The resistance of two-dimensional soap froth cellular network has been measured experimentally. The resistance increases nonlinearly after a transient period. An iterative map using the substitution of simple resistor network has been used to describe the experimental observation. Calculation is...

The scaling of area and perimeter of n-sided cells versus n in a two-dimensional cellular pattern are investigated. Lewis' law states that 〈A(n)〉 is linear in n while Feltham's law states that the perimeter 〈E(n)〉 is linear in n. We have tested these two different predictions on soap...

Damage spreading(DS) of the random graph networks with power-law degree distributions is investigated using Glauber dynamics. Various subgraphs defined by the probability of acquaintance show distinct features in DS as measured by Hamming distance. A heuristic understanding of the long-time...

The ground state of the classical Heisenberg magnet on a square lattice with dilute frustrated bonds is found to be clusters of quartets of frustrated bonds forming ‘crosses’. As the temperature reaches T1, the cross phase changes to a mixed phase of singletons and pairs. At a much higher...

The fluctuation in the prices in a stock market can be separated into two time scales: a long term trend guided by financial principles and a short term trend governed by the specific trading mechanisms used. We proposed a mixed strategy for managing stock portfolios in which the long term trend...

The organizational structure of a network is investigated with a simulated precipitation model which does not make use of prior knowledge about the community structure of the network. The result is presented as a structure profile through which various definitions of communities can be applied...