Celso Grebogi, ' Stephen M. Hammel, ' ' James A. Yorke, ' and Tim Sauer "'Laboratory for Plasma Research, University of Maryland, College Park, Maryland 20742 ' 'institute for Physical Science and Technology and Department of Mathematics, University of Maryland, College Park, Maryland 20742 ' 'lvaval Surface Warfare Center, Silter Spring, Maryland 20903-5000 'Department of Mathematical Sciences...

Ditza Auerbach, ' Celso Grebogi, '1 Edward Ott, ' and James A. Yorke ' Laboratory for Plasma Research, University of Maryland, College Park, Maryland 20742 '2~institute for Physical Sciences and Technology and Department ofMathematics, University of Maryland, College Park, Maryland 20742 t 1Department of Physics and Department of Electrical Engineering, University of Maryland, College Park, Mar...

This article examines elite women’s agency and participation in the literary life of country house, focusing on circle that centred Jemima Marchioness Grey her husband, Philip Yorke, at Wrest Park Bedfordshire. The “Society Wrest” was an exclusive group close friends family included Grey’s childhood friends, Mary Gregory (née Grey) Catherine Talbot, as well sisters-in-law, Elizabeth Anson Marga...

Being outdoors in a natural environment is thought to be restorative and relaxing (Kaplan & Kaplan, 1989). For people with dementia, nature and outdoor spaces (‘ingericht groen’) can provide a stimulating environment with exposure to light and sensory experiences (Burns et al. 2002; GuissetMartinez et al., 2013) as well as engagement in pleasant activities (Mac-Donald, 2002). It is reported tha...

We introduce a notion of conditional memory loss for nonequilibrium open dynamical systems. We prove that this type of memory loss occurs at an exponential rate for nonequilibrium open systems generated by one-dimensional piecewise-differentiable expanding Lasota-Yorke maps. This result may be viewed as a prototype for time-dependent dynamical systems with holes.

Let Xn = {z ∈ C : z n ∈ [0, 1]}, n ∈ N, and let f : Xn → Xn be a continuous map such that f(0) = 0. In this paper we prove that f is chaotic in the sense of Li–Yorke iff there is a strictly increasing sequence of positive integers A such that the topological sequence entropy of f relative to A is positive.