نتایج جستجو برای: newellwhitehead segel equation
تعداد نتایج: 230181 فیلتر نتایج به سال:
OR13-002 Recessive mutations in CECR1, encoding adenosine deaminase 2 (ADA2), cause systemic and cutaneous polyarteritis nodosa (PAN) E Levy-Lahad, P Elkan-Navon, R Segel, SB Pierce, T Walsh, J Barash, S Padeh, A Zlotogorski, YY Berkun, JJ Press, M Mukamel, PJ Hashkes, LL Harel, M Tekin, F Yalcinkaya, O Kasapcopur, EF Emirogullari, MK Lee, RE Klevit, PF Renbaum, A Weinberg-Shukron, S Zeligson, ...
We study the Keller–Segel model of chemotaxis and develop a composite particle-grid numerical method with adaptive time stepping which allows us to resolve and propagate singular solutions. We compare the numerical findings (in two dimensions) with analytical predictions regarding formation and interaction of singularities obtained through analysis of the stochastic differential equations assoc...
We are concerned with the finite-element approximation for the Keller-Segel system that describes the aggregation of slime molds resulting from their chemotactic features. The scheme makes use of a semi-implicit time discretization with a time-increment control and Baba-Tabata’s conservative upwind finite-element approximation in order to realize the positivity and mass conservation properties....
A quasilinear degenerate parabolic system modelling the chemotactic movement of cells is studied. The system under consideration has a similar structure as the classical Keller-Segel model, but with the following features: there is a threshold value which the density of cells cannot exceed and the flux of cells vanishes when the density of cells reaches this threshold value. Existence and uniqu...
We study an anomalous behavior observed in interacting E. coli populations. When two populations of E. coli are placed on opposite ends of a long channel with a supply of nutrient between them, they will travel as pulses toward one another up the nutrient gradient. We present experimental evidence that, counterintuitively, the two pulses will in some cases change direction and begin moving away...
∂ν = 0, x ∈ ∂ , where is the Laplace operator, is a smooth bounded domain in R(N ≥ 2), ν is the unit outward normal vector to ∂ , 2< p < 2N/(N−2) for N ≥ 3, 2< p <+∞ for N = 2, and ε > 0 is a constant. Problem (P)ε may be viewed as prototype of pattern formation in biology. Indeed, the steady-state problem for a chemotactic aggregation model with logarithmic sensitivity is reduced by Keller and...
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