N ov 1 99 8 Hydrodynamic interactions between many spheres

ar X iv : a st ro - p h / 99 11 40 7 v 1 2 2 N ov 1 99 9 The First Five Minutes of a Core Collapse Super - nova : Multidimensional Hydrodynamic Models

Short-time self-diffusion of nearly hard spheres at an oil–water interface

Optical microscopy and multi-particle tracking are used to study hydrodynamic interactions of monodisperse polymethylmethacrylate (PMMA) spheres at a decalin– water interface. The short-time self-diffusion coefficient measured at low surface coverage has the form D S (n)=αD0(1−βn), where n is the area fraction occupied by the particles, and D0 is the Stokes–Einstein diffusion coefficient in the...

. ge n - ph ] 4 N ov 1 99 8 Neutrino Propulsion for Interstellar

An exotic spacecraft propulsion technology is described which exploits parity violation in weak interactions. Anisotropic neutrino emission from a polarized assembly of weakly interacting particles converts rest mass directly to spacecraft impulse.

ar X iv : h ep - e x / 98 11 02 3 v 1 1 1 N ov 1 99 8 The structure of the photon and its interactions ∗

The OPAL experiment at LEP has performed a variety of measurements of γγ and eγ scattering at the ee collider LEP to gain a deeper insight into the structure of the photon and its interactions. This review presents a summary of these results.

Flagellar synchronization independent of hydrodynamic interactions.

Inspired by the coordinated beating of the flagellar pair of the green algae Chlamydomonas, we study theoretically a simple, mirror-symmetric swimmer, which propels itself at low Reynolds number by a revolving motion of a pair of spheres. We show that perfect synchronization between these two driven spheres can occur due to the motion of the swimmer and local hydrodynamic friction forces. Hydro...