Engineering Journal of Qatar University - [From 1988 TO 2005]: Recent submissions

Now showing items 101-120 of 221

    • Effect Of Sand Blasting On Soda Lime Glass Properties 

      Bousbaa, C.; Madjoubi, M. A.; Hamidouche, Z.; Bouaouadja, N. ( Qatar University , 2003 , Article)
      The present work is based on a simulation in laboratory of the erosion of a soda lime glass caused by sand blasting during sandstorms. It deals with the effects of sand blasting duration (from 0 to 60 min) and impact angle ...

    • Electrical Conductivity Of Aluminum Reinforced Graphite Electrodes 

      Zahran, R. R ( Qatar University , 1993 , Article)
      Composite, disc-like aluminum reinforced graphite electrodes were prepared, and an integrated parametric analysis has been performed to investigate the effect of some processing parameters on the electrical conductivity ...

    • Experimental Investigation Of The Role Of Stabilizers In The Enhancement Of Automatic Voltage Regulators Performance 

      Saleh, K. I. ( Qatar University , 1991 , Article)
      In electrical power systems, dynamic stability problems may be solved through the application of power system stabilizers (PSS), which improve the performance of the main automatic voltage regulators (AVR's) of the synchronous ...

    • Energy Study of A Gas-Fired Turbo-Generator 

      Okelah, M.R.S. ( Qatar University , 1988 , Article)
      As far as energy utilization is concerned, the performance of a gas turbine-generator combination, depends on some key factors among which are; engine features, methods of utilizing heat energy associated with exhaust ...

    • Paraboloid Shell As Footing 

      Al Ansari, Mohammed S. ( Qatar University , 1999 , Article)
      A simplified method for the design of paraboloid shell footing base on the displacement of the shell's crown where the column axial load is transferred to the footing has been developed. A case study was presented to ...

    • Comparing different methods for prediction of liquefied natural gas Densities 

      Nasrifar, Kh.; Javanmardi, J.; Moshfeghian, M. ( Qatar University , 2005 , Article)
      The densities of several liquefied natural gas (LNG) mixtures and pure methane using different equations of state and correlations have been predicted and compared with the experimental values. The equations of state were ...

    • Some Misconceptions About Plastic Degradation 

      Raouf, Mohamed Imad N. Raouf ( Qatar University , 1999 , Article)
      In consistence with the importance of implementing best utilization of human resources towards maintaining suitable healthy environment for our next generations, concepts and fundamentals upon which most researches on ...

    • Performance Analysis Of Coded Sfh-Ssma Communication Systems Over Mui Channel With No Side Information 

      El Jaafreh, Yousef G.; Qaraque, Khalid A. ( Qatar University , 2003 , Article)
      This paper presents the performance analysis of a Slow Frequency Hopped Spread Spectrum Multiple Access (SFH-SSMA) communication system under conditions of Multiple Users Interference (MUI) over a communication channel ...

    • Causes For Delays In Construction Projects In Kuwait 

      Al Tabtabai, Hashem M. ( Qatar University , 2002 , Article)
      The paper presents a study based on a research that analyzes and ranks the causes of delays in building and housing type projects undertaken by governmental agencies in Kuwait. The study was based on a survey with the ...

    • A Model For A Narrow-Cut Fractionating Column 

      Farag, Hassan A.; Ali, Ezzat A. ( Qatar University , 1997 , Article)
      A mathematical model was developed to simulate the operation of a narrow-cut fractionating column. The model can calculate boiling point and dew point on the feed plate, the number of liquid and vapour moles, the enthalpy ...

    • Viscosity Of Hydrocarbon Liquids Saturated With Gas 

      Al Harbi, Dulaihan K. ( Qatar University , 1995 , Article)
      Experimentally measured kinematic viscosities are reported for benzene, cyclohexane and n-heptane saturated with hydrogen, nitrogen and carbon dioxide. A Zeitfuchs cross-arm viscometer suspended in a unique design ...

    • Stability Of Square Interval Matrices For Discrete Time Systems 

      Rousa, Nabil S. ( Qatar University , 2001 , Article)
      New sufficient conditions for the Schur stability of interval matrices are provided. Moreover, a time saving version of a necessary and sufficient condition for the Schur stability of a class of interval matrices is ...

    • On Loss Probabilities for Delayed - Access Circuit - Switched Multiplexers 

      El Hadidi, M. T. ( Qatar University , 1989 , Article)
      Multiplexing schemes for packetized circuit-switched sources are characterized by an avoidable accessing delay. In the present work it is shown that, contrary to conventional immediate-access multiplexing schemes, one can ...

    • Onset of Convection in a Liquid Film Flowing 

      Hassab, M. A. ( Qatar University , 1990 , Article)
      The thermal instability of a vicsious liquid film flowing down an inclined plane heated from below is studied analytically. The effects of Biot number at the free surface, the inclination, the Prandtl number and the Reynolds ...

    • Preliminary Design Of Reinforced Concrete Beams Using Neural Networks 

      Senouci, Ahmed B. ( Qatar University , 2000 , Article)
      This paper presents a backpropagation neural network model for the preliminary design of rectangular concrete beams. The model, which is developed based on the strength design procedure of the American Concrete Institute ...

    • Solar Water Pumping — An Analytical Overview 

      Kamal, W. A. ( Qatar University , 1988 , Article)
      Two basic thermodynamic conversion techniques of solar water pumping are recognized. In the first technique, a high internal energy fluid heated in a solar collector is used to power a conventional heat engine which drives ...

    • Application Of Neural Generated Error Signal In Classification And Compression Of Ecg Beats 

      Abu Zitar, Raed ( Qatar University , 2002 , Article)
      This paper presents a neural network architecture connected in cascade for ECG Holter system beat classification and compression. The system works in real time, on line, and is capable of recognizing and compressing up to ...

    • Effects of acid smut production on Design of industrial chimneys 

      Shahin, M. M ( Qatar University , 1990 , Article)
      Atmospheric, mechanical and chemical kinds of attacks on industrial chimneys constructed of brickwork, concrete and steel are discussed. Acid smut production in chimneys is described. Two of the factors, widely regarded ...

    • Optimum Cutting Schedule Of Reinforcing Steel Bars 

      Senouci, Ahmed B.; El-Bahrawy, Aly N. ( Qatar University , 1999 , Article)
      Reinforcing steel bars are generally procured in standard lengths. The cutting of standard steel bars to the specified lengths usually yields an appreciable amount of steel waste. Minimization of steel waste problem is of ...

    • Correlation Of Vapor-Liquid Equilibrium Data For Binary Mixtures Containing One Polar Component By The Parameters From Group Contributions Equation Of State 

      Moshfeghian, M.; Maddox, R. N. ( Qatar University , 1993 , Article)
      Use of a quadratic mixing rule in the Parameters from Group Contributions Equation of State increases the range of compounds for which vapor-liquid equilibrium behavior can be satisfactorily correlated. This is demonstrated ...