We prove L 1 uniqueness and stability for a resonant 2 2 system of conservation laws that arise as a model for two phase polymer ow in porous media. The analysis uses the equivalence of the Eulerian and Lagrangian formulation of this system, and the results are rst established for an auxiliary scalar equation. Our methods are based on front tracking approximations for the auxiliary equation, an...

Cover (from top): counterion density between two colloidal particles (p. 19); spinodal decomposition in a binary polymer film (p. 6); physical mechanism of long-range optical speckle correlations (p. 37); light-induced colloidal crystal (p. 27); eutectic crystal of magnetic colloids (p. 29).

The wandering exponent u for an isotropic polymer is predicted remarkably well by a simple argument due to Flory. By considering oriented polymers living in a oneparameter farniy of background tangent fields, we are able to relate the wandering exponent to the exponent in the background field through an e-expansion. We then choose the background field to have the same correlations as the indivi...

A nanofluidic cross-slot device is designed and fabricated to investigate the effects of slitlike confinement on the electrophoretic stretching of single DNA molecules. The device is capable of trapping and stretching single DNA molecules at the stagnation point of a homogeneous planar elongational electric field. Different from studies of unconfined DNA, the longest relaxation time in slitlike...

In this contribution we present a new concept of the large acceptance detector systems based on organic scintillators which may allow for simultaneous diagnostic of large fraction of the human body. Novelty of the concept lies in employing large blocks of polymer scintillators instead of crystals as detectors of annihilation quanta, and in using predominantly the timing of signals instead of th...

We review the current state on the thermodynamic behavior and structural phases of selfand mutually-attractive dilute semiflexible polymers that undergo temperature-driven transitions. In extreme dilution, polymers may be considered isolated, and this single polymer undergoes a collapse or folding transition depending on the internal structure. This may go as far as to stable knot phases. Addin...