M
Matias Diaz
Researcher at University of Santiago, Chile
Publications - 121
Citations - 1441
Matias Diaz is an academic researcher from University of Santiago, Chile. The author has contributed to research in topics: Modular design & Converters. The author has an hindex of 18, co-authored 95 publications receiving 996 citations. Previous affiliations of Matias Diaz include Carnegie Institution for Science & University of Chile.
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Journal ArticleDOI
K2-287b: an Eccentric Warm Saturn transiting a G-dwarf.
Andrés Jordán,Rafael Brahm,Néstor Espinoza,Cristián E. Cortés,Matias Diaz,Holger Drass,Thomas Henning,James S. Jenkins,Matias I. Jones,Markus Rabus,Felipe Rojas,Paula Sarkis,Maja Vučković,A. Zapata,M. Soto,Gáspár Á. Bakos,Daniel Bayliss,Waqas Bhatti,Z. Csubry,R. Lachaume,Víctor Moraga,Blake Pantoja,David J. Osip,Avi Shporer,Vincent Suc,Sergio Vásquez +25 more
TL;DR: In this article, the discovery of K2-287b, a Saturn mass planet orbiting a G-dwarf with a period of $P \approx 15$ days, was reported.
Journal ArticleDOI
Design of Efficient Off-Grid Solar Photovoltaic Water Pumping System Based on Improved Fractional Open Circuit Voltage MPPT Technique
Ali Hmidet,Umashankar Subramaniam,Rajvikram Madurai Elavarasan,Kannadasan Raju,Matias Diaz,Narottam Das,Kashif Mehmood,Alagar Karthick,M. Muhibbullah,Olfa Boubaker +9 more
TL;DR: In this paper, a simple and efficient off-grid solar photovoltaic (SPV) water pumping system (SPVWPS) is presented, which is based on a DC-DC boost converter, a three-phase DC-AC inverter, and a three phase induction motor coupled to the centrifugal pump.
Journal ArticleDOI
A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887
Sandra V. Jeffers,Stefan Dreizler,John R. Barnes,Carole A. Haswell,Richard P. Nelson,E. Rodríguez,M. J. López-González,Nicolás Morales,Rafael Luque,Rafael Luque,Mathias Zechmeister,Steven S. Vogt,James S. Jenkins,Enric Palle,Enric Palle,Z. M. Berdi ñas,Gavin A. L. Coleman,Gavin A. L. Coleman,Matias Diaz,Ignasi Ribas,Hugh R. A. Jones,R. P. Butler,C. G. Tinney,Jeremy Bailey,Brad D. Carter,Simon J. O'Toole,Robert A. Wittenmyer,Jeffrey D. Crane,Fabo Feng,S. Shectman,Johanna Teske,Ansgar Reiners,Pedro J. Amado,Guillem Anglada-Escudé,Guillem Anglada-Escudé +34 more
TL;DR: Monitoring the nearby red dwarf star GJ 887, Jeffers et al. detected periodic radial velocity signals, indicating the presence of two planets on orbits with periods of about 9 and 22 days and a further candidate planet (see the Perspective by Davies).
Journal ArticleDOI
A Vector Control Strategy to Eliminate Active Power Oscillations in Four-Leg Grid-Connected Converters Under Unbalanced Voltages
TL;DR: A new methodology based on a closed-loop vector control approach, where the active power oscillations at converter side are transformed into a synchronous frame rotating at twice the grid frequency and regulated using the zero-sequence current is proposed.
Journal ArticleDOI
Stellar activity analysis of Barnard's Star: very slow rotation and evidence for long-term activity cycle
B. Toledo-Padrón,B. Toledo-Padrón,J. I. González Hernández,J. I. González Hernández,Cristina Rodríguez-López,A. Suárez Mascareño,Rafael Rebolo,Rafael Rebolo,R. P. Butler,Ignasi Ribas,Guillem Anglada-Escudé,Guillem Anglada-Escudé,E. N. Johnson,Ansgar Reiners,Jose A. Caballero,Andreas Quirrenbach,Pedro J. Amado,Víctor J. S. Béjar,Víctor J. S. Béjar,Juan Carlos Morales,Manuel Perger,S. V. Jeffers,Steven S. Vogt,Johanna Teske,S. Shectman,Jeffrey D. Crane,Matias Diaz,Matias Diaz,Pamela Arriagada,Bradford P. Holden,Jennifer Burt,E. Rodriguez,E. Herrero,Felipe Murgas,Felipe Murgas,Enric Palle,Enric Palle,Nicolás Morales,M. J. López-González,E. Díez Alonso,Mikko Tuomi,Marcin Kiraga,Scott G. Engle,E. F. Guinan,J. B. P. Strachan,F. J. Aceituno,Jesús Aceituno,V. Casanova,Susana Martín-Ruiz,D. Montes,J. L. Ortiz,Alfredo Sota,John Briol,L. Barbieri,I. Cervini,M. Deldem,Franky Dubois,Franz-Josef Hambsch,B. Harris,Cliff Kotnik,Ludwig Logie,Javier Suso López,M. McNeely,Y. Ogmen,L. Pérez,Steve Rau,D. Rodríguez,F. S. Urquijo,S. Vanaverbeke +68 more
TL;DR: In this article, the authors used the Barnard's Star (Gl 699) to carry out a characterization of the stellar activity and the magnetic cycle of the star, since these phenomena induce radial velocity (RV) signals that can be misinterpreted as planetary signals.