Browsing by Title Facultad de Ciencias Físicas y Matemáticas
Now showing items 19960-19979 of 20545
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(Nature, 2020)Statistical analysis of velocity fluctuations in the interstellar medium (ISM) of the Milky Way and NGC 4321 show that the motion of molecular gas over scales ranging from 0.1 to 1,000 pc is similar, and consistent with ...
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(The Astronomical journal, 97: 720-725, 1989, 1989-03)UVBRI photoelectric sequences for fifteen AGNs were obtained with 0.6, 0.9, and 1-m telescopes. The data include 473 observations for 118 stars, giving an average of 4.0 observations per star, and 7.9 stars per sequence. ...
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(OP PUBLISHING, 2016)We present a compilation of UBVRIz light curves of 51 type II supernovae discovered during the course of four different surveys during 1986-2003: the Cerro Tololo Supernova Survey, the Calan/Tololo Supernova Program (C&T), ...
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(2014-01-08)The U-Chile-1 four legged team is an effort of the Department of Electrical Engineering of the University of Chile in order to foster research in robotics at high level. U-Chile-1 was composed this year by a group ...
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(Royal Astronomical Society, 2012-04-03)detected using a fully automated search in the Cosmic Evolution Survey field. The detection algorithm is based on density peak extraction from a density distribution sampled usingVoronoi tessellation within overlapping ...
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(Universidad de Chile, 2018)Polarization is a key measurement within radio astronomy because its state can give insight as to the physical conditions of the source and the medium the radiation has traveled through. In radio astronomy receivers, the ...
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(EDP Sciences, 2015)Context. Deep spectral-line surveys in the mm and sub-mm range can detect thousands of lines per band uncovering the rich chemistry of molecular clouds, star forming regions and circumstellar envelopes, among others ...
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(IOP Publishing, 2020)It is shown that the interplay between curvature and interfacial Dzyalonshinsky-Moriya interaction (DMI) is a pathway to ultrafast domain wall (DW) dynamics in ferromagnetic nanotubes. In this work, we theoretically study ...
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(2009)In this article we study which infinite matrices are potential matrices. We tackle this problem in the ultrametric framework by studying infinite tree matrices and ultrametric matrices. For each tree matrix, we show the ...
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(Springer, 2020)The influence of synthesis parameters using the ultrasonic-assisted sol-gel method on the properties of TiO2 nanostructures was studied. Different synthesis conditions such as long stirring time, type of acid used as the ...
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(Blackwell Publishing Ltd, 2019)Background: It has been reported that clinical evaluation consistently underestimates the severity of hidradenitis suppurativa (HS). Objective: To determine the usefulness of ultrasound as a diagnostic tool in HS compared ...
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(Academic Press Inc., 2019)The chalcone and bis-chalcone derivatives have been synthesized under sonication conditions via Claisen-Schmidt condensation with KOH in ethanol at room temperature (20–89%). The structures were established on the basis ...
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(The American Astronomical Society, 1997-08-10)We present UV observations of the symbiotic stars Hen 1213, Hen 1341, and Hen 1761, made almost simultaneously with optical observations during 1995; previous optical observations were made during 1987 and 1991. The UV ...
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(Oxford Univ. Press, 2016)We investigate the strength of ultraviolet Fe ii emission in fainter quasars compared with brighter quasars for 1.0 a parts per thousand currency sign z a parts per thousand currency sign 1.8, using the Sloan Digital Sky ...
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(WILEY-BLACKWELL PUBLISHING, 2009)We present spectra of six luminous quasars at z ∼ 2, covering rest wavelengths 1600−3200 Å. The fluxes of the UV Fe II emission lines and MgII λ2798 doublet, the line widths of Mg II and the 3000 Å luminosity were obtained ...
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(Amer Physical Soc, 2020)Electrically driven nematic liquid crystals layers are ideal contexts for studying the interactions of local topological defects, umbilical defects. In homogeneous samples the number of defects is expected to decrease ...
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(Universidad de Chile, 2014)n la presente memoria se estudian las distribuciones cuasi-estacionarias (q.s.d.) de un proceso \hat{Y} de nacimiento y muerte a tiempo continuo. Este proceso es absorbido al alcanzar una cantidad determinada de individuos, ...
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(Universidad de Chile, 2013)Los problemas de ruteo de vehículos, tienen la particularidad de ser simples de expresar, pero complejos de resolver; lo anterior es por las restricciones de integralidad y el crecimiento exponencial de sus posibilidades, ...
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(Universidad de Chile, 2015)Modelo de satisfacción de usuarios de la Municipalidad de Lo Prado: Análisis de los servicios entregados en Edificio Consistorial y Departamento de Desarrollo Social La mayoría de los municipios en Chile, pese a que su ...
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(Universidad de Chile, 2014)En este trabajo se desarrolla una metodología basada en un modelo de programación lineal entera mixta para la el diseño de cuadrantes, en el contexto del Plan Cuadrante de Seguridad Preventiva (PCSP) de Carabineros de ...
