Genetic differentiation among Spotted Owl (Strix occidentalis) subspecies has been established in prior studies. These investigations also provided evidence for introgression and hybridization among taxa but were limited by a lack of samples from geographic regions where subspecies came into close contact. We analyzed new sets of samples from Northern Spotted Owls (NSO: S. o. caurina) and Calif...

Recent genomic studies have highlighted the important role of admixture in shaping genome-wide patterns of diversity. Past admixture leaves a population genomic signature of linkage disequilibrium (LD), reflecting the mixing of parental chromosomes by segregation and recombination. These patterns of LD can be used to infer the timing of admixture, but the results of inference can depend strongl...

A 3-dimensional finite element algorithm for modeling nonlinear frictional contact behaviours between deformable bodies with the node-to-point contact element strategy has been proposed and applied here to investigate stress evolution processes of a nonlinear frictional contact system. The numerical results of a typical intra-plate fault bend model demonstrate the efficiency and usefulness of t...

Current models for membrane fusion in diverse biological processes are focused on the local action of fusion proteins present in the contact zone where the proteins anchored in one membrane might interact directly with the other membrane. Are the fusion proteins outside of the contact zone just bystanders? Here we assess the role of these "outsider" proteins in influenza virus hemagglutinin-med...

In this paper, a three-dimensional finite element model has been developed to simulate the laser-TIG hybrid welding (HLAW) of stainless steel 1.4418 with thickness of 4 mm. Transient temperature profile and dimensions of the fusion zone and heat affected zone (HAZ) during welding process are calculatedusing finite element method (FEM) and were solved in the ABAQUS/Standard software.The heat sou...

We propose a new sensor element for a tactile sensor skin which covers a large area such as a whole surface of a robot. The element acquires not only contact force but also contact area by using the nonlinear elasticity of skin materials. This paper provides the structure and theory of our tactile sensor element, and presents experimental results.

A new contact algorithm is presented which satisfies both stability and the contact patch test. The segment-to-segment algorithm involves a contact pressure interpolation and an accurate integration of the contact constraints over the surfaces of the contacting bodies. Numerical integration is carried out over sub-segments based on the element topologies of both contacting surfaces. The algorit...

Theoretical studies of physical processes and phenomena in the zone interaction nanoinstruments with surfaces elements microsystem technology are carried out work. Based on conducted research, mathematical models energy heat exchange contact nanometric dimensions were compiled, their analytical solution was obtained using Fourier method separation variables Goodman’s integral method. Simultaneo...