تصفح Engineering Journal of Qatar University - [From 1988 TO 2005] حسب العنوان

السجلات المعروضة 135 -- 154 من 221

    • 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 ...

    • The Onset Of Resonance In Two-Immiscible Fluids Inside A Spinning And Coning Cylinder 

      Selmi, M. ( Qatar University , 1993 , Article)
      Resonance of the motion of two fluids inside a cylinder that spins about its axis and rotates (cones) about an axis that passes through its center of mass is known to occur for low-viscosity fluids (high Reynolds number ...

    • Operation And Maintenance Of Sewage Treatment Plant In Doha 

      Shadid, Fawzi T.; Ahmed, Shamim ( Qatar University , 1992 , Article)
      The sewage treatment plant in Doha-South uses primary, secondary and tertiary treatment units for treating predominantly domestic sewage. The treated effluent, is used in irrigating agricultural farms for growing animal ...

    • Optical Matching For Microwave Active Devices 

      Hindy, Moataza A. ( Qatar University , 1997 , Article)
      This paper describes a microstrip optically controlled matching technique between microwave active devices with low impedance (less than 10 ohms) and a conventional 50 or 70 ohm communication system in the upper microwave ...

    • Optimizing Use Of Marshall Asphalt Mix Design 

      Lindly, Jay ( Qatar University , 1997 , Article)
      Rutting has been a problem in Qatar's highway pavements since it began designing asphalt mixtures with the Marshall Method in the early 1990's. This paper describes specifications and rules-of-thumb which have been ...

    • 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 ...

    • Optimum Design Of Concrete Slab Forms 

      Senouci, Ahmed B. ( Qatar University , 1996 , Article)
      This paper presents a design optimization method for concrete slab forms. This procedure was formulated to provide a safe slab form design with minimum cost. The proposed method considers in its design process the cost of ...

    • An Optimum Performance of A Flat-Type Solar Air Heater With A Porous Absorber 

      Hassab, M. A.; Sorour, M. A.; Elewa, F. A. ( Qatar University , 1989 , Article)
      This investigation is concerned with the design and performance of a flat solar air heater in which air flows perpendicular from a vented transparent cover through a porous absorber plate. The design phase involves a ...

    • 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 ...

    • Parallel Computing Applied To Compensate The Effect Of Amplifier Bandwidth In The Design Of Switched Capacitor Networks 

      Makkey, M. Y. ( Qatar University , 1994 , Article)
      A method is described for the extraction of capacitor values for switched capacitor (SC) networks which compensate for the effect of finite amplifier bandwidth in the design of SC networks using optimization. The finite ...

    • Parametric Study On Single Machine Early/Tardy Problem Under Fuzzy Environment 

      Osman, Mohamed S. A.; Saad, Omar M. O.; Abass, Samir A. ( Qatar University , 2002 , Article)
      This paper presents a solution algorithm for solving the single machine early/tardy problem having fuzzy parameters in the constraints. There are several cost structures: job-independent, job-dependent and symmetric, and ...

    • A Parametric Study On Transportation Problem Under Fuzzy Environment 

      Saad, Omar M. [عمر محمد سعد]; Abass, Samir A. ( Qatar University , 2002 , Article)
      This paper presents a solution algorithm for solving the transportation problem having fuzz) parameters in the constraints. A parametric studv is carried out For this problem. Some basic stability notions are defined and ...

    • 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 ...

    • Performance Evaluation of A Class of Adaptive Bifurcated Routing Algorithms 

      Ayad, N. M.; Mohammed, F.A.; Metwally, M.S. ( Qatar University , 1988 , Article)
      With the cost of computation decreasing, packet-switched computer communication networks are becoming increasingly cost effective. In this paper a class of bifurcated routing algorithms is considered. One of the algorithms ...

    • Performance Evaluation Of A Msf Desalination Plant In Qatar 

      Okelah, M.R.S.; Tag, I.A. ( Qatar University , 1992 , Article)
      In this paper, an assessment of the performance of one of the multistage flash (MSF) desalination units operating in conjunction with the gas-turbine cogenera-tion power plant in Qatar is carried out under different operating ...

    • Performance Evaluation Of Biped Robot Optimal Gait Based On Genetic Algorithm 

      Capi, G.; Nasu, Y.; Barolli, L.; Mitobe, K.; Yamano, M.; ... more authors ( Qatar University , 2001 , Article)
      A Genetic Algorithm (GA) gait synthesis method for walking biped robots is considered in this paper. The walking occupy most of the time during the task performance, therefore its gait is analyzed based on the minimum ...

    • Performance Evaluation Of Water Distribution Network Using Computer Model Simulation 

      Ahmed, S; Preston, Stephen ( Qatar University , 1995 , Article)
      The paper describes the water supply system in Doha. It discusses the methodology used in estimating the water demand for each node of the water distribution network in the Garrafa District of Doha. A computer model of the ...

    • Performance Of A Cool Thermal Store Filled With Balls Containing Water 

      Hariri, Abdulrahman Salih ( Qatar University , 2001 , Article)
      A cool thermal storage (CTS) system can be integrated with an A/C system in order to reduce power consumption during a period of high demand. Investigator conducted experiments to investigate the performance of a CTS during ...

    • Performance of Greenhouses in The Arabian Gulf 

      Hassab, M.A.; Tag, I.A. ( Qatar University , 1990 , Article)
      This work is devoted to the gaining of insight into the operation of environmentally controlled greenhouse in hot and humid climates. Field data inside and outside the greenhouse, namely: solar radiation, dry and wet bulb ...

    • Performance Simulation Of Single-Evaporator Domestic Refrigerator Using Alternative Refrigerants 

      Murtadha, T. K.; Hussain, Salam Hadi ( Qatar University , 2003 , Article)
      The search for well-functioning and energy-optimized refrigeration systems has made modeling and simulation of such systems an important tool for the industry in terms of product development. The present study explores how ...