Engineering

Research Papers/Topics in Engineering

System Sizing Of Solar Energy Requirement For An “All-Direct Current” Stand-Alone Telecommunication System

ABSTRACTSolar photovoltaic (PV) energy has been widely used for decades especially where connection to a national grid is seldom possible and other sources such as fossil fuel and others are either unavailable or uneconomical. Solar PV energy owing to its free, natural availability and environmental friendliness has found demand for use in industries, homes and institutions. However, very little research has been carried out to precisely establish its effectiveness, reliability and adequacy. ...

Design And Analysis Of Microstrip Antenna For 2.4 Ghz Applications

ABSTRACTCommunication systems require development of low cost, low profile and minimal weight. Microstrip antennas (MSA) are capable of maintaining high performance over a wide spectrum. Technological trends have focused much effort on the design of the microstrip patch antennas. In this study, square, circular and rectangular patches were designed and analyzed using two different substrates. High Frequency Structure Simulator (HFSS) software was used to simulate, model and analyze the MSAs. ...

Analysis Of Microstrip Antenna Using Arbitrarily Shaped Patches Having Similar Surface Area

ABSTRACTMicrostrip patch antenna(MSA) has become very vital in communication system due to its attractive features such as its light weight, small size, low cost, low profile, ease of installation and its conformability to planar and non planar surfaces, when a particular mode and shape is selected. MSA are versatile in terms of resonant frequency, impedance, polarization and electromagnetic wave pattern. However, MSA have been found to suffer from relatively narrow bandwidths. The consumers ...

Student and Teacher Perceptions of Factors Influencing Students’ Performance in KCSE Mathematics in Tana River County, Kenya

ABSTRACTStudents’ performance in Kenya Certificate of Secondary Education (KCSE)mathematics in secondary schools has been poor for many years in Kenya,particularly in Tana River County. Despite the various attempts by the Ministry ofEducation to put in place measures such as in-servicing mathematics teachersthrough Strengthening of Mathematics and Sciences in Secondary Education(SMASSE) project, review of the syllabus and subsidizing fees for the students, theKCSE mathematics mean sco...

Design And Fabrication Of An Electronic System For Monitoring And Controlling Temperature, Light Illuminance And Humidity In A Greenhouse

ABSTRACTClimate uncertainties pose a challenge to the production of food to feed the growing billions on the globe. Climatic conditions can change abruptly ruining farming efforts and leading to food shortages. Greenhouses attempt to solve this problem by enclosing crops in a climatically controlled environment. Crop production in greenhouse environment has the advantage of obtaining reliable and continuous output throughout the year. Each greenhouse has distinct characteristics. Data on thes...

Graffiti Writing And Its Likely Influence On English Language Learning In Selected Secondary Schools In The Larger Laikipia East District, Laikipia County

ABSTRACT Graffiti takes the form of written language whose authorship always remains anonymous. It precisely refers to any wall writing, pictures and symbols or markings of any kind on any surface anywhere no matter what motivates the writer. Most graffiti are viewed as illegal or vandalism of property by those in authority. Secondary school students use graffiti as a form of communication when they feel other channels to express themselves, have been blocked by those in authority. This study...

Performance Of A Modified Vehicle Drive System In Generating Hydropower

ABSTRACT Micro hydropower generated electricity can function as an effective tool for rural development. One of the barriers to smooth implementation of community/village micro hydropower schemes in the country is lack of appropriate hydraulic turbines, thus making the site specific costs of micro hydropower rather high, hence not easily affordable by the rural communities. The purpose of the study was to investigate the use of a vehicle live axle-propeller shaft system to replace conventiona...

Design And Fabrication Of A Greenhouse Monitoring And Control System Based On Global System For Mobile Communication And Bluetooth

ABSTRACT Greenhouse technology should be embraced as a way of minimizing food insecurity in Kenya. The insecurity is brought about by climate uncertainties. Greenhouses have attempted to solve this problem by enclosing crops in a climatically controlled environment. Each greenhouse has distinct parameters. Data on these parameters need to be collected at regular intervals. Depending on the type of crop, these parameters need to be controlled within the specified limits to achieve the ma...

Design Optimization Of Municipal Solid Waste Incinerators Using Mathematical Modeling And Computer Simulation

ABSTRACTEnvironmental pollution caused by the Municipal Solid Waste (MSW) incinerators has raised concerns about the quality of incinerators and the incineration process in Tanzania. Engineers and Scientists in general have appreciated that the installation of functional incinerators will increase the incineration process efficiency. Among the methods to achieve this is the application of mathematical modeling for the incineration process. Literatures have showed that...

Design And Construction Of A Microcontroller-Based Human Audio Noise Monitoring And Control System

ABSTRACTAudio noise monitoring and control has been a subject of research for several decades. Researchers have developed audio noise monitoring systems which rely on computers, internet and mobile telephone services which are costly and bulky and whose output is not easy to associate with any medical or psychological effects of noise. Active noise control has been explored using digital signal processors and field programmable gate arrays which are more costly than microcontrollers. Complex ...

Optical And Electrical Characterization Of Cdxni1-Xs And Sb2S3 Thin Films For Photovoltaic Application

ABSTRACTThe demand for silicon in microelectronics has put a lot of strain on the availability and eventually high prices for silicon type of solar cells. In this work, nickel doped cadmium sulphide (CdxNi1−x S) was investigated. This material was used as a window layer, combined with antimony sulphide (Sb2S3) as an absorber layer in fabricating glass/ SnO2: F/CdxNi1−x S /Sb2S3 /C-Ag p-n junction solar cell. Thin films of CdX Ni1−XS (CdS: Ni) and Sb2S3 were prepared by CBD method on ord...

Relationship Between Field Work And Performance In The Teaching And Learning Of Geography In Kiminini Division Trans-Nzoia County, Kenya

ABSTRACTThe purpose of the study was to investigate the relationship between field work and performance in the teaching and learning of geography in Kiminini Division, Trans-Nzoia County. The performance of geography in the National Examination within the Division has persistently been declining over the years yet a national school in the division that has judiciously used field work as noted from the survey did post positive deviation in the last three KCSE results. It is worth noting that t...

Effects Of English Language On Students’ Performance In Teaching And Learning Of Mathematical Modelling At Junior Secondary School Level In Bauchi State, Nigeria

ABSTRACTEnglish as a language of instruction is recommended in the Nigerian mathematics classroom, it is also a second language where both teachers and students necessarily use at home to communicate. The study aimed at establishing the effect of English as a second language in teaching and learning of mathematical modellling at junior secondary school level in Nigeria. The junior secondary two learners in Nigeria are second language students who learn mathematics and particularly word proble...

Design And Fabrication Of A Computer-Based Fingerprint Security System For Restricted Access Control

ABSTRACTThe access to a restricted area within a premise is normally done through a manual system of keys and locks. This has been automated through the use of personal identification number (PIN) or passwords and smartcard technology. However, such systems are faced with a number of limitations such as losing a smartcard, forgetting a PIN, duplication of keys and impersonation. Thus, the use of an authentication system such as biometric verification techniques has become an effective alterna...

Design And Simulation Of A Finite State Machine Suitable For Micro-Code Execution

ABSTRACTDigital processors are built from very large scale integration circuits and the software to design them is only available to the manufacturers themselves. There is a need to design a central processing unit using large, medium and small scale integration circuits which can be used as a teaching aid in computer architecture and design. In this thesis a simulation model of a digital processor is designed using arithmetic logic unit, control unit and registers as building blocks with the...


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