Browsing Engineering Journal of Qatar University - [From 1988 TO 2005] by Title
Now showing items 209-221 of 221
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Ultrasonic C-Scan Inspection Of Composite Materials
( Qatar University , 1992 , Article)Ultrasonic technique using an automated C-scan has been established as the primary inspection method for composite materials. In this paper, the principles of ultrasonic inspection, the type of defects that may be generated ... -
Ultrasonic Characterization, Tensile Testing And Thermal Properties Of Y Irradiated Low Density Polyethylene, Fb 5005
( Qatar University , 1997 , Article)Ultrasonic pulse-echo technique, tensile testing and thermal gravimetric analysis have been utilised to characterise and monitor the effect of y irradiation on the physicomechanical properties of low density polyethylene ... -
Ultrasonic Pulse Velocity Versus Strength For Concrete In Qatar
( Qatar University , 1992 , Article)Compressive strength of concrete is widely accepted as a characteristic property indicating and representing its quality. The accuracy of both ultrasonic and mechanical strength is discussed and the advantages of ultrasonic ... -
Unrelated Machines Scheduling With Machine Eligibility Restrictions
( Qatar University , 2002 , Article)In this paper we present a new heuristic algorithm to minimize the makespan for scheduling jobs on unrelated parallel machines with machine eligibility restrictions ( R^ I M .1 C^^). To the best of our knowledge, the ... -
Unsteady State Process Computations On Spreadsheets
( Qatar University , 1993 , Article)Spreadsheets are becoming increasingly popular, as a useful tool, for making process engineering calculations. This paper shows the use of spreadsheets for computations of an unsteady state process described by ordinary ... -
Unsteady State Two Phase Flow Pressure Drop Calculations
( Qatar University , 1992 , Article)A method is presented to calculate unsteady state two phase flow in a gas-liquid line based on a quasi-steady state approach. A computer program for numerical solution of this method was prepared. Results of calculations ... -
Unsteady-State Interphase Diffusion
( 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 ... -
Use Of Cement By-Pass Dust In Soil Stabilization
( 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. ... -
Use Of Spreadsheets For Rainfall-Runoff Calculations
( Qatar University , 1996 , Article)The nature of rainfall-runoff calculations necessitates the use of different equations for calculating losses and several response functions to route the effective rainfall hyetograph through the catchment. 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. ... -
Viscosity Of Hydrocarbon Liquids Saturated With Gas
( Qatar University , 1995 , Article)Experimentally measured kinematic viscosities are reported for benzene, cyclohexane and n-heptane saturated with hydrogen, nitrogen and carbon dioxide. A Zeitfuchs cross-arm viscometer suspended in a unique design ... -
The Voltage Collapse Problem Based On The Power System Loadability
( Qatar University , 1997 , Article)This paper addresses the problem of voltage instability at which the power system reaches its maximum admissible load. A voltage collapse proximity indicator (VCPI) is derived and its performance is investigated. The VCPI ... -
Voltage Stability Margin Identification Using Local Measurements And Linear Kalman Filter
( Qatar University , 2002 , Article)Voltage stability investigation is of a great importance for long-term electric load expansion as well as power system operation. This paper presents a new algorithm for identification of voltage instability in a specified ...
