In this paper, we investigate a delayed Nicholson equation with delay harvesting term which was proposed in open problems and conjectures formulated by Berezansky et al. (Appl. Math. Model. 34: 1405–1417, 2010). The stability switching curves taking two delays as parameters are obtained via the method introduced An al.(J. Differ. Equ. 266: 7073–7100, 2019). existence of Hopf singularity on two-...

Patricia Nicholson Parker is the founder and director of New York-based non-profit arts organization Arts for Art. In this piece, she writes ways in which improvisation central to her work as both an artist organizer. She sees a strategy resistance degradation “the sacredness Life itself.”

and Applied Analysis 3 As in the classical Crank-Nicholson difference scheme, we will obtain a discrete approximation to the fractional derivative ∂U t, x /∂t at tn 1/2 , xi . Let H t, x 1 Γ 1 − α ∫ t 0 u s, x − u 0, x t − s α ds. 2.1

Alex B. Nielsen, ∗ Michael Jasiulek, † Badri Krishnan, ‡ and Erik Schnetter 3, § Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Am Mühlenberg 1, D-14476 Golm, Germany Center for Computation & Technology, 216 Johnston Hall, Louisiana State University, Baton Rouge, LA 70803, USA Department of Physics & Astronomy, 202 Nicholson Hall, Louisiana State University, Baton Rouge, ...

Maria Daghofer,1,* Andrew Nicholson,2,3 and Adriana Moreo2,3 1IFW Dresden, P.O. Box 27 01 16, D-01171 Dresden, Germany 2Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA 3Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 32831, USA (Received 15 February 2012; revised manuscript received 16 April 2012; p...

This paper is concerned with the periodic solutions for a class of new Nicholson-type delay system with nonlinear density-dependent mortality terms. By using coincidence degree theory, some criteria are obtained to guarantee the existence of positive periodic solutions of the model. Moreover, an example is employed to illustrate the main results.

T. NICHOLSON-ROBERTS, T. FLETCHER, P. REES, S. DICKSON, D. HINSLEY, M. BAILEY, L. LAMB and C. ARDLEY From the Neurosciences Intensive Care Unit, Wessex Neurological Centre, University Hospital Southampton, Southampton SO16 6YD, UK and Academic Department of Military Medicine, Royal Centre for Defence Medicine (Academia and Research), Medical Directorate, Joint Medical Command, ICT Centre, Birmi...