The term pseudotumour of the orbit is unfortunate, since it merely purports to describe a negative quality of a considerable number of diverse pathological conditions. Among ophthalmologists it is common practice to limit the term to those lesions which are of an idiopathic inflammatory nature (Blodi and Gass, 1967), whereas Birch-Hirschfeld, who introduced the term, included all non-neoplastic...

For a (connected) smooth projective curve C over the rational numbers Q, it is known that the rational points CpQq depends on the genus g “ gpCq of C: (1) If g “ 0, then the local-global principle holds for C, i.e.: CpQq ‰ H if and only if CpQpq ‰ H for all primes p ď 8 (we understand Qp “ R when p “ 8). In other words, C is globally solvable if and only if it is locally solvable everywhere. An...

ASTRONOMY AND ASTROPHYSICS First evidence of the nite horizontal extent of the optical turbulence layers. Implications for the new adaptive optics techniques. Abstract. It was recently shown (Masciadri et al. 2000, Masciadri 2001a), using a numerical simulation (Meso-Nh model), that the hypothesis of considering horizontally uniform C 2 N can have severe consequences. For example, the integrati...

Precise measurement of a stress-free reference lattice parameter is vital in the determination of residual stress by diffraction techniques using /2-based analyses. For the evaluation of the residual strain profile in fusion-welded material, it is particularly important to correct the measured strain point-by-point by a stress-free reference for each spatial location across the weld. This is ...