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Our popular course Introduction to QuantLib Development will be taking place June 18-20th, 2018.


Complexity Digest's Blog

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Tomorrow’s Earth

July 5, 2018 Comments (0)

As the human population has grown over recent decades, our profound impact on the entire planet has become starkly apparent. Increasing affluence has led to expectations of good-quality health care, full employment, and the ability to live in cities that are safe, affordable, and clean. Yet these advantages for some come at a cost to others and to the planet itself. Human activities have led to a warming climate, massive landscape conversion, pollution, depletion of natural resources...

The power of many

July 5, 2018 Comments (0)

Three billion years ago, more or less, life crossed a threshold and began moving toward a multicellular existence. Evidence from multiple directions is showing how this hard-to-fathom leap might have been less difficult than once believed. The evolutionary histories of some groups of organisms record numerous transitions from single-celled to multicellular forms, suggesting the hurdles could not have been so high. Genetic comparisons between simple multicellular organisms and their...

Social Physics: Uncovering Human Behaviour from Communication

July 5, 2018 Comments (0)

In the post year 2000 era the technologies that facilitate human communication have rapidly multiplied. While the adoption of these technologies has hugely impacted the behaviour and sociality of people, specifically in urban but also in rural environments, their "digital footprints" on different data bases have become an active area of research. The existence and accessibility of such large population-level datasets, has allowed scientists to study and model innate human tendencies...

Assessing diversity in multiplex networks

July 5, 2018 Comments (0)

Diversity, understood as the variety of different elements or configurations that an extensive system has, is a crucial property that allows maintaining the system’s functionality in a changing environment, where failures, random events or malicious attacks are often unavoidable. Despite the relevance of preserving diversity in the context of ecology, biology, transport, finances, etc., the elements or configurations that more contribute to the diversity are often unknown, and thus, they...

Methods for Measuring Viability and Evaluating Viability Indicators

July 5, 2018 Comments (0)

Life and other dissipative structures involve nonlinear dynamics that are not amenable to conventional analysis. Advances are being made in theory, modeling, and simulation techniques, but we do not have general principles for designing, controlling, stabilizing, or eliminating these systems. There is thus a need for tools that can transform high-level descriptions of these systems into useful guidance for their modification and design. In this article we introduce new methods for quantifying...

Vulnerability to pandemics in a rapidly urbanizing society

July 5, 2018 Comments (0)

We examine salient trends of influenza pandemics in Australia, a rapidly urbanizing nation. To do so, we implement state-of-the-art influenza transmission and progression models within a large-scale stochastic computer simulation, generated using comprehensive Australian census datasets from 2006, 2011, and 2016. Our results offer the first simulation-based investigation of a population’s sensitivity to pandemics across multiple historical time points, and highlight three significant...

Complex Spreading Phenomena in Social Systems

July 5, 2018 Comments (0)

This text is about spreading of information and influence in complex networks. Although previously considered similar and modeled in parallel approaches, there is now experimental evidence that epidemic and social spreading work in subtly different ways. While previously explored through modeling, there is currently an explosion of work on revealing the mechanisms underlying complex contagion based on big data and data-driven approaches. This volume consists of four parts. Part 1 is an...

Semantic information, agency, and nonequilibrium statistical physics

July 5, 2018 Comments (0)

Information theory provides various measures of correlations holding between the states of two systems, which are sometimes called measures of "syntactic information". At the same time, the concept of "semantic information" refers to information which is in some sense meaningful rather than merely correlational. Semantic information plays an important role in many fields — including biology, cognitive science, artificial intelligence — and there has been a...

Twenty years of network science

July 5, 2018 Comments (0)

The idea that everyone in the world is connected to everyone else by just six degrees of separation was explained by the ‘small-world’ network model 20 years ago. What seemed to be a niche finding turned out to have huge consequences. Source:

The clock of chemical evolution

July 5, 2018 Comments (0)

Chemical evolution is essential in understanding the origins of life. We present a theory for the evolution of molecule masses and show that small molecules grow by random diffusion and large molecules by a preferential attachment process leading eventually to life’s molecules. It reproduces correctly the distribution of molecules found via mass spectroscopy for the Murchison meteorite and estimates the start of chemical evolution back to 12.8 billion years following the birth of stars...