Browsing by Author "Gonzalez, R."

Now showing 1 - 12 of 12
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    Baseline brain function in the preadolescents of the ABCD Study
    (2021) Chaarani, B.; Hahn, S.; Allgaier, N.; Adise, S.; Owens, M. M.; Juliano, A. C.; Yuan, D. K.; Loso, H.; Ivanciu, A.; Albaugh, M. D.; Dumas, J.; Mackey, S.; Laurent, J.; Ivanova, M.; Hagler, D. J.; Cornejo, M. D.; Hatton, S.; Agrawal, A.; Aguinaldo, L.; Ahonen, L.; Aklin, W.; Anokhin, A. P.; Arroyo, J.; Avenevoli, S.; Babcock, D.; Bagot, K.; Baker, F. C.; Banich, M. T.; Barch, D. M.; Bartsch, H.; Baskin-Sommers, A.; Bjork, J. M.; Blachman-Demner, D.; Bloch, M.; Bogdan, R.; Bookheimer, S. Y.; Breslin, F.; Brown, S.; Calabro, F. J.; Calhoun, V; Casey, B. J.; Chang, L.; Clark, D. B.; Cloak, C.; Constable, R. T.; Constable, K.; Corley, R.; Cottler, L. B.; Coxe, S.; Dagher, R. K.; Dale, A. M.; Dapretto, M.; Delcarmen-Wiggins, R.; Dick, A. S.; Do, E. K.; Dosenbach, N. U. F.; Dowling, G. J.; Edwards, S.; Ernst, T. M.; Fair, D. A.; Fan, C. C.; Feczko, E.; Feldstein-Ewing, S. W.; Florsheim, P.; Foxe, J. J.; Freedman, E. G.; Friedman, N. P.; Friedman-Hill, S.; Fuemmeler, B. F.; Galvan, A.; Gee, D. G.; Giedd, J.; Glantz, M.; Glaser, P.; Godino, J.; Gonzalez, M.; Gonzalez, R.; Grant, S.; Gray, K. M.; Haist, F.; Harms, M. P.; Hawes, S.; Heath, A. C.; Heeringa, S.; Heitzeg, M. M.; Hermosillo, R.; Herting, M. M.; Hettema, J. M.; Hewitt, J. K.; Heyser, C.; Hoffman, E.; Howlett, K.; Huber, R. S.; Huestis, M. A.; Hyde, L. W.; Iacono, W. G.; Infante, M. A.; Irfanoglu, O.; Isaiah, A.; Iyengar, S.; Jacobus, J.; James, R.; Jean-Francois, B.; Jernigan, T.; Karcher, N. R.; Kaufman, A.; Kelley, B.; Kit, B.; Ksinan, A.; Kuperman, J.; Laird, A. R.; Larson, C.; LeBlanc, K.; Lessov-Schlagger, C.; Lever, N.; Lewis, D. A.; Lisdahl, K.; Little, A. R.; Lopez, M.; Luciana, M.; Luna, B.; Madden, P. A.; Maes, H. H.; Makowski, C.; Marshall, A. T.; Mason, M. J.; Matochik, J.; McCandliss, B. D.; McGlade, E.; Montoya, I; Morgan, G.; Morris, A.; Mulford, C.; Murray, P.; Nagel, B. J.; Neale, M. C.; Neigh, G.; Nencka, A.; Noronha, A.; Nixon, S. J.; Palmer, C. E.; Pariyadath, V; Paulus, M. P.; Pelham, W. E.; Pfefferbaum, D.; Pierpaoli, C.; Prescot, A.; Prouty, D.; Puttler, L., I; Rajapaske, N.; Rapuano, K. M.; Reeves, G.; Renshaw, P. F.; Riedel, M. C.; Rojas, P.; de la Rosa, M.; Rosenberg, M. D.; Ross, M. J.; Sanchez, M.; Schirda, C.; Schloesser, D.; Schulenberg, J.; Sher, K. J.; Sheth, C.; Shilling, P. D.; Simmons, W. K.; Sowell, E. R.; Speer, N.; Spittel, M.; Squeglia, L. M.; Sripada, C.; Steinberg, J.; Striley, C.; Sutherland, M. T.; Tanabe, J.; Tapert, S. F.; Thompson, W.; Tomko, R. L.; Uban, K. A.; Vrieze, S.; Wade, N. E.; Watts, R.; Weiss, S.; Wiens, B. A.; Williams, O. D.; Wilbur, A.; Wing, D.; Wolff-Hughes, D.; Yang, R.; Yurgelun-Todd, D. A.; Zucker, R. A.; Potter, A.; Garavan, H. P.
    The Adolescent Brain Cognitive Development (ABCD) Study(R) is a 10-year longitudinal study of children recruited at ages 9 and 10. A battery of neuroimaging tasks are administered biennially to track neurodevelopment and identify individual differences in brain function. This study reports activation patterns from functional MRI (fMRI) tasks completed at baseline, which were designed to measure cognitive impulse control with a stop signal task (SST; N = 5,547), reward anticipation and receipt with a monetary incentive delay (MID) task (N = 6,657) and working memory and emotion reactivity with an emotional N-back (EN-back) task (N = 6,009). Further, we report the spatial reproducibility of activation patterns by assessing between-group vertex/voxelwise correlations of blood oxygen level-dependent (BOLD) activation. Analyses reveal robust brain activations that are consistent with the published literature, vary across fMRI tasks/contrasts and slightly correlate with individual behavioral performance on the tasks. These results establish the preadolescent brain function baseline, guide interpretation of cross-sectional analyses and will enable the investigation of longitudinal changes during adolescent development.
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    Characterization of individuals at high risk of developing melanoma in Latin America : bases for genetic counseling in melanoma.
    (2016) Puig, S.; Potrony, M.; Cuellar, F.; Puig-Butille, J. A.; Carrera, C.; Aguilera Fuenzalida, Pablo René; Nagore, E.; Garcia-Casado, Z.; Molgó Novell, Montserrat; Kumar, R.; Landman, G.; Costa Soares de Sá, B.; Gargantini Rezze, G.; Facure, L.; Ribeiro de Avila, A. L.; Achatz, M. I.; Carraro, D. M.; Duprat Neto, J. P.; Grazziotin, T. C.; Bonamigo, R.; Rey, M. C.; Balestrini, C.; Morales, E.; Requena, C.; Bakos, R.; Ashton-Prolla, P.; Giugliani, R.; Larre Borges, A.; Barquet, V.; Pérez, J.; Martínez, M.; Cabo, H.; Cohen Sabban, E.; Latorre, C.; Carlos-Ortega, B.; Salas-Alanis, J.; Gonzalez, R.; Olazaran, Z.; Malvehy, J.; Badenas, C.
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    Erratum: Social mindfulness and prosociality vary across the globe (Proceedings of the National Academy of Sciences of the United States of America (2021) 118 (e2023846118) DOI: 10.1073/pnas.2023846118)
    (2021) Van Doesum, N.J.; Murphy, R.O.; Gallucci, M.; Aharonov-Majar, E.; Athenstaedt, U.; Au, W.T.; Bai, L.; Bohm, R.; Bovina, I.; Buchan, N.R.; Chen, X.-P.; Dumont, K.B.; Engelmann, J.B.; Eriksson, K.; Euh, H.; Fiedler, S.; Friesen, J.; Gachter, S.; Garcia, C.; Gonzalez, R.; Graf, S.; Growiec, K.; Guimond, S.; Hrebickova, M.; Immer-Bernold, E.; Joireman, J.; Karagonlar, G.; Kawakami, K.; Kiyonari, T.; Kou, Y.; Michael Kuhlman, D.; Kyrtsis, A.-A.; Lay Martinez, Siugmin Paz; Leonardelli, G.J.; Li, N.P.; Li, Y.; Maciejovsky, B.; Manesi, Z.; Mashuri, A.; Mok, A.; Moser, K.S.; Motak, L.; Netedu, A.; Pammi, C.; Platow, M.J.; Raczka-Winkler, K.; Reinders Folmer, C.P.; Reyna, C.; Romano, A.; Shalvi, S.; Simão, C.; Stivers, A.W.; Strimling, P.; Tsirbas, Y.; Utz, S.; Van der Meij, L.; Waldzus, S.; Wang, Y.; Weber, B.; Weisel, O.; Wildschut, T.; Winter, F.; Wu, J.; Yong, J.C.; Van Lange, P.A.M.
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    Hybrid chitosan-Pluronic F-127 films with BaTiO3: Co nanoparticles: Synthesis and properties
    (2015) Fuentes, S.; Dubo, J.; Barraza, N.; Gonzalez, R.; Veloso, E.
    In this study, magnetic BaTiO3:Co (BT:Co) nanoparticles prepared using a combined sol-gel-hydrothermal technique were dispersed in a chitosan/Pluronic F-127 solution (QO/Pl) to obtain a nanocomposite hybrid films. Nanoparticles and hybrid films were characterized by X-ray powder diffraction. Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and alternating gradient magnetometry (AGM).
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    Hybrid chitosan–Pluronic F-127 films with BaTiO3:Co nanoparticles: Synthesis and properties
    (2015) Fuentes, S.; Dubo, J.; Barraza, N.; Gonzalez, R.; Veloso Espinosa, Eugenio Andrés
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    Plasma levels of potassium and magnessium after modified ultrafiltration in pediatric cardiac surgery with cardiopulmonary bypass
    (SAGE PUBLICATIONS LTD, 2012) Lopez, R.; Lema, G.; Gonzalez, A.; Carvajal, C.; Canessa, R.; Carrasco, P.; Lazo, V.; Hudson, C.; Gonzalez, R.; Frangini, P.
    Objective: Modified ultrafiltration (MUF) reduces some of the complications associated with cardiopulmonary bypass (CPB) in pediatric cardiac surgery. However, we have observed hypokalemia and hypomagnesemia in children when MUF is used. Such alterations may elicit severe arrhythmias in the postoperative period. To date, no studies have focused on the effects MUF may have in plasma levels of potassium (K) and magnesium (Mg). The objective of our study was to determine if there is any variation in plasma levels of K (plK) and Mg (plMg) after MUF in children undergoing cardiac surgery with CPB.
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    Redshift evolution of the dark matter haloes shapes
    (2023) Cataldi, P.; Pedrosa, S. E.; Tissera, P. B.; Artale, M. C.; Padilla, N. D.; Dominguez-Tenreiro, R.; Bignone, L.; Gonzalez, R.; Pellizza, L. J.
    In this work, we aim at investigating the morphology evolution of Milky Way mass-like dark matter haloes selected from the cielo and IllustrisTNG projects. The connection between halo shapes and their environment has been studied in previous works at z = 0 but their connection remains yet to be fully understood. We focus on the evolution across cosmic time of the halo shapes and the relation with the infalling material, using hydrodynamical simulations. Our findings show that haloes tend to be more triaxial at earlier times as a consequence of stronger accretion in the direction of the filaments. As the haloes evolve towards a dominant isotropic accretion mode and relaxation, their shape at 20 per cent of the virial radius becomes more spherical. In agreement with previous results, baryons have an important effect within the inner regions of the haloes, driving them from triaxial to rounder shapes. We also find a correlation between the strength of the quadrupole infalling mode and the degree of ellipticity of the haloes: as the filament strength decreases steadily with redshift, the haloes became more spherical and less elliptical.
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    Resultados comparativos de cirugía de Fontan en pacientes con y sin hipoplasia de corazón izquierdo
    (2016) Becker Rencoret, Pedro Antonio; Besa Bandeira, Santiago; Riveros González, Sergio; Frangini Sanhueza, Patricia Andrea; Springmüller P., Daniel; Gonzalez, R.; Urcelay Montecinos, Gonzalo
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    Satellite galaxies in groups in the CIELO Project I. Gas removal from galaxies and its re-distribution in the intragroup medium
    (2022) Rodriguez, S.; Garcia Lambas, D.; Padilla, N. D.; Tissera, P.; Bignone, L.; Dominguez-Tenreiro, R.; Gonzalez, R.; Pedrosa, S.
    We study the impact of the environment on galaxies as they fall in and orbit in the potential well of a Local Group (LG) analogue, following them with high cadence. The analysis is performed on eight disc satellite galaxies from the CIELO suite of hydrodynamical simulations. All galaxies have stellar masses within the range [10(8.1)-10(9.56)] M(circle dot)h(-1). We measure tidal torques, ram pressure, and specific star formation rates (sSFRs) as a function of time, and correlate them with the amount of gas lost by satellites along their orbits. Stronger removal episodes occur when the disc plane is oriented perpendicular to the direction of motion. More than one peripassage is required to significantly modify the orientations of the discs with respect to the orbital plane. The gas removed during the interaction with the central galaxies may also be found opposite to the direction of motion, depending on the orbital configuration. Satellites are not totally quenched when the galaxies reach their first peripassage and continue forming about 10 per cent of the final stellar mass after this event. The fraction of removed gas is found to be the product of the joint action of tidal torque and ram pressure, which can also trigger new star formation activity and subsequent supernova feedback.
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    Síndrome de hipoplasia de corazón izquierdo : experiencia de 10 años de un programa de etapificación quirúrgica
    (2016) Urcelay Montecinos, Gonzalo; Arancibia Galilea, María Francisca; Retamal, Javiera; Springmüller P., Daniel; Clavería Rodríguez, Cristian; Garay Walls, Francisca; Frangini Sanhueza, Patricia Andrea; Gonzalez, R.; Heusser Risopatron, Felipe; Zelada, Pamela; Becker Rencoret, Pedro Antonio
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    Stellar populations in bulges of Milky Way type galaxies
    (2013) Gargiulo, Ignacio Daniel; Cora, Sofia Alejandra; Padilla, Nelson David; Gonzalez, Osmar Alcides; Zoccali, Manuela; Ruiz, Andrés Nicolás; Gonzalez, R.
    We make use of a semi-analytic model of galaxy formation to study the chemical properties of the stellar populations (SPs) of bulges of Milky Way (MW) type galaxies. Our goal is to contribute to the understanding of the formation mechanisms of bulges in general and of the MW bulge in particular. We compare spectroscopic and photometric stellar metallicity distributions with our model results. We obtain good agreement when comparing with spectroscopic metallicities; while the comparison with photometric values points to a deficit in metals in the model bulges. We attribute this difference to the fact that ages of stellar SPs in the model are underestimated....
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    Visual Recognition to Access and Analyze People Density and Flow Patterns in Indoor Environments
    (IEEE, 2015) Ruz Ruz, Cristian Daniel; Pieringer Baeza, Christian Philip; Peralta Marquez, Billy Mark; Lillo Valles, Iván Alberto; Espinace Ronda, Pablo Andrés; Gonzalez, R.; Wendt González, Bruno Nicolás; Mery Quiroz, Domingo Arturo; Soto Arriaza, Álvaro
    This work describes our experience developing a system to access density and flow of people in large indoor spaces using a network of RGB cameras. The proposed system is based on a set of overlapped and calibrated cameras. This facilitates the use of geometric constraints that help to reduce visual ambiguities. These constraints are combined with classifiers based on visual appearance to produce an efficient and robust method to detect and track humans. In this work, we argue that flow and density of people are low level measurements that need to be complemented with suitable analytic tools to bridge semantic gaps and become useful information for a target application. Consequently, we also propose a set of analytic tools that help a human user to effectively take advantage of the measurements provided by the system. Finally, we report results that demonstrate the relevance of the proposed ideas.