This work aimed to produce hydrogen (H₂) simultaneously with pollutant removal from biodiesel wastewater by photocatalytic oxidation using a thermally-treated commercial titanium dioxide (TiO₂) photocatalyst at room temperature (~30 °C) and ambient pressure. The effects of the operating conditions, including the catalyst loading level (1-6 g/L), UV light intensity (3.52-6.64 mW/cm²), initial pH...

This paper presents the results of preliminary assessment of water quality along Red Sea coast adjoining Jeddah, Saudi Arabia. Jeddah is a major city with a population of over 2.6 million and an area 1,200 km. To study the impacts, samples of the Red Sea were collected from 24 important locations near Jeddah and analyzed in the laboratory for various water quality parameters. These parameters i...

Advertising is very important for the newsboy problem because the shelf-life of the newsboy product is short and advertisingmay increase sales to avoid overstocking. In this paper, models to study the effect of advertising are developed for the distribution-free newsboy problem where only the mean and variance of the demand are known. As in Khouja and Robbins (2003), it is assumed that the mean...

As a consequence of an increasing share of renewable energies, balancing electricity production and delivery requires efficient electricity markets. At the heart of electricity markets are Information Systems (IS) that coordinate demand and supply in real-time. IS has recently opened up an alternative towards increasing the efficiency of electricity markets by managing demand side resources; i....

The use of [18F]-2-FDG has been increasing in recent years. This agent was originally used for evaluation of CNS glucose uptake and pathologic conditions by positron emission tomography (PET). In view of increasing demand for this agent, its production has been started at cyclotron dept., Nuclear research center for agriculture & Medicine-Karaj Iran (NRCAM). In this paper, [18F]-FDG synth...

Shortage of water resources and increasing demand to consumption of this scarce resource, leads to somenoticeable limitations. On the other hand, population growth and consequently, increasing demand for water in aridand semi arid regions , needs production in exchange of little amount of water consumption. To approach thisobjective, an experiment in the complete randomized blocks carried out i...

This paper examined the efficiency of multivariate linear regression (MLR) and artificial neural network (ANN) models in prediction of two major water quality parameters in a wastewater treatment plant. Biochemical oxygen demand (BOD) and chemical oxygen demand (COD) as well as indirect indicators of organic matters are representative parameters for sewer water quality. Performance of the ANN m...

Some physico-chemical properties and the concentrations of the metals Fe, Mn, Ni, Cd, Cr, Co, Cu, Pb, and Zn in water and sediments were examined from September 2011 to January 2012 in Bodo Creek, where oil spills have been recurrent. Temperature, pH, total dissolved solid, conductivity, salinity, dissolved oxygen, biological oxygen demand (BOD), chemical oxygen demand (COD), total hardness, su...

The demand for increasing speed and low power dissipation triggers numerous research efforts with the increasing demand of wireless portable communication systems in underground mines driven by batteries. Presence of highly flammable gases in underground mines prohibits the use of higher power dissipating electronic systems. Low power wireless portable communication devices can safeguard the li...

In order to investigate the temporal and spatial variations of 14 physical and chemical surface water parameters in the Nhue and Day sub-river systems of Vietnam, surface water samples were taken from 43 sampling sites during the dry and rainy seasons in 2007. The results were statistically examined by Mann-Whitney U-test and hierarchical cluster analysis. The results show that water quality of...