![]() ![]() Name PCI Device Driver Admin Status Link Status Speed Duplex MAC Address MTU Description Gen10 HP "FlexFabric 20Gb 2-port 650FLB Adapter" > Big issues, VMs random loses network connectivity, packet drops. Gen9 with HP "FlexFabric 20Gb 2-port 650FLB Adapter" > Some issues, seen VMs acting weird, packet drops etc. Gen8 with HP "FlexFabric 10Gb 2-Port 534FLB Adapter" > No issues (Have around 12 gen8 servers) The first reason is that the average length of diffusion trajectories between two points is known to scale approximately as d 2 /$\lambda$ where d is the distance between the two points (1).Like you I only see the "issues" on gen9 and gen10 servers. There are two reasons why this observation may initially sound counter-intuitive. The average trajectory-length would therefore be the same for different experiments with any insect species-or for any type of diffusive corpuscular motion. Furthermore, this average time scales as R/v, which means that the average trajectory-length scales as R. between two direction-changes), and the single-scattering phase function p(u s, u i) (probability density function of the scattering direction u s for an incident direction u i). It is independent of the characteristics of the diffusion walk : the mean free path $\lambda$ (average distance between two scattering events, i.e. 2) indicate without any doubt that the average encounter time (time between entry into the circle and first exit), for a fixed velocity, depends only of the circle radius. Simple Monte Carlo simulations of such experiments (see Fig. The last assumption is that measurements are performed a long time after ants were dropped on the surface, so that the memory of their initial position is lost : this is enough to ensure that no specific direction is favored and therefore that when ants encounter the circle, their incident directions are distributed isotropically. We assume that a circle of radius R is drawn on the surface and we measure the average time that ants spend inside the circle when they enter it (see Fig. It is well established, for diverse species, that the spontaneous displacement of insects such as ants, on an horizontal planar surface, may be accurately mod-eled as a constant-speed diffusion random-walk. Let us first consider a practical animal-biology example that was at the origin of the theoretical work reported hereafter. This exact invariance property may be seen as a generalization to diffusion of the well known mean-chord-length property, leading to broad physics and biology applications. It is shown that for any (non-homogeneous) purely diffusing system, under any isotropic uniform incidence, the average length of trajectories through the system (the average length of the random walk trajecto-ries from entry point to first exit point) is independent of the characteristics of the diffusion process and therefore depends only on the geometry of the system. Download a PDF of the paper titled An invariance property of diffusive random walks, by Stephane Blanco (LAPLACE) and 1 other authors Download PDF Abstract:Starting from a simple animal-biology example, a general, somewhat counter-intuitive property of diffusion random walks is presented.
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