ABSTRACT: Concrete buried pipes, as a green construction material, has some disadvantages when they are used compared to other flexible, non-green materials such as plastic and steel pipes. To overcome this problem; a compressible inclusion, such as SABIC Polystyrene products, will be used to surround part of the concrete buriedin order to help motivating arch action. This technique shallhelp in increasing the allowable buried depth of concrete pipes hence spreading the use of green materials and assisting in publicizing the culture of green building concept. A numerical simulation of the problem is conducted and the effect of different factorswill be investigated through a parametric study. Factors such as;width of the EPS geofoam layer, thickness of the EPS layer, and the location of the EPS layer are studied utilizing the numerical analysisin order to suggest the ideal solution are presented. The study showed that the concrete pipes are much more durable than any other kind of pipes, they will last you a lifetime and they are not easily damaged as well. Concrete pipes areextremely cheap, environmentally safe and friendly since it is made of all natural local materials, which are also recyclable.The numerical analysis showed that the expanded polystyrene (EPS) geofoam can be utilized in reducing stresses on buried rigid pipesand can be used as a compressible sheet for all types of underground structures against those faces in contact with earth.

ABSTRACT. In the recent years, the Kingdom of Saudi Arabia started some huge projects in the field of infrastructure development through all the Kingdom regions. Reinforced concrete pipes are considered to be a good and economicchoice for sewage pipes since they are less expensive, locally produced, and environmentally safe. The use of reinforced concrete pipes is not limited to the sewage systems, but they are also used in water and oil transfer as well as in storm water drainage systems and utility tunnelsthroughout the Kingdom cities. The current paper aims to identify the trouble zone above buried conduits to be careful during installation pipes or construct buildings on these zones and to investigate how to improve the performance of rigid conduits under heavy overburden soil loads using EPS-Polystyrene around it and compared the geometry of trouble zone above pipe with different diameters of pipes and modulus of elasticity of inclusion. The results of the study show the improvement in the performance of reinforced concrete pipes under high overburden pressure by reducing the vertical stress above buried pipes around 95% when using a thin layer of EPS-geofoam around pipes due to the development of arch action above the pipe. Also, the trouble zone is determined for different diameters of pipes to protect buildings that will be constructed from settlement.

ABSTRACT. This paper provides an overview of engineering academic programs in the currently existing 24 Saudi Arabian public universities, with emphasis on program names. The aim is to suggest a unified naming scheme for Saudi engineering programs in public universities. Recent data regarding engineering program names in Saudi public universities has been compiled, tabulated, and analyzed in order to determine common trends and differences. Data shows that significant differences exist in equivalent program names without an apparent basis for such discrepancies. It is alarming to see that no standard, uniform basis has been used to choose program names in Saudi public engineering colleges. The author proposes a unified naming scheme as a step in merging nationwide efforts in Saudi engineering colleges.

ABSTRACT. Nowadays, Exploitation of the renewal wind energysuch as wind energyfinds increasing interest. Wind-turbines prime movers operate at variable speed. Therefore, it is recommended to use induction generators with such prime movers as it is suitable for such conditions.The present research is aimedat improving the performance of a wind-driven double-fed induction generator (DFIG) system at different wind speeds. A set of two converters in the rotor circuit has been controlled to inject a certain voltage. This voltageenablesthe generator to run at the speed which allows the wind turbine to extract the maximum power from the wind. The research presents a new analytical technique for calculating the injected voltage and power necessary to catch the maximum wind power. The induction generator has been modelled at steady-state conditions using frequency domain equivalent circuit. Computer-programs have been designed to compute the performance characteristics of the DFIG with this basic control strategy and compare it to the uncontrolled generator. The comparison has revealed that the performance of the controlled DFIG is clearly improved.