Results 181 to 190 of about 236,727 (226)

Signal‐to‐noise and spatial resolution in in‐line imaging. 3. Optimization using a simple model

Journal of Synchrotron Radiation, EarlyView.
Geometrical magnification and X‐ray energy are optimized with respect to spatial resolution, contrast, noise, radiation dose and other image quality characteristics. The optimization is performed using a simple theoretical model of a homogeneous edge feature embedded in a bulk uniform sample, and the resulting generic analytical expressions for image ...
Timur E. Gureyev, David M. Paganin, Harry M. Quiney   +2 more
wiley   +1 more source

Climate stability drives multidimensional nestedness of amphibian assemblages in a Chinese sky island system

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The nested subset pattern (nestedness) has been widely used to explain species distributions in island and fragmented systems. Mountain sky islands serve as critical natural laboratories for understanding the evolutionary consequences of geographic isolation and climate
Caiwen Zhang, Shihang Xu, Chuanwu Chen, Chenxiu Zhan, Baowei Zhang, Yanping Wang   +5 more
wiley   +1 more source

Bayesian and non-Bayesian estimation of the bivariate inverse Weibull distribution parameters using ranked set sampling with concomitant variable. [PDF]

Sci Rep
Muhammed HZ, Shaaban M.
europepmc   +1 more source

Dietary resilience of coral reef fishes to habitat degradation

Journal of Animal Ecology, EarlyView.
Metabarcoding of gut contents shows that two common benthic‐feeding reef fishes with different feeding stratgies—a butterflyfish (Chaetodon capistratus) and a hamlet (Hypoplectrus puella)—shift diets on degraded reefs. These shifts mirror contrasting patterns in body condition: butterflyfish showed strong individual variation, whereas condition was ...
Friederike Clever, Richard F. Preziosi, Bryan Nguyen, Brígida De Gracia, Helio Quintero Arrieta, W. Owen McMillan, Andrew H. Altieri, Aaron O'Dea, Nancy Knowlton, Matthieu Leray   +9 more
wiley   +1 more source

Fluctuation Relations Associated to an Arbitrary Bijection in Path Space. [PDF]

Math Phys Anal Geom
Chétrite R, Marcantoni S.
europepmc   +1 more source

Generation cycles in experimental populations of a multivoltine insect

Journal of Animal Ecology, EarlyView.
Although theory suggests various mechanisms by which environmental and ecological factors may drive generational fluctuations, our field‐cage experiment is the first to demonstrate how internal dynamics and external disturbances jointly produce synchronised, large‐scale outbreak cycles.
Takehiko Yamanaka, Yasushi Sato, William A. Nelson, Ottar N. Bjørnstad   +3 more
wiley   +1 more source

A note on the dynamics of extended-context disordered kinetic spin models. [PDF]

J Phys A Math Theor
Zavatone-Veth JA, Pehlevan C.
europepmc   +1 more source

The Consequences of Soil Organic Carbon for Crop Yield, Farm Productivity and Profit

Australian Journal of Agricultural and Resource Economics, EarlyView.
ABSTRACT Crop choices affect soil organic carbon (SOC) stocks, allowing farmers to manipulate the amount of carbon sequestered in the soil over time. This paper examines the private and public benefits of crop rotations that sequester additional carbon across the province of Saskatchewan, Canada using a novel field‐level dataset from the Saskatchewan ...
Devin Allen Serfas
wiley   +1 more source

Supplement to the paper "Asymptotic expansions of the distributions of the chi-square statistic based on the asymptotically distribution-free theory in covariance structures"

Supplement to the paper "Asymptotic expansions of the distributions of the chi-square statistic based on the asymptotically distribution-free theory in covariance structures"
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