Author:Zbonak, A; Bush, TDate:Sep 2006An investigation was conducted to test the feasibility of near infrared spectroscopy (NIR) as a tool for predicting the microfibril angle (MFA) of solid wood samples of Pinus patula. Thirty 14 year-old trees were selected from three compartments ...Read more
Author:Marais, ELDate:2006The importance of traceability for every measurement that is made cannot be over-emphasised. For calibration and testing laboratories, traceability is normally imported through calibration of the standards and equipment used in the laboratory. ...Read more
Author:Paige-Green, PDate:2007Performance-related specifications for the selection of gravel materials for use in unsealed roads were developed in South Africa in the late 1980's along with associated deterioration models. The implementation of these has shown that, when ...Read more
Author:Mahlathi, Christopher D; Brink, IC; Wilms, JMDate:Mar 2024River water quality modelling relies on a good dataset for model input, calibration and validation to develop a reliable model. Determination of data requirements, and data sourcing towards this purpose in South Africa, are not elementary. ...Read more
Author:Vhengani, L; Lubbe, M; Griffith, D; Lysko, MDate:Oct 2010The success or failure of any earth observation mission depends on the quality of its data. Data quality is assessed by determining the radiometric, spatial, spectral and geometric fidelity of the satellite sensor. The process is termed calval. ...Read more
Author:Bello, O; Abu-Mahfouz, Adnan MI; Haman, Y; Page, Philip R; Adedeji, KB; Piller, ODate:Mar 2019Modern water distribution networks (WDNs) are complex and difficult to manage due to increased level of urbanization, varying consumer demands, ageing infrastructure, operational costs, and inadequate water resources. The management problems ...Read more
Author:Griffith, D; Lysko, M; Bezuidenhout, DDate:Jul 2009Internationally, the remote observation of Earth is rapidly maturing alongside the need for higher accuracy in radiance measurements. Accuracy of, and confidence in Earth radiance measurements is vital for applications such as climate change ...Read more
Author:Monem, S; Singh, A; Karsten, AE; Amin, R; Harith, MADate:Dec 2015Tissue simulators, the so-called tissue phantoms, have been used to mimic human tissue for spectroscopic applications. Phantoms’ design depends on patterning the optical properties, namely absorption and scattering coefficients which characterize ...Read more
Author:Leigh, L; Helder, D; Behnert, I; Deadman, A; Fox, N; Leloglu, UM; Özen, H; Griffith, DDate:Jul 2011The Tuz Gölü site does demonstrate some challenges for being used as an absolute calibration site. These include: spatial and temporal variability on the order of +/- 0.02, atmospheric transmittance variability on the order of between 0.52 ...Read more