Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 19626-19645 of 20501

    • Time Decay of the Activity of the Reduction Reaction of NO by CO on a Pd/Al2O3 Catalyst 
      Cortés, Joaquín; Valencia Astorga, Eliana; Aguila, Gonzalo; Orellana, Esteban; Araya Figueroa, Paulo (SPRINGER, 2008-11)
      An experimental study is made of the time decay of activity of the CO-NO reaction on a Pd/Al2O3 looking at the effect on reaction order and apparent activation energy. The optimum kinetics parameters fitting the steady ...
    • Time Dilation In The Light Curve Of The Distant Type Ia Supernova Sn 1995k 
      Leibundgut, B.; Schommer, R.; Phillips, M. M.; Riess, A.; Schmidt, B.; Spyromilio, J.; Walsh, J.; Suntzeff, Nicholas B.; Hamuy Wackenhut, Mario; Maza Sancho, José; Kirshner, R. P.; Challis, P.; Garnavich, P.; Smith, R. C.; Dressler, A.; Ciardullo, R. (The American Astronomical Society, 1996-07-20)
      The light curve of a distant Type Ia supernova acts like a clock that can be used to test the expansion of the universe. SN 1995K, at a spectroscopic redshift of z = 0.479, provides one of the first meaningful data sets ...
    • Time dilation in type Ia supernova spectra at high redshift 
      Blondin, S.; Davis, Tamara M.; Krisciunas, Kevin; Schmidt, Brian P.; Sollerman, J.; Wood-Vasey, W. M.; Becker, A. C.; Challis, P.; Clocchiatti, A.; Damke, G.; Filippenko, Alexei V.; Foley, Ryan J.; Garnavich, Peter M.; Jha, S. W.; Kirshner, Robert P.; Leibundgut, B.; Li, Weidong; Matheson, Thomas; Miknaitis, G.; Narayan, G.; Pignata Libralato, Giuliano; Rest, A.; Riess, A. G.; Silverman, J. M.; Smith, R. C.; Spyromilio, J.; Stritzinger, M.; Stubbs, C. W.; Suntzeff, Nicholas B.; Tonry, J. L.; Tucker, B. E.; Zenteno, A. (UNIV CHICAGO PRESS, 2008-08-01)
      We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on the ESO Very Large Telescope. We use the ...
    • A time discretization scheme of a characteristics method for a fluid–rigid system with discontinuous density 
      San Martín, Jorge; Scheid, Jean-François; Smaranda, Loredana (Elsevier, 2010-08)
      We propose a new characteristics method for the time discretization of a fluid–rigid system in the case when the densities of the fluid and the solid are different. This method is based on a global weak formulation ...
    • Time series photometry of the dwarf planet ERIS (2003 UB313) 
      Carraro, Giovanni; Maris, Michele; Bertin, Daniel; Parisi, M. Gabriela (EDP SCIENCES S A, 2006-12)
      Context. The dwarf planet Eris (2003 UB313, formerly known also as "Xena") is the largest KBO discovered up to now. Despite being larger than Pluto and having many similarities to it, it has not been possible so far to ...
    • Time use modeling: towards an extended framework 
      Rosales Salas, Jorge Agustín (Universidad de Chile, 2015)
      En esta tesis se expande el entendimiento del rol del tiempo en el análisis del comportamiento de los individuos. Primero se sistematiza, organiza y clasifica la literatura de modelamiento de uso de tiempo. Luego, se analiza ...
    • Time use observatory 
      Carrasco, Juan Antonio; Jara Díaz, Sergio; Munizaga Muñoz, Marcela (LOM, 2011)
    • Time use: The role of sleep 
      Jara Díaz, Sergio R.; Rosales Salas, Jorge (Elsevier, 2020)
      Time use models have been used to estimate the value of leisure - one of the components of the value of travel time savings - usually accepting that sleep duration is an exogenous variable. In this paper, we depart from ...
    • Time-delayed nonlocal response inducing traveling temporal localized structures 
      Clerc, MG; Coulibaly, S; Tlidi, M (American Physical Society, 2020)
    • Time-dependent behavior and physical conditions of the LMC planetary nebular N66 
      Peña, M.; Peimbert, M.; Torres Peimbert, S.; Ruiz González, María Teresa; Maza, J. (1995-03-01)
      Optical and UV spectrophotometric data for the planetary nebula N66 in the Large Magellanic Cloud gathered in the 1987-1994 interval are analyzed. The central star, which had a featureless weak continuum, has developed ...
    • Time-dependent Monte Carlo in fissile systems with beta-delayed neutron precursors 
      Romero Barrientos, Jaime Alfonso (Universidad de Chile, 2022)
      En el campo de la física de reactores nucleares, los fenómenos transientes suelen estudiarse usando métodos deterministas o híbridos. Estos métodos requieren de variadas aproximaciones, tales como: discretizaciones de la ...
    • Time-Dependent Rheological Behavior of Starch-Based Thickeners and Herb Infusion Dispersions for Dysphagia ... 
      Martínez, Macarena P.; Troncoso, Elizabeth; Robert Canales, Paz; Quezada, Camilo; Zúñiga, Rommy N. (Wiley-VCH Verlag, 2019)
      © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The causes of dysphagia include neurological conditions and cancer. Swallowing impairment of liquids represents a risk of aspiration, pneumonia, dehydration, and nutritional ...
    • A time-hierarchical microeconomic model of activities 
      López Ospina, Héctor A.; Martínez Concha, Francisco; Cortés Carrillo, Cristián (Springer, 2015)
      The microeconomic approach to explain consumers' behavior regarding the choice of activities, consumption of goods and use of time is extended in this paper by explicitly including the temporal dimension in the choice-making ...
    • Time-of-failure probability mass function computation using the first-passage-time method applied to particle ... 
      Jaramillo F., Valderrama M., Quintero V., Perez A., Orchard M. (Prognostics and Health Management Society, 2020)
    • Time-optimal top-k document retrieval 
      Navarro, Gonzalo; Nekrich, Yakov (Society for Industrial and Applied Mathematics, 2017)
      LetDbe a collection ofDdocuments, which are strings over an alphabet of sizeσ,of total lengthn. We describe a data structure that uses linear space and reportskmost relevantdocuments that contain a query patternP, which ...
    • Time-resolved photometry of the young dipper RX J1604.3-2130A Unveiling the structure and mass transport ... 
      Sicilia Aguilar, A.; Manara, C. F.; De Boer, J.; Benisty, M.; Pinilla, P.; Bouvier, J. (EDP Sciences, 2020)
      Context. RX J1604.3-2130A is a young, dipper-type, variable star in the Upper Scorpius association, suspected to have an inclined inner disk, with respect to its face-on outer disk. Aims. We aim to study the eclipses to ...
    • Time-scale decomposition of price transmission in international markets 
      Fernández Maturana, Viviana (M E SHARPE INC, 2005-07)
      This paper focuses on return spillovers in stock markets at different time scales using wavelet analysis. We look at eight stock indices that comprise the G7 countries, emerging Asia, Western Europe, Eastern Europe and the ...
    • Time-series analysis of earthquake sequences by means of information recognizer 
      Vogel, E. E.; Saravia, G.; Pastén Guzmán, Denisse; Muñoz Gálvez, Víctor (Elsevier, 2017)
      Three seismic sequences of several thousand earthquakes each are analyzed by means of a tunable information recognizer known as wlzip. These sequences are different both in the geographical coverage and the time span, ...
    • Time-variant modal parameters and response behavior of a base-isolated building tested on a shake table 
      Astroza, Rodrigo; Gutiérrez, Gonzalo; Repenning, Christian; Hernández, Francisco (Earthquake Engineering Research Institute, 2018)
      This paper presents the identification of the instantaneous modal properties and the experimental response of a full-scale, five-story base-isolated RC building tested on a shake table. A suite of earthquake motions of ...
    • Timing and duration of hydrothermal activity at the Los Bronces porphyry cluster: an update 
      Deckart, Katja; Silva, W.; Spröhnle, C.; Vela, I. (Springer-Verlag, 2014)
      New geochronological data from the Los Bronces cluster of the Río Blanco-Los Bronces mega-porphyry Cu-Mo district establish a wide range of magmatism, hydrothermal alteration, and mineralization ages, both in terms of ...