Browsing by Title Facultad de Ciencias Físicas y Matemáticas
Now showing items 13903-13922 of 20720
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(Universidad de Chile, 2016)Las bases de datos de grafos han recibido mucho interés en los últimos años, debido a sus aplicaciones en temas como las redes sociales o la Web Semántica. En esta tesis estudiamos lenguajes de consultas que poseen las ...
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(EDP Sciences, 2017)Context. The transition disk around the T Tauri star T Cha possesses a large gap, making it a prime target for high-resolution imaging in the context of planet formation. Aims. We aim to find signs of disk evolutionary ...
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(ESO, 2015)Context. HR 4796A is surrounded by a well-structured and very bright circumstellar disc shaped like an annulus with many interesting features: very sharp inner and outer edges, brightness asymmetries, centre offset, and ...
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(2014-04)Context. Gravity modifies the spectral features of young brown dwarfs (BDs). A proper characterization of these objects is crucial for the identification of the least massive and latest-type objects in star-forming regions, ...
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(Elsevier, 2018)Iron oxide-apatite (IOA) or Kiruna-type deposits are an important source of iron and other elements including REE, U, Ag, and Co. The genesis of these deposits remains controversial, with models that range from a purely ...
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(Society for Neuroscience, 2015-04)Wehave identified and characterized a spontaneousBrownNorwayfrom Janvier rat strain (BN-J) presenting a progressive retinal degeneration associated with early retinal telangiectasia, neuronal alterations, and loss of ...
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(American Chemical Society, 2018-07)Nanostructures in silicon (Si) induced by phase transformations have been investigated during the past 50 years. Performances of nanostructures are improved compared to that of bulk counterparts. Nevertheless, the confinement ...
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(EDP. Sciences S.A, 2018-05-25)Debris disks are usually detected through the infrared excess over the photospheric level of their host star. The most favorable stars for disk detection are those with spectral types between A and K, while the statistics ...
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(2008-10)Traditionally, the distance to NGC 4038/39 has been derived from the systemic recession velocity, yielding about 20 Mpc for H0 = 72 km s-1 Mpc-1. Recently, this widely adopted distance has been challenged based on ...
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(Pergamon-Elsevier Science, 2016)Metric indices support efficient similarity searches in metric spaces. This problem is central to many applications, including multimedia databases and repositories handling complex objects. Most metric indices are designed ...
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(EDP SCIENCES S A, 2007-05)Aims. Motivated by the new determination of the distance to the microquasar GRO J1655- 40 by Foellmi et al. ( 2006, A&A, 457, 249), we conduct a detailed study of the distribution of the atomic ( HI) gas, molecular ( CO) ...
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(Cambridge University Press, 2019)This paper presents new excavation data on the Chinchihuapi I (CH-I) locality within the Monte Verde site complex, located along Chinchihuapi Creek in the cool, temperate Valdivian rain forest of south-central Chile. The ...
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(ELSEVIER SCIENCE BV, 2008-04-01)An affine graph is a pair (G, ) where G is a graph and is an automorphism assigning to each vertex of G one of its neighbors. On one hand, we obtain a structural decomposition of any affine graph (G, ) in terms of the ...
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(Institute of Electrical and Electronics Engineers Inc., 2020)
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(1999)Proper motions, positions, nding charts and magnitudes are given for 293 newly discovered stars with proper motions larger than 0.15 arcsec/year. They are located between −5 and −30 in declination, and 13h 30m and ...
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(The Minerals, Metals & Materials Society, 2015)
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(Elsevier, 2016-12-15)We measured noble gas and stable isotopes of the geothermal and hydrothermal fluids of the Caviahue-Copahue Volcanic Complex (CCVC), one of the most important geothermal systems in Argentina/Chile, in order to provide new ...
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(Academic Press, 2019)Increased antibiotic usage is the main risk factor for gut microbiota dysbiosis. In dysbiosis, there is an increased susceptibility to intestinal pathogens, such as Clostridium difficile infection, the leading cause of ...
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(ELSEVIER SCIENCE BV, 2008-11-01)
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(Servicio Nacional Geología Minerva, 2015)La Pacana (central Andes, Northern Chile) is one of the largest resurgent calderas in the world, formed 4 Ma ago during an eruption with a VEI of 8.7. We undertake a gravimetric study to contribute new insights into the ...
