Browsing by Title Facultad de Ciencias Físicas y Matemáticas
Now showing items 20236-20255 of 20504
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-10-15)Let Omega be a bounded domain with smooth boundary in R-2. We construct non-constant solutions to the complex-valued Ginzburg-Landau equation epsilon(2)Delta u + (1 - vertical bar u vertical bar(2))u = 0 in Omega, as epsilon ...
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(IOP, 2020)Stars that escape globular clusters form tidal tails that are predominantly shaped by the global distribution of mass in the Galaxy, but also preserve a historical record of small-scale perturbations. Using deep grz ...
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(Elsevier Ltd, 2019)© 2018 COSPARWe report the existence of rapid variations in (effective) geomagnetic cutoff rigidity (Rc) between the equatorial and Antarctic zones adjacent to the Andes Mountains, revealed by the variation rate of geomagnetic ...
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(Universidad de Chile, 2014)El propósito del presente trabajo es formular una herramienta computacional de bajo costo que determine la potencia y la expansión de flujo de turbinas eólicas de eje vertical (VAWTs) tipo Darrieus. Esta herramienta puede ...
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(Springer, 2016)Recurrence properties of systems and associated sets of integers that suffice for recurrence are classical objects in topological dynamics. We describe relations between recurrence in different sorts of systems, study ways ...
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(SIAM Publicationss, 2020)In this work we introduce for extended real valued functions, defined on a Banach space X, the concept of K directionally Lipschitzian behavior, where K is a bounded subset of X. For different types of sets K (e.g., zero, ...
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(2010)In this work we introduce for extended real valued functions, defined on a Banach space X, the concept of K directionally Lipschitzian behavior, where K is a bounded subset of X. For different types of sets K (e.g., zero, ...
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(Springer New York LLC, 2019)This paper summarizes the development of Veamy, an object-oriented C++ library for the virtual element method (VEM) on general polygonal meshes, whose modular design is focused on its extensibility. The linear elastostatic ...
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(Institute of Electrical and Electronics Engineers Inc., 2019)© 1982-2012 IEEE. The modular multilevel matrix converter (M 3 C) is an ac-to-ac converter topology suitable for the control of high-power variable-speed drives. The control of this converter is complex, particularly when ...
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Vector Lyapunov-like functions for multi-order fractional systems with multiple time-varying delays (Elsevier, 2020)In this paper, a general method to establish the asymptotic behaviour of solutions to multi-order multiple time-varying delays nonlinear systems is proposed. The method, relying on vector Lyapunov-like functions and on ...
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(Elsevier, 2010)This paper proposes a method for reducing the number of search nodes involved in the solution of queries arriving to a Web search engine. The method is applied by the query receptionist machine during situations of sudden ...
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(2007)Boundary value problems for systems of ordinary differential equations are studied. These systems involve asymptotically homogeneous operators. Leray-Schauder indices are calculated for these operators and the concept of ...
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(Universidad de Chile, 2017)El alcoholismo es un grave problema socio-económico. El costo asociado al abuso del alcohol se ha estimado en 1.300 millones de dólares para la economía chilena y en 185 billones para Estados Unidos, costo que se debe ...
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(EDP Sciences, 2016)Context. The B-W method is used to determine the distance of Cepheids and consists in combining the angular size variations of the star, as derived from infrared surface-brightness relations or interferometry, with its ...
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(Universidad de Concepcion, 2019)The supply of fresh, high-quality and easily accessible vegetables is essential to improve the diet in Chile. The central zone is the main production area of the country. The objective of this research was to characterize ...
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(Universidad de la Frontera, 2019)The VEGF levels and its binding to its receptors are key stages in the regulation of angiogenesis. Acetylsalicylic acid (ASA), widely used in post-myocardial infarction treatment, has been shown to have an anti-angiogenic ...
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(Institute of Electrical and Electronics Engineers Inc., 2019)The lack of available spectrum for wireless communications is a threat to the successful deployment of applications designed for intelligent transportation systems (ITSs). The ITS services should be available to a high ...
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(IOP PUBLISHING LTD, 2004-10-01)We present observations of the Vela X region at 31 GHz using the Cosmic Background Imager ( CBI). We find a strong compact radio source (5.'9 x 4.'1, FWHM) about the Vela pulsar, which we associate with the Vela pulsar ...
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(1994-07-01)We present H92alpha radio recombination line and radio continuum observations toward three cometary-like H II regions, G13.87 + 0.28, G32.80 + 0.19B, and G61.48 + 0.09B1, with an angular resolution of approximately 2''. ...
