Engineering Journal of Qatar University - [From 1988 TO 2005]: المرسلات الحديثة

السجلات المعروضة 21 -- 40 من 221

    • 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 ...

    • Analysis Of The Coupling Gap Between Microstrip Antennas 

      Hindy, Moataza A.; Mitkees, Abdela Aziz A. ( Qatar University , 1997 , Article)
      The accurate and efficient Galerkin's method was developed in the spectral domain for analyzing gap discontinuities in patch antenna array. Using new current distribution the problem is solved using full wave approach ...

    • Three Dimensional Analysis Of Space Imageries 

      Diefallah, M. A. M. ( Qatar University , 1994 , Article)
      Space imageries with their low costs and availability for every one, provide a good opportunity for topographic mapping of unmapped or poorly mapped areas around the world particularly in the developing countries. The ...

    • Qualitative Assessment Of Bottled Water In The Middle East 

      Ahmad, S; Saleem, Abdul ( Qatar University , 1996 , Article)
      Many brands of bottled water are being produced in the Middle East including the Gulf Cooperation Council (GCC) countries. Over fourteen brands of bottled water could be found in the market of Doha. Use of bottled water ...

    • Examination Of An Oil Separator Pressure Vessel (Case History) 

      Kandeil, A. Y. ( Qatar University , 1991 , Article)

    • Simplified Method For Plate Deflection Calculation 

      Al Ansari, Mohammed S. ( Qatar University , 1997 , Article)
      This paper presents a simplified method for the calculation of thin-plate deflections. The method, which deals with uniformly loaded plates, uses the stiffness method to obtain plate deflection equations for specified ...

    • Solidification Of Steel Billets In Continuous Casting 

      Kandeil, A.Y.; Tag, I.A.; Hassab, M.A. ( Qatar University , 1991 , Article)
      For practical operation, it is necessary to know how the solidification of liquid steel progresses i.e. when and where a strand has completely solidified. Decisions on, the casting speed, the spray water flow rates and ...

    • Stability Analysis Of Digital Pd Control Applied To Flexible Systems 

      Fanni, Mohamed; Al-Salem, N. ( Qatar University , 2002 , Article)
      The work shows that the sampling in a digital PD controller of a flexible system may cause instability, while the continuous PD control system is stable. A procedure is introduced to define the stability regions analytically ...

    • 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 ...

    • Contribution Of Horizontal Drilling Technology In The Development Programs Of Saudi Oil Fields 

      Hamada, G. M; Al-Awad, M. N. J.; Al-Blehed, M. S.; Al-Saddique, M. A. ( Qatar University , 2001 , Article)
      The technology of drilling and production of horizontal wells is probably one of the most significant breakthrough in the oil and gas industry of the eighties. The continuous improvement of hardware equipment made horizontal ...

    • Properties Of The Omani Sarooj 

      Hago, Abdel Wahid; Al-Rawas, Amer ( Qatar University , 1997 , Article)
      The fundamental properties of the Omani sarooj have been studied. Sarooj samples were collected from different sites to assess their pozzolanic activity. A laboratory testing program covering chemical and physical ...

    • Reduced Snubber Circuit Elements For Pwm Voltage Source Inverter 

      Saied, Basil M.; Ameen, Yasir M. Y. ( Qatar University , 2002 , Article)
      This paper presents the description and simulation of a new proposed arrangement of RLD/RCD snubber circuit used with pulse width modulated voltage source inverter. The new arrangement allows minimizing the number of active ...

    • A New Three Nodes Shell Element With Transverse Shear 

      Mohamed, Guenfoud ( Qatar University , 2000 , Article)
      This paper proposes a new three node curved shell element. The approach used in the development of the new element is based on the Marguerre shallow shell theory which incorporates the effects of initial curvature (out-of ...

    • 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 ...

    • Economic Analysis of Corrosion Control In Petroleum Refineries 

      Salem, A. B. ( Qatar University , 1988 , Article)
      Economic analysis of corrosion problems and their prevention or control was found to gain very little importance in the last 10 years according to the published work surveyed. This article surveys the most important work ...

    • Determination of Sara constituents of southwestern Nigerian tars sands and their Physical properties 

      Bello, O. O.; Macaulay, S. R. A.; Adebiyi, F. M.; Sonibare, J. A. ( Qatar University , 2005 , Article)
      Utilization potentials of Nigerian massive crude bitumen and associated heavy oil represent a promising source of security and economic benefits for the nation. However, production and processing technology of tar sands ...

    • Material Behaviour Under Corrosive Environment — Guide For Material Selection 

      Kandeil, A. Y.; Shawki, G. S. A. ( Qatar University , 1988 , Article)
      In this paper, the behaviour of engineering materials as influenced by fluid velocity, operating temperature, humidity and duration of exposure to chemical and/or electro-chemical action is carefully studied, corrosive ...

    • A Review of Fatigue Testing Machines 

      Shawki, G. S. A. ( Qatar University , 1990 , Article)
      In this paper fatigue testing facilities are first classified in accordance with a number of features which include purpose, type of loading, method of load application and transmittal as well as control system. Owing to ...

    • Use Of Cement By-Pass Dust In Soil Stabilization 

      Taha, Ramzi; Al-Rawas, Amer; Al-Harthy, Ali; Al-Siyabi, Hilal ( Qatar University , 2001 , Article)
      Cement by-pass dust (CBPD) or cement kiln dust (CKD) is a by-product of the manufacture of Portland cement. It is generated during the calcining process in the kiln. Lime (CaO) constitutes more than 60% of CBPD composition. ...

    • 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 ...