We propose an agent-based model to simulate the creation of street gang rivalries. The movement dynamics of agents are coupled to an evolving network of gang rivalries, which is determined by previous interactions among agents in the system. Basic gang data, geographic information, and...

The agent-based model treated in the present study describes dynamics of two types of population in a gravity-like potential field. In previous studies, the model was known to exhibit various spatiotemporal patterns on two-dimensioanl lattice systems. However, the patterns were classified...

A new concept of the available force is proposed to investigate the performance of the complex systems having long-duration memory. Since the covariance of average velocity in double time interval and available force equals zero, it is possible to calculate the conditional probability...

The articles in this special issue are based upon a selection of papers presented at the 'Brisbane Club' section of the 2007 STOREP Conference. We provide introductory reviews of these articles and briefly assess their contributions to the advancement of our understanding of economic evolution,...

The authors answer the question yes. This argument is justified by the history of the evolution of mankind’s perceptions about the future. It is also stressed that civilization in its development came to a critical point, which may culminate in a collapse or a breakthrough in the future. The...

Distribution of extinction sizes constructed from original fossil records exhibits not a single, but a double power-law, with tail exponents being roughly the same in different scales, i.e., for species, families and orders. Moreover, time correlations of extinction sizes decrease with a...

Human history leaves fingerprints in human languages. Little is known about language evolution and its study is of great importance. Here we construct a simple stochastic model and compare its results to statistical data of real languages. The model is based on the recent finding that language...

We investigate the spatial and temporal structures of four financial markets in Greater China. In particular, we uncover different characteristics of the four markets by analyzing the sector and subsector structures which are detected through the random matrix theory. Meanwhile, we observe that...

Resilience management performance comprise the resilience management processes: building awareness of resilience issue, selection of essential organizational components, selection of organizational operation, identification and prioritization of keystone vulnerability. Management knowledge...