Results 51 to 60 of about 22,833 (190)
Dispersive limits in the homogenization of the wave equation [PDF]
Annales de la Faculté des sciences de Toulouse : Mathématiques, 2003 The author studies a scalar wave equation (the Klein-Gordon equation) with a large potential in a periodic medium. The period is supposed of order \(\varepsilon\) and the potential is of order \(\varepsilon^{-2}\). The homogenized limit depends on the sign of the first cell eingenvalue \(\lambda_1\).
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Estimating and Mapping Ecological Processes Influencing Microbial Community Assembly
Frontiers in Microbiology, 2015 Ecological community assembly is governed by a combination of (i) selection resulting from among-taxa differences in performance; (ii) dispersal resulting from organismal movement; and (iii) ecological drift resulting from stochastic changes in ...
James C Stegen +3 more
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Seed dispersal and spatial pattern in tropical trees. [PDF]
PLoS Biology, 2006 Theories of tropical tree diversity emphasize dispersal limitation as a potential mechanism for separating species in space and reducing competitive exclusion.
Tristram G Seidler, Joshua B Plotkin
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Extracellular Proteins Limit the Dispersal of Biogenic Nanoparticles [PDF]
Science, 2007 High–spatial-resolution secondary ion microprobe spectrometry, synchrotron radiation–based Fourier-transform infrared spectroscopy, and polyacrylamide gel analysis demonstrated the intimate association of proteins with spheroidal aggregates of biogenic zinc sulfide nanocrystals, an example of extracellular biomineralization.
Moreau, John W. +5 more
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Strong spatial influence on colonization rates in a pioneer zooplankton metacommunity. [PDF]
PLoS ONE, 2012 The magnitude of community-wide dispersal is central to metacommunity models, yet dispersal is notoriously difficult to quantify in passive and cryptic dispersers such as many freshwater invertebrates.
Dagmar Frisch +3 more
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Fundamental limitations of dispersion mitigation filters
Optics Express, 2020 We investigate the fundamental limitations of dispersion mitigation filters. By analyzing the dispersion compensating process from basic principles, we demonstrate how a digital filter can mitigate arbitrarily weak dispersion without oversampling. We calculate the maximum distance the signal can pass with and without dispersion compensation, beyond ...
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Dispersal and seed limitation affect diversity and productivity of montane grasslands
, 2008 So far, seed limitation as a local process, and dispersal limitation as a regional process have been largely neglected in biodiversity-ecosystem functioning research. However, these processes can influence both local plant species diversity and ecosystem
Auge, Harald +4 more
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Population dynamics of a long-lived alpine plant with sexual and clonal reproduction [PDF]
, 2006 This thesis focuses on the demography, reproduction, and pre-dispersal seed predation of the alpine clonal plant Geum reptans. In chapter 2, I studied the population dynamics of G.
Weppler, Tina
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Plants, 2023 Subtropical suburban secondary evergreen broadleaved forests are essential in regulating the ecological environment’s quality and promoting urban sustainable development.
Liangjin Yao +3 more
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Acoustic Propagation in Dispersions in the Long Wavelength Limit [PDF]
SIAM Journal on Applied Mathematics, 2005 The problem of scattering of ultrasound by particles in the long wavelength limit has a well-established solution in terms of Rayleigh expansions of the scattered fields. However, this solution is ill-conditioned numerically, and recent work has attempted to identify an alternative method.
Valerie J. Pinfield +3 more
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