Browsing Faculty of Natural Sciences by Title
Now showing items 2421-2440 of 2567
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UBV(RI)C JHK observations of Hipparcos-selected nearby stars
(Oxford University Press, 2010)We present homogeneous, standardized UBV(RI)C photometry for over 700 nearby stars selected on the basis of Hipparcos parallaxes. Additionally, we list JHK photometry for about half of these stars, as well as L photometry ... -
UBV(RI)C photometry of transiting planet hosting stars
(Oxford University Press, 2011)We present new UBV(RI)C photometry of 22 stars that host transiting planets, 19 of which were discovered by the Wide Angle Search for Planets (WASP) survey. We use these data together with Two Micron All Sky Survey (2MASS) ... -
UDCA: Energy optimization in wireless sensor networks using uniform distributed clustering algorithms
(Academic Journals Inc., 2011)Transceivers are the major energy consumption in a Wireless Sensor Network which is made of low-power, small in size, low cost and multi-functional nodes. These sensor nodes are operated by batteries which put significant ... -
Ultralarge-scale approximations and galaxy clustering: Debiasing constraints on cosmological parameters
(Oxford University Press, 2022)Upcoming galaxy surveys will allow us to probe the growth of the cosmic large-scale structure with improved sensitivity compared to current missions, and will also map larger areas of the sky. This means that in addition ... -
An unconditionally stable nonstandard finite difference method to solve a mathematical model describing Visceral Leishmaniasis
(Elsevier, 2021)In this paper, a mathematical model of Visceral Leishmaniasis is considered. The model incorporates three populations, the human, the reservoir and the vector host populations. A detailed analysis of the model is presented. ... -
Under-5 Mortality in Tanzania: a demographic scenario
(Tehran University of Medical Sciences, 2012)Background: The government of the United Republic of Tanzania has initiated the Integrated Management of Childhood Illness program to improve the health and wellbeing of children. Methods: Tanzania’s under-five mortality ... -
Underpotential deposition of SnBi thin films for sodium ion batteries: The effect of deposition potential and Sn concentration
(Elsevier, 2019)Bimetallic SnBi film was deposited on a Cu foil substrate via the electrochemical atomic layer deposition (E-ALD) technique. The deposition attainment of Sn and Bi were investigated using cyclic voltammetry (CV) and ... -
Understanding biobanking : An assessment of the public engagement speaking book intervention Biobanking and Me
(South African Medical Association, 2019)Meaningful engagement with donors of biological samples intended for human-sample biobanking increases knowledge, and allows donors to make informed decisions. Informed donors provide a platform for public awareness, ... -
Understanding climate change effects on the potential distribution of an important pollinator species, Ceratina moerenhouti (Apidae: Ceratinini), in the Eastern Afromontane biodiversity hotspot, Kenya
(Elsevier, 2023)Monitoring key pollinator taxa such as the genus Ceratina requires precise near real-time predictions to facilitate better surveillance. The potential habitat suitability of Ceratina moerenhouti was predicted in the Eastern ... -
Understanding climate change effects on the potential distribution of an important pollinator species, ceratina moerenhouti (apidae: ceratinini), in the eastern afromontane biodiversity hotspot, Kenya
(Elsevier Ltd, 2023)Monitoring key pollinator taxa such as the genus Ceratina requires precise near real-time predictions to facilitate better surveillance. The potential habitat suitability of Ceratina moerenhouti was predicted in the Eastern ... -
Understanding human coronavirus HCoV-NL63
(Bentham Science, 2010)Even though coronavirus infection of humans is not normally associated with severe diseases, the identification of the coronavirus responsible for the outbreak of severe acute respiratory syndrome showed that highly ... -
Understanding issues of people living with disabilities in South Africa
(SAGE Publications, 2013)The problem of disabilities is growing all over the world. Nevertheless, some progress has been made since the year 1981 was proclaimed International Year of Disabled Persons. In 2001 people living with disabilities accounted ... -
Understanding seasonal dynamics of invasive water hyacinth (eichhornia crassipes) in the greater letaba river system using sentinel-2 satellite data
(Taylor & Francis Online, 2019)Water hyacinth (Eichhornia crassipes) is one of the most aggressive and lethal free-floating aquatic weed that degrades and chokes freshwater ecosystems and threatens aquatic life. Early detection and up-to-date information ... -
Understanding the creek dynamics and environmental characteristics that determine the distribution of mangrove and salt marsh communities at Nahoon Estuary
(Elsevier, 2016)The southern distributional limit for mangroves on the east coast of Africa is thought to be at the planted mangrove forest at Nahoon Estuary (33° S) in the Eastern Cape, South Africa. This study investigated the influence of ... -
Understanding the epidemiology, pathophysiology, diagnosis and management of SARS-CoV-2
(SAGE, 2020)The emergence of coronavirus disease 2019 (COVID-19) in December 2019 has resulted in over 20 million cases and 741,808 deaths globally, affecting more than 200 countries. COVID-19 was declared a pandemic on 11 March 2020 ... -
Understanding the influence of land cover change and landscape pattern change on evapotranspiration variations in Gwayi catchment of Zimbabwe
(Taylor and Francis Group, 2022)Understanding dynamics in hydrological processes helps toimprove water resource management. Climate and land coverchanges influence ecohydrological processes. This study soughtto assess the influence of climate, land ... -
Understanding the spatial distribution of eroded areas in the former rural homelands of South Africa: Comparative evidence from two new non-commercial multispectral sensors
(Elsevier, 2018)In this study, we determine the most suitable multispectral sensor that can accurately detect and map eroded areas from other land cover types in Sekhukhune rural district, Limpopo Province, South Africa. Specifically, the ... -
UniQ-Typer ™ Y-10 genotyping in South African populations: novel alleles, sequence variation and allelic ladder updates
(Elsevier, 2019)DNA profiling the male specific region on the Y-chromosome is fundamental to forensic practise. It is recognised as a powerful tool for sexual assault investigations for resolving the male DNA components, for familial ... -
Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic nesterenkonia isolate
(American Society for Microbiology, 2011)Nesterenkonia strain AN1 was isolated from a screening program for nitrile- and amide-hydrolyzing microorganisms in Antarctic desert soil samples. Strain AN1 showed significant 16S rRNA sequence identity to known members ... -
A unique, ring-like radio source with quadrilateral structure detected with machine learning
(Oxford University Press, 2023)We report the discovery of a unique object in the MeerKAT Galaxy Cluster Le gacy Survey (MGCLS) using the machine learning anomaly detection framework ASTRONOMALY. This strange, ring-like source is 30 from the MGCLS field ...