Filippo G. Aloi, C.F. Tomasini, Department of Dermatology, University of Turin, Via Cherasco 23, I-10126 Turin (Italy) Sir, We have read with great interest the letter by Requena et al. about our paper ‘Hair Shafts in Epidermoid Cysts’ [1] and agree with them that there are many difficulties in making a histologic differential diagnosis between milia and comedones. In all our cases, the histori...

Abstract The Collaborative Research Center 1153 is investigating an innovative process chain for the production of hybrid components. workpieces are first joined and then formed by cross-wedge rolling. Pinion shafts were manufactured to investigate behavior joining zone under increased complexity forming process. For this purpose, six types produced three processes into pinion shafts. reference...

In this paper, an analytical solution for computing the plastic & linear plastic stresses and critical angular velocity in a FGM hollow & solid rotating disk is developed. It has been assumed that the modulus of elasticity and yield strength were varying through thickness of the FGM material according to a power law relationship. The Poisson's ratio were considered constant throughout the thick...

Cohen, D., and R. G. Wanner (Division of Safety, NIH, Bethesda, MD 20205). The case of the intoxicated cells—an epldemlologic note. Am J Epidemiol 1981;113:250-3. An episode is described In which tissue culture In a laboratory could have become Intoxicated due to the reclrculation of toxic exhaust fumes extruded from the roof of a research Institution. A route of entry was found whereby a porti...

This study deals with the optimisation of hybrid composite drive shafts operating at subcritical or supercritical speeds, using a genetic algorithm. A formulation for the flexural vibrations of a composite drive shaft mounted on viscoelastic supports including shear effects is developed. In particular, an analytic stability criterion is developed to ensure the integrity of the system in the sup...

Distributions of bending stiffness along the spans of laminated composite shafts are determined via a non-destructive evaluation approach. The finite element method formulated on the assumption of uniform bending stiffness within each element is used in the deflection analysis of the shafts. Differences between measured and theoretically predicted deflections at any two points on a shaft are us...