In a previous paper (C. Wagner et al., Phys. Rev. E 54 (1996) 5073), we derived a macroscopic traffic model from a Boltzmann-like equation by neglecting third- and higher-order cumulants. To find higher-order approximations, we now employ a Chapman-Enskog expansion to calculate the third-order...

We present experimental results of the flow of dilute and semi-dilute polymer solutions in co-rotating Taylor–Couette cylinders. The experimental set-up consists of a modified Mars II rheometer (Thermo Scientific) with two drive units that are mounted opposite each other. The rotational...

In previous papers it has been shown that adding a positive scalar self-interaction (ψψ)2 to the Dirac field Lagrangian provides a reasonably satisfactory model to describe the barions. In this work, we analyze other solutions of the same nonlinear Dirac equation, making progress in the...