Girard, J.; Hagelberg, J.; Haubois, X.; Henning, T.; Heissel, G.; Hippler, S.; Horrobin, M.; Janson, M.; Kammerer, J.; Kenworthy, M.; Keppler, M.; Kreidberg, L.; Lapeyrere, V.; Le Bouquin, J.-B.; Lena, P.; Merand, A.; Messina, S.; Molliere, P.; Monnier, J. D.; Ott, T.; Otten, G.; Paumard, T.; Paladini, C.; Perraut, K.; Perrin, G.; Pueyo, L.; Pfuhl, O.; Rodet, L.; Rodríguez Coira, G.; Rousset, G.; Samland, M.; Shangguan, J.; Schmidt, T.; Straub, O.; Straubmeier, C.; Stolker, T.; Vigan, A.; Vincent, F.; Widmann, F.; Woillez, J. (EDP Science, 2020)
      Context. The nearby and young beta Pictoris system hosts a well resolved disk, a directly imaged massive giant planet orbiting at similar or equal to 9 au, as well as an inner planet orbiting at similar or equal to 2.7 au, ...
    • Unveiling the gas-and-dust disk structure in HD 163296 using ALMA observations 
      De Gregorio Monsalvo, Itziar; Ménard, Francois; Dent, W.; Pinte, Christophe; López Saavedra, Celso; Klaassen, C.; Hales, A.; Cortés, P.; Rawlings, M. G.; Tachihara, K.; Testi, L.; Takahashi, S.; Chapillon, E.; Mathews, G.; Juhasz, A.; Akiyama, E.; Higuchi, Aya; Saito, M.; Nyman, L. A.; Phillips, N.; Rodón, J.; Corder, S.; Van Kempen, T. (EDP Sciences, 2013)
      Aims. The aim of this work is to study the structure of the protoplanetary disk surrounding the Herbig Ae star HD 163296. Methods. We used high-resolution and high-sensitivity ALMA observations of the CO(3–2) emission ...
    • Unveiling the role of galactic rotation on star formation 
      Utreras Contreras, José; Becerra, Fernando; Escala Astorquiza, Andrés (The American Astronomical Society, 2016-11-10)
      We study the star formation process at galactic scales and the role of rotation through numerical simulations of spiral and starburst galaxies using the adaptive mesh refinement code Enzo. We focus on the study of three ...
    • Update in the treatment of atopic dermatitis Actualización en el tratamiento de la dermatitis atópica 
      Valenzuela Ahumada, Fernando; Yumha Laiz, Jacob (Ediciones Doyma, S.L., 2019)
    • Updating dynamic noise models with moving magnetoencephalographic (MEG) systems 
      Lopez, Jose David; Tierney, Tim M.; Sucerquia, Angela; Valencia, Felipe; Holmes, Niall; Mellor, Stephanie; Roberts, Gillian; Hill, Ryan M.; Bowtell, Richard; Brookes, Matthew J.; Barnes, Gareth R. (Institute of Electrical and Electronics Engineers Inc., 2019)
      Optically pumped magnetometers have opened many possibilities for the study of human brain function using wearable moveable technology. In order to fully exploit this capability, a stable low-field environment at the sensors ...
    • Upgrading name server credibility: Un breve análisis a los dominios de la zona .cl 
      Marambio Quiroz, Nelson David (Universidad de Chile, 2023)
      El sistema de nombres de dominio permite la traducción de nombres a direcciones IP s. Un componente primordial en él es el resolver, el cual se encarga de entregar la información deseada al usuario. Hoy en día, existen dos ...
    • Uplink transmission policies for lora-based Direct-to-Satellite Iot 
      Álvarez, Guido; Fraire, Juan Andrés; Abdelfadeel Hassan, Khaled; Céspedes Umaña, Sandra Lorena; Pesch, Dirk (IEEE-Inst Electrical Electronics Engineers, 2022)
      Direct-to-Satellite IoT (DtS-IoT) is a promising approach to deliver data transfer services to IoT devices in remote areas where deploying terrestrial infrastructure is not appealing or feasible. In this context, low-Earth ...
    • Upper Cambrian carbonate sequences of the Argentine Precordillera and the Steptoean C-Isotope positive ... 
      Sial, A. N.; Peralta, S.; Ferreira, Viviana; Toselli, A. J.; Aceñolaza, F. G.; Parada Reyes, Miguel; Gaucher, C.; Alonso, R. N.; Pimentel, M. M. (ELSEVIER SCIENCE BV, 2008-07)
      Carbon and Sr-isotope profiles in Upper Cambrian platformal carbonate Formations in the Precordillera, western Argentina (Zonda, La Flecha and La Silla Formations), were constructed for three representative sections: (a) ...