Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 19488-19507 of 20545

    • The PHANGS-MUSE survey Probing the chemo-dynamical evolution of disc galaxies 
      Emsellem, Eric; Schinnerer, Eva; Santoro, Francesco; Belfiore, Francesco; Pessa, Ismael; McElroy, Rebecca; Blanc Mendiberri, Guillermo Alberto Neville; Congiu, Enrico; Groves, Brent; Ho, I-Ting; Kreckel, Kathryn; Razza, Alessandro; Sánchez Blázquez, Patricia; Egorov, Oleg; Faesi, Chris; Klessen, Ralf S.; Leroy, Adam K.; Meidt, Sharon; Querejeta, Miguel; Rosolowsky, Erik; Scheuermann, Fabian; Anand, Gagandeep S.; Barnes, Ashley T.; Beslic, Ivana; Bigiel, Frank; Boquien, Mederic; Cao, Yixian; Chevance, Melanie; Dale, Daniel A.; Eibensteiner, Cosima; Glover, Simon C. O.; Grasha, Kathryn; Henshaw, Jonathan D.; Hughes, Annie; Koch, Eric W.; Kruijssen, J. M. Diederik; Lee, Janice; Liu, Daizhong; Pan, Hsi-An; Pety, Jerome; Saito, Toshiki; Sandstrom, Karin M.; Schruba, Andreas; Sun, Jiayi; Thilker, David A.; Usero, Antonio; Watkins, Elizabeth J.; Williams, Thomas G. (EDP Sciences, 2022)
      We present the PHANGS-MUSE survey, a programme that uses the MUSE integral field spectrograph at the ESO VLT to map 19 massive (9.4< log(M/M-circle dot)< 11.0) nearby (D less than or similar to 20 Mpc) star-forming disc ...
    • The physical and kinematical structure of massive and dense cold cores 
      Servajean Bergoeing, Elise Marie Germaine (Universidad de Chile, 2019)
      A pesar de los esfuerzos enfocados en el estudio de la formación de estrellas de alta masa, no tenemos un claro entendimiento de cuales son los procesos involucrados. Para entender mejor estos fenómenos necesitamos ...
    • The polarized signal from broad emission lines in AGNs 
      Lira, P.; Goosmann, R. W.; Kishimoto, M.; Cartier, R. (Oxford Univ Press, 2020)
      Using the STOKES Monte Carlo radiative transfer code, we revisit the predictions of the spectropolarimetric signal from a disc-like broad emission line region (BLR) in type I active galactic nuclei due to equatorial ...
    • The position of distractors in multiple-choice test items: the strongest precede the weakest 
      Lions Maitre, Séverin; Monsalve, Carlos; Dartnell Roy, Pablo Ricardo Gabriel; Godoy, María Inés; Córdova, Nora; Jiménez, Daniela; Blanco, María Paz; Ortega, Gabriel; Lemarié, Julie (Frontiers Media, 2021)
      Middle bias has been reported for responses to multiple-choice test items used in educational assessment. It has been claimed that this response bias probably occurs because test developers tend to place correct responses ...
    • The prevalence and audience reach of food and beverage advertising on Chilean television according to ... 
      Correa, Teresa; Reyes, Marcela; Smith Taillie, Lindsey P.; Dillman Carpentier, Francesca R. (Cambridge University Press, 2019)
      © The Authors 2018.Objective In the light of Chile's comprehensive new restriction on unhealthy food marketing, we analyse food advertising on Chilean television prior to the first and final phases of implementation of the ...
    • The principle of similitude in biology: From allometry to the formulation of dimensionally homogenous ‘Laws’ 
      Escala, Andrés (Springer Netherlands, 2019)
      © 2019, Springer Nature B.V. Meaningful laws of nature must be independent of the units employed to measure the variables. The principle of similitude (Rayleigh, Nature 95:66–68, 1915) or dimensional homogeneity, states ...
    • The problem of incomplete data in SPARQL 
      Hernández Hernández, Daniel Ricardo (Universidad de Chile, 2020)
      La información incompleta es uno de los mayores desafíos para la gestión de datos en la Web. Los datos en son incompletos en la Web por varias razones: porque hay datos que se desconocen, porque es ocultada por privacidad, ...
    • THE PROPER MOTION OF THE MAGELLANIC CLOUDS. II. NEW RESULTS FOR FIVE SMALL MAGELLANIC CLOUD FIELDS 
      Costa Hechenleitner, Edgardo; Méndez Bussard, René Alejandro; Pedreros, Mario H.; Moyano, Maximiliano; Gallart, Carme; Noël, Noelia (IOP PUBLISHING, 2011-04)
      We present new results from a ground-based program to determine the proper motion of the Magellanic Clouds (MCs) relative to background quasars (QSOs), being carried out with the Irenee du Pont 2.5 m telescope at Las ...
    • The protonation state of an evolutionarily conserved histidine modulates domainswapping stability of FoxP1 
      Medina, Exequiel; Villalobos, Pablo; Coñuecar, Ricardo; Ramírez-Sarmiento, César A.; Babul, Jorge (Nature Publishing Group, 2019)
      Forkhead box P (FoxP) proteins are members of the versatile Fox transcription factors, which control the timing and expression of multiple genes for eukaryotic cell homeostasis. Compared to other Fox proteins, they can ...
    • The Quality of Employment (QoE) in nine Latin American countries: A multidimensional perspective 
      Sehnbruch, Kirsten; González Soto, Pablo; Apablaza, Mauricio; Méndez, Rocío; Arriagada, Verónica (Elsevier, 2020)
      This paper proposes a methodology for measuring the quality of employment from a multidimensional and public policy perspective in Latin American developing countries (Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, ...
    • The QUEST-La Silla AGN Variability Survey: Connection between AGN Variability and Black Hole Physical Properties 
      Sánchez Sáez, Paula Andrea; Lira Teillery, Paulina; Mejía Restrepo, Julián; Ho, L.; Arévalo, P.; Kim, M.; Cartier, R.; Coppi, P. (Institute of Physics Publishing, 2018)
      We present our statistical analysis of the connection between active galactic nuclei (AGN) variability and physical properties of the central supermassive black hole (SMBH). We constructed optical light curves using data ...
    • The radio structure of the narrow-line Seyfert 1 Mrk 783 with VLBA and e-MERLIN 
      Congiu, E.; Kharb, P.; Tarchi, A.; Berton, M.; Caccianiga, A.; Chen, S.; Crepaldi, L.; Di Mille, F.; Järvelä, E.; Jarvis, M. E.; Mura, G. la; Vietri, A. (Oxford University Press, 2020)
      In this paper, we present the analysis of new radio and optical observations of the narrow-line Seyfert 1 galaxy Mrk 783. 1.6 GHz observations performed with the e-MERLIN interferometer confirm the presence of the diffuse ...
    • The rayleigh fading channel prediction via deep learning 
      Liao, Run-Fa; Wen, Hong; Wu, Jinsong; Song, Huanhuan; Pan, Fei; Dong, Lian (Wiley-Hindawi, 2018)
      This paper presents a multi-time channel prediction system based on backpropagation (BP) neural network with multi-hidden layers, which can predict channel information effectively and benefit for massive MIMO performance, ...
    • The red dwarf pair GJ65 AB: inflated, spinning twins of Proxima Fundamental parameters from PIONIER, NACO, ... 
      Kervella, P.; Mérand, A.; Ledoux, C.; Demory, B.-O.; Le Bouquin, J.-B. (EDP Sciences, 2016)
      The nearby red dwarf binary GJ65 AB (UV + BL Ceti, M5.5Ve + M6Ve) is a cornerstone system to probe the physics of very low-mass stars. The radii of the two stars are currently known only from indirect photometric estimates, ...
    • The Red MSX Source survey: distribution and properties of a sample of massive young stars 
      Urquhart, J. S.; Moore, T. J. T.; Hoare, M. G.; Lumsden, S. L.; Oudmaijer, R. D.; Rathborne, Jill; Mottram, J. C.; Davies, B.; Stead, J. J. (2011)
      The Red MSX Source (RMS) survey has identified a large sample of massive young stellar objects and ultra compact HII regions from a sample of ∼2000 MSX and Two Micron All Sky Survey (2MASS) colour selected sources. Using ...
    • The reduction of Fe-bearing copper slag for its use as a catalyst in carbon oxide hydrogenation to methane. ... 
      Fuentes, Ismael; Ulloa, Claudia; Jimenéz, Romel; García, Ximena (Elsevier, 2020)
      Reduction of Fe-phases in a slag from the copper smelting process is studied for its use as a catalyst in methanation of carbon oxide (CO). This material contains 36.4 wt% Fe and the main Fe-phases in its fresh and reduced ...
    • The relation between star formation rate and stellar mass of galaxies at z ∼ 1 − 4 
      Katsianis, Antonios; Tescari, E.; Wyithe, J. S. B. (Cambridge University Press, 2016)
      The relation between the star-formation Rate and stellar mass (M-star) of galaxies represents a fundamental constraint on galaxy formation, and has been studied extensively both in observations and cosmological hydrodynamic ...
    • The relation between trace element composition of Cu-(Fe) Sulfides and hydrothermal alteration in a porphyry ... 
      Rivas Romero, Constanza Alejandra; Reich Morales, Martín Herbert; Barra Pantoja, Luis Fernando; Gregory, Daniel; Pichott, Sergio (MDPI, 2021)
      Porphyry Cu-Mo deposits are among the world’s largest source of Cu, Mo, and Re, and are also an important source of other trace elements, such as Au and Ag. Despite the fact that chalcopyrite, bornite, and pyrite are the ...
    • The Relationship Between Molecular GAS, H I, and Star Formation in the Low-Mass, Low-Metallicity Magellanic Clouds 
      Jameson, Katherine E.; Bolatto, Alberto D.; Leroy, Adam K.; Meixner, Margaret; Roman Duval, Julia; Gordon, Karl D.; Hughes, Annie; Israel, Frank P.; Rubio López, Mónica; Indebetouw, Remy; Madden., Suzanne C.; Bot, Caroline; Hony, Sach; Cormier, Diane; Pellegrini, Eric W.; Galametz, Maud; Sonneborn, George (2016)
      The Magellanic Clouds provide the only laboratory to study the effects of metallicity and galaxy mass on molecular gas and star formation at high (similar to 20 pc) resolution. We use the dust emission from HERITAGE Herschel ...
    • The relationships between tectonics, climate and exhumation in the Central Andes (18-36 degrees S): Evidence ... 
      Stalder, Nadja F.; Herman, Frederic; Fellin, Maria Giuditta; Coutand, Isabelle; Aguilar, Germán; Reiners, Peter W.; Fox, Matthew (Elsevier, 2020)
      The Central Andes between 18 degrees S and 36 degrees S latitude strike north-south for 2000 km along the Chilean subduction margin, cross several climate zones from hyperarid to humid and exhibit mean elevations in excess ...