Faculty of Science & Technology (FST): Recent submissions
Now showing items 461-480 of 4283
-
Anti-cancer activities of crude extracts from medicinal plants moringa oleifera lam and rauwolfia caffra against selected cancer cell lines
(University of Nairobi, 2016)The current study was undertaken to validate the traditional use and determine the safety profiles of Moringa oleifera and Rauwolfia caffra used in Kenya to manage tumors and related ailments. This was achieved by ... -
Variability of surface exudates of dodonaea angustifolia l.F, antioxidant and antiplasmodial activities of the compounds
(University of Nairobi, 2016)Dodonaea angustifolia L.f is a medicinal plant used in the Kenyan traditional system of medicine to cure human diseases. The secondary metabolites present in the surface exudates, showed phytochemical diversity of this ... -
Antibacterial activity and structure-activity relationships of a panel of 48 compounds from Kenyan plants against multidrug resistant phenotypes
(University of Nairobi, 2016)In the current study forty eight compounds belonging to anthraquinones, naphthoquinones, benzoquinones, flavonoids (chalcones and polymethoxylated flavones) and diterpenoids (clerodanes and kauranes) were explored for their ... -
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 ... -
Cloud Computing: Transforming Medium and High Tech Industries in Kenya
(University of Nairobi, 2016)Cloud Computing provides novel perspectives in internetworking technologies and has the potential to dramatically change business models. This study aimed at establishing Cloud Computing adoption in Medium and High Tech ... -
Assessment of selected parameters for industrial effluents from some industrial sites in Nairobi, Kenya
(University of Nairobi, 2016)Abstract The discharge of industrial effluents into the environment poses a threat to human health and is of environmental concern to both plants and animals. Over the last several years there has been a great deal of ... -
Trust Model For Social Network Using Singular Value Decomposition
(University of Nairobi, 2016)For effective interactions to take place in a social network, trust is important. We model trust of agents using the peer to peer reputation ratings in the network that forms a real valued matrix. Singular value decomposition ... -
Level of Metal Pollutants in Water from Nyakomisaro Stream through Kisii Town
(University of Nairobi, 2016)Heavy metals are major pollutants of water sources. The source of these heavy metals is mostly from domestic, agricultural and industrial activities. Their presence in water even in low concentrations poses significant ... -
A roadmap for the adoption of government e-payments in Kenya
(University of Nairobi, 2016)Analogous to the Motorists roadmap that shows the roads, directions and distances to a destination of a given region [1]. A roadmap in this context is a detailed guideline that answers the “why-what-how" questions and lay ... -
Inter Annual Variability of Onset and Cessation of the Long Rains in Kenya
(University of Nairobi, 2016)This study examined the spatial and temporal variability of the onset and cessation of long rains (MAM). The daily rainfall data used in the study was obtained from the Kenya Meteorological Department (KMD. Both graphical ... -
Effects of Rainfall on Malaria Occurrences in Kenya
(University of Nairobi, 2015)In this paper, we analyze data on malaria prevalence in Kenya and investigate if there are incidences of malaria in areas formerly not prone to malaria infection. It is hoped that the findings of this study shall be used ... -
Aerosol optical depth patterns associated with urbanization and weather in Nairobi and Lamu
(University of Nairobi, 2016)The massive increase in emissions of air pollution due to economic and industrial growth over the last century has made air pollution an environmental problem throughout the world. This study investigated the spatial-temporal ... -
Investigating the Homogeneity of Monthly Rainfall Records in Kenya
(University of Nairobi, 2016)Homogenization of climate data is of major importance because non-climatic factors make avail-able data unrepresentative of the actual climate variation, and thus the conclusions of climatic and hydrological studies are ... -
E-Verification: The Missing component in E-Recruitment Systems
(2015)In a recruitment system the process of verifying academic papers is manual and does not employ any of the computing capabilities. The manual process allows fake certificates to pass on. In an attempt to curb the issues, ... -
Conflict Prediction Model in a Dynamic State
(2015)Environmental c onflicts arise as a consequence of actions prevent ing or compel ling some outcome at the resistance to the actions. More specifically, they are caused by anthropogenic activities tha t strain ... -
Subdegrees and suborbital graphs of symmetric group s n (n = 3, 4, 5) acting on unordered pai rs
(2015)In this research paper, we compute the ranks and subdegrees of the symmetric group S n (n = 3, 4, 5) acting on unordered pairs from the set X = When S n (n ≥ 4) acts on unordered pairs from X, the rank ... -
The Effect of the Operational Parameters on the Draft Requirement of Ripping in a Sandy Clay Soil
(2016)This study set out to investigate the effect of operational parameters (i.e. ripping depth and operational speed) during a ripping operation on the draft requirement during ripping in a sandy-clay soil. Field experiments, ... -
Retrieval of aerosol optical depth over ecologically stressed East African land surfaces from top of atmosphere radiance utilizing the aerosol free vegetation index.
(2015)Traditional satellite based AOD retrieval techniques with a coarse resolution such as collection 5 hardly provides a high spatial detail suitable for accurate AOD retrieval particularly over the ecologically stressed sites ... -
On the existence of a non-relativistic hermitian time operator
(2016)The existence of a hermitian time operator is proposed in the framework of non-relativistic quantum mechanics.The Heisenberg equation of motion is shown to yield constant rate of flow of time.It is shown to yield results ... -
Comparing PSO and GA Optimizers in MLP to Predict Mobile Traffic Jam Times
(2015)Freely-usable frequency spectrum is dwindling quickly in the face of increasingly greater demand. As mobile traffic overwhelm the frequency allocated to it, some frequency bands such as for terrestrial TV are insufficiently ...