Pentaerythritol tetranitrate (PETN) is a sensitive and brisant explosive. PETN transported wetted (25 %) with water to limit its impact friction sensitivities. Literature on sensitivities in function of content controversial as the measurements were performed by several operators laboratories rendering difficult compare values. studies mechanical sensitivity methods show weaknesses problems mea...

Emergent constraints (ECs) relate observables of the climate system to equivalent quantities simulated from Earth models that are related properties future climate. The uncertainties in projections these may be reduced by constraining modeled observables. article examines how such relationships emerge models, simple theories for ECs can derived temporal variability system, and might misinterpre...