https://commons.ru.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Black women’s narratives of womanhood: before and after hysterectomy https://commons.ru.ac.za/vital/access/manager/Repository/vital:30807 Wed 17 Jan 2024 13:06:29 SAST ]]> Combined spectral and stimulated luminescence study of charge trapping and recombination processes in α-Al2O3:C https://commons.ru.ac.za/vital/access/manager/Repository/vital:28235 Wed 15 Sep 2021 14:30:53 SAST ]]> A social realist study of employability development in engineering education https://commons.ru.ac.za/vital/access/manager/Repository/vital:28307 Wed 15 Sep 2021 14:03:01 SAST ]]> Building IKhwezi, a digital platform to capture everyday Indigenous Knowledge for improving educational outcomes in marginalised communities https://commons.ru.ac.za/vital/access/manager/Repository/vital:28200 Wed 15 Sep 2021 12:17:59 SAST ]]> Design of a dedicated IFT microcontroller https://commons.ru.ac.za/vital/access/manager/Repository/vital:30809 Wed 13 Mar 2024 10:54:08 SAST ]]> Biological activities of tulbaghia violacea against cryptococcus species https://commons.ru.ac.za/vital/access/manager/Repository/vital:32357 Wed 13 Mar 2024 10:12:28 SAST ]]> Approaches to detecting and assessing patterns, processes and responses to change in South African estuaries https://commons.ru.ac.za/vital/access/manager/Repository/vital:38621 Wed 12 May 2021 23:43:47 SAST ]]> An investigation of the teaching of reading in isiXhosa in three Grade 1 classrooms in the Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:28408 Wed 12 May 2021 23:41:05 SAST ]]> Energy use patterns and trends: the impact of energy policy in South African low-income households https://commons.ru.ac.za/vital/access/manager/Repository/vital:28148 Wed 12 May 2021 23:18:51 SAST ]]> Black South African men’s adjustment to divorce: a divorce-stress-adjustment model https://commons.ru.ac.za/vital/access/manager/Repository/vital:28543 Wed 12 May 2021 23:16:16 SAST ]]> A qualitative assessment of the achievement of gender equality under education for all (EFA) goals : study of Lagos State, Nigeria https://commons.ru.ac.za/vital/access/manager/Repository/vital:34357 Wed 12 May 2021 23:13:59 SAST ]]> Beneficiary perceptions regarding farm worker equity share schemes in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:33920 Wed 12 May 2021 23:03:58 SAST ]]> Estuarine microalgal bloom dynamics at multiple temporal scales https://commons.ru.ac.za/vital/access/manager/Repository/vital:29431 20 μg Chl-a l-1) were episodic and flow-dependent in the Gamtoos Estuary, whilst those in the Sundays Estuary were persistent and seasonal. Related to its reduced hydrodynamic variability – i.e. consistent nutrient-rich baseflows and reduced propensity for flushing events – persistent undesirable disturbances were highlighted for the Sundays Estuary, including: summer bottom-water hypoxia (< 2 mg l-1) and exceptional proliferations (> 550 μg Chl-a l-1) of two HAB species (Heterosigma akashiwo and Heterocapsa rotundata). Finally, fine-scale ecological research was undertaken in the Sundays Estuary to identify the processes – abiotic and biotic – that facilitate HABs (‘Daily’ and ‘Hourly’ studies). Findings from the ‘Daily’ study, identified inorganic nutrient availability (i.e. nitrate and phosphate) and mesohaline conditions (ca. 10) as the key bottom-up controls influencing the magnitude and duration of spring/summer phytoplankton blooms. Additionally, bottom-water hypoxia was explicitly linked to the decay of a single HAB species. During the ‘Hourly’ investigation, four known HAB-forming species were recorded at bloom concentrations. Model results indicated that variability in temperature, salinity profiles and nitrate concentrations were significant in facilitating the occurrence of HAB species. Finally, local biotic interactions (e.g. interspecies competition, diel vertical migration and mixotrophy) were recognized as key mechanisms shaping phytoplankton communities. The persistent occurrence of HABs is a new feature in South African estuaries and continued research is needed to recommend management responses. Ultimately, this research highlights the multitude of processes at work shaping phytoplankton variability in estuaries. From a broad perspective (i.e. seasonal and annual), processes such as freshwater inflow regimes, degree of anthropogenic disturbance, as well as seasonal temperature and nutrient supply patterns are the key processes. At a more refined scale (i.e. hourly and daily), local processes including salinity preferences, nutrient availability, diel light cycles and internal biotic interactions are the key drivers organising phytoplankton dynamics. Given the potentially severe ecological consequences of disrupting natural phytoplankton dynamics (e.g. HABs), an element of ‘unpredictability’ should be restored to the hydrological and chemical makeup of highly-regulated estuaries to prevent the continued exacerbation of eutrophic symptoms.]]> Wed 12 May 2021 23:00:12 SAST ]]> Anthropogenic effects on sustainability of fish biodiversity in Tyume River, Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:39102 Wed 12 May 2021 22:58:12 SAST ]]> Aspects of the population ecology, habitat use and behaviour of the endangered Knysna seahorse (Hippocampus capensis Boulenger, 1900) in a residential marina estate, Knysna, South Africa: implications for conservation https://commons.ru.ac.za/vital/access/manager/Repository/vital:26616 80 %) feeding, and morning courting behaviour for this species were confirmed. However, during the summer holiday period (mid-December to mid-January) few seahorses were observed on camera, which suggests that the increase in motor boat activity and the related increase in noise had a negative effect on H. capensis feeding and courting behaviour. The marina development, and in particular the Reno mattresses, created a new habitat for this endangered species within the Knysna estuary. In addition to the protection and restoration of natural habitats in which H. capensis is found, the conservation potential of artificial structures such as Reno mattresses should be realised.]]> Wed 12 May 2021 22:34:55 SAST ]]> An assessment study of the role of life orientation teachers in promoting career guidance and counselling of secondary school learners in the Vhembe district of Limpopo province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:34794 Wed 12 May 2021 22:23:04 SAST ]]> Analysis of the human HSP70-HSP90 organising protein (HOP) gene - characterisation of the promoter and identification of a novel isoform https://commons.ru.ac.za/vital/access/manager/Repository/vital:28296 Wed 12 May 2021 20:04:41 SAST ]]> Development of health promotion guidelines for weight management among primary health care nurses in the Eastern Cape Province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:35285 Wed 12 May 2021 19:43:47 SAST ]]> Advanced high speed data and clock transmission over optical fibre for square kilometre telescope array https://commons.ru.ac.za/vital/access/manager/Repository/vital:30935 Wed 12 May 2021 19:36:34 SAST ]]> A critical analysis of disaster risk management in local governance with reference to Sarah Baartman District Municipality https://commons.ru.ac.za/vital/access/manager/Repository/vital:33385 Wed 12 May 2021 19:31:26 SAST ]]> A strategy to enhance the role of the church as a social service delivery agent in fighting poverty in contemporary South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:28477 Wed 12 May 2021 19:31:26 SAST ]]> Code-switching as a pedagogical strategy in classroom settings: the case of township schools in a South African Metropolitan Municipality https://commons.ru.ac.za/vital/access/manager/Repository/vital:28173 Wed 12 May 2021 19:03:16 SAST ]]> Assessment of the human health implications of climate variability in East London, Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:35346 Wed 12 May 2021 18:50:44 SAST ]]> Donor support, electoral dynamics and democratisation in South Africa :the case of the Buffalo City Metropolitan Municipality, Eastern Cape https://commons.ru.ac.za/vital/access/manager/Repository/vital:37612 Wed 12 May 2021 18:48:27 SAST ]]> Critical assessment of the human resource capacity needs of senior management at Thaba Chweu Municipality in Mpumalanga Province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:39193 Wed 12 May 2021 18:48:05 SAST ]]> Elevated CO2 determines cell damage and nitrogen allocation in barley subjected to aphid herbivory https://commons.ru.ac.za/vital/access/manager/Repository/vital:28535 Wed 12 May 2021 18:46:25 SAST ]]> A best practice guideline for a healthy work environment for professional nurses working in the South African Military Health Service https://commons.ru.ac.za/vital/access/manager/Repository/vital:31146 Wed 12 May 2021 18:28:14 SAST ]]> An evaluation of state assisted human settlement development model: a case study of Duncan village and Reeston human settlement project in Buffalo city metropolitan municipality in the Eastern Cape. https://commons.ru.ac.za/vital/access/manager/Repository/vital:39709 Wed 12 May 2021 17:56:19 SAST ]]> A multi-stakeholder approach to productivity improvement in the South African construction industry https://commons.ru.ac.za/vital/access/manager/Repository/vital:28902 Wed 12 May 2021 17:54:31 SAST ]]> A characterization of landslide occurrence in the Kigezi Highlands of South Western Uganda https://commons.ru.ac.za/vital/access/manager/Repository/vital:33029 10 and TPI between -1 and 1. Landslides are less pronounced on slope zones where slope gradient is <15˚ and >45˚, profile curvature <0, TWI <8 and >18, SPI <10 and TPI >1. Deep soil profiles ranging between 2.5 and 7 meters are a major characteristic of the study area. Soils are characterized by clay pans at a depth ranging between 0.75 and 3 meters within the profiles. The study area is dominated by clay texture, except for the uppermost surface horizons, which are loamy sand. All surface horizons analysed had the percentage of sand, silt and clay ranging from 33 to 55%, 22 to 40% and 10 to 30% respectively. In the deeper horizons, sand was observed to reduce drastically to less than 23%, while clay increased to greater than 50%. The clay content is very high in the deeper horizons exceeding 35%. By implication, such soils with a very high clay content and plasticity index are considered as Vertisols, with a profound influence in the occurrence of landslides. The top soil predominantly contains more quartz, while subsurface horizons have considerable amounts of illite/muscovite as the dominant clay minerals, ranging from 43% to 47 %. The liquid limit, plasticity index, computed weighted plasticity index (PIw), expansiveness (ɛex) and dispersion ranging from 50, 22, 17, 10 and 23 to 66, 44,34,54 and 64, respectively also have strong implications for landslide occurrence. Landslides are not normally experienced during or immediately after extreme rainfall events but occur later in the rainfall season. By implication, this time lag in landslide occurrence and rainfall distribution, is due to the initial infiltration through quartz dominated upper soil layers, before illite/muscovite clays in the lower soil horizons get saturated. Whereas forest cover reduced from 40 % in 1985 to 8% in 2015, cultivated land and settlements increased from 16% and 11% to 52% and 25% respectively during the same period. The distribution of cultivated land decreased in lower slope sections within gradient group < 15˚ by 59%. It however increased in upper sections within gradient cluster 25˚ to 35˚ by over 85% during the study period. There is a shift of cultivated land to the steeper sensitive upper slope elements associated with landslides in the study area. More than 50% of the landslides are occurring on cultivated land, 20% on settlements while less than 15 % and 10% are occurring on grassland and forests with degraded areas respectively. Landslides in Kigezi highlands are triggered by a complex interaction of multiple- factors, including dynamic triggers and ground condition variables. Topographic hollows are convergence zones within the landscape where all the parameters interact to cause landslides. Topographic hollows are therefore potential and actual landslide sites in the study area. Characterized by deep soil horizons with high clay content dominated by illite/muscovite minerals in the sub soils and profile concave forms with moderately steep slopes, topographic hollows are the most vulnerable slope elements to landslide occurrence. The spatial temporal patterns of landslide occurrence in the study area has changed due to increased cultivation of steep middle and upper slopes. Characterized by deep soil horizons with high clay content dominated by illite/muscovite minerals in the sub soils and profile concave forms with moderately steep slopes, topographic hollows are the most vulnerable slope elements to landslide occurrence. The spatial-temporal patterns of landslide occurrence in the study area has changed due to increased cultivation of steep middle and upper slopes. A close spatial and temporal correlation between land use/cover changes and landslide occurrence is discernible. The understanding of these topographical, pedological and land use/cover parameters and their influence on landslide occurrence is important in land management. It is now possible to identify and predict actual and potential landslide zones, and also demarcate safer zones for community activities. The information generated about the area’s topographic, pedological and land cover characteristics should help in vulnerability mitigation and enhance community resilience to landslide hazards in this fragile highland ecosystem. This can be done through designating zones for community activities while avoiding potential landslide zones. It is also recommended that, tree cover restoration be done in the highlands and the farmers encouraged to re-establish terrace farming while avoiding cultivation of sensitive steep middle and upper slope sections.]]> Wed 12 May 2021 17:50:51 SAST ]]> Co-production of trust for effective local governance: a case study of the Nelson Mandela Bay Municipality https://commons.ru.ac.za/vital/access/manager/Repository/vital:29227 Wed 12 May 2021 17:43:59 SAST ]]> Development of a community pharmacy experiential learning programme in a South African context: a design research approach https://commons.ru.ac.za/vital/access/manager/Repository/vital:28353 Wed 12 May 2021 17:41:57 SAST ]]> An adaptive internet management model for higher education institutions in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:28331 Wed 12 May 2021 17:27:44 SAST ]]> Ethnicity, conflict and the developmental state in Rwanda https://commons.ru.ac.za/vital/access/manager/Repository/vital:35334 Wed 12 May 2021 17:25:23 SAST ]]> An investigation of the correlation of mitochondrial biogenesis, mitochondrial DNA methylation, mitochondrial network topology and adipogenesis in the human adipose-derived mesenchymal stromal stem cell model https://commons.ru.ac.za/vital/access/manager/Repository/vital:28222 Wed 12 May 2021 17:20:34 SAST ]]> Enhancing parental involvement in children’s academic work: Implications for teaching and learning https://commons.ru.ac.za/vital/access/manager/Repository/vital:31485 Wed 12 May 2021 17:09:38 SAST ]]> Antecedents and outcomes of service encounters in the restaurant industry in Zimbabwe https://commons.ru.ac.za/vital/access/manager/Repository/vital:32479 Wed 12 May 2021 16:31:53 SAST ]]> Chemical transformation and phytochemical studies of bioactive constituents from extract of callistemon citrinus (curtis) skeels https://commons.ru.ac.za/vital/access/manager/Repository/vital:34272 Wed 12 May 2021 16:28:14 SAST ]]> An intervention study for low risk pregnant women and high risk pregnant women with GDM in Buffalo City Metropolitan Municipality, Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:34891 Wed 12 May 2021 16:23:27 SAST ]]> A model of support for divorced professional nurses in the Eastern Cape, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:35293 Wed 12 May 2021 15:47:35 SAST ]]> Determinants of Type 2 diabetes mellitus among HIV/AIDS patients on antiretroviral drugs in the OR Tambo District, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:35976 Wed 12 May 2021 15:43:42 SAST ]]> Application of health belief model in developing contextual guidelines for adherence to antiretroviral treatment among adolescents and youths in Buffalo City Metropolitan Municipality District, East London, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:40472 Wed 12 May 2021 14:29:35 SAST ]]> Employee motivation, workplace surveillance and employee engagement among selected Zimbabwe revenue authority employees https://commons.ru.ac.za/vital/access/manager/Repository/vital:40961 Wed 12 May 2021 14:28:59 SAST ]]> 0 Representation of South African "tribal" culture in soap operas : a content and audience analysis of the series Generations : The Legacy https://commons.ru.ac.za/vital/access/manager/Repository/vital:40407 0.05). More than half of the respondents (52percent) strongly believe such negative portrayals may erode the cultural identity of black South Africans, 68.6% were of the opinion that Generations: The Legacy gives preference to western culture as against South African tribal culture. The findings further showed that the African values and traditions represented in Generations: The Legacy do not significantly reflect the South African tribal tradition and values (p-value > 0.05). In the few occasions that African traditional values are represented Generations: The Legacy, they tend to be portrayed as old fashioned (p-value > 0.05), and inferior and backward (p-value > 0.05). In addition, the findings indicate that Generations: The Legacy is a vehicle for promoting dominant culture. Nearly, 59percent of the respondents stated that watching Generations: The Legacy affect the way they view South African tribal culture, while 59.1percent indicated that watching Generations: The Legacy has somehow affected their perception of their own cultural identity. In all, participants rated the representation of South African tribal culture as poor. The study concludes that while South African tribal culture is increasingly finding expression on mainstream soap opera, tribal South African values and beliefs are often depicted as old-fashioned, and inimical to modernisation, and individual’s freedom.]]> Wed 12 May 2021 14:24:25 SAST ]]> Black South African men’s adjustment to divorce: a divorce-stress-adjustment model https://commons.ru.ac.za/vital/access/manager/Repository/vital:42048 Wed 12 May 2021 13:59:14 SAST ]]> An assessment of the implementation of small, medium and micro enterprise strategy : a case of Amathole Municipality https://commons.ru.ac.za/vital/access/manager/Repository/vital:40193 Wed 12 May 2021 13:57:46 SAST ]]> A critical assessment of the performance management system and its effect on service delivery : a case study of the Eastern Cape Department of Education https://commons.ru.ac.za/vital/access/manager/Repository/vital:40189 Wed 12 May 2021 13:56:10 SAST ]]> An appraisal of the role of cash and in-kind transfers in addressing urban household food insecurity in Bulawayo, Zimbabwe https://commons.ru.ac.za/vital/access/manager/Repository/vital:40191 Wed 12 May 2021 13:50:34 SAST ]]> A model for retention-to-graduation of undergraduate nursing students at universities in the Eastern Cape Province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:40566 Wed 12 May 2021 13:45:14 SAST ]]> A critical analysis of the establishment, conceptualisation, design and curriculum component selection of Master of Education programmes at selected Tanzanian universities https://commons.ru.ac.za/vital/access/manager/Repository/vital:28139 Wed 03 May 2023 14:17:38 SAST ]]> Baculovirus synergism: investigating mixed alphabaculovirus and betabaculovirus infections in the false codling moth, thaumatotibia leucotreta, for improved pest control https://commons.ru.ac.za/vital/access/manager/Repository/vital:28061 Tue 15 Aug 2023 11:05:18 SAST ]]> A review of Climate-Smart system innovations in two Agricultural Colleges in the North West Province of South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:28410 Thu 25 May 2023 15:03:12 SAST ]]> A critique of language policy and implementation strategies used in selected institutions of higher learning in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:28208 Thu 18 May 2023 15:27:00 SAST ]]> An assessment of the effect of implementation of performance management system on organizational performance : a case of selected public organizations in Tanzania https://commons.ru.ac.za/vital/access/manager/Repository/vital:35609 Thu 13 May 2021 16:46:00 SAST ]]> A social media model for public participation in a South African municipality https://commons.ru.ac.za/vital/access/manager/Repository/vital:30786 Thu 13 May 2021 13:38:18 SAST ]]> A critical analysis of organisational justice in the South African financial service industry https://commons.ru.ac.za/vital/access/manager/Repository/vital:32513 Thu 13 May 2021 08:52:29 SAST ]]> Co-Production of trust for effective local Governance: a case study of Nelson Mandela Bay Municipality https://commons.ru.ac.za/vital/access/manager/Repository/vital:29228 Thu 13 May 2021 08:14:39 SAST ]]> Aspects Allocentristes de l’Humanisme dans l’Univers Romanesque de Williams Sassine https://commons.ru.ac.za/vital/access/manager/Repository/vital:28089 Thu 13 May 2021 06:56:43 SAST ]]> Educators' perceptions of inclusive education for learners with physical disabilities https://commons.ru.ac.za/vital/access/manager/Repository/vital:34346 Thu 13 May 2021 06:19:12 SAST ]]> Assessment of the impact of land use practices on vegetation , soil and carbon-nitrogen sequestration potential in Mopane rangelands of Central Northern Namibia https://commons.ru.ac.za/vital/access/manager/Repository/vital:39100 0.05) between the three land management systems. Woody plant density of height classes were significantly different (P < 0.05) between three land management systems. The abundance of seedlings, saplings and young shrubs were significantly greater (P < 0.05) in the ranch than the game reserve and communal area. The mature trees had a significantly greater density (P < 0.05) in the game reserve than the ranch and communal area. Soil analysis results showed that Magnesium (Mg), Potassium (K), Manganese (Mn) and Copper (Cu) had similar (P > 0.05) concentrations in soils obtained from all land management systems in both seasons. Soil Calcium (Ca) levels showed differences between land management systems in winter only being greater (P < 0.001) in the game reserve than the ranch and the communal lands. Soil Phosphorus (P) and Iron (Fe) also showed variations between land management systems in winter being significantly greater (P < 0.001) in the ranch than the other land management systems. The concentration of soil K differed between the two seasons in soils collected from the ranch and the communal lands, being greater (P < 0.001) in winter than summer seasons. Soil Zinc (Zn) also showed differences between land management systems in summer being greater (P < 0.001) in the game reserve than in the ranch and communal land. Seasonal variations were observed in soil P level of samples collected from the ranch being greater (P < 0.001) in winter than summer season. The concentration of soil Zn was higher (P < 0.001) in the soil collected from the game reserve and the ranch in summer than winter season. Woody forage analysis results showed that browse samples harvested from the ranch had greater (P < 0.001) Nitrogen (N) level than the other land management systems in both seasons. The browse samples harvested from the game reserve had greater (P < 0.001) Ca level than the other land management systems in winter season only. The level of P showed variations (P < 0.05) between land management systems in samples harvested during winter only being greater (P < 0.001) in samples from the ranch than the other land management systems. Similarly, browse harvested during winter showed significant differences (P < 0.05) in K levels being lowest in samples collected from game reserves, where the Ca level was greatest. Browse samples collected from the communal land and the ranch had the lowest Mg levels in summer and winter seasons, respectively. In all management systems, browse harvested during summer had greater (P < 0.001) N and P levels than those harvested in winter, and the reverse holds true for K and Ca levels. Browse samples harvested during winter had greater (P < 0.001) Mn levels in samples from the communal area and game reserve than the ranch, but in summer, the game reserve had higher Mn level than the other two sites. Browse samples harvested during winter only showed differences (P < 0.05) in Cu and Zn levels being greatest (P < 0.001) in samples collected from ranch and game reserves. In all management systems, browse samples harvested during winter had greater (P < 0.001) Fe, Mn, Zn and Cu (except for the game reserve and communal land) levels than those harvested in summer. Herbaceous analysis results showed that samples harvested in summer from the game reserve and ranch had greater (P < 0.001) TOC levels than the communal area, but in winter, samples from the game reserve and ranch had similar TOC levels, except for communal areas that had no herbaceous vegetation. Herbaceous samples harvested in winter from the ranch had greater (P < 0.001) TN levels than the game reserve, and that made the C:N ratio higher (P < 0.001) in the game reserve. Woody foliar samples harvested in winter from the game reserve and communal lands had greater (P < 0.001) TOC than the ranch. Values on C:N ratio showed that in winter, the communal and ranch had greater (P < 0.001) C:N than the game reserve, but in summer, the ranch had higher (P < 0.001) C:N than the game reserve and communal area. The vegetation TOC (kg ha-1) showed the order of the game reserve > ranch > communal area and the trend was similar in both seasons. In summer, the game reserve had the greatest (P < 0.001) TN (kg ha-1) followed by the ranch and the lowest in the communal area, but in winter the game reserve and ranch had similar and higher (P < 0.001) TN (kg ha-1) than the communal areas. In summer, both the game reserve and ranch recorded greater (P < 0.001) herbaceous δ13C and lowest δ15N than the communal area, but in winter, the game reserve had higher (P < 0.001) δ13C than the ranch, though both the game reserve and ranch had similar (P > 0.001) δ15N values. In summer, both the communal and ranch had slightly higher (P < 0.001) woody foliar δ13C than the game reserve, but in winter the ranch had greater (P < 0.001) δ13C than game reserve and communal areas. Woody foliar samples harvested from the ranch showed variations (P < 0.05) in δ15N between seasons being higher (P < 0.001) in summer than winter. The TOC was greatest in summer, in soils collected from the game reserve followed by the ranch and least in the communal land, but in winter, the lowest TOC was recorded in soils collected from the ranch. The soil C:N ratio varied between land management systems in soils collected during summer only being greater (P < 0.001) in the game and ranch than the communal area. The soil TOC (kg ha-1) and TN (kg ha-1) did not show (P > 0.05) differences between land management systems. Soil δ13C level was remarkably (P < 0.05) affected by land management systems, but did not interact with seasons. In both seasons, the communal land had slightly higher (P < 0.001) δ13C level than the other two land management systems. In both seasons, δ15N levels showed great differences (P < 0.001) between land management systems, with highest soil δ15N levels observed in the communal area than the ranch and game reserve. Results on social survey showed that the majority of the interviewed households in Omaandi (63percent), Oshitutuma (53percent) and Epukunoyana (50percent) were female headed families and the remaining were male headed. The mean population of goats and cattle were significantly higher (P < 0.05) in Omaandi and Epukunoyana than in Oshitutuma village, respectively. In this study, household respondents in all villages indicated that all livestock species were primarily kept for wealth status and provision of meat for consumption. Respondents in all villages also indicated that lack of grazing lands and shortage of feed were the primary constraints of livestock production followed by water scarcity and recurring droughts. Elder respondents in all villages perceived overgrazing and climate change as the primary cause of rangeland degradation. Elder interviewees in Omaandi and Oshitutuma villages regarded low grass cover and dominance of poor quality grass (Epukunoyana only) as the primary vegetation indicators of rangeland degradation. The animal related indicators such as stunted animal body as a result of mineral deficiency, high livestock mortality, emaciated body and animals traveling long distance for grazing and water (Oshitutuma only) were regarded in all villages as the primary livestock related indicators of rangeland degradation. Elders from Epukunoyana village ranked low rainfall, high soil and atmospheric temperatures as the primary climate related indicators of rangeland degradation, although in Omaandi and Oshitutuma, high soil and atmospheric temperatures were considered as the primary climate related indicators of rangeland degradation. Based on the findings, this study concludes that land management systems had great influences on the distribution and production of herbaceous and woody vegetation in summer and winter seasons. This study also observed that land management systems interacted strongly with season to influence most vegetation and soil variables. Lastly, based on the study findings, the study concludes that all three communal rangelands are degraded and degradation led to a gradual declining trend in the livestock population over the past 10 to 20 years in the communal areas as a result of feed shortage.]]> Thu 13 May 2021 06:09:07 SAST ]]> Development and validation of a health literacy measure for limited literacy public sector patients in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:28227 Thu 13 May 2021 06:06:37 SAST ]]> A longitudinal investigation into employability : student transition and experiences from tertiary education into the labour market https://commons.ru.ac.za/vital/access/manager/Repository/vital:37015 Thu 13 May 2021 06:02:27 SAST ]]> Appraisal of wastewater final effluents and river water as reservoirs of cholera and non-cholera causing vibrio species : case study of the Amatole and OR Tambo District Municipalities https://commons.ru.ac.za/vital/access/manager/Repository/vital:35146 Thu 13 May 2021 05:52:33 SAST ]]> An investigation into the introduction of a new wealth tax in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:28020 Thu 13 May 2021 05:35:32 SAST ]]> Biotic and abiotic drivers of macroinvertebrate assemblages in a South African river https://commons.ru.ac.za/vital/access/manager/Repository/vital:28067 Thu 13 May 2021 05:31:56 SAST ]]> A framework for designing ambient assisted living services for disabled individuals https://commons.ru.ac.za/vital/access/manager/Repository/vital:31347 Thu 13 May 2021 05:31:19 SAST ]]> Detection of early warning signs of currency crises in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:30905 Thu 13 May 2021 05:30:53 SAST ]]> Bayesian spatial modelling of tuberculosis and its effects on socio-economic and demographic factors in South Africa : a case study of the Eastern Cape Province https://commons.ru.ac.za/vital/access/manager/Repository/vital:34813 Thu 13 May 2021 05:24:20 SAST ]]> Characterization and ecology of selected micro-estuaries and micro-outlets in the Eastern Cape province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:31640 Thu 13 May 2021 05:23:01 SAST ]]> Development of high capacity lithium-manganese-rich cathode materials xLi2MnO3•(1-x)LiMn0.5Ni0.5O2 for lithium ion batteries https://commons.ru.ac.za/vital/access/manager/Repository/vital:33442 Thu 13 May 2021 05:11:34 SAST ]]> A proposed sustainable funding framework for the public broadcaster in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:33379 Thu 13 May 2021 05:00:45 SAST ]]> Development of InSb/GaSb quantum dots by MOVPE https://commons.ru.ac.za/vital/access/manager/Repository/vital:30537 B ± 0.1ᵒ and (111) ± 0.1ᵒ] using similar growth conditions yielded a higher dot density on the (100) substrate compared to the (111) substrate. This was attributed to the presence of terraces/atomic steps induced by the misorientation on the (100) substrate, which invariably gives rise to increased adsorption and an enhanced sticking coefficient of adatoms. Studies on the influence of a buffer layer on the morphology of uncapped dots showed that the shape and size of the dots are sensitive to the thickness of the buffer layer. In some case a corrugated buffer surface resulted, which introduced order in the arrangement of the dots, which formed preferentially inside the troughs. An increase in the V/III ratio from 1.0 to 3.0 was found to reduce the areal density of the QDs, while an analysis of the diameter histograms showed a narrowing of the size distribution with an increase in V/III ratio. The larger size distribution at low V/III was ascribed to the increase in indium species and the increased indium adatom migration length. This leads to increased dot density and nucleation sites, and thus triggers an increase in the conversion of tiny QDs into thermodynamically more suitable larger dots via coalescence. However, as the V/III ratio increased, the number of indium adatoms available for growth on the surface reduced, which automatically led to a decrease in the migration length of indium species which is unfavourable for the production of nucleation sites and to a decrease in dot density. Low growth rates were found to be beneficial for the growth of a high density (~5×1010cm-2) of QDs. Photoluminescence (PL) analysis of the capped samples at low temperature (~10 K), using an excitation power of 2 mW, showed a PL peak at ∼732 meV. Upon an increase in laser power to 120 mW, a blue shift of ∼ 8 meV was noticed. This emission typically persisted up to 60–70 K. An increase in the number of InSb QD-layers, was observed to cause an increase in the luminescence spectral line width and a long-wavelength shift of the PL lines, together with an enhancement in the strength of the PL emission. However, high resolution transmission electron microscopy (HRTEM) of the capped dots revealed the formation of an InGaSb quantum well-like structure, ∼10 nm thick, which was responsible for the PL signal mentioned above. The absence of QDs in the capped sample was attributed to inter-diffusion of Ga and In during the deposition of the cap layer, giving rise to a quantum well (QW) instead of the intended QDs. The presence of threading dislocations and stacking faults were also observed in the TEM micrographs of the samples containing multilayers, which can account for the fast quenching of the PL emission with increasing temperature from these samples. Theoretical simulations of the band alignment, wave functions and energy levels were in good agreement with the data collected from the PL spectra of the samples.]]> Thu 13 May 2021 04:56:31 SAST ]]> Cross-Border Migration, Social Cohesion and African Continental Integration: Perspectives of African Immigrants and South African Nationals in Gauteng, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:33673 Thu 13 May 2021 04:51:26 SAST ]]> Effect of a participatory voter education programme on secondary school students' political knowledge and attitude in Ekiti State, Nigeria https://commons.ru.ac.za/vital/access/manager/Repository/vital:34355 Thu 13 May 2021 04:47:10 SAST ]]> Bioinformatics tool development with a focus on structural bioinformatics and the analysis of genetic variation in humans https://commons.ru.ac.za/vital/access/manager/Repository/vital:27820 Thu 13 May 2021 04:39:10 SAST ]]> Developing a model for promoting physical fitness and healthy lifestyle of primary school learners in the Eastern Cape Province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:35307 Thu 13 May 2021 04:09:41 SAST ]]> Compensation for distribution of timing and reference signals over optical fibre networks for telescope arrays https://commons.ru.ac.za/vital/access/manager/Repository/vital:33941 Thu 13 May 2021 04:07:46 SAST ]]> Active learning strategies used by teachers during English reading comprehension lessons in six selected primary schools in Nigeria https://commons.ru.ac.za/vital/access/manager/Repository/vital:32838 Thu 13 May 2021 03:55:05 SAST ]]> An investigation of the combustion kinetics of coal-microalgae composite https://commons.ru.ac.za/vital/access/manager/Repository/vital:33447 Thu 13 May 2021 03:47:57 SAST ]]> Biochemical characterisation and small molecule modulation of the interaction between two cytosolic Hsp70s from Trypanosoma brucei and potential co-chaperones https://commons.ru.ac.za/vital/access/manager/Repository/vital:28407 Thu 13 May 2021 03:42:47 SAST ]]> Development and evaluation of the coach-athlete relationship enhancement intervention https://commons.ru.ac.za/vital/access/manager/Repository/vital:29989 Thu 13 May 2021 03:41:22 SAST ]]> A best practice guideline for clinical teaching at a public college of nursing https://commons.ru.ac.za/vital/access/manager/Repository/vital:30860 Thu 13 May 2021 03:27:31 SAST ]]> Aspects of the nutritional physiology of the perlemoen Haliotis midae (L.) and red abalone H. rufescens (Swainson) https://commons.ru.ac.za/vital/access/manager/Repository/vital:28154 Thu 13 May 2021 02:39:01 SAST ]]> Assessing the Contribution of SMMEs to Job creation in the Eastern Cape South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:39690 Thu 13 May 2021 02:35:22 SAST ]]> Disputes, relationships and identity: analysing human-human conflicts as a basis for human-wildlife conflicts in the mid-Zambezi valley, northern Zimbabwe https://commons.ru.ac.za/vital/access/manager/Repository/vital:30934 Thu 13 May 2021 02:22:08 SAST ]]> A framework for improving construction workers’ health and safety practices in Lagos, Nigeria https://commons.ru.ac.za/vital/access/manager/Repository/vital:31235 Thu 13 May 2021 02:19:18 SAST ]]> A programme of academic support for students at the public nursing college of the Eastern Cape Province in South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:36128 Thu 13 May 2021 02:02:22 SAST ]]> Assessment of the host potential of TETROL [(+)-(2R,3R)-1,1,4,4- tetraphenylbutane-1,2,3,4-TETROL] for the separation of isomers and related compounds https://commons.ru.ac.za/vital/access/manager/Repository/vital:29817 m-toluidine > o-toluidine) and the cresols (p-cresol > m-cresol > o-cresol). Each guest mixture was selected based on data from experiments using either the industrial significance of its separation or because the mixture would add to the knowledge base of the host compound’s preferences and selectivities. In a separate study, TETROL and its derivative, (–)-(2R,3R)-2,3-dimethoxy-1,1,4,4- tetraphenylbutane-1,4-diol (DMT), were also allowed to compete for the inclusion of the guest cyclohexanone, where TETROL demonstrated superior ability. This host, in addition, showed potential for the separation of cis- and trans- 2-methylcyclohexanol.]]> Thu 13 May 2021 01:55:11 SAST ]]> Advanced radio interferometric simulation and data reduction techniques https://commons.ru.ac.za/vital/access/manager/Repository/vital:26875 Thu 13 May 2021 01:03:59 SAST ]]> Evaluating selected enterprises for sustainable social development in South Africa :|ba case study of Buffalo City Municipality, Eastern Cape https://commons.ru.ac.za/vital/access/manager/Repository/vital:35825 Thu 13 May 2021 00:45:59 SAST ]]> Engagement of fathers in early childhood care and education provisioning in one education district in the Eastern Cape Province, South Africa https://commons.ru.ac.za/vital/access/manager/Repository/vital:34175 Thu 13 May 2021 00:45:22 SAST ]]> AP-MOVPE growth and characterisation of GaSb/GaAs quantum dots https://commons.ru.ac.za/vital/access/manager/Repository/vital:34047 Thu 13 May 2021 00:29:28 SAST ]]> A performance metric system for the long-term sustainability of a multi-national enterprise https://commons.ru.ac.za/vital/access/manager/Repository/vital:30575 Thu 13 May 2021 00:28:29 SAST ]]> Dimensions of a memorable experience within a marine tourism context https://commons.ru.ac.za/vital/access/manager/Repository/vital:30958 Thu 13 May 2021 00:22:00 SAST ]]> A psychobiographical study of Temple Grandin https://commons.ru.ac.za/vital/access/manager/Repository/vital:26877 Thu 01 Jun 2023 11:15:19 SAST ]]> An investigation into the bacterial biosynthetic origins of bioactive natural products isolated from South African latrunculid sponges https://commons.ru.ac.za/vital/access/manager/Repository/vital:28065 Mon 05 Jun 2023 15:41:21 SAST ]]> An analysis of the implementation of the Teaching Development Grant in the South African Higher Education Sector https://commons.ru.ac.za/vital/access/manager/Repository/vital:28141 Fri 23 Jul 2021 12:25:01 SAST ]]> Behaviour of quiet time ionospheric disturbances at African equatorial and midlatitude regions https://commons.ru.ac.za/vital/access/manager/Repository/vital:28228 Fri 17 Sep 2021 14:51:46 SAST ]]> Bacterial colonisation and degradation of geologically weathered and discard coal https://commons.ru.ac.za/vital/access/manager/Repository/vital:28043 Fri 17 Sep 2021 11:42:47 SAST ]]> Decentralization and quality assurance in the Ugandan primary education sector https://commons.ru.ac.za/vital/access/manager/Repository/vital:26897 Fri 06 Aug 2021 09:57:38 SAST ]]>