On the solvability of Bellman's functional equations for Markov renewal programming

The functional equations of undiscounted, stationary, infinite horizon Markov renewal programming are shown to possess a solution, by an elementary application of the Leray-Schauder fixed point theorem.     

The anisotropy of conductivity of n-type germanium in strong d.c. fields

The electric conductivity ofn-type germanium at large d.c. field intensities has been measured in three directions of symmetry of the cubic lattice. From these data the repopulation of valleys of the conduction band has been determined. Measurements were done with three materials of different purity. The variation of repopulation between these materials can be explained qualitatively by the influence of Coulomb scattering at ionized impurities. The data are compared with those ofNathan and theoretical data ofFranz andReik et al. The relations of these data to those of the current component perpendicular to the field direction (Sasaki et al.) are also given.     

Eisen, Stahl

Ohne Zusammenfassung     

Titan

Ohne Zusammenfassung     

Eisen

Ohne Zusammenfassung     

The solvent extraction of cobalt(iii) from a trisoxalatocobaltate(iii) solution into chloroform containing acetylacetone

The rate of the extraction of cobalt(III) from aqueous solutions containing trisoxalatocobaltate(lll) into chloroform containing acetylacetone has been investigated. The effects of pH, acetylacetone concentration, oxalate concentration, complex concentration, temperature, and possible change in oxidation state are reported.     

Alkaloide

Ohne Zusammenfassung     

Kobalt

Analytical and Bioanalytical Chemistry -