Faculty of Engineering, Built Environment & Design (FEng / FBD): Recent submissions
Now showing items 61-80 of 839
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Radioactivity And Dose Assessment Of Rock And Soil Samples From Homa Mountain, Homa Bay County, Kenya
(University of Nairobi, 2012-11-28)The in situ measured average outdoor ab sorbed dose rate in air was found to vary from 108.4 to 1596.4 nGy h -1 at Homa Mountain area in southwestern Kenya. Rock and soil samples collected gave average values of ... -
Approaches to education and training for kenya's nuclear power program
(University of Nairobi, 2014-05-16)1.Review of status and development of E&T for the nuclear power program in Kenya 2. Review of challenges in nuclear E&T, and the initiatives being undertaken to mitigate them • Recommendatio ... -
Semester two.
(University of Nairobi, 2014) -
Road Safety Research In Africa . Compendium Of Papers. Second African Road Safety Congress, Addis Ababa, October 16-20, 1989. Joint Economic Commission For Africa And Oecd Congress
(University of Nairobi,, 1989)This paper attempts to review road safety research in Africa and makes recommendations for its strengthening in order to cope with the road accident situation in Africa. The studies reviewed were those found in the literature ... -
Development Of High Strength Lime Pozzolana Pastes
(University of Nairobi,, 2014)Non - hydraulic hydrated lime is a binder obtained by heating rocks, sand or shells containing calcite to temperature between 900 °C an d 950 °C to produce CaO, which is then slaked with water to produce Ca(OH) 2 . It sets ... -
Source apportionment and seasonal variation of PM2.5 in a Sub-Sahara African city: Nairobi, Kenya
(University of Nairobi, 2014)Sources of airborne particulate matter and their seasonal variation in urban areas in Sub-Sahara Africa are poorly understood due to lack of long-term measurement data. In view of this, airborne fine particles matter ... -
The Challenges of Rural Electrification in Sub-Saharan Africa
(University of Nairobi, 09-06-05)This paper presents challenges of rural electrification. The main technical challenge of rural electrification programme to the power engineer is therefore the designing of an electrical distribution system for a dispersed ... -
A Wavelet Based Image Watermarking Scheme With A CDMA/Hadamard Embedding Technique
(University of Nairobi, 15-02-07)A new blind digital image watermarking scheme that employs a Hadamard matrix to spread the CDMA watermark in selected DWT coefficients in a gray-level cover image is proposed. The coefficients are obtained from the 1- level ... -
A Digital Image Watermarking Scheme Based On Localised Wavelet Coefficients' Dependency
(University of Nairobi, 25-09-09)A wavelet based robust image watermarking scheme in which a binary image is embedded in the horizontal and vertical quadrants of a wavelet transformed image is proposed. The algorithm exploits the inter-coefficients ... -
An Image Watermarking Method Based On The Singular Value Decomposition And The Wavelet Transform
(University of Nairobi, 28-09-07)A robust image watermarking scheme in which a binary image is embedded in the singular values of selected DWT blocks in the horizontal and vertical sub-bands of a 1-level decomposition of a gray-scale image is proposed. ... -
A spectral Subtraction Method for Noise reduction in Speech Signals
(University of Nairobi, 27-09-96)A noise suppression algorithm for enhancing speech signals corrupted by additive white Gaussian noise is presented in this paper. The algorithm is based on the subtraction of estimated noise spectrum from the noisy speech ... -
An Improved Enhancement Of Degraded Binary Text Document Images Using Morphological And Single Scale Retinex Operations
(University of Nairobi, 2012-07)This paper proposes a novel enhancement algorithm for degraded binary document images captured using a low end cell phone camera. The algorithm starts with colour to grey scale conversion followed by contrast stretching. ... -
A Colour Image Watermarking Technique Resistant To Affine Geometric Attacks
(University of Nairobi, 2013-09)This paper presents a colour image watermarking scheme resistant to affine geometric distortions. The technique involves embedding of the watermark in the host image in the Discrete Cosine Transform (DCT) domain in a ... -
A geometric attack resistant image watermarking scheme based on invariant centroids
(University of Nairobi, 2007)A digital image watermarking scheme that uses invariant centroids to detect and correct geometric attacks is proposed. The centroids are determined by computing a convergent geometric moment of a circular region of a ... -
Speciation of particulate carbonaceous species at an urban-background site in Nairobi, Kenya.
(University of Nairobi, 2010)Tropospheric aerosols have adverse implications on human health, climate, and visibility. Particles in combustion source emissions have complex physical and chemical characteristics. They regularly contain Polycyclic ...
