A method of fabricating a semiconductor structure including the steps of:. This top spin valve has a composite CoFeNiFe free layer that is formed on a composite RuCu buffer layer which provides lattice-matching to the free layer as well as enhanced specular reflection. Each guide assembly consists of four mutually orthogonal rollers defining a central, rope-accepting opening in the middle thereof. The method comprises administering to said subject a steroid sulphatase inhibiting amount of a ring system compound; which ring system compound comprises a ring to which is attached sulphamate group of the formula . When coding a B picture, a picture that is timewise closest to the target picture is used as a candidate picture for forward reference, and an I or P picture that is timewise closest to the target picture is used as a candidate picture for backward reference. 26L but adapted to 16-bit arithmetic by shifts after matrix multiplications and integer approximation matrices absorbing scaling factors.