Faculty of Science Engineering and Technology: Recent submissions
Now showing items 141-160 of 240
-
Power spectral analysis and edge detection of magnetic data of Migori greenstone belt, Kenya.
(2020-04)With the continuous extraction of minerals in Migori greenstone belt, exploration is currently evolving from surface based exploration to subsurface exploration. This necessitates a good understanding ... -
Study of Temperature and UV wavelength Range Effects on degradation of Photo Irradiated polyethylene films using DMA
(2011-06-09)Plastic bags mostly made of polyethylene (PE) cause pollution as solid waste due to their non-degradability nature. Initiation of a degradative process by enhanced photo-oxidation is a possible method for an accelerated ... -
Study of Humidity and UV wavelength effects on degradation of photo irradiated polyethylene films using DMA
(2012-03-12)Plastic bags, mostly made of polyethylene, cause pollution as solid waste due to their nondegradable nature. Accelerated degradation, as a solution to mitigate the menace, can be achieved through moisture enhanced photolysis. ... -
Determination Of The Density And The Damping Properties Of Polyethylene (Pe) And Polylactic (Pla) Films Using Dma
(2013-08)Damping which is an effect that tends to reduce the amplitude of oscillations in an oscillatory system is significant in components under high dynamic loads especially in general mechanical engineering. In this study, ... -
UV Absorption and dynamic mechanical analysis of polyethylene films
(2014-12)Photooxidative processes that lead to chain scission and chain linking in polymers play an important role in polymer degradation. These processes are induced by both ultraviolet (UV) and visible light absorption. The ... -
Reflectance, Transmittance and Absorptance of HDPE, LDPE, Glass and Sand Layer Used in a SAH
(2014)The total Infra-red (IR) transmission of polymer films is a very important property in engineering, which determines their suitability for a specific application at a given temperature level. Aiming to investigate the ... -
Polylactic acid (PLA) viscoelastic properties and their degradation compared with those of polyethylene
(2015-12)Polyethylene (PE) films are widely used in packaging. PE is a thermoplastic manufactured from nonrenewable petroleum resources. Due to its non–biodegradability, its films have posed serious pollution problems e.g. visual ... -
The role of academia and industry in nurturing women in physics in Kenya
(2015-12-31)The authors look at some of the primary initiatives taken by the government, academia, and industry to nurture the goals and dreams of Kenyan women physicists. They discuss key transformative lines of progress as evidenced ... -
First-Principle investigation of the structural, electronic and magnetic properties of Co2VIn and CoVIn Heusler compounds
(2017-01-05)Investigation of the structural, electronic and magnetic properties of full-Heusler Co2VIn as well as half-Heusler CoVIn Cobalt based Heusler compounds using density functional theory (DFT) leads to the general conclusion ... -
Perpendicular magnetic anisotropy in nearly fully compensated ferrimagnetic Heusler alloy Mn0.75Co1.25VIn: An ab initio study
(Elsevier, 2017-11)First principles calculations are reported on perpendicular magnetic anisotropy (PMA) in nearly fully compensated ferrimagnetic Heusler compound Mn0.75Co1.25VIn. The structural, electronic and magnetic properties of ... -
Structural, Electronic and Magnetic Properties of the Heusler Alloy Mn₂VIn: A Combined DFT and Experimental Study
(2017-12)Structural, electronic and magnetic properties of the Heusler alloy Mn₂VIn have been investigated using the density functional theory and experimental techniques. Unlike many other Heusler compounds, Mn₂VIn is not predicted ... -
Perpendicular magnetic anisotropy in Mn2VIn (001) films: An ab initio study
(2017-12-07)First principles study of the magnetic anisotropy of Mn2VIn (001) films show perpendicular magnetic anisotropy (PMA), which increases as a function of the thickness of the film. Density functional theory (DFT) as implemented ... -
Shell-ferromagnetism and decomposition in off-stoichiometric Ni50Mn50–xSbx Heuslers
(AIP Publishing, 2019-01-28)Off stoichiometric Heuslers in the form Ni50Mn50−xZx, where Z can be a group 13–15 element of the periodic system, decompose at about 650 K into a ferromagnetic full Heusler Ni50Mn25Z25 and an antiferromagnetic Ni50Mn50 ... -
User’s perception on ICT adoption in High schools
(2012)Information Communication Technology (ICT) plays a crucial role in the effectiveness, efficiency and service delivery of any institution. ICT has also been credited with the potential to integrate world economies thus ... -
Assessment of ICT Infrastructure on ICT Adoption in Educational Institutions
(2013-06)Globalization and liberalization have facilitated intensive business competition which in turn has increased the need for adoption of new technologies to increase the efficiency in service delivery. ICT has wide application ... -
Effects of Auxin and Source of Explants on Callus Induction of Tropical Maize
(2012)Induction of callus from explants is a critical process in regeneration, micropropagation and transformation of plants. Formation of callus from plant tissues on culture is affected by different factors. This study sought ... -
Enhanced Utilization of Biotechnology Research and Development Innovations in Eastern and Central Africa for Agro-ecological Intensification
(Springer, 2014-07-16)The Association for Strengthening Agricultural Research in Eastern and Central Africa (ASARECA) through its Agrobiodiversity and Biotechnology Programme is enhancing the utilization of biotechnology research and development ... -
Occurrence and abundance of plant parasitic nematodes in cabbage-based cropping systems in Kenya.
(2014-10)A survey was conducted to determine the incidences of plant parasitic nematodes (PPN) and factors enhancing population build-up in cabbage (Brassica oleracea L. var capitata)-based cropping system in selected agro-ecological ... -
Effector gene vap1based DGGE fingerprinting to assess variation within and among Globodera species and populations.
(2019-11-12)Population-level genetic tools to study the epidemiology of potato cyst nematodes (PCN) are needed to evaluate their adaptive potential and validate management strategies. The effector gene vap1 is essential in early ... -
Reproduction of Globodera pallida on tissue culture-derived potato plants and their potential use in resistance screening process.
(2019-06-17)Globodera pallida infestation on potato is responsible for huge yield losses globally. Screening of potato germplasm for resistance to the nematode at the early stages of a breeding programme can significantly enhance ...