Engineering Journal of Qatar University - [From 1988 TO 2005]: المرسلات الحديثة
السجلات المعروضة 141 -- 160 من 221
-
Performance Evaluation of A Class of Adaptive Bifurcated Routing Algorithms
( 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 Algorithms Of Digital Automatic Voltage Regulators For Synchronous Generators
( Qatar University , 1990 , Article)The main concepts of the application of digital controllers to a power system as automatic voltage regulators are presented in this paper. An experimental study using a physical model of a limited size power system has ... -
Dynamic Analysis Of A Novel Manpowered Transportation Vehicle With High Mechanical Efficiency
( Qatar University , 2002 , Article)This paper evaluates the dynamics of a novel manpowered transportation vehicle. The vehicle has a novel mechanism that maximizes the mechanical input work and utilizes the weight of the rider for propulsion. The rider ... -
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 ... -
Behaviour of Grey Cast Iron Under Combined Bending and Tension
( Qatar University , 1989 , Article)This paper deals with the strength of grey cast iron components subjected to combined bending and tension, this case of loading being met in C-frames and clamps, crane hooks and various eccentrically—loaded protruding ... -
Amorphous Phase Properties Of Oriented Polyethylene Solids
( Qatar University , 1993 , Article)Solid-state deformation of polyethylene results in a preferential orientation of both crystalline and amorphous regions. Usually, one major problem in the prediction of the mechanical and thermal expansion properties of ... -
Computer Aided Design Of Microstrip Taper Lines
( Qatar University , 1999 , Article)This work presents an accurate computer aided design (CAD) for niicrostrip taper lines in the microwave range of frequency. This CAD considers all design parameters affecting the characteristics of the line for different ... -
Hierarchical Floor Plan For Vlsi Integrated Circuits Based On Analytical Techniques
( Qatar University , 1990 , Article)The physical design of electronic circuits consists of transforming a design specification into a representation to be used in the manufacture of the physical circuits. At Very Large Scale Integration (VLSI) level it becomes ... -
Multicriterion Optimization Approach For The Design Of Induction Motors
( Qatar University , 1999 , Article)In most engineering design problems, trade offs are to be made among competing factors. This is obvious in the design of electric motors, when more than viewpoint is to be considered. In this paper the problem of induction ... -
An Improved Model Describing Mass Transfer In Three-Phase Fluidized Beds
( Qatar University , 1990 , Article)A model for describing mass transfer in three-phase fluidized beds has been developed and tested using experimental data. The presence of two distinguishable mass transfer zones in three-phase fluidized beds led to the ... -
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 ... -
Effect Of Drilling Fluids Contaminations On Saudi Reservoir Rock Wettability
( Qatar University , 1998 , Article)Wettability is a key parameter that affects the petrophysical properties of reservoir rocks. Mud nitrate during drilling pay zone causes a significant change in rock wettability that will affect the oil production and ... -
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. ... -
Determination of Sara constituents of southwestern Nigerian tars sands and their Physical properties
( Qatar University , 2005 , Article)Utilization potentials of Nigerian massive crude bitumen and associated heavy oil represent a promising source of security and economic benefits for the nation. However, production and processing technology of tar sands ... -
Parametric Study On Single Machine Early/Tardy Problem Under Fuzzy Environment
( Qatar University , 2002 , Article)This paper presents a solution algorithm for solving the single machine early/tardy problem having fuzzy parameters in the constraints. There are several cost structures: job-independent, job-dependent and symmetric, and ... -
A Comparison Between Artificial Neural Network And A Geostatistical Technique In The Estimation Of Regionalized Variables
( Qatar University , 1999 , Article)In all mining estimation techniques data play a very important role. Insufficient data would mean the quality of the estimate is unreliable. Due to the importance attached to a good and representative data set, the application ... -
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 ... -
On Loss Probabilities for Delayed - Access Circuit - Switched Multiplexers
( Qatar University , 1989 , Article)Multiplexing schemes for packetized circuit-switched sources are characterized by an avoidable accessing delay. In the present work it is shown that, contrary to conventional immediate-access multiplexing schemes, one can ... -
On the Design of Bit-Slice Processors
( 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 ... -
The Behavior Of Molasses As A Microbial Nutrient In The Absence Of Microbes
( Qatar University , 2000 , Article)In this work the effect of molasses, as a bacterial nutrient, on the pH and surface tension of the aqueous phase, IFT, and phase behavior after one week contact time was studied at 60°C. The results have shown that the pH ...
