Limits of safety

Assessing Safety Benefits of Variable Speed Limits

Limits in modified categories of interest

‎We firstly prove the completeness of the category of crossed modules in a modified category of interest‎. ‎Afterwards‎, ‎we define pullback crossed modules and pullback cat objects that are both obtained by pullback diagrams with extra structures on certain arrows‎. ‎These constructions unify many corresponding results for the cases of groups‎, ‎commutative algebras and can also be adapted to ...

Exploring the limits of safety analysis in complex technological systems

From biotechnology to cyber-risks, most extreme technological risks cannot be reliably estimated from historical statistics. Engineers resort to probability safety analysis (PSA), which consists in developing models to simulate accidents, potential scenarios, their severity and frequency. However, even the best safety analysis struggles to account for evolving risks resulting from inter-connect...

Criminology and the 'community Safety' Paradigm: Safety, Power and Success and the Limits of the Local

Safety Control Synthesis with Input Limits: a Hybrid Approach

We introduce a hybrid (discrete–continuous) safety controller which enforces strict state and input constraints on a system—but only acts when necessary, preserving transparent operation of the original system within some safe region of the state space. We define this space using a MinQuadratic Barrier function, which we construct along the equilibrium manifold using the Lyapunov functions whic...