The aim of this study is to assess the usefulness of ceramic filter for treating sand filter backwash water to remove heavy metals and radionuclides under controlled flux. The treated water is recycled inside water treatment plant to reduce the wastage of water sources and enhance the effectiveness of water resources management. Daily, typical backwash water produced from sand filter represents about 7% of raw water and it usually is disposed of because of its contamination due to heavy metals like iron (Fe), manganese (Mn) and radionuclides like radium (Ra). This amount of water is very critical in arid region which already are suffering from scarcity of water resources. The main advantages of using ceramic filter as compared to conventional sand filter is using such an amount of backwash water which consume only 0.7% of raw water which is 10 times less than backwash water produced from sand filter. The proposed treatment process was operated without any chemical addition with continuous filtration using ceramic filter. Under 300-430 L/m 2 h flux, the pilot plant was operated 24 h for 60 days, with 1 min backwash every day. The process was achieved about 98.5%, 91.2% and 99.2% removal efficiency for Fe, Mn and Ra, respectively.  Such technology can decrease backwash water from the conventional water treatment plants and would enhance effectiveness of sustainable water resources management.

The main objective of Saudi Building Code (SBC) is the minimum requirements, and investigating public health and safety through stability of buildings and facilities and the protection of life and property from hazards associated buildings. The quality control systems of concrete are gaining great importance to ensure the successful application of SBC for concrete structures, and it is necessary to be aware of its requirements and to highlight the benefits of it. It was difficult to follow the procedures of code by most of engineers or engineering students because of huge number of charts, tables and equations. This research aims in spreading the culture of design by code utilizing e-learning. This computer-aided design software has to go through uncomplicated steps until reaching the design values of concrete mixture proportions. This software is a first phase begins with designing concrete mixtures, evaluating the test results of hardened concrete and quality control of the implementation of new projects. This research shows the role of Qassim University in serving and developing the community. The Saudi Building Code was first issued in 2007. It consists of 13 main volumes, among which is SBC301 which is the loading and forces requirements. Design of concrete mixtures is a requirement in the Saudi Building Code. It was essential to develop an interactive software with an easy graphical user interface to be brilliant solution to design problem. This software goes through uncomplicated steps until reaching the values of concrete mixture proportions and the evaluation of test results.

This work concentrates on the beneficial effects of Titanium-based ceramic coating on the oxidation behavior of high-speed steels. Two types of high-speed steels with varying concentrations of chromium have been investigated by the gravimetric analysis method. Physical Vapour Deposition (PVD) technique was used to coat TiAlN on the steel specimens, and the isothermal oxidation behavior is studied at temperatures, namely 600 o C, 700 o C, and 800 o C. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses were used to analyze the steel specimens' surface before and after the oxidation process. Rapid oxidation is observed at the initial stages of oxidation, and a decrease in oxidation rate was obtained concerning an increase in oxidation time. When the temperature increases, the oxidation resistance decreases. More important chromium content specimen shows improved oxidation resistance. In comparison, a threefold increase in oxidation resistance was observed with specimen coated with TiAlN.

In this paper, several attempts to utilize dimensional analysis in the study of corona discharge are presented.  Our goal is to determine the dimensionless products pertinent to the study of several corona-related phenomena including (a) corona discharge current, (b) detrimental ozone generation by negative wire-to-plate corona discharge in both dry and humid air, and (c) the small current regime for rod-plane geometry in air. We demonstrate and compare several computational methods to process the dimensional matrix so as to generate the pertinent dimensionless products. Moreover, we contribute a novel explanation (reinforced with ample diverse examples) for the issues of bases, regimes and independent sets of dimensionless products.