Department of Science, Technology and Engineering: Recent submissions
Now showing items 21-35 of 35
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The effectiveness of coccinellids as natural enemies of aphids in maize, beans and cowpeas intercrop
(2012)Abstract: A field study was conducted in Busia district of Kenya to elucidate the dynamics of ladybirds in mixed stands of maize, beans and cowpeas to determine their efficacy as sole control measures for Aphids. Maize, ... -
Effects of static electromagnetic fields at 24 hours incubation on the germination of rose coco beans (phaseolus vulgaris)
(2009-05)This study evaluates the percent germination of Rose coco beans (Phaseolus vulgaris L.) seeds, when exposed to static electromagnetic fields under laboratory conditions incubated for 24 h. This can be replicated in the ... -
Optical characterization of atmospheric aerosols via airborne spectral imaging and self-organizing map for climate change diagnostics
(2018-08-03)Self-Organizing Map (SOM) analysis is used to perform optical characterization of both Aerosol Optical Depth (AOD) and Ångström Exponent (ÅE) retrieved from Moderate-resolution Imaging Spectroradiometer (MODIS) in relation ... -
Thermodynamic properties of yttrium based cuprate due to electron-cooper pair interaction using BVT
(Open Access Library Journal, 2018-10-15)Since the discovery of high temperature superconductivity (HTSC), there have been varied results concerning the high pairing energy in the unconventional superconductivity. In an attempt to unearth the mechanism behind the ... -
Trend analysis of aerosol optical depth and angström exponent anomaly over East Africa
(scientific Research Publishing, 2017-10-31)Trend analysis of atmospheric aerosols enhances confidence in the evaluation of both direct and indirect effects of aerosols on regional climate change. To comprehensively achieve this over East Africa, it’s important to ... -
Sun-photometric study and multivariate analysis ofaerosol optical depth variability over some representative sites of the Kenyan atmosphere
(International Journal of BioChemiPhysics,, 2015-12-01)The goal of this study was to explore the temporal-spatial characteristics of aerosol optical depth (τ)over the Kenyan urban (Nairobi-1°S, 36°E), rural (Mbita-0°S, 34°E) and maritime (Malindi-2°S, 40°E) atmospheres using ... -
Aerosol optical depth and precipitation rate projections over east africa utilizing self organizing map
(The International Journal Of Science & Technoledge, 2017-03-01)Assessment of future aerosols impacts on both regional and global climate change requires a comprehensive projection tool that reliably provides information on aerosol evolution characteristics with high fidelity. In the ... -
Long term assessment of aerosol radiative forcing over selected sites of East Africa
(scientific Research Publishing, 2018-03-08)Atmospheric aerosols have contributed to radiative forcing through direct and indirect mechanisms. Aerosol effects are important in computing radiative forcing estimates for the past, current and future climate. In this ... -
Estimation of radiative forcing due to aerosols over selected sites in Kenya
(Kenya Meteorological Society : Journal of Meteorology and Related Sciences, 2013-01-01)Variations in the radiative characteristics of aerosols can be used to quantify their effects on climate. This study evaluated the temporal-spatial variability of aerosol radiative characteristics at λ = 440 nm, λ = 675 ... -
Investigation of radiative characteristics of the Kenyan atmosphere due to aerosols using sun spectrophotometry measurements and the COART model
(Taiwan Association for Aerosol Research : Aerosol and Air Quality, 2013-01-01)Variations in the radiative characteristics of aerosols can be used to quantify their effects on climate. This study evaluated the temporal-spatial variability of aerosol radiative characteristics at λ = 440 nm, λ = 675 ... -
Effect of duo fermion spin on the specific heat and entropy of a mixture of helium isotopes
(Journal of Multidisciplinary Engineering Science and Technology (, 2018-10-01)Spin normally determines the character, rate of collision and subsequently the properties of ultracold systems. This study investigated the effect of double spin degeneracy on the thermodynamic properties of Helium-3 and ... -
Internal energy of a grand canonical ensemble of a mixture of helium isotopes with duo-fermion spin degeneracy
(Centre for Info Biotechnology-IJPMS, 2015-12-01)We have considered a system consisting of a mixture of helium isotopes 3He-4He interacting weakly in pairs. The partition function of the system with duo-spin and varying number of bosons and fermions is developed to bring ... -
EDXRF spectroscopic elemental analysis for efficacy of Kibabii University sewage treatment System
(Open Access Library Journal, 2018-10-18)Elemental analysis of sewage effluents in Kibabii sewage treatment system was achieved via Energy-Dispersive X-Ray Fluorescence (EDXRF) spectroscopy with the aim of assessing the efficacy of the treatment system. Concentrations ... -
Specific heat and entropy of a three electron model in bismuth based cuprate superconductor
(Science Publishing Group : World Journal of applied physics, 2018-06-11)A theoretical study considering Bi2201, Bi2212 and Bi2223 bismuth based cuprates whose critical Temperatures (TC) are 20K, 95K and 110K with one, two and three CuO2 planes respectively; based on a three electron model in ... -
Predicting daily streamflow in ungauged rural catchments: the case of Masinga catchment, Kenya
(Taylor&Francis, 2007)Access to daily streamflow data at the catchment scale, is a central component of many aspects of water resources and water quality management. However, the majority of river reaches in many catchments in Kenya are ...