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Al Khubar, Saudi Arabia

Prince Mohammad bin Fahd University is abbreviated by PMU, is a private university in Dhahran, Saudi Arabia. It was founded by Prince Muhammad bin Fahd, former governor of the Eastern Province.The University was inaugurated in April 2006 and was formally opened in 8 October 2008 with bachelor's degrees in 17 academic programs with some courses taught in Arabic . It is composed of three colleges: College of Engineering - Civil and Mechanical for males, and Interior Design for females), College of Business and College of Information Technology . Additionally, it offers an Executive EMBA program in conjunction with Maastricht School of Management, As of this date, the affiliation with Maastricht has been terminated by Maastricht.All university buildings were planned for completion in 2008, and the school planned to have a total enrollment of 5,500 by 2012. The university plant was not complete as of the summer of 2009. All administration buildings are on the men's campus and are generally off-limits to the women- faculty, staff and students. There is a small library. The men's side of the library is twice the size of the women's. The design is putatively based on the American model for academic programs and administrative organization, and was developed in conjunction with the non-profit Texas International Education Consortium which organizes experts from the 32 public universities in Texas. Wikipedia.

Krishnan S.,Prince Mohammad Bin Fahd University
Tribology Transactions | Year: 2015

Spacecraft high-speed rotating systems use ball bearings, which must work for many years under limited supply of lubricant. These bearings use a cotton–phenolic composite as the retainer material because of its superior tribological properties. The retainers are made by a series of manufacturing processes that impart the required quality to the retainer. A chemical treatment is performed to make the retainer clean and improve oil absorption. The acid etching done as part of the chemical treatment has some detrimental effect on the structural integrity of the material. This article presents various postmachining processes carried out on the retainers and their effects on the quality and performance of the retainers. A series of experiments is carried out to optimize the duration of acid etching and its effects on mechanical and tribological properties of the retainer material. The results show that a 15-s etching is sufficient to burn the cotton fibers without causing any damage to the structure. The study also proves that long soaking in oil improves the oil retention of the retainer rather than improving the surface porosity by long-duration acid etching. A short-term performance test of a 15-s etched retainer is done in spacecraft bearings at various operating conditions and the results confirm its stability in spacecraft environments. © 2015, Copyright © Society of Tribologists and Lubrication Engineers. Source

Benaoum H.B.,Prince Mohammad Bin Fahd University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

Motivated by recent measurements which strongly support a nonzero reactor mixing angle θ13, we study a deviation from S3 neutrino discrete symmetry by explicitly breaking the neutrino mass matrix with a general retrocirculant matrix. We show that nonzero θ13 and nonzero CP violation parameter JCP arise due to the difference between y2 and y3. We demonstrate that it is possible to obtain the experimentally favored results for neutrino masses and mixing angles from this mass matrix. Furthermore, we estimate the effective masses m β and mββ and total neutrino mass Σ|mi| predicted by this mass matrix. © 2013 American Physical Society. Source

Ismael M.A.,University of Basrah | Chamkha A.J.,Prince Mohammad Bin Fahd University
Numerical Heat Transfer; Part A: Applications | Year: 2015

Mixed convection heat transfer and fluid flow fields inside a lid-driven trapezoidal cavity were studied numerically. The cavity horizontal walls were thermally insulated while the inclined side walls were maintained isothermally at different temperatures. Forced convection was induced by moving the hotter right inclined side wall. The problem is formulated using the stream function-vorticity procedure. Together with the established boundary conditions on the right moving wall, the problem is solved by the finite difference method. The Richardson number Ri (0.01-10) and inclination angle of the side walls Φ (66-80°) were considered as pertinent parameters and investigated in two lid-driven cases: aiding and opposing directions. The results show that the behavior of Nusselt number is different from Richardson number depending on the direction of the lid. The inclination angle of the side walls was found to have a significant effect on Nusselt number when Ri was relatively low (≤1); otherwise, a negligible effect of Φ on Nusselt number was recorded. Copyright © 2015 Taylor & Francis Group, LLC. Source

Ashraf M.W.,Prince Mohammad Bin Fahd University
The Scientific World Journal | Year: 2012

The levels of selected heavy metals in popular cigarette brands sold and/or produced in Saudi Arabia were determined by graphite furnace-atomic absorption spectrometry (GFAAS). Average concentrations of Cadmium and Lead in different cigarette brands were 1.81 and 2.46gg-1 (dry weight), respectively. The results obtained in this study estimate the average quantity of Cd inhaled from smoking one packet of 20 cigarettes to be in the range of 0.220.78g. Results suggest that the quantity of Pb inhaled of smoking one packet of 20 cigarettes is estimated to be 0.972.64g. The concentrations of Cd and Pb in cigarettes were significantly different between cigarette brands tested. The results of the present study were compared with those of other regional and international studies. © 2012 Muhammad Waqar Ashraf. Source

Benaoum H.B.,Prince Mohammad Bin Fahd University
Advances in High Energy Physics | Year: 2012

Modified Chaplygin gas as an exotic fluid has been introduced by H. B. Benaoum (2002). Essential features of the modified Chaplygin gas as a cosmological model are discussed. Observational constraints on the parameters of the model have been included. The relationship between the modified Chaplygin gas and a homogeneous minimally coupled scalar field is reevaluated by constructing its self-interacting potential. In addition, we study the role of the tachyonic field in the modified Chaplygin gas cosmological model and the mapping between scalar field and tachyonic field is also considered. © 2012 H. B. Benaoum. Source

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