University of Embu Repository: Recent submissions
Now showing items 181-200 of 3332
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Distribution, abundance and natural enemies of the invasive tomato leafminer, Tuta absoluta (Meyrick) in Kenya
(cambridge university press, 2021-05-17)Tuta absoluta (Meyrick) has become a serious menace to sustainable production of tomato in Kenya. A survey was conducted between April 2015 and June 2016 to determine its distribution, abundance, infestation, and damage ... -
MODELING DISPROPORTIONAL EFFECTS OF EDUCATING INFECTED KENYAN YOUTH ON HIV/AIDS
(journal of biological systems, 2020)We formulate an age and sex-structured deterministic model to assess the effect of increasing comprehensive knowledge of HIV/AIDS disease in the infected Adolescent Girls and Young Women (AGYW) and, Adolescent Boys and ... -
Modeling the effects of insecticides resistance on malaria vector control in endemic regions of Kenya
(Elsevier Ltd., 2018-12)We present a model to investigate the effects of vector resistance to control strategies. The model captures the development of resistance as well as loss of resistance in mosquitoes and how these affect the progress in ... -
Evidence-based modeling of combination control on Kenyan youth HIV/AIDS dynamics
(plos one, 2020-11-17)We formulate a sex-structured deterministic model to study the effects of varying HIV testing rates, condom use rates and ART adherence rates among Adolescent Girls and Young Women (AGYW) and, Adolescent Boys and Young ... -
A Mathematical Model of Contact Tracing during the 2014–2016 West African Ebola Outbreak
(MDPI, 2021-03-12)The 2014–2016 West African outbreak of Ebola Virus Disease (EVD) was the largest and most deadly to date. Contact tracing, following up those who may have been infected through contact with an infected individual to ... -
Modeling the Effect of HIV/AIDS Stigma on HIV Infection Dynamics in Kenya
(springer, 2021-03-15)Stigma toward people living with HIV/AIDS (PLWHA) has impeded the response to the disease across the world. Widespread stigma leads to poor adherence of preventative measures while also causing PLWHA to avoid testing and ... -
Effect of Loan Repayment on Financial Performance of Deposit Taking SACCOs in Mount Kenya Region
(International Journal of Innovation and Applied Studies, 2015-03)This study sought to explore the effect of Loan Repayment on financial performance of deposit taking SACCOs in Mount Kenya Region. The target population was all the thirty licensed deposit taking SACCOs in Mount Kenya ... -
Extension-Market Linkages on Banana Commercialisation Among Smallholder Farmers in Meru Region, Kenya
(Journal of Agricultural Extension, 2022-01)The study examined the effect of extension-market linkages on banana commercialisation among smallholder farmers in the Meru region, Kenya. The study sampled 400 farmers from a target population of 288,802 from the Meru ... -
Determinants of Participation of Smallholder Farmers in Weather Index Insurance in Embu County, Kenya
(Journal of Agricultural Extension, 2021-07)The study examined how multiple factors influence participation of farmers in Weather Index Insurance WII in Embu County, Kenya. Data wer e collected from a sample of 401 smallholders following multi stage sampling technique ... -
Factors Influencing Adoption of Improved Cultivars of Macadamia (Macadamia spp.) among Small-Scale Farmers in Embu County, Kenya
(Journal of Agricultural Extension, 2021-10)The study investigated the factors influencing adoption of improved cultivars of macadamia (Macadamia spp.) among small-scale farmers in Embu County, Kenya. Data was collected from a sample of 384 small-scale farmers obtained ... -
Factors Affecting Multiple Climate Change Adaptation Practices of Smallholder Farmers in lower Eastern Kenya
(Journal of Agricultural Extension, 2021-10)The study investigated the socioeconomic and institutional factors influencing uptake of multiple climate change adaptation practices among smallholder farmers in lower Eastern Kenya. Multistage sampling procedure was used ... -
Determinants of Farmers’ Knowledge on Soil and Water Conservation Technologies in Dry Zones of Central Highlands, Kenya
(Journal of Agricultural Extension, 2021-10)This study ascertained the socioeconomic determinants of farmers’ knowledge on soil and water conservation technologies in Dry zones of Central Highlands of Kenya involving 400 farming households. Results showed that the ... -
The hybrid Cramer-Rao bound of direction finding by a uniform circular array of isotropic sensors that suffer stochastic dislocations
(Acoustical Society of America, 2017-11-15)Consider azimuth-elevation direction finding by a uniform circular array of isotropic sensors. In the real world, the sensors may dislocate from their nominal positions. These dislocations could be modeled as random variables ... -
Hybrid Cramer-Rao bound for near-field source localization using a spatially spread acoustic vector sensor
(Acoustical Society of America, 2019-03)This presentation characterizes the source-localization precision obtainable via "received signal strength indication" (RSSI) based on data from a tri-axial velocity sensor and a spatially separated pressure sensor. That ... -
A Centrosymmetric Array Comprising a Horizontal Uniform Circular Subarray and a Vertical Uniform Linear Subarray—Its Design in Reference to Its Direction-Finding Cramér–Rao Bound.
(IEEE, 2021-06)Azimuthal centrosymmetry in an array grid is typically associated with arrays that are circular, concentric, cylindrical, spherical, or hemispherical. However, a recently proposed alternative combines an azimuthal circular ... -
On the Performance of L- and V-Shaped Arrays of Cardioid Microphones for Direction Finding
(IEEE, 2021-01-15)The L-shaped and V-shaped arrays of first-order cardioid microphones for direction finding are presented in this paper. A comparative study of the direction of arrival estimation performance of the arrays was carried out ... -
Three-dimensional dislocations in a uniform linear array's isotropic sensors-Direction finding's hybrid Cramér-Rao bound
(Acoustical Society of America, 2020-05)The linear array’sone-dimensional spatial geometry is simple but suffices forunivariate direction finding, i.e., isadequate for the estimation of an incident source’s direction-of-arrival relative to the linear ... -
Political Environment and Implementation of Public Private Partnership Infrastructure Development in Kenya
(European Scientific Journal, 2019-07)Public Private Partnership (PPP) is a long term agreement between the public and private sector where risks and rewards are shared in developing a public facility. Private sector play a monumental role in bridging ... -
Comparing the “Rim” Versus the “Filled” Rectangular Array Grids—Their Direction-Finding Cramér-Rao Bounds
(IEEE, 2018)A rectangular array of sensors is often used in direction finding, due to the geometric regularity in its spatial rectangular grid. The sensor positions may be confined to the rectangle's perimeter (as in a “rim” array), ... -
Acoustical Direction Finding using a Bayesian Regularized Multilayer Perceptron Artificial Neural Networks on a Tri-Axial Velocity Sensor
(IJMEC, 2020-01)A two-dimensional direction-of-arrival estimation scheme based on Bayesian-regularized (BR) Multilayer Perceptron (MLP) artificial neural network (ANN) is developed around a unit acoustic vector sensor (AVS). The AVS ...