Engineering Journal of Qatar University - [From 1988 TO 2005]: المرسلات الحديثة
السجلات المعروضة 61 -- 80 من 221
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Rainfall Characterization In An Arid Area
( 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 ... -
Performance Evaluation Of A Msf Desalination Plant In Qatar
( 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 ... -
Long – Term Soaking Effect On Strength And Deformation Characteristics Of A Gypsiferous Subgrade Soil
( Qatar University , 2003 , Article)The behaviour during long-term soaking of the California Bearing Ratio (CBR), the resilient modulus and the deformation of compacted Iraqi gypsiferous soil containing about 34% gypsum was studied. Sixteen (CBR) samples ... -
The Potential of The Co-Rotating Compressor in Gas Turbine Applications
( 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. ... -
Throughput-Delay Performance Analysis Of Ssma Packet Radio Network
( Qatar University , 2000 , Article)Multiple access communication accommodates a large population of relatively uncoordinated users of a common spectral allocation in the same and neighboring geographical areas with the number of simultaneous users proportional ... -
Productivity And Economical Feasibility Of Multi Lateral Wells In Comparison Of A Horizontal Well
( 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 ... -
Economic And Thermal Performance Of Thermostone In Qatar
( 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 ... -
Effect of sulphates in cement (containing 5% pozzolana) and in sand on the correlation between compressive strength and u.p.v. of concrete of different mixes
( Qatar University , 1990 , Article)Sulphates may be found in any of the raw materials of cement. Sand contaminated with sulphates is currently a local problem because of the difficulty in obtaining well-graded sand which could be used in concrete that has ... -
Time-Optimal Control Of High-Speed Flexible-Robot Arm Using PD Algorithms
( 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. ... -
Electrode Surface Roughness Effect on the Breakdown Characteristics of Compressed Gas Cable
( 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 ... -
Feasibility Of Oil Recovery By Polymer/Alkaline Flooding Through Horizontal Well
( Qatar University , 2000 , Article)A laboratory study on Saudi oil recovery by polymer/alkaline flooding from a horizontal well in a scaled quarter five-spot model was conducted. Safaniya crude oil, obtained from Safaniya oil field operated by Saudi Aramco, ... -
Liquid Density Of Pure And Multicomponent Fluids By Scaled-Variable-Reduced-Coordinate (Svrc) Method
( Qatar University , 1995 , Article)The Scaled-Variable-Rcduced-Coordinatc (SVRC) method with a proposed set of mixing rules are applied to calculate the liquid density of several system of liquid mixture and satisfactory results are obtained. The ability ... -
Experimental Measurement Of Drop Phase Mass Transfer Coefficients For The Carbon Tetrachloride-Acetic Acid-Water System
( Qatar University , 1991 , Article)The overall mass transfer coefficients of single drops of carbon tetrachloride falling in a stagnant continuous phase of water containing acetic acid as solute were measured experimentally for different dispersed phase ... -
A Demodulation Technique For Power System Local Frequency And Voltage Measurements
( Qatar University , 2003 , Article)The demodulation technique of two complex signals is used to estimate the power system local frequency and voltage phasor. The first complex signal is generated from the three-phase voltage waveform by using the ... -
Utilization Of The Desired Machined Surface Roughness Number As A Criterion For Cutting Tool Replacement Strategy
( Qatar University , 1992 , Article)Current research in metal removal processes does not provide predictive relationships vitally needed for the selection of machining conditions or specifying limitations on the cutting tool and work material responses. ... -
Differential Amplitude Phase Shift Keying (Dapsk): A New Modulation Method For A Turbo Code In Digital Radio Broadcasting
( Qatar University , 2003 , Article)The multilevel modulation techniques of M–Differential Amplitude Phase Shift Keying (DAPSK) have been proposed in combination with Turbo code scheme for digital radio broadcasting bands below 30 MHz radio channel. Comparison ... -
Influence Of Reservoir Parameters On Bacterial Enhanced Oil Recovery
( Qatar University , 2002 , Article)The aim of this paper is to show the scope of the applicability of bacteria for enhanced oil recovery (EOR) in the oil reservoirs. The Application of conventional EOR-techniques is economically problematic because of ... -
Transmission Of Compressed Video Signals Through A Spread Spectrum Channel
( Qatar University , 2001 , Article)This research studies the feasibility of devising a compression scheme for video sequences that is robust to fading errors in a spread spectrum environment. Schemes like subband coding and pyramid coding are inherently ... -
A Computer Aided Design Tool For Area Optimization Using Breadth First Search Technique
( 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 ... -
Non Uniform Differential Amplitude Phase–Shift–Key (Dapsk) Modulation For Multimedia Multicast Wireless Communications With Punctured Convolutional Coding
( Qatar University , 2003 , Article)Simple closed–form expressions for the probability of error for nonuniform M–ary Differential Amplitude Phase–Shift–Key (DAPSK) signaling over an Additive White Gaussian Noise (AWGN) and Rayleigh fading channels are ...
