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Complexity Digest's Blog

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How The "Internet Of Things" Is Turning Cities Into Living Organisms

December 9, 2011 Comments (0)

When city services can autonomously go online and digest information from the cloud, they can reach a level of performance never before seen. First up, water systems that automatically know when it will rain and react...
Fast Company

Dynamics of non-equilibrium communities

December 9, 2011 Comments (0)

Much effort in theoretical ecology has focused on identifying mechanisms that promote stable coexistence of species at equilibrium. However, in a consumer-resource model of competition along an environmental gradient, high-diversity assemblages have the potential to persist in non-equilibrium states for millions of generations with very little species...
Proc. R. Soc. B

The Dichotomy in Degree Correlation of Biological Networks

December 9, 2011 Comments (0)

Most complex networks from different areas such as biology, sociology or technology, show a correlation on node degree where the possibility of a link between two nodes depends on their connectivity. It is widely believed that complex networks are either disassortative (links between hubs are systematically suppressed) or assortative (links between hubs are enhanced). In this paper, we analyze a...
PLoS ONE

Context Modularity of Human Altruism

December 9, 2011 Comments (0)

Whereas altruism drives the evolution of human cooperation, ethno-religious diversity has been considered to obstruct it, leading to poverty, corruption, and war. We argue that current research has failed to properly account for the institutional environment and how it affects the role diversity plays. The emergence of thriving, diverse communities throughout human history suggests that diversity...
Science

Cooperation, structure and hierarchy in multiadaptive games

December 9, 2011 Comments (0)

Game-theoretical models where the rules of the game and the interaction structure both coevolves with the game dynamics -- multiadaptive games -- capture very flexible situations where cooperation among selfish agents can emerge. In this work, we will discuss a multiadaptive model presented in a recent Letter [Phys. Rev. Lett. 106, 028702 (2011)], and generalizations of it. The model captures a...
arXiv

Philosophy: Meditation in mind

December 9, 2011 Comments (0)

Buddhism is a distinctive world religion. It lacks an 'omnigod' — an omnipresent, omniscient, all-powerful creator — and a notion of humans as complexes of physical bodies and souls that ascend to heaven after death. Could it be mingled with the scientific culture of the twenty-first century to produce a new philosophical outlook on the world, the mind and our values? That idea lies at the...
Nature

Entangling Macroscopic Diamonds at Room Temperature

December 9, 2011 Comments (0)

Quantum entanglement in the motion of macroscopic solid bodies has implications both for quantum technologies and foundational studies of the boundary between the quantum and classical worlds. Entanglement is usually fragile in room-temperature solids, owing to strong interactions both internally and with the noisy environment. We generated motional entanglement between vibrational states of two...
Science

The structure of coevolving infection networks

December 9, 2011 Comments (0)

Disease awareness in infection dynamics can be modeled with adaptive contact networks whose rewiring rules reflect the attempt by susceptibles to avoid infectious contacts. Simulations of this type of models show an active phase with constant infected node density in which the interplay of disease dynamics and link rewiring prompts the convergence towards a well defined degree distribution,...
arXiv

Recurrent host mobility in spatial epidemics: beyond reaction-diffusion

December 9, 2011 Comments (0)

Human mobility is a key factor in spatial disease dynamics and related phenomena. In computational models host mobility is typically modeled by diffusion in space or on metapolulation networks. Alternatively, an effective force of infection across distance has been introduced to capture spatial dispersal implicitly. Both approaches do not account for important aspects of natural human mobility,...
Eur. Phys. J. B

Guiding the self-organization of random Boolean networks

December 9, 2011 Comments (0)

Random Boolean networks (RBNs) are models of genetic regulatory networks. It is useful to describe RBNs as self-organizing systems to study how changes in the nodes and connections affect the global network dynamics. This article reviews eight different methods for guiding the self-organization of RBNs. In particular, the article is focused on guiding RBNs toward the critical dynamical regime,...
Theory in Biosciences