the contamination of riverbed sediments by heavy metals has assumedserious problems due to their toxicity and accumulative behavior. the present studyinvestigated the concentrations of heavy metals from the bottom sediments of shitalakhyariver to understand the level of contamination and their distribution. the averageconcentrations of heavy metals al, k, ca, mg, fe, as, cu, co, cr, and zn are ...

in this research, the adsorption destructive process of chlorpyrifos (cp,o,o-diethyl-o-3,5,6-trichloro-2-pyridinyl phosphorothioate) as a noticeable organophosphate pesticide using in agriculture on the nickel tungstate (niwo4) nanoparticles catalyst was investigated and monitored via the 31p nuclear magnetic resonance (31pnmr). the effects of various experimental parameters such as catalyst do...

Table 7. This table contains statistics regarding applying locality optimization to the TSP application running on 6 hosts with false sharing for different k (number of jobs contending for a page). Applying locality optimizations decreases dramatically the number of DSM messages (page lookup and transfer). The added overhead imposed by ping-pong treatment mechanism and increased number of threa...

To implement divisive hierarchical clustering algorithm with K-means and to apply Agglomerative Hierarchical Clustering on the resultant data in data mining where efficient and accurate result. In Hierarchical Clustering by finding the initial k centroids in a fixed manner instead of randomly choosing them. In which k centroids are chosen by dividing the one dimensional data of a particular clu...

The effects on the Schwann cell electrical potential of external ionic concentrations and of K-strophanthoside were investigated. Increasing (K)(o) depolarized the cell. The potential is related to the logarithm of (K)(o) in a quasi-linear fashion. The linear portion of the curve has a slope of 45 mv/ten-fold change in (K)(o). Diminutions of (Na)(o) and (Cl)(o) produced only small variations in...

Let S be a site. We introduce the notion of extension of strictly commutative Picard S-stacks. Applying this notion to 1-motives, we get the notion of extension of 1-motives and we prove the following conjecture of Deligne: if MRZ(k) denotes the integral version of the neutral Tannakian category of mixed realizations over an algebraically closed field k, then the subcategory of MRZ(k) generated...

This paper is concerned with the following second-order nonlinear differential equation: x (2n) (t) + n+1 k=1 f k (x (k–1) (t))x (k) (t) – g(t, x(t)) = e(t). By applying Mawhin's continuation theorem of coincidence degree theory, we establish sufficient conditions for the existence and uniqueness of periodic solutions for the above equation. Some recent results are known as the special cases of...