Facultad de Ciencias Físicas y Matemáticas: Recent submissions

Now showing items 4581-4600 of 22290

    • Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020 
      Morgado, B. E.; Sicardy, B.; Braga Ribas, F.; Desmars, J.; Gomes Junior, A. R.; Berard, D.; Leiva Espinoza, Rodrigo Andrés; Ortiz, J. L.; Vieira Martins, R.; Benedetti Rossi, G.; Santos Sanz, P.; Camargo, J. I. B.; Duffard, R.; Rommel, F. L.; Assafin, M.; Boufleur, R. C.; Colas, F.; Kretlow, M.; Beisker, W.; Sfair, R.; Snodgrass, C.; Morales, N.; Fernández Valenzuela, E.; Amaral, L. S.; Amarante, A.; Artola, R. A.; Backes, M.; Bath, K. L.; Bouley, S.; Buie, M. W.; Cacella, P.; Colazo, C. A.; Colque, J. P.; Dauvergne, J. L.; Dominik, M.; Emilio, M.; Erickson, C.; Evans, R.; Fabrega Polleri, J.; Garcia Lambas, D.; Giacchini, B. L.; Hanna, W.; Herald, D.; Hesler, G.; Hinse, T. C.; Jacques, C.; Jehin, E.; Jorgensen, U. G.; Machado, D. I.; Maquet, L.; Maury, A.; Melia, R.; Meza, E.; Mondon, B.; Moura, T.; Newman, J.; Payet, T.; Pereira, C. L.; Pollock, J.; Poltronieri, R. C.; Quispe Huaynasi, F.; Reichart, D.; de Santana, T.; Schneiter, E. M.; Sieyra, M. V.; Skottfelt, J.; Soulier, J. F.; Starck, M.; Thierry, P.; Torres, P. J.; Trabuco, L. L.; Unda Sanzana, E.; Yamashita, T. A. R.; Winter, O. C.; Zapata, A.; Zuluaga, C. A. (EDP Sciences, 2021)
      Context. The Centaur (10199) Chariklo has the first ring system discovered around a small object. It was first observed using stellar occultation in 2013. Stellar occultations allow sizes and shapes to be determined with ...
    • Perturbers: SPHERE detection limits to planetary-mass companions in protoplanetary disks 
      Asensio Torres, R.; Henning, Th; Cantalloube, F.; Pinilla, P.; Mesa, D.; Garufi, A.; Jorquera, S.; Gratton, R.; Chauvin, Gael; Szulagyi, J.; van Boekel, R.; Dong, R.; Marleau, G-D; Benisty, Myriam; Villenave, M.; Bergez Casalou, C.; Desgrange, C.; Janson, M.; Keppler, M.; Langlois, M.; Menard, F.; Rickman, E.; Stolker, T.; Feldt, M.; Fusco, T.; Gluck, L.; Pavlov, A.; Ramos, J. (EDP Sciences, 2021)
      The detection of a wide range of substructures such as rings, cavities, and spirals has become a common outcome of high spatial resolution imaging of protoplanetary disks, both in the near-infrared scattered light and in ...
    • Gestión de inventarios de insumos en Agrosuper 
      Ortiz Fuentes, Ignacio Andrés (Universidad de Chile, 2021)
    • Desarrollo de un modelo predictivo para apoyar la gestión de la agenda médica en un Centro Médico 
      Elgueta Gallardo, Bastián Ignacio (Universidad de Chile, 2021)
    • Plan de negocios para prestación de servicios de flotas eléctricas a clientes de la empresa SunRoof Spa 
      Cassinelli Martín, Florencia Lucía (2021)
    • Recomendaciones para ajustar el plan estratégico de la Gerencia de Personas de Agrosuper con foco en el ... 
      Aguirre Cárdenas, Marcela Paz (Universidad de Chile, 2021)
    • Strong algorithms for the ordinal matroid secretary problem 
      Soto San Martín, José Antonio; Turkieltaub, Abner; Verdugo, Víctor (Informs, 2021)
      In the ordinal matroid secretary problem (MSP), candidates do not reveal numerical weights, but the decision maker can still discern if a candidate is better than another. An algorithm alpha is probability-competitive if ...
    • The chemical inventory of the planet-hosting disk PDS 70 
      Facchini, Stefano; Teague, Richard; Bae, Jaehan; Benisty, Myriam; Keppler, Miriam; Isella, Andrea (IOP, 2021)
      As host to two accreting planets, PDS 70 provides a unique opportunity to probe the chemical complexity of atmosphere-forming material. We present ALMA Band 6 observations of the PDS 70 disk and report the first chemical ...
    • On the dynamics of zero-speed solutions for camassa-holm-type equations 
      Alejo, Miguel A.; Cortez, Manuel Fernando; Kwak, Chulkwang; Muñoz, Claudio (Oxford, 2021)
      In this paper, we consider globally defined solutions of Camassa–Holm (CH)-type equations outside the well-known nonzero-speed, peakon region. These equations include the standard CH and Degasperis–Procesi (DP) equations, ...
    • Calidad del agua en Chile: avances, desafíos y perspectivas 
      Pastén, Pablo; Vega, Alejandra; Guerra, Paula; Pizarro, Jaime; Lizama Allende, Katherine Eugenia (Red Interamericana de Academias de Ciencias (IANAS), 2019)
      Mucho se ha avanzado en el conocimiento y protección de la calidad del agua en Chile, pero condiciones hidrológicas y geoquímicas diversas sumadas a presiones del desarrollo urbano, agrícola, industrial y minero hacen ...
    • Water quality 
      Pastén, Pablo; Vega, Alejandra; Lizama Allende, Katherine Eugenia; Guerra, Paula; Pizarro, Jaime (Springer, 2021)
      Water quality in Chile is characterized by diverse hydrochemical environments and their interaction with human activities and natural factors. The main water monitoring network is operated by the DGA (Dirección General de ...
    • Mechanochemical processing of IrO2–Ta2O5: an alternative route for synthesizing Ir and Ir(Ta)O2 solid solution 
      Guzmán, Danny; Dubray, Gabriel; Aguilar, Claudio; Rojas, Paula; Guzmán, Alexis; Soliz, Alvaro; Sepúlveda, Rossana; Espinoza González, Rodrigo Andrés (Elsevier, 2021)
      This paper describes a study exploring milling and subsequent heat treatments of pure IrO2 and Ta2O5 powders. Reactants were milled under Ar atmosphere in a SPEX 8000D mill, with structural, morphological, and compositional ...
    • Semantic segmentation of periocular near-infra-red eye images under alcohol effects 
      Tapia, Juan; López Droguett, Enrique Andrés; Valenzuela, Andrés; Benalcazar Villavicencio, Daniel Patricio; Causa, Leonardo; Busch, Christoph (IEEE-Inst Electrical Electronics Engineers, 2021)
      This paper proposes a new framework to detect, segment, and estimate the localization of the eyes from a periocular Near-Infra-Red iris image under alcohol consumption. This stage will take part in the final solution to ...
    • The challenges of containing SARS-CoV-2 via test-trace-and-isolate 
      Contreras, Sebastián; Dehning, Jonás; Loidolt, Matthias; Zierenberg, Johannes; Spitzner, F. Paul; Urrea Quintero, Jorge H.; Mohr, Sebastián B.; Wilczek, Michael; Wibral, Michael; Priesemann, Viola (Nature, 2021)
      Without a cure, vaccine, or proven long-term immunity against SARS-CoV-2, test-trace-andisolate (TTI) strategies present a promising tool to contain its spread. For any TTI strategy, however, mitigation is challenged by ...
    • Experimental validation of a nested control system to balance the cell capacitor voltages in hybrid MMCs 
      Donoso Cisternas, Sergio Felipe; Cárdenas Dobson, Jesús Roberto Pedro Alejandro; Espinoza, Mauricio; Clare, Jon; Mora, Andrés; Watson, Alan (IEEE, 2021)
      In a hybrid modular multilevel converter (MMC), capacitor voltage balance between the Full-Bridge Sub-Modules (FBSMs) and Half-Bridge Sub-Modules (HBSMs) is only possible when the arm currents are bipolar. For a grid-connected ...
    • The ways of corruption in infrastructure: lessons from the Odebrecht case 
      Campos, Nicolás; Engel, Eduardo; Fischer Barkan, Ronald David; Galetovic, Alexander (American Economic Association, 2021)
    • Seismic rate variations prior to the 2010 Maule, Chile MW 8.8 giant megathrust earthquake 
      Derode, Benoit; Madariaga Meza, Raúl Iván; Campos Muñoz, Jaime Arturo (Nature, 2021)
      The M-W 8.8 Maule earthquake is the largest well-recorded megathrust earthquake reported in South America. It is known to have had very few foreshocks due to its locking degree, and a strong aftershock activity. We analyze ...
    • MADDPG-Based security situational awareness for smart grid with intelligent edge 
      Lei, Wenxin; Wen, Hong; Wu, Jinsong; Hou, Wenjing (MDPI, 2021)
      Advanced communication and information technologies enable smart grids to be more intelligent and automated, although many security issues are emerging. Security situational awareness (SSA) has been envisioned as a potential ...
    • Design and analysis of photonic crystal ring resonator based 6 x 6 wavelength router for photonic integrated ... 
      Thirumaran, Sridarshini; Dhanabalan, Shanmuga Sundar; Sannasi, Indira Gandhi (Wiley, 2021)
      A photonic crystal ring resonator-based 6 x 6 router has been designed and reported. The router is designed using silicon pillars with a refractive index of 3.47 perforated in the air background of refractive index 1 in a ...
    • Prediction of permeate flux in ultrafiltration processes: a review of modeling approaches 
      Quezada, Carolina; Estay Cuenca, Humberto Antonio; Cassano, Alfredo; Troncoso, Elizabeth; Ruby Figueroa, René (MDPI, 2021)
      In any membrane filtration, the prediction of permeate flux is critical to calculate the membrane surface required, which is an essential parameter for scaling-up, equipment sizing, and cost determination. For this reason, ...