https://repositorio.uchile.cl/handle/2250/117687 Artículos de revistas Tue, 14 Apr 2026 12:39:29 GMT 2026-04-14T12:39:29Z https://repositorio.uchile.cl/handle/2250/208108 Mewlen, tornados y trombas en Chile: una lectura geomitológica situada Rondanelli Rojas, Roberto; Bastías Curivil, Cristian Andrés; Silva Tobar, María Ignacia; Charrier González, Reynaldo Hasta antes del enjambre de tornados de mayo de 2019 (Barrett, Marin, y Jacques-Coper; Vicencio, et al.; Marín, Barrett y Pozo) la ocurrencia de tornados o trombas marinas en Chile era mayormente desconocida por la población, e incluso por la comunidad científica. Durante los días 30 y 31 de mayo de 2019, al menos siete tornados fueron reportados en las regiones de Maule, Ñuble, Biobío y Araucanía, en el sur de Chile. Dos tornados atravesaron grandes centros urbanos de la región de Biobío: Los Ángeles el día 30 de mayo de 2019 y Talcahuano-Concepción al día siguiente. Los testimonios gráficos fueron difundidos ampliamente por redes sociales y en medios de comunicación tradicionales (re)estableciéndose entonces los tornados en la memoria colectiva. Estos eventos, que sorprendieron tanto a la población como a especialistas en ciencias atmosféricas, no constituyen un fenómeno enteramente nuevo en el territorio. Los registros históricos dan cuenta de la presencia de los tornados en Chile desde la conquista, con eventos esporádicos que pueden llegar a producir gran destrucción material y muertes, y que han ocurrido principalmente en lo que se considera tradicionalmente el territorio mapuche (Bastías-Curivil, et al.). Sin embargo, la literatura de las ciencias atmosféricas ha prestado escasa atención a la dimensión histórica y cultural de los tornados en Chile. Wed, 01 Jan 2025 00:00:00 GMT https://repositorio.uchile.cl/handle/2250/208108 2025-01-01T00:00:00Z https://repositorio.uchile.cl/handle/2250/199555 Trajectory simulation of emergency vehicles and interactions with surrounding traffic Cortés Carrillo, Cristian Eduardo; Stefoni Escudero, Bruno Amadeo Emergency services play an important role in the life of a city and are subject to constant public scrutiny. Te efcient dispatch of emergency vehicles (EMVs) requires realistic shortest-path algorithms involving the movement of EMVs within an urban network underemergencyconditions. Trip-time estimates used in shortest-path algorithms would be much more precise if it were possible to model more realistically the interactions between EMVs and surrounding trafc, as well as the reactions of other vehicles in the presence of an EMV.Terefore, EMVtrajectories shouldbestudied at themicroscopic level to accurately model the impact of EMV travel along a path shared with other vehicles. In this research, we develop three models to incorporate specifc non-EMVreactionsassociated with changing lanes, mounting the sidewalk, and approaching an intersection, plus two algorithms to actuate trafc lights at signalized intersections. Tese models and algorithms were coded in commercial microscopic trafc simulation software through the implementation of an application programming interface (API) designed to overcome the limitations of the software to realistically simulate disturbed trafc conditions and anomalous nonemergency vehicle driver behaviour observed in the presence of an EMV. Basic information about these real-world efects was gleaned from video footage recorded in Santiago, Chile, by trafc cameras, fre truck-mounted cameras, and truck-originated GPS pulses. To validate the design, a real EMVtrip captured bythe footagewas simulated bythe API.Tesimulationconsiderably reducedthe degreeoferror in delineating the path followed by the EMV compared to the default simulations generated by most commercially available software, thereby demonstrating that the API can provide highly accurate estimates of EMV trip times in an emergency context. Sun, 01 Jan 2023 00:00:00 GMT https://repositorio.uchile.cl/handle/2250/199555 2023-01-01T00:00:00Z https://repositorio.uchile.cl/handle/2250/199160 Young, blue, and isolated stellar systems in the virgo cluster. I. 2D Optical spectroscopy Bellazzini, Michele; Magrini, Laura; Jones, Michael G.; Sand, David J.; Beccari, Giacomo; Cresci, Giovanni; Spekkens, Kristine; Karunakaran, Ananthan; Adams, Elizabeth A. K.; Zaritsky, Dennis; Battaglia, Giuseppina; Seth, Anil; Cannon, John M.; Fuson, Jackson; Inoue, John L.; Mutlu Pakdil, Burçin; Guhathakurta, Puragra; Muñoz Vidal, Ricardo Rodrigo; Bennet, Paul; Crnojević, Denija; Caldwell, Nelson; Strader, Jay; Toloba, Elisa We use panoramic optical spectroscopy obtained with the Very Large Telescope/MUSE to investigate the nature of five candidate extremely isolated low-mass star-forming regions (Blue Candidates; hereafter, BCs) toward the Virgo cluster of galaxies. Four of the five (BC1, BC3, BC4, and BC5) are found to host several H II regions and to have radial velocities fully compatible with being part of the Virgo cluster. All the confirmed candidates have mean metallicity significantly in excess of that expected from their stellar mass, indicating that they originated from gas stripped from larger galaxies. In summary, these four candidates share the properties of the prototype system SECCO 1, suggesting the possible emergence of a new class of stellar systems, intimately linked to the complex duty cycle of gas within clusters of galaxies. A thorough discussion of the nature and evolution of these objects is presented in a companion paper, where the results obtained here from the MUSE data are complemented with Hubble Space Telescope (optical) and Very Large Array (HI) observations. Sat, 01 Jan 2022 00:00:00 GMT https://repositorio.uchile.cl/handle/2250/199160 2022-01-01T00:00:00Z https://repositorio.uchile.cl/handle/2250/199128 Studying star-forming processes at core and clump scales: the case of the young stellar object G29.862 - 0.0044 (Corrigendum) Areal, M. B.; Parón, S.; Fariña, C.; Ortega, M. E.; Celis Peña, M.; Rubio López, Mónica Solange Fri, 01 Jan 2021 00:00:00 GMT https://repositorio.uchile.cl/handle/2250/199128 2021-01-01T00:00:00Z