in this report, experimental investigation of waste water treatment by reverse osmosis to enable its reuse in cooling tower is presented. a polyamide spiral wound ro membrane followed by three filters as ro pretreatment (two activated carbon and one cartridge filter) and samples of tehran refinery treated waste water have been used. the effect of operating conditions such as pressure difference...

[With 32 Figs. & 4 Tables] I. In tro d u c tio n ........................................................................................................................ 216 II . R ev iew of l i t e r a t u r e ...............................................................................................................216 II I . M a te ria l, m e th o d s and t e c h n i q u e ..................

1. Summer drought stress is considered the primary constraint to plant performance in Mediterranean ecosystems. However, little is known about the implications of summer stress for plant reproduction under real field conditions and, particularly, for the regulatory mechanisms of maternal investment in reproduction. 2. The relationship between plant physiological status at different reproductive...

In Bra z i l , v i s c e ral leishmaniasis poses a serious endemic and epidemic pro b l e m . In re c e n t years the disease has spread to seve ral St a t e s that had not previously re p o rted any human or animal cases. For canine surve y s , the Mi ni s t ry of Health currently recommends use of the indirect immunofluorescence assay (IIF), with a sensitivity of 90-100% and specificity of 8 ...

We introduce modeling and simulation of the noise properties associated with types modal oscillations induced by scaling asymmetric gain suppression (AGS) in multimode semiconductor lasers. The study is based on numerical integration a system rate equations 21-oscillating modes taking account self- cross-modal mechanisms. AGS varied terms pre-defined parameter, which controlled linewidth enhanc...

This paper presents a novel pre-image attack on SHA-3 candidate Spectral Hash (shash), which was until now thought to be resistant to pre-image attacks. PTX (Permute Transform XOR) functions are an idealisation of shash [1] in which its pseudorandom functions have been replaced with random oracles. We extend our previous practical collision attacks on PTX functions to practical pre-image attack...

The major goal of this study is the evaluation of the source rock of Ogaden Basin using Rock-Eval Pyrolysis, Vitrinite reflectance (%Ro), and well log data of the Permo-Triassic and the Mesozoic sequences including Karro, Hamanlei, and Urandab Formations. Burial history and level of thermal maturity of the Bodle-1 well, the Calub-1 well and the Hilala-2 well were modeled based on the calibratio...

Multiple Effect Distillation (MED) is generally considered to be the desalination technology most suited to integration with concentrating solar thermal collectors on a medium to large scale. However the cost and energy requirement of Reverse Osmosis (RO) have fallen significantly in recent years, so that solar thermal powered RO deserves consideration. We compare commercial desalination proces...