Browsing Faculty of Natural Sciences by Title
Now showing items 1866-1885 of 2567
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Probing beyond-Horndeski gravity on ultra-large scales
(2020)The beyond-Horndeski gravity has recently been reformulated in the dark energy paradigm — which has been dubbed, Unified Dark Energy (UDE). The evolution equations for the given UDE appear to correspond to a non-conservative ... -
Probing beyond-Horndeski gravity on ultra-large scales
(IOP Publishing Ltd, 2020)The beyond-Horndeski gravity has recently been reformulated in the dark energy paradigm — which has been dubbed, Unified Dark Energy (UDE). The evolution equations for the given UDE appear to correspond to a non-conservative ... -
Probing Cosmology beyond ΛCDM using the SKA
(Indian Academy of Sciences, 2023)The cosmological principle states that the Universe is statistically homogeneous and isotropic at large distance scales. Currently, there exist many observations which indicate a departure from this principle. It has ... -
Probing primordial features with the primary CMB
(Elsevier, 2019)We propose to study the imprint of features in the primordial power spectrum with the primary CMB after the subtraction of the reconstructed ISW signal from the observed CMB temperature angular power spectrum. We consider ... -
Probing reionization with LOFAR (Low Frequency Array) using 21-cm redshift space distortions
(Oxford University Press, 2013)One of the most promising ways to study the epoch of reionization (EoR) is through radio observations of the redshifted 21-cm line emission from neutral hydrogen. These observations are complicated by the fact that the ... -
Probing the bias of radio sources at high redshift
(Oxford University Press, 2013)The relationship between the clustering of dark matter and that of luminous matter is often described using the bias parameter. Here, we provide a new method to probe the bias of intermediate-to-high-redshift radio ... -
Probing the imprint of interacting dark energy on very large scales
(American Physical Society, 2015)The observed galaxy power spectrum acquires relativistic corrections from light-cone effects, and these corrections grow on very large scales. Future galaxy surveys in optical, infrared and radio bands will probe increasingly ... -
Probing the nature of the conjectured low-spin wobbling bands in atomic nuclei
(Elsevier, 2022)The precession of an atomic nucleus can be approximately described as wobbling motion, arising from the coupling of a rotation and a harmonic vibration. Recently, a number of wobbling bands were reported at low spin, which ... -
The process of ratifying the treaty to establish the African medicines agency: perspectives of national regulatory agencies
(Oxford University Press, 2024)The vision of the African Medicines Agency (AMA) is to ensure that all Africans have access to affordable medical products that meet internationally recognized standards of quality, safety and efficacy for priority ... -
The production of hydrogen through the use of a 77 wt% Pd 23 wt% Ag membrane water gas shift reactor
(Elsevier, 2016)Hydrogen as an energy carrier has the potential to decarbonize the energy sector. This work presents the application of a palladium-silver (PdeAg) membrane-based reactor. The membrane reactor which is made from PdeAg ... -
The production of hydrogen through the use of a 77 wt% Pd 23 wt% Ag membrane water gas shift Reactor
(Elsevier, 2016)Hydrogen as an energy carrier has the potential to decarbonize the energy sector. This work presents the application of a palladium-silver (PdeAg) membrane-based reactor. The membrane reactor which is made from PdeAg film ... -
Profiles of antibody responses against severe acute respiratory syndrome coronavirus recombinant proteins and their potential use as diagnostic markers
(American Society for Microbiology, 2004) -
Progesterone, myo-inositol, dopamine and prolactin present in follicular fluid have differential effects on sperm motility subpopulations
(MDPI, 2021)Considering the challenges surrounding causative factors in male infertility, rather than relying on standard semen analysis, the assessment of sperm subpopulations and functional characteristics essential for fertilization ... -
Progress in remote sensing of grass senescence: A review on the challenges and opportunities
(Institute of Electrical and Electronics Engineers, 2021)Grass senescence estimation in rangeland is particularly important for monitoring the conditions of forage quality and quantity. During senescence, grasses lose their nutrients from the leaves to the root and thereby ... -
Progress in the remote sensing of groundwater-dependent ecosystems in semi-arid environments
(Elsevier, 2021)Remote sensing of groundwater-dependent ecosystems (GDEs) has increased substantially in recent years. Of significant prominence, is the delineation and mapping of groundwater-dependent vegetation (GDV), species diversity, ... -
Progress in the remote sensing of veld fire occurrence and detection: A review
(Wiley, 2023)Our research provides a detailed overview of the progress in remotely sensed fire monitoring techniques, which have been developed and employed for fire occurrence and detection. Our overview is provided from a literature ... -
Progress in the use of geospatial and remote sensing technologies in the assessment and monitoring of tomato crop diseases
(Taylor and Francis Group, 2022)With a growing global population and accelerating climatechange, systematic assessment and monitoring of crop diseases isurgently required to ensure food security and production.However, current dietary transitions ... -
Progress on perovskite materials for energy application
(Elsevier, 2021)Energy underlies the human development and welfare. Today energy depends on combustion of fossil fuels (coal, natural gas, oil) sources. These sources have not only led to severe environmental issues because it emits greenhouse ... -
Projections of human papillomavirus vaccination and its impact on cervical cancer using the caputo fractional derivative
(American Institute of Mathematical Sciences, 2023)We propose a fractional order model for human papillomavirus (HPV) dynamics, including the effects of vaccination and public health education on developing cervical cancer. First, we discuss the general structure of Caputo ... -
Promoted effect of zinc and sulfur on the structural and catalytic properties of bimetallic nickel–zinc catalysts for the dehydrogenation of propane
(Springer, 2022)Propane dehydrogenation catalysts, containing Ni and Zn were synthesised with the following wt% (13:0, 11:2, 9:4, 6.5:6.5, 4:9, 2:11 and 0:13) ratios. Structural and textural properties showed that when Zn increased to > ...