Now showing items 162-181 of 221

    • Productivity And Economical Feasibility Of Multi Lateral Wells In Comparison Of A Horizontal Well 

      El Sayed, Abdel Alim H.; Al-Awad, M. N.; Al-Blehed, M. S.; Al-Saddiqui, M. A. ( Qatar University , 2000 , Article)
      This paper presents an economical model developed for assessing the feasibility of drilling multi lateral holes for exploiting oil reservoirs. Detailed equations are given for calculating the cost, return on investment and ...
    • 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 ...
    • Pyrolysis Kinetics of Oil-Palm Solid Waste 

      Mohd Din, Azam T.; Hameed, Bassim H.; Ahmad, Abdul Latif ( Qatar University , 2005 , Article)
      Pyrolysis of oil-palm shells, a cheap and abundantly available solid waste from palm oil producing process, was carried out using thermogravimetric analysis. The effect of heating rates (10,15,20 and 25°C/min) on the kinetic ...
    • Qualitative And Quantitative Assessment Of Drained Water From Urban Ground-Water 

      Al Hajri, Mohd. M.; Shadid, Fawzi T.; Al-Hajri, Khalid; Ahmed, Shamim ( Qatar University , 1992 , Article)
      Although the groundwater table in the State of Qatar peninsula is reducing, there is a persistent increasing level of groundwater in some areas in Doha city. This increasing tendency could be attributed to the topography ...
    • 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 ...
    • Rainfall Characterization In An Arid Area 

      Bazaraa, A. S.; Ahmed, Shamim ( Qatar University , 1991 , Article)
      The objective of this work is to characterize the rainfall in Doha which lies in an arid region. The rainfall data included daily rainfall depth since 1962 and the hyetographs of the individual storms since 1976. The ...
    • Random Distributed Algorithms For Clock Synchronization 

      Nakai, Shoichiro ( Qatar University , 1992 , Article)
      This paper proposes clock synchronization algorithms based on the idea in which randomly chosen m out of the total N processors cooperate to perform the clock adjustment of all processors in a distributed system. Selection ...
    • Recent Advances In Coring And Core Analysis Technology New Technique To Improve Reservoir Evaluation 

      Al Saddique, M.A; Hamada, G. M.; Al-Awad, M. N. ( Qatar University , 2000 , Article)
      The main goal of core analysis is to reduce uncertainty in reservoir evaluation by providing data representative of the reservoir at in situ conditions. Basic core analysis measurements are unchanged, but advances in core ...
    • Recognition Of Cursive Texts Using Hamming Neural Nets 

      Katebi, S. D. ( Qatar University , 1994 , Article)
      Hamming Neural networks are employed for cursive text character separation and recognition. The digitized image of the scanned text is first enhanced by applying simple contrast stretching algorithm. Image registration is ...
    • 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 ...
    • 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 ...
    • Refrigerants Beyond 1995 - An Overview 

      Kamal, W. A. ( Qatar University , 1994 , Article)
      The count down has started. Less than 400 days, that is all the time left till the complete phase-out of CFC production. No more refrigerants R-l 1, R-12 or R-500 will be produced worldwide. With our extreme dependence - ...
    • Repetitive Control Based Pwm Inverter Dead-Time Compensation For Ac Servo Drive 

      Ben-Brahim, L. ( Qatar University , 2002 , Article)
      AC servomotor speed or current controller based on PI control and/or optimal control, can not eliminate the cyclical fluctuations of speed or current when subject to periodic disturbances. However, repetitive control ...
    • 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 ...
    • A Review Of Petroleum Engineering Aspects Of Qatar's Oil And Gas 

      Al Siddiqi, Ahmed; Dawe, Richard ( Qatar University , 1998 , Article)
      This paper reviews, from a petroleum engineering point of view, the 60 years of discovery and development of tlie oil and gas resources within the boundaries of the State of Qatar. Up to 1990 there were four major hydrocarbon ...
    • Secondary vs. Tertiary oil recovery from a two-dimensional porous media by microemulsion flooding 

      Sayyouh, M. H. ( Qatar University , 1989 , Article)
      The objective of this research was to study the application of microemulsion flooding in a visual, two-dimensional sandpack for the purpose of investigating the efficiency of oil displacement during secondary and tertiary ...
    • Selection Of Optimized Fuzzy Rules For Process Control Systems: Using Genetic Algorithms 

      Katebi, S. D. ( Qatar University , 1996 , Article)
      In this paper modeling, selection and optimization of fuzzy rules for multivariable feedback process control and decision making systems are developed and discussed. A general model for multivariable fuzzy rules is derived ...
    • A Self-Organizing Multisensor Fusion Classification Algorithm 

      Mamlook, Rustom ( Qatar University , 1996 , Article)
      A self-organizing multisensor fusion algorithm to classify the inputs (data or images) into classes (targets, backgrounds) is presented. The algorithm forms clusters and is trained without supervision. The clustering is ...
    • Shear Behavior Of Reinforced High-Strength Concrete Beams Without Shear Reinforcement 

      Wafa, Faisal F. ( Qatar University , 1994 , Article)
      Eighteen rectangular singly reinforced high-strength concrete beams without web reinforcement were tested in combined shear and flexure. The main variables were the longitudinal steel reinforcement ratio and the shear-span ...
    • Signal Identification Using A Microprocessor Based Phase Locked Loop System 

      Metwally, M. S. ( Qatar University , 1989 , Article)
      A scheme for waveform comparison and the measurement of periodic signal parameters through processing, controlling and measuring programs is realised. A microcomputer is used with a phase locked loop voltage controlled ...