Results 61 to 70 of about 1,621,829 (188)

Better null models for assessing predictive accuracy of disease models.

open access: yesPLoS ONE, 2023
Null models provide a critical baseline for the evaluation of predictive disease models. Many studies consider only the grand mean null model (i.e. R2) when evaluating the predictive ability of a model, which is insufficient to convey the predictive ...
Alexander C Keyel, A Marm Kilpatrick
doaj   +1 more source

Envelope tests for spatial point patterns with and without simulation

open access: yesEcosphere, 2016
Model testing is a central step of spatial point pattern analysis, which allows ecologists to judge if their data agree with ecological hypotheses. We present a simple and elegant solution of a challenging problem: the construction of a goodness‐of‐fit ...
Thorsten Wiegand   +2 more
doaj   +1 more source

A Fractal Landscape Realizer for Generating Synthetic Maps

open access: yesEcology and Society, 2002
A fractal landscape realizer has been developed that generates synthetic landscape maps to user specifications. The alternative landscape realizations are not identical to the actual maps after which they are patterned, but are similar statistically (i.e.
William Hargrove   +2 more
doaj   +1 more source

Tiny Graviton Matrix Theory On Time-Dependent Background

open access: yes, 2008
In this article we construct a tiny graviton matrix model for type IIB string theory on a plane-wave background with null dilaton. For the linear null dilaton case, we analyze its vacuum and the excitation spectrum around the vacuum, and discuss the time-
Chen, Bin, Liu, Xiao
core   +1 more source

PCPS – an R-package for exploring phylogenetic eigenvectors across metacommunities

open access: yesFrontiers of Biogeography, 2014
PCPS is an R package for exploring phylogenetic eigenvectors across metacommunities. It offers a set of functions for analyzing principal coordinates of phylogenetic structure (PCPS), allowing analysis of phylogenetic signal in ecological traits of ...
Vanderlei Julio Debastiani   +1 more
doaj  

Evidence of limiting similarity revealed using a conservative assessment of coexistence

open access: yesEcosphere, 2019
The concept of limiting similarity is important in ecology because it encapsulates the expectation under niche theory that differences among species are fundamental to coexistence. A growing body of research has tested for evidence of limiting similarity,
Brandon S. Schamp, Ashley M. Jensen
doaj   +1 more source

Energy emission from high curvature region and its backreation

open access: yes, 2018
A strong gravity naked singular region can give important clues towards understanding classical as well as spontaneous nature of General Relativity. We propose here a model for energy emission from a naked singular region in a self-similar dust spacetime
Harada, Tomohiro   +2 more
core   +1 more source

The Setting of the Null Subject Parameters across (Non-)Null-Subject Languages

open access: yesLanguages
This article explores a learning model for acquiring a variety of null and non-null-subject languages (i.e., consistent, partial, semi and non-null-subject languages).
Karina Bertolino
doaj   +1 more source

Measuring Up to Reality: Null Models and Analysis Simulations to Study Parental Coordination Over Provisioning Offspring

open access: yesFrontiers in Ecology and Evolution, 2019
Behavioral coordination when provisioning offspring, through alternation and synchrony, has been hypothesized to influence rearing success. However, studying coordination at the pair level presents two analytical difficulties.
Malika Ihle   +7 more
doaj   +1 more source

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