Browsing Earth Sciences by Title
Now showing items 150-169 of 273
-
On the use of electrical resistivity methods in monitoring infiltration of salt fluxes in dry coal ash dumps in Mpumalanga, South Africa
(Water Research Commission, 2013)One of the principal environmental concerns relating to coal combustion waste disposal is the potential for groundwater contamination from salt fluxes and trace elements that may be leached into the underlying groundwater ... -
The organisation of urban agriculture in Cape Town, South Africa: A social capital perspective
(Taylor & Francis, 2018)This article explores urban agriculture in Cape Town and its organisational forms. Based on a literature review of peerreviewed articles and grey literature, it examines the state of linkages among urban farmers and various ... -
The origin of radio emission in broad absorption line quasars: Results from the Lofar Two-metre Sky Survey (Corrigendum)
(EDP Sciences, 2020)We report an erratum in Morabito et al. (2019, A&A, 622, A15). When calculating radio powers from observed flux densities, the wrong sign convention was used. This resulted in an underestimation of the radio powers by a ... -
An overview of trace elements in soils of Keana-Awe Brine-Fields, Middle Benue Trough, Nigeria
(Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2017)The objective of this study was to determine the concentration of trace elements in soils of Keana-Awe brine-fields. Composite soil samples were randomly collected at a depth of 0–15 cm and were analysed for molybdenum, ... -
Pansharpened landsat 8 thermal-infrared data for improved land surface temperature characterization in a heterogeneous urban landscape
(Elsevier, 2022)Challenges associated with adolescents are prevalent in South African societies. During the adolescence stage, children may become involved in deviant behaviour. Although a significant number of studies have focused on the ... -
The performance of photometric reverberation mapping at high redshift and the reliability of damped random walk models
(Oxford University Press, 2020)Accurate methods for reverberation mapping using photometry are highly sought after since they are inherently less resource intensive than spectroscopic techniques. However, the effectiveness of photometric reverberation ... -
Permian to cretaceous granites and felsic volcanics from SW Vietnam and S Cambodia: Implications for tectonic development of Indochina
(Asian Earth Sciences, 2021)Zircon ages and geochemistry are presented for igneous rocks from SW Vietnam and S Cambodia. Four main age groupings occur: Cretaceous (107–75 Ma), Early Jurassic (195 Ma), Late Triassic (230–222 Ma), and Permian (294–265 ... -
Petroleum source rock potential evaluation: A case study of block 11a, Pletmos sub‑basin, offshore South Africa
(Springer, 2023)Among the several existing geochemical methods in hydrocarbon exploration, the technique linking total organic carbon content (TOC) and Rock–Eval pyrolysis is most widely used, largely as a result of its capacity to rapidly ... -
Petrological, geochemical (major, trace, and rare earth elements), and U–Pb zircon data of the Tamatán Group, NE Mexico
(Elsevier, 2021)From samples of the Paleozoic Tamatán Group (Huizachal–Peregrina Anticlinorium, Tamaulipas, Mexico), petrographic (qualitative and modal) and geochemical analyses (major, trace, and rare earth elements) were conducted. The ... -
Petrophysical interpretation and fluid substitution modelling of the upper shallow marine sandstone reservoirs in the Bredasdorp Basin, offshore South Africa
(Springer Nature, 2020)The fluid substitution method is used for predicting elastic properties of reservoir rocks and their dependence on pore fluid and porosity. This method makes it possible to predict changes in elastic response of a rock ... -
Phosphorus fractions in the sediments of yuecheng reservoir, china
(MDPI, 2019)As a result of the inexorable development of the economy and the ever-increasing population, the demand for water in the urban and rural sectors has increased, and this in turn has caused the water quality and eutrophication ... -
Photoluminescence quenching of a novel electroconductive poly(Propylene thiophenoimine)-co-poly(ethylenedioxy thiophene) star copolymer
(MDPI, 2020)A generation 1 poly(propylene thiophenoimine)-co-poly(ethylenedioxy thiophene) (G1PPT-co-PEDOT) star copolymer, which exhibits a strong optical absorption over a broad range in the ultraviolet–visible (UV-Vis) region and ... -
Pinpointing areas of increased soil erosion risk following land cover change in the Lake Manyara catchment, Tanzania
(Elsevier, 2018)Lack of long-term scientific land cover and erosional data impedes the development of sustainable land management plans to tackle land degradation and soil erosion problems in Tanzania. Using Landsat imagery, almost three ... -
Planck 2018 results: I. Overview and the cosmological legacy of Planck
(EDP Sciences, 2020)The European Space Agency’s Planck satellite, which was dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave and submillimetre sky continuously between ... -
Planck 2018 results: II. low frequency Instrument data processing
(EDP Sciences, 2020)We present a final description of the data-processing pipeline for the Planck Low Frequency Instrument (LFI), implemented for the 2018 data release. Several improvements have been made with respect to the previous release, ... -
Planck 2018 results: III. High frequency instrument data processing and frequency maps
(EDP Sciences, 2020)This paper presents the High Frequency Instrument (HFI) data processing procedures for the Planck 2018 release. Major improvements in mapmaking have been achieved since the previous Planck 2015 release, many of which were ... -
Planck 2018 results: IV. Diffuse component separation
(EDP Sciences, 2020)We present full-sky maps of the cosmic microwave background (CMB) and polarized synchrotron and thermal dust emission, derived from the third set of Planck frequency maps. These products have significantly lower contamination ... -
Planck 2018 results: V. CMB power spectra and likelihoods
(EDP Sciences, 2020)We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from the 2018 data release. The overall approach is similar in spirit to the one retained for the 2013 and 2015 data release, with a hybrid ... -
Planck 2018 results: VI. Cosmological parameters
(EDP Sciences, 2020)We present cosmological parameter results from the final full-mission Planck measurements of the cosmic microwave background (CMB) anisotropies, combining information from the temperature and polarization maps and the ... -
Planck 2018 results: VII. Isotropy and statistics of the CMB
(EDP Sciences, 2020)Analysis of the Planck 2018 data set indicates that the statistical properties of the cosmic microwave background (CMB) temperature anisotropies are in excellent agreement with previous studies using the 2013 and 2015 data ...