Browsing by Author "Rojas, F."

Now showing 1 - 12 of 12
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    Classifying CMB time-ordered data through deep neural networks
    (2020) Rojas, F.; Maurin, Loïc Benjamin; Dünner Planella, Rolando; Pichara Baksai, Karim Elías
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    Decoupled PI Controllers Based on Pulse-Frequency Modulation for Current Sharing in Multi-Phase LLC Resonant Converters
    (2021) Moreno, M.; Pereda Torres, Javier Eduardo; Rojas, F.; Dominguez-Lopez, I.
    The LLC series resonant converter has emerged as a solution to applications requiring power conversion with isolation, reduced volume and high efficiency, such as PV systems and EV chargers. However, the LLC resonant converter is limited in power, so it requires a multi-phase configuration in order to provide higher currents. This configuration connects the outputs of two or more LLC converters in parallel, increasing the output current but introducing imbalance and circulating currents due to the mismatch and tolerance values of components in each resonant tank. This paper proposes a simple PI control scheme to compensate the current imbalance and eliminate circulating currents generated when several LLC resonant converters are connected in parallel. Unlike reported current sharing methods, the proposed control scheme is based on multiple current control loops operating independently, using the switching frequency of each parallel-connected unit as a degree of freedom of the overall converter. The proposed control scheme has been successfully validated under simulations and experimental assessment, implementing two resonant tanks with ±5% tolerance of parameters, providing excellent steady-state and transient performance.
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    HATS-17b : A TRANSITING COMPACT WARM JUPITER IN A 16.3 DAY CIRCULAR ORBIT
    (2016) Brahm, R.; Jordán Colzani, Andrés Cristóbal; Bakos G.; Penev K.; Espinoza Pérez, Néstor; Rabus, Markus; Hartman J.; Bayliss D.; Ciceri S.; Zhou G.; Mancini, L.; Tan, T.; De Val, M.; Bhatti, W.; Csubry, Z.; Henning, T.; Schmidt, B; Rojas, F.; Suc, V.; Lazar, J.; Papp, I.; Sari, P.
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    HD 1397b : A Transiting Warm Giant Planet Orbiting A V = 7.8 mag Subgiant Star Discovered by TESS
    (2019) Brahm Scott, Rafael; Espinoza Pérez, Néstor; Jordán Colzani, Andrés Cristóbal; Henning, T.; Sarkis, P.; Jones Fernández, Matías Ignacio; Diaz, M.R.; Jenkins, J.S.; Vanzi, Leonardo; Zapata, Abner; Petrovich Balbontín, Cristóbal; Kossakowski, D.; Rabus, Markus; Rojas, F.; Torres, P.
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    Linear Control applied to a non-isolated bidirectional DC-DC converter with Interleave technique powered by variable sources
    (IEEE, 2019) Salgado, J.; Rojas, F.; Pereda Torres, Javier Eduardo; Díaz, M.; Gatica, Gabriel N.
    In this article, a linear control strategy is presented applied to a Synchronous Buck converter, which allows N sub-converters to operate in parallel, operating in Interleave mode, balancing the currents in each of the sub-converters and maintaining their dynamic response invariant over a wide range of operation, even when their DC links vary as it would be in a system with electric batteries. Simulation results validating this behavior, using variable DC sources are presented and discussed in this article.
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    MOONS: The New Multi-Object Spectrograph for the VLT
    (2020) Cirasuolo, M.; Fairley, A.; Rees, P.; González, O. A.; Taylor, W.; Maiolino, R.; Afonso, J.; Evans, C.; Flores, H.; Lilly, S.; Oliva, E.; Paltani, S.; Vanzi, L.; Abreu, M.; Accardo, M.; Adams, N.; Álvarez Méndez, D.; Amans, J. -P.; Amarantidis, S.; Atek, H.; Atkinson, D.; Banerji, M.; Barrett, J.; Barrientos, F.; Bauer, F.; Beard, S.; Béchet, C.; Belfiore, A.; Bellazzini, M.; Benoist, C.; Best, P.; Biazzo, K.; Black, M.; Boettger, D.; Bonifacio, P.; Bowler, R.; Bragaglia, A.; Brierley, S.; Brinchmann, J.; Brinkmann, M.; Buat, V.; Buitrago, F.; Burgarella, D.; Burningham, B.; Buscher, D.; Cabral, A.; Caffau, E.; Cardoso, L.; Carnall, A.; Carollo, M.; Castillo, R.; Castignani, G.; Catelan, Márcio; Cicone, C.; Cimatti, A.; Cioni, M. -R. L.; Clementini, G.; Cochrane, W.; Coelho, J.; Colling, M.; Contini, T.; Contreras, R.; Conzelmann, R.; Cresci, G.; Cropper, M.; Cucciati, O.; Cullen, F.; Cumani, C.; Curti, M.; Da Silva, A.; Daddi, E.; Dalessandro, E.; Dalessio, F.; Dauvin, L.; Davidson, G.; de Laverny, P.; Delplancke-Ströbele, F.; De Lucia, G.; Del Vecchio, C.; Dessauges-Zavadsky, M.; Di Matteo, P.; Dole, H.; Drass, H.; Dunlop, J.; Dünner, R.; Eales, S.; Ellis, R.; Enriques, B.; Fasola, G.; Ferguson, A.; Ferruzzi, D.; Fisher, M.; Flores, M.; Fontana, A.; Forchi, V.; Francois, P.; Franzetti, P.; Gargiulo, A.; Garilli, B.; Gaudemard, J.; Gieles, M.; Gilmore, G.; Ginolfi, M.; Gomes, J. M.; Guinouard, I.; Gutierrez, P.; Haigron, R.; Hammer, F.; Hammersley, P.; Haniff, C.; Harrison, C.; Haywood, M.; Hill, V.; Hubin, N.; Humphrey, A.; Ibata, R.; Infante, L.; Ives, D.; Ivison, R.; Iwert, O.; Jablonka, P.; Jakob, G.; Jarvis, M.; King, D.; Kneib, J. -P.; Laporte, P.; Lawrence, A.; Lee, D.; Li Causi, G.; Lorenzoni, S.; Lucatello, S.; Luco, Y.; Macleod, A.; Magliocchetti, M.; Magrini, L.; Mainieri, V.; Maire, C.; Mannucci, F.; Martin, N.; Matute, I.; Maurogordato, S.; McGee, S.; Mcleod, D.; McLure, R.; McMahon, R.; Melse, B. -T.; Messias, H.; Mucciarelli, A.; Nisini, B.; Nix, J.; Norberg, P.; Oesch, P.; Oliveira, A.; Origlia, L.; Padilla, N.; Palsa, R.; Pancino, E.; Papaderos, P.; Pappalardo, C.; Parry, I.; Pasquini, L.; Peacock, J.; Pedichini, F.; Pello, R.; Peng, Y.; Pentericci, L.; Pfuhl, O.; Piazzesi, R.; Popovic, D.; Pozzetti, L.; Puech, M.; Puzia, T.; Raichoor, A.; Randich, S.; Recio-Blanco, A.; Reis, S.; Reix, F.; Renzini, A.; Rodrigues, M.; Rojas, F.; Rojas-Arriagada, Á.; Rota, S.; Royer, F.; Sacco, G.; Sanchez-Janssen, R.; Sanna, N.; Santos, P.; Sarzi, M.; Schaerer, D.; Schiavon, R.; Schnell, R.; Schultheis, M.; Scodeggio, M.; Serjeant, S.; Shen, T. -C.; Simmonds, C.; Smoker, J.; Sobral, D.; Sordet, M.; Spérone, D.; Strachan, J.; Sun, X.; Swinbank, M.; Tait, G.; Tereno, I.; Tojeiro, R.; Torres, M.; Tosi, M.; Tozzi, A.; Tresiter, E.; Valenti, E.; Valenzuela Navarro, Á.; Vanzella, E.; Vergani, S.; Verhamme, A.; Vernet, J.; Vignali, C.; Vinther, J.; Von Dran, L.; Waring, C.; Watson, S.; Wild, V.; Willesme, B.; Woodward, B.; Wuyts, S.; Yang, Y.; Zamorani, G.; Zoccali, M.; Bluck, A.; Trussler, J.
    MOONS is the new Multi-Object Optical and Near-infrared Spectrograph currently under construction for the Very Large Telescope (VLT) at ESO. This remarkable instrument combines, for the first time, the collecting power of an 8-m telescope, 1000 fibres with individual robotic positioners, and both low- and high-resolution simultaneous spectral coverage across the 0.64-1.8 μm wavelength range. This facility will provide the astronomical community with a powerful, world-leading instrument able to serve a wide range of Galactic, extragalactic and cosmological studies. Construction is now proceeding full steam ahead and this overview article presents some of the science goals and the technical description of the MOONS instrument. More detailed information on the MOONS surveys is provided in the other dedicated articles in this Messenger issue....
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    Phase-shifted Pulse Width Modulation with alternate zeros voltage for parallel connection of H-Bridges for High-Current Low-Voltage applications
    (IEEE, 2019) Verdugo, D.; Rojas, F.; Lillo, J.; Diaz, M.; Pereda Torres, Javier Eduardo; Gatica, Gabriel N.
    Phase-Shifted Modulation (PSM) applied to multilevel converters is an effective method for reducing the output THD. In this paper, a new unipolar PSM method is proposed to control internal circulating current of a high-current low-voltage power converter, composed of parallel connected H- Bridges. The proposed method reduces the H-bridge currents distortions and the power losses of the overall converter. Simulation results comparing the standard unipolar modulation with the proposed unipolar modulation technique are performed to demonstrate its effectiveness.
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    Proper motions in the VVV Survey: Results for more than 15 million stars across NGC 6544
    (2017) Contreras Ramos, Rodrigo Andrés; Zoccali, Manuela; Rojas, F.; Rojas Arriagada, A.; Gárate, M.; Huijse, P.; Gran, F.; Valcarce Bravo, Aldo Alfonso Raúl; Estévez, P. A.; Minniti, D.
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    Reactive oxygen species trigger motoneuron death in non-cell-autonomous models of als through activation of c-Abl signaling
    (2015) Rojas, F.; Hernández Trejo, Diego Eduardo; Martínez Saavedra, Alexis; Álvarez Rojas, Alejandra
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    Solid State Transformers : Concepts, Classification, and Control
    (2020) Shamshuddin, M. A.; Rojas, F.; Cardenas, R.; Pereda Torres, Javier Eduardo; Diaz, M.; Kennel, R.
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    TOI-150b and TOI-163b : two transiting hot Jupiters, one eccentric and one inflated, revealed by TESS near and at the edge of the JWST CVZ
    (2019) Kossakowski, D.; Espinoza, N.; Brahm Scott, Rafael; Jordán Colzani, Andrés Cristóbal; Henning, T.; Rojas, F.; Kurster, M.; Sarkis, P.; Schlecker, M.; Pozuelos, F. J.; Barkaoui, K.; Jehin, E.; Gillon, M.; Matthews, E.; Horch, E. P.; Ciardi, D. R.; Rossfield, I. J. M.; Gonzales, E.; Howell, S. B.; Matson, R.; Schlieder, J.; Jenkins, J.; Ricker, G.; Seager, S.; Winn, J. N.; Li, J.; Rose, M. E.; Smith, J. C.; Dynes, S.; Morgan, E.; Villaseñor, J. N.; Charbonneau, D.; Jaffe, T.; Yu, L.; Bakos, G.; Bhatti, W.; Bouchy, F.; Collins, K. A.; Collins, K. I.; Csubry, Z.; Evans, P.; Jensen, E. L. N.; Lovis, C.; Marmier, M.; Nielsen, L. D.; Osip, D.; Pepe, F.; Relles, H. M.; Segransan, D.; Shporer, A.; Stockdale, C.; Suc, V.; Turner, O.; Udry, S.
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    TOI-677b : A Warm Jupiter (P=11.2 days) on an Eccentric Orbit Transiting a Late F-type Star
    (2020) Jordán Colzani, Andrés Cristóbal; Brahm Scott, Rafael; Espinoza, N.; Henning, T.; Jones Fernández, Matías Ignacio; Kossakowski, D.; Sarkis, P.; Trifonov, T.; Rojas, F.; Torres, P.; Drass, Holger; Nandakumar, S.; Barbieri, M.; Davis, A.; Wang, S. H.; Bayliss, D.; Bouma, L.; Dragomir, D.; Eastman, J. D.; Daylan, T.; Guerrero, N.; Barclay, T.; Ting, E. B.; Henze, C. E.; Ricker, G.; Vanderspek, R.; Latham, D. W.; Seager, S.; Winn, J.; Jenkins, J. M.; Wittenmyer, R. A.; Bowler, B. P.; Crossfield, I.; Horner, J.; Kane, S. R.; Kielkopf, J. F.; Morton, T. D.; Plavchan, P.; Tinney, C. G.; Addison, B.; Mengel, M. W.; Okumura, J.; Shahaf, S.; Mazeh, T.; Rabus, Markus; Shporer, A.; Ziegler, C.; Mann, A. W.; Hart, R.