Abstracts of Papers by Bell System Authors Published in Other Journals (01 November 1976)

compared with experimental results for uniformly bulk doped and diffusion doped material. For strongly extrinsic n type material, a large solubility enhancement (about 103 times the intrinsic solubility) is calculated, due to ion pairing of the substitutional metal acceptor with donors. The saturation metal solubilities observed in bulk samples and diffused layers are in substantial agreement (within a factor of ~ 2 ) with calculations for all temperatures and doping levels. 

Melting Point Depression and Kinetic Effects of Cooling on Crystallization in Poly(Vinylidene Fluoride)--Poly(Methyl Methacrylate) Mixtures. T. Nishi* and T. T. Wang, Macromolecules, 8 (November 1975), pp. 909-915. Melting point depression has been observed in mixtures of poly(vinylidene fluoride) and poly(methyl methacrylate). The phenomenon is ascribed to thermodynamic mixing of two compatible polymers. An appropriate expression is derived from which the interaction parameter for the polymer pair was found to be --0.295 at 160°C. * Bridgestone Tire Co., Ltd., Tokyo, Japan. 

Probability of Static Fatigue Failure In Optical Fibers. D. Kalish and B. K. Tariyal, Appl. Phys. Lett., 28 (June 15, 1976), pp. 721-723. An expression for the probability of static fatigue failure in glass is developed based upon a Weibull-type cumulative strength distribution and a fracture mechanics slow crack growth law. Good agreement between the model and experimental results is demonstrated. Examples for using this model as a predictive tool are presented.