N E of the major objections to the torsion theory of crossing over as pro-0 posed by DARLINGTON (1935) is that it is difficult to comprehend why a break in one chromatid should cause a break to occur in exactly the same position in a chromatid from the homologous chromosome. This objection holds for any mechanism which postulates that crossing over occurs after the duplication of the chromosome...

We consider the motion planning problem for a 2-link robot amidst polygonal obstacles. The two links are normally allowed to cross each other, but in this paper, we introduce the non-crossing version of this robot. This 4DOF configuration space is novel and interesting. Using the recently introduced algorithmic framework of Soft Subdivision Search (SSS), we design a resolution-exact planner for...

This paper is concerned with the traveling waves for a class of delayed non-local diffusion equations with crossing-monostability. Based on constructing two associated auxiliary delayed non-local diffusion equations with quasi-monotonicity and a profile set in a suitable Banach space using the traveling wave fronts of the auxiliary equations, the existence of traveling waves is proved by Schaud...

Nearest Neighbor (NN) data association method is the most popular and widely used algorithm for target tracking in the presence of clutter, due to its acceptable performance and low computational complexity. Despite of the good performance of this algorithm in single target tracking and even Multi-Target Tracking (MTT) with non-crossing paths scenarios, its performance degrades significantly in...

Self-diffusivity of a large tracer ring polymer, Dr, immersed in a matrix of linear polymers with Nl monomers each shows unusual length dependence. Dr initially increases, and then decreases with increasing Nl. To understand the relationship between the nonmonotonic variation in Dr and threading by matrix chains, we perform equilibrium Monte Carlo simulations of ring-linear blends in which the ...