Results 11 to 20 of about 26,032,742 (276)
A null model for microbial diversification. [PDF]
Proc Natl Acad Sci U S A, 2017 SignificanceWhen evolutionary histories of closely related microorganisms are reconstructed, the lineages often cluster into visibly recognizable groups. However, we do not know if these clusters represent fundamental units of bacterial diversity, such as “species,” nor do we know the nature of evolutionary and ecological forces that are responsible ...
Straub TJ, Zhaxybayeva O.
europepmc +5 more sources
Null Model and Community Structure in Multiplex Networks. [PDF]
Sci Rep, 2018 The multiple relationships among objects in complex systems can be described well by multiplex networks, which contain rich information of the connections between objects. The null model of networks, which can be used to quantify the specific nature of a
Zhai X +7 more
europepmc +5 more sources
A new dynamic null model for phylogenetic community structure. [PDF]
Ecol Lett, 2015 Phylogenies are increasingly applied to identify the mechanisms structuring ecological communities but progress has been hindered by a reliance on statistical null models that ignore the historical process of community assembly.
Pigot AL, Etienne RS.
europepmc +3 more sources
Null-model-based network comparison reveals core associations. [PDF]
ISME Commun, 2021 Microbial network construction and analysis is an important tool in microbial ecology. Such networks are often constructed from statistically inferred associations and may not represent ecological interactions.
Röttjers L +3 more
europepmc +2 more sources
The consequences of null model selection for predicting mortality from multiple stressors. [PDF]
Proc Biol Sci, 2021 Many ecological systems are now exposed to multiple stressors, and ecosystem management increasingly requires consideration of the joint effects of multiple stressors on focal populations, communities and ecosystems.
Dey CJ, Koops MA.
europepmc +2 more sources
Toward an Evolutionarily Appropriate Null Model: Jointly Inferring Demography and Purifying Selection. [PDF]
Genetics, 2020 The relative evolutionary roles of adaptive and non-adaptive processes remain a central question in population genetics. Resolution of this debate has been difficult as an appropriate null model incorporating...
Johri P, Charlesworth B, Jensen JD.
europepmc +2 more sources
Constructing networks by filtering correlation matrices: a null model approach. [PDF]
Proc Math Phys Eng Sci, 2019 Network analysis has been applied to various correlation matrix data. Thresholding on the value of the pairwise correlation is probably the most straightforward and common method to create a network from a correlation matrix.
Kojaku S, Masuda N.
europepmc +3 more sources
A null model of the mouse whole-neocortex micro-connectome. [PDF]
Nat Commun, 2019 In connectomics, the study of the network structure of connected neurons, great advances are being made on two different scales: that of macro- and meso-scale connectomics, studying the connectivity between populations of neurons, and that of micro-scale
Reimann MW +5 more
europepmc +2 more sources
A Matrix Model for the Null-Brane [PDF]
Journal of High Energy Physics, 2005 The null-brane background is a simple smooth 1/2 BPS solution of string theory. By tuning a parameter, this background develops a big crunch/big bang type singularity.
A. Bergman +47 more
core +3 more sources
Reduced Corneal Innervation in the CD25 Null Model of Sjögren Syndrome. [PDF]
Int J Mol Sci, 2018 Decreased corneal innervation is frequent in patients with Sjögren Syndrome (SS). To investigate the density and morphology of the intraepithelial corneal nerves (ICNs), corneal sensitivity, epithelial cell proliferation, and changes in mRNA expression ...
Stepp MA +5 more
europepmc +2 more sources