Author:Gibson, L; Engelbrecht, Jeanine; Rush, DDate:Sep 2019Increasing global urbanisation is leading to a rise in the number of people living in informal settlements, challenging our ability to achieve sustainable development goals. As a consequence of high building density, inadequate building methods ...Read more
Author:Wessels, Konrad J; Steenkamp, Karen C; Von Maltitz, Graham P; Archibald, SDate:2011Vegetation phenology refers to the timing of seasonal biological events (for example, bud burst, leaf unfolding, vegetation growth and leaf senescence) and biotic and abiotic forces that control these. Daily, coarse-resolution satellite imagery ...Read more
Author:Salmon, BP; Kleynhans, W; Van den Bergh, F; Olivier, JC; Wessels, Konrad JDate:Jul 2012In this paper, the internal operations of an Extended Kalman Filter is investigated to see if any useful information can be derived to detect land cover change in a MODIS time series. The Extended Kalman Filter expands its internal covariance ...Read more
Author:Kleynhans, W; Salmon, BP; Olivier, JC; Van den Bergh, F; Wessels, Konrad J; Grobler, TDate:Jul 2012There has been recent developments in the use of hypertemporal satellite time series data for land cover change detection and classification. Recently, an Autocorrelation function (ACF) change detection method was proposed to detect the ...Read more
Author:Pieterse, Heloise; Olivier, M; Van Heerden, Renier PDate:Aug 2018Ever improving technology allows smartphones to become an integral part of people's lives. The reliance on and ubiquitous use of smartphones render these devices rich sources of data. This data becomes increasingly important when smartphones ...Read more
Author:Kleynhans, W; Salmon, BP; Olivier, JCDate:Oct 2015Recent times have seen a significant increase in the amount of readily available SAR data, with many current and historic SAR data holdings now adopting an open distribution policy. As more regular SAR observations are becoming available, the ...Read more
Author:Kleynhans, W; Salmon, BPDate:Jul 2014The detection of new informal settlements in South Africa using time-series data derived from coarse resolution satellite imagery has recently been an active area of research. Most of the previous methods presented using hyper-temporal satellite ...Read more
Author:Magidimisha, Edwin; Faniso-Mnyaka, Zimbini; Naidoo, Seelenthren; Nana, Muhammad ADate:Apr 2023The severity of wildland vegetation fires is expected to grow in response to climate change. Therefore, the price of combating fires will likewise go up while still posing a serious risk to the firefighters. Various countries have invested ...Read more
Author:Uys, H; Biercuk, M; Britton, JW; Van Devender, AP; Bollinger, JJDate:Sep 2010This article reports on a calibrated measurement of 174 Yoctonewton using a cloud of 60 9 Be+ ion confined in a Penning ion trap. These measurements suggest that ion traps may form the basis of a new class of ultrasensitive deployable force sensors.Read more
Author:Lamprecht, GH; Human, HGC; Snyman, LWDate:Oct 2007The viability of using pulsed laser excited Raman spectroscopy as a method for diamond detection from ore, has been investigated. In this method the spontaneous Stokes Raman signal is used as indicator of diamond, and a dual channel system ...Read more
Author:Genthe, Bettina; Gericke, M; Bateman, B; Mjoli, N; Kfir, RDate:1995Gene probes developed locally for both enteric Adenoviruses 40 and 41 were used to determine whether these viruses were present in both raw and treated waters. Approximately sixty water samples were concentrated by ultra filtration and analysed ...Read more
Author:Steenkamp, CM; Dickenson, GD; Nortje, AC; Rohwer, EG; Du Plessis, ADate:Sep 2010Twenty rovibronic transitions of the e(v'=5)-X(v''=0) band of the 12C16O which experimental wavelengths were previously unavailable were recently detected by vr induced fluorescence excitation spectroscopy. The data is important in astrophysical ...Read more
Author:Olivier, JC; Araya, ST; Wessels, Konrad JDate:Nov 2007An Artificial Neural Network (ANN) is proposed to detect human-induced land cover change using a sliding window through a time-series of Moderate Resolution Imaging Spectroradiometer (MODIS) satellite surface reflectance pixel values. Training ...Read more