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Now showing items 580-599 of 5732

A CA-CFAR and localized wavelet ship detector for sentinel-1 imagery

Author: Schwegmann, CP ; Kleynhans, W ; Salmon, BP ; Mdakane, L Date: Jul 2015 The Maritime Domain Awareness initiative seeks to constantly improve the ways in which maritime information is collected. With the recent release of free Sentinel-1 imagery to the public, monitoring the maritime environment has become a more ... Read more
Calculating the variance and prediction intervals for estimates obtained from allometric relationships

Author: Nickless, A ; Scholes, RJ ; Archibald, S Date: 01 Sep 2010 Often researchers are interested in obtaining estimates of variables which are quite difficult or expensive to measure. To obtain these estimates, relationships between those variables of interest and more easily measured variables are used. ... Read more
Calculation of condition indices for road structures using a deduct points method

Author: Roux, Michael P ; Taute, A Date: Jul 2016 The DER-rating method has been adopted as the national standard for the rating of road structures. This method is defects-based and involves the rating of defects on the various inspections items of road structures in terms of degree (D), ... Read more
Calibration of an experimental six component wind tunnel block balance using optical fibre sensors

Author: de Ponte, JD ; Pieterse, JJ ; Bidgood, Peter M Date: May 2016 In order to meet the increasingly stringent requirements for wind tunnel balances, as expressed by the wind tunnel testing community, balance design philosophy needs to be further expanded to include alternative sensor, material, design and ... Read more
Calibration of brick masonry partial safety factors for the South African Code

Author: Mahachi, J ; Khanye, L ; Goliger, Adam M Date: Sep 2007 The current South African Code of Practice for structural use of masonry uses four partial safety factors gm, for materials depending on construction control and quality control. With the boom in the construction industry, new entrants in the ... Read more
Caltrans accelerated pavement testing (CAL/APT) program - test results: 1993-1996

Author: Nokes, WA ; Harvey, JT ; Du Plessis, L ; Long, F ; Stolarski, PJ Date: Aug 1997 By combining the results of both the HVS and laboratory tests, interpretations of pavement performance are described and recommendations for pavement design and construction have been made to Caltrans. Read more
Camera-based side-slip measurement for tyre testing

Author: De Saxe, Christopher ; Berman, Robert J ; Clarke, Anria ; Reinecke, John D Date: Jul 2019 Tyre parameterisation is fundamental to vehicle dynamics research, as tyre properties have a significant impact on the behaviour of a vehicle. One way in which some of the primary tyre parameters can be extracted is a trailer-based tyre tester, ... Read more
Campaign for vicarious calibration of SumbandilaSat in Argentina

Author: Vhengani, LM ; Griffith, D ; Lysko, M Date: Jul 2011 The importance of calibrating satellite imagers has been explained in literature such as K Arai (2007) and K J Thome (2001). Calibration of satellite sensors (imagers) is crucial for data consistency, reliability and comparability. To perform ... Read more
Can a robot improve mine safety?

Author: Green, JJ ; Bosscha, Peter A ; Candy, L ; Hlophe, K ; Coetzee, S ; Brink, S Date: Sep 2010 Safety in mines is of paramount importance, especially in the labour intensive operations of South Africa, where upward of 300 000 people are employed on a daily basis in an environment that is inherently dangerous. On average approximately ... Read more
Can draconian law enforcement solve the South African Road Safety crisis?

Author: Mohammed, SO ; Labuschagne, FJJ Date: Jul 2008 Traffic law enforcement has been defined as the area of activity aimed at controlling road user behaviour by preventive, persuasive and punitive measures in order to effect the safe and efficient movement of traffic. The Department of Transport ... Read more
Can existing South African air quality standards be applied to nanoparticles?

Author: Oosthuizen, MA ; Pretorius, E ; Oberholzer, HM ; Van der Spuy, WJ Date: Oct 2010 Particulates less than 100 nm (in at least one diameter) are referred to as nanoparticles. The properties of nanoparticles may differ from those of larger particles from the same bulk material. These unique properties allow the use of ... Read more
Can intraseasonal to decadal forecasts benefit from from consideration of lunar forcing?

Author: Malherbe, Johan ; Landman, WA ; Engelbrecht, FA Date: Oct 2014 A possible forcing mechanism for intra-seasonal rainfall distribution to bi-decadal climate variability is explored. The atmospheric response to external forcing is demonstrated at a daily and annual time scale by noting variation in the ... Read more
Can linear trend analyses of NDVI time series data truly detect land degradation? Simulations may provide the answer

Author: Wessels, Konrad J ; Van den Bergh, F ; Scholes, RJ ; Miteffa, S Date: Apr 2011 There has been a recent proliferation of remote sensing-based trend analysis for monitoring regional desertification. These show contradictory results. All of them claim to have been “validated” through expert interpretation, in the absence ... Read more
Can micro-volunteering help in Africa?

Author: Butgereit, L ; Botha, RA Date: May 2013 Micro-volunteering has been defined as convenient, bite-sized, crowdsourced, and network-managed. Micro-volunteers donate their time and energy for organisations which they may not have previously encountered (crowd-sourced), at a time which ... Read more
Can mine tremors be predicted? Observational studies of earthquake nucleation, triggering and rupture in South African mines

Author: Durrheim, RJ ; Ogasawara, H Date: May 2012 Mining-induced earthquakes pose a risk to workers in deep mines, while natural earthquakes pose a risk to people living close to plate boundaries and even in stable continental regions. A five-year ca. US$3 million Japan-SA collaborative ... Read more
“A can of worms”: Aerosol waste within the context of EPR, some insight from South Africa

Author: Muswema, Aubrey P ; Oelofse, Suzanna HH Date: Oct 2022 According to Extended Producer Responsibility (EPR) regulations, the paper and packaging sector needs to prepare EPR schemes for management of their end-of-life products. The aerosol sector recognises that aerosols present somewhat different ... Read more
Can SA afford to continue polluting its water resources? – With special reference to water pollution in two important catchment areas

Author: Roux, S ; Oelofse, Suzanna HH ; De Lange, Willem J Date: 01 Sep 2010 The reuse potential of industrial, agricultural and domestic return flows in any region is directly dependent on the quality of treatment processes and the intended reuse applications. Although the direct recycling of polluted water for potable ... Read more
Can solar -biogas hybrid systems be the solution to sustainable energy supply in rural areas?

Author: Tazvinga, Henerica ; Amigun, B ; Stafford, William HL ; Mapako, M Date: Apr 2011 Access to modern energy services is a fundamental prerequisite for property reduction and sustainable human development. Many remote rural South African communities are characterized by low energy demand and low population densities, making ... Read more
Can the South African address standard (SANS 1883) work for small local municipalities?

Author: Coetzee, S ; Cooper, Antony K Date: Oct 2008 The standard defines eleven address types that describe all forms of addresses currently in use in South Africa. The entity relationship diagram (ERD) in SANS 1883-2 includes no fewer than 26 tables and approximately 60 relationships between ... Read more
Capacity modelling of the coal value chain at Sasol Coal Supply

Author: Harmse, M ; Janse Van Rensburg, SJ Date: May 2007 Sasol, a petrochemical company in the Republic of South Africa, uses coal to produce oil and chemical products. The coal is mined in the area surrounding the Sasol plants and is transported with conveyor belts to the stockpiles at the gas ... Read more

Now showing items 580-599 of 5732

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