Engineering

Research Papers/Topics in Engineering

An Introduction to Adaptive QAM Modulation Schemes for Known and Predicted Channels

ABSTRACT | A major disadvantage with fixed modulation (nonadaptive) on channels with varying signal-to-noise ratio (SNR) is that the bit-error-rate (BER) probability performance is changing with the channel quality. Most applications require a certain maximum BER and there is normally no reason for providing a smaller BER than required. An adaptive modulation scheme, on the contrary, can be designed to have a BER which is constant for all channel SNRs. The s...

A Novel Mobile WiMAX Solution for Higher Throughput

Abstract— The IEEE 802.16 standard, also known as WiMAX,has emerged as an exciting technology for broadband wirelesscommunications with potentials to offer high throughput andsupport high bandwidth demanding applications. WiMAX,however, has yet to prove its effectiveness when the end terminalsare not fixed and have the capacity to move from one place toanother at different speeds. Recent studies suggest that whileWiMAX (802.16e) has the potential to deliver a data rate up to 75Mb/s for fixe...

Adaptive modulation for cognitive radios

TABLE OF CONTENTSPageABSTRACT ……………………………………………………………………………..iiiACKNOWLEDGEMENTS……..………………………………………………………..ivLIST OF ILLUSTRATIONS………………………………………………………….…viiSECTION1. INTRODUCTION……………………………………………………….…….12. DEFINITION OF A COGNITIVE RADIO………………..…….……………43. OPERATION OF A C...

Influence of Composition on the Thermophysical Properties of LNG

The saturated liquid density deviations were compared using the PR, RSK (Advanced), AGA8, and GERG2008 EoSes. The bubble pressure deviations, saturated liquid densities, isobaric specific heat capacities, and enthalpy of vaporization were compared using the PR, RSK (Advanced) and GERG2008 EoSes. The GERG2008 EoS was used to analyse the effect of nitrogen and heavy alkanes on the thermophysical properties of LNG mixtures. Experimental density data was used to compare the accuracy of ...

Design and Simulation of Telemetry Link and Power System for ABT-18 Unmanned Aerial Vehicle

ABSTRACTThe Airbeetle-18 unmanned Aircraft is an Aircraft design for the purpose of surveillance following the fact that the parent Airbeetle-18 has almost reached the end of its life time. Hence, there is need to convert it to an unmanned aircraft in other to extend its service life time.A comprehensive literature review was carried out on Telemetry and power system design and the previous work done as it pertains to aircraft in Airbeetle-18 category. Furthermore, system requirem...

STUDIES ON THE HAEMATOLOGICAL CHARACTERISTICS OF CLARIAS GARIEPINUS FROM GUBI DAM, BAUCHI STATE, NIGERIA

ABSTRACTStudies were carried out to determine the haematological characteristics of Clarias gariepinus healthy specimens were obtained from Gubi dam. Blood sample ranging between 1.0-1.5ml were taken with the aid of sterilized syringe (21G) inserted by caudal vein puncture. The haematological parameters for each blood specimen were measured using automated haematological analyzer (sysmex  Kx 21N; 000758 model). Blood biochemical analysis to determine plasma albumin, glucose, protein, sodi...

Effect of coconut fibre on the properties of maize-cob cement sheet

Nigeria has plenty of Agricultural waste products such as coconut fibre, rice husk, corn cob and oil palm frond fibre. If the waste cannot be disposed properly it, will lead to social and environmental problem.The selection of coconut fibre in this study is a good effort in order to reduce a bulk of coconut fibre waste in Nigeria, according to a survey that was conducted by Ministry of Agricultural, Malaysia  (Hisbany, 2005). There will be a huge amount of waste with these huge plantatio...

Laboratory Report on PID Controller Design for DC Motors Speed Control

ABSTRACTThis experiment is to design PID controller to supervise and control the speed response of a DC motor and MATLAB program is used for calculation and simulation. PID controllers are widely used in an industrial plants because of their simplicity and robustness. Industrial processes are subjected to variation in parameters and parameter perturbations; hence, PID controllers that can provide good closed-loop response characteristics are chosen.TABLE OF CONTENTAbstract ......................

Construction of 12V 10A Solar Charge Controller for Solar Energy Utilization

AbstractThis project work centered on construction of 12V/10A solar charge controller that is needed in photovoltaic system to safely charge regulate and discharge of sealed lead acid battery through DC load. Solar charge controller is devices that regulate solar photovoltaic power and prevent overcharging, over discharging or overflow of current that reduces the lifespan, durability and performance of the battery. The12v/10A solar charge controller was constructed using variable resistor, re...

Wireless Power Transfer: Design and Implementation of a Wireless Charging Pad

The aim of this project is to shows the possibility of wireless power transfer through the design of a wireless charging pad. In this project write-up, the methodology and principle of operation is wireless power transfer through inductive couple, a feasible design is modelled accordingly. The inductive couple technique is used because it is the easiest method of wireless power transfer with high efficiency and large amount of energy transfer. This report showed the versatility in range of a...

THE IMPLEMENTATION OF ADAPTIVE MODULATION USING MATLAB AND FUZZY LOGIC INTERFACE SYSTEM

ABSTRACTThe rapid growth in the use of wireless communication in mobile network devices has made many engineers and researchers to start to look into ways to enhance data transmission either in form of voice, text, data, streaming multimedia, internet etc. Wireless Services that occur in real time require very little or no bit error during transmission in order for the receiver to get an intelligible information from the transmitting station. Whereas some services require more data to ...

Production of Methanol From Biomass

                                                               ABSTRACT         Biomass is organic materials that are made from plants and animals. Biomass stored alot of energy from the sun. Biomass is renewable sources of energy which can grow more such as trees and crops, and waste always exist. Example of this biomass may include wood, forage crops, manure and some garbage and alcohol fuels. The usable forms of en...

Production of Biolubricants for Oil Well Drilling Applications

Abstract A pyrolysis reactor was designed and fabricated for the production of bio-esters used in formulating green lubricants for the drilling industry. Samples of Tectona Grandis, Eucalyptus Torreliana, Jatropha Curcas leaf and Cornhusk were each pyrolysed in the reactor at 5000C. Bio-oil obtained was analyzed for their Density, Acid value, % FFA and Viscosity at ambient conditions.  Bio-oil was upgraded by esterification using Methanol and synthesized Silica Sulphuric Acid (SSA) a...

Effects of Post Harvest Variables on the Yield and Quality of Shea Butter

ABSTRACTA study on the effects of post- harvest variables on the yield and quality of Shea butter wascarried out. The Shea nuts acquired from villages were divided into five batches with avillage/uncontrolled sample. Each batch was boiled at different time ranges (0, 15, 30, 45 and60) minutes. Each batch was dried through an oven drying method. Also, each sample wasdivided   into   two   equal   parts   and   was   cooked&n...


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