Author:García, CL; Jovanovic, Nebojsa; Teich, I; Fink, M; Dzikiti, Sebinasi; Bugan, Richard DHDate:Apr 2020Reliable spatial data of evapotranspiration (ET) in support of water resources management are limited. ET is a major component of the water balance, in many regions, and therefore it is critical that it be accurately quantified. To identify ...Read more
Author:Ramoelo, Abel; Cho, Moses A; Mathieu, Renaud SA; Skidmore, AK; Schlerf, M; Heitkönig, IMADate:Oct 2012Grass quality and quantity information plays a crucial role in understanding the distribution, densities and population dynamics of herbivores (i.e. livestock and wildlife). Leaf nitrogen (N) and biomass (g/ m2) are indicators of grass quality ...Read more
Author:Gama, MJ; Cho, Moses A; Chirwa, P; Masemola, CeciliaDate:Mar 2019Trees provide low-cost organic inputs, with the potential to improve livelihoods for rural communities. Understanding foliar nutrients of tree species is crucial for integration of trees into agroecosystems. The study explored nitrogen (N), ...Read more
Author:Naidoo, Laven; Main, Russell S; Cho, Moses A; Madonsela, Sabelo; Majozi, Nobuhle, PDate:Jul 2021Sentinel-1 and Sentinel-2 have provided consistent hyper-temporal information (5–7 days or earlier) at high spatial resolutions (10m) on biophysical composition, structural and physiological conditions of crops in a variety of environments. ...Read more
Author:Burke, Michael G; Brink, WDate:Nov 2010This paper presents a monocular vision-based technique for extracting orientation information from a human torso for use in a robotic human-follower. Typical approaches to human-following use an estimate of only human position for navigation, ...Read more
Author:Pieterse, N; Focke, WW; Vuorinen, E; Racz, IDate:Aug 2006Volatile corrosion inhibitors (VCIs) are incorporated into packaging paper or film to protect metals against atmospheric corrosion. The vapour pressure determines the equilibrium concentration of a volatile corrosion inhibitor (VCI) in the ...Read more
Author:Oelofse, Suzanna HH; Nahman, AntonDate:Aug 2012Throughout the developed world, food is treated as a disposable commodity. Between one third and half of all food produced for human consumption globally is estimated to be wasted. However, attempts to quantify the actual magnitude of food ...Read more
Author:Lysko, Albert A; Mfupe, Luzango PDate:Dec 2022The radio frequency spectrum is a very valuable resource. Analogue television broadcasting uses the spectrum inefficiently and television (TV) broadcasting brings less income than mobile services. With these, the world is moving to digital ...Read more
Author:Madonsela, Sabelo; Cho, Moses A; Ramoelo, Abel; Mutanga, O; Naidoo, LavenDate:Apr 2018Remote sensing applications in biodiversity research often rely on the establishment of relationships between spectral information from the image and tree species diversity measured in the field. Most studies have used normalized difference ...Read more
Author:Goncalves, DP; Griffith, DJDate:May 2006Resolution testing of imaging optical equipment is still commonly performed using the USAF 1951 target. The limiting resolution is normally calculated from the group and element that can just be resolved by an observer. Although resolution ...Read more
Author:Oelofse, Suzanna HH; Muswema, Aubrey PDate:Sep 2013Globally there are sufficient land and water resources to produce food over the next 50 years, but only if water for agriculture is better managed (Molden, 2007). Water is a critical and strategic natural resource in South Africa. It is ...Read more
Author:Ibraimo, NA; Taylor, NJ; Steyn, JM; Gush, Mark B; Annandale, JGDate:Nov 2016Mature pecans use large quantities of water and therefore the accurate estimation of water use or evapotranspiration (ET) of pecan orchards is critical for judicious irrigation water management and planning. Measuring ET under all possible ...Read more
Author:Bidgood, Peter MDate:Jan 2017The estimation of balance uncertainty using conventional statistical and error propagation methods has been found to be both approximate and laborious to the point of being untenable. Direct Simulation by Monte Carlo (DSMC) has been shown to ...Read more
Author:Adjorlolo, C; Mutanga, O; Cho, Moses ADate:May 2014This paper assesses the potential of multispectral data attained using WorldView-2 (WV2) satellite to estimate and map the variability in canopy nitrogen (N) concentration across C3 and C4 grasslands. The WV2 satellite image was acquired for ...Read more
Author:Sun, Z; Gebremichael, M; Ardö, J; Nickless, A; Caque, B; Merboldh, L; Kutschi, WDate:Aug 2012Most existing remote sensing-based evapotranspiration (ET) algorithms rely exclusively on polar-orbiting satellites with thermal infrared sensors, and therefore the resulting ET values represent only “instantaneous or snapshot” values. However, ...Read more
Author:Moodley, FB; Thambiran, TirushaDate:Oct 2015International shipping is recognised as an important sector of the global economy with over 80% of trading goods being transported by ships. Emissions from Ocean-Going Vessels (OGVs) which are generally powered by diesel fuel are thus ...Read more
Author:Kruger, AC; Goliger, Adam M; Retief, JV; Sekele, SSDate:Aug 2010The South African Weather Service, with the support of the Council for Scientific and Industrial Research (CSIR) and the University of Stellenbosch, is in the process of updating the extreme surface wind statistics for South Africa. A previous ...Read more
Author:Symes, CT; Woodborne, SDate:Apr 2011The diet of the harvester termite Hodotermes mossambicus was investigated at two sites with distinct dietary components: C4 grasses (d13C isotope values, -13.8‰ to -14.0‰) and C3 plants (d13C isotope values, -25.6‰ to -27.1‰). By comparing ...Read more
Author:Nickless, A; Archibald, SA; Van der Merwe, Martina R; Scholes, RJ; Williams, CA; Hanan, NDate:Mar 2011Annual estimates of gross primary production (GPP) and ecosystem respiration (Reco) were obtained for the Skukuza flux site, Kruger Park, South Africa, based on the eddy covariance flux data. A new method of extrapolating night-time respiration ...Read more