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A comparison of web-based technologies to serve images from an Oracle9i database

- Swales, Dylan

Authors: Swales, Dylan
Date: 2004 , 2013-06-18
Subjects: Active server pages , Microsoft .NET , JavaServer pages , Oracle (Computer file) , Internet searching , Web site development--Computer programs , World Wide Web , Online information services
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:4583 , http://hdl.handle.net/10962/d1004380 , Active server pages , Microsoft .NET , JavaServer pages , Oracle (Computer file) , Internet searching , Web site development--Computer programs , World Wide Web , Online information services
Description: The nature of Internet and Intranet Web applications has changed from a static content-distribution medium into an interactive, dynamic medium, often used to serve multimedia from back-end object-relational databases to Web-enabled clients. Consequently, developers need to make an informed technological choice for developing software that supports a Web-based application for distributing multimedia over networks. This decision is based on several factors. Among the factors are ease of programming, richness of features, scalability, and performance. The research focuses on these key factors when distributing images from an Oracle9i database using Java Servlets, JSP, ASP, and ASP.NET as the server-side development technologies. Prototype applications are developed and tested within each technology: one for single image serving and the other for multiple image serving. A matrix of recommendations is provided to distinguish which technology, or combination of technologies, provides the best performance and development platform for image serving within the studied envirorunent. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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Date Issued: 2004

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Agriculture as a contributor to local economic development (LED) in Nkonkobe Local Municipality

- Rali, Jongikhaya

Authors: Rali, Jongikhaya
Date: 2013
Subjects: Agricultural development projects -- South Africa -- Eastern Cape , Poverty -- Economic aspects -- South Africa -- Eastern Cape. , Job creation
Language: English
Type: Thesis , Masters , MA
Identifier: vital:9201 , http://hdl.handle.net/10948/d1020402
Description: Africa while being underdeveloped in terms of industry and infrastructure has much rural land and therefore has significant potential to provide global food security. This study investigates agriculture as a contributor to economic development of Nkonkobe Local Municipality, Eastern Cape, South Africa. While the potential of agriculture, in Nkonkobe Local Municipality is high, this sector has not been fully developed to the benefit of the community and the municipality at large. The results of this study have pointed out that the Eastern Cape, Nkonkobe Local Municipality in particular is where communal farming is practiced on the largest scale and where further growth can take place. This study is informed by the goals of reconstruction and development, as expressed in the Government’s Reconstruction and Development Programme (1995) tabled to meet the basic needs of the people, develop its human resources and to build the local economy. This study aims to transform Nkonkobe Local Municipality into an economically developed area of Amathole District Municipality, by improving the area’s agricultural contribution to the Local Economic Development (LED) of the area. This study supports entrepreneurship and innovation, job creation, raising the quality of basic services to the poorest citizens of Nkonkobe Local Municipality, and increasing the distribution of agricultural land to small holders. This study promotes the development of agricultural sector, which will enable it to absorb more low skilled labour which will assist in poverty alleviation, and promote LED initiatives. This study also develops and promotes the sustainable contribution of agriculture to LED programmes, and improves the participation of local communities in these programmes. The study was conducted using qualitative research methodology. The findings of the study reveal that agricultural infrastructure in support of LED in Nkonkobe Local Municipality must be established and improved. Such infrastructure should include the reticulation of services, such as irrigation schemes, big dams, farming equipment, tractors, laboratories, cold storages and communication links. These services are currently inadequate in the area, and hamper development and progress that the area clearly has great potential to add in terms of global food security and poverty alleviation.
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Date Issued: 2013

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The acute impact of extended aerobic exercise on cognitive performance

- Tichiwanhuyi, Tendayi Stephen

Authors: Tichiwanhuyi, Tendayi Stephen
Date: 2015
Subjects: Aerobic exercises , Cognition -- Effect of exercise on , Exercise -- Physiological aspects , Exercise -- Psychological aspects , Visual perception , Short-term memory , Motor ability , Human information processing
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:5173 , http://hdl.handle.net/10962/d1018182
Description: Previous research has established a relationship between exercise and cognition, with more emphasis on this ascertained link, being made on the effects of long term and endurance exercise on cognition. However, enhanced worker effectiveness relies on a strong acute collaboration of physical and cognitive performance during task execution. As a result, the purpose of this study was to examine the acute effects of extended aerobic exercise on visual perception, working memory and motor responses, and to achieve this 24 participants (12 males and 12 females) aged between 18 and 24 participated in a 2 bout cycling exercise. The experimental condition had cycling resistance set at 60 percent of each individual’s maximum aerobic output and the control condition had zero cycling resistance, where three cognitive tasks were performed at 10 minute intervals during the cycling exercise. The results showed that exercise did not affect any significant changes on the cognitive performance measures over the entire cycling duration, as well as during the exercise phase (cycling with resistance). However, visual perception improved significantly (p<0.05) immediately after exercise. This led to the conclusion that moderate to high intensity exercise when performed for an extended duration, has selective effects on certain cognitive performance measures, with the time at which the performance is measured during the exercise being a relevant factor to be considered for maximum activation effects of the exercise.
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Date Issued: 2015

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Investigation into the technical feasibility of biological treatment of precious metal refining wastewater

- Moore, Bronwyn Ann

Authors: Moore, Bronwyn Ann
Date: 2013
Subjects: Sewage -- Purification -- Biological treatment -- South Africa Sewage -- Purification -- Activated sludge process -- South Africa Water reuse -- South Africa Flotation -- South Africa Platinum mines and mining -- Waste disposal -- South Africa Platinum mines and mining -- Economic aspects -- South Africa Mine water -- Environmental aspects -- South Africa Platinum mines and mining -- Waste minimization -- South Africa
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:3888 , http://hdl.handle.net/10962/d1002013
Description: The hydrometallurgical refining of platinum group metals results in large volumes of liquid waste that requires suitable treatment before any disposal can be contemplated. The wastewater streams are characterized by extremes of pH, high inorganic ion content (such as chloride), significant residual metal loads and small amounts of entrained organic compounds. Historically these effluents were housed in evaporation reservoirs, however lack of space and growing water demands have led Anglo Platinum to consider treatment of these effluents. The aim of this study was to investigate whether biological wastewater treatment could produce water suitable for onsite reuse. Bench-scale activated sludge and anaerobic digestion for co-treatment of an acidic refinery waste stream with domestic wastewater were used to give preliminary data. Activated sludge showed better water treatment at lab scale in terms of removal efficiencies of ammonia (approximately 25%, cf. 20% in anaerobic digestion) and COD (70% cf. 43% in digestion) and greater robustness when biomass health was compared. Activated sludge was consequently selected for a pilot plant trial. The pilot plant was operated on-site and performed comparably with the bench-scale system, however challenges in the clarifier design led to losses of biomass and poor effluent quality (suspended solids washout). The pilot plant was unable to alter the pH of the feed, but a two week maturation period resulted in the pH increasing from 5.3 to 7.0. Tests on algal treatment as an alternative or follow-on unit operation to activated sludge showed it not to be a viable process. The activated sludge effluent was assessed for onsite reuse in flotation and it was found that there was no significant difference between its flotation performance and that of the process water currently used, indicating the effluent generated by the biological treatment system can be used successfully for flotation. Flotation is the method whereby minerals refining operations recover minerals of interest from ore through the addition of chemicals and aeration of the ore slurry. Target minerals adhere to the bubbles and can be removed from the process.
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Date Issued: 2013

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An evaluation of the brand campus concept implemented at Mercedes-Benz South Africa: a case study

- Samkange, Tichaona

Authors: Samkange, Tichaona
Date: 2009
Subjects: Mercedes-Benz of South Africa DaimlerChrysler -- South Africa Consumer satisfaction Case studies -- South Africa Product management Case studies -- South Africa Brand name products -- Management Case studies Brand name products -- Valuation Case studies Marketing Case studies -- South Africa Brand choices Case studies -- South Africa Customer preferences Case studies -- South Africa
Language: English
Type: Thesis , Masters , MBA
Identifier: vital:741 , http://hdl.handle.net/10962/d1003861
Description: Primarily, this research study was concerned with the evaluation of the brand campus concept implemented at then DaimlerChrysler South Africa in 2002, as a case study. Pretoria-based Mercedes-Benz South Africa (Pty) Ltd. (MBSA) is a subsidiary of global vehicle manufacturer Germany’s Daimler-Benz AG (DBAG). They are responsible for assembling, distributing and retailing, certain Mercedes-Benz and Mitsubishi vehicle brands, and spare parts. The landmark 1998 DaimlerChrysler global ‘merger of equals’ was preceded by the 1995 joint venture between Mercedes-Benz and Mitsubishi Motor Corporation. Consequently, three brands (Mercedes-Benz, Chrysler and Mitsubishi) were retailed and marketed under DaimlerChrysler South Africa (Pty) Ltd. (DCSA), positioned next to each other in the same showroom. This report identifies key challenges stemming from this approach, namely: brand strength dilution, more than 80 multi-franchised dealers and multi-branded showrooms, service capacity problems, old working environment and infrastructure, and perceived intra-brand competition. The research evidence suggests that these problems prompted then DCSA to launch the 2000 Dealer Network Strategy (DNS). In the grand scheme of things, the DNS intervention entailed partitioning the dealer network into five brand centres in five metro regions, and eighteen market centres in the rural areas. The brand campus concept was borne out of DNS and proved to be a masterstroke since, the primary focus was on streamlining the retail facilities for DCSA vehicle sales, service and spare parts for both the passenger and commercial vehicles. This study highlights key pillars of the brand campus concept, namely: profitability, brand focus, customer orientation and diversity. The challenge was to address seven major drivers of the brand campus concept, namely: after-sales vehicle support, vehicle service capacity, lead-times, spare parts availability, sales information propagation, behavior of sales personnel and the overall vehicle dealership appearance. Semi-structured interviews constituted part of the evaluation based on the perspectives of five customers, three dealer principals and two MBSA marketing executives. The research evidence, which also came from MBSA documentation and direct observation, shows that this innovative concept has been remarkably successful.
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Date Issued: 2009

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Union restructuring

- CWIU

Authors: CWIU
Date: 1993
Subjects: CWIU
Language: English
Type: text
Identifier: http://hdl.handle.net/10962/178882 , vital:43007
Description: The idea to restructure the union is not a new one. Political changes in our country compelled almost all the unions to consider the possibilities of restructuring the union and the industry in general. New approaches to Collective Bargaining Strategies came to the fore. The good example of these Bargaining strategies was the NUMSA THREE YEAR BARGAINING STRATEGY (1993). Later in the same year, CWIU also introduced its Bargaining Strategy in the form of five pillars. The common thing about Numsa and CWIU bargaining strategies is that they both failed to deliver and the process of setting up working groups are more complex than expected. The main cause of the tap problem in my view is that the existing union structures are a big deterent to the development and implementation of new bargaining strategies. Our Centralised Bargaining victory and the new LRA will demand major union restructuring if we want to utilise the openings created by these new developments. In this discussion paper, I will focus on how we should restructure our union. In this paper, I am suggesting that the union (CWIU) must be made up of four semi-autonomous departments.
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Date Issued: 1993

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Colour vision of the citrus psylla Trioza erytreae (Del Guercio) (Homoptera: Psyllidae) in relation to alightment colour preferences

- Urban, Alan Joseph

Authors: Urban, Alan Joseph
Date: 1977
Subjects: Trioza , Homoptera , Jumping plant-lice , Color vision
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:5885 , http://hdl.handle.net/10962/d1013286
Description: The colour vision of adult citrus psylla, Trioza erytreae, was investigated in the laboratory using the behavioural parameters: alightment and walking. Light green flushing leaves (under which the nymphs develop) were significantly preferred, visually, to dark green mature leaves for alightment. Diffuse reflectance spectroscopy showed (when expressed in the parameters of human colour vision) that flush has a very slightly longer dominant wavelength, and roughly double the reflectance and purity. Alightrnent frequency correlated almost equally well with "purity" (as noted by Moericke, 1952 et seq., in "yellow-sensitive" aphids) as with the aphidological colour parameter "long/short ratio" developed by Kennedy et al. (1961). Elucidation of the mechanism underlying the citrus psylla's alightment colour preference was initially attempted with a printed spectrum and several paint series of measured spectral characteristics. It was clear that T.erytreae belongs to the "yellow-sensitive" group of Homoptera, but it was impossible to distinguish which pararneter(s) of colour the psyllids were responding to. Phototactic (walking) response to the individual parameters of colour was therefore measured using a monochromator. The phototactic action spectrum (against wavelength) was tri-modal, with peaks in the yellow-green (YG), blue (B), and ultra= violet (UV). Rate of phototaxis was not influenced by bandwidth (roughly equivalent to purity), but was proportional to intensity (roughly equivalent to reflectance). To investigate the influence of the above three wavelength regions on alightment, use was made of a very simple flight chamber incorporating a target of coloured light. Yellow-green and UV light both independently stimulated alightment . Their effect was additive. Different thresholds indicated distinct YG and UV receptor systems. Blue light alone did not stimulate alightment, and was strongly alightment-inhibitory in combination both with YG and with UV light. On the basis of the above physiological/behavioural findings, a new alightment formula was drawn up for describing the hamopteran's apparent manner of alightment determining integration of surface reflectance. The flush preference and alightment distributions on the series of artificial surfaces were found to correlate slightly more accurately, on average, as well as more consistently, with the new formula than with previously-available colour parameters. These findings are placed in perspective to the literature, and their possible economic relevance is discussed.
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Date Issued: 1977

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The development of sustainability criteria to facilitate the selection of sanitation technologies within the Buffalo City Municipality (Eastern Cape Province, South Africa)

- Hoossein, Shafick

Authors: Hoossein, Shafick
Date: 2009
Subjects: Sanitation -- South Africa -- Buffalo City Sustainable development -- South Africa -- Buffalo City Water -- Purification -- South Africa -- Buffalo City Sewage disposal -- South Africa -- Buffalo City Water quality -- South Africa -- Buffalo City Environmental health -- South Africa -- Buffalo City Environmental management -- South Africa -- Buffalo City
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:32275 , http://hdl.handle.net/10962/d1004595
Description: Two and a half billion people mostly in sub-Saharan Africa and southern Asia remain without improved sanitation facilities despite the Millennium Development Goal 7's target to halve this number by 2015. While it might be tempting for developing countries such as South Africa to implement the cheapest and most rapidly constructed sanitation services simply to meet the desired target, this could have significant negative implications on human health and the environment over the long-term. As a result, there is a need to ensure that the most appropriate sustainable sanitation technologies are selected during the planning stage. The purpose of this research was therefore to document the development and pilot application of a flexible context-specific decision-support tool for sustainable sanitation technology selection within Buffalo City Municipality (BCM) in the Eastern Cape Province of South Africa. The first step in the development process was to ascertain the current status of sanitation within the municipality, with a specific focus on the main challenges related to the provision, maintenance and performance of these technologies. Thereafter, a participatory approach was employed involving BCM stakeholders to develop a series of sustainability criteria and indicators that took into consideration economic, social, environmental and technical concerns as well as legal requirements. The development process resulted in a list of 38 BCM sustainable sanitation selection criteria that were applied in a pilot study involving rural, urban and peri-urban communities within BCM. Certain criteria related to topographical features and the availability of piped water and land were considered useful for 'coarse screening' while others were applied during 'fine screening'. In order to enhance the context specificity of criteria, each was weighted, through consultation with key BCM stakeholders. This research confirmed that the sanitation situation in BCM was poor and preliminary evidence indicated that sanitation systems were negatively impacting on the quality of water resources within BCM justifying the need for a sustainable sanitation decision support tool. Based on the pilot application of the BCM Sustainability Selection Criteria List, the urine diversion technology was considered the most sustainable technology option in each study site. There were however, certain social criteria that received relatively low sustainability scores and these would need to be addressed prior to the approval of this technology for implementation. The approach adopted in this thesis was considered highly context-specific yet flexible and appropriate for adoption not only by BCM but other municipalities on a range of spatial scales.
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Date Issued: 2009

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Identification of differentially expressed proteins involved in wheat (Triticum aestivum) resistance against Russian Wheat Aphid (Diuraphis noxia) SA2 using SWATH-MS analysis

- Ntlokwana, Sitha Emmanuel

Authors: Ntlokwana, Sitha Emmanuel
Date: 2020
Language: English
Type: Thesis , Masters , MSc
Identifier: http://hdl.handle.net/10353/18872 , vital:42888
Description: Wheat (Triticum aestivum) is the second most-consumed cereal crop in the world, second only to maize. In South Africa it is mainly produced in three provinces; the Free State, Western Cape, and the Northen Cape. The average total land area used for wheat cultivation in these three Provinces, is 533 000 hectares, with a resultant annual production of between 1.3 to 2 million tons. The total wheat requirement in South Africa is currently 2.7 million tons according to the production of wheat guidelines published by the Department of Agriculture, Forestry and Fisheries, which is higher than the total annual production. One of the primary reasons that contribute to the lower production levels is insect and pest infestation, in particular, the Russian wheat aphid (Diurophis noxis), which can result in crop loss of up to sixty percent. Russian wheat aphids (RWA) are invasive insects that feed on the phloem of the plant through their specialised thin stylet-like mouthparts and release toxic agents contained in their saliva during feeding, which disrupt cellular functions inside the host plant. This damage leads to symptoms like; chlorosis, necrosis, wilting, stunting and curling of leaves, also known as leaf rolling. This study aimed to identify differentially expressed proteins in resistant and susceptible wheat (Triticum aestivum) cultivars during Russian wheat aphid Biotype South African 2 (RWA-SA2) infestation, in order to identify proteins involved in the wheat resistant mechanism against RWA-SA2. Two wheat cultivars SST398 (resistant to RWA-SA2) and SST356 (susceptible to RWA-SA2) were used, and a total number of 126 plants were planted and divided according to four different harvest times (Control day 0; day 5; day 7 and day 12). The wheat plants were infested with approximately 10 aphids per plant at the three-leaf stage, and placed within an insect cage inside a growth chamber (Conviron, Winnipeg, Canada) set at 24ºC, light intensity of 352 µmol.m-2.sec-1, ambient CO2 levels (410 ppm) and humidity of 60% with a 16h/8h day/night cycle. Wheat leaves were harvested at various time frames, and total protein extraction was performed. The protein samples were reduced with 10 mM dithiothreitol (DTT) and alkylated with 30 mM iodoacetamide (IAA). Sample clean-up and on-bead trypsin digest were performed on megReSyn Hilic columns, over four hours. The resultant peptides were vacuum dried and resuspended in 2% acetonitrile (ACN) before submitting them to LC-MS/MS (SWATH) for analysis. A total number of 611 proteins were differentially expressed, of which 19 were identified to be involved in the resistance response of wheat, and an additional 20 involved in biotic stress responses. This study showed that reactive oxidative species (ROS) such as hydrogen peroxide and hydroxyl radicals (OH-) play a significant role in the early stages of wheat resistance against RWA-SA2 infestation. They are involved in cell wall strengthening, activation of defence genes, involvement of phytohormone signals such as salicylic and jasmonic acid, which also mediates the systemic defences such as, systemic acquired resistance (SAR), leading to the expression of pathogen-related proteins such as (thaumatin-like proteins, oxalate oxidase, defensin, chitinase, and thionins). Although up-regulation of photosynthesis proteins such as (chlorophyll a/b binding protein, photosystem I and II, rubisco and divinyl chlorophyllide a, and 8 vinyl-reductase) were seen on both infested cultivars (susceptible and resistance), higher numbers of these classes of proteins were identified in the resistance cultivar, suggesting that they also play a critical role in resistance. In conclusion, the SWATH analysis used in this study was able to identify numerous proteins involved in the wheat resistance mechanism against RWA-SA2, most of which have not yet been reported to be involved in either biotic stress or RWA-SA2 resistance responses. Future studies are required to biochemically confirm the involvement of these enzymes and proteins the specific metabolic pathways where they are found, in the wheat resistance mechanism against Russian wheat aphid Biotype 2
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Date Issued: 2020

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An evaluation of performance management and development system: South African social security agency, Eastern Cape regional office

- Ndamase, Nkuthalo

Authors: Ndamase, Nkuthalo
Date: 2019
Subjects: Performance -- Management -- South Africa -- Eastern Cape , Employee motivation -- South Africa -- Eastern Cape Organizational commitment -- South Africa -- Eastern Cape Job satisfaction -- South Africa -- Eastern Cape
Language: English
Type: Thesis , Masters , MPA
Identifier: http://hdl.handle.net/10948/41763 , vital:36579
Description: The main aim and objective of the study was to conduct an evaluation of Performance Management and Development System with reference to South African Social Security Agency Eastern Cape Regional Office. In order to achieve the objective, the study applied stratified random sampling to draw a sample of 44 participants and 4 key informants representing the four PMDS Moderation Branch Committees. The study utilized questionnaires and semi-structured interviews as data collection instruments. Data analysis was conducted using descriptive statistics in terms of frequencies and percentages of occurrences. Data was also analyzed using thematic content analysis and a number of themes were identified. The main findings of the study, were that there was alignment of individual key performance areas to their unit’s Operational Plan and ultimately to goals and objectives of the Agency. There was lack of performance feedback sessions between supervisor and supervisee, which resulted in training of employees not being conducted. PMDS Moderation Committee members were not equipped in terms of how to assess employee performance. The main recommendation of the study is for the Human Capital Development unit as custodians of the implementation of PMDS, to conduct regular workshops on the application of the PMDS Policy for the employees as well as training of the PMDS Moderation Committee members. This would be done in an effort to ensure that the implementation of PMDS leads to the achievement of the goals and objectives of the Agency. The implementation of the PMDS Policy at SASSA Eastern Cape Regional Office has the potential to contribute to improved service delivery and by implication, the improvement of the quality of life of the millions of the recipients of social grant.
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Date Issued: 2019

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Violence and destruction as an important part of artistic action with reference to the two Great Wars

- Hallier, Michael Glen Thomas

Authors: Hallier, Michael Glen Thomas
Date: 1971-11
Subjects: Uncatalogued
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10962/190329 , vital:44984
Description: A well known fact about any work of art of any significance is its power to upset current conventions and disturb certain of our normal emotional patterns. The artist frequently achieves this by deliberately expressing emotions that are violent. There is nothing, however, new about the existence of violence in the arts, a large number of works in the history of art being painted with blood. One has only to think of the many battles, rapes, murders, martyrdoms and catastrophes that have been the subjects of many great paintings. Since the beginning of this century, and especially since the work of the Impressionists, in which violence is entirely excluded, violence has taken on a role of great importance and has been used to a greater or lesser extent by artists and group movements. It would appear initially that there are two main reasons in this century for the use of violence: one as a means of using it as a weapon against the academic and avant-garde in the arts, which in turn reflects attitudes found in society, and secondly as a direct reflection of the corrupt society in which we live. This is not to say that the twentieth century is an age in which more violence and sadism is found than in any other era of history, but never has it received so much publicity. I do not believe that man has change so much over the years, but it is my view that the apparent increase in this century is due to the vast changes in communications, it is due to the publicity it receives that violence has in recent times become a focal point, with murders, assassinations and war part of our daily lives. , Thesis (MFA) -- Faculty of Humanities, Fine Art, 1971
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Date Issued: 1971-11

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Development of high capacity lithium-manganese-rich cathode materials xLi2MnO3•(1-x)LiMn0.5Ni0.5O2 for lithium ion batteries

- Rapulenyane, Nomasonto

Authors: Rapulenyane, Nomasonto
Date: 2018
Subjects: Lithium ion batteries , Electrochemistry Lithium cells
Language: English
Type: Thesis , Doctoral , DPhil
Identifier: http://hdl.handle.net/10948/34766 , vital:33442
Description: In this study, a facile synthesis method was developed to produce layered-layered cathode materials with the formula xLi2MnO3•(1-x)LiMO2 (M= Ni and Mn) referred to as lithium-manganese-rich materials for lithium ion batteries. The prepared materials displayed high capacity ≥200 mAh/g at a current density of 20 mA/g in the voltage range of 2.0 V to 4.8 V. In particular the cathode material prepared at pH 10.0 delivered a high initial discharge capacity of 266 mAh/g at 20 mA/g current density and maintained a discharge capacity ≥220 mAh/g at 50 mA/g after 50 cycles. The synthesis method was used to further investigate the effect of lithium ratio in the layered-layered material. Li1+xMn0.6Ni0.2O2, x= 0.2, 0.25, 0.3 and 0.4 cathode materials were produced respectively. The BET surface area analysis results showed that Li1.3Mn0.6Ni0.2O2 material had comparatively higher surface area to the other cathode materials and also delivered good electrochemical results. XPS showed that the cation distribution is affected by the increase in lithium ratio, the Mn4+ percentages decreased significantly with an increase in lithium ratio. All materials peaks deconvoluted into two peaks namely Mn4+ and Mn3+, Li1.3Mn0.6Ni0.2O2 had the highest percentages of the stable Mn4+ 70.8%. Further investigation focused on the effect of the sintering temperature on the structure and the electrochemical performance of Li1+xMn0.6Ni0.2O2, x= 0.25, 0.3 and 0.4 cathode materials. X-ray diffraction showed the same patterns for all cathode materials sintered at 700˚C, 800˚C and 900˚C. Rietveld refined results however, showed that the increase in the sintering temperature, results in a decrease in the Li2MnO3 component percentage in the layered structures. Scanning electron microscopy images further proved that the particle size increases with increasing temperature. The charge–discharge tests of coin cells demonstrated that the materials sintered at 800˚C delivered higher discharge capacities above 200 mAh/g at 20 mA/g current density when compared to the materials made at the lower temperatures. Lastly the cathode material prepared at pH 10.0 was further evaluated in a cell using lithium titanate oxide Li4Ti5O12 as anode material. The cells delivered an initial discharge capacity of 213 mAh/g at 20 mA/g within a voltage range 3.3V-0.5V. The coin cells developed in this work delivered good cycling performance.
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Date Issued: 2018

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'Technic' practices of the computer game Lanner: identity development through the LAN-gameplay experience

- Khunyeli, Ramotsamai Itumeleng

Authors: Khunyeli, Ramotsamai Itumeleng
Date: 2011
Subjects: Computer games -- Social aspects , Computer games -- Psychological aspects , Computer games -- Sex differences , Information technology -- Social aspects , Social interaction -- Computer network resources , Local area networks (Computer networks) -- Social aspects , Race discrimination -- Education (Higher) -- Computer network resources
Language: English
Type: Thesis , Masters , MA
Identifier: vital:3534 , http://hdl.handle.net/10962/d1013405
Description: This thesis is a reception analysis using qualitative interviews to investigate the formation of cultural groups around computer-game LANs present in Rhodes University. It also looks at how issues of social inequalities evident on the university's campus impact on the participation of students in these LANs. The findings of this study are that the participants have established a community around the practice of computer LAN-gameplay based on values developed through the combination of the material and gameworlds. It serves as a home-on-campus for them; where they can fully explore their passion for games thus reaffirming their identity as gamers on a campus where being a gamer is viewed negatively. In this light, computer-game playing is not just a practice these participants perform, but a culture they live out every day. This is a culture predominantly lived out by men. One of the reasons for this is because most women have been raised to believe to have negative predispositions about digital gaming e.g. that it is childish, addictive and anti-social, but also that computer are meant to be used by men - women use them only when it is absolutely necessary, for example, that it is childish, for academic-related purposes. As a result, not many of them will use computers for any otherreason for fear of being socially criticised. In addition, the gaming culture being dominated by whites is due to the fact that admittance in to this community is still unaffordable for the majority of black students on the Rhodes University campus as a result of their social backgrounds.
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Date Issued: 2011

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Psychological capital as a moderator on the relationship between work-life balance and turnover intentions amongst selected bank employees in the Amathole district, Eastern Cape province

- Nyahwema, Cloudious

Authors: Nyahwema, Cloudious
Date: 2017
Subjects: Employee competitive behavior -- South Africa -- Eastern Cape Employee motivation -- South Africa -- Eastern Cape Human capital -- Psychological aspects
Language: English
Type: Thesis , Masters , MCom
Identifier: http://hdl.handle.net/10353/13556 , vital:39679
Description: Globalisation has facilitated high mobility among 21st century employees allowing brain circulation to occur. However, high employee mobility also means organisations are losing employees to competitors some of which are global business moguls with better resources leaving emerging businesses at a disadvantage. Lately, the South African banking sector has also been affected with high employee turnover requiring the need for investigation. For these reasons, the main objective of the study was to investigate whether psychological capital significantly moderates the relationship between work-life balance and turnover intentions among selected bank employees in Amathole district, Eastern Cape Province of South Africa. The study also examined if there is a positive and significant relationship between psychological capital and work-life balance among selected bank employees. In addition, the study sought to examine if there is a positive and significant relationship between psychological capital and turnover intention among selected bank employees. The study followed a quantitative research approach. Therefore, survey questionnaires were used as means of data collection and data was analysed using the Statistical Package for Social Sciences (SPSS). Research results indicated that psychological capital significantly moderates the relationship between work-life balance and turnover intentions among selected bank employees. A significantly positive relationship between psychological capital (PsyCap) and work-life balance among selected bank employees was found. The results also revealed that there is no significant relationship between psychological capital and turnover intentions among selected bank employees.
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Date Issued: 2017

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A cyclic approach to business continuity planning

- Botha, Jacques

Authors: Botha, Jacques
Date: 2002
Subjects: Data recovery (Computer science) -- Planning , Data protection , Emergency management
Language: English
Type: Thesis , Masters , MTech (Information Technology)
Identifier: vital:10788 , http://hdl.handle.net/10948/81 , Data recovery (Computer science) -- Planning , Data protection , Emergency management
Description: The Information Technology (IT) industry has grown and has become an integral part in the world of business today. The importance of information, and IT in particular, will in fact only increase with time (von Solms, 1999). For a large group of organizations computer systems form the basis of their day-to-day functioning (Halliday, Badendorst & von Solms, 1996). These systems evolve at an incredible pace and this brings about a greater need for securing them, as well as the organizational information processed, transmitted and stored. This technological evolution brings about new risks for an organization’s systems and information (Halliday et. al., 1996). If IT fails, it means that the business could fail as well, creating a need for more rigorous IT management (International Business Machines Corporation, 2000). For this reason, executive management must be made aware of the potential consequences that a disaster could have on the organisation (Hawkins,Yen & Chou, 2000). A disaster could be any event that would cause a disruption in the normal day-to-day functioning of an organization. Such an event could range from a natural disaster, like a fire, an earthquake or a flood, to something more trivial, like a virus or system malfunction (Hawkins et. al., 2000). During the 1980’s a discipline known as Disaster Recovery Planning (DRP) emerged to protect an organization’s data centre, which was central to the organisation’s IT based structure, from the effects of disasters. This solution, however, focussed only on the protection of the data centre. During the early 1990’s the focus shifted towards distributed computing and client/server technology. Data centre protection and recovery were no longer enough to ensure survival. Organizations needed to ensure the continuation of their mission critical processes to support their continued goal of operations (IBM Global Services, 1999). Organizations now had to ensure that their mission critical functions could continue while the data centre was recovering from a disaster. A different approach was required. It is for this reason that Business Continuity Planning (BCP) was accepted as a formal discipline (IBM Global Services, 1999). To ensure that business continues as usual, an organization must have a plan in place that will help them ensure both the continuation and recovery of critical business processes and the recovery of the data centre, should a disaster strike (Moore, 1995). Wilson (2000) defines a business continuity plan as “a set of procedures developed for the entire enterprise, outlining the actions to be taken by the IT organization, executive staff, and the various business units in order to quickly resume operations in the event of a service interruption or an outage”. With markets being highly competitive as they are, an organization needs a detailed listing of steps to follow to ensure minimal loss due to downtime. This is very important for maintaining its competitive advantage and public stature (Wilson, 2000). The fact that the company’s reputation is at stake requires executive management to take continuity planning very serious (IBM Global Services, 1999). Ensuring continuity of business processes and recovering the IT services of an organization is not the sole responsibility of the IT department. Therefore management should be aware that they could be held liable for any consequences resulting from a disaster (Kearvell-White, 1996). Having a business continuity plan in place is important to the entire organization, as everyone, from executive management to the employees, stands to benefit from it (IBM Global Services, 1999). Despite this, numerous organizations do not have a business continuity plan in place. Organizations neglecting to develop a plan put themselves at tremendous risk and stand to loose everything (Kearvell-White, 1996).
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Date Issued: 2002

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