Swarm robotics has experienced a rapid expansion in recent years, primarily fueled by specialized multi-robot systems developed to achieve dedicated collective actions. These specialized platforms are in general designed with swarming considerations at the front and center. Key hardware and software elements required for swarming are often deeply embedded and integrated with the particular syst...

Angiogenesis is a complex process, which is accomplished by reiteration of modules such as sprouting, elongation and bifurcation, that configures branching vascular networks. However, details of the individual and collective behaviors of vascular endothelial cells (ECs) during angiogenic morphogenesis remain largely unknown. Herein, we established a time-lapse imaging and computer-assisted anal...

In response to an extreme event, individuals on social media demonstrate interesting behaviors depending on their backgrounds. By making use of the large-scale datasets of posts and search queries collected from Twitter and GoogleTrends, we first identify the distinct categories of human collective online concerns and durations based on the distributions of solo tweets and new incremental tweet...

Agent-based modeling (ABM) is a common computational analysis tool to study system dynamics. In the framework of ABM, the system consists of multiple autonomous and interacting agents. We can explore emergent collective patterns by simulating the individual operations and interactions between agents. As a case study, we present an experiment using an agent-based model to study how competition f...

This paper describes the implementation of two biologically inspired collective behaviours on a group of Khepera miniature mobile robots. The rst experiment is concerned with the gathering and clustering of randomly distributed small cylinders. In the second experiment the group of robots are expected to remove long sticks from holes, requiring a synchronous collaboration between two robots. Th...

We present a set of experiments in which simulated robots are evolved for the ability to aggregate and move together toward a light target. By developing and using quantitative indexes that capture the structural properties of the emerged formations, we show that evolved individuals display interesting behavioral patterns in which groups of robots act as a single unit. Moreover, evolved groups ...

Since the end of 1970's-and the success of the New Classical School –, the face of macroeconomics has changed profoundly. On the one hand, the research has turned gradually away from the analysis of the short-term fluctuations to favor a study of the long term determining factors of macroeconomic variables. One has studied the determinants of growth and has interpreted the cycles as fluctuation...