water obtained from any source may contain impurities induced by erosion, dissolved minerals, dissolved gases and material produced from organic matter decomposing. if the amount of these substances exceed a certain limit, not only the water would not be potable, but the water containing the material will not be suitable to be used in most applications, or at least before treatment cannot be ap...

Settling behavior of the binary-weighted switched-capacitor digital-to-analog converter output is analyzed and a design method for fast settling is presented. A calibration circuit that effectively reduces settling time beyond the process limit is also proposed and verified with various simulations.

This paper investigates the scheduling problem of minimizing makespan on parallel batch processing machines encountered in different manufacturing environments, such as the burn-in operation in the manufacture of semiconductors and the aging test operation in the manufacture of thin film transistor-liquid crystal displays (TFT-LCDs). Each job is characterized by a processing time, a release tim...

Batch verification is a method to verify multiple signatures at once. There are two issues associated with batch verification. One is the security problem and the other is the computational speed. In 1998, Bellare et al. have proposed an approach called small exponents test, to preserve the security of batch verification of a digital signature algorithm (DSA) variant. In this letter, we propose...

One of the most important issues in water supply for agriculture or drinking is sediment control.Sedimentation in water conveyance channels reduces transmission efficiency. this study evaluated theefficiency of settling basin of Kamandan intake that is located in the village of Aligoodarz in Lorestanprovince. At first sample from water and sediment in inlet and outlet of settling basin in diffe...

Settling-thickening tanks are used to achieve separation of the liquid and solid fractions of faecal sludge (FS). They were fi rst developed for primary wastewater treatment, and for clarifi cation following secondary wastewater treatment, and it is the same mechanism for solids-liquid separation as that employed in septic tanks. Settling-thickening tanks for FS treatment are rectangular tanks,...

We develop an inventory model to determine optimal ordering policy under permissible delay in payment by considering demand rate to be stock dependent. Mathematical models are derived under two different cases: credit period being greater than or equal to cycle time for settling the account, and credit period being less than or equal to cycle time for settling the account. The results are illus...

215 Rabies vaccines for human use currently are tested for potency by a mouse challenge assay. this test was developed by the National Institutes of Health (NIH) and is therefore referred to as the NIH test. Its origins go back to the 1950’s, well before good manufacturing practice (GMP) was established. the NIH test soon was recognized to be highly variable, to consume a large number of animal...

in this research work, the parameters affecting the settling velocity within the thickeners were studied by introducing an equivalent shape factor. several thickener feed samples of different densities including copper, lead and zinc, and coal were prepared. the settling tests were performed on the samples, and the corresponding settling curves were plotted. using the linear regression analysis...

To evaluate the sedimentation of aluminium phosphate [AlPO4] and ferrous [Fe3(PO4)2] precipitates in sodium carboxymethylcellulose (Na-CMC) biopolymer at different temperatures, batch-wise precipitation tests AlPO4 Fe3(PO4)2 solutions Na-CMC were carried out temperatures 30, 40 50oC. The objective was to determine On-set Sedimentation Rate (OSR) Volume Ratio (SVR) metal phosphates. Fixed volume...