Interest in the presence and nature of trend arises frequently in science, public health, technology, and many other areas. In this ar- ticle we discuss the notion of trend in the context of recurrent event processes. We discuss different frameworks within which one can inves- tigate trend and consider various ways in which trends may be manifest. Tests for trend are discussed in detail and t...

Event isotropy $\mathcal{I}^\text{sph}$, an event shape observable that measures the distance of a final state from spherically symmetric state, is designed for new physics signals are far QCD-like. Using technique producing wide variety can range near-spherical to jetty, we compare other observables. We show thrust $T$ and $C$ parameter (and $\lambda_\text{max}$, largest eigenvalue sphericity ...