From individual to collective chirality in metal nanoparticles

Nanoscale chirality in metal and semiconductor nanoparticles

The field of chirality has recently seen a rejuvenation due to the observation of chirality in inorganic nanomaterials. The advancements in understanding the origin of nanoscale chirality and the potential applications of chiroptical nanomaterials in the areas of optics, catalysis and biosensing, among others, have opened up new avenues toward new concepts and design of novel materials. In this...

From individual to collective dynamics in Argentine ants (Linepithema humile).

In this paper we propose a model for the formation of paths in Argentine ants when foraging in an empty arena. Based on experimental observations, we provide a distribution for the random change in direction that they approximately undergo while foraging as a mixture of a Gaussian and a Pareto distribution. By following the principles described in previous work, we consider persistence and rein...

From Individual to Collective Behavior in Bacterial Chemotaxis

Bacterial chemotaxis is widely studied from both the microscopic (cell) and macroscopic (population) points of view, and here we connect these very different levels of description by deriving the classical macroscopic description for chemotaxis from a microscopic model of the behavior of individual cells. The analysis is based on the velocity jump process for describing the motion of individual...

Mandevillian Intelligence: From Individual Vice to Collective Virtue

From Individual to Collective Attention – Models and Dynamics

In media-rich living spaces (like cities of the future, urban and rural living residencies, virtual societies, etc.), where thousands of people are overflooded with signals and messages at all levels of perception and modalities (visual, auditory, tactile, olfactory) while engaging -actively or passivelyin the mechanisms of social life and society, the (i) dynamics of individual attention and t...