In this opinion article, we briefly summarize some of the background materials and recent developments in field temporal spatiotemporal media provide our on potential challenges, opportunities, open research questions for manipulation fields waves four dimensions.

We present a self-consistent and versatile forward modelling software package that can produce time series pixel-level simulations of time-varying strongly lensed systems. The dimension, which needs to take into account different physical mechanisms for variability such as microlensing, has been missing from existing approaches it is direct relevance delay, consequently H0, measurements caustic...

A direct adaptive control framework for a class of nonlinear matrix second-order systems with time-varying and sign-indefinite damping and stiffness operators is developed. The proposed framework guarantees global asymptotic stability of the closed-loop system states associated with the plant dynamics without requiring any knowledge of the system nonlinearities other than the assumption that th...