We address the problem of interactive feature construction and denoising of binary data. To this end, we develop a variational ICA method, employing a multivariate Bernoulli likelihood and independent Beta source densities. We relate this to other binary data models, demonstrating its advantages in two application domains.

A class of binary trees is described for maintaining ordered sets of data . Random insert ions , delet ions , and retrievals of keys can be done in t ime proport ional to log N where N is the cardinal i ty of the data-set . Symmetric B-trees are a modificat ion of B-trees described previously by Bayer and McCreight . This class of trees properly contains the balanced trees . * This work was par...

Discharge of heavy metals into aquatic ecosystems has become a matter of concern over the last few decades. The search for new technologies involving the removal of toxic metals from wastewaters has directed the attention to biosorption, based on metal binding capacities of various biological materials. Degree of sorbent affinity for the sorbate determines its distribution between the solid and...

Facilitated transport through polymer inclusion membranes (PIMs) is a promising method for simultaneous separation and removal of valuable and toxic metal ions from aqueous solutions. Recently, ionic liquids (ILs) have been used as extracting agents for metal ions due to their unique physicochemical properties. This paper presents research on the facilitated transport of cadmium(II) and copper(...

-Ion-exchange experiments in expanding clay minerals conducted over a wide range of surface ionic compositions and ionic strength produce variable mass-action selectivity coefficients. When the exchanging ions are of unequal charge, tactoid structure appears to influence selectivity, although configurational entropy of adsorbed ions may also generate variable selectivity. The degree of deviatio...

In the present study radioactive tracer isotopes I and Br are applied to study the kinetics of iodide and bromide ion-isotopic exchange reactions in two anion exchange resins Duolite A-378 and Duolite A-143. The study is performed by varying the experimental parameters like temperature and concentration of exchanging medium to understand the effect of above parameters on exchange reaction rate ...

A simple and rapid method has been developed for solvent extraction and spectrophotometric determination of copper (II) using o-methylphenyl thiourea (OMPT) as a sensitive reagent. The basis of proposed method is formation of copper (II)-OMPT complex. Copper (II) was extracted with 0.020 mol L-1 OMPT in chloroform from aqueous solution in 0.075 mol L-1 potassium iodate. The absorbance of comple...

Note that k must always equal i+ 1 in a binary tree. Prodinger [P] recently computed the probability that a random binary tree with n nodes has i nodes with 2 children (and hence i + 1 nodes without children and n − 2i − 1 nodes with 1 child). Since the total number of binary trees with n nodes is known—it is bn—, his formulas can be derived easily from the above theorem and vice versa. Proding...

The self-diffusion coefficient of water in aqueous solutions alkali halides at different concentrations was studied using the polarizable BK3 model [1]. As ion potentials, initially halide force field fitted to this potential by solvation free energy, ion-water clusters as well as, for purpose crosschecking, ambient crystal energy and density investigated. It found that strength attraction betw...