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Browsing School of Electrical and Electronics Engineering by Title

Browsing School of Electrical and Electronics Engineering by Title

Now showing items 1-20 of 41

Analysis of Electromagnetic Field Radiation from a Rectangular Cavity-Backed Slot Antenna Using ADI-FDTD Method

Musyoki, Stephen; Ouma, Heywood A.; K’Onditi, Dominic B.O.; Nyaory, George M. (2012)

In this paper, a rectangular Cavity Backed Slot Antenna (CBSA) Model excited by a probe is investigated. The analysis is carried out using the Alternating Direction Implicit - Finite Difference Time Domain (ADI-FDTD) Method ...
Auto-resonant eniotron oscillator using a magnetron type cavity

Musyoki, Stephen; Yokoo, Kuniyoshi; Sato, Nobuyuki; Ono, Shoichi (1991)

In an ideal auto-resonant eniotron oscillator (ARPO), all the electrons are able to give almost all their kinetic energy to an electromagnetic wave, resulting in a conversion efficiency of nearly 100%. However, the electric ...
Auto-resonant peniotron amplifier with a down tapered DC magnetic field

Musyoki, Stephen; Yokoo, Kuniyoshi; Sato, Nabuyi; Ono, Shoichi (Taylor & Francis, 1990-02)

High efficiency operation of an auto-resonant peniotron amplifier operating with a down tapered DC magnetic field is discussed and the basic design concepts for a 200 GHz experimental prototype tube are described.
Biocontainment of PCBs on flat concrete surfaces and coprecipitation of PCBs and metals in boiler chemical cleaning wastewater by microbial carbonate precipitation

Okwadha, GDO (2010)

Some industrial equipment such as electric transformers and capacitors are located in vaults and substations on flat concrete surfaces. Due to accidents, normal routine maintenance or replacements, these equipments may ...
Biocontainment of polychlorinated biphenyls (PCBs) on flat concrete surfaces by microbial carbonate precipitation

Li, Jin; Okwdha, GDO (2011)

In this study, a biosealant obtained from microbial carbonate precipitation (MCP) was evaluated as an alternative to an epoxy-coating system. A bacterium Sporosarcina pasteurii strain ATCC 11859, which metabolizes urea and ...
Bit Error Rate Performance Analysis of a Wideband Code Division Multiple Access System Model in an Indoor Environment using Convolution Coding over Additive White Gaussian Channel

Musyoki, Stephen; Kibet, Philip; Ombongi, Filbert (Volume 3, Issue 5 October 2014, 2014)

The research entails the development of a WCDMA system model in an indoor environment that transmits data over an Additive White Gaussian Noise channel. In this environment the data rate is taken as 2Mbps. The performance ...
Casting of semi-solid cast iron slurry using combination of cooling slope and pressurisation

Muumbo, A; Nomura, H; Takita, M (2004)

A system developed at Nagoya University combining a cooling slope, gravity pouring and pressurisation was utilised to cast components from hypoeutectic cast iron in the semi-solid state. Investigation of resulting ...
Challenges of Implementing E-Learning in Kenya: A Case of Kenyan Public Universities

Tarus, John K; Gichoya, David; Muumbo, Alex M (2015)

In this paper, we discuss the challenges experienced by Kenyan public universities in implementation of e-learning and recommend possible solutions towards its successful implementation. In the last few years, most Kenyan ...
Colour and Nutrient Removal from Textile Waste Water Using an Enhanced Fluidised Bed Bioreactor

Nzila, C; Wambua, P; Githaiga, J; Tuigong, D; Kiriamiti, HK; Kiambi, S-L; Muumbo, A (2011)

Textile waste water contains an array of chemicals with different biodegradation characteristics that often presents chronic colour and nutrient removal problems. Conventional and advanced methods commonly applied to treat ...
Controlling waste in food processing using ultrasound level monitoring technology.

Hull, J. B; Muumbo, AM; Whalley, R (1995)
Design of a high power, 10 GHz auto-resonant peniotron amplifier

Musyoki, Stephen; Sakamoto, Keishi; Watanabe, Akihiko (1992)

The autoresonant peniotron amplifier is a suitable source of high power RF radiation because of its high gain, high power, high frequency and high efficiency operation features. In this report we present our simulation ...
Design of a high power, 2.75 GHz relativistic peniotron oscillator

Musyoki, Stephen; Sakamoto, Keishi; Watanabe, Akihiko (1992-10)

In the peniotron oscillator, the kinetic energy of relativistic electrons can be efficiently converted to an electromagnetic wave. This feature makes the peniotron a very attractive source of high power microwaves, which ...
Development of a Medical Expert System as an Expert Knowledge Sharing Tool on Diagnosis and Treatment of Hypertension in Pregnancy

Gudu, J; Gichoya, D; Nyongesa, P; Muumbo, A (2012)

This paper outlines the development a Medical Expert System for the diagnosis and treatment Hypertension in Pregnancy to be used in the Reproductive Health Division, at Moi Teaching and Referral ...
Development of a remote sensing methodology for analyzing shifting cultivation and grazing patterns in the semi-arid region of Kenya.

Wayumba, GO (1983)
Development of a Renewable Energy Database System for East Africa – Survey on Biogas Usage and Potency of Various Agricultural Bio-wastes in Kenya

Nzila, C; Muasya, R; Muumbo, A; Kiriamiti, K; Githaiga, J; Dewulf, J (2014)

Kenya being an agricultural based economy produces vast amounts of agricultural bio-waste such as maize/corn stalks, rice and wheat straws, tea and coffee waste, sugarcane, banana and barley residues, ...
E-Medical Consultation for Diagnosis and Treatment of Hyperten sion in Pregnancy: an Opportunity to achieve the 5 th Millennium Development Goal in Kenya

Gudu, Jael; Gichoya, David; Muumbo, AM; Nyongesa, Paul (2012)

This study sought to establ ish the challenges that the Reproductive Health Division (Hi gh Risk Pregnancy Clinic) at Moi Teaching and Referral Hospital based in Eldoret city, one of the two referral hospitals ...
The Effects of a Human Hand on a Wireless Mouse Antenna

Musyoki, Stephen; Konditi, B. O.; Njoroge, Dominic; Rainsford, K (2015)

In this paper, Finite Difference Time Domain (FDTD) method is used to analyze the effect of a human hand on a wireless mouse antenna. The need for this analysis is based on the fact that human tissues are dielectric in ...
Emittance measurement of high-brightness microbeams

Musyoki, Stephen; Ishizuka, Hiroshi; Nakahara, Yuriko; Kawasaki, Sunao; Shimizu, Hiroshi; Watanabe, Akihiko; Shiho, Makoto (Japanese Journal of Applied Physics, 1994)

Arrays of microtriodes have recently become available due to the development of microfabricated field-emission electron sources. Computer simulation has shown that the brightness of beams emitted by them is significantly ...
Evaluation of Surface Water Runoff from Fly Ash–Stabilized and Nonstabilized Soil Surfaces

Dombrowski, Frank J; Ramme, Bruce W; Okwadha, GDO; Kollakowsky, Dave (2010)

This study evaluated the constituent make up of simulated rainwater runoff from Class C fly ash–stabilized and nonstabilized clay soil using laboratory test pads to assess the potential for impacts to surface water from ...
Experimental and Numerical Investigation into Turbulent High Reynolds Number Flows Through a Square Duct with 90-Degree Streamwise Curvature - II Numerical Methods

Ondore, Faustin (2015-07-13)

A square duct with a 90-degree streamwise curvature is representative of complex flow domains. Such flow domains are encountered in the designs of fluids engineering systems, especially in the aerospace turbo-machinery ...

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