Study of the structure of hadronic events and determination of alpha-s at s**(1/2) = 130-GeV and 136-GeV

We present a study of the structure of hadronic events recorded by the L3 detector at center-of-mass energies of 130 and 136 GeV. The data sample corresponds to an integrated luminosity of 5 pb-’ collected during the high energy run of 1995. The shapes of the event shape distributions and the energy dependence of their mean values are well reproduced by QCD models. From a comparison of the data with resummed (?(a:) QCD calculations, we determine the strong coupling constant to be LY~ ( 133 GeV ) = 0.107 f 0.005 (exp) f 0.006( theor).