Repositorio IPICyT: Envíos recientes
Mostrando ítems 1161-1180 de 2345
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Photosynthetically active radiation and carbon gain drives the southern orientation of Myrtillocactus geometrizans fruits
(John Wiley & Sons, 2017-03)"The equatorial orientation of reproductive structures is known in some columnar cacti from extratropical deserts. It has been hypothesised that photosynthetically active radiation (PAR) interception is the main reason for ... -
Germination characteristics of Gymnocalycium monvillei (Cactaceae) along its entire altitudinal range
(2017-04)"Germination characteristics are important for understanding how species cope with environmental variation. The aims of this work were to analyze the effect of different temperatures (25 and 32 °C), water potentials (0, ... -
Global stabilisation of the PVTOL aircraft with lateral force coupling and bounded inputs
(Taylor & Francis LTD, 2010-06)"This work is devoted to prove that the nonlinear control scheme previously proposed by Zavala-Río, Fantoni and Lozano for the global stabilisation of the planar vertical take-off and landing (PVTOL) aircraft with bounded ... -
Finite-time observer-based output-feedback control for the global stabilisation of the PVTOL aircraft with bounded inputs
(Taylor & Francis LTD, 2016-05)"In this work, an output-feedback scheme for the global stabilisation of the planar vertical take-off and landing aircraft with bounded inputs is developed taking into account the positive nature of the thrust. The global ... -
Global finite-time stability characterized through a local notion of homogeneity
(IEEE, 2014-02)"In this work, a notion of local homogeneity is formally defined. Important results involving homogeneous functions or vector fields are reformulated in the consequent local context. In particular, global finite-time ... -
Bounded positive adaptive control for counterflow heat exchangers
(International Federation of Automatic ControlInternational Federation of Automatic Control, 2007)"In this work, we propose an outlet temperature control scheme for counterflow heat exchangers, that takes into account and actually exploits the analytical-stability features inherent to the open-loop dynamics. As a result, ... -
Closed-loop stabilization of a class of Lur'e system: application to chaos control
(International Federation of Automatic Control, 2005)"In this paper the problem of closed-loop stabilization of a class of Lur'e system is addressed. Under certain conditions of the static non-linearity, the control problem is proved that can be converted to a simultaneous ... -
Chitosan selectivity for removing cadmium (II), copper (II), and lead (II) from aqueous phase: pH and organic matter effect
(Elsevier B.V., 2009-02)"The aim of this study was to investigate the selectivity of chitosan for cadmium, copper and lead in the presence and absence of natural organic matter (NOM) in different pH solutions. Adsorption isotherms of one and three ... -
Arabidopsis thaliana sucrose phosphate synthase (sps) genes are expressed differentially in organs and tissues, and their transcription is regulated by osmotic stress
(Elsevier B.V., 2017-11)"Sucrose is synthesized from UDP-Glc and Fru-6-phosphate via the activity of sucrose-phosphate synthase (SPS) enzymes, which produce Suc-6-phosphate. Suc-6-phosphate is rapidly dephosphorylated by phosphatases to produce ... -
Robust global stabilizing bounded control of a PVTOL aircraft with lateral coupling
(International Federation of Automatic Control, 2005)"This note provides a detailed stability analysis of a global stabilizing control algorithm for a PVTOL aircraft with lateral coupling (è ≠ 0) and bounded inputs. Such control approach was originally proposed considering ... -
Speed-gradient adaptive high-gain observers for synchronization of chaotic systems
(International Federation of Automatic ControlInternational Federation of Automatic Control, 2007)"We address the problem of output feedback synchronization of certain chaotic systems, under parameter uncertainty. That is, given a master system, the objective is to design a slave system that copies the dynamics of the ... -
Propiedades estructurales y magnéticas de aleaciones subnanométricas de FePt
(2018-08)"Las nanoaleaciones binarias, compuestas por metales de transición, han sido objeto de numerosos estudios, ya que se espera que las propiedades de los elementos individuales se acoplen y potencialicen al ser mezclados. Del ... -
Opuntia spp.: characterization and benefits in chronic diseases
(Hindawi Publishing Corporation, 2017)"Opuntia species have been used for centuries as food resources and in traditional folk medicine for their nutritional properties and their benefit in chronic diseases, particularly diabetes, obesity, cardiovascular diseases, ... -
H2Ti3O7 nanotubes decorated with silver nanoparticles for photocatalytic degradation of atenolol
(Hindawi Publishing Corporation, 2017)"The photocatalytic degradation/adsorption process of the β-blocker atenolol (ATL) under UV irradiation is described using two types of silver decorated catalysts: silver/titania and silver/titanates. The silver ions were ... -
Highly efficient production of nitrogen-doped multiwalled carbon nanotubes using banded iron formation from the Bundelkhand craton located in the north of India
(2018)"Los polvos de formación de hierro bandeado (FHB) son rocas sedimentarias de la era precámbrica, formadas principalmente por bandas de óxidos de hierro y sílice. Hemos utilizado polvos de FHB del cráter de Bundelkhand, ... -
Cytotoxicity induced by carbon nanotubes in experimental malignant glioma
(Dove Press Ltd, 2017)"Despite multiple advances in the diagnosis of brain tumors, there is no effective treatment for glioblastoma. Multiwalled carbon nanotubes (MWCNTs), which were previously used as a diagnostic and drug delivery tool, have ... -
Stability and multiscroll attractors of control systems via the abscissa
(Hindawi, 2017)"We present an approach to generate multiscroll attractors via destabilization of piecewise linear systems based on Hurwitz matrix in this paper. First we present some results about the abscissa of stability of characteristic ... -
Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor
(2017-01)"The Granjeno Schist is a meta-volcanosedimentary upper Paleozoic complex in northeastern Mexico. We suggest different tectonic settings for metamorphism of its serpentinite and talc-bearing rocks based on petrographic and ... -
Síntesis de esponjas de carbono dopadas con nitrógeno mediante deposición química de vapor y su aplicación en remediación ambiental
(2018-08)"La eliminación de contaminantes farmacéuticos en los efluentes de agua se ha realizado utilizando diferentes materiales tales como membranas poliméricas, carbón activado, nanotubos de carbono, nanofibras, carbón poroso, ... -
Estudio teórico experimental de compósitos de Y2O3 -GO
(2018-08)"El Y2O3 es el compuesto mas abundante de este elemento, el cual ha sido estudia- do por sus propiedades cerámicas y electro-ópticas, sin embargo, recientemente se ́ ha comenzado a reportar el uso de este oxido metálico ...