https://commons.ufh.ac.za/vital/access/manager/Index en-us 5 https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42926 Wed 26 May 2021 15:48:12 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42919 Wed 26 May 2021 15:20:13 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42795 Wed 19 May 2021 13:29:25 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42796 Wed 19 May 2021 11:16:24 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42922 Wed 19 May 2021 10:55:23 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42893 Wed 19 May 2021 10:20:31 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42797 Wed 19 May 2021 09:34:40 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42925 Wed 15 May 2024 19:18:09 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42788 Wed 12 May 2021 15:10:35 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42948 Wed 12 May 2021 15:07:02 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42947 Wed 12 May 2021 15:03:57 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42855 0.05, R2 = 0.95) between moderate-intensity physical activity and total physical activity levels. High levels of weekly sedentary behaviour and sitting time (302.60 ± 169.96 minutes) were reported. A weak, non-significant, positive correlation was found between total sedentary time and BMI (p>0.05, R2 = 0.1). A weak, non-significant, negative correlation was found between age and sedentary time (p>0.05, R2 = 0.002). More participants below 50 years were insufficiently active compared to above the age of 50 years. 1.7 to 2.6 years since diagnosis saw the greatest number of insufficiently active survivors and the category over 2.6 years since diagnosis saw the most active survivors. Most breast cancer survivors (71.10% & 82.05%) indicated being interested in and feeling capable of participating in an exercise programme (p>0.05, R2 = 0.72). The favoured preference for receiving physical activity advice was face-to-face with an exercise specialist at a cancer centre before treatment. Participation preferences included starting a programme immediately after treatment, in a home-based setting with one or two other people, where walking and a moderate exercise intensity were the preferred exercise type and level of intensity. Data collection occurred both immediately prior to (42% of participants) and during (56% of participants) the South African Covid-19 lockdown, so the results should be seen in light of this context. Conclusion: The current study is one of the first to explore physical activity rates and preferences of South African breast cancer survivors. As a group and individually these survivors were meeting public physical activity guidelines and engaging in the recommended weekly minutes. The high sitting time coupled with the high overweight and obesity levels highlight the need for positive behavioural changes including improved levels of physical activity and reduced sedentary behaviour. These changes need involvement from the numerous levels of society that affect health. Broad physical activity guidelines need to be developed not only to improve physical activity levels in breast cancer survivors but to work as a preventative measure by facilitating physical activity promotion in the general population. The findings of this study demonstrate that this group of South African breast cancer survivors is open to physical activity advice, to programmes and to improving physical activity levels.]]> Wed 12 May 2021 15:00:22 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42946 Wed 12 May 2021 14:59:40 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42918 Wed 12 May 2021 14:59:28 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42808 Wed 12 May 2021 14:57:50 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42940 Wed 12 May 2021 14:54:05 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42812 Wed 12 May 2021 14:53:53 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42809 Wed 12 May 2021 14:49:21 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42763 Wed 12 May 2021 14:49:18 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42482 Wed 12 May 2021 14:47:22 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42934 0.5). The model also performed generally well compared to established models that had been previously applied in some of the study catchments. The highest sediment yields recorded per country were 153 t km-2 year-1 (Tsitsa River; South Africa), 90 t km-2 year-1 (Odzi River; Zimbabwe) and 340 t km-2 year-1 (Rio Tanama; Puerto Rico). The results also displayed consistent underestimations of peak sediment yield events, partly attributed to sediment emanating from gullies that are not explicitly accounted for in the WQSED model structure. Furthermore, the calibration process revealed that the WQSED storage model is generally challenging to calibrate. An alternative simpler version of the storage model was easier to calibrate, but the model may still be challenging to apply to catchments where calibration data are not available. The additional evaluation of the WQSED simulated sediment yield rates against observed reservoir sediment rates showed a broad range of differences between the simulated and observed sediment yield rates. Differences between WQSED simulated sediment and observed reservoir sediment ranges from a low of 30% to a high of > 40 times. The large differences were partly attributed to WQSED being limited to simulating suspended sediment from sheet and rill processes, whereas reservoir sediment is generated from more sources that include bedload, channel and gully processes. Nevertheless, the model simulations replicated some of the regional sediment yield patterns and are assumed to represent sheet and rill contributions to reservoir sediment in selected catchments. The outcome of this study is an improved WQSED model that has successfully undergone preliminary testing and evaluation. Therefore, the model is sufficiently complete to be used by independent researchers and water resources managers to simulate erosion and sediment transport. However, the model is best applicable to areas where some observed data or regional information are available to calibrate the storage components and constrain model outputs. The report on potential MUSLE scale dependencies is relevant globally to all studies applying the MUSLE model and, therefore, can improve MUSLE application in future studies. The WQSED model offers a relatively simple, effective and applicable tool that is set to provide information to enhance catchment, land and water resources management in catchments of Africa.]]> Wed 12 May 2021 14:47:01 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42950 Wed 12 May 2021 14:46:17 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42952 Wed 12 May 2021 14:42:52 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42845 Wed 12 May 2021 14:41:23 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42485 Wed 12 May 2021 14:40:35 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42810 Wed 12 May 2021 14:39:44 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42806 Wed 12 May 2021 14:38:27 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42899 Wed 12 May 2021 14:33:05 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42927 Wed 12 May 2021 14:30:46 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42804 Wed 12 May 2021 14:28:35 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42847 Wed 12 May 2021 14:24:55 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42480 0:5 h Mpc-1. We also found that the foreground leakage is worse when edge antennas are included, as they have a more different primary beam compared to antennas at the centre of the array. The leakage magnitude is worse when bright foregrounds appear in the antenna sidelobes, as expected. Our simulations provide a useful framework to interpret observations and assess which power spectrum region is expected to be most contaminated by foreground power leakage.]]> Wed 12 May 2021 14:24:29 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42941 Wed 12 May 2021 14:21:45 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42953 Wed 12 May 2021 14:19:06 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42949 Wed 12 May 2021 14:17:52 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42490 Wed 12 May 2021 14:17:03 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42782 Wed 12 May 2021 14:11:52 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42945 Wed 12 May 2021 14:09:14 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42944 Wed 12 May 2021 14:03:03 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42805 Wed 12 May 2021 13:55:36 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42892 Wed 12 May 2021 13:52:10 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42942 Wed 12 May 2021 13:51:34 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42898 Wed 12 May 2021 13:51:19 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42897 Wed 12 May 2021 13:50:47 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42807 Wed 12 May 2021 13:48:55 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42943 Wed 12 May 2021 13:47:23 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42951 Wed 12 May 2021 13:46:56 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42939 Wed 12 Jul 2023 08:28:50 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42923 Wed 02 Jun 2021 11:43:12 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42920 Tue 25 May 2021 11:08:42 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42894 Tue 25 May 2021 11:01:45 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42790 Tue 25 May 2021 09:30:39 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42889 Tue 25 May 2021 09:02:40 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42791 Tue 25 May 2021 08:48:47 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42769 Tue 23 May 2023 11:45:11 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42928 Tue 18 May 2021 16:23:42 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42798 Tue 18 May 2021 15:55:51 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42930 Tue 18 May 2021 15:13:48 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42814 0.05; df = 2). However, mortalities were high and growth rates low, indicating that the rearing conditions were sub-optimal, possibly masking genetic differences. No significant differences were observed in oxygen consumption rates (ANOVA, P = 0.18; df = 2), and CTM (t-Test, P = 0.31; df = 3) between the two populations. The CTM for both populations was between 29 - 30℃. The farm trial yielded no significant differences in growth rate during the Nursery phase (t-Test, P = 0.25; df = 2), however significant differences in growth rate were observed during the grow out phase with the Central region abalone offspring growing faster than the Eastern edge population (t-Test, P = 0.04; df = 4) indicating the possibility of a genetic difference between the two populations. Further experiments will be required to determine whether the differences observed in the growth trial were genetically or environmentally induced.]]> Tue 18 May 2021 14:45:49 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42799 Tue 18 May 2021 14:24:43 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42800 Tue 18 May 2021 10:26:42 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42891 Tue 14 Feb 2023 07:55:10 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42760 Tue 01 Jun 2021 12:41:13 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42929 Tue 01 Jun 2021 12:27:15 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42767 Tue 01 Jun 2021 11:59:15 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42776 Thu 27 May 2021 15:12:47 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42921 Thu 20 May 2021 16:09:53 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42815 Thu 20 May 2021 15:27:51 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42792 Thu 20 May 2021 14:59:58 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42793 Thu 20 May 2021 12:25:52 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42794 Thu 20 May 2021 11:36:53 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42932 Thu 20 May 2021 09:23:52 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42937 4. The modeling methods used in the study were artificial neural network (ANN), linear regression (LR) and polynomial functions. The approach taken was to first test the modeling techniques on a single station before expanding the study to cover the regional aspect. The single station modeling was developed based on ionosonde data over Grahamstown. The inputs for the model which related to seasonal variation, diurnal variation, geomagnetic activity and solar activity were considered. For the geomagnetic activity, three indices namely; the symmetric disturbance in the horizontal component of the Earth’s magnetic field (SYM − H), the Auroral Electrojet (AE) index and local geomagnetic index A, were included as inputs. The performance of a single station model revealed that, of the three geomagnetic indices, SYM − H index has the largest contribution of 41% and 54% based on ANN and LR techniques respectively. The average correlation coefficients (R) for both ANN and LR models was 0.8, when validated during the selected storms falling within the period of model development. When validated using storms that fall outside the period of model development, the model gave R values of 0.6 and 0.5 for ANN and LR respectively. In addition, the GPS total electron content (TEC) derived measurements were used to estimate foF2 data. This is because there are more GPS receivers than ionosonde locations and the utilisation of this data increases the spatial coverage of the regional model. The estimation of foF2 from GPS TEC was done at GPS-ionosonde co-locations using polynomial functions. The average R values of 0.69 and 0.65 were obtained between actual and derived _foF2 over the co-locations and other GPS stations respectively. Validation of GPS TEC derived foF2 with RO data over regions out of ionospheric pierce points coverage with respect to ionosonde locations gave R greater than 0.9 for the selected storm period of 4-8 August 2011. The regional storm-time model was then developed based on the ANN technique using the four South African ionosonde stations. The maximum and minimum R values of 0.6 and 0.5 were obtained over ionosonde and GPS locations respectively. This model forms the basis towards the regional ionospheric storm-time index.]]> Mon 31 May 2021 15:12:57 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42895 Mon 31 May 2021 10:04:50 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42936 Mon 17 May 2021 15:55:32 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42801 Mon 17 May 2021 15:20:31 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42931 Mon 17 May 2021 13:00:31 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42890 Mon 17 May 2021 12:46:31 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42802 Mon 17 May 2021 12:32:33 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42924 Mon 17 May 2021 11:50:31 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42803 Mon 17 May 2021 11:08:34 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42774 Fri 28 May 2021 11:56:41 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42896 Fri 28 May 2021 11:35:51 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42933 Fri 28 May 2021 08:40:43 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42813 Fri 07 Jul 2023 05:18:53 SAST ]]>