Risk is random: The magic of the d’Alembert

In 19th-century casinos, most common betting took the form of even-money bets placed on red or black in games such as Roulette. Strategy lay in deciding how much to wager on each bet, and when to quit playing. Read more

Interrupting vaccination policies can greatly spread SARS-CoV-2 and enhance mortality from COVID 19 disease: the AstraZeneca case for France and Italy

Vaccines against the SARS-CoV-2 virus appear, finally, to offer nations around the globe a pathway out of the COVID pandemic. Yet vaccines themselves come with potential risks of side-effects. In the aftermath of some three dozen or so cases of deaths from blood clots in recently vaccinated individuals, a handful of European nations recently paused their delivery of the AstraZeneca vaccine pending further study. Read more

Statistical Characterization of Airplane Delays

Before the COVID-19 pandemic, a major source of annoyance for international travelers was flight delays, caused by anything from engineering failures to simple traffic flow issues through the complex network of international airports. Read more

Analytic solution of the two-star model with correlated degrees

Network scientists rely on random graphs to model the behaviour of complex networks observed in social, technological, and biological systems. One common approach to such network modelling starts by measuring an empirical set of observables, and then builds an ensemble of random graphs to match these features in an average sense. Read more