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Browsing College of Engineering and Technology (COETEC) by Issue Date

Browsing College of Engineering and Technology (COETEC) by Issue Date

Now showing items 41-60 of 302

Characterisation of antimalarial compounds from plants used in traditional health practices in Lake Victoria basin

Nyangasi, Leah (2014-04-25)

Malaria, transmitted by bites of infected female anopheline mosquitoes, is an infectious disease caused by parasitic protozoa of the genus Plasmodium. The parasite infects human and insect hosts alternately. It remains ...
A Study into Steel Processing and Recycling Industry in Kenya

Machira, Johnson Kariuki (2014-04-25)

The main objectives of the study were to determine the consumption patterns of steel and availability of iron ore, and establish the e ciency of the Kenyan steel industry. Currently, most of the information available is ...
Use of Washed Quarry Dust in the Treatment of Industrial Effluents: Case Study of Electroplating Industry

Mungathia, Julius Kalionci (2014-04-29)

This study records laboratory scale experiments to test the efficiency of washed quarry dust in the removal of heavy metals such as zinc and copper from wastewater of electroplating industry, before safe disposal into ...
Developing a sustainable water management plan for Ruiru, Thiririka and Ndarugu subbasins in Kenya using WEAP Developing a sustainable water management plan for Ruiru, Thiririka and Ndarugu sub basins in Kenya using EAP

Thubu, James Wasi (2014-05-07)

Ruiru, Thiririka and Ndarugu Sub-Basins have been subjected to intensive agricultural, industrial activity and population pressure. The growing demand over a limited endowment of water has generated competition between ...
Effect of Minor Elements on Castability, Microstructure and Mechanical Properties of Recycled Aluminium Alloys

Mose, Bruno Robert (2014-05-07)

As part of the wider effort to improve the performance of cast aluminium alloys, this research set out to investigate the effect of minor elements (Fe, Mn, Cr, Sr, Sb and Ti-B based grain refiners) on castability (fluidity ...
Design and Analysis of Neural Fuzzy Based DC-DC Converter Controller Optimized With Swarm Intelligence Matui

Matui, Kanai Michael (2014-05-07)

The use of DC-DC switched-mode power converters is continuously growing both in power electronics products and systems, e.g. in telecommunication applications, commercial grid systems among others. In a DC-DC converter ...
Influence of the Physical Characteristics of Urban Open Spaces on Residents Perception and Usage: A Case of ‘Old Town’ Mombasa.

Makdii, Alfayo Uruji (2014-05-07)

‘Old Town’ Mombasa is a densely built up historic area with inadequate public open spaces for recreation. Nevertheless, even the few existing open spaces are profoundly underutilized by the residents for recreational ...
Capture of Industrial Carbon Dioxide Emission by Wet Scrubbing

Ndiritu, Hiram Muriithi (2014-06-11)

analysis has shown that carbon dioxide forms between 13 to 15% of the combustion exhaust gases that are released directly into the atmosphere. The release of this gas into the atmosphere is chiey responsible for increased ...
Optimization of Performance of Bio-ethanol Gel Cookstove

Oketch, Peter Obara (2014-07-28)

Approximately one-third of the world’s population uses traditional biomass for cooking using inefficient cookstoves. The use of these forms of energy is associated with environmental as well as human health impacts. The ...
Speed Control of Single-Phase Induction Motor using Fuzzy Logic Technique with Magnetostrictive Amorphous Wire Speed Sensor

Muhia, Asaph Mbugua (2014-08-08)

Speed control of Induction Motors has been widely carried out with the aim of saving on energy, cost reduction and performance improvement of the motors and various methods have been used. Scalar control method which ...
testing upload

ondiek, lamech (2014-10-22)
Optimization of Ultrasonic Waves in an Acrylic Pipe Powder Transport System

Evan Murimi, Evan Wanjiru (2014-10-31)

The transport of powder materials is an important aspect of process engineering. Various industries such as the food, chemical, pharmaceutical, coating, information and telecommunication industries have set a high demand ...
Continuous Improvement Model for Small Scale Manufacturers in Kenya

Kithinji, Zachary Mwithaga (2014-12-19)

Continuous Improvement (CI) is a quality management philosophy that approaches the challenge of product and process improvement as a never ending process of achieving small wins. Quality management (QM) cannot be assured ...
Incidence and Subtypes of Human Metapneumovirus among Selected Rural and Urban Populations of Kenya, 2006 - 2009

Omballa, Victor Oduor (2014-12-19)

Fluoride in water in some parts of Eritrea is above the WHO guideline of 1.5 mg/l. The Keren community suffers dental and skeletal fluorosis as a result of being exposed to water with high fluoride content. A survey ...
Influence of Near Infrared Reflection and Evaporative Cooling on Mango Fruit Storage

Korir, Meshack Kipruto (2015)

Mango (Mangifera indica L.) fruit is valuable in Kenya due to its nutritive and economic value. However, at least 40 to 45% of mango fruit is lost during postharvest handling primarily due to inadequate availability of ...
Characterization and Variability of Bending and Fatigue Properties in Reinforcing Steel Bars Made From Scrap

NYAMU, DANIEL MARINGA (2015)

The variability of mechanical properties of reinforcing steel bars manufactured from scrap metals by local manufacturers in Kenya was investigated in this research. The key properties were bending and fatigue. Information ...
Public Procurement System and its Influence on the Building Contract Performance during Project Implementation: The Case of Nairobi-County

Kiiru, Harrison Wachira (2015)

Public procurement system account for significant percentage of GDP and has a direct impact on Kenya economy. Indeed, the Kenya government has used public procurement system to meet development objectives such as the ...
An Investigation of the Sustainability of Steel Construction Technologies in Mobile Telecommunication Industry in Kenya

Otieno, Maurice Akech (JKUAT, 2015)

The growth in Mobile Telecommunication sector has been rapid to the extent that by the end of 2011, there were 6 billion mobile subscriptions worldwide. This is an equivalent of 87% of the world’s population. The rapid ...
Green plants’ extracts’ potential as concrete admixtures

Chege, John Githakwa (2015)

In Kenya, the rate of construction of building structures for homes falls short of what is required to meet the demand. High cost of buildings is a major contributing factor to this unfortunate condition. Cost of building ...
Assessment of stone dust in production of high performance Concrete

Cheruiyot, Joffrey (2015)

This study evaluated the suitability of stone dust in the design and production High Performance Concrete (HPC). Stone dust from the quarry was sampled, tested and used to produce HPC mix. Structural design was done using ...

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