Repositorio Académico de la Universidad de Chile: Recent submissions

Now showing items 38261-38280 of 101786

    • Non-geodesic circular motion of massive spinning test bodies around a Schwarzschild field in the Lagrangian theory 
      Hojman Guiñerman, Sergio; Asenjo, Felipe (Springer New York LLC, 2018)
      Recent interest on studying possible violations of the Equivalence Principle has led to the development of space satellite missions testing it for bodies moving on circular orbits around Earth. This experiment establishes ...
    • Evaluation of MAC protocols for IoT satellite systems 
      Ferrer, Tomás; Céspedes, Sandra; Becerra, Alex (CEUR-WS, 2018)
      The growing development of Internet of Things (Internet of Things) applications and machine-to-machine (M2M) communications has extended throughout the world, including remote areas as well as extreme and unpredictable ...
    • Latitudinal and Longitudinal Patterns of Exhumation in the Andes of North-Central Chile 
      Rodríguez, María; Charrier González, Reynaldo; Brichau, Stephanie; Carretier, Sébastien; Farías, Marcelo; de Parseval, Philippe; Ketcham, Richard (Blackwell Publishing Ltd, 2018)
      New thermochronometric data provide evidence for an along-strike diachronous building of the Andes in north-central Chile (28.5–32°S). Geochronological (U-Pb zircon) and thermochronological (apatite fission track and ...
    • Adaptive computation of the discrete Fréchet distance 
      Barbay, Jérémy (Springer Verlag, 2018)
      The discrete Fréchet distance is a measure of similarity between point sequences which permits to abstract differences of resolution between the two curves, approximating the original Fréchet distance between curves. ...
    • Comparison of path loss models for vehicular communications in TV white spaces 
      Lara, Tomás; Arteaga, Adriana; Céspedes, Sandra (CEUR-WS, 2018)
      All rights reserved. This work presents the main observations obtained from the study of several path loss models in the context of vehicular communications that employ frequency bands of TV White Spaces. We have simulated ...
    • Fiber-based infrared heterodyne technology for the PFI: Development of a prototype test system 
      Besser, F.; Ramos, N.; Rates, A.; Ortega, N.; Sepulveda, S.; Parvex, T.; Piña, M.; Pollarolo, C.; Jara, R.; Espinoza, K.; Rodriguez, A.; Becerra, A.; Martin, P.; Cadiz, M.; Henriquez, N.; Carrasco, J.; San Martin, C.; Rearte, C.; Diaz, J.; Moreno, E.; Michael, E. (SPIE, 2018)
      We present the concept and experimental development of a low-cost near-infrared heterodyne interferometer prototype based on commercial 1.55 μm fiber components. As the most crucial component of it we characterized a novel ...
    • The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Perseus Protostars. VI. Characterizing the ... 
      Tobin, John; Looney, Leslie; Li, Zhi; Sadavoy, Sarah; Dunham, Michael; Segura-Cox, Dominique; Kratter, Kaitlin; Chandler, Claire; Melis, Carl; Harris, Robert; Perez, Laura (Institute of Physics Publishing, 2018)
      We present Atacama Large Millimeter/submillimeter Array observations of multiple protostar systems in the Perseus molecular cloud, previously detected by the Karl G. Jansky Very Large Array. We observe 17 close (<600 au ...
    • WISP: Weighted shortest paths for RDF graphs 
      Tartari, Gonzalo; Hogan, Aidan (CEUR-WS, 2018)
      An important aspect of exploratory search over graph data is to understand what paths connect a given pair of nodes. Since the resulting paths can be manifold, various works propose ranking paths likely to be of interest ...
    • The Impact of Lithium-Ion Battery Polarising Impedance Modelling on End-of-Discharge Prognosis Accuracy 
      Ley, Christopher; Orchard Concha, Marcos (Elsevier B.V., 2018)
      In Lithium-Ion batteries, the polarising impedance is an important characteristic that has been shown to be a complex function of, among others, both the state of charge and the demanded current. Therefore within a prognostic ...
    • Thermal stability of the cu-ceo2 interface on silica and alumina, and its relation with activity in the ... 
      Álvarez, Pablo; Aguila, Gonzalo; Guerrero, Sichem; Araya, Paulo (Sociedad Chilena de Quimica, 2018)
      The effect of the support on the formation of the Cu-CeO2 interface and its thermal stability after calcination at 500, 700 and 900 ºC is studied. The supports used are SiO2 , because of its inert character, and ...
    • Using the Weather Research and Forecasting (WRF) model for precipitation forecasting in an Andean region ... 
      Yáñez-Morroni, Gonzalo; Gironás, Jorge; Caneo, Marta; Delgado, Rodrigo; Garreaud Salazar, René (MDPI AG, 2018)
      The Weather Research and Forecasting (WRF) model has been successfully used in weather prediction, but its ability to simulate precipitation over areas with complex topography is not optimal. Consequently, WRF has problems ...
    • Toward real-time decentralized reinforcement learning using finite support basis functions 
      Lobos-Tsunekawa, Kenzo; Leottau, David; Ruiz del Solar, Javier (Springer Verlag, 2017)
      This paper addresses the design and implementation of complex Reinforcement Learning (RL) behaviors where multi-dimensional action spaces are involved, as well as the need to execute the behaviors in real-time using robotic ...
    • Bus arrival time prediction with limited data set using regression models 
      Kviesis, Armands; Zacepins, Aleksejs; Komasilovs, Vitalijs; Munizaga, Marcela (SciTePress, 2018)
      All rights reserved. The increase of population has intensified everyday rush. Traffic congestions are still a problem in cities and are one of the main cause for public transport delays. City residents and visitors have ...
    • Spectrum of shallow water gravity waves generated by confined two-dimensional turbulence 
      Falcón, Claudio; Knobloch, Edgar (American Physical Society, 2018)
      We apply Lighthill's theory of aeroacoustic sound generation to shallow water gravity waves generated by spatially confined two-dimensional turbulence. We show that the frequency spectrum of surface waves at large distances ...
    • X-ray/UV/optical variability of NGC 4593 with Swift: Reprocessing of X-rays by an extended reprocessor 
      McHardy, I.; Connolly, S.; Horne, K.; Cackett, E.; Gelbord, J.; Peterson, B.; Pahari, M.; Gehrels, N.; Goad, M.; Lira Teillery, Paulina; Arevalo, P.; Baldi, R.; Brandt, N.; Breedt, E.; Chand, H.; Dewangan, G.; Done, C.; Elvis, M.; Emmanoulopoulos, D.; Fausnaugh, M.; Kaspi, S.; Kochanek, C.; Korista, K.; Papadakis, I.; Rao, A.; Uttley, P.; Vestergaard, M.; Ward, M. (Oxford University Press, 2018)
      We report the results of intensive X-ray, UV, and optical monitoring of the Seyfert 1 galaxy NGC 4593 with Swift. There is no intrinsic flux-related spectral change in any variable component with small apparent variations ...
    • Multiwavelength cross-correlations and flaring activity in bright blazars 
      Liodakis, I.; Romani, R.; Filippenko, A.; Kiehlmann, S.; Max-Moerbeck, W.; Readhead, A.; Zheng, W. (Oxford University Press, 2018)
      © 2018 The Author(s). Blazars are known for their energetic multiwavelength flares from radio wavelengths to highenergy γ -rays. In thiswork, we study radio, optical, and γ -ray light curves of 145 bright blazars spanning ...
    • Effect of changing vegetation and precipitation on denudation - Part 1: Predicted vegetation composition ... 
      Werner, Christian; Schmid, Manuel; Ehlers, Todd A.; Fuentes Espoz, Juan; Forrest, Matthew; Liakka, Johan; Maldonado, Antonio; Hickler, Thomas; Steinkamp, Jörg (Copernicus GmbH, 2018)
      Vegetation is crucial for modulating rates of denudation and landscape evolution, as it stabilizes and protects hillslopes and intercepts rainfall. Climate conditions and the atmospheric CO2 concentration, hereafter [CO2], ...
    • Results from the Atacama B-mode Search (ABS) experiment 
      Kusaka, Akito; Appel, John; Essinger-Hileman, Thomas; Beall, James A.; Campusano, Luis E.; Cho, Hsiao; Choi, Steve; Crowley, Kevin; Fowler, Joseph; Gallardo, Patricio; Hasselfield, Matthew; Hilton, Gene; Ho, Shuay; Irwin, Kent; Jarosik, Norman; Niemack, Michael; Nixon, Glen; Nolta, Michael; Page, Lyman; Palma, Gonzalo; Parker, Lucas; Raghunathan, Srinivasan; Reintsema, Carl; Sievers, Jonathan; Simon, Sara; Staggs, Suzanne; Visnjic, Katerina; Yoonh, Ki (Institute of Physics Publishing, 2018)
      The Atacama B-mode Search is an experiment designed to measure the cosmic microwave background polarization at large angular scales (` > 40). It observes at 145 GHz from a site at 5,190 m elevation in northern Chile. The ...
    • A multi-service approach for planning the optimal mix of energy storage technologies in a fully-renewable ... 
      Haas, J.; Cebulla, F.; Nowak, W.; Rahmann, C.; Palma-Behnke, R. (Elsevier Ltd, 2018)
      Energy storage systems (ESS) are a structural solution for the integration of renewable energy systems. To plan the optimal combination of ESS, storage expansion planning approaches are commonly used. They tend to focus ...
    • How Fast Can We Reliably Estimate the Magnitude of Subduction Earthquakes? 
      Leyton, F.; Ruiz Tapia, Sergio; Baez, J.; Meneses, G.; Madariaga, R. (Blackwell Publishing Ltd, 2018)
      Fast and reliable characterization of earthquakes can provide vital information to the population, even reducing the effects of strong shaking produced by them. In this study, we explore the minimum time required to estimate ...