Browsing by Title Artículos de revistas
Now showing items 671-690 of 4966
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(2012)Using the notion of summable dichotomy in ordinary difference equations and the contraction and Schauder fixed point theorem, we obtain the existence of bounded and periodic solutions on ℤ under quite general hypotheses ...
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(2009)By using the concept of integrable dichotomy, the fixed point theory, functional analysis methods and some new technique of analysis, we obtain new criteria for the existence and uniqueness of bounded and periodic solutions ...
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(American Physical Society, 2014)We examine the PT-symmetry-breaking transition for amagnetic metamaterial of a finite extent, modeled as an array of coupled split-ring resonators in the equivalent circuit model approximation. Small-size arrays are ...
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(Lippincott Williams & Wilkins, 2022)Purpose of review The vascular hypothesis of schizophrenia (SZ) postulates that brain endothelial dysfunction contributes to brain pathophysiology. This review discusses recent evidence for and against this hypothesis, ...
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(Academic Press Inc.apjcs@harcourt.com, 2020)
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(Elsevier, 1997)The present status of the Brazilian AMS program, based on the University of São Paulo 8UD tandem accelerator, is described. Results of tests and developments on voltage stability, focusing, automatic system for changing ...
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(ELSEVIER SCIENCE BV, 2010-07-15)The existenceandstabilityofdiscretebreathersisstudiedtheoreticallyforamodelmagnetic metamaterialcomposedofaperiodicbinaryarrayofsplit-ringresonatorswithresonancefrequency mismatch.Itisdemonstratedthatbreatherscanbeexci ...
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(Revista Biota Neotropica, Brazil, 2021)Breeding biology in a population of Rufous-collared Sparrow (Zonotrichia capensis, Statius Müller, 1776) at different elevations in the Tropical Andes. Elevation strongly influences the evolution of life history ...
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(ELSEVIER, 2008)The breeding system determines different ways whereby seeds will be produced, and the degree of dependency of plants on pollinators for seed set. The genus Chloraea (Orchiclaceae) has its main center of diversity in southern ...
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(Marcel Dekker Inc., 1996)The electronic absorption charge transfer bands in a series of para-substituted benzalketones are analyzed in order to stablish the role of the electron-donor substituent as well as the electronic properties of the molecular ...
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(1993)During the charge-transfer process in the excited state of aromatic carbonyl compounds, the local C-O net charge decreases as the polyene bridge length between the aromatic and the carbonyl systems is increased. Part of ...
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(2002)By means of 13C-NMR spectroscopy and ab initio molecular orbital theory calculations we have analyzed the bridge effect of the C=N bond and the long distance electronic effect of the electron-donor substituents (D: -NO2, ...
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(WILEY-LISS, DIV JOHN WILEY & SONS, 2006-12)An important body of evidence documents the differential expression of ion channels in brains, suggesting they are essential to endow particular brain structures with specific physiological properties. Because of their ...
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(Elsevier, 2020)A double cropping system for the grapevine (Vitis vinifera L) has been commercially adopted for use in regions where the tropical climate is characterized by high temperatures and small variations in daylength throughout ...
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(IOP Publisihing, 2015)We examine bulk and surface bound states in the continuum (BIC), that is, square-integrable, localized modes embedded in the linear spectral band of a discrete lattice including interactions to first and second nearest ...
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(ELSEVIER, 2008-11-17)We study localized modes on a single magnetic impurity positioned in the bulk or at the surface of a one-dimensional chain, in the presence of a magnetic field 8 acting at the impurity site. The strong on-site nonlinear ...
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(2009)We investigate theoretically the existence of bulk and surface discrete breathers in a one-dimensional magnetic metamaterial comprised of a periodic binary array of split-ring resonators; the two types of resonators used ...
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(2013)A succession of marine and continental strata on the southern flank of Cerro Cono in the Sierra Baguales, northeast of Torres del Paine, can be correlated with stratigraphic units exposed along the southern border of the ...