Using a self-consistent Hartree-Fock approximation we investigate the relative stability of various stripe phases in the extended t-t-U Hubbard model. One finds that a negative ratio of nextto nearest-neighbor hopping t/t < 0 expells holes from antiferromagnetic domains and reinforces the stripe order. Therefore the half-filled stripes not only accommodate holes but also redistribute them so th...

We consider a discrete forest-fire model on the upper half-plane of the two-dimensional square lattice. Each site can have one of the following two states: “vacant” or “occupied by a tree”. At the starting time all sites are vacant. Then the process is governed by the following random dynamics: Trees grow at rate 1, independently for all sites. If an occupied cluster reaches the boundary of the...

We report the results of an agent-based model to study the strategies that policy makers can apply to prevent the escalation of deviant behaviour in the aftermath of a disaster. Three policies are tested, namely: a reinforcement of the police power; an increase of the information available to the affected population and a combination of both policies. We test the effect of time in the implement...

In the aftermath of the financial crisis, with periphery countries in the European Union even more falling behind the core countries economically, there have been quests for various kind of fiscal policies in order to revert divergence. How these policies would unfold and perform comparatively is largely unknown. We analyze four such stylized policies in an agent-based macroeconomic model and s...

Abstract Inthispaper,anewsemi-activemagnetorheological(MR)enginemountinhalfcarmodelisproposed for improving ride comfort. Such a model uses a dynamic sliding mode controller. It operates as a controller system for controlling the magnetic field strength of the engine mount coil. Controlling the magnetic field strength leads to change the magnetorheological liquid properties and thereby the gene...