Weakly Coupled Dynamic Programs, Fluid Limits, and COVID-19: How Optimization Can Help Inform Policymaking

Huikang Liu and Wolfram Wiesemann summarize recent work developing a model-based national patient prioritization scheme in response to the limited capacity in the UK due to the continued COVID-19 pandemic. Their approach leverages dynamic programming to simultaneously estimate capacity and account for the dynamics of patient states and available resources.

The Many Behaviours of a Fourth Order Thin-film Equation

Michael C. Dallaston from the Queensland University of Technology discusses the variety of solution behaviors found in a fourth-order thin film equation that serves as a somewhat prototypical equation for a collection of nonlinear phenomena.

Preserving the History of Applied Mathematics

John Boyd reflects on some mathematical figures and their stories, and calls for more preservation of applied mathematical history.

Minimizing the Length — and the Algebra

Mark Levi provides an interesting mechanical solution to a common elementary calculus problem.

Addressing Climate Change, Boosting Environmental Resilience, and Advancing Clean Energy

Alejandro Aceves, Hans Kaper, and Sven Leyffer reflect on the recent findings and recommendations of the SIAM Climate Task Force.

Delayed Hopf Bifurcations in ODEs and Reaction-Diffusion PDEs

Theo Vo of Monash University talks about delayed Hopf bifurcations, and explains their appearance in ordinary and partial differential equations.

A Novel Method for Computing Spectral Stability of Standing Waves

Jonathan Jaquette of Boston University discusses numerical methods useful in establishing the stability and instability of nonlinear waves using conjugate points and the Maslov index.

Vale Claudia Wulff

It is with great regret that we report on the recent passing of Dr Claudia Wulff.

DS21 Red Sock Awards

List of 2021 Red Sock awards.

May 2021 Prize Spotlight

Congratulations to J. D. Crawford Prize winner Igor Mezić and Jürgen Moser Lecture prize winner Lai-Sang Young!