• On the Design of Bit-Slice Processors 

      Bishai, S.; Metwally, M. S. ( Qatar University , 1988 , Article)
      In the past decade, fixed instruction microprocessors have evolved from 4 bits to 32 bits. Their compact design and relative low cost have made them very popular with design engineers. Their use extends into a lot of ...
    • 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 ...
    • Laboratory-Scale Tests on Gas-Solid Fluidized Bed Behaviour And Its Influence on Bed Thermal Properties 

      Abdel Monem, N.; Yakoub, Y. ( Qatar University , 1988 , Article)
      The success of many industrial processes depends upon good contact between a fluid and particulate solid. A fluidized bed fulfils the requirements for this good contact. This paper presents the results of an experimental ...
    • A Compressive Strength Criterion for Anisotropic Rock Materials 

      Ashour, H. A. ( Qatar University , 1988 , Article)
      This paper puts forward a general compressive strength criterion for anisotropic rock materials under multiaxial state of stress. The proposed criterion, is a generalization of the Von Mises yield criterion for ductile ...
    • The Potential of The Co-Rotating Compressor in Gas Turbine Applications 

      Okelah, M.R.S. ( Qatar University , 1988 , Article)
      The concept of co-rotating axial compressor was conceived primarily as a means of overcoming the inherent rotational speed mismatch between a fan and its driving turbine in moderate to high bypass ratio turbo-fan engines. ...
    • Design of Smoke Generator for Flow Visualisation 

      Shahin, M. M ( Qatar University , 1988 , Article)
      Described in this paper is an alternative method for smoke generation for flow visualisation in low speed (subsonic) wind tunnel work. This method makes use of the smoke generating characteristics of Ammonia and Sulphur ...
    • Comparison of Recursive Parameter Identification Techniques for Computer Control of Power Systems 

      Sheirah, M. A.; El-Sayed, M. A. H. ( Qatar University , 1988 , Article)
      This paper outlines the main features of parameter identification in electric power systems. A series of recursive parameter identification techniques is presented, this containing the generalized — and extended least ...
    • 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 ...
    • Electrode Surface Roughness Effect on the Breakdown Characteristics of Compressed Gas Cable 

      Eteiba, M. B. ( Qatar University , 1988 , Article)
      The influence of electrode surface roughness on the breakdown field strength in SFu gas and mixtures is investigated. A coaxial electrode configuration is used to represent a practical gas insulated cable. With the use ...
    • 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 ...
    • Corrosion Failures: Identification, Diagnosis & Remedies 

      Shawki, G. S. A.; Kandeil, A.Y. ( Qatar University , 1988 , Article)
      This paper deals with the nature, typical surface features and common forms of corrosion. It also reports corrosion rates in various locations and under differing environmental conditions, viz. tropical, marine, urban and ...
    • 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 ...
    • Ceramics As Materials Of Construction 

      Zaki, A; Eteiba, M. B.; Abdelmonem, N.M. ( Qatar University , 1988 , Article)
      This paper attempts to review the limitations for using the important ceramics in contact with corrosive media. Different types of ceramics are included. Corrosion properties of ceramics and their electrical properties are ...
    • Designing Air Intake Ducts for High Speed Flight 

      Kamal, W. A.; Anwar, Anwar E. M. ( Qatar University , 1988 , Article)
      A proven duct flow model is used to examine the influence of the intake duct geometric and inlet flow parameters on the pressure recovery performance of intake ducts for high speed flight. The geometric parameters include: ...
    • Simulation of Cross-Current Extraction Processes 

      Salem, A. B. ( Qatar University , 1988 , Article)
      Extraction processes dealing with partially miscible solvents are usually calculated by graphical methods to estimate the number of stages required, flow rates and compositions of the streams. Such procedures may be lengthy. ...
    • 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 ...
    • Control of Void Formation During Forging of Advanced Fiber Reinforced Composite Materials 

      Kandeil, A. Y. ( Qatar University , 1989 , Article)
      Increased interest has emerged in recent years in the development of fiber reinforced superalloy composite materials and the fabrication processes to produce composite turbine vanes and blades for advanced gas turbine ...
    • Full Scale Performance of Primary Settling Tanks 

      Ahmad, Shamim; Murad, M.; Javed, K. H. ( Qatar University , 1989 , Article)
      The characteristics and the flowrate of municipal wastewater from the city of Doha, located in the Arabian Gulf have been studied to examine their effect on the performance of the primary settling tanks at the local sewage ...
    • Analysis of A Screen Type Solar Air Collector Without Transparent Cover 

      Hassab, M. A. ( Qatar University , 1989 , Article)
      The performance of a screen type solar air collector of different uniform mesh sizes and without a glass cover is investigated theoretically. Formulation of simultaneous radiation and convection heat transfer for a semi-steady ...
    • Refractivity Statistics For Two Countries In The Middle East 

      Kheirallah, H. N. ( Qatar University , 1989 , Article)
      This paper presents and compares the results of refractive index studies for Mersa Matrouh, Egypt, and Doha, Qatar. Statistics for surface refractivity and refractivity gradients at different heights from the surface are ...