Engineering

Research Papers/Topics in Engineering

The effects of Security mechanisms on VoIP communication Quality of Service

AbstractVoice over Internet Protocol (VoIP) is one of the most important technologies in the world of communication.Mass business sector VoIP telephony started in 2004 with the presentation of VoIP calling arrangements which allowed endorsers of make calls generally as they would with traditional phone organization administrations [1]. VoIP is the steering of voice conversation over the Internet or some other IP-based system [2]. The voice information streams over a broadly useful parcel exch...

Dynamic Quadrotor Traffic Offense Monitoring System

ABSTRACTThe unavailability of strong technologies in the police force as far as traffic offenses are concerned has led to many law violators going unpunished, and the root cause of this is the limitation that all traffic road blocks around the country are totally dependent on human effort or power. The need for cheaper, smarter and efficient traffic monitoring system facilities in the police force has brought to introduction of small unmanned copters that can execute human tasks with less res...

Investigate the Effect of Permeability on the Selection of Diverter in Limestone Matrix Acidizing

This paper will aim at investigating effect of permeability on selecting best diverter in carbonate matrix acidizing. Two types of diverters were used, 15% HCl Gelled Acid and Slickwater+15% HCl. Permeability varied from 50md, 100 and 300md. Results showed that 15% HCl Gelled Acid gave better results than VDA where it had lower skin value and better invasion depth.  

A Model To Determine Safe Zone Margin For Mobile Base Station Sites In Residential Areas With Reference To Emarald Hill And Greencroft Residences, Harare, Zimbabwe

ABSTRACTThe issue of EMF radiation has for years been received with mixed feelings by all stakeholders. In this study, the relationship between EMF exposure levels with distance from the mobile base station has been illustrated. The contributions of each frequency band used by mobile operators in Zimbabwe, with reference to the area of study has been assessed and compared using well informed data and assumptions. Graphs have been used to clearly show such contributions and matlab was used for...

Optimal Power Flow Solution To Voltage Collapse In A Deregulated Electricity Market

ABSTRACT The thesis addresses the fundamental means of overcoming the challenge posed by voltage collapse to the success of electricity market unbundling. As regards the record available from the recent deregulation and unbundling of the Generation and Distribution segment of the electric power system, it has become evidently necessary to investigate the best and optimal operating conditions under which the transmission system is expected to perform with respect to the high level of tra...

Optimal Load Frequency Control Of Two Area Power System

ABSTRACT Modern power systems are operated under various constraints which are meant to ensure an appropriate delivery of service. Meanwhile power system faces imbalance in power generation and its consumption in which the higher the load consumption the lower the frequency of operation. The governor-turbine combination will then experience a devastating reduction in its frequency of operation due to disturbance that may lead to system collapse. Both governor and turbine are included in t...

Development Of Optimal Placement Of Distributed Generators In Electrical Network Using Improved Strength Pareto Evolutionary Algorithm

ABSTRACT In recent times, the issue of the gap between electricity supply and demand has been addressed using distributed generation (DG) technology. When DG technology is properly placed within a transmission and distribution network, there is always improvement in power loss reduction, voltage profile and system reliability. Proper placement can be achieved by evaluating the optimal values for voltage deviation, real power loss and bus voltage. Thus, this study presents a multi-objectiv...

Evaluating the Energy and Carbon (IV) Oxide (CO2) Reduction Resulting from Efficient Lighting at the University of Lagos, Nigeria

Abstract This study evaluated the economic and environmental potentials of improving the energy efficiency of the lighting technology at the University of Lagos, Nigeria. The energy audit report for the Faculty of Engineering, University of Lagos before retrofitting shows that all lighting fixtures in the lecture rooms are the 1.2 metre inefficient fluorescent lamps. The cost effectiveness of lighting retrofitting with Compact Fluorescent Lamps (CFL) and Light Emitting Diode tube (LED) l...

Comparative Study Of Meta -Heuristic And Classical Techniques For Automatic Generation Control Of A Multi -Source Singlearea Hydro-Thermal-Gas Power System

ABSTRACT The PID controller still remains a widely used and very effective means of achieving stability in control systems. Generally, the performance of the controller is determined by the proportional, integral and derivative gains of the controller. The classical techniques: ZieglerNichols (ZN) open loop method; ZN closed loop method; Chien-Hrones-Reswick (C-H-R) load rejection method; and meta-heuristic technique: the fuzzy logic algorithm, are used to determine the tuning parameters...

Evolving 4G KPIs to improve end user QoE for 4G LTE broadband systems.

AbstractIn the last half decade data traffic has surpassed voice traffic in telecommunications networks. Legacy networks could not cope with the overwhelming data traffic and exponential increase in subscribers. To address legacy systems limitations in this regard 4G LTE was introduced. With reduced network elements and advanced robust modulation technologies 4th generation systems offer data speeds much more than 3G and wired networks. In addition, 4G offers a variety of services which could...

Green Synthesis Of Tio2 Nps Using Ximenia Caffra Leaf Extract And Their Application In Poultry Feeds As An Antibacterial Agent.

BSTRACTPhytosynthesis of TiO2 NPs from Ximenia Caffra leaf extract and their application in poultry feeds as an antibacterial agent was done. Reaction time and pH effect for the synthesis of TiO2 NPs were optimized using a single factor method. A Central Composite Design (CCD) was used to determine the effect of linear factors (titanium tetrachloride concentration, temperature and leaf extract volume) and their interactions on the synthesis of TiO2 NPs. A total of twenty experiments formulate...

Quality Of Service Measurement And Evaluation In Telecommunications: A Case Study Of Africom (Private) Limited

AbstractThis research work studied the behaviour of Africom’s converged network,measured and evaluated the QoS of service of the network with the various trafficstreams. Its objective was to identify and measure the different metrics that affectthe delivery of QoS in the network. Parameters for measuring QoS were be identifiedand measured and the overall performance of the network evaluated. The approachthat was adopted was guided by the subscriber concerns as well as the technicalparameter...

Electrodeposition Of Zinc Oxide Nano Particles On Multiwalled Carbon Nanotubes Modified Glassy Carbon Electrodefor Simultaneous Detection Of Acetaminophen And Caffeine

ABSTRACTA new simple novel electrochemical sensing platform based onelectrodeposition ofnano zincoxide ontomultiwalled carbon nanotubes modified glassy carbon electrode was constructed. Themodified electrode was characterized by cyclic voltammetry and electrochemical impedance in aredox probe.The electrode surface area after modification was 0.15 cm2, which was twice largethat of a bare glassy carbon electrode. The new fabricated sensor was applied for individual andsimultaneous determination...

A Critical Analysis Of Prisons As Discourse Communities: An Examination Of Whawha Prison Complex.

ABSTRACTThis research looks at the prison community as a discourse community. The study alsoprovides a sociolinguistic analysis of the language used at Whawha Medium OffendersPrison. Through the analysis of language the study also explores certain aspects of prison lifeat Whawha prison complex. The study uses the ‘sociolinguistics theory’. The researchexamines Whawha Prison Complex as a discourse community, investigates how the inmatesat Whawha Prison Complex use language in a peculiar wa...

Public Transport Inventory Monitoring System for Developing Countries

ABSTRACTThis report serves to give an account for a research on a Public Transport Inventory Monitoring System for Developing Countries. The research is based on the current situation in Zimbabwe where the public transport industry is dominated by the informal sector. In this document there is a discussion of the transport industry in Zimbabwe, identification of the problem of accountability of inventory in the current industry, a methodology to help solve the problem and the results of using...


61 - 75 Of 2070 Results