Domestic Wastewater Treatment Plant (DWWTP) type 1 and DWWTP 2 were being evaluated. is located in Sembir area while Tambakrejo which are both Sleman Regency, Special Region of Yogyakarta (Daerah Istimewa or DIY), Indonesia. The emphasis this research to choose the manhole material has least leakage soil, influent discharge performance wastewater treatment quality effluent. method used measure ...

The PI index is a graph invariant defined as the summation of the sums of edges of neu and nev over all the edges of connected graph G, where neu is the number of edges of G lying closer to u than to v and nev is the number of edges of G lying closer to v than to u. The index is very simple to calculate and has disseminating power similar to that of the Wiener and the Szeged indices. The compre...

The study evaluated eight heavy metals content and soil pollution from agricultural soils in northern China. Multivariate and geostatistical analysis approaches were used to determine the anthropogenic and natural contribution of soil heavy metal concentrations. Single pollution index and integrated pollution index could be used to evaluate soil heavy metal risk. The results show that the first...

The Padmakar–Ivan index of a graph G is the sum over all edges uv of G of number of edges which are not equidistant from u and v. In this work, an exact expression for the PI index of the Cartesian product of bipartite graphs is computed. Using this formula, the PI indices of C4 nanotubes and nanotori are computed. c © 2007 Elsevier Ltd. All rights reserved.

Abstract The permanganate index (PI), oil and grease (O&G), 17 polycyclic aromatic hydrocarbons (PAHs) were analyzed in surface sediment water samples collected at 13 sites along the western coast of Suez Bay (SB). PI O&G SB coastal seawater ranged from 9.6 mg O 2 l −1 17.0 to 16.0 37.0 , respectively. level (PAH) offshore area was determined by gas chromatography/flame ionization detec...

Abstract The present study focused on evaluating the groundwater hydrogeochemical of shallow aquifers in semi-arid areas northern Ethiopia, using geospatial modelling and multivariate statistical techniques. Physico-chemical parameters, including pH, major ions, electrical conductivity (EC), total dissolved solids (TDS), hardness (TH), pollution index (PI) other from 22 samples have been used t...

Two equal-length strings S and S′ are a parameterized-match (p-match) iff there exists a one-toone function that renames the characters in S to those in S′. Let P be a collection of d patterns of total length n characters that are chosen from an alphabet Σ of cardinality σ. The task is to index P such that we can support the following operations: search(T ): given a text T , report all occurren...

although water and land pollution are very dangerous, air pollution has its own peculiarities due to its transboundary dispersion of pollutants over the entire world. in any well planned urban set up, industrial pollution takes a back seat and vehicular emissions take precedence as the major cause of urban air pollution. in the present study, air pollution tolerance index was calculated for var...

The Sadhana index (Sd) is a newly introduced cyclic index. Efficient formulae for calculating the Sd (Sadhana) index of linear phenylenes are given and a simple relation is established between the Sd index of phenylenes and of the corresponding hexagonal sequences.