Engineering is all about choosing the best compromise—both for a SPICE model that provides reasonable fidelity and for the tools enabling that model to be employed. A variety of linear models are ...

In its original form, Gibbs-Boltzmann statistical mechanics cannot describe “active matter,” such as living, driven, or self-propelled systems. Contemporary models of swarming and flocking behaviors, ...

There is considerable inherent error in equations for predicting width in gravel-bed rivers, and the relationship between width and bed load transport is poorly ...