Browsing Faculty of Natural Sciences by Title
Now showing items 888-907 of 2567
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Forming the Moon from terrestrial silicate-rich material
(Elsevier, 2013)Recent high-precision measurements of the isotopic composition of lunar rocks demonstrate that the bulk silicate Earth and the Moon show an unexpectedly high degree of similarity. This is inconsistent with one of the ... -
The “four sigma” limit for significant periodicities
(Springer Verlag, 2010)Most of the pulsations which have been observed in sdB stars have very low amplitudes. Detection of modes from photometric observations is usually performed by noting the most prominent peaks in a periodogram or, ... -
Fracture development and fractal characteristics of overburden rock under repeated mining
(Spinger, 2021)The purpose of this paper is to provide scientific basis for the stability evaluation of overburden rock of repeated mining goaf under the expressway. The objectives of the present study are to reveal the development of ... -
FRAGS: Estimation of coding sequence substitution rates from fragmentary data
(BMC, 2004)Rates of substitution in protein-coding sequences can provide important insights into evolutionary processes that are of biomedical and theoretical interest. Increased availability of coding sequence data has enabled ... -
A framework and toolkit for the collection and analysis of QoS statistics for voice traffic in Next Generation Networks
(Telkom, 2000)The multi-service, multi-architecture nature of NGNs is so complex that the management of services, in addition to networks, emerges as a research challenge. Despite QoS limitations, VoIP (as opposed to VoATM), dominates ... -
A framework and toolkit for the collection and analysis of QoS statistics for voice traffic in Next Generation Networks
(Telkom, 2000)The multi-service, multi-architecture nature of NGNs is so complex that the management of services, in addition to networks, emerges as a research challenge. Despite QoS limitations, VoIP (as opposed to VoATM), dominates ... -
A framework for assessing the performance of pulsar search pipelines
(Oxford Unviersity Press, 2016)In this paper, we present a framework for assessing the effect of non-stationary Gaussian noise and radio frequency interference (RFI) on the signal to noise ratio, the number of false positives detected per true positive ... -
The frequency of very young galaxies in the local Universe – II. The view from SDSS spectra
(Oxford University Press, 2019)Only a handful of galaxies in the local Universe appear to be very young. We estimate the fraction of very young galaxies (VYGs), defined as those with more than half their stellar masses formed within the last Gyr. We fit ... -
Frequency, kinetics and determinants of viable SARS-cov-2 in bioaerosols from ambulatory COVID-19 patients infected with the beta, delta or omicron variants
(Nature Research, 2024)Airborne transmission of SARS-CoV-2 aerosol remains contentious. Importantly, whether cough or breath-generated bioaerosols can harbor viable and replicating virus remains largely unclarified. We performed size-fractionated ... -
From benthic to floating: phytoplankton dynamics in African freshwater lakes and reservoirs
(Elsevier, 2023)This chapter reviewed phytoplankton communities in African freshwater lakes and reservoirs and further assessed the latitudinal diversity gradient (LDG) which has been used to explain species variations in other taxonomic ... -
From conflict to collaboration: Atewa forest governance
(Taylor and Francis Group, 2023)The problem of forest degradation and loss has become theconcern of many countries. To address this challenge, somecollaborate in sustainable forest management. The mostsuccessful outcomes, however, are observed where ... -
From vagueness to precision: raising the volume on social issues for the water sector
(IWA Publishing, 2013)The paper raises the volume on complex social issues that affect water management. The paper proposes Amartya Sen's capability approach (CA) as a suitable framework against which to consider these complex ideals. This ... -
Fuel cell-battery hybrid powered light electric vehicle (golf cart): Influence of fuel cell on the driving performance
(Elsevier, 2013)A light electric vehicle (golf cart, 5 kW nominal motor power) was integrated with a commercial 1.2 kW PEM fuel cell system, and fuelled by compressed hydrogen (two composite cylinders, 6.8 L/300 bar each). Comparative ... -
A full treatment of peculiar velocities on the reionization light cone
(Oxford Academic, 2019)Accurate simulations of the 21-cm signal from the Epoch of Reionization require the generation of maps at specific frequencies given the values of astrophysical and cosmological parameters. The peculiar velocities of the ... -
Full-sky bispectrum in redshift space for 21cm intensity maps
(IOP Publishing, 2020)We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the ... -
A fumonisins immunosensor based on polyanilino-carbon nanotubes doped with palladium telluride quantum dots
(MDPI, 2015)An impedimetric immunosensor for fumonisins was developed based on poly(2,5-dimethoxyaniline)-multi-wall carbon nanotubes doped with palladium telluride quantum dots onto a glassy carbon surface. The composite was assembled ... -
Functional and structural analysis of predicted proteins obtained from homo sapiens' minisatellite 33.15-tagged transcript pAKT-45 variants
(Hindawi, 2020)The spermatozoa are transcriptionally dormant entities which have been recognized to be an archive of mRNA, coding for a variety of functionally crucial cellular proteins. This significant repository of mRNA is predicted ... -
Functional landscape of SARS-CoV-2 cellular restriction
(Cell Press, 2021)A deficient interferon (IFN) response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has been implicated as a determinant of severe coronavirus disease 2019 (COVID-19). To identify the molecular ... -
Functional metal oxides synthesized using natural extracts from waste maize materials
(Elsevier, 2021)We show in this article the possibilities of employing an environmentally friendly, uncomplicated, economical and sustainable green synthesis technique effected by natural extracts from waste maize (zea mays lea) materials to ... -
Functional prediction of candidate micrornas for CRC management using in silico approach
(MDPI, 2019)Approximately 30–50% of malignant growths can be prevented by avoiding risk factors and implementing evidence-based strategies. Colorectal cancer (CRC) accounted for the second most common cancer and the third most common ...