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Now showing items 31-40 of 87
Controlled Texturing of Aluminum Sheet for Solar Energy Applications
(University of Nairobi, 2015)
Aluminum sheets were polished to reduce ruggedness and then textured in varying acid-ethanol
concentration etchant to form pores. The textured surface was characterized structurally by using
X-ray diffraction (XRD)which ...
Molecular Epidemiology of Plasmodium falciparum Malaria Outbreak, Tumbes, Peru, 2010–2012
(2015)
During 2010–2012, an outbreak of 210 cases of malaria occurred in Tumbes, in the northern coast of Peru, where no Plasmodium falciparum malaria case had been reported since 2006. To identify the source of the parasite ...
Adoption of Enterprise Resource Planning Systems in Kenya: A Case of Selected Manufacturing Firms in Nairobi Metropolitan
(University of Nairobi, 2015)
Although the manufacturing sector in Kenya faces low productivity levels, stiff competition and high production
costs, firms are still using inefficient technology. Enterprise Resource Planning (ERP) system can ...
Analysis of the temporal evolution of total column nitrogen dioxide and ozone over Nairobi, kenya using OMI Measurements.
(University of Nairobi, 2015-06-25)
Concurrent measurement and analysis of Nitrogen dioxide (NO2)and Ozone (O3) are essential for improved understanding of ozone distribution. This study sought to analyse the temporal evolution of total column NO2 and O3 ...
Structural and Optical Characterization of Tin Oxide Codoped with Aluminum and Sulphur
(2015)
Thin films of Tin oxide co-doped with 28at%Aluminum and varied concentration of Sulphur were prepared on 1mm thick, 1 × 1 cm2 glass substrates at 470℃ by spray pyrolysis technique. Films were produced from 2.0 M solution ...
Modeling returns and unconditional variance in risk neutral world for liquid and illiquid market.
(University of Nairobi, 2015)
This article seeks to model daily asset returns using log-ARCH-Lévy type model which is expected to reproduce most of the stylized features of financial time series data (such as volatility clustering, leptokurtic nature of log returns, joint covariance structure and aggregational Gaussianity) that are empirically found in different types of market. In addition, unconditional variance of daily log returns in risk neutral world of different conditional heteroscedastic models is derived. A key observation is that liquid markets and illiquid market may not have the same underlying dynamics. For instance empirical analysis based on S&P500 index log returns as a liquid market do not have autoregressive part in their first moments while in Nairobi Securities Exchange NSE20 index there is strong presence of autoregressive dynamics of order three, i.e. AR(3). Higher moments of both markets are serially correlated....
Experimental investigation on performance, emission and combustion characteristics of croton megalocarpus biodiesel blends in a direct injection diesel engine
(University of Nairobi, 2015-01-01)
The emission, performance and combustion characteristics of croton biodiesel blends were tested in a direct injection (DI) single
cylinder four stroke diesel engine. The physico-chemical properties of the biodiesel blends ...
Modelling an Institutional Mobile Learning Readiness Analyser
(University of Nairobi, 2015)
Due to the affordability, ease of use and availability of mobile devices, many people in Africa and developing countries have acquired at least a mobile device. The penetration of mobile devices places many learning ...
Antiplasmodial and cytotoxic activities of the constituents of turraea robusta and turraea nilotica
(University of Nairobi, 2015-08)
Ethnopharmacological relevance
Turraea robusta and Turraea nilotica are African medicinal plants used for the treatment of a wide variety of diseases, including malaria. The genus Turraea is rich in limonoids and other ...