University of Nairobi Institutional Repository: Recent submissions
Now showing items 58261-58280 of 116514
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The Boundary Between The Northern And Southern Sq Current Loops Over The African Continent
(University of Nairobi, 1984-04)Geomagnetic declination variations of five quiet days in January, April, July and October 1969 are studied, based on observations from 11 African observatories. The variations are produced by electric current systems in ... -
Some properties of ionospheric irregularities as deduced from recordings of the San Marco II and BE-B satellites
(University of Nairobi, 1970-07)Recordings of scintillations on signals received at Nairobi from satellites San Marco II and BE-B have been analysed by correlation and dispersion methods, the correlation method equations being derived in a simpler way. ... -
Negative magnetic anomaly associated with Mount Kenya
(1974-08-16)MOUNT Kenya is a large central volcano just south of the equator in central Kenya. It rises to a height of 5,199 m above sea level. The base of the volcano covers an area of approximately 7,000 sq km, and is roughly circular ... -
Large-scale Irregularities In The Equatorial Ionosphere
(University of Nairobi, 1975-04)Variations in the Faraday fading period of the 40 MHz signal from satellite BE-B have been used to study large-scale irregularities in the equatorial ionosphere. It is found that the irregularities have sizes ranging from ... -
The Seasonal Occurrence Of Blanketing Sporadic-e Near The Geographic Equator
(University of Nairobi, 1972-06)It is shown that the latitude at which the occurrence of blanketing sporadic-E (View the MathML source) changes over from a June maximum to a December maximum is south of the geographic equator in the African and Far Eastern ... -
The F-Region Equatorial Irregularity Belt As Observed From Scintillation Of Satellite Transmissions
(University of Nairobi, 1969-01)Scintillation occurrence studies have been made on 40/41 MHz recordings of satellites BE-B and BE-C at Addis Ababa, Nairobi and Dar-es-Salaam. The results are presented in the form of latitude plots for the different ... -
Some Statistical Properties Of The Ground Diffraction Patterns Of Vertically Reflected Radio Waves
(University of Nairobi, 1966-02)This paper describes the results of a vertical incidence fading amplitude experiment vising an array of seven receiving aerials. The purpose of the experiment was to test certain assumptions in the correlation analysis of ... -
Fresnel-type Fading On Satellite Records At Low Latitudes
(University of Nairobi, 1975-08)Fresnel-type fading patterns have been observed on recordings of geostationary and travelling satellites made at three low-latitude stations in East Africa. The occurrence is greatest in the time periods 05–08 and 18–22 ... -
Movements Of Airglow Structures Within The Intertropical Arc Observed From Southern Kenya
(University of Nairobi, 1977)6300 Å airglow observations from Olorgesailie, Kenya (1.6°S, 36.4°E) show two types of movement within the southern intertropical red arc. The arc moves as a whole equatorwards at a rate of 3–4° per hour before local ... -
MHD Stokes Problem For A Vertical Infinite Plate In A Dissipative Rotating Fluid With Hall Current
(University of Nairobi, 1998)Natural convection in the hydromagnetic flow of a viscous incompressible rotating fluid system, taking into account viscous dissipative heat and Hall current, has been studied. The coupled nonlinear equations are solved ... -
Density-functional Study Of Luminescence In Polypyridine Ruthenium Complexes
(University of Nairobi, 2013-02)A density-functional theory (DFT) study of five ruthenium complexes has been carried out with the goal of gaining deeper insight into factors governing luminescence lifetimes. The five compounds are [Ru(bpy)3]2+ (1), ... -
Luni-solar variations in f0F2 at four African stations
(University of Nairobi, 1974-09)The luni-solar tidal oscillations in f0F2 at Djibouti, Tamanrasset, Lwiro and Nairobi have been examined and the results are presented in the form of percentage amplitude spectra. These show some consistent common features ... -
How soon after parturition can embryos be collected from sheep?
(University of Nairobi,, 1984)The 12 Merino ewes studied involved a centrol group of 3 non-pregnant, non-lactating ewes (group 1) and 3 groups comprising ewes that were 2, 4 and 8 wk post partum resp. All ewes were treated with a daily injection of 10 ... -
Chapter 21 – Floods in Kenya
(University of Nairobi, 2013)The vulnerability of a water resource system to climate change is a function of a number of physical features and social characteristics. The physical features associated with maximum vulnerability of water resources in a ... -
Evidence of a possible north-south shift of the western sector of the African plate—Discussion
(University of Nairobi, 1979-03)A negative anomaly in the vertical magnetic field component at a site in Nigeria has recently been interpreted by Oni in terms of a possible north-south shift of the western sector of the African plate. In this paper, ... -
The Palaeomagnetism of Late Cenozoic Volcanic Rocks from Kenya and Tanzania
(University of Nairobi, 1976-06)Palaeomagnetic results from 246 sites in the East African Cenozoic volcanics are reported. Palaeomagnetic pole positions are obtained for different age ranges as follows: 0–1.8 My, 104° E, 89° N, A95= 3° (54 sites); 1.8–7.0 ... -
Affordable assessment of newborn brain health following perinatal asphyxia in East Africa: a pilot study (728.6)
(University of Nairobi, 2014)Perinatal asphyxia is a major cause of infant mortality in the developing world with 280,000 deaths per year in sub-Saharan Africa alone. Brain injuries resulting from asphyxia can have detrimental effects on brain function, ... -
Vector Bundles of Low Rank on a multipurpose Space
(University of Nairobi, 2013)ABSTRACT. In this paper we construct vector bundles over a multiprojective space and study their properties. We first set out to establish the existence of monads on a multiprojective space pn X pm, for all integers n,m ... -
FeS2 thin films prepared by spray pyrolysis
(University of Nairobi, 1997-06)In the present work FeS2 films have been grown by spray pyrolysis followed by sulfidation. The structural, optical and electrical properties of these films have been investigated. The films were found to be n-type with an ... -
Light Soaking Induced Increase in Conversion Efficiency in Solar Cells Based on In(OH)xSy/Pb(OH)xSy
(2013)Light soaking characterization on complete SnO2:F/TiO2/ln(OH)xSy/PEDOT:PSS/Au, Pb(OH)xS)pEDOT:PSS/Au, eta solar cell structure as well as on devices which do not include one or both TiO2 and/or PEDOT:PSS layers has been ...
