A Three-Dimensional Spatial Non-Linear Predictor for Television

This paper presents a three-dimensional non-linear prediction technique for use in differential pulse code modulation systems used to encode television signals. The prediction is a weighted sum of three estimates called representatives. Each representative is a nonlinear estimate based on previous pels in one of three planes containing the pel to be predicted. The paper contains an explanation of the technique, results of computer simulations of the algorithm and a comparison of the algorithm with other prediction procedures. The predictor is relatively insensitive to image statistics. Errors in the predictor input decay out with time.     

Radiation stability of vitrified radioactive preparations

Data are cited on the effect of ionizing radiations on the chemical stability of vitreous materials intended for radioactive waste disposal. It is shown that exposure in air leads to a change in the chemical composition of the surface of specimens as a result of heterogeneous radiation-chemical reactions involving the solid preparations and components of the air. Suggested reaction products are carbonates, hydroxides, and nitrates.Translated from Atomnaya Énergiya, Vol. 18, No. 4, pp. 361–367, April, 1965