Dissertations from the Instituut-Lorentz: 1981-1990 1982: W. van Saarloos On non-linear hydrodynamic fluctuations 1982: R.H.P. Kleiss Monte Carlo simulation of radiative processes in electron-positron scattering 1983: J.C.J.M. van Reisen Topics in phase-shift analysis and higher spin field theory 1983: E.A. Bergshoeff Conformal invariance in supergravity 1983: B.J.A. Zielinska On some hydrodynamic and optical properties of a fluctuating fluid surface 1983: G.R.W. Quispel Linear integral equations and soliton systems 1983: F.R. Klinkhamer Physics of the early universe: applications of theories of elementary particles to cosmology at very high temperatures 1984: F.W. Nijhoff Separable interactions in liquid 3He 1984: C.W.J. Beenakker On transport properties of concentrated suspensions 1985: W.Th.F. den Hollander Random walks on random lattices 1985: G.J.H. Burgers On the construction of field theories for higher spin massless particles 1985: P.H.W.M. Daverveldt Monte Carlo simulation of two-photon processes 1985: A.J. Weisenborn Drag on a sphere moving slowly along the axis of a rotating viscous fluid 1987: M.M. Wind On the optical properties of rough surfaces and thin films 1987: U. Geigenmueller On electric and magnetic properties of dispersions of spheres 1987: J.H. Sikkenk The effect of external fields on the liquid-vapour interface 1988: P.A. Bobbert On the optical properties of spheres and small spheroids on a substrate 1989: T. Matsuura Higher order corrections to the Drell-Yan process 1989: W.T. Giele Properties and calculations of multi parton processes 1989: W.J.P. Beenakker Electroweak corrections: techniques and applications 1989: G.J.M. Koper On the dynamics of spin glasses: A theory of aging 1990: M.J.P. Nijmeijer Simulation of fluid interfaces