Browsing by Title Facultad de Ciencias
Now showing items 5231-5250 of 8192
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(2003)We present an approach to the construction of action principles (the inverse problem of the calculus of variations), for first order (in time derivatives) differential equations, and generalize it to field theory in order ...
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(Elsevier Masson SAS, 1998)In this paper we consider the study of standing wave solutions for a nonlinear Schrödinger equation. This problem reduces to that of finding nonnegative solutions of ε2Δu - V (x) u + (Latin small letter esh) (u) = 0 in Ω. ...
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(OXFORD UNIV PRESS, 2006-07)Background and Aims Post-dispersal seed predation in alpine communities has received little attention despite evidence that seeds removed by granivores can decrease plant recruitment into ecosystems. Moreover, few studies ...
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(Ecological Soc. Amer., 2015)One of the fastest growing uses of stable isotope analysis in ecology is using hydrogen isotope (delta H-2) values to characterize animal movement and migration strategies. Most studies measure delta H-2 values in metabolically ...
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(Ecological Society of America, 2015)© 2015 Newsome et al. One of the fastest growing uses of stable isotope analysis in ecology is using hydrogen isotope (δ2H) values to characterize animal movement and migration strategies. Most studies measure δ2H values ...
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(Amer Physical Soc, 2016)The particle-particle interaction potential of an N-atom cluster is expanded in n-body contributions. The expansion allows us to determine the magnitude of each one of the n-body terms, and consequently quantifies how ...
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(Elsevier Science SA, 2018)This review focuses on the recent developments of unsymmetrically-substituted multidentate Schiff bases whose steric and electronic characteristics are easily manipulated by selecting suitable condensing aldehydes or ketones ...
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(Elsevier, 2017)The 2001 Mw7.7 Bhuj mainshock seismic sequence in the Kachchh area, occurring during 2001 to 2012, has been analyzed using mono-fractal and multi-fractal dimension spectrum analysis technique. This region was characterized ...
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(MDPI, 2021)This paper explores the spatial variations of the statistical scaling features of low to high latitude geomagnetic field fluctuations at Swarm altitude. The data for this study comes from the vector field magnetometer ...
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(BioMed Central, 2015)Background: Pseudomonas aeruginosa is known to be a multidrug resistant opportunistic pathogen. Particularly, P. aeruginosa PAO1 polyphosphate kinase mutant (ppk1) is deficient in motility, quorum sensing, biofilm formation ...
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(Nature Publishing Group, 2017)Fragile-X syndrome (FXS) patients display intellectual disability and autism spectrum disorder due to silencing of the X-linked, fragile-X mental retardation-1 (FMR1) gene. Dysregulation of cAMP metabolism is a consistent ...
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(ELSEVIER, 2006-01)Urbanization is increasingly homogenizing the biota of less developed countries. Even though urban sprawl is a worldwide problem, most studies on the effects of urbanization, and the conceptual models have focused on ...
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(Wiley, 2020)Aim Antarctica's remote and extreme terrestrial environments are inhabited by only two species of native vascular plants. We assessed genetic connectivity amongst Antarctic and South American populations of one of these ...
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(Nature, 2015)Within the volcanological community there is a growing awareness that many large-to smallscale, point-source eruptive events can be fed by multiple melt bodies rather than from a single magma reservoir. In this study, glass ...
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(National Academy of Sciences, 2018)Bacterial endosymbionts that provide nutrients to hosts often have genomes that are extremely stable in structure and gene content. In contrast, the genome of the endosymbiont Hodgkinia cicadicola has fractured into multiple ...
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(American Institute of Mathematical Sciences, 2019)Small non-autonomous perturbations around an equilibrium of a nonlinear delayed system are studied. Under appropriate assumptions, it is shown that the number of T-periodic solutions lying inside a bounded domain Ω ⊂ R N ...
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(Elsevier B.V., 2017)© 2017 Elsevier B.V. A large variety of antipredator defenses are exhibited by plants, animals and microbes in nature. A deep understanding of the dynamic consequences of prey responses to predation risk is essential for ...
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(AMER METEOROLOGICAL SOC, 2006-08)Results are reported from two 5-month-long simulations for southern South America using the fifth-generation Pennsylvania State University - NCAR Mesoscale Model (MM5). The periods of simulation correspond to May - September ...
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(2009-09-14)We study the dynamics of a pair of nonlinear split-ring resonators (a ‘metadimer’) excited by an alternating magnetic field and coupled magnetically. Linear metadimers of this kind have been recently used as the elementary ...
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(Centro de Perfeccionamiento, Experimentación e Investigaciones Pedagógicas, 1976-08)