Detalle de: The measurement of $\alpha_s$ from event shapes with the DELPHI detector at the highest LEP energies

Hadronic event shape distributions are determined from data in e + e- collisions between 183 and 207 GeV. From these the strong coupling $\alpha_s$ is extracted in ${\cal{O}}(\alpha_s^2)$, NLLA and matched ${\cal{O}}(\alpha_s^2)$ + NLLA theory. Hadronisation corrections evaluated with fragmentation model generators as well as an analytical power ansatz are applied. Comparing these measurements to those obtained at and around MZ allows a combined measurement of $\alpha_s$ from all DELPHI data and a test of the energy dependence of the strong coupling.