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Complexity Digest's Blog

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Geometrical effects on mobility

August 31, 2018 Comments (0)

In this paper we analyze the effect of randomly deleting streets of a synthetic city on the statistics of displacements. Our city is constituted initially by a set of streets that form a regular tessellation of the euclidean plane. Therefore we will have three types of cities, formed by squares, triangles or hexagons. We studied the complementary cumulative distribution function for displacements (CCDF). For the whole set of streets the CCDF is a stretched exponential, and as streets are...

On the networked architecture of genotype spaces and its critical effects on molecular evolution

August 31, 2018 Comments (0)

Evolutionary dynamics is often viewed as a subtle process of change accumulation that causes a divergence among organisms and their genomes. However, this interpretation is an inheritance of a gradualistic view that has been challenged at the macroevolutionary, ecological and molecular level. Actually, when the complex architecture of genotype spaces is taken into account, the evolutionary dynamics of molecular populations becomes intrinsically non-uniform, sharing deep qualitative and...

The Wisdom and/or Madness of Crowds

August 30, 2018 Comments (0)

an interactive guide to human networks Source: ncase.me

Expanding the Active Inference Landscape: More Intrinsic Motivations in the Perception-Action Loop

August 30, 2018 Comments (0)

Active inference is an ambitious theory that treats perception, inference, and action selection of autonomous agents under the heading of a single principle. It suggests biologically plausible explanations for many cognitive phenomena, including consciousness. In active inference, action selection is driven by an objective function that evaluates possible future actions with respect to current, inferred beliefs about the world. Active inference at its core is independent from extrinsic rewards,...

Social transmission in networks: global efficiency peaks with intermediate levels of modularity

August 30, 2018 Comments (0)

In myriad biological systems, multiple lines of evidence indicate that modularity, wherein parts of a network are organized into modules such as subgroups in animal networks, may affect social transmission processes. In animal societies, there is increased interest in understanding variation in the effects of modularity on transmission as it may provide important insight into a given network’s performance, in addition to the evolutionary consequences the structure of the network may have for...

The first global trading network

August 28, 2018 Comments (0)

Little is known about the structural patterns and dynamics of the first global trading market (FGTM), which emerged during the sixteenth century as a result of the Iberian expansion, let alone how it compares to today’s global financial markets. Here we build a representative network of the FGTM using information contained in 8725 (handwritten) Bills of Exchange from that time—which were (human) interpreted and digitalized into an online database. We show that the resulting temporal...

Towards Digital Enlightenment – Essays on the Dark and Light Sides of the Digital Revolution, Dirk Helbing (Ed.)

August 27, 2018 Comments (0)

A new collection of essays by the author of the successful volume Thinking Ahead – Essays on Big Data, Digital Revolution, and Participatory Market SocietyExamines the dangers of a world in which algorithms and social bots aim to control both the societal dynamics and individual behaviors. Introduces novel approaches on how to redefine collective trust and build platforms to support core societal values Towards Digital EnlightenmentEssays on the Dark and Light Sides of the Digital...

Large-scale estimation of parking requirements for autonomous mobility on demand systems

August 27, 2018 Comments (0)

Cities everywhere are anticipating new mobility technologies to help solve issues with congestion and pollution while providing afforable, accessible, reliable and convenient transportation for growing populations. The adoption of self-driving vehicles is projected to happen soon and help with achieving these goals, especially if part of a shared mobility on demand service. Potential benefits of such a system include a reduction of the number of vehicles and freeing up parking spaces, while...

Transfer Entropy

August 27, 2018 Comments (0)

  Statistical relationships among the variables of a complex system reveal a lot about its physical behavior. Therefore, identification of the relevant variables and characterization of their interactions are crucial for a better understanding of a complex system. Correlation-based techniques have been widely utilized to elucidate the linear statistical dependencies in many science and engineering applications. However, for the analysis of nonlinear dependencies, information-theoretic...

Advances on the Resilience of Complex Networks (Complexity Special Issue)

August 26, 2018 Comments (0)

A common property of many complex systems is resilience, that is, the ability of the system to react to perturbations, internal failures, and environmental events by absorbing the disturbance and/or rebuild to maintain its functions. Nowadays, understanding how complex systems demonstrate resilience is critical in many different fields, because examples of collapses and crises caused by low resilience are more and more spreading all over the world including transportation, financial, energy,...