The outcome of selection in structured populations with spatially varying selection pressures depends on the interaction of two factors: the level of gene flow and the amount of heterogeneity among the demes. Here we investigate the effect of three different levels of spatial heterogeneity on the levels of genetic polymorphisms for different levels of gene flow, using a construction approach in...

Sending IP packets over multiple parallel links is in extensive use in today’s Internet and its use is growing due to its scalability, reliability and cost-effectiveness. To maximize the efficiency of parallel links, load balancing is necessary among the links, but it may cause the problem of packet reordering. Since packet reordering impairs TCP performance, it is important to reduce the amoun...

We develop a novel load-balancing packet scheduler for parallel forwarding systems. By investigating flow level characteristics of Internet traffic, we are able to trace the root for load imbalance in hash-based loadsplitting schemes. Our scheduler capitalizes on the non-uniform flow reference pattern and especially the presence of a few high-rate flows in typical Internet traffic mix. We show ...

A b s t r a c t . We present parallel lattice-Boltzmann simulations of fluid flow in a centrifugal elutriation chamber, a cell separation device for human blood cells. The critical factor in this separation technique is the hydrodynamic flow field. Understanding the influence of design parameters of a chamber on the flow field is important in optimizations of this process. Two different issues ...

with the growth in customers’ demand diversification, mixed-model u-lines (mmul) have acquired increasing importance in the area of assembly systems. there are generally two different approaches in the literature for balancing such systems. some researchers believe that since the types of models can be very diverse, a balancing approach without simultaneously sequencing of models will not yield...