Results 301 to 310 of about 107,594 (348)

Evenness mediates the global relationship between forest productivity and richness [PDF]

Journal of Ecology, 2023
1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity.
Mo Lidong, Angelica M Almeyda Zambrano, Patricia Álvarez-Loayza   +2 more
exaly   +25 more sources

The Concept of Evenness/Unevenness: Less Evenness or More Unevenness? [PDF]

Acta Biotheoretica, 2021
While evenness is understood to be maximal if all types (species, genotypes, alleles, etc.) are represented equally (via abundance, biomass, area, etc.), its opposite, maximal unevenness, either remains conceptually in the dark or is conceived as the ...
Hans-Rolf Gregorius, Gregorius Hans-Rolf   +1 more
exaly   +1 more source

The Relation between Evenness and Diversity

Diversity, 2010
Contrary to common belief, decomposition of diversity into independent richness and evenness components is mathematically impossible. However, richness can be decomposed into independent diversity and evenness or inequality components.
Lou Jost
exaly   +2 more sources

Organic agriculture promotes evenness and natural pest control

Nature, 2010
Human activity can degrade ecosystem function by reducing species number (richness) and by skewing the relative abundance of species (evenness). Conservation efforts often focus on restoring or maintaining species number reflecting the well-known impacts
David W Crowder, Tobin D Northfield, Michael R Strand   +2 more
exaly   +2 more sources

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Finding Even Cycles Even Faster

SIAM Journal on Discrete Mathematics, 1997
Summary: We describe efficient algorithms for finding even cycles in undirected graphs. Our main results are the following: (i) For every \(k \geq 2\), there is an \(O(V^2)\) time algorithm that decides whether an undirected graph \(G=(V,E)\) contains a simple cycle of length \(2k\), and finds one if it does.
Raphael Yuster, Uri Zwick
openaire   +2 more sources

‘Even if . . . ’

Linguistics and Philosophy, 1982
AbstractDiscussion of the semantics of ‘Even if . . .’ conditionals against the background of a more general account of the meaning of ‘even’. Merits and demerits of Lycan's account of this.
openaire   +1 more source

Surface Oscillations in Even-Even Nuclei

Physical Review, 1956
Surface oscillations in nuclei with deformation potentials independent of the shape parameter $\ensuremath{\gamma}$ are discussed, and are found to describe qualitatively the regularities in even-even nuclei of the type discussed by Scharff-Goldhaber and Weneser.
Wilets, Lawrence, Wilets, Maurie Jean
openaire   +1 more source

THE ALPHA DECAY OF EVEN–EVEN NUCLEI

Canadian Journal of Physics, 1963
The distribution of alpha particles on the surface of even–even alpha-emitting nuclei has been calculated by an approximate method initiated by V. G. Nosov and resembling Fröman's. Good agreement was obtained with the result of inward integration.
Steenberg, N. R., Sharma, R. C.
openaire   +1 more source

Excited States of Even-Even Nuclei

Physical Review, 1952
A general survey of excited states of even-even nuclei yields the following results: The $n\mathrm{th}$ excited state has usually a spin $I\ensuremath{\le}2n$. For $n=1$, the assignment $I=2+(\mathrm{even}\mathrm{parity})$ is compatible with experimental results for 66 out of 68 nuclei investigated. For $n=2$, of 26 nuclei investigated, about one-third
openaire   +1 more source

Even and even if

2005
At the beginning of Chapter 4, I observed that, given the right context, an even-if utterance, such as (1) or (2), can receive an interpretation similar to that of the but utterance in (3) or the although utterances in (4) and (5): (1) Even if it’s raining, Peter will go out. (2) Peter will go out, even if it’s raining. (3)
openaire   +1 more source