Showing items 32861 - 32880 of 66233

Sarimbeta

- Kambazite Makorekore, Mang'anja men, Tracey, Andrew T N

Sigebenga

- Ngqoko married women villagers, Tracey, Andrew T N

Sikwakqeni

- Nonogcinile, Nomillion and group, Tracey, Andrew T N

Sisel' utywala

- Nonogcinile, Nomillion and group, Tracey, Andrew T N

Sobendiye

- Ngqoko young villagers, Tracey, Andrew T N

Students' conceptions of simple D.C. electricity circuits: a study of primary, inappropriate conceptions, learning difficulties of physics students, and implications for instruction

- Jiya, Zindlovu

  • Authors: Jiya, Zindlovu
  • Date: 1990
  • Subjects: Physical sciences -- Study and teaching (Secondary) -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5441 , http://hdl.handle.net/10962/d1001994
  • Description: The work attempts to identify the general conceptual problems of the generations of Black students who pass through flrst year physics courses at the University of Fort Hare. In particular the alternative conceptions of students in the area of direct current electricity are investigated, using various techniques including written diagnostic tests. The main method used in the investigation of the student frameworks is the personal interview. A varied number of inappropriate conceptions are identifled in the students in significantly large proportions, and these are found to be dependent on many factors; for example the socio-cultural background like language and its metaphors, and media images. It is established that some of these are exacerbated by student perceptions about the nature of physics and of the scientific enterprise in general. Certain proposals are made about how to remedy the situation; relying mainly on the recently established innovative instructional strategies like conceptual change and cognitive conflict, and on making proposals about restructuring certain forms of presentation of the subject matter, paying attention to how language is used to address the speciflc problems of the students. The importance of providing practical experiences for the students is also emphasised
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  • Date Issued: 1990

Synthetic and spectrometric investigation of 1,4-benzoxazepines

- Whittal, R D

  • Authors: Whittal, R D
  • Date: 1990
  • Subjects: Spectrum analysis , Benzodiazepines
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4381 , http://hdl.handle.net/10962/d1005046
  • Description: Flavanone (2,3-dihydro-2-phenyl-4H-benzopyran-4-one) and a series of 4'- and 7-halogeno derivatives were prepared from the corresponding 2'-hydroxychalcones [1-(2-hydroxyphenyl)-3-phenyl-2-propen-l-ones], which, in turn, were synthesized by aldol condensation of substituted 2'-hydroxacetophenones with various benzaldehydes. A series of 2,3-dihydro-2-phenyl-l,4-benzoxazepin-5(4H)-ones were prepared by ring expansion of the corresponding flavanones, via the Schmidt reaction, using trimethylsilylazide and trifluoroacetic acid. A series of tetrazoles {2,3-dihydro-2-phenyl-tetrazolo[1,5-d]-1,4-benzoxazepines} were also isolated as by-products of the Schmidt reaction. Flavanone oxime was synthesized for use in Beckmann reactions, and its molecular structure was determined by x-ray crystallography. Attempts to prepare 1,4-benzoxazepinone or its 1,5-analogue via Beckmann rearrangement of flavanone oxime, with polyphosphoric acid or phosphorus pentachloride catalysts, however, were unsuccessful. Several methods for introducing Δ²-unsaturation into the benzoxazepinone system were also examined. High resolution ¹H n.m.r., computer modelling, and molecular mechanics techniques were used to determine the conformations of the heterocycles of the benzoxazepinones and tetrazoles and results are compared with earlier studies in this field. Certain trends in the fragmentation patterns were observed in the low resolution mass spectra of the benzoxazepinones and tetrazoles, and high resolution mass spectrometric data were used to explore the major fragmentation patterns of these compounds.
  • Full Text:
  • Date Issued: 1990

Tankatara bushveld, Sunday's River, Port Elizabeth

- Vanderplank, Helen J

Tankatara bushveld, Sunday's River, Port Elizabeth

- Vanderplank, Helen J

Tankatara bushveld, Sunday's River, Port Elizabeth

- Vanderplank, Helen J

Tankatara bushveld, Sunday's River, Port Elizabeth

- Vanderplank, Helen J

Tankatara bushveld, Sunday's River, Port Elizabeth

- Vanderplank, Helen J

The Academic Freedom Lecture: Daantjie Oosthuizen Memorial Lecture - Rhodes University 1990

- Slabbert, Frederik van Zyl, 1940-2010

  • Authors: Slabbert, Frederik van Zyl, 1940-2010
  • Date: 1990
  • Subjects: Academic Freedom -- South Africa
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/291 , vital:19945
  • Description: In South Africa, Academic Freedom Lectures usually take place within the context of the Regime/State vs the University. They are largely confined to English/Liberal Universities and are seen as a protest against the Extention of the University Education Act of 1959. Academic Freedom lectures reflect a concern with the Regime/State's encroachment on the presumed autonomy of a University, ideological dogmatism, authoritarianism, repression and obviously in the South African case, racism and exploitation.
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  • Date Issued: 1990

The applicability of two simple single event rainfall-runoff models to catchments with different climate and physiography

- Beater, Anne Brenda

  • Authors: Beater, Anne Brenda
  • Date: 1990
  • Subjects: Hydrogeology Runoff -- South Africa Runoff -- United States Rain and rainfall -- South Africa Rain and rainfall -- United States
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4796 , http://hdl.handle.net/10962/d1001896
  • Description: The study presents the results of applying two isolated event, constant runoff proportion, conceptual models to a range of catchments drawn from various climatic and physiographic regions of South Africa and the USA. The models can be operated in either lumped or semi-distributed modes. The research progressed through the following stages. The initial stage involved the calibration of both models on two sets of catchments so that an initial evaluation of the performance of the models could be carried out and any deficiencies in the model structure identified, and where practical, corrected. The models were then calibrated on a further 8 catchments. An important result of the calibration is that for both models to produce reasonably acceptable simulations, at least one parameter has to vary between storms on the same catchment to account for variations in storm or antecedent moisture characteristics. The next stage consisted of compiling quantitative descriptions of the physical characteristics of the catchments and rainfall events and an attempt to relate the calibrated parameter values to relevant physical characteristics for the purpose of estimating parameter values when calibration is not possible. Despite the difficulties encountered in quantifying some of the hydrological characteristics the general trends exhibited by many of the relationships are encouraging and the format of the combinations of physical variables used, do make sense with respect to the original parameter conceptualisations. The relationships between storm characteristics and parameters of both models are less satisfactory. There is a high degree of scatter and the between-catchment variation in the form of the relationships, indicates that the derived relationships are likely to be of little use for parameter estimation purposes. The final stage involved a validation exercise in which new parameters were estimated from the physical variable-parameter relationships for all the catchments previously used, as well as a further four. The new parameters were used to re-simulate all the storms and comparison of these results were made with the original calibration results. Both models produced poor results and are unlikely to give reliable results where calibration is not possible. The parameter relationships for the parameters related to storm characteristics are so catchment specific that transfer to other areas will produce unpredictable results. Foot note:- For compatability with computer printouts decimal full stops are used in the format of real numbers in tables etc
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  • Date Issued: 1990

The development of professional short term reinsurance in South Africa : 1950-1985

- Laing, Angus Wallace

  • Authors: Laing, Angus Wallace
  • Date: 1990
  • Subjects: Reinsurance -- South Africa
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:926 , http://hdl.handle.net/10962/d1001452
  • Description: This thesis covers the history of short term reinsurance in South Africa from 1950 to 1985 and shows how it developed from a very limited market in which insurers generally relied on British and European professional reinsurers to a viable local market albeit with strong foreign support. The study demonstrates that the local reinsurance market grew in parallel with the development of the South African economy and the consequent need for extensive cover arising from the country's industrial expansion. It considers the different problems of the two waves of locally established reinsurers and the different circumstances prevailing in the two distinct eras of South African short term reinsurance. The conclusion reached is that, notwithstanding the varied results of individual reinsurers and the collapse of two local reinsurance companies, the market performed well and succeeded in meeting the needs of the South African short term insurance market
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  • Date Issued: 1990

The development of theology at Stellenbosch from 1859-1919

- Thom, Gideon

  • Authors: Thom, Gideon
  • Date: 1990
  • Subjects: Nederduitse Gereformeerde Kerk , Stellenbosch Theological Seminary
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:1215 , http://hdl.handle.net/10962/d1001544
  • Description: This study seeks to give an exposition of the development of theology at the Stellenbosch Kweekskool from 1859 until 1919, a period that coincided with the formative years of Afrikaner nationalism. John Murray (1826-1882) was nurtured in evangelical Calvinism but received his theological training in 'moderate' Utrecht. As Calvinist he emphasized salvation by grace and Christian obedience, as evangelical, union with Christ, and as kenoticist he emphasized the relevance of the humanity of Christ. N.J. Hofmeyr (1827-1909) was converted under an evangelical Lutheran and received his training in Utrecht, in the heyday of Dutch ethical and German mediating theology. He was fascinated by the historical Jesus. In his view, the 'religion of Jesus' was not the moralistic one imagined by the modernists, but an experience of sonship, continually challenged by severe temptations. The central theme of his theology was the huiothesia, the sonship of Jesus being the prototype of our sonship. As he was the spiritual father of many generations of Stellenbosch students, his Christocentric emphasis and his doctrine of huiothesia played an important role in the development of NGK spirituality. Other themes in Hofmeyr's theology bore the marks of mediating theology: The idea that the conscience is the voice of God, the 'natural' compatibility between the human and the divine, the importance of experience in the theological enterprise and the idea that grace must accommodate itself to nature. J.I. Marais (1848-1919) and P.J.G. de Vos (1842-1931), who received part of their training in Scotland, were more conservative in theology than Hofmeyr. By the turn of the century De Vos has fully accepted scholastic Calvinism and premillenniaIism; Marais accepted premillennialism around 1914. The experiences of the Anglo-Boer War precipitated the close relationship between the Afrikaner and the NGK, and the lack of a strong doctrine of the church in Stellenbosch theology added to the blurring of distinctions between church and people. The national church of the Scots and Dutch traditions became the volkskerk of the Afrikaner. Important biblical dimensions of Murray and Hofmeyr's theology were neglected after Hofmeyr's death. The conviction that God revealed himself completely in the human Christ was weakened by fundamentalism and the tendency to see God's will in the history of the volk. Their eschatology - which expected great success for the gospel - was replaced by premillennialism, which expected only limited success for missions before the parousia. Hofmeyr's social gospel, which was applied to the problem of the 'poor whites', was gradually replaced by a negative view of the social relevance of the gospel, especially in racial matters. This gradual change of theological direction involved a growing sympathy with fundamentalism and Kuyperianism, but did not consist in a full revival of reformation theology
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  • Date Issued: 1990

The effects of a personal growth programme on self esteem, loneliness and other indicators of divorce adjustment in a group of divorced women

- Harms-Smith, Linda

  • Authors: Harms-Smith, Linda
  • Date: 1990
  • Subjects: Divorced women -- Psychological aspects
  • Language: English
  • Type: text , Thesis , Masters , MSocSc
  • Identifier: vital:687 , http://hdl.handle.net/10962/d1002012
  • Description: Divorce is a major personal and social phenomenon, having a profound effect on those involved both directly or indirectly. The social work profession is faced with a large and vulnerable population at risk, and needs to take cognizance of the effects of divorce as well as the process of divorce adjustment in order to make a contribution in this area. Due to the significantly high divorce statistics, families and individuals are increasingly having to reorganise and adjust to the divorced status. This adjustment is a process which, if successfully negotiated, may ultimately lead to positive personal growth. Divorce, although extremely painful, may therefore paradoxically lead to growth and wholeness. It is during the stage of divorce adjustment that the social worker has a particular role to fulfil. Divorce adjustment may be assessed in terms of the attainment of positive functioning, making use of specific indicators for divorce adjustment. These indicators include self esteem; autonomy vs attachment; loneliness; parenting; social skills; and resolution of feelings around the divorce. Not only is there a need for the development of a clear measure for these indicators and therefore for divorce adjustment, but also for the development of a treatment approach specifically suited to the needs of divorcees in the process of post-divorce adjustment. The present researcher has aimed to address these issues by designing, implementing and then evaluating a personal growth programme and its effects on indicators of divorce adjustment. An extensive review of the literature was done. This covered the impact of divorce, the process of divorce adjustment, indicators of divorce adjustment, social work treatment approaches, and group work in divorce. An empirical study was then conducted whereby an experimental group was exposed to the group work treatment programme and a control group was not. A quasi-experimental design was used to measure the significance of changes in scores on various indicators of divorce adjustment. standardised measuring scales were used for the measurement of self esteem and loneliness, while a measure for indicators of divorce adjustment was especially designed for the purposes of this study. Both the experimental and control groups completed the measurements before and after the period of treatment. The present researcher designed a group work programme related to the needs of divorcees generally, and the needs identified by the participants in the study specifically. It was conducted over a period of ten weeks, consisting of ten one-and-a-half hour sessions. Eight divorced women attended the group. All had children and all had custody of their children. The programme included sessions on self esteem and self awareness; social skills (assertiveness and conflict resolution); loneliness; depression; and parenting. The sessions were structured and learning was based on experiential learning principles with brief didactic inputs. An eclectic approach was used by the researcher, drawing on theoretical models such as cognitive restructuring, gestalt techniques, psycho-drama, the client-centred approach and behaviourist techniques. An atmosphere of mutual support and feedback was encouraged and conscious use was made of self esteem/self-awareness building techniques. The main findings of the study showed that the personal growth programme (using a structured, skills training, self esteem/self awareness building, and experiential learning approach) had a significantly positive effect on self esteem and other indicators of divorce adjustment, but not on loneliness. The programme may therefore successfully be implemented in work towards divorce adjustment among divorced clients.
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  • Date Issued: 1990

The enlightenment and modern French studies

- Fein, Patrick L-M. (Patrick Louis-Marie), 1938-

The Eucharist and history

- Paterson, Torquil John Macleod

  • Authors: Paterson, Torquil John Macleod
  • Date: 1990
  • Subjects: Lord's Supper , History -- Religious aspects
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:1311 , http://hdl.handle.net/10962/d1018262
  • Description: The thesis delineates an existential view of history, in which the eternal is defined as the ground of authentic human life which underlies true historical action. The historical is the manifestation of the eternal in the unique moment, and redefines the ahistorical conditions of human life. The ahistorical is the social and ideological conditioning of all human knowledge, usually presented in terms of various kinds of myth and ritual . The ahistorical contains both good and bad elements, but always has the tendency to become oppressive and is therefore constantly in conflict with the historical. The life of Jesus is described as the perfect expression of the eternal in true historical action, by which he came into conflict with the ahistorical of his society, as expressed in his death. By his resurrection, his life breaks the limitations of time and becomes transformative enabling all subsequent historical action. The eucharist is described as engaging with each of these dimensions of our existence. By being itself a ritual action containing a myth, the eucharist has an ahistorical form and therefore easily engages with the ahistorical dimensions of society. However, without a constant dialogue with the historical, the eucharist, as an ahistorical medium, can become allied to the dominant forces of society and become a means of oppression. The eucharist has at its centre the remembrance of the historical action of Jesus. True historical action in the present will result from a proper hermeneutic of the gospels. The eucharistic anamnesis must be regarded as part of the wider search for a relevant contemporary christology. The eucharist remembers the Last Supper, which is a parable of the whole life of Jesus and a prelude to his death and is a sacrifice in that it has a sacrificial form, and leads to our historical action, which will usually take the form of a conflict with the ahistorical and have sacrificial dimensions. The eternal only becomes present in our historical action, but the eucharist, by uniting us with the transforming power of the death and resurrection of Jesus, is a powerful aid to such action. The eucharist also provides the opportunity for resonances between Jesus and the ground of our being, thus enabling deep shifts of attitude and consciousness. Three fundamental prerequisites for human life are isolated and related to the eucharist: belonging, nurturing and giving. In order for the eucharist to ennable historical action is must hold these dimensions in tension. In its actual form it does this through the balance between the Words of Institution and the Epiclesis, which, in turn, provide the christological ground of the eucharist and relate this to the present through a particular pneumatology. The real presence is described by the thesis in a way which connects the eucharistic presence with the historical Jesus and leads to our historical action. Finally, some consequences of the thesis for Eucharistic practice are suggested. The relationship between the ahistorical form of the eucharist and the anamnesis is important. In this way the eucharist objectifies the ahistorical, reflects on this in terms of the historical action of Jesus, and reforms the ahistorical by modelling a response. This should lead to a more authentic expression of the eternal in the contemporary world
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  • Date Issued: 1990

The evaluation of qualitative examination questions at matriculation level in physics

- Dixon, Charles Harwood

  • Authors: Dixon, Charles Harwood
  • Date: 1990
  • Subjects: Physics -- Study and teaching (Secondary) , Physics -- Examinations, questions, etc.
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1373 , http://hdl.handle.net/10962/d1001439
  • Description: The style and format of Physics examination papers has changed markedly over the past hundred years. Physics was regarded formerly as a sub-division of Mathematics; hence, apart from giving formal statements of scientific laws, and some account of experimental procedures, examination candidates were required to spend most of their time, and to earn most of their marks by solving numerical problems. Most Physics examination papers today retain the emphasis on problem-solving by calculation. It has been recognised, however, that the ability to obtain correct numerical answers by substition in a formula does not necessarily imply understanding of the physical principles which underly the problem. There has been a reaction against the awarding of marks for algebraic or arithmetical manipulation. Bloom and his disciples, by calling on examiners to define precise behavioural objectives, have encouraged the development of qualitative questions. These require no calculation nor numerical answer, but do aim to test the candidate's insight, by requiring him either to explain phenomena in scientific terms, or to predict the outcome of changing conditions. In this investigation samples of both quantitative and qualitative questions were extracted from Physics papers past and present. A closer study was made of qualitative questions used in the Natal Senior Certificate Physics papers (both Higher Grade and Standard Grade) in November 1987. The examiners were asked to state the objective of each question, as well as its categorization in terms of a simplified Bloom taxonomy. Candidates' answers to these questions were extracted from the scripts written at a representative sample of Natal schools. In the case of multiple-choice questions, an item analysis was performed, and discrimination indices were calculated . The responses of individual candidates to the longer questions were collected, classified and discussed. In each case the effectiveness of the question was studied, as to whether or not it was successful in detecting the presence of correct scientific concepts in the candidates' thinking. It was concluded that most of the qualitative questions used by the examiners were effective. Suggestions were made as to how their efficacy could be improved. Much further study and experimentation are needed to develop the effective use of this type of question
  • Full Text:
  • Date Issued: 1990
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