Results 41 to 50 of about 1,621,829 (188)

Octet Magnetic Moments with Null Instantons and Semibosonized Nambu-Jona-Lasinio Model [PDF]

, 1998
It is shown that the difference between the magnetic moment results in the quark model with null instantons and semibosonized Nambu-Jona-Lasinio model lies in the description of the magnetic moment of the $ \Lambda$-hyperon.Comment: RevTex, 6 pages ...
Bos J. W., Casu M., Delbourgo R., Durand L., ELENA N. BUKINA, Kim H.-C., Linde J., Montanet L., Pendron Lee G.   +8 more
core   +2 more sources

A model independent null test on the cosmological constant

, 2010
We use the Om statistic and the Genetic Algorithms (GA) in order to derive a null test on the spatially flat cosmological constant model $\Lambda$CDM. This is done in two steps: first, we apply the GA to the Constitution SNIa data in order to acquire a ...
Alam, Allanach, Arman Shafieloo, Becks, Bogdanos, Brewer, Clarkson, Crowder, Csaki, Daly, Efron, Hicken, Kelly, Lazkoz, Nesseris, Nesseris, Nesseris, Perivolaropoulos, Press, Readhead, Riess, Rojo, Sahni, Sahni, Sahni, Saini, Sanchez, Savvas Nesseris, Shafieloo, Shafieloo, Shafieloo, Shafieloo, Spergel, Sullivan, Tsoulos, Wang, Wang, Wang, Zunckel   +38 more
core   +1 more source

Assessing information-sharing networks within small-scale fisheries and the implications for conservation interventions

Royal Society Open Science, 2021
The effectiveness of behavioural interventions in conservation often depends on local resource users' underlying social interactions. However, it remains unclear to what extent differences in related topics of information shared between resource users ...
William N. S. Arlidge, Josh A. Firth, Joanna Alfaro-Shigueto, Bruno Ibanez-Erquiaga, Jeffrey C. Mangel, Dale Squires, E. J. Milner-Gulland   +6 more
doaj   +1 more source

Evidence for the Vacated Niche Hypothesis in Parasites of Invasive Mammals

Ecology and Evolution
Species redistribution and invasion are becoming increasingly common due to climate change and anthropogenic impacts. Understanding the resultant shifts in host–parasite associations is important for anticipating disruptions to host communities, disease ...
Annakate M. Schatz, Andrew W. Park
doaj   +1 more source

Role of Z-pinches in magnetic reconnection in space plasmas

, 2014
A widely accepted scenario of magnetic reconnection in collisionless space plasmas is the breakage of magnetic field lines in X-points. In laboratory, reconnection is commonly studied in pinches, current channels embedded into twisted magnetic fields. No
Divin, Andrey, Lapenta, Giovanni, Markidis, Stefano, Olshevsky, Vyacheslav   +3 more
core   +1 more source

Taxonomic nestedness based on guilds? Bird assemblages of the Jardines de la Reina National Park, Cuba, as study case

Animal Biodiversity and Conservation, 2020
Nestedness is a widely known structuring model in insular and fragmented biotas that has often been assessed, but most studies to date have used a taxonomic approach.
A. García–Quintas, D. Fundora Caballero, A. Parada Isada   +2 more
doaj   +1 more source

Environmental filtering and dispersal limitation jointly shaped the taxonomic and phylogenetic beta diversity of natural forests in southern China

Ecology and Evolution, 2021
Aim The mechanisms underlying the maintenance of biodiversity remain to be elucidated. Taxonomic diversity alone remains an unresolved issue, especially in terms of the mechanisms of species co‐existence.
Wei Shi, Yong‐Qiang Wang, Wu‐Sheng Xiang, Xian‐Kun Li, Kun‐Fang Cao   +4 more
doaj   +1 more source

Using Model Analysis to Unveil Hidden Patterns in Tropical Forest Structures

Frontiers in Ecology and Evolution, 2021
When ordinating plots of tropical rain forests using stand-level structural attributes such as biomass, basal area and the number of trees in different size classes, two patterns often emerge: a gradient from poorly to highly stocked plots and high ...
Nicolas Picard, Frédéric Mortier, Pierre Ploton, Jingjing Liang, Géraldine Derroire, Jean-François Bastin, Narayanan Ayyappan, Fabrice Bénédet, Faustin Boyemba Bosela, Connie J. Clark, Thomas W. Crowther, Nestor Laurier Engone Obiang, Éric Forni, David Harris, Alfred Ngomanda, John R. Poulsen, Bonaventure Sonké, Pierre Couteron, Sylvie Gourlet-Fleury   +18 more
doaj   +1 more source

Macrophytes assemblages in mountain lakes of Huerquehue National Park (39°S, Araucanía Region, Chile) Ensambles de macrófitas en lagos de montaña del Parque Nacional Huerquehue (39°S, Región de la Araucanía, Chile)

Latin American Journal of Aquatic Research, 2011
The lakes studied (Tinquilco, Verde, Toro, Chico) are located in the Huerquehue National Park (39°08'S, 71°40'W), Chile. An inventory of the aquatic and riparian species was performed between December 2005 and March 2006.
Enrique Hauenstein, Fabiola Barriga, Patricio de los Ríos-Escalante   +2 more
doaj  

Empirical likelihood test in a posteriori change-point nonlinear model

, 2014
In this paper, in order to test whether changes have occurred in a nonlinear parametric regression, we propose a nonparametric method based on the empirical likelihood.
Ciuperca, Gabriela, Salloum, Zahraa
core   +2 more sources