Mixed- effects varying- coefficient model with skewed distribution coupled with cause-specific varying- coefficient hazard model with random- effects for longitudinal-competing risks data analysis. Analysis of data from these experiments indicates that increased concentrations of calcium and magnesium in wastewater discharged to waste disposal ponds at the INEL increases the availability of strontium for transport beneath the ponds by decreasing strontium sorption to the surficial sediment. The effect of these cation concentrations on strontium sorption was quantified using multivariate least-squares regression techniques. The concentration of sorbed strontium and the percentage of strontium retained by the sediment were correlated to aqueous concentrations of strontium, calcium, and magnesium. Strontium linear sorption isotherm K(d)'s ranged from 12?1 to 85?3 ml/g, increasing as the concentration of calcium and magnesium decreased. Batch experimental techniques were used to determine strontium linear sorption isotherms and distribution coefficients (K(d)'s) using simulated wastewater solutions prepared at pH 8.0?0.1 with variable concentrations of calcium and magnesium. Geological Survey and Idaho State University, in cooperation with the U.S. The investigation was conducted by the U.S. The effects of calcium and magnesium on the distribution of strontium between a surficial sediment and simulated wastewater solutions were measured as part of an investigation to determine strontium transport properties of surficial sediment at the Idaho National Engineering Laboratory (INEL), Idaho.
The distribution coefficients of all other trivalent rare earth ions can be estimated by applying the correlation towards the ionic radii.Įffects of calcium and magnesium on strontium distribution coefficientsīunde, R.L. With the Burton-Prim-Slichter theory, the equilibrium distribution coefficients can be calculated.
The effective distribution coefficients for Nd(exp 3+), Sm(exp 3+) and Er(sup 3+) as dopants are determined experimentally as a function of the crystal growth velocity. Sample data were generated on the basis of the common factor model and…ĭistribution coefficients of rare earth ions in cubic zirconium dioxideĬubic zirconium dioxide crystals are grown with the skull melting technique. The effects of sample size, number of variables, and population value of the congruence coefficient on the sampling distribution of the congruence coefficient were examined. This study developed and investigated an empirical sampling distribution of the congruence coefficient. I appreciate your efforts and apologize for any inconvenience.An Investigation of the Sampling Distribution of the Congruence Coefficient.ĮRIC Educational Resources Information Centerīroadbooks, Wendy J. An informed citizenry is a fundamental requirement for our democracy to work. Thank you for your interest in reading the law. You have been temporarily denied permission to access this document at this time due to the mislocation or other obfuscation of the item in question.
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#Manico multiscala o normale code
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