Using Twitter to probe political polarization

We'd like to believe that our opinions are nuanced, balanced, high-minded, wise and above all, unique, but alas they are not—or so says Twitter. Most often, those we engage with on the popular social media site are like-minded, ...

Countries group into clusters as COVID-19 outbreak spreads

Mathematicians based in Australia and China have developed a method to analyze the large amount of data accumulated during the COVID-19 pandemic. The technique, described in the journal Chaos, can identify anomalous countries—those ...

Cow herd behavior is fodder for complex systems analysis

The image of grazing cows in a field has long conjured up a romantic nostalgia about a relaxed pace of rural life. With closer inspection, however, researchers have recognized that what appears to be a randomly dispersed ...

'Expansion entropy': A new litmus test for chaos?

Can the flap of a butterfly's wings in Brazil set off a tornado in Texas? This intriguing hypothetical scenario, commonly called "the butterfly effect," has come to embody the popular conception of a chaotic system, in which ...

Modeling Amazonian transitional forest micrometeorology

What can mathematical modeling teach us about the micrometeorology of the southern Amazonian 'transitional' forest? Quite a lot, it turns out. This particular forest is located between the rain forest of the Amazon Basin ...

Chimera state: How synchrony and asynchrony co-exist

Order and disorder might seem dichotomous conditions of a functioning system, yet both states can, in fact, exist simultaneously and durably within a system of oscillators, in what's called a chimera state. Taking its name ...

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