Faculty of Science & Technology (FST): Recent submissions
Now showing items 2401-2420 of 4283
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Defining resistance in Schistosoma.
(University of Nairobi,Department of Zoology, 1997-04)No abstract -
Estimation of evapotranspiration using fuzzy state models.
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2000)The suitability of fuzzy logic was examined for estimating evapotranspiration (ET). Two fuzzy ET models, one using two input weather parameters (solar radiation and relative humidity), and the other using three input weather ... -
Indigenous Knowledge of Climatic Conditions for Sustainable Crop Production under Resource-Poor Farming Conditions Using Participatory Techniques
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2013)Rambuda irrigation scheme is situated in Vhembe District of Limpopo Province in South Africa. It was established in 1952 and farmers do not have access to recorded climatic information. Farmers are growing crops on a ... -
Evaluation of the impact of surface residue cover on single and dual crop coefficient for estimating soybean actual evapotranspiration
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2012-02)Single and dual crop coefficient methods are used in conjunction with grass reference evapotranspiration (ETo) to estimate actual crop evapotranspiration (ETc). However, the impact of soil surface residue cover on the ... -
Performance Of Extended Shuttleworth-wallace Model For Estimating And Partitioning Of Evapotranspiration In A Partial Residue-covered Subsurface Drip-irrigated Soybean Field
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2011)Estimation of actual evapotranspiration (ET), especially its partitioning into plant transpiration (T) and soil evaporation (E), in agricultural fields is important for effective soil water management and conservation and ... -
Evaluating the Impact of Daily Net Radiation Models on Grass and Alfalfa-Reference Evapotranspiration Using the Penman-Monteith Equation in a Subhumid and Semiarid Climate Read More: http://ascelibrary.org/doi/abs/10.1061/(ASCE)IR.1943-4774.0000278
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2011)Net radiation (Rn) is the main driving force of evapotranspiration (ET) and is a key input variable to the Penman-type combination and energy balance equations. However, Rn is not commonly measured. This paper analyzes the ... -
Impact of microclimatic data measured above maize and grass canopies on Penman-Monteith reference evapotranspiration calculations.
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2009)Estimation of reference evapotranspiration (ETref) using measured microclimatic data and the Penman-Monteith (PM) method provides a powerful means of quantifying actual plant evapotranspiration (ETa) needed for use in ... -
ASCUS in screening
(College of Physical and Biological Sciences, 2001)The significance and use of the cytological diagnosis "atypical squamous cells of undetermined significance" (ASCUS) remain a major problem in cervical cancer screening. The prevalence of ASCUS by patient age has seldom ... -
Estimation of reference crop evapotranspiration using fuzzy state models
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2001)Daily evapotranspiration (ET) rates are needed for irrigation scheduling. Owing to the difficulty of obtaining accurate field measurements, ET rates are commonly estimated from weather parameters. A few empirical or ... -
Subsurface characterization ustng textural features extracted from GPR data
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2007)Subsurface conditions can be non-intrusively mapped by observing and grouping patterns of similarity within ground-penetrating radar (GPR) profiles. We have observed that the intricate and often visually indiscernible ... -
l-Arginine supplementation in women with chronic hypertension: impact on blood pressure and maternal and neonatal complications
(College of Physical and Biological Sciences, 2010)Objective. To evaluate l-arginine (l-Arg) supplementation in pregnant women with chronic hypertension and its effects on blood pressure (BP) and maternal and neonatal complications. Methods. We enrolled 80 women affected ... -
Investigation of a Fuzzy-Neural Network Application in Classification of Soils Using Ground-Penetrating Radar Imagery
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2004) -
Obstetricians’ and Midwives’ Attitudes toward Cesarean Section
(College of Physical and Biological Sciences, 2008) -
The Media Environment in Kenya Since 1990
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2002) -
Optimization of fuzzy evapotranspiration model through neural training with input-output examples
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2001)In a previous study, we demonstrated that fuzzy evapotranspiration (ET) models can achieve accurate estimation of daily ET comparable to the FAO Penman-Monteith equation, and showed the advantages of the fuzzy approach ... -
Contrasts between the Vibronic Contributions in the tris-(2,2′-bipyridyl)Osmium(II) Emission Spectrum and the Implications of Resonance-Raman Parameters
(Department of Chemistry, 2009)The emission spectrum of the tris-(2,2′-bipyridine)osmium(II) metal-to-ligand charge transfer (MLCT) excited-state frozen solution at 77 K differs qualitatively from that expected based on its reported resonance-Raman (rR) ... -
Modeling water balance components in relation to field layout in lowland paddy fields. II: Model application
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 1996-04)In a companion paper, the development of a water balance model to predict the changes in water balance components in relation to field layout in lowland paddy fields was outlined. In this study, the model was applied to a ... -
Computational Modeling of the Triplet Metal-to-Ligand Charge-Transfer Excited-State Structures of Mono-Bipyridine–Ruthenium(II) Complexes and Comparisons to their 77 K Emission Band Shapes
(Department of Chemistry, 2013)A computational approach for calculating the distortions in the lowest energy triplet metal to ligand charge-transfer (3MLCT = T0) excited states of ruthenium(II)–bipyridine (Ru–bpy) complexes is used to account for the ... -
Computerized Evaluation of Fetal Heart Rate during Tocolytic Treatment: Comparison between Atosiban and Ritodrine
(2009)We compared the effects of ritodrine and atosiban treatments on fetal cardiovascular behavior by computerized nonstress test (c-NST) analysis. Women diagnosed with preterm labor were randomized to receive either atosiban ... -
Effects of Vapor-Pressure Deficit and Net-Irradiance Calculation Methods on Accuracy of Standardized Penman-Monteith Equation in a Humid Climate
(University of NairobiCollege of Biological and Physical Sciences,University of Nairobi, 2005-06)The effects of some common vapor pressure deficit (VPD) and net irradiance (Rn) calculation methods on the accuracy of ETo values estimated by using the standardized ASCE Penman-Monteith (ASCE-PM) equation for short grass ...