Browsing by Title Artículos de revistas
Now showing items 1985-2004 of 7546
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(The American Astronomical Society, 1988-10-15)New 6 cm continuum and radio recombination line VLA observations as well as CO observations are presented of the bright PN NGC 6302. The H110-alpha line is significantly broader than the H76-alpha line, an effect which is ...
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(2001-09-10)We present optical and infrared spectroscopy of the first 2 months of evolution of the Type II supernova SN 1999em. We combine these data with high-quality optical/infrared photometry beginning only 3 days after shock ...
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(UNIV CHICAGO PRESS, 2008-08-10)We present distance estimates for 11 peculiar Virgo Cluster spiral galaxies based on measurements of the stellar kinematics of their central 2 kpc. Stellar circular velocities were obtained using two- integral dynamical ...
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(UNIV CHICAGO PRESS, 1994-09-01)We have used observations gathered at CTIO to measure distances by the expanding photosphere method (EPM) to five Type II supernovae. These supernovae lie at redshifts from cz = 1100 km s-1 to cz - 5500 km s-1, and increase ...
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(SPRINGER, 2006-06)In order to produce a certain vector of flows over a fixed-size network, a transport firm has to choose, among many other things, a route structure. In accommodating increasing traffic, transport firms will adjust their ...
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(CENIM, 2008-05)En este trabajo, se caracteriza la distribución de tamaño de burbujas en una celda de flotación, tanto a escala industrial como a escala de laboratorio. En los casos experimentales, los tamaños de burbuja se miden vía ...
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(Institute of Electrical and Electronics Engineers Inc., 2020)
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(IEEE-Inst Electrical Electronics Engineers, 2020)There is an increasing interest and research effort focused on the analysis, design and implementation of distributed control systems for AC, DC and hybrid AC / DC microgrids. It is claimed that distributed controllers ...
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(IEEE, 2020)A distributed control system is proposed which uses the Conservative Power Theory (CPT) and a consensus algorithm to share imbalance and harmonics between different converters in three-phase four-wire droop-controlled ...
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(Institute of Electrical and Electronics Engineers Inc., 2020)
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(IEEE, 2020)Distributed control schemes have transformed frequency and voltage regulation into a local task in distributed generators (DGs) rather than by a central secondary controller. A distributed scheme is based on information ...
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(Elsevier, 2014)
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(IOP Publishing Ltd, 2018)We report ALMA observations with resolution approximate to 0 ''.5 at 3 mm of the extended Sgr B2 cloud in the Central Molecular Zone (CMZ). We detect 271 compact sources, most of which are smaller than 5000 au. By ruling ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2005-12)A suite of 36 surface sediment samples, taken between 10 and 100 in water depth in Mejillones Bay (Northern Chile), were analyzed for mineralogy, grain size, total organic carbon, Al, and heavy metal content (Cd, Zn, Ni, ...
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(American Institute of Physics, 2020)Distributed generation (DG) has experienced extraordinary growth in installed capacity in many countries. DG can have a significant impact on both the investment and operational costs of distribution feeders. However, in ...
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(IEEE-Inst Electrical Electronics Engineers, 2020)
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(Elsevier Ltd, 2019)As one of the main environmental effects of earthquakes, the distribution of landslides could reflect regional neotectonic activity. To that end, we carried out an inventory of landslides along the Precordillera range ...
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(EDP Sciences, 2018-07-03)Context. Clusters are common sites of star formation, whose members display varying degrees of mass segregation. The cause may be primordial or dynamical, or a combination both. If mass segregation were to be observed in ...
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(1999)We present VLA observations of the J; K 1; 1 , (2, 2), (3, 3) and (4, 4) inversion transitions of NH3 toward the HW 2 object in Cepheus A, with 1-arcsec angular resolution. Emission is detected in the main hyperfine ...