Resolution of Degeneracy in Transportation Problems

In this note a method is given to find an independent cell for allocation of an infinitesimally small amount (?) in a degenerate solution of a transportation problem. The suggested method of locating the independent cell ensures improvement of the solution or recognition of its optimality, thereby avoiding unnecessary iterations that result in shifting of the ? from one independent cell to another.     

Electrothermal atomization atomic absorption spectrometric determination of trace metals in uranium-plutonium fuel materials

Summary Atomic absorption spectrometric methods using the electrothermal mode of atomization developed for the determination of Ag, Be, Ca, Cd, Cr, Co,Cu, Fe, Li, Mn, Na, Ni, Sn and Zn in (U, Pu) solution with 4% plutonium have been described. The carbon rod atomizer has been adapted for glove box operation to enable handling of plutonium containing solution samples. Multielement solution standards with graded concentrations of the analytes and fixed concentration of the matrix are used in the standardization process. Nanogram to sub-nanogram quantities of the analytes have been determined with a precision of better than 9% RSD using 5 l of the sample aliquots.

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Bestimmung von Metallspuren in Uran-Plutonium-Kernbrennstoffen mit Hilfe der ETA-AAS

     

Absorption of water in waste glass as a precursor for foam formation

The objective of this research is to describe the formation of foam glass from waste glass using water as a gasifying agent similar to natural perlite. Artificial perlite with up to 10% water content may be made from waste soda-lime glass by subjecting the glass to water vapor under moderate pressures (less than 250°C). The maximum rate of absorption requires a minimum amount of liquid water to be in contact with the glass. Excess liquid water dilutes the corrosion action of alkali formed. Rate of water absorption as a function of water content and 1N NaOH solution content were examined on rods of glass as well as glass powder. Water adsorption was obtained by heating glass compositions in saturated steam in an autoclave. In general, the absorption of water was related to particle size, liquid water content, hydroxide ion concentration and glass composition.     

The study of the pressure derivative of the bulk moduli in ionic solids

The expression for the pressure derivative of the Szigeti effective bulk modulus (dB¹/dp)for the ionic solids has been derived. The formulated relation has been utilized to evaluate the values of dB¹/dp in case of some alkali halides, which are found to be much different from their normal values obtained by mechanical methods.