Now showing items 51-70 of 277

• #### Can wild ungulate carcasses provide enough biomass to maintain avian scavenger populations? An empirical assessment using a bio-inspired computational model ﻿

(Public Library of Science (PLoS), 2011)
Background: The reduction in the amount of food available for European avian scavengers as a consequence of restrictive public health policies is a concern for managers and conservationists. Since 2002, the application of ...
• #### Carrion ecology modelling for vulture conservation : are vulture restaurants needed to sustain the densest breeding population of the African white-backed vulture? ﻿

(Wiley, 2015)
As obligate scavengers, vultures are entirely dependent on carrion resources. In this study we model the carrion ecology of an ecosystem in Swaziland which is home to the densest breeding population of the African White-backed ...
• #### Center conditions and limits cycles for bilienard systems ﻿

(Texas State University, 2017)
In this article we study the center problem for polynomial BiLiénard systems of degree n. Computing the focal values and using Gröbner bases we end the center conditions for such systems for n = 6. We also establish ...
• #### Center conditions for generalized polynomial Kukles systems ﻿

(American Institute of Mathematical Sciences, 2017)
• #### Centers for the Kukles homogeneous systems with even degree ﻿

(Shanghai Normal University & Wilmington Scientific Publisher, 2017)
For the polynomial differential system x˙=−y, y˙=x+Qn(x,y), where Qn(x,y) is a homogeneous polynomial of degree n there are the following two conjectures done in 1999. (1) Is it true that the previous system for n≥2 has a ...
• #### Centers for the Kukles homogeneous systems with odd degree ﻿

(London Mathematical Society, 2015)
For the polynomial differential system x˙ = −y, y˙ = x+Qn(x; y), where Qn(x; y) is a homogeneous polynomial of degree n there are the following two conjectures done in 1999. (1) Is it true that the previous system for ...
• #### Centers of weight-homogeneous polynomial vector fields on the plane ﻿

(American Mathematical Society, 2017)
We characterize all centers of a planar weight-homogeneous polynomial vector fields. Moreover we classify all centers of a planar weight-homogeneous polynomial vector fields of degrees $6$ and $7$.
• #### Characterizing identifying codes from the spectrum of a graph or digraph ﻿

(Elsevier, 2019)
A (1, ≤ ℓ)-identifying code in digraph D is a dominating subset C of vertices of D, such that all distinct subsets of vertices of D with cardinality at most ℓ have distinct closed in-neighborhoods within C. As far as we ...
• #### Chiellini Hamiltonian Liénard differential systems ﻿

(Texas State University, 2019)
We characterize the centers of the Chiellini Hamiltonian Li´enard second-order differential equations x 0 = y, y 0 = −f(x)y − g(x) where g(x) = f(x)(k − α(1 + α) R f(x)dx) with α, k ∈ R. Moreover we study the ...
• #### Clan information market games ﻿

(Springer US, 2016)
We introduce a TU-game that describes a market where information is distributed among several agents and all these pieces of information are necessary to produce a good. This situation will be called clan information market. ...