Computer modelling of pyrotechnic combustion
- Authors: Taylor, Steven John
- Date: 1996
- Subjects: Combustion -- Computer simulation
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4426 , http://hdl.handle.net/10962/d1006913
- Description: One of the most important industrial uses of pyrotechnic compositions is as delay fuses in electric detonators. Many factors influence the rate of burning of such fuses. These include (a) the primary choice of chemical components, followed by (b) the physical properties of these components, particularly the particle-size and distribution of the fuel, (c) the composition of the system chosen and (d) the presence of additives and/or impurities. A full experimental study of the influences of even a few of these factors, while attempting to hold other potential variables constant, would be extremely time consuming and hence attention has been focused on the possibilities of modelling pyrotechnic combustion. Various approaches to the modelling of pyrotechnic combustion are discussed. These include:- (i) one-dimensional finite-difference models; (ii) two-dimensional finite-element models; (iii) particle-packing considerations; (iv) Monte Carlo models. Predicted behaviour is compared with extensive experimental information for the widely-used antimony/potassium permanganate pyrotechnic system, and the tungsten /potassium dichromate pyrotechnic system. The one-dimensional finite-difference model was investigated to give a simple means of investigating the effects of some parameters on the combustion of a pyrotechnic. The two-dimensional finite-difference model used similar inputs, but at the expense of considerably more computer power, gave more extensive information such as the shape of the burning front and the temperature gradients throughout the column and within the casing material. Both these models gave improved results when allowance was made for autocatalytic kinetics in place of the usual assumption of an "order-of-reaction", n ≤ 1. The particle-packing model investigated the qualitative relationship between the maximum burning rate of a pyrotechnic system and the maximum number of contact points (per 1.00 g composition) calculated for that system. Qualitative agreement was found for those systems which are presumed to burn mainly via solid-solid reactions. The Monte Carlo model investigated the effect of the random packing of fuel and oxidant particles on the variability of the burning rate of a pyrotechnic composition.
- Full Text:
- Date Issued: 1996
- Authors: Taylor, Steven John
- Date: 1996
- Subjects: Combustion -- Computer simulation
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4426 , http://hdl.handle.net/10962/d1006913
- Description: One of the most important industrial uses of pyrotechnic compositions is as delay fuses in electric detonators. Many factors influence the rate of burning of such fuses. These include (a) the primary choice of chemical components, followed by (b) the physical properties of these components, particularly the particle-size and distribution of the fuel, (c) the composition of the system chosen and (d) the presence of additives and/or impurities. A full experimental study of the influences of even a few of these factors, while attempting to hold other potential variables constant, would be extremely time consuming and hence attention has been focused on the possibilities of modelling pyrotechnic combustion. Various approaches to the modelling of pyrotechnic combustion are discussed. These include:- (i) one-dimensional finite-difference models; (ii) two-dimensional finite-element models; (iii) particle-packing considerations; (iv) Monte Carlo models. Predicted behaviour is compared with extensive experimental information for the widely-used antimony/potassium permanganate pyrotechnic system, and the tungsten /potassium dichromate pyrotechnic system. The one-dimensional finite-difference model was investigated to give a simple means of investigating the effects of some parameters on the combustion of a pyrotechnic. The two-dimensional finite-difference model used similar inputs, but at the expense of considerably more computer power, gave more extensive information such as the shape of the burning front and the temperature gradients throughout the column and within the casing material. Both these models gave improved results when allowance was made for autocatalytic kinetics in place of the usual assumption of an "order-of-reaction", n ≤ 1. The particle-packing model investigated the qualitative relationship between the maximum burning rate of a pyrotechnic system and the maximum number of contact points (per 1.00 g composition) calculated for that system. Qualitative agreement was found for those systems which are presumed to burn mainly via solid-solid reactions. The Monte Carlo model investigated the effect of the random packing of fuel and oxidant particles on the variability of the burning rate of a pyrotechnic composition.
- Full Text:
- Date Issued: 1996
Computer modelling of the thermal decomposition of solids
- Authors: De la Croix, Annemarie
- Date: 1996
- Subjects: Solids -- Thermal properties -- Computer simulation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4302 , http://hdl.handle.net/10962/d1004960 , Solids -- Thermal properties -- Computer simulation
- Description: Decompositions of solids are typically of the form: A(s) ----> B(s) + gases. Symmetry-controlled routes (based on known and hypothetical crystal structures) for transforming the solid reactant into the solid product were devised as possible decomposition pathways. Lattice energies of the reactants, of the postulated transient intermediate structures and of the final solid products were then estimated by crystal modelling procedures. Profiles of lattice energy changes during the proposed decomposition routes were constructed and any energy barriers were compared with experimental activation energies reported for the thermal decompositions. The crystal modelling was performed with the computer program WMIN. Calculation of the lattice energies involved the development of a model potential for the perfect lattice and the evaluation of the interatomic parameters. The potential was based on the Born model of ionic solids using the Buckingham potential (Ø(r)= Ae⁻r/p - C/r⁶) to describe the short-range energy contribution. Empirical fitting was used to establish reliable interatomic energy parameters. The reliability of the interatomic potentials was assessed by calculating crystal structures and lattice energies (which were not included in the fitting). The particular reactions selected for modelling were the decompositions of the alkaline-earth metal (Ca, Sr, Ba) peroxides and carbonates: M0₂(s) ---> MO(s) + ¹/₂0₂(g) MC0₃(s) ---> MO(s) + CO₂(g)The lattice energies calculated for the known structures were in good agreement with reported values, (except for Ba0₂ and BaC0₃) which provided support for the adequacy of the potential model used. Activation energies calculated for the decomposition of the carbonates were in the correct order but hlgher than experimental values, i. e., 422, 422, 465 and 499 kJ mol̄̄⁻¹ compared to the experimental values of 205, 87(?), 222 and 283 kJ mol̄̄⁻¹ for CaC0₃ (calcite), CaC0₃(aragonite), SrC0₃ and BaC0₃. The values calculated for the peroxides (91 and 100 kJ mol⁻¹ compared to the experimental values of 119 and 185 kJ mol⁻¹ for Sr0₂ and Ba0₂ respectively) were less satisfactory but could be a reflection of the poor structural data used for the peroxides. The significance of this approach to the modelling of solid decompositions is discussed.
- Full Text:
- Date Issued: 1996
- Authors: De la Croix, Annemarie
- Date: 1996
- Subjects: Solids -- Thermal properties -- Computer simulation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4302 , http://hdl.handle.net/10962/d1004960 , Solids -- Thermal properties -- Computer simulation
- Description: Decompositions of solids are typically of the form: A(s) ----> B(s) + gases. Symmetry-controlled routes (based on known and hypothetical crystal structures) for transforming the solid reactant into the solid product were devised as possible decomposition pathways. Lattice energies of the reactants, of the postulated transient intermediate structures and of the final solid products were then estimated by crystal modelling procedures. Profiles of lattice energy changes during the proposed decomposition routes were constructed and any energy barriers were compared with experimental activation energies reported for the thermal decompositions. The crystal modelling was performed with the computer program WMIN. Calculation of the lattice energies involved the development of a model potential for the perfect lattice and the evaluation of the interatomic parameters. The potential was based on the Born model of ionic solids using the Buckingham potential (Ø(r)= Ae⁻r/p - C/r⁶) to describe the short-range energy contribution. Empirical fitting was used to establish reliable interatomic energy parameters. The reliability of the interatomic potentials was assessed by calculating crystal structures and lattice energies (which were not included in the fitting). The particular reactions selected for modelling were the decompositions of the alkaline-earth metal (Ca, Sr, Ba) peroxides and carbonates: M0₂(s) ---> MO(s) + ¹/₂0₂(g) MC0₃(s) ---> MO(s) + CO₂(g)The lattice energies calculated for the known structures were in good agreement with reported values, (except for Ba0₂ and BaC0₃) which provided support for the adequacy of the potential model used. Activation energies calculated for the decomposition of the carbonates were in the correct order but hlgher than experimental values, i. e., 422, 422, 465 and 499 kJ mol̄̄⁻¹ compared to the experimental values of 205, 87(?), 222 and 283 kJ mol̄̄⁻¹ for CaC0₃ (calcite), CaC0₃(aragonite), SrC0₃ and BaC0₃. The values calculated for the peroxides (91 and 100 kJ mol⁻¹ compared to the experimental values of 119 and 185 kJ mol⁻¹ for Sr0₂ and Ba0₂ respectively) were less satisfactory but could be a reflection of the poor structural data used for the peroxides. The significance of this approach to the modelling of solid decompositions is discussed.
- Full Text:
- Date Issued: 1996
Conrad's impressionism : the treatment of space and atmosphere in selected works
- Authors: De Lange, Adriaan Michiel
- Date: 1996
- Subjects: Conrad, Joseph, 1857-1924 -- Criticism and interpretation Conrad, Joseph, 1857-1924 -- Heart of darkness Conrad, Joseph, 1857-1924 -- Nigger of the Narcissus Conrad, Joseph, 1857-1924 -- Nostromo Conrad, Joseph, 1857-1924 -- Lord Jim
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2229 , http://hdl.handle.net/10962/d1002272
- Description: This thesis focuses on Conrad's representation of space and atmosphere in the "impressionistic" works published between 1897 and 1904, notably The Nigger of the "Narcissus" (1897), "Heart of Darkness" (1899), Lord Jim (1900), and Nostromo (1904). The many conflicting statements regarding the nature of Conrad's impressionism lead one to ask two fundamental questions: What constitutes this strange and elusive phenomenon, and how does it bear upon interpretation? This thesis works towards defining the elusive quality of Conrad's writing by investigating and assessing the contribution of impressionist techniques in the creation of a pervasive space and atmosphere; secondly, it considers how the various constituent elements interact with, and complement one another to form a dominant mode of fictional space in each work; and, thirdly, it indicates the possible impact that these particular Conradian configurations of space and atmosphere might have upon the interpretation of his impressionist works. The thesis argues that the existential condition of isolatio~experienced by Conrad's heroes and narrators is a consequence of epistemological frustration and fragmentation, which, in turn, is a function of impressionist ontology. There is a definite and complementary relationship between each of these notions in Conrad's fiction. The mysterious atmosphere in his works results from the interplay between various configurations of theme, narration and description, and these novelistic elements correspond roughly with the notions of existential isolation (the dominant theme), epistemology (narrating, telling and (re)telling as a method of knowing and understanding the space in which the characters find themselves) and, lastly, the ontological dimensions of the various modes of fictional space (as realized in description). The evocation and invocation of cosmic space in The Nigger of the "Narcissus," the mapping of a dorriinant symbolic space in "Heart of Darkness," the (re)constructions of Jim's psychological space in Lord Jim, and, finally, the "transcription" and "inscription" of a mythical space in Nostromo, indicate a definite development from epistemological to ontological issues. Phrased in more theoretical terms, this development is a movement from asking predominantly epistemological questions like "How can I interpret this world of which I am a part?" "What is there to be known?" "Who knows it ... and with what degree of certainty?", to asking predominantly ontological questions, such as "Which world is this?" "What kinds of worlds are there ... and how are they constituted?". Such questions, categorized by McHale as the dominant characteristics of Modernist and Postmodernist fiction respectively, are already present in Conrad's texts, thus undermining any clear-cut division between these broad categories. Indeed, this thesis suggests that these categories are at best tenuous, and that they should perhaps be used heuristically, rather than definitively
- Full Text:
- Date Issued: 1996
- Authors: De Lange, Adriaan Michiel
- Date: 1996
- Subjects: Conrad, Joseph, 1857-1924 -- Criticism and interpretation Conrad, Joseph, 1857-1924 -- Heart of darkness Conrad, Joseph, 1857-1924 -- Nigger of the Narcissus Conrad, Joseph, 1857-1924 -- Nostromo Conrad, Joseph, 1857-1924 -- Lord Jim
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2229 , http://hdl.handle.net/10962/d1002272
- Description: This thesis focuses on Conrad's representation of space and atmosphere in the "impressionistic" works published between 1897 and 1904, notably The Nigger of the "Narcissus" (1897), "Heart of Darkness" (1899), Lord Jim (1900), and Nostromo (1904). The many conflicting statements regarding the nature of Conrad's impressionism lead one to ask two fundamental questions: What constitutes this strange and elusive phenomenon, and how does it bear upon interpretation? This thesis works towards defining the elusive quality of Conrad's writing by investigating and assessing the contribution of impressionist techniques in the creation of a pervasive space and atmosphere; secondly, it considers how the various constituent elements interact with, and complement one another to form a dominant mode of fictional space in each work; and, thirdly, it indicates the possible impact that these particular Conradian configurations of space and atmosphere might have upon the interpretation of his impressionist works. The thesis argues that the existential condition of isolatio~experienced by Conrad's heroes and narrators is a consequence of epistemological frustration and fragmentation, which, in turn, is a function of impressionist ontology. There is a definite and complementary relationship between each of these notions in Conrad's fiction. The mysterious atmosphere in his works results from the interplay between various configurations of theme, narration and description, and these novelistic elements correspond roughly with the notions of existential isolation (the dominant theme), epistemology (narrating, telling and (re)telling as a method of knowing and understanding the space in which the characters find themselves) and, lastly, the ontological dimensions of the various modes of fictional space (as realized in description). The evocation and invocation of cosmic space in The Nigger of the "Narcissus," the mapping of a dorriinant symbolic space in "Heart of Darkness," the (re)constructions of Jim's psychological space in Lord Jim, and, finally, the "transcription" and "inscription" of a mythical space in Nostromo, indicate a definite development from epistemological to ontological issues. Phrased in more theoretical terms, this development is a movement from asking predominantly epistemological questions like "How can I interpret this world of which I am a part?" "What is there to be known?" "Who knows it ... and with what degree of certainty?", to asking predominantly ontological questions, such as "Which world is this?" "What kinds of worlds are there ... and how are they constituted?". Such questions, categorized by McHale as the dominant characteristics of Modernist and Postmodernist fiction respectively, are already present in Conrad's texts, thus undermining any clear-cut division between these broad categories. Indeed, this thesis suggests that these categories are at best tenuous, and that they should perhaps be used heuristically, rather than definitively
- Full Text:
- Date Issued: 1996
Controls on channel form and channel change in the Bell River, Eastern Cape, South Africa
- Rowntree, Kate M, Dollar, Evan S J
- Authors: Rowntree, Kate M , Dollar, Evan S J
- Date: 1996
- Language: English
- Type: Article
- Identifier: vital:6723 , http://hdl.handle.net/10962/d1006801
- Description: Channel instability has occurred in the Bell River in the form of meander cutoffs, incipient meander cutoffs, and general channel instability. This paper examines the incidence of channel instability in relation to the spatial variability of factors controlling channel form. The locations of channel change were mapped from aerial photographs for a 40 year period. Channel form characteristics were measured over a 17 km stretch of channel. Data collected from this stretch included pattern, width, depth, form ratio, channel gradient, particle-size distribution of bed and bank materials and riparian vegetation. Results indicate that the two primary spatial controls on channel form and pattern are riparian vegetation and bed-material size. Evidence indicates that narrow stable stretches are associated with finer bed-material and relatively high levels of riparian vegetation. Riparian vegetation increases bank stability and reduces channel cross-section, thereby inducing stability at flows less than bankfull. However, at flows greater than bankfull, reduced channel capacity results in more frequent flooding which may ultimately lead to channel avulsion. Wider, unstable channels are associated with larger calibre bed material and relatively less riparian vegetation. Predicted threshold slopes for braiding have indicated that most reaches in the Bell river are close to or above the threshold slope for braiding. Since riparian vegetation serves to increase bank stability, steeper threshold slopes are required for braiding in channels with high vegetation density Recent incidences of channel instability have been identified as occurring in the transitional zone between the upper, coarser reach and lower, finer channel reach.
- Full Text: false
- Date Issued: 1996
- Authors: Rowntree, Kate M , Dollar, Evan S J
- Date: 1996
- Language: English
- Type: Article
- Identifier: vital:6723 , http://hdl.handle.net/10962/d1006801
- Description: Channel instability has occurred in the Bell River in the form of meander cutoffs, incipient meander cutoffs, and general channel instability. This paper examines the incidence of channel instability in relation to the spatial variability of factors controlling channel form. The locations of channel change were mapped from aerial photographs for a 40 year period. Channel form characteristics were measured over a 17 km stretch of channel. Data collected from this stretch included pattern, width, depth, form ratio, channel gradient, particle-size distribution of bed and bank materials and riparian vegetation. Results indicate that the two primary spatial controls on channel form and pattern are riparian vegetation and bed-material size. Evidence indicates that narrow stable stretches are associated with finer bed-material and relatively high levels of riparian vegetation. Riparian vegetation increases bank stability and reduces channel cross-section, thereby inducing stability at flows less than bankfull. However, at flows greater than bankfull, reduced channel capacity results in more frequent flooding which may ultimately lead to channel avulsion. Wider, unstable channels are associated with larger calibre bed material and relatively less riparian vegetation. Predicted threshold slopes for braiding have indicated that most reaches in the Bell river are close to or above the threshold slope for braiding. Since riparian vegetation serves to increase bank stability, steeper threshold slopes are required for braiding in channels with high vegetation density Recent incidences of channel instability have been identified as occurring in the transitional zone between the upper, coarser reach and lower, finer channel reach.
- Full Text: false
- Date Issued: 1996
Current ISER research projects
- Rhodes University, Institute of Social and Economic Research
- Authors: Rhodes University, Institute of Social and Economic Research
- Date: 1996
- Subjects: Rhodes University -- Employees Rhodes University -- History Rhodes University. Institute of Social and Economic Research Economic development -- Research -- South Africa Social change -- Research -- South Africa
- Language: English
- Type: Manuscript , Text
- Identifier: http://hdl.handle.net/10962/2465 , vital:20294
- Description: Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1996
- Authors: Rhodes University, Institute of Social and Economic Research
- Date: 1996
- Subjects: Rhodes University -- Employees Rhodes University -- History Rhodes University. Institute of Social and Economic Research Economic development -- Research -- South Africa Social change -- Research -- South Africa
- Language: English
- Type: Manuscript , Text
- Identifier: http://hdl.handle.net/10962/2465 , vital:20294
- Description: Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1996
Cyclic voltammetry and spectroelectrochemistry of osmium phthalocyanines in aqueous and non-aqueous solvents
- Sekota, Mantoa, Nyokong, Tebello
- Authors: Sekota, Mantoa , Nyokong, Tebello
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/293358 , vital:57078 , xlink:href="https://doi.org/10.1016/0277-5387(95)00581-1"
- Description: Cyclic voltammetry of osmium phthalocyanine complexes, [(CN)2OsIIPc]2− and (py)2OSIIPc (PC = phthalocyanine dianion), show two oxidation couples and two reduction couples in acetonitrile and dimethy1formamide. Oxidation and reduction in these complexes occur at the ring to form cation and anion radical species, respectively. The [(CN)2OsIIPC]2− complexes show a remarkable ease of ring oxidation with oxidation potentials that are much lower than is typical for metallophthalocyanines. Half-wave potentials of 0.25 and 0.67 V (versus saturated calomel electrode, SCE) were obtained for the first and second ring oxidations, respectively. The [(CN)2OSIIPc]2− complex is soluble in water at pHs greater than 4. This complex shows one oxidation couple in pH 9 buffer at −0.11 V versus SCE.
- Full Text:
- Date Issued: 1996
- Authors: Sekota, Mantoa , Nyokong, Tebello
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/293358 , vital:57078 , xlink:href="https://doi.org/10.1016/0277-5387(95)00581-1"
- Description: Cyclic voltammetry of osmium phthalocyanine complexes, [(CN)2OsIIPc]2− and (py)2OSIIPc (PC = phthalocyanine dianion), show two oxidation couples and two reduction couples in acetonitrile and dimethy1formamide. Oxidation and reduction in these complexes occur at the ring to form cation and anion radical species, respectively. The [(CN)2OsIIPC]2− complexes show a remarkable ease of ring oxidation with oxidation potentials that are much lower than is typical for metallophthalocyanines. Half-wave potentials of 0.25 and 0.67 V (versus saturated calomel electrode, SCE) were obtained for the first and second ring oxidations, respectively. The [(CN)2OSIIPc]2− complex is soluble in water at pHs greater than 4. This complex shows one oxidation couple in pH 9 buffer at −0.11 V versus SCE.
- Full Text:
- Date Issued: 1996
Death and gnosis: archetypal dream imagery in terminal illness
- Authors: Welman, Mark
- Date: 1996
- Subjects: Jung, C G (Carl Gustav), 1875-1961 Thanatology Death -- Psychological aspects Dreams Dreams Case studies Death in dreams
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3084 , http://hdl.handle.net/10962/d1002593
- Description: The central aim of this study was to explore the meaning of death as both a literal and an imaginative reality, and to elucidate the fundamental tensions between these meanings of death in modern existence. Recognition was given to the need for a poetic rather than a scientific approach to thanatology, and an epistemological foundation for a poetics of death was sought in the tradition of gnosis. Theoretically, the study was grounded in the analytical psychology of C.G. Jung. It was argued that despite Jung's erratic allegiance to a Cartesian ontology and epistemology, his approach to death was nevertheless fundamentally poetic. The poetic parameters of death and dying were explored in the context of Jung's understanding of the dialectical tension between the ego and the self, and it was concluded that while death represents an opening to the imaginative possibilities of existence, these potentialities can come to the fore only when there is a corresponding willingness to die. In these terms, it was concluded that the tension between life and death forms a pivotal dynamic of human existence. These considerations led to the Question of whether the poetic parameters of death and dying are applicable to the encounter with death as a concrete actuality. It was hypothesised that the approach of death would be met at two levels of reality, that of the ego and that of the self. The expectation was that while death would be seen as a literal ending from the perspective of the former, it may represent the fulfilment of Being from the viewpoint of the self. It was also assumed that the tension between these images of death would be mediated by way of archetypal symbols, which represent the bearers of gnosis in modern culture. To address these issues at an empirical level, a hermeneutically grounded thematic analysis of 108 dreams reported by dying persons was undertaken. Twenty initial themes emerged from the data. Each of these themes was in turn elucidated by way of Jung's method of amplification. This exercise yielded five concise themes, these being (a) death, (b) transformation, (c) the self (d) the Feminine, and (e) the Masculine. It was concluded that dreams manifesting during the dying process reveal a fundamental tension between literal and metaphoric possibilities of death. Dream symbols were also found to mediate between this tension, and to orchestrate the individuation process. It was concluded that in the context of dying, dreams may reflect and facilitate the emergence of a meaningful gnosis of death. The clinical implications of these findings were onsidered, and indications for further research were provided.
- Full Text:
- Date Issued: 1996
- Authors: Welman, Mark
- Date: 1996
- Subjects: Jung, C G (Carl Gustav), 1875-1961 Thanatology Death -- Psychological aspects Dreams Dreams Case studies Death in dreams
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3084 , http://hdl.handle.net/10962/d1002593
- Description: The central aim of this study was to explore the meaning of death as both a literal and an imaginative reality, and to elucidate the fundamental tensions between these meanings of death in modern existence. Recognition was given to the need for a poetic rather than a scientific approach to thanatology, and an epistemological foundation for a poetics of death was sought in the tradition of gnosis. Theoretically, the study was grounded in the analytical psychology of C.G. Jung. It was argued that despite Jung's erratic allegiance to a Cartesian ontology and epistemology, his approach to death was nevertheless fundamentally poetic. The poetic parameters of death and dying were explored in the context of Jung's understanding of the dialectical tension between the ego and the self, and it was concluded that while death represents an opening to the imaginative possibilities of existence, these potentialities can come to the fore only when there is a corresponding willingness to die. In these terms, it was concluded that the tension between life and death forms a pivotal dynamic of human existence. These considerations led to the Question of whether the poetic parameters of death and dying are applicable to the encounter with death as a concrete actuality. It was hypothesised that the approach of death would be met at two levels of reality, that of the ego and that of the self. The expectation was that while death would be seen as a literal ending from the perspective of the former, it may represent the fulfilment of Being from the viewpoint of the self. It was also assumed that the tension between these images of death would be mediated by way of archetypal symbols, which represent the bearers of gnosis in modern culture. To address these issues at an empirical level, a hermeneutically grounded thematic analysis of 108 dreams reported by dying persons was undertaken. Twenty initial themes emerged from the data. Each of these themes was in turn elucidated by way of Jung's method of amplification. This exercise yielded five concise themes, these being (a) death, (b) transformation, (c) the self (d) the Feminine, and (e) the Masculine. It was concluded that dreams manifesting during the dying process reveal a fundamental tension between literal and metaphoric possibilities of death. Dream symbols were also found to mediate between this tension, and to orchestrate the individuation process. It was concluded that in the context of dying, dreams may reflect and facilitate the emergence of a meaningful gnosis of death. The clinical implications of these findings were onsidered, and indications for further research were provided.
- Full Text:
- Date Issued: 1996
Defining governance in Uganda in a changing world order, 1962-94
- Authors: Kintu-Nyago, Crispin
- Date: 1996
- Subjects: Uganda -- Politics and government , Uganda -- Economic conditions , World politics , International relations
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2788 , http://hdl.handle.net/10962/d1002998 , Uganda -- Politics and government , Uganda -- Economic conditions , World politics , International relations
- Description: This study argues that much of early post colonial Uganda's political developments, had its roots in the colonial patterns of governance. It was, however, the imperative of Uganda's early post colonial rulers to have formulated and maintained conditions for legitimate and orderly governance. Largely, this required a coherent political class with a mass based and mobilising political movement, that moreover had a political programme that catered for the interests of its support base. Indeed, their opting to negate these very prerequisite conditions, contributed greatly to Uganda's subsequent political disorder, and it's further marginalisation in the International Political Economy. This study suggests that since the impact of colonialism in Uganda, its governance policies have closely been linked to the broader dictates of the International Political Economy. A reality that the policy makers in post colonial Uganda should have realised, and in the process attempted to advantageously adapt to the Ugandan situation. Their was a qualitative improvement in Uganda's governance from 1986. This study illustrates that this was a result of the emerging into power of a political class, whose policies deliberately and strenuously attempted to fulfil the above mentioned criteria. Their is need to link Uganda's foreign and governance policies. Consequently a conscious and deliberate effort has to made by its policy makers, to ensure that the two are amicably adapted to each other, so as to derive the best possible benefits. For instance what Uganda needs in the existing New World Order are development, domestic and foreign investments and export markets for its produce. All of which can only be obtained if political order through a legitimate political system and government exists. With a leadership, that moreover, deliberately attracts foreign investments and creates the enabling conditions for competitive economic production. The onus is upon Ugandans to ensure that they institutionalise conditions for their appropriate governance and foreign policies. For this thesis argues that the International Political Economy is dynamic, and Uganda was never predestined to be at its margins.
- Full Text:
- Date Issued: 1996
- Authors: Kintu-Nyago, Crispin
- Date: 1996
- Subjects: Uganda -- Politics and government , Uganda -- Economic conditions , World politics , International relations
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2788 , http://hdl.handle.net/10962/d1002998 , Uganda -- Politics and government , Uganda -- Economic conditions , World politics , International relations
- Description: This study argues that much of early post colonial Uganda's political developments, had its roots in the colonial patterns of governance. It was, however, the imperative of Uganda's early post colonial rulers to have formulated and maintained conditions for legitimate and orderly governance. Largely, this required a coherent political class with a mass based and mobilising political movement, that moreover had a political programme that catered for the interests of its support base. Indeed, their opting to negate these very prerequisite conditions, contributed greatly to Uganda's subsequent political disorder, and it's further marginalisation in the International Political Economy. This study suggests that since the impact of colonialism in Uganda, its governance policies have closely been linked to the broader dictates of the International Political Economy. A reality that the policy makers in post colonial Uganda should have realised, and in the process attempted to advantageously adapt to the Ugandan situation. Their was a qualitative improvement in Uganda's governance from 1986. This study illustrates that this was a result of the emerging into power of a political class, whose policies deliberately and strenuously attempted to fulfil the above mentioned criteria. Their is need to link Uganda's foreign and governance policies. Consequently a conscious and deliberate effort has to made by its policy makers, to ensure that the two are amicably adapted to each other, so as to derive the best possible benefits. For instance what Uganda needs in the existing New World Order are development, domestic and foreign investments and export markets for its produce. All of which can only be obtained if political order through a legitimate political system and government exists. With a leadership, that moreover, deliberately attracts foreign investments and creates the enabling conditions for competitive economic production. The onus is upon Ugandans to ensure that they institutionalise conditions for their appropriate governance and foreign policies. For this thesis argues that the International Political Economy is dynamic, and Uganda was never predestined to be at its margins.
- Full Text:
- Date Issued: 1996
Dindala
- Ngqoko music ensemble participants, Dargie, Dave
- Authors: Ngqoko music ensemble participants , Dargie, Dave
- Date: 1996
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: IsiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/342277 , vital:62874 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC339-01
- Description: Ngqoko music ensemble accompanied by clapping
- Full Text: false
- Date Issued: 1996
- Authors: Ngqoko music ensemble participants , Dargie, Dave
- Date: 1996
- Subjects: Folk music , Sacred music , Field recordings , Africa, Sub-Saharan , Africa South Africa Alice sa
- Language: IsiXhosa
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/342277 , vital:62874 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC339-01
- Description: Ngqoko music ensemble accompanied by clapping
- Full Text: false
- Date Issued: 1996
Discriminant analysis of the honeybee populations of southwestern Africa
- Radloff, Sarah E, Hepburn, H Randall, Robertson, Mark P, Van Hille, Robert P, Davidson, Z, Villet, Martin H
- Authors: Radloff, Sarah E , Hepburn, H Randall , Robertson, Mark P , Van Hille, Robert P , Davidson, Z , Villet, Martin H
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/451370 , vital:75044 , https://hdl.handle.net/10520/AJA10213589_176
- Description: The morphometric characters and sting pheromones of worker honeybees, Apis mellifera Linnaeus, were analysed by multivariate methods to characterize their populations in southwestern Africa. There is a discrete homogeneous population in northern South Africa and southern Namibia recognized as the subspecies A m. scutellata, a discrete population in northern Namibia recognized as A m. adansonii and a hybrid population between them.
- Full Text: false
- Date Issued: 1996
- Authors: Radloff, Sarah E , Hepburn, H Randall , Robertson, Mark P , Van Hille, Robert P , Davidson, Z , Villet, Martin H
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/451370 , vital:75044 , https://hdl.handle.net/10520/AJA10213589_176
- Description: The morphometric characters and sting pheromones of worker honeybees, Apis mellifera Linnaeus, were analysed by multivariate methods to characterize their populations in southwestern Africa. There is a discrete homogeneous population in northern South Africa and southern Namibia recognized as the subspecies A m. scutellata, a discrete population in northern Namibia recognized as A m. adansonii and a hybrid population between them.
- Full Text: false
- Date Issued: 1996
Distribution patterns of fishes in the head region of a turbid Eastern Cape estuary
- Ter Morshuizen, Leslie David
- Authors: Ter Morshuizen, Leslie David
- Date: 1996
- Subjects: Fishes -- South Africa -- Eastern Cape -- great fish river -- Geographical distribution
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5261 , http://hdl.handle.net/10962/d1005105 , Fishes -- South Africa -- Eastern Cape -- great fish river -- Geographical distribution
- Description: Two and a half years of data were collected from the Great Fish River and estuary using seine nets and gill nets to determine the fish species composition within these regions. The head region of the Great Fish River estuary was found to have a rich fish fauna, with the euryhaline marine fish component totally dominating the catch in all three regions. Gilchristella aesiuaria was the single most common species and several euryhaline marine species were captured in freshwater for the first time. Physical parameters were also measured in an effort to ascertain the possible factors which may affect the distribution and length frequency of the most common species within this area. Salinity was found to be the single most important factor affecting the species composition, and the sampling area was consequently divided into three regions, viz. river (< I ‰), head (1-4 ‰) and estuary (> 4 ‰). In addition, it was determined that river flow rate during the month prior to sampling also had a profound effect on species composition in all three regions. Based on the available evidence it is suggested that for most species this is related to conductivity levels rather than flow per se.
- Full Text:
- Date Issued: 1996
- Authors: Ter Morshuizen, Leslie David
- Date: 1996
- Subjects: Fishes -- South Africa -- Eastern Cape -- great fish river -- Geographical distribution
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5261 , http://hdl.handle.net/10962/d1005105 , Fishes -- South Africa -- Eastern Cape -- great fish river -- Geographical distribution
- Description: Two and a half years of data were collected from the Great Fish River and estuary using seine nets and gill nets to determine the fish species composition within these regions. The head region of the Great Fish River estuary was found to have a rich fish fauna, with the euryhaline marine fish component totally dominating the catch in all three regions. Gilchristella aesiuaria was the single most common species and several euryhaline marine species were captured in freshwater for the first time. Physical parameters were also measured in an effort to ascertain the possible factors which may affect the distribution and length frequency of the most common species within this area. Salinity was found to be the single most important factor affecting the species composition, and the sampling area was consequently divided into three regions, viz. river (< I ‰), head (1-4 ‰) and estuary (> 4 ‰). In addition, it was determined that river flow rate during the month prior to sampling also had a profound effect on species composition in all three regions. Based on the available evidence it is suggested that for most species this is related to conductivity levels rather than flow per se.
- Full Text:
- Date Issued: 1996
Does calcium constrain reproductive activity in insectivorous bats? Some empirical evidence for Schreibers’ long-fingered bat (Miniopterus schreibersii)
- Bernard, Ric T F, Davison, A
- Authors: Bernard, Ric T F , Davison, A
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/447231 , vital:74598 , https://www.ajol.info/index.php/az/article/view/154435
- Description: Insects are a poor source of dietary calcium and since they are seasonally abundant, it has been suggested that calcium availability may play a significant role in controlling the timing of reproduction in insectivorous bats. To assess the possible role of dietary calcium, we have measured bone calcium concentrations in female and male long-fingered bats (Miniopterus schreibersii) through a full reproductive cycle. The results indicate that winter was not a period of calcium stress and, therefore, that seasonal changes in insect abundance and dietary calcium availability are not a satisfactory explanation for the occurrence of delayed implantation in the long-fingered bat. Bone calcium concentrations of females did not differ significantly throughout pregnancy, indicating that the insects available in winter and early summer were sufficient to meet the calcium demands of pregnancy. Lactating females had the lowest bone calcium concentrations of all specimens, supporting the suggestion that lactation is indeed a period of severe calcium stress in aerial insectivores. We conclude that parturition is probably timed so that lactation coincides with the period of maximal insect abundance and corresponding dietary calcium availability.
- Full Text:
- Date Issued: 1996
- Authors: Bernard, Ric T F , Davison, A
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/447231 , vital:74598 , https://www.ajol.info/index.php/az/article/view/154435
- Description: Insects are a poor source of dietary calcium and since they are seasonally abundant, it has been suggested that calcium availability may play a significant role in controlling the timing of reproduction in insectivorous bats. To assess the possible role of dietary calcium, we have measured bone calcium concentrations in female and male long-fingered bats (Miniopterus schreibersii) through a full reproductive cycle. The results indicate that winter was not a period of calcium stress and, therefore, that seasonal changes in insect abundance and dietary calcium availability are not a satisfactory explanation for the occurrence of delayed implantation in the long-fingered bat. Bone calcium concentrations of females did not differ significantly throughout pregnancy, indicating that the insects available in winter and early summer were sufficient to meet the calcium demands of pregnancy. Lactating females had the lowest bone calcium concentrations of all specimens, supporting the suggestion that lactation is indeed a period of severe calcium stress in aerial insectivores. We conclude that parturition is probably timed so that lactation coincides with the period of maximal insect abundance and corresponding dietary calcium availability.
- Full Text:
- Date Issued: 1996
Does drafting beat "bleeding"? : an action research investigation into the introduction of a cognitivist process approach to the teaching of writing at senior secondary level
- McKellar, Elizabeth Jennifer Kelk
- Authors: McKellar, Elizabeth Jennifer Kelk
- Date: 1996
- Subjects: Action research in education English language -- Writing -- Study and teaching (Secondary)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1499 , http://hdl.handle.net/10962/d1003381
- Description: In this study an attempt is made to describe and illuminate the attitude of both pupils and teachers to the introduction of a cognitivist process approach to the teaching of written literacy in one standard in a multi-cuI tural Eastern Cape Model C secondary school. Because the cognitivist process approach to the teaching of written literacy was to complement already existing strategies for the teaching of written literacy, the research took the form of collaborative action research in three standard nine English classrooms. Teacher- and pupil diaries were the main means of data collection. Two spirals of action research were conducted in an attempt to identify difficulties and improve practice. Diaries and discussion revealed a positive response to the drafting, revision and editing processes which researchers had already identified as the processes which skilled writers use in creating text. Acknowledgement of the benefits to be derived from peer response as audience was also established. Anomalies relating to the grouping of pupils for peer-editing were found to be a key issue in determining the relative success of the project. Difficulties were also found to exist in the ability of some of the pupils to engage effectively in peer-peer and teacher-peer negotiation of text. Possible reasons for these difficulties have been identified , and further research into the nature of the inherent power relationships which exist implicitly in a multi-cultural educational setting and impede negotiation would be necessary to appreciate fully the difficulties experienced.
- Full Text:
- Date Issued: 1996
- Authors: McKellar, Elizabeth Jennifer Kelk
- Date: 1996
- Subjects: Action research in education English language -- Writing -- Study and teaching (Secondary)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1499 , http://hdl.handle.net/10962/d1003381
- Description: In this study an attempt is made to describe and illuminate the attitude of both pupils and teachers to the introduction of a cognitivist process approach to the teaching of written literacy in one standard in a multi-cuI tural Eastern Cape Model C secondary school. Because the cognitivist process approach to the teaching of written literacy was to complement already existing strategies for the teaching of written literacy, the research took the form of collaborative action research in three standard nine English classrooms. Teacher- and pupil diaries were the main means of data collection. Two spirals of action research were conducted in an attempt to identify difficulties and improve practice. Diaries and discussion revealed a positive response to the drafting, revision and editing processes which researchers had already identified as the processes which skilled writers use in creating text. Acknowledgement of the benefits to be derived from peer response as audience was also established. Anomalies relating to the grouping of pupils for peer-editing were found to be a key issue in determining the relative success of the project. Difficulties were also found to exist in the ability of some of the pupils to engage effectively in peer-peer and teacher-peer negotiation of text. Possible reasons for these difficulties have been identified , and further research into the nature of the inherent power relationships which exist implicitly in a multi-cultural educational setting and impede negotiation would be necessary to appreciate fully the difficulties experienced.
- Full Text:
- Date Issued: 1996
Domino Servite School: an evaluative case study of a private Christian secondary school in rural Natal
- Authors: Davidson, Michael R
- Date: 1996
- Subjects: Christian education -- South Africa Church schools -- South Africa Education -- South Africa -- Kwazulu Private schools -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1500 , http://hdl.handle.net/10962/d1003382
- Description: Domino Servite School (DSS) is a private school, founded in 1986, and situated on KwaSizabantu (KSB) mission station in the Natal midlands. This research into DSS is a case study which aims to present an illuminative evaluation in the Whole School genre, within that branch of educational research concerned with effective schools. The project aimed to make use of a compatibility paradigm accommodating nomothetic and anthropological data. In attempting triangulation of methodological approaches, it tried to establish the extent to which DSS may be considered an efficient and effective 'New Private' school. It also aimed to understand the school's raison d'ětre. In order to illuminate the relevance and social processes of DSS, evaluation made use of internal and external referents. The internal investigation sought to make judgements in reference to the efficiency of the school as an organisation. On the macro-level, whole school evaluation required extensive curriculum evaluation. On the micro-level, appraisal of teaching and assessment of pupil performance was undertaken. This internal investigation required a critical analysis of the school's formal, informal and hidden curriculum. The external evaluation sought to make judgement in reference to the effectiveness of DSS. On the macro-level, this required evaluation of the findings of the internal investigation in terms of a broader South African context. Implications, for example of the school's 'private' status, and its 'Christian' curriculum in respect of multi-culturalism, education for nationhood , and ethnicity were examined. The analysis of these dimensions paid attention to the school's spatial context in terms of both its 'rural' and missionary setting. Here the focus was on the school's formal curriculum. Analysis of the inter-relational context paid attention to its informal curriculum or the way in which the school deals with the commonality and diversity of its clientele and staff. The inter-relational context of the school examined the hidden curriculum, or the relationship between the school and the broader South African Community. A critical ethnographic account of this institution was therefore possible because of the dual focus on the internal and external evaluation reference points. Internal evaluation made extensive use of direct (non-participant) observation, structured and nonstructured interviews, questionnaires, and documentary analysis. Indirect (participant) observation, in particular Clinical Supervision (CS), was also used. Indirect (non-participant) observation made extensive use of Flanders' Interaction Analysis Categories (FIAC). Teacher self-evaluation was also included, while analysis of pupil performance made use of 'standardised' achievement testing and a tracer study. External evaluation required detailed study of local and international literature on issues relating to private schooling, rural and multi-cultural education, education for nationhood and ethnicity. The research found that much of the school's curriculum path is incongruous with its rural context largely because of its association with the former Department of Education and Training (DET), and because of its missionary heritage. As such the school is presently (1) located within a questionable (formal) curriculum tradition which has little relevance to, nor potential for, the transformational needs of either rural Natal or South Africa in general. However, this does not preclude the possibility of the school making a contribution to education for development in South Africa. (2) The school advocates a mono-cultural Christian value system and modified cultural pluralism which attempts to assimilate pupils from diverse socio-economic and ideologically homogeneous backgrounds. Multi-cultural education, plural values, religious and values democracy are therefore not part of the school's raison d'ětre. (3) The school, through its associated organisation Christians for Truth (CFT), represents a social view espousing either a modified cultural pluralism or multi-nationalism which allows for allegiance to a transcendent value system without compromising group. values and associations. This means that the school aims at assimilating or amalgamating diversity into a mono-cultural unity that transcends group identity. This transcendent culture is defined in Christian terms. The study recommends inter alia, further investigation into the educational implications of_values neutrality and the particularism of secular humanism; a comparative analysis of a random sample of private missionary schools and ordinary state controlled rural schools so that more generalisable results might be obtained; and a more thorough investigation into the parental and pupil contributions to the school, their attitudes and perspectives on missionary education and their feelings about the management styles evident in the organisation.
- Full Text:
- Date Issued: 1996
- Authors: Davidson, Michael R
- Date: 1996
- Subjects: Christian education -- South Africa Church schools -- South Africa Education -- South Africa -- Kwazulu Private schools -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1500 , http://hdl.handle.net/10962/d1003382
- Description: Domino Servite School (DSS) is a private school, founded in 1986, and situated on KwaSizabantu (KSB) mission station in the Natal midlands. This research into DSS is a case study which aims to present an illuminative evaluation in the Whole School genre, within that branch of educational research concerned with effective schools. The project aimed to make use of a compatibility paradigm accommodating nomothetic and anthropological data. In attempting triangulation of methodological approaches, it tried to establish the extent to which DSS may be considered an efficient and effective 'New Private' school. It also aimed to understand the school's raison d'ětre. In order to illuminate the relevance and social processes of DSS, evaluation made use of internal and external referents. The internal investigation sought to make judgements in reference to the efficiency of the school as an organisation. On the macro-level, whole school evaluation required extensive curriculum evaluation. On the micro-level, appraisal of teaching and assessment of pupil performance was undertaken. This internal investigation required a critical analysis of the school's formal, informal and hidden curriculum. The external evaluation sought to make judgement in reference to the effectiveness of DSS. On the macro-level, this required evaluation of the findings of the internal investigation in terms of a broader South African context. Implications, for example of the school's 'private' status, and its 'Christian' curriculum in respect of multi-culturalism, education for nationhood , and ethnicity were examined. The analysis of these dimensions paid attention to the school's spatial context in terms of both its 'rural' and missionary setting. Here the focus was on the school's formal curriculum. Analysis of the inter-relational context paid attention to its informal curriculum or the way in which the school deals with the commonality and diversity of its clientele and staff. The inter-relational context of the school examined the hidden curriculum, or the relationship between the school and the broader South African Community. A critical ethnographic account of this institution was therefore possible because of the dual focus on the internal and external evaluation reference points. Internal evaluation made extensive use of direct (non-participant) observation, structured and nonstructured interviews, questionnaires, and documentary analysis. Indirect (participant) observation, in particular Clinical Supervision (CS), was also used. Indirect (non-participant) observation made extensive use of Flanders' Interaction Analysis Categories (FIAC). Teacher self-evaluation was also included, while analysis of pupil performance made use of 'standardised' achievement testing and a tracer study. External evaluation required detailed study of local and international literature on issues relating to private schooling, rural and multi-cultural education, education for nationhood and ethnicity. The research found that much of the school's curriculum path is incongruous with its rural context largely because of its association with the former Department of Education and Training (DET), and because of its missionary heritage. As such the school is presently (1) located within a questionable (formal) curriculum tradition which has little relevance to, nor potential for, the transformational needs of either rural Natal or South Africa in general. However, this does not preclude the possibility of the school making a contribution to education for development in South Africa. (2) The school advocates a mono-cultural Christian value system and modified cultural pluralism which attempts to assimilate pupils from diverse socio-economic and ideologically homogeneous backgrounds. Multi-cultural education, plural values, religious and values democracy are therefore not part of the school's raison d'ětre. (3) The school, through its associated organisation Christians for Truth (CFT), represents a social view espousing either a modified cultural pluralism or multi-nationalism which allows for allegiance to a transcendent value system without compromising group. values and associations. This means that the school aims at assimilating or amalgamating diversity into a mono-cultural unity that transcends group identity. This transcendent culture is defined in Christian terms. The study recommends inter alia, further investigation into the educational implications of_values neutrality and the particularism of secular humanism; a comparative analysis of a random sample of private missionary schools and ordinary state controlled rural schools so that more generalisable results might be obtained; and a more thorough investigation into the parental and pupil contributions to the school, their attitudes and perspectives on missionary education and their feelings about the management styles evident in the organisation.
- Full Text:
- Date Issued: 1996
Drama in South African secondary schools meeting the challenges of educational change
- Authors: Carklin, Michael Larry
- Date: 1996
- Subjects: Drama in education -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2133 , http://hdl.handle.net/10962/d1002365 , Drama in education -- South Africa
- Description: South Africa is undergoing fundamental transformation at all levels of government and civil society, requiring a firm commitment to redressing the legacy of apartheid and to the development of South Africa's people. Part of this commitment is to undertake research which complements transformation processes, investigating the most appropriate ways to meet the challenges posed by such change. This study examines the potential of drama in the secondary school to meet key educational challenges, motivating strongly for the inclusion of drama as part of the formal curriculum in all schools. Social transformation has been greatly influenced by policy such as the Reconstruction & Development Programme (RDP) and subsequent Government White Papers which identify the need to develop South Africa's human resources as crucial. It is in this light, arid in the context of great disparity that exists across the education spectrum, that learning experiences of high quality must be provided in schools. It is argued that drama, as an lift form and an educational medium, is able to provide such qualitatively sound learning experiences because it is essentially learner-centered, experiential and holistic, offering unique ways of knowing, understanding and gaining insights. However, the classroom drama experience needs careful conceptualisation itself, particularly in view of the fact that life experiences of pupils are characteriseg by multiplicity and diversity within a new era of social and cultural mixing, as well as increased global interaction through, for example, the mass media and the internet. This study thus argues from a post-structuralist perspective, which embraces notions of multiplicity, proposing a reconceptualisation of the classroom drama experience that challenges the oppositional or binary perspectives that have previously characterised the way we think about drama and education. Example~ include art versus utilitarianism; process versus product; drama versus theatre. Investigating the classroom drama experierice in the light of developments in postmodern theatre, this study proposes that classroom drama should be seen as a form of theatre itself and suggests the term theatricalisaction to describe this classroom-theatre process which is based on action, reflection, experience and creative expression. It becomes a theatre of activity or an activating theatre. In this light classroom drama is considered in a specifically South Mrican context. In particular, this study examines the ways in which the following contexts impact upon the drama experience: the education system, the place of the arts within that system, and cultural and linguistic diversity in the classroom. Drawing on policy documentation, conference proceedings and studies that have been carried out in multiculturalism and multilingualism, the specific educational challenges facing South Africans are identified. In further exploring the potential of drama to meeting these challenges, this study documents the results of surveys conducted with drama teachers and with ~students who have studied drama as one of their formal subjects, highlighting in particular their perceptions, perspectives and experiences regarding the aims and value of drama education. Finally, in light of the information gained from teachers and learners, and of the concepts and contexts investigated, this thesis considers the ways in which the drama experience can contribute to meeting three primary educational challenges: the building of a culture of learning; the development and empowerment of pupils; and the embracing of cultural and linguistic diversity. This study concludes that drama is able to contribute significantly to educational change because of the teaching and learning processes it offers as an art form, and in particular, a theatre form. It is such a participatory, democratic classroom-theatre which provides a teaching and learning approach that should be at the core of transformation.
- Full Text:
- Date Issued: 1996
- Authors: Carklin, Michael Larry
- Date: 1996
- Subjects: Drama in education -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2133 , http://hdl.handle.net/10962/d1002365 , Drama in education -- South Africa
- Description: South Africa is undergoing fundamental transformation at all levels of government and civil society, requiring a firm commitment to redressing the legacy of apartheid and to the development of South Africa's people. Part of this commitment is to undertake research which complements transformation processes, investigating the most appropriate ways to meet the challenges posed by such change. This study examines the potential of drama in the secondary school to meet key educational challenges, motivating strongly for the inclusion of drama as part of the formal curriculum in all schools. Social transformation has been greatly influenced by policy such as the Reconstruction & Development Programme (RDP) and subsequent Government White Papers which identify the need to develop South Africa's human resources as crucial. It is in this light, arid in the context of great disparity that exists across the education spectrum, that learning experiences of high quality must be provided in schools. It is argued that drama, as an lift form and an educational medium, is able to provide such qualitatively sound learning experiences because it is essentially learner-centered, experiential and holistic, offering unique ways of knowing, understanding and gaining insights. However, the classroom drama experience needs careful conceptualisation itself, particularly in view of the fact that life experiences of pupils are characteriseg by multiplicity and diversity within a new era of social and cultural mixing, as well as increased global interaction through, for example, the mass media and the internet. This study thus argues from a post-structuralist perspective, which embraces notions of multiplicity, proposing a reconceptualisation of the classroom drama experience that challenges the oppositional or binary perspectives that have previously characterised the way we think about drama and education. Example~ include art versus utilitarianism; process versus product; drama versus theatre. Investigating the classroom drama experierice in the light of developments in postmodern theatre, this study proposes that classroom drama should be seen as a form of theatre itself and suggests the term theatricalisaction to describe this classroom-theatre process which is based on action, reflection, experience and creative expression. It becomes a theatre of activity or an activating theatre. In this light classroom drama is considered in a specifically South Mrican context. In particular, this study examines the ways in which the following contexts impact upon the drama experience: the education system, the place of the arts within that system, and cultural and linguistic diversity in the classroom. Drawing on policy documentation, conference proceedings and studies that have been carried out in multiculturalism and multilingualism, the specific educational challenges facing South Africans are identified. In further exploring the potential of drama to meeting these challenges, this study documents the results of surveys conducted with drama teachers and with ~students who have studied drama as one of their formal subjects, highlighting in particular their perceptions, perspectives and experiences regarding the aims and value of drama education. Finally, in light of the information gained from teachers and learners, and of the concepts and contexts investigated, this thesis considers the ways in which the drama experience can contribute to meeting three primary educational challenges: the building of a culture of learning; the development and empowerment of pupils; and the embracing of cultural and linguistic diversity. This study concludes that drama is able to contribute significantly to educational change because of the teaching and learning processes it offers as an art form, and in particular, a theatre form. It is such a participatory, democratic classroom-theatre which provides a teaching and learning approach that should be at the core of transformation.
- Full Text:
- Date Issued: 1996
Early Cretaceous alluvial palaeosols (Kirkwood formation, Algoa Basin, South Africa) and their palaeoenvironmental and palaeoclimatological significance
- Authors: Frost, Susan
- Date: 1996
- Subjects: Paleopedology -- South Africa -- Eastern Cape , Paleoclimatology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4939 , http://hdl.handle.net/10962/d1005551 , Paleopedology -- South Africa -- Eastern Cape , Paleoclimatology -- South Africa -- Eastern Cape
- Description: The Kirkwood Formation in the Bushman's River area of the Algoa Basin is characterised by a number of fining-upward cycles. These have been interpreted as indicating deposition in a dynamic aggrading meandering river system with the channel deposits (conglomerates grading upwards into sandstones) fining upward into the overbank deposits (mudrocks). Channel, channel-margin and overbank deposits were recognised. The three mudrock sequences logged comprise compound pedofacies sequences of multistorey, simple and cumulative palaeosols. Distinctive palaeopedological features, such as root traces and pedotubules, soil horizons and structures, mottles, and iron-rich and calcareous glaebules and calcareous hardpan lenses and layers were used to identify a number of palaeosols within the mudrock sequences. Each mudrock sequence comprises multistorey entisol, inceptisol, alfisol, ultisol, aridisol and vertisol profiles at different stags of pedogenic maturity. The entisols and inceptisols are relatively immature profiles formed close to the meandering river channel and are classified as channel-margin palaeosols. The ultisols, alfisols, aridisols and vertisols are more mature and formed at some distance from the channel. They are classified as proximal floodbasin or distal floodbasin palaeosols depending on their maturity, distance from the channel and grain-size. Slickensides, desiccation cracks, and iron-rich concretions occur, indicating multiple cycles of wetting and drying. A low water-table beneath the floodplain is indicated by both the prominent maroon-brown colouration of the mudstones, caused by oxidation during deposition, and the general lack of evaporites in the sequence. Calcretes comprising calcic and petrocalcic horizons are very common in the lower mudrock sequence, rare in the middle mudrock sequence and relatively common in the upper mudrock sequence. The calcretes generally consist a nodular zone which may, in some cases, be capped by a thin hardpan layer. The calcic palaeosols commonly show stages of carbonate accumulation which indicate at least 10 000 years of formation. The lack of calcrete formation in some of the profiles may indicate frequent flooding and high sediment accretion rates or a decrease in the influx of Ca²⁺-rich aeolian dust into the depositional basin. Clay alluviation is common in many of the profiles and soil structures are commonly well developed. The palaeosols are interpreted as having formed on an aggrading floodplain in a warm to hot (25-30°C), semi-arid climate with a low but seasonal rainfall (100-500mm per annum).
- Full Text:
- Date Issued: 1996
- Authors: Frost, Susan
- Date: 1996
- Subjects: Paleopedology -- South Africa -- Eastern Cape , Paleoclimatology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4939 , http://hdl.handle.net/10962/d1005551 , Paleopedology -- South Africa -- Eastern Cape , Paleoclimatology -- South Africa -- Eastern Cape
- Description: The Kirkwood Formation in the Bushman's River area of the Algoa Basin is characterised by a number of fining-upward cycles. These have been interpreted as indicating deposition in a dynamic aggrading meandering river system with the channel deposits (conglomerates grading upwards into sandstones) fining upward into the overbank deposits (mudrocks). Channel, channel-margin and overbank deposits were recognised. The three mudrock sequences logged comprise compound pedofacies sequences of multistorey, simple and cumulative palaeosols. Distinctive palaeopedological features, such as root traces and pedotubules, soil horizons and structures, mottles, and iron-rich and calcareous glaebules and calcareous hardpan lenses and layers were used to identify a number of palaeosols within the mudrock sequences. Each mudrock sequence comprises multistorey entisol, inceptisol, alfisol, ultisol, aridisol and vertisol profiles at different stags of pedogenic maturity. The entisols and inceptisols are relatively immature profiles formed close to the meandering river channel and are classified as channel-margin palaeosols. The ultisols, alfisols, aridisols and vertisols are more mature and formed at some distance from the channel. They are classified as proximal floodbasin or distal floodbasin palaeosols depending on their maturity, distance from the channel and grain-size. Slickensides, desiccation cracks, and iron-rich concretions occur, indicating multiple cycles of wetting and drying. A low water-table beneath the floodplain is indicated by both the prominent maroon-brown colouration of the mudstones, caused by oxidation during deposition, and the general lack of evaporites in the sequence. Calcretes comprising calcic and petrocalcic horizons are very common in the lower mudrock sequence, rare in the middle mudrock sequence and relatively common in the upper mudrock sequence. The calcretes generally consist a nodular zone which may, in some cases, be capped by a thin hardpan layer. The calcic palaeosols commonly show stages of carbonate accumulation which indicate at least 10 000 years of formation. The lack of calcrete formation in some of the profiles may indicate frequent flooding and high sediment accretion rates or a decrease in the influx of Ca²⁺-rich aeolian dust into the depositional basin. Clay alluviation is common in many of the profiles and soil structures are commonly well developed. The palaeosols are interpreted as having formed on an aggrading floodplain in a warm to hot (25-30°C), semi-arid climate with a low but seasonal rainfall (100-500mm per annum).
- Full Text:
- Date Issued: 1996
Economic incentives in controlling pollution in the South African leather industry
- Authors: Mowat, Shaun Phillip
- Date: 1996
- Subjects: Leather industry and trade -- South Africa , Tanneries -- Waste disposal -- Economic aspects
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:1010 , http://hdl.handle.net/10962/d1002745 , Leather industry and trade -- South Africa , Tanneries -- Waste disposal -- Economic aspects
- Description: The objective of the research was to ascertain whether, when compared to a system'of standards, the theoretical promise that economic incentives offered as a low cost solution to the abatement problem, would hold in practice. This was done by applying environmental economic theory to the practical problem of controlling the effluent generated by firms in the South African leather industry. It was found that in this instance the theory did indeed hold in practice. Furthermore, it was found that of the incentives discussed by the theory, marketable permits were the most economically efficient. It was however shown that a charge - not discussed in the ., theory - based on a central treatment agency's (CTA) cost of treatment offered the least cost solution to the abatement problem when the CTA could do at least some of the effluent treatment at a lower cost than the firms. - In addition a formula was developed to show the net benefits accruing to an individual firm if it undertook to treat its effluent. It was shown that in order to maximise the total benefits of treatment, a firm should treat until its net benefits of treatment were zero. A number of problem however were found to exist when the theory was applied to a practical situation. The most important was the "stepped" nature of the firms marginal abatement cost curves which meant that the setting of a charge based on a trial and error method would prove to be more difficult than the theory envisaged. Furthermore, it meant that no matter what method of pollution control was used, it would prove i~possible to reduce effluent to an optimal level. It was recommended that greater use be made of economic incentives to control all industrial effluent. It would nonetheless be necessary to do more research in this field as the theory was not tailor made for all practical situations. Further evidence of the viability of economic incentives could however encourage wider use by policy makers.
- Full Text:
- Date Issued: 1996
- Authors: Mowat, Shaun Phillip
- Date: 1996
- Subjects: Leather industry and trade -- South Africa , Tanneries -- Waste disposal -- Economic aspects
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:1010 , http://hdl.handle.net/10962/d1002745 , Leather industry and trade -- South Africa , Tanneries -- Waste disposal -- Economic aspects
- Description: The objective of the research was to ascertain whether, when compared to a system'of standards, the theoretical promise that economic incentives offered as a low cost solution to the abatement problem, would hold in practice. This was done by applying environmental economic theory to the practical problem of controlling the effluent generated by firms in the South African leather industry. It was found that in this instance the theory did indeed hold in practice. Furthermore, it was found that of the incentives discussed by the theory, marketable permits were the most economically efficient. It was however shown that a charge - not discussed in the ., theory - based on a central treatment agency's (CTA) cost of treatment offered the least cost solution to the abatement problem when the CTA could do at least some of the effluent treatment at a lower cost than the firms. - In addition a formula was developed to show the net benefits accruing to an individual firm if it undertook to treat its effluent. It was shown that in order to maximise the total benefits of treatment, a firm should treat until its net benefits of treatment were zero. A number of problem however were found to exist when the theory was applied to a practical situation. The most important was the "stepped" nature of the firms marginal abatement cost curves which meant that the setting of a charge based on a trial and error method would prove to be more difficult than the theory envisaged. Furthermore, it meant that no matter what method of pollution control was used, it would prove i~possible to reduce effluent to an optimal level. It was recommended that greater use be made of economic incentives to control all industrial effluent. It would nonetheless be necessary to do more research in this field as the theory was not tailor made for all practical situations. Further evidence of the viability of economic incentives could however encourage wider use by policy makers.
- Full Text:
- Date Issued: 1996
Electrocatalytic oxidation of cysteine by molybdenum (V) phthalocyanine complexes
- Mafatle, Tsukutlane J, Nyokong, Tebello
- Authors: Mafatle, Tsukutlane J , Nyokong, Tebello
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/293369 , vital:57079 , xlink:href="https://doi.org/10.1016/0022-0728(95)04519-8"
- Description: Chemically modified electrodes, constructed by incorporating oxomolybdenum(V) phthalocyanine (OMo(V)(OH)Pc, Pc = phthalocyanine dianion) into graphite powder were used to catalyse the oxidation of cysteine. Solution catalysis of cysteine by oxomolybdenum(V) tetrasulfophthalocyanine, [OMo(V)(OH)TSPc]4−, was also investigated. A considerable reduction in overpotential for cysteine oxidation was observed. Cysteine oxidation occurred at 0.26 and 0.28 V vs. Ag/vbAgCl for catalysis by Omo(V)(OH)Pc and [OMo(V)(OH)TSPc]4− respectively as opposed to 0.77 V vs. Ag/vbAgCl observed on CoPc chemically modified electrodes. The anodic peak currents vary linearly with cysteine concentration in the range 0.02 to 0.08 mol dm−3 and 0.008 to 0.02 mol dm−3 for [OMo(V)(OH)TSPc]4− and OMo(V)Pc respectively.
- Full Text:
- Date Issued: 1996
- Authors: Mafatle, Tsukutlane J , Nyokong, Tebello
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/293369 , vital:57079 , xlink:href="https://doi.org/10.1016/0022-0728(95)04519-8"
- Description: Chemically modified electrodes, constructed by incorporating oxomolybdenum(V) phthalocyanine (OMo(V)(OH)Pc, Pc = phthalocyanine dianion) into graphite powder were used to catalyse the oxidation of cysteine. Solution catalysis of cysteine by oxomolybdenum(V) tetrasulfophthalocyanine, [OMo(V)(OH)TSPc]4−, was also investigated. A considerable reduction in overpotential for cysteine oxidation was observed. Cysteine oxidation occurred at 0.26 and 0.28 V vs. Ag/vbAgCl for catalysis by Omo(V)(OH)Pc and [OMo(V)(OH)TSPc]4− respectively as opposed to 0.77 V vs. Ag/vbAgCl observed on CoPc chemically modified electrodes. The anodic peak currents vary linearly with cysteine concentration in the range 0.02 to 0.08 mol dm−3 and 0.008 to 0.02 mol dm−3 for [OMo(V)(OH)TSPc]4− and OMo(V)Pc respectively.
- Full Text:
- Date Issued: 1996
Epic into Romance: The Tempest 4.1 and Virgil's Aeneid
- Authors: Wright, Laurence
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/455641 , vital:75445 , https://hdl.handle.net/10520/AJA1011582X_95
- Description: At the conclusion of the betrothal masque for Ferdinand and Miranda, during the dance of the nymphs and reapers, Prospero calls out to the performing spirits," Well done, A void. No more." He has forgotten, as he tells us," that foul conspiracyl Of the beast Caliban and his confed-erates! Against my life"(4.1. 139-41). The entire spectacle vanishes into nothingness. Miranda and Ferdinand are taken aback. Miranda says she's never seen her father in such a state before. Prospero pretends that Ferdinand is alarmed, not by Prospero's own state of emotional disarray, but by the collapse of the masque. And he turns to Ferdinand and launches into what must be one of the three or four best-known speeches in Shakespeare: Be cheerful, sir; Our revels now are ended. These our actors, As I foretold you, were all spirits, and Are melted into air, into thin air, And, like the baseless fabric of this vision, The cloud-capped towers, the gorgeous palaces, The solemn temples, the great globe itself Yea, all which it inherit, shall dissolve, And, like this insub-stantial pageant faded, Leave not a rack behind. We are such stuff As dreams are made on, and our little life Is rounded with a sleep.(4.1. 148-158).
- Full Text:
- Date Issued: 1996
- Authors: Wright, Laurence
- Date: 1996
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/455641 , vital:75445 , https://hdl.handle.net/10520/AJA1011582X_95
- Description: At the conclusion of the betrothal masque for Ferdinand and Miranda, during the dance of the nymphs and reapers, Prospero calls out to the performing spirits," Well done, A void. No more." He has forgotten, as he tells us," that foul conspiracyl Of the beast Caliban and his confed-erates! Against my life"(4.1. 139-41). The entire spectacle vanishes into nothingness. Miranda and Ferdinand are taken aback. Miranda says she's never seen her father in such a state before. Prospero pretends that Ferdinand is alarmed, not by Prospero's own state of emotional disarray, but by the collapse of the masque. And he turns to Ferdinand and launches into what must be one of the three or four best-known speeches in Shakespeare: Be cheerful, sir; Our revels now are ended. These our actors, As I foretold you, were all spirits, and Are melted into air, into thin air, And, like the baseless fabric of this vision, The cloud-capped towers, the gorgeous palaces, The solemn temples, the great globe itself Yea, all which it inherit, shall dissolve, And, like this insub-stantial pageant faded, Leave not a rack behind. We are such stuff As dreams are made on, and our little life Is rounded with a sleep.(4.1. 148-158).
- Full Text:
- Date Issued: 1996