We introduce and study a novel design for a ratchet potential for soliton excitations. The potential is implemented by means of an array of point-like (delta) inhomogeneities in an otherwise homogeneous potential. We use collective coordinates which predict that the effective potential acting on...

We study the effect of the composition of the genetic sequence on the melting temperature of double stranded DNA, using some simple analytically solvable models proposed in the framework of the wetting problem. We review previous work on disordered versions of these models and solve them when...

Chemical vapor transport by gas (CVTG) is a new method to grow semiconductor thin films, transparent conductors and hence solar cell structures economically. This technique can be divided into (1) reactive CVTG (RCVTG), and (2) condensation CVTG (CCVTG). In the present study CuInSe2 film is...