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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
81

Litter quality effects on soil stabiltiy and erodibility in the Ntabelanga Area, Eastern Cape, South Africa

Parwada, Cosmas January 2017 (has links)
Soil organic matter (SOM) plays a primary role in aggregation and stabilization of soils, hence reducing their susceptibility to erosion. In South Africa (SA), most soils have low (< 4 percent) soil organic matte (SOM) contents, making them susceptible to soil erosion. Little is known about SOM quality effects in soil stabilization in the SA context, it is therefore difficult to advocate specific organic matter sources in order to stabilize a particular soil. This study evaluated effects of different litter quality sources (Vachellia karoo (sweet thorn) leaf litter and Zea mays (maize) stover) on soil aggregate stabilization at a soil micro-level (soil aggregate), guided by the following specific objectives; (i) to characterize soil properties that influence the erodibility of soils in the Ntabelanga area, Eastern Cape (EC) Province, SA (ii) to assess fractionation of organic carbon during decomposition of different litter sources (iii) to determine rate of soil macroaggregate re-formation under different litter amendments (iv) to determine the influence of different litter quality on splash soil erosion and (v) to delineate the Ntabelanga area into different soil erosion sensitivity zones. Soil samples collected from a proposed Ntabelanga dam site, EC Province, SA, were characterized for factors influencing erodibility. Soil physical and chemical properties were analyzed, soil erodibility (K-factor) estimated using SOC content and surface properties and soil loss rates by splashing determined under rainfall simulations at 360 mm h-1 rainfall intensity. Soil loss was then correlated with the chemical and physical soil properties. SOC showed significant (P< 0.05) inverse relationship with soil loss. Soils samples were bulked to seven composite samples according to major soil horizons (orthic A, melanic A, pedocutanic B, red apedal B, saprolite, G horizon and prismacutanic B) in the areas of soil associations, macroaggregate (> 0.250 mm) were removed by passing through a 0.250 mm sieve. The remaining soil microaggregates (< 0.250 mm) were then mixed with high quality Vachellia karoo leaf litter (C/N = 23.8) and low quality Zea mays stover (C/N = 37.4) and incubated at 23oC for 30 weeks. Jars were arranged as a 7 × 3 factorial laid in completely randomized design (CRD) with three replicates. Data was repeatedly measured at 1, 3, 8, 14, 23 and 30 weeks after incubation: to determine the stabilization of SOM by fractionating the soil particulate organic matter (POM), rate of soil macroaggregate re-formation and influence of litter quality on splash soil erosion along a decomposition continuum. Free light fractions (Free LF), coarse particulate organic matter (CoPOM) and fine particulate organic matter (FiPOM) within macroaggregates (> 250 μm) decreased exponentially from week 1 to 30 and were significantly (p < 0.05) influenced by litter quality × soil horizon × time interactions. A similar trend for FiPOM fractions in macroaggregates was observed in the 53-250 μm microaggregates (p < 0.05). The greatest influence on changes in POM fractions occurred within the first 3 weeks of incorporation. Both V. karroo leaf litter and Z. mays stover significantly stabilized the macroaggregates within the first 3 weeks after incubation. Cumulative macroaggregates yields, mean weight diameter (MWD), percentage water stable aggregates (%WSA) and whole soil stability index (WSSI) in litter amended soils increased up to week 8 of incubation and thereafter gradually declined in all soils. An increase in macroaggregation resulted in increased MWD, WSSI values and large and small aggregates distribution. Aggregation was significantly higher in soils with higher clay content than sand content, suggesting that soil texture was highly influential in litter decomposition. Rate of litter decomposition was influenced by soil type × time interactions which determined extent and macroaggregation dynamics along a decomposition continuum. The amount of splashed sediments was determined from each soil horizon at 360 mm h-1 simulated rainfall intensity applied as either single 8minute rainstorm (SR) or 4 × 2minute intermittent rainstorms (IR) separated by a 72 h drying period. Results showed a reduction in splashed sediments under IR and SR storms in litter-amended soils during the first 8 weeks of incubation with gradual increase thereafter. More sediments were splashed under IR than SR and litter quality had no influence on splashed sediments per soil horizon. Soil horizons profile with more clay than sand particles enhanced the litter effects on the soil resistance against detachment. The amount of SOC loss was influenced by primary particle size distribution and initial SOC content of the soil. Rainfall pattern and the initial SOC content were the main factors by which different soils influenced SOC loss. More rainstorm patterns should be investigated on these soils.
82

An exploration of functional and numerical flexibility in South African organisations: a qualitative study in two textile factories in Cape Town

Sela, Ronit January 2002 (has links)
During this research, an attempt was made to gain an understanding of management and their employees' perceptions regarding functional and numerical flexibility practices within South African organisations. To achieve this, twenty-six people, comprising of a variability of positions within the organisation, were interviewed in the region of the Western Cape. It was found that, although extensive research on the two forms of flexibility have been globally conducted, South African literature, particularly on the part of numerical flexibility, is limited. It is thus believed that this study will present a valuable basis to pursue in further research. Literature that was consulted was found to be supportive of the theoretical notion that South African organisations, in order to be globally competitive, have had to restructure and redefine themselves by ensuring that they make the most efficient and effective use of their human resources. The study found that whilst functional flexibility practices benefit employees in that they experienced increased job satisfaction and job mobility, it was the area of numerical flexibility which raised many dissatisfactions, including those of immense job insecurity and remuneration, both financial and otherwise. The study findings suggest a need for a more comprehensive and employee integrated approach by combining organisational with individual oriented initiatives, and ensuring the trade union's involvement in all facets of functional and numerical flexibility initiatives. The thesis ends with recommendations of various strategies for addressing the concerns of management, employees and the trade union in order to ensure full and proper utilisation of human resources so that the end product, namely job satisfaction, leads to organisational success.
83

Strategies for large class teaching

Van den Heever, Susanna 11 1900 (has links)
In this qualitative study, the phenomenon of large class teaching in South African secondary schools is investigated. It was concluded that since large classes will be a feature of the South African teaching context for many years to come due to financial constraints, educators and educational planners should explore and implement coping strategies instead of becoming demoralised by the situation. The study provides several instructional guidelines for implementation in large classes in the South African context. The focus of these guidelines is on large class management and effective teaching in large classes. The possibilities of strategies such as whole group instruction, cooperative learning, peer teaching, groupwork and the proper organisation of classroom space are investigated. / Educational Studies / M. Ed. (Didactics)
84

Aspects of general conditions of contract which give rise to dispute

Howell, David Evan January 1991 (has links)
Thesis ( Masters Diploma(Civil Engineering))--Cape Technikon, Cape Town, 1991 / The incidence of disputes has long frustrated effective management and completion of Construction Contracts. Very little material is available on the causes of disputes and how the respective General Conditions of Contract used in this country handle circumstances relating to these areas of dispute. Causes of dispute can be divided into two categories, namely Primary Causes and Secondary Causes. The Primary Causes are Time, Cost and Quality and the Secondary Causes are Risk. Variations and Alterations, Delays, Claims, Adverse Physical Conditions, Extensions of Time and Payment. All the secondary causes of dispute are risk related and a consideration of risk is therefore of utmost importance with regard to avoidance of disputes. To avoid disputes. risk has to be fairly allocated amongst the parties involved in the Contract. Before this can be done, however, risk first has to be identified and an attempt has to be made to reduce it. For a long time General Conditions of Contract have been used in this country which have been closely allied to British General Conditions. The General Conditions of Contract (1982) (Blue Book) is very closely allied to the I.CR General Conditions of Contract (4th edition). The latter contract was revised in 1979 and was generally considered to be more favourable toward the Contractor. It has become known as the LCE. General COnditions of Contract (5th edition). Both the General Conditions of Contract (1982) and the ESKOM General Conditions of Contract have recently been reVised, and on comparison of the clauses relating specifically to the major causes of disputes mentioned preViously, were found to be more biased in favour of the Employer and more closely allied to the C.S.R.A. General Conditions of Contract 1986, also widely used in South Africa The major reason for having drawn this conclusion is that in the case of GC C '90 and ESKOM '90, all claims have to be made in accordance with a general claims clause which involves a procedure which subjects the Contractor to unfair requirements and allocates risk unfairly on him. The General Conditions of Contract 1990 do, however, represent improvements in certain respects, namely with respect to clauses relating to Care of Works, Excepted Risks, Valuation of Variations, Monthly Payments, Time of Payments and Correction or Withholding of Certificates. No set of General Conditions can provide a completely equitable situation and each has its pros and cons. This thesis should provide an easy reference as to which are the major causes of disputes and as to how the respective General Conditions of Contract in this country handle the circumstances relating to these areas of dispute. It will also put forward recommendations on how disputes can be avoided and how certain clauses of the relevant documents can be improved.
85

Guidelines for SMME development in Hermanus

Basson, Dalene January 2003 (has links)
Thesis (MTech (Business Administration)--Cape Technikon, Cape Town, 2003 / Unemployment has economic and social effects. The main social threat is the stability of the family as an economic and social unit as family relationships suffer should basic needs not be met. The most practical way to combat this problem is through entrepreneurship, where small medium and micro enterprises can address issues such as job creation and economic growth. These enterprises are of particular importance to government and donors resulting in numerous studies being done in especially urban environments. Rural areas have, however, been neglected, owing to the lack of knowledge, funds and initiatives on the part of local authorities. Rural development differs from urban development owing to smaller markets, seasonal fluctuations and slower growth rates, especially in coastal towns. This study was therefore undertaken to provide guidelines to local authorities and community leaders, specifically in Hermanus, to enable them to support local small businesses. As a first step, existing government policy and strategies were investigated (Chapter 2), after which available assistance, on government and non-government level, was discussed (Chapter 3). The Department of Trade and Industry is the main role player in terms of small business development There are also institutions providing financial assistance (for example Khula and the Industrial Development Corporation), institutions providing services (such as NEPA, SABS and CSIR), and finally, institutions providing indirect support (such as SACOB and DBSA). Hermanus as the basis of the study has certain poIicies in place, namely the Integrated Development Plan, Spatial Development Framework and two tourism-related studies (Chapter 4). Individual interviews were held with certain role players in the area (Chapter 5) which resulted in the following: • Role players are not aware of government initiatives in terms of small, medium and micro enterprises in the region. • Role players are unsure if hives/craft: markets could contribute to job creation. • Role players are concerned about job creation but not through small, medium and micro enterprises as a vehicle. Chapter 6 concludes with two success stories, namely Stutterheim and Melkhoutfontein, and provides broad guidelines in terms of small business development in Hermanus.
86

Comparison of decision styles of business managers in two international companies within a rational decision-making context

Bei, Zhou January 2006 (has links)
Thesis (MTech (Business Administration))--Cape Peninsula University of Technology, Cape Town, 2006 / The purpose of this study is to compare the decision styles of business managers in China with those in South Africa, taking cognisance of certain variables such as nationality, gender, and occupational group within a particular homogeneous industry. The first consideration was to conduct on international comparison and compare the similarities and differences of decision styles within a rational decision-making context. The second consideration was to investigate whether decision styles vary between the variables identified above. The survey was conducted in two companies, namely South African Breweries Limited and Tsingtao Co., Ltd who conduct business in South Africa and China, respectively. The research population comprised of 180 business managers in both companies. The research study revealed that there is no significant difference of decision styles between the business managers in both companies. The conclusion drawn from this analysis is that the business managers in South African Breweries Limited and Tsingtao Co., Ltd have considerable flexibility and find little difficulty in changing from one style to another as the situation warrants. This conclusion is supported by the findings submitted by Rowe and Boulgarides in their seminal work published in 1992.
87

Menslike hulpbronbestuur binne die veranderde Suid-Afrikaanse plaaslike owerheidsbestel

Brand, Hugo January 2001 (has links)
Thesis (DTech( Human Resource Management))--Cape Technikon, Cape Town, 2001 / Through this research it is shown that the involvement of human resource management in the transforming local government, which currently functions at a low level in the local authority sector, will become an ever increasing necessity in South Africa. Local authorities could either accept circumstances as they are, or accept the responsibility to change them. In this research the researcher accepted the responsibility to make a contribution towards a possible change by focusing on the contribution that the human resource manager, in more specifically local authorities in South Africa could make in this regard. The change that is envisaged and is being brought about in the South African local government sector with specific reference to the service delivery of the provision, management and control of local government, has led to the establishment of: • human resource management and comprehensive management functions; • participative involvement; • a requirement of new, additional techniques of human resource management for local authorities; and • an essential requirement for increasing employee, councillor and public involvement within local government. The outcome of the abovementioned is an incisive need of improving human resource management and sound labour relations. In order to obtain the aforementioned objectives, qualitative research was used. 5 With this study the research has endeavoured to determine: • why the involvement of human resource management in the transforming local authority sector is important; • what the nature of human resource involvement within local authorities is; • what the role, functions, involvement and methods of human resource managers in the transforming local government entails; and • how the human resource involvement within local authorities can be arranged and what the characteristics of the human resource manager should be.
88

Comparison of decision styles of business managers in two international companies within a rational decision-making context

Bei, Zhou January 2006 (has links)
Thesis (MTech (Business Administration))--Cape Peninsula University of Technology, 2006. / The purpose of this study is to compare the decision styles of business managers in China with those in South Africa, taking cognisance of certain variables such as nationality, gender, and occupational group within a particular homogeneous industry. The first consideration was to conduct on international comparison and compare the similarities and differences of decision styles within a rational decision-making context. The second consideration was to investigate whether decision styles vary between the variables identified above. The survey was conducted in two companies, namely South African Breweries Limited and Tsingtao Co., Ltd who conduct business in South Africa and China, respectively. The research population comprised of 180 business managers in both companies. The research study revealed that there is no significant difference of decision styles between the business managers in both companies. The conclusion drawn from this analysis is that the business managers in South African Breweries Limited and Tsingtao Co., Ltd have considerable flexibility and find little difficulty in changing from one style to another as the situation warrants. This conclusion is supported by the findings submitted by Rowe and Boulgarides in their seminal work published in 1992.
89

An investigation into classroom management in an outcomes-based education context : implications for parents and governors

Govender, Loganayagie January 2004 (has links)
Dissertation submitted in partial compliance with the requirements for the Masters Degree in Technology: (Management) at the Durban Institute of Technology, 2004. / Since 1994 South Africa has been undergoing political change and this has impacted tremendously on education. There have been major shifts in education policy, structures and curriculum. Since the introduction of the new curriculum which is Outcomes-Based Education, educators, learners, parents, school governors and principals have been faced with numerous challenges and have also been confronted with a variety of problems / M
90

Gedragsmodifisering as bestuurstaak van die skoolhoof

Du Toit, Jacobus Petrus 28 July 2014 (has links)
M.Ed. (Education Management) / A notable feature of the school principal as managerial leader's task is its comprehensive and complex nature. Behavior modification is a managerial skill, that should make the principal more effective in interpersonal relations and communication in the school as organisation. In this short dissertation the focus is on behavior modification as managerial task of the principal. Behavior modification has as its goals the explanation, prediction and control of. behavior. Behavior modification as described in this short dissertation relies extensively on the psychology of learning, including classical conditioning, operant conditioning and modelling. On managerial level classical conditioning has little or no application, consequently it will not receive much attention in this study. The use of operant conditioning is, however, discussed in detail emphasising the use of the positive aspects of operant conditioning. The principles of operant conditioning describe the relationship between behavior, and various environmental events (antecedents and consequences) that influence behavior. Although both antecedents and consequences can alter behavior, most applications of operant conditioning principles emphasize the consequences that follow behavior. In this short dissertation operant conditioning is divided into two sets of techniques to be used on managerial level: Techniques to alter unacceptable behavior and techniques or procedures for teaching acceptable behavior. Techniques to alter unacceptable behavior - punishment, extinction, saturation and counter conditioning - can all be used by the principal as managerial leader.

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