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

Now showing items 61-80 of 221

    • Flash Point For Binary Mixtures 

      Donaldson, A. B.; Al-Sharafi, Saleh ( Qatar University , 1994 , Article)
      Three flammable binary systems were studied for flash point as a function of liquid mixture composition: 1) decane/dodecane, 2) 0-xylene/cyclohexanol, and 3) 2-propanol/water. The vapor composition was estimated at each ...

    • Design Of An E-Mail System For Personal Computers 

      El Hadidi, M. T.; Mohammad, Sultan A.; Metwally, Mostafa S. ( Qatar University , 1991 , Article)
      The design of an Electronic-Mail system that can operate in a personal computer (PC) environment is presented. The underlying philosophy is based on a centralized mailbox approach, wherein a dedicated SERVER stores the ...

    • Creep Buckling Of Plates Under Biaxial Compression 

      Ashour, H. A.; Shaker, Magdy A. ( Qatar University , 1992 , Article)
      This work presents an analysis for the creep buckling problem of geometrically imperfect rectangular flat plates under biaxial compression with simple support boundary conditions. The analysis is based on a non-dimensional ...

    • Time-Optimal Control Of High-Speed Flexible-Robot Arm Using PD Algorithms 

      Fanni, Mohamed; Abdel-Rahman, Tarek; Al-Salem, Nabeel ( Qatar University , 2000 , Article)
      This paper addresses utilization of proportional-plus derivative (PD) control algorithms for time-optimal control of flexible-robots. Flexibility is modeled using one mode of vibration with negligible structural damping. ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Economic And Thermal Performance Of Thermostone In Qatar 

      Selmi, M.; Tag, Ismail A. ( Qatar University , 1996 , Article)
      This paper is concerned with the performance characteristics of thermostone as a building material, and their comparison with those of hollow concrete blocks. Carrier Advanced Load Program (E20-II) was used to estimate the ...

    • 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 ...

    • 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 ...

    • Heighting Accuracy Of Spot Imagery 

      Diefallah, M. A. M. ( Qatar University , 1991 , Article)
      The SPOT imaging system is the first sensor with stereoscopic capability and global continuous coverage. Stereopairs with overlap and base to height ratio suitable for the extraction of height information with reasonable ...

    • 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 ...

    • Unsteady-State Interphase Diffusion 

      Chebbi, R. ( Qatar University , 1993 , Article)
      This study is concerned with the problem of unsteady interphase diffusion for multicomponent dilute solutions. An integral technique, based on an approximate boundary-layer approach is used. Results are in good agreement ...

    • 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 ...

    • On Improving Communication Software Development Process 

      El Soudani, Magdi M. Said ( Qatar University , 1995 , Article)
      This paper aims to standardize the software development process by making use of the well-established hardware development process. The procedure can be applied to any engineering software development process, but we ...

    • Gas Saturation Monitoring In Heterogeneous Reservoir Using Tdt Modeling Technique 

      Hamada, G. M; Dahab, A.A.; Abdel Dayem, M. M.; Heikel, S. ( Qatar University , 1999 , Article)
      The Zeit Bay field reservoir units consist of sandstone and carbonates, partially overlaying a tilted block of fractured basement reservoir with a complex drive mechanism. A secondary recovery scheme of gas re-injection ...

    • Construction Simulation Using Virtual Reality 

      Naji, Khalid K.; Najafi, Fazil ( Qatar University , 1996 , Article)
      Two main simulation methodologies namely, the network-based simulation and the graphical simulation technique are being used in the construction industry. While the network-based simulation technique, which was originally ...

    • Concrete Pavement Truck Equivalence Factors For Upgrades 

      Razouki, Sabah Said; Mohee, Sakvan Omer ( Qatar University , 1999 , Article)
      Presented in this paper are the upgrade truck equivalence factors for single unit trucks of type, 1.2 and 1.22 which are not covered by AASHTO. The equivalency factors for front and rear axles of single unit trucks were ...

    • A Computer Aided Design Tool For Area Optimization Using Breadth First Search Technique 

      Al Mohannadi, A. L.; Saleh, Ahmed ( Qatar University , 1991 , Article)
      Floorplanning is the process of partitioning an area on any surface such that the partitions guarantee minimum wasted area. The technique used to partition a given are depends on the requirements of the application. In an ...

    • 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 ...