Starting from the gravitational potential of a Newtonian spheroidal shell we discuss electrically charged rotating prolate spheroidal shells in the Maxwell theory. In particular we consider two confocal charged shells which rotate oppositely in such a way that there is no magnetic field outside the outer shell. In the Einstein theory we solve the Ernst equations in the region where the long pro...

Using computer simulations we study how a corona of polymer molecules grafted to cellulose nanocrystal aggregate (CNA) particles influences the interaction between pairs of parallel CNAs. The resulting distance and orientation (face-to-face versus edge-to-edge) dependence is very rich and counterintuitive. Although the unperturbed polymer corona assumes cylindrical symmetry relatively quickly a...

Soft lithography based on photocurable perfluoropolyether (PFPE) was used to mold and replicate poly(styrene-b-isoprene) block-copolymer micelles within a broad range of shapes and sizes including spheres, cylinders, and torroids. These physically assembled nanoparticles were first formed in a selective solvent for one block then deposited onto substrates having various surface energies in an e...

The process of blending powders using stirring blades involves complicated granular flows, particle-scale mechanisms, and blade–particle interactions, which is challenging to predict control. This article proposes a continuum-based model for such by incorporating the flow rheology, isotropic particle diffusion percolation materials. A method combining finite element (FEM), difference (FDM), imm...

We propose a scheme to calculate the reduced plasma frequency of cylindrical-shaped electron beam flowing inside cylindrical tunnel, based on results obtained from Particle-in-cell (PIC) simulations. In PIC simulations, we modulate using two parallel, non-intercepting, closely-spaced grids which are electrically connected together by single-tone sinusoidal voltage source. The energy and current...

We present the design and experimental analysis of a dielectrophoretic trap composed of four microfabricated gold posts excited in a quadrupolar fashion. Using quantitative modeling tools, we have designed these extruded traps to attain strong holding against flow while being constrained by a set of system parameters. The extruded geometry consists of cylindrical electrodes in a trapezoidal arr...

The Mark II experiment first started taking data in 1978 at the SLAC SPEAR storage ring. It was the first e+edetector with a large, many layer cylindrical drift chamber (CDC) and a large liquid argon calorimeter!” After two years at SPEAR, it was moved to the PEP storage ring, where it was upgraded a year later with a seven layer precision vertex drift chamber!’ located between the CDC and the ...

This paper describes a model for the analysis of drag on flexible red blood cell considering different assumed shapes of red blood cells in narrow capillary of diameter of the same order as that of the cells or slightly greater. We have considered Krogh cylindrical model of the capillary surrounded by tissue. The blood cell was assumed as particle suspended in plasma flowing in axisymmetric Sto...

The behavior of mesoscopic particles dissolved in a dilute solution of long, flexible, and nonadsorbing polymer chains is studied by field-theoretic methods. For spherical and cylindrical particles the solvation free energy for immersing a single particle in the solution is calculated explicitly. Important features are qualitatively different for self-avoiding polymer chains as compared with id...

We study actions in (2 + 1)-dimensions associated with null curves whose Lagrangians are arbitrary functions f on the curvature of the particle path, showing that null helices are always possible trajectories of the particles for every function f . The vector field P , obtained from the Euler-Lagrange equation, can be interpreted as the linear momentum of the particle since it is constant along...