Detecting intense hurricanes from low resolution datasets via dynamical indicators

Tropical cyclones are among the most extreme and costly weather events. In the United States, hurricane Katrina in 2005 alone caused damage equal to roughly 1% of the country’s gross domestic product. Read more

Heterogeneity of Aftershock Productivity Along the Mainshock Ruptures and Its Advantage in Improving Short-Term Aftershock Forecast

Large earthquakes generate aftershocks, the spatiotemporal patterns of which reveal details of how the strain energy in the Earth’s crust relaxes following a main rupture. Prior research has established that aftershocks correlate with regions of low co-seismic slip – slip which occurs at the instant of an earthquake – and of increased shear stress. Read more

Magnetic reconnection, the existential risks of searching for alien civilizations and carbon emissions in Africa

Here are links to a few recent articles by LML External Fellow Mark Buchanan. Read more

Search efficiency of discrete fractional Brownian motion in a random distribution of targets

In foraging for food, biological organisms explore terrain in search of irregularly dispersed sources. Mathematically, such foraging processes can be modelled using stochastic processes, and in the simplest paradigm – Gaussian spreading generated by random walks or Brownian motion – the mean square displacement of an ensemble of moving agents grows linearly in time. Read more

Statistical simulator for the engine knock

Although the automotive industry is rapidly shifting to electric cars, Hybrid Electric Vehicles (HEVs) – with both an electric motor and an internal combustion engine – will still dominate for the next half century. Read more

Anomaly detection and classification in traffic flow data from fluctuations in the flow–density relationship

An important goal in highway traffic management is event detection – finding ways to use real-time data to alert authorities to potential problems as they begin to emerge. Read more

Uncertainty relation between detection probability and energy fluctuations

A particle following a classical random walk on a finite graph will explore the system completely, in time visiting every site repeatedly. The process is ergodic. Read more

Assessing the Potential Earthquake Precursory Information in ULF Magnetic Data Recorded in Kanto, Japan during 2000–2010: Distance and Magnitude Dependences

Since ancient times, scientists have sought to identify precursory signals which might allow the prediction of impending earthquakes or volcanic eruptions. Read more

Existence of multiple noise-induced transitions in a Lasota-Mackey map

The addition of stochastic noise to a deterministic dynamical system can induce dramatic qualitative changes in its behaviour. In one counterintuitive effect – termed noise induced order – the addition of noise to an already chaotic system can make its behaviour more orderly and regular. Read more

Industrial Topics in Urban Labor System

Dividing things into categories is a human habit, helping us to learn and understand the external world, as well as to share and communicate knowledge. Read more