The Abdus Salam International Centre for Theoretical Physics Modulational Instability and Pattern Formation in the Model of Dna Dynamics

United Nations Educational, Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS MODULATIONAL INSTABILITY AND EXACT SOLUTIONS FOR THE DISCRETE COMPLEX CUBIC QUINTIC GINZBURG-LANDAU EQUATION OF AN OPEN BOSE-EINSTEIN CONDENSATION

In this paper, we investigate analytically and numerically the modulational instability in a model of nonlinear physical systems like nonlinear periodic lattices. This model is described by the discrete complex cubic quintic Ginzburg-Landau equation with non-local quintic term. We produce characteristics of the modulational instability in the form of typical dependences of the instability growt...

United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS THE INFLUENCE OF TiO2 POLYMORPH, MECHANICAL MILLING AND SUBSEQUENT SINTERING ON THE FORMATION OF Ti-SUBSTITUTED SPINEL-RELATED Li0.5Fe2.5O4

United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS SELF-CONSISTENT NONLINEARLY POLARIZABLE SHELL-MODEL DYNAMICS FOR FERROELECTRIC MATERIALS

We investigate the dynamical properties of the polarizable shell-model with a symmetric double Morse-type electron-ion interaction in one ionic species. A variational calculation based on the Self-Consistent Einstein Model (SCEM) shows that a theoretical ferroelectric (FE) transition temperature can be derived which demonstrates the presence of a first-order phase transition for the potassium s...

United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS THE GENERALIZED MODEL OF POLYPEPTIDE CHAIN DESCRIBING THE HELIX-COIL TRANSITION IN BIOPOLYMERS

IC/98/220 United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS THE KINETIC SPIN-1 BLUME-CAPEL MODEL WITH COMPETING DYNAMICS

We have studied by means of Monte-Carlo simulation and exact finite-size analysis, the spin-1 Blume Capel model with Glauber and Kawasaki dynamics. The Kawasaki spin exchange process flows energy into the system from an external source. Some phase diagrams of the model are presented. For some values of the parameters, the system displays a kind of self organization phenomenon within the disorde...