An evolutionary programming algorithm with adaptivemutation operators based on L evy prob ability distribution is studied L evy stable distri bution has an in nite second moment Because of this L evy mutation is more likely to generate an o spring that is farther away from its parent than Gaussian mutation which is often used in evolu tionary algorithms Such likelihood depends on a parameter in...

The standard Particle Swarm Optimization (PSO) studies its own previous best solution and the group’s previous best to optimize problems. One problem exists in PSO is its tendency of trapping into local optimum. To avoid this problem, in this paper a new PSO (LHPSO)is presented by combining a Lévy mutation based on Lévy Distribution on the best particle so that the mutated best particle could l...

Among political theorists there is a dispute over the status of ideal theory [see, for instance, Pennington (2011), Tomasi (2012)]. Ideal theory is characterized by its reliance on abstract arguments and thought experiments concerning questions such as: What is justice? or What rights do we owe each other? As such, ideal theory will always have a place in philosophy departments. However, recent...

In implicit upwind methods for the solution of linearized Euler equations, one of the key issues is to balance large time steps, leading to a fast convergence behavior, and small time steps, needed to sufficiently resolve relevant flow features. A time step is determined by choosing a CourantFriedrichs-Levy (CFL) number in every iteration. A novel CFL evolution strategy is introduced and compar...

We model the plume ‘splashback’ phase of the Shoemaker-Levy 9 (SL9) collisions with Jupiter. We modified the ZEUS-3D hydrodynamic code to include radiative transport in the gray approximation, and present validation tests. After initializing with a model Jovian atmosphere, we couple mass and momentum fluxes of SL9 plume material, as calculated by the ballistic Monte-Carlo plume model of Paper I...

We study parameter estimation for discretely observed stochastic differential equations driven by small Levy noises. There have been many applications of small noise asymptotics to mathematical finance and insurance. Using small noise models we can deal with both applications and statistical inference. We do not impose Lipschitz condition on the dispersion coefficient function and any moment co...

Dr Levy [1] commented on the study of Kerlin and colleagues [2] on the relevance, or futility, of night-time intensivists. Kerlin and colleagues compared in-hospital night-time intensivist presence with night-time phone consultations by daytime intensivists (control) with regard to ICU length of stay, hospital mortality, and readmission rate. Randomized 7 day blocks of night-time intensivist pr...

BACKGROUND We conducted a case study of the Zimbabwe National AIDS Trust Fund ('AIDS Levy') as an approach to domestic government financing of the response to HIV and AIDS. METHODS Data came from three sources: a literature review, including a search for grey literature, review of government documents from the Zimbabwe National AIDS Council (NAC), and key informant interviews with representat...

We study fine properties of Lévy trees that are random compact metric spaces introduced by Le Gall and Le Jan in 1998 as the genealogy of continuous state branching processes. Lévy trees are the scaling limits of Galton-Watson trees and they generalize Aldous’s continuum random tree which corresponds to the Brownian case. In this paper we prove that Lévy trees have always an exact packing measu...