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Now showing items 591-600 of 1144
Containment Studies of Transgenic Mosquitoes in Disease Endemic Countries: The Broad Concept of Facilities Readiness
(University of Nairobi, 2018)
Genetic strategies for large scale pest or vector control using modified insects are not yet operational in Africa, and currently rely on import of the modified strains to begin preliminary, contained studies. Early ...
Scale And Diversity Of The Physical Technosphere: A Geological Perspective
(University of Nairobi, 2016)
We assess the scale and extent of the physical technosphere, defined here as the summed material output of the contemporary human enterprise. It includes active urban, agricultural and marine components, used to sustain ...
The Working Group on the Anthropocene: Summary of evidence and interim recommendations
(University of Nairobi, 2017)
Since 2009, the Working Group on the ‘Anthropocene’ (or, commonly, AWG for Anthropocene Working Group), has been critically analysing the case for formalization of this proposed but still informal geological time unit. The ...
Effects of Supplemental Irrigation on Crop Yields: Case Study Kales (Brassica Oleracea) Crop
(Journal of Ecological Engineering, 2020-02)
The aim of this study was to investigate the effects that supplemental irrigation (SI) has on Kale (Brassica Oleracea) crop yields as compared to wholly rain-fed crop. The experiments were conducted in Kieni, Central Kenya ...
Drug Resistance Mutations Among Antiretroviral-Treated Female Sex Workers In Nairobi, Kenya
(African Journal of Health Sciences, Volume, 2013-12)
Antiretroviral drug resistance remains an important and a growing challenge in HIV management as it almost
always lead to treatment failure. Sex workers face persistent exposures to the different HIV-1 variants and
in ...
Synthesis, structural assignments and antiinfective activities of 3-O-benzyl-carvotacetone and 3-hydroxy-2-isopropyl-5-methyl-p-benzoquinone.
(University of Nairobi, 2020)
In an attempt to synthesize carvotacetone analogues, new 3-O-benzyl-carvotacetone (10) and previously reported 3-hydroxy-2-isopropyl-5-methyl-p-benzoquinone (11) were synthesized from piperitone (7). In this work, we ...
On Local Linear Regression Estimation In Sampling Surveys
(2017-10)
A model-based survey is employed to estimate the unknown values of the survey variable, using the local linear regression approach. In particular, a local linear regression estimator in model-based surveys is studied. ...
The seismicity in Kenya (East Africa) for the period 1906–2010: A review
(University of Nairobi, 2014-01)
Kenya has had a seismic station since 1963 as part of the World Wide Standardized Seismograph Network (WWSSN). In 1990, the University of Nairobi in collaboration with GeoForschungsZentrum (GFZ) started to build up a local ...
Serotype and genetic diversity of human rhinovirus strains that circulated in Kenya in 2008
(2016)
Background
Human rhinoviruses (HRVs) are a well-established cause of the common cold and recent studies indicated that they may be associated with severe acute respiratory illnesses (SARIs) like pneumonia, asthma, and ...
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....