Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 19568-19587 of 20545

    • The territorial pedagogical experimentation and the democratization of the educational system. Lessons from ... 
      Rubio, Graciela; Osandón, Luis; Quinteros, Francisca (Fundacao Cesgranrio, 2019)
      A democratizing and decentralized experience of educational change based on experimental education is analyzed. This experience integrated training, cultural and health aspects, the participation of the community and the ...
    • The test case of HD 26965: difficulties disentangling weak doppler signals from stellar activity 
      Díaz, Matias R.; Jenkins, James Stewart; Tuomi, Mikko; Butler, R. Paul; Soto, Maritza G.; Teske, Johanna K.; Feng, Fabo; Shectman, Stephen A.; Arriagada, Pamela; Crane, Jeffrey D.; Thompson, Ian B.; Vogt, Steven S. (IOP Publishing Ltd, 2018)
      We report the discovery of a radial velocity signal that can be interpreted as a planetary-mass candidate orbiting the K dwarf HD 26965, with an orbital period of 42.364 +/- 0.015 days, or alternatively, as the presence ...
    • The TOP-SCOPE survey of planck galactic cold clumps: survey overview and results of an exemplar source, ... 
      Liu, Tie; He, JinHua; Bronfman Aguiló, Leonardo; Garay Brignardello, Guido; Lo, N.; Mardones Pérez, Diego (IOP Publishing Ltd, 2018)
      The low dust temperatures (< 14 K) of Planck Galactic cold clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase of star formation. "TOP-SCOPE" is a joint survey program targeting ...
    • The tramos project updated: enhanced sample of transiting exoplanets, strategies, and analysis 
      Cortés Zuleta, Pía Gabriela (Universidad de Chile, 2019)
      El proyecto Transit Monitoring in the South (TraMoS) busca realizar seguimiento fotométrico de exoplanetas transitantes conocidos. Este proceso provee no sólo información acerca del planeta transitante, sino también sobre ...
    • The transcription factor ZEB1 promotes chemoresistance in prostate cancer cell lines 
      Orellana-Serradell, Octavio; Herrera, Daniela; Castellón, Enrique A.; Contreras, Héctor R (NLM (Medline), 2019)
      One of the factors promoting tumoral progress is the abnormal activation of the epithelial-mesenchymal transition (EMT) program which has been associated with chemoresistance in tumoral cells. The transcription factor zinc ...
    • The Trumpler 14 photodissociation region in the Carina Nebula 
      Brooks, Kate J.; Cox, P.; Schneider, N.; Storey, J. W. V.; Poglitsch, A.; Geis, N.; Bronfman Aguiló, Leonardo (EDP SCIENCES, 2003-12)
      We report the results of observations of the fine- structure emission lines [ CII] 158 mu m and [ OI] 63 mu m using FIFI on the Kuiper Airborne Observatory ( KAO) and the Long Wavelength Spectrometer ( LWS) on board ISO, ...
    • The turning arcs: a computationally efficient algorithm to simulate isotropic vector-valued Gaussian random ... 
      Alegría, Alfredo; Emery, Xavier; Lantuéjoul, Christian (Springer, 2020)
      Random fields on the sphere play a fundamental role in the natural sciences. This paper presents a simulation algorithm parenthetical to the spectral turning bands method used in Euclidean spaces, for simulating scalar- ...
    • The two-sided game of Googol and sample-based prophet inequalities 
      Epstein Von Loebenstein, Boris Alexander (Universidad de Chile, 2020)
      El problema de la secretaria o el juego de Googol son modelos clásicos para problemas de selección en línea que han recibido atención significativa en las últimas cinco décadas. En este trabajo consideramos una variante ...
    • The type Iax supernova, SN 2015H A white dwarf deflagration candidate 
      Magee, M. R.; Kotak, R.; Sim, S. A.; Kromer, M.; Rabinowitz, D.; Smartt, S. J.; Baltay, C.; Campbell, H. C.; Chen, T. W.; Fink, M.; Gal Yam, Avishay; Galbany, Lluis; Hillebrandt, W.; Inserra, C.; Kankare, E.; Le Guillou, L.; Lyman, J. D.; Maguire, K.; Pakmor, R.; Ropke, F. K.; Ruiter, A. J.; Seitenzahl, I. R.; Sullivan, M.; Valenti, S.; Young, D. R. (EDP Sciences, 2016)
      We present results based on observations of SN 2015H which belongs to the small group of objects similar to SN 2002cx, otherwise known as type Iax supernovae. The availability of deep pre-explosion imaging allowed us to ...
    • The Type II supernovae 2006V and 2006au: two SN 1987A-like events 
      Taddia, F.; Stritzinger, M. D.; Sollerman, J.; Phillips, M. M.; Anderson, Joseph P.; Ergon, M.; Folatelli, Gastón; Fransson, C.; Freedman, W.; Hamuy Wackenhut, Mario; Morrell, N.; Pastorello, A.; Persson, S. E.; González, S. (EDP SCIENCES S A, 2012-01)
      Context. Supernova 1987A revealed that a blue supergiant (BSG) star can end its life as a core-collapse supernova (SN). SN 1987A and other similar objects exhibit properties that distinguish them from ordinary Type II ...
    • The type IV secretion system of ICEAfe1: Formation of a conjugative pilus in Acidithiobacillus ferrooxidans 
      Flores Ríos, Rodrigo; Moya Beltrán, Ana; Pareja-Barrueto, Claudia; Arenas-Salinas, Mauricio; Valenzuela, I. Sebastián; Orellana Orellana, Omar; Quatrini, Raquel (Frontiers Media S.A., 2019)
      Copyright © 2019 Flores-Ríos, Moya-Beltrán, Pareja-Barrueto, Arenas-Salinas, Valenzuela, Orellana and Quatrini.The dispersal of mobile genetic elements and their gene cargo relies on type IV secretion systems (T4SS). In ...
    • The ultrasound-assisted synthesis of effective monodisperse nickel nanoparticles: magnetic characterization ... 
      Vargas, E.; Romero Saez, M.; Denardin, J. C.; Gracia Caroca, Francisco (2016)
      Homogeneous nickel nanoparticles were synthesized and supported over m-ZrO2 through a simple ultrasonic process. The microscopic and magnetic characterization of nanoparticles showed high quality and effective monodisperse ...
    • The unexpectedly large proportion of high-mass starforming cores in a Galactic mini-starburst 
      Motte, F.; Nomy, T.; Louvet, F.; Marsh, K.A.; Bontemps, S.; Whitworth, A. P.; Men’shchikov, A.; Nguyen Luong6, Q.; Csengeri, T.; Maury, A. J.; Gusdorf, A.; Chapillon, E.; Könyves, V.; Schilke, P.; Duarte Cabral, A.; Didelon, P.; Gaudel, M. (Springer Nature, 2018)
      Understanding the processes that determine the stellar Initial Mass Function (IMF) is a critical unsolved problem, with profound implications for many areas of astrophysics1. In molecular clouds, stars are formed in cores, ...
    • The University of Tokyo Atacama Observatory 6.5m Telescope: Overview and construction status 
      Yoshii Y., Doi M., Miyata T., Kohno K., Tanaka M., Minezaki T., Sako S., Morokuma T., Tanabe T., Hatsukade B., Konishi M., Kamizuka T., Asano K., Sameshima H., Kato N., Numata M., Takahashi H., Aoki T., Soyano T., Tarusawa K., Yoshikawa K., Motohara K., Tamura Y., Koshida S., Handa T., Bronfman L., Ruiz M., Hamuy M., Mendez R., Escala A. (SPIE, 2020)
    • The University of Tokyo Atacama Observatory 6.5m telescope: Permafrost hazards and the high-altitude ... 
      Yoshikawa K., Yoshii Y., Doi M., Miyata T., Kohno K., Tanaka M., Motohara K., Minezaki T., Sako S., Morokuma T., Tanabe T., Hatsukade B., Konishi M., Takahashi H., Kamizuka T., Sameshima H., Kato N., Numata M., Aoki T., Soyano T., Tarusawa K., Schorghofer N., Mena G. (SPIE, 2020)
    • The upGREAT 1.9 THz multi-pixel high resolution spectrometer for the SOFIA Observatory 
      Risacher, C.; Guesten, R.; Stutzki, J.; Huebers, H.; Bell, A.; Buchbender, C.; Buechel, D.; Csengeri, T.; Graf, U.; Heyminck, S.; Higgins, R.; Honingh, C.; Jacobs, K.; Klein, B; Okada, D.; Parikka, A.; Puetz, P.; Reyes Guzmán, Nicolás Andrés; Ricken, O.; Riquelme, D.; Simon, R.; Wiesemeyer, H. (EDP Sciences, 2016)
      We present a new multi-pixel high resolution (R greater than or similar to 10(7)) spectrometer for the Stratospheric Observatory for Far-Infrared Astronomy (SOFIA). The receiver uses 2 x 7-pixel subarrays in orthogonal ...
    • The upper crustal magma plumbing system of the Pleistocene Apacheta-Aguilucho Volcanic Complex area ... 
      Taussi, Marco; Godoy, Benigno; Piscaglia, Filippo; Morata Céspedes, Diego; Agostini, Samuele; Le Roux, Petrus; González Maurel, Osvaldo; Gallmeyer, Guillermo; Menzies, Andrew; Renzulli, Alberto (Elsevier B.V., 2019)
      The evolution of the magma plumbing system of the Pleistocene Apacheta-Aguilucho Volcanic Complex area (Altiplano-Puna Volcanic Complex, northern Chile) was investigated through petrographic, geochemical and isotopic studies ...
    • The use of artificial intelligence in tribology—a perspective 
      Rosenkranz, Andreas; Marian, Max; Profito, Francisco J.; Aragón, Nathan; Shah, Raj (MDPI, 2021)
      Artificial intelligence and, in particular, machine learning methods have gained notable attention in the tribological community due to their ability to predict tribologically relevant parameters such as, for instance, the ...
    • The use of questions to scaffold narrative coherence and cohesion 
      Mora Silva, Macarena; Cain, Kate (Blackwell Publishing Ltd, 2019)
      We examined the quality of 4- to 6-year-olds' production of narratives from picture sequences. Children (N = 81) first viewed a narrative picture sequence and then completed the narrative production task in each of two ...
    • The value of network investment coordination to reduce environmental externalities when integrating renewables: ... 
      Matamala, Carlos; Moreno, Rodrigo; Sauma, Enzo (Elsevier Ltd, 2019)
      © 2018 Elsevier LtdThe need to decarbonize the power sector through increased participation of renewable generation has originated an escalating necessity for transmission network investments that can be undertaken by a ...