atmosphere

Switching dynamics in atmospheric flow

The jet stream is a band of air that flows around the Earth at high-altitude, moving West to East in mid-latitude regions. This so-called “zonal” flow typically has cyclones and anticyclones embedded within it, which last for a few days. Read more

Small cities blog image

Small Cities Face Greater Impact From Automation

Cities are modern society’s hubs for economic productivity and innovation, and now accommodate over half of the world’s population. As job migration is the leading factor in urbanization, policymakers are increasingly concerned about the likely impact of artificial intelligence and automation on city employment. Read more

saturn rings

Scaling Behaviour in Mathematical Models of Aggregation

The rings of Saturn are among the most spectacular structures in our solar system, made up of innumerable fragments of ice and rock ranging in size from metres to millimetres. The stability of the rings is a matter of some debate among planetary scientists. Read more

Northern Hemisphere Blog Image

Sampling the Dynamical Properties of Northern Hemisphere Atmospheric Fields Over the Past 60 Years

Solar radiation and the earth’s rotation are the primary drivers of large-scale atmospheric motions, while turbulence adds a layer of complexity at small scales. This picture is further complicated by ocean–land interactions, vegetation, anthropocentric forcing, and the hydrological cycle. Read more

RainerKlages Blog Biological Cell Migration

A Novel Model to Simulate Biological Cell Migration

In recent years evidence has accumulated that single biological cells often move in a way that is unlike Brownian motion, a paradigmatic model of random dynamics. Instead, cells migrate faster and exhibit so-called superdiffusion. This article reports on a new method to efficiently simulate superdiffusively moving cells. Read more

Hyejin Blog Post 20180124

Comparison of shortest and fastest routes through cities reveals a structural typology of city development

Much is known about the geometry of road networks within cities, and how these vary with city size and level of economic development. Less is known about how these structures influence the flows of people and activity within cities, and how that activity in turn feeds back to shape road network geometry. Read more

F Metz Blog Article December 2017

New Mathematical Approach to Quantify Eigenvalue Fluctuations in Random Matrices

Since the pioneering work of Wigner in the 50’s, random matrix theory has been playing a crucial role in the understanding of several problems in physics, such as the statistics of nuclear energies, quantum chaos and disordered electronic systems. Read more

Stochastic Chaos in a Turbulent Swirling Flow YSATO

Stochastic Chaos in a Turbulent Swirling Flow

LML External Fellow Yuzuru Sato has recently reported the experimental evidence of the existence of stochastic chaos in a turbulent swirling flow.  Together with co-authors (D. Faranda, B. Saint-Michel, C. Wiertel, V. Padilla, B. Dubrulle, and F. Daviaud), he shows that the experimental attractor can be modeled by a random strange attractor in stochastic Duffing equations. The article is published in Physical Review Letters: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.014502 Read more

observable

A recipe for irreproducibility

During the 2016 LML summer school, Max and I ended up discussing the irreproducibility crisis in science, and that led to a draft manuscript, published today on the arXiv:1706.07773, see also this earlier blog post. Over the last few years several (apparently reproducible!) studies have come out that confirm the crisis. For instance, a survey of scientists, conducted by Nature, found that 70% of respondents had at some point tried but failed to reproduce a published result.

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