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Browsing by Author "Steyn, JM"

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Are simple empirical crop coefficient approaches for determining pecan water use readily transferrable across a wide range of conditions?

Author: Taylor, NJ ; Annandale, JG ; Ibraimo, NA ; Steyn, JM ; Gush, Mark B Date: Feb 2017 planning. However, it is impossible to measure ET under all possible combinations of climate and management practices, which necessitates the use of ET models. Although empirical models are more likely to be adopted by consultants and growers, ... Read more
Climate change and potato production in contrasting South African agro-ecosystems 1. Effects on land and water use efficiencies

Author: Haverkort, AJ ; Franke, AC ; Engelbrecht, FA ; Steyn, JM Date: Mar 2013 Explorations of the impact of climate change on potential potato yields were obtained by downscaling the projections of six different coupled climate models to high spatial resolution over southern Africa. The simulations of daily maximum and ... Read more
Double dipole antenna for dual-band wireless local area networks applications

Author: Steyn, JM ; Odendaal, JW ; Joubert, J Date: Sep 2009 A double dipole antenna design is proposed for wireless local area network (WLAN) applications. Two parallel dipoles are used to facilitate operation in both the standard WLAN frequency bands (IEEE 802.11b and IEEE 802.11a) simultaneously. ... Read more
Dual-band dual-polarized array for WLAN applications

Author: Steyn, JM ; Odendaal, JW ; Joubert, J Date: 2009 Paper presents a dual-band dual-polarized antenna array design for WLAN applications. Four double-dipole elements are orthogonally interleaved to facilitate operation in both the standard WLAN frequency bands (IEEE 802.11b and IEEE 802.11a) ... Read more
Estimating water use of mature pecan orchards: A six stage crop growth curve approach

Author: Ibraimo, NA ; Taylor, NJ ; Steyn, JM ; Gush, Mark B ; Annandale, JG Date: Nov 2016 Mature 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
Polarization diverse antenna for dual-band WLAN applications

Author: Steyn, JM ; Joubert, J ; Odendaal, JW Date: Oct 2009 A dual-band dual-polarized (DBDP) configuration is proposed for wireless local area network (WLAN) applications. A four-element array is used to facilitate operation in both the standard WLAN frequency bands (IEEE 802.11b and IEEE 802.11a) ... Read more
Using image quality measures and features to choose good images for classification of ISAR imagery

Author: Steyn, JM ; Nel, Willem AJ Date: Oct 2014 Most research efforts in ISAR focus on techniques to form the image via autofocus or on classification (assuming that the ISAR imagery is already generated). An important step between image formation and classification is to determine which ... Read more

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Browsing by Author "Steyn, JM"

Browsing by Author "Steyn, JM"

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