Theoretical aspects of the generation of radio noise by the planet Jupiter
- Authors: Deift, Percy A
- Date: 1972
- Subjects: Jupiter (Planet) , Radio astronomy , Radio noise
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5516 , http://hdl.handle.net/10962/d1011051 , Jupiter (Planet) , Radio astronomy , Radio noise
- Description: Decameter radiation was first observed from Jupiter by Burke and Franklin (JGR 60, 213, 1955). In 1964 Bigg (Nature, 203, 1008, (1964)) found that 1o exerted a profound effect on the radiation. The majority of the early theories to explain the origin of the decameter emissions, attributed the radiation to an emission process occurring at or near the electron gyrofrequency or the plasma frequency. Intro., p. 1. The majority of the early theories to explain the origin of the decameter emissions, attributed the radiation to an emission process occurring at or near the electron gyrofrequency or the plasma frequency (for a review see eg. Warwick, Space Sci. Rev. &" 841 (1967)). More recent work centred around the question of how 10 modulates the emission (see the article of Carr and Gulkis (Annual Review of Astronomy and Astrophysics Vol 8 (1970)) for a detailed review).
- Full Text:
- Authors: Deift, Percy A
- Date: 1972
- Subjects: Jupiter (Planet) , Radio astronomy , Radio noise
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5516 , http://hdl.handle.net/10962/d1011051 , Jupiter (Planet) , Radio astronomy , Radio noise
- Description: Decameter radiation was first observed from Jupiter by Burke and Franklin (JGR 60, 213, 1955). In 1964 Bigg (Nature, 203, 1008, (1964)) found that 1o exerted a profound effect on the radiation. The majority of the early theories to explain the origin of the decameter emissions, attributed the radiation to an emission process occurring at or near the electron gyrofrequency or the plasma frequency. Intro., p. 1. The majority of the early theories to explain the origin of the decameter emissions, attributed the radiation to an emission process occurring at or near the electron gyrofrequency or the plasma frequency (for a review see eg. Warwick, Space Sci. Rev. &" 841 (1967)). More recent work centred around the question of how 10 modulates the emission (see the article of Carr and Gulkis (Annual Review of Astronomy and Astrophysics Vol 8 (1970)) for a detailed review).
- Full Text:
A comparison of attitudes toward intensive competition among high school pupils
- Authors: Potgieter, Justus R
- Date: 1971
- Subjects: Competition (Psychology) in adolescence Competition (Psychology) Interpersonal relations Motivation (Psychology)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1930 , http://hdl.handle.net/10962/d1007604
- Description: From Preface: As a teacher with experience in competitive sport, the author became interested in the topic of athletic competition when joining the staff of an all-boys' school. The competitive aspect of sport at such a school can make quite an impression on an inexperienced teacher. The question then arose; Is this competitive atmosphere universal? Is this type of competition acceptable and desirable in our schools? Being a teacher of Physical Education as well as other subjects and also being actively involved in the coaching of senior sports teams the author regarded himself suitably qualified to investigate the matter of athletic competition in our schools.
- Full Text:
- Authors: Potgieter, Justus R
- Date: 1971
- Subjects: Competition (Psychology) in adolescence Competition (Psychology) Interpersonal relations Motivation (Psychology)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1930 , http://hdl.handle.net/10962/d1007604
- Description: From Preface: As a teacher with experience in competitive sport, the author became interested in the topic of athletic competition when joining the staff of an all-boys' school. The competitive aspect of sport at such a school can make quite an impression on an inexperienced teacher. The question then arose; Is this competitive atmosphere universal? Is this type of competition acceptable and desirable in our schools? Being a teacher of Physical Education as well as other subjects and also being actively involved in the coaching of senior sports teams the author regarded himself suitably qualified to investigate the matter of athletic competition in our schools.
- Full Text:
A contribution to the biology of warthog (Phacochoerus africanus, Gmelin) in the Sengwa region of Rhodesia
- Authors: Cumming, D H M
- Date: 1971
- Subjects: Warthog Warthog -- Physiology Warthog -- Ecology
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5843 , http://hdl.handle.net/10962/d1010740
- Description: To the AmaZulu a warthog is "inhlovudawana" or "little elephant"; to arrogant hunters it is the "poor man's rhinoceros"; to some writers of encyclopaediae it is a "grotesque and hideous beast"; to stockmen it has long been a carrier of diseases. Injury was added to insult with the discovery that the blood of these self-assured, often comical and certainly engaging animals supports the greater proportion of tsetse flies in the African savannas. Their significance as the primary hosts of Glossina morsitans Westw., the vectors of tryanosomiasis, justified an extended field study of warthog biology. This thesis reports four years of field work on warthogs, together with complementary observations of hand-reared warthogs (and their offspring) which roamed freely in the vicinity of the remote field station on which I live. The Sengwa Research Project, of which this study forms a part, was initiated in 1965 to study relationships between game animals and tsetse flies. One of the main problems investigated in the Sengwa Project is that of "host encounter" (Glasgow, 1961, Bursell, 1970) and how the distribution, abundance and behaviour of game animals may affect their availability to hungry tsetse flies. I have, accordingly, been concerned with discovering how warthog are dispersed in the Sengwa area and have attempted to gain some understanding of the factors, both environmental and social, which may affect or govern their dispersion and possibly population number. Intro. p. 1.
- Full Text:
- Authors: Cumming, D H M
- Date: 1971
- Subjects: Warthog Warthog -- Physiology Warthog -- Ecology
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5843 , http://hdl.handle.net/10962/d1010740
- Description: To the AmaZulu a warthog is "inhlovudawana" or "little elephant"; to arrogant hunters it is the "poor man's rhinoceros"; to some writers of encyclopaediae it is a "grotesque and hideous beast"; to stockmen it has long been a carrier of diseases. Injury was added to insult with the discovery that the blood of these self-assured, often comical and certainly engaging animals supports the greater proportion of tsetse flies in the African savannas. Their significance as the primary hosts of Glossina morsitans Westw., the vectors of tryanosomiasis, justified an extended field study of warthog biology. This thesis reports four years of field work on warthogs, together with complementary observations of hand-reared warthogs (and their offspring) which roamed freely in the vicinity of the remote field station on which I live. The Sengwa Research Project, of which this study forms a part, was initiated in 1965 to study relationships between game animals and tsetse flies. One of the main problems investigated in the Sengwa Project is that of "host encounter" (Glasgow, 1961, Bursell, 1970) and how the distribution, abundance and behaviour of game animals may affect their availability to hungry tsetse flies. I have, accordingly, been concerned with discovering how warthog are dispersed in the Sengwa area and have attempted to gain some understanding of the factors, both environmental and social, which may affect or govern their dispersion and possibly population number. Intro. p. 1.
- Full Text:
An investigation into religious instruction in state high schools in the Cape Province
- Authors: Penny, Alan Joseph
- Date: 1971
- Subjects: Religious education -- South Africa -- Cape of Good Hope Religious education of teenagers
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1933 , http://hdl.handle.net/10962/d1007641
- Description: From Preface: The question of religious instruction in Cape Schools first aroused my interest when I was subjected to anything but religious tnstruction during my own high school years. My desire to enquire into the whole position of religious instruction in the high school curriculum grew out of an essay on the role of religion in the education of the child which I wrote whilst reading for the B.Ed. degree. As background, I read Harold Loukes' classic Teenage Religion, and from then onwards, I felt that it was necessary to undertake an investigation of this kind in the Cape Province. My aim was not only prompted out of a desire to expose what I already knew to be an educationally and religiously unsound and unhealthy state of affairs, but more deeply because I, although an ignorant amateur in theology, am aware that too often the traditional religious foundations, poorly built by unintelligent teaching, are shaken, if not destroyed, by scientific discovery and material advancement.
- Full Text:
- Authors: Penny, Alan Joseph
- Date: 1971
- Subjects: Religious education -- South Africa -- Cape of Good Hope Religious education of teenagers
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1933 , http://hdl.handle.net/10962/d1007641
- Description: From Preface: The question of religious instruction in Cape Schools first aroused my interest when I was subjected to anything but religious tnstruction during my own high school years. My desire to enquire into the whole position of religious instruction in the high school curriculum grew out of an essay on the role of religion in the education of the child which I wrote whilst reading for the B.Ed. degree. As background, I read Harold Loukes' classic Teenage Religion, and from then onwards, I felt that it was necessary to undertake an investigation of this kind in the Cape Province. My aim was not only prompted out of a desire to expose what I already knew to be an educationally and religiously unsound and unhealthy state of affairs, but more deeply because I, although an ignorant amateur in theology, am aware that too often the traditional religious foundations, poorly built by unintelligent teaching, are shaken, if not destroyed, by scientific discovery and material advancement.
- Full Text:
An investigation into the sensory mechanisms underlying the two point threshold, with particular reference to the practice effect
- Authors: Gradwell, Peter Bertram
- Date: 1971
- Subjects: Sensorimotor integration , Perceptual-motor learning
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3209 , http://hdl.handle.net/10962/d1012085 , Sensorimotor integration , Perceptual-motor learning
- Description: The two point threshold was studied extensively by the psychophysical experimenters of the last century. More recent formulations in signal detection theory have suggested that the statements of these workers about absolute thresholds should be viewed with caution. This study investigates the two point threshold in the light of these formulations, and has two main aims :- (1) To state and deal with the problem of relating a limitation in perceptual ability, such as that which is represented by the two point threshold, to the receptor organisation of the body. (2) To demonstrate a practice effect on the two point threshold, and to consider this in the light of (1) above. To fulfil these two aims, a model of the neural mechanisms underlying the discrimination of two points applied to the skin is proposed, and this is able to accommodate what is known of the two point threshold. Although the model is simple it explicitly accounts for size transfer and the practice effect, and provides some clues as to the type of neural mechanism capable of producing them. The practice effect is demonstrated experimentally, and the results are then referred to the model proposed. The physiology of an organism sets the limits for its behaviour. 'The first aim is thus an important one, in that it considers a specific case of this general problem. And secondly, the practice effect on the two point threshold is typical of a number of fairly simple "learning" phenomena, which are part of the psychologists' study of learning.
- Full Text:
- Authors: Gradwell, Peter Bertram
- Date: 1971
- Subjects: Sensorimotor integration , Perceptual-motor learning
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3209 , http://hdl.handle.net/10962/d1012085 , Sensorimotor integration , Perceptual-motor learning
- Description: The two point threshold was studied extensively by the psychophysical experimenters of the last century. More recent formulations in signal detection theory have suggested that the statements of these workers about absolute thresholds should be viewed with caution. This study investigates the two point threshold in the light of these formulations, and has two main aims :- (1) To state and deal with the problem of relating a limitation in perceptual ability, such as that which is represented by the two point threshold, to the receptor organisation of the body. (2) To demonstrate a practice effect on the two point threshold, and to consider this in the light of (1) above. To fulfil these two aims, a model of the neural mechanisms underlying the discrimination of two points applied to the skin is proposed, and this is able to accommodate what is known of the two point threshold. Although the model is simple it explicitly accounts for size transfer and the practice effect, and provides some clues as to the type of neural mechanism capable of producing them. The practice effect is demonstrated experimentally, and the results are then referred to the model proposed. The physiology of an organism sets the limits for its behaviour. 'The first aim is thus an important one, in that it considers a specific case of this general problem. And secondly, the practice effect on the two point threshold is typical of a number of fairly simple "learning" phenomena, which are part of the psychologists' study of learning.
- Full Text:
Concerning most people
- Authors: Mann, Chris
- Date: 1971
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/459597 , vital:75845 , https://journals.co.za/doi/epdf/10.10520/AJA00284459_293
- Description: New Coin is one of South Africa's most established and influential poetry journals. It publishes poetry, and poetry-related reviews, commentary and interviews. New Coin places a particular emphasis on evolving forms and experimental use of the English language in poetry in the South African context. In this sense it has traced the most exciting trends and currents in contemporary poetry in South Africa for a decade of more. The journal is published twice a year in June and December by the Institute for the Study of English in Africa (ISEA), Rhodes University.
- Full Text:
- Authors: Mann, Chris
- Date: 1971
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/459597 , vital:75845 , https://journals.co.za/doi/epdf/10.10520/AJA00284459_293
- Description: New Coin is one of South Africa's most established and influential poetry journals. It publishes poetry, and poetry-related reviews, commentary and interviews. New Coin places a particular emphasis on evolving forms and experimental use of the English language in poetry in the South African context. In this sense it has traced the most exciting trends and currents in contemporary poetry in South Africa for a decade of more. The journal is published twice a year in June and December by the Institute for the Study of English in Africa (ISEA), Rhodes University.
- Full Text:
Creative processes in young children
- Authors: Styles, Irene Mavis
- Date: 1971
- Subjects: Creative ability in children , Creative thinking
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3244 , http://hdl.handle.net/10962/d1013327
- Description: Enthusiasm for developing creativity in the individual has been remarkably widespread - at least in America - over the past twenty-five years or so. The armed services, the arts and sciences, educational institutions, businesses and industries are recognising to a greater and greater extent, the urgent necessity of developing this relatively neglected aspect of people is personalities. Their reasons differ, of course, and usually the welfare of the individual himself is not the main concern. This is perhaps fortunate, as advances made on philanthropic grounds alone have never progressed very rapidly. In business and industry, new ideas are urgently needed for survival - this was especially evident after World War II which was, in the end, really a battle of ideas. The importance of this implication has not decreased with distance in time from that conflagration, indeed, individuals in the armed services are probably the people most deeply involved in and the most concerned with the problem of developing creative thought. "We are in a mortal struggle for the survival of our way of life", writes Guilford. "The need (for developing creativity) is a national crisis" says Anderson*. Intro., p. 1.
- Full Text:
- Authors: Styles, Irene Mavis
- Date: 1971
- Subjects: Creative ability in children , Creative thinking
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3244 , http://hdl.handle.net/10962/d1013327
- Description: Enthusiasm for developing creativity in the individual has been remarkably widespread - at least in America - over the past twenty-five years or so. The armed services, the arts and sciences, educational institutions, businesses and industries are recognising to a greater and greater extent, the urgent necessity of developing this relatively neglected aspect of people is personalities. Their reasons differ, of course, and usually the welfare of the individual himself is not the main concern. This is perhaps fortunate, as advances made on philanthropic grounds alone have never progressed very rapidly. In business and industry, new ideas are urgently needed for survival - this was especially evident after World War II which was, in the end, really a battle of ideas. The importance of this implication has not decreased with distance in time from that conflagration, indeed, individuals in the armed services are probably the people most deeply involved in and the most concerned with the problem of developing creative thought. "We are in a mortal struggle for the survival of our way of life", writes Guilford. "The need (for developing creativity) is a national crisis" says Anderson*. Intro., p. 1.
- Full Text:
Developmental studies of certain South African Ascostromatic ascomycetes
- Authors: Tim, Stephen K-M
- Date: 1971
- Subjects: Fungi -- Parasites Ascomycetes Pyrenomycetes -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4245 , http://hdl.handle.net/10962/d1007289
- Description: From General Introduction: Toward the last half of the nineteenth century, the structure and mode of development of the ascocarp has aroused much interest. De Bary (1887) recognised the fruiting bodies of the Ascomycetes as 'compound sporophores' made up of interwoven hyphae or of pseudoparenchyma consisting of a peripheral layer separate from an inner tissue. These fruiting bodies included the discocarp or apothecium, the pyrenocarp or perithecium and the cleistocarp or cleistothecium. The name, Pyrenomycetes, has been variously applied to a group of Ascomycetes but mainly to the perithecial types, inclusive of the true perithecia and the loculate forms. The perithecium itself was described as a 'cup-shaped discomycetous' sporocarp with margins incurved to form a pyriform structure (de Bary, 1887). The presence or absence of a stroma had been long considered as a basis for the separation of the major groups of the Ascomycetes. Separation on these grounds was found unacceptable as it grouped together clearly unrelated species or separated related ones. As the subdivisions of the pyrenomycetous Ascomycetes are dependent upon the morphological features of the ascocarp, it would be pertinent to discuss the following: a) The Stroma. b) The various forms of ascocarp which mayor may not be associated with such a stroma. i) Perithecia: free or immersed in a stroma. ii) Uni- or multiloculate stromata. c) The centrum, the details associated with the centrum and the use of these details in the taxonomy of the pyrenomycetes.
- Full Text:
- Authors: Tim, Stephen K-M
- Date: 1971
- Subjects: Fungi -- Parasites Ascomycetes Pyrenomycetes -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4245 , http://hdl.handle.net/10962/d1007289
- Description: From General Introduction: Toward the last half of the nineteenth century, the structure and mode of development of the ascocarp has aroused much interest. De Bary (1887) recognised the fruiting bodies of the Ascomycetes as 'compound sporophores' made up of interwoven hyphae or of pseudoparenchyma consisting of a peripheral layer separate from an inner tissue. These fruiting bodies included the discocarp or apothecium, the pyrenocarp or perithecium and the cleistocarp or cleistothecium. The name, Pyrenomycetes, has been variously applied to a group of Ascomycetes but mainly to the perithecial types, inclusive of the true perithecia and the loculate forms. The perithecium itself was described as a 'cup-shaped discomycetous' sporocarp with margins incurved to form a pyriform structure (de Bary, 1887). The presence or absence of a stroma had been long considered as a basis for the separation of the major groups of the Ascomycetes. Separation on these grounds was found unacceptable as it grouped together clearly unrelated species or separated related ones. As the subdivisions of the pyrenomycetous Ascomycetes are dependent upon the morphological features of the ascocarp, it would be pertinent to discuss the following: a) The Stroma. b) The various forms of ascocarp which mayor may not be associated with such a stroma. i) Perithecia: free or immersed in a stroma. ii) Uni- or multiloculate stromata. c) The centrum, the details associated with the centrum and the use of these details in the taxonomy of the pyrenomycetes.
- Full Text:
Die utopie und der deutsche utopische roman seit 1939
- Krueger, Gustav Adolf Ludwig Werner
- Authors: Krueger, Gustav Adolf Ludwig Werner
- Date: 1971
- Subjects: German fiction -- 20th century , German literature -- History and criticism
- Language: German
- Type: Thesis , Masters , MA
- Identifier: vital:3631 , http://hdl.handle.net/10962/d1012711 , German fiction -- 20th century , German literature -- History and criticism
- Description: Wie bei jeder wissenschaftlichen Untersuchung stellt sich auch hier, bei einer Arbeit über den utopischen Roman, die Frage nach einer Begriffsbestimmung. In diesem Fall geht es um eine genaue Umreissung der Begriffe "Utopie", "Staatsroman", "Utopischer Roman" oder auch "Utopia-Roman", vorausgesetzt, dass man diese Begriffe überhaupt als Gattungsbezeichnungen zu benutzen gewillt ist. Intro., p. 1.
- Full Text:
- Authors: Krueger, Gustav Adolf Ludwig Werner
- Date: 1971
- Subjects: German fiction -- 20th century , German literature -- History and criticism
- Language: German
- Type: Thesis , Masters , MA
- Identifier: vital:3631 , http://hdl.handle.net/10962/d1012711 , German fiction -- 20th century , German literature -- History and criticism
- Description: Wie bei jeder wissenschaftlichen Untersuchung stellt sich auch hier, bei einer Arbeit über den utopischen Roman, die Frage nach einer Begriffsbestimmung. In diesem Fall geht es um eine genaue Umreissung der Begriffe "Utopie", "Staatsroman", "Utopischer Roman" oder auch "Utopia-Roman", vorausgesetzt, dass man diese Begriffe überhaupt als Gattungsbezeichnungen zu benutzen gewillt ist. Intro., p. 1.
- Full Text:
Ecological studies on the non-parasitic larval stages of some tick species in the Eastern Cape Province of South Africa (Acarina : ixodidae)
- Londt, Jason G. H. (Jason Gilbert Hayden), 1943-
- Authors: Londt, Jason G. H. (Jason Gilbert Hayden), 1943-
- Date: 1971
- Subjects: Ticks -- Ecology -- South Africa -- Eastern Cape , Ixodidae -- Ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5862 , http://hdl.handle.net/10962/d1012777 , Ticks -- Ecology -- South Africa -- Eastern Cape , Ixodidae -- Ecology -- South Africa -- Eastern Cape
- Description: "Ticks have already been studied in our country and abroad. Progress in the field of taxonomy has probably been the most rapid and has culminated in a large number of papers and excellent monographs, but much more remains to be done. To produce an overall picture of the factors influencing the behaviour of the tick under natural conditions, studies have to be conducted on tick ecology and experimental physiology. We still have a lack of knowledge of host specificity, the selection of feeding sites on hosts and the nature of resistance to attacks by ticks. Because of the varied habits of different species of ticks, the first essential prerequisite is an adequate knowledge of their biology." (Jansen 1969). The above words sum up the position of research on ticks in southern Africa at the present time.
- Full Text:
- Authors: Londt, Jason G. H. (Jason Gilbert Hayden), 1943-
- Date: 1971
- Subjects: Ticks -- Ecology -- South Africa -- Eastern Cape , Ixodidae -- Ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5862 , http://hdl.handle.net/10962/d1012777 , Ticks -- Ecology -- South Africa -- Eastern Cape , Ixodidae -- Ecology -- South Africa -- Eastern Cape
- Description: "Ticks have already been studied in our country and abroad. Progress in the field of taxonomy has probably been the most rapid and has culminated in a large number of papers and excellent monographs, but much more remains to be done. To produce an overall picture of the factors influencing the behaviour of the tick under natural conditions, studies have to be conducted on tick ecology and experimental physiology. We still have a lack of knowledge of host specificity, the selection of feeding sites on hosts and the nature of resistance to attacks by ticks. Because of the varied habits of different species of ticks, the first essential prerequisite is an adequate knowledge of their biology." (Jansen 1969). The above words sum up the position of research on ticks in southern Africa at the present time.
- Full Text:
Effects of vigilance decrement on the recognition of embedded figures
- Authors: Daniel, Robert David
- Date: 1971
- Subjects: Perception -- Testing , Cognitive psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3202 , http://hdl.handle.net/10962/d1010961
- Description: Field independence was described by Witkin et al (1962) as the ability to separate an item perceived from its context. Here most experiments have used visually presented material where the subject was shown a simple geometrical figure and then a complex one containing the simple figure as part of it: the subject's task was to find and point out where the simple figure was hidden. Recent work has suggested that the skills involved in Witkin's tests might be associated with particular cultural backgrounds. This extension of Witkin's theory of field independence by Wober linked visual phenomena with those of a social and maturational nature: the ability to separate visual items from their context was shown to be aligned with the development of a sense of personal identity ; the person was considered to be an item set in a context or social field, be it family or society around him: an individual, depending on the way he was socialized as a child, may perceive the world analytically, if he did he was labelled field independent, if not he was field dependent. Intro. p.1.
- Full Text:
- Authors: Daniel, Robert David
- Date: 1971
- Subjects: Perception -- Testing , Cognitive psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3202 , http://hdl.handle.net/10962/d1010961
- Description: Field independence was described by Witkin et al (1962) as the ability to separate an item perceived from its context. Here most experiments have used visually presented material where the subject was shown a simple geometrical figure and then a complex one containing the simple figure as part of it: the subject's task was to find and point out where the simple figure was hidden. Recent work has suggested that the skills involved in Witkin's tests might be associated with particular cultural backgrounds. This extension of Witkin's theory of field independence by Wober linked visual phenomena with those of a social and maturational nature: the ability to separate visual items from their context was shown to be aligned with the development of a sense of personal identity ; the person was considered to be an item set in a context or social field, be it family or society around him: an individual, depending on the way he was socialized as a child, may perceive the world analytically, if he did he was labelled field independent, if not he was field dependent. Intro. p.1.
- Full Text:
Extractives of Leonotis and Euryops species
- Authors: Eagle, G A
- Date: 1971
- Subjects: Stereochemistry Leonotis -- Analysis Euryops -- Analysis Botanical chemistry
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4465 , http://hdl.handle.net/10962/d1011610
- Description: The isolation and structure determination of dubiin and leonitin, two new diterpenoid acetates from Leonotis dubia and Leonotis leonitis respectively, are discussed. The compounds are diterpenoids of the labdane type and are closely related to marrubiin. The proposed structures are based on chemical and spectral evidence. Dubiin, C₂₂H₃₀0₆̕ contains a tertiary hydroxy- group, a furan ring and a ó-lactone while leonitin, C₂₂H₃₀0₇̕ is a γ - dilactone. at C-20. Both compounds are unusual in being oxygenated The extraction of three Euryops species and the isolation of euryopsol, C₂₂H₃₀0₄̕̕ are also described. A furanoeremophilane structure containing three hydroxy- groups, one of which is at a bridgehead position, is proposed. Euryopsol is the first furanoeremophilanoid with a substituent attached at C-IO
- Full Text:
- Authors: Eagle, G A
- Date: 1971
- Subjects: Stereochemistry Leonotis -- Analysis Euryops -- Analysis Botanical chemistry
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4465 , http://hdl.handle.net/10962/d1011610
- Description: The isolation and structure determination of dubiin and leonitin, two new diterpenoid acetates from Leonotis dubia and Leonotis leonitis respectively, are discussed. The compounds are diterpenoids of the labdane type and are closely related to marrubiin. The proposed structures are based on chemical and spectral evidence. Dubiin, C₂₂H₃₀0₆̕ contains a tertiary hydroxy- group, a furan ring and a ó-lactone while leonitin, C₂₂H₃₀0₇̕ is a γ - dilactone. at C-20. Both compounds are unusual in being oxygenated The extraction of three Euryops species and the isolation of euryopsol, C₂₂H₃₀0₄̕̕ are also described. A furanoeremophilane structure containing three hydroxy- groups, one of which is at a bridgehead position, is proposed. Euryopsol is the first furanoeremophilanoid with a substituent attached at C-IO
- Full Text:
In community in Christ: a study of theological setting of the sacraments in the New Testament
- Authors: Moore, Basil S
- Date: 1971
- Subjects: Sacraments Sacraments (Liturgy)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1240 , http://hdl.handle.net/10962/d1007688
- Description: Introduction: Neville Clark has rightly warned against the attempt to approach the theology of the sacraments from a broad and general definition of a 'sacrament' from which we 'read off' a Christian doctrine of the sacraments without paying due regard to the biblical statements. Such an approach could not but obscure the essential differences between the sacraments, and the fact that they stem from historical roots. On the other hand, the specialist treatment of the sacraments which begins by making a detailed analysis of the biblical material fails to do justice to the wholeness of biblical theology and tends to treat the sacraments in isolation not only from each other but also from other aspects of Christian theology with which they are inalienably connected. Bearing in mind the difficulties inherent in both of these approaches, a fresh and more systematic approach is required.
- Full Text:
- Authors: Moore, Basil S
- Date: 1971
- Subjects: Sacraments Sacraments (Liturgy)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1240 , http://hdl.handle.net/10962/d1007688
- Description: Introduction: Neville Clark has rightly warned against the attempt to approach the theology of the sacraments from a broad and general definition of a 'sacrament' from which we 'read off' a Christian doctrine of the sacraments without paying due regard to the biblical statements. Such an approach could not but obscure the essential differences between the sacraments, and the fact that they stem from historical roots. On the other hand, the specialist treatment of the sacraments which begins by making a detailed analysis of the biblical material fails to do justice to the wholeness of biblical theology and tends to treat the sacraments in isolation not only from each other but also from other aspects of Christian theology with which they are inalienably connected. Bearing in mind the difficulties inherent in both of these approaches, a fresh and more systematic approach is required.
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Ironie en ek : aspekte van die ironie as struktuurfaktor in die romanwerke van Marnix Gijsen
- Authors: Steyn, Karin
- Date: 1971
- Subjects: Irony in literature , Gijsen, Marnix, 1899-1984 -- Criticism and interpretation , Dutch fiction -- 20th Century
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: vital:3635 , http://hdl.handle.net/10962/d1013287
- Description: From Nawoord, p. 182. Ironie word in Gijsen se oeuvre nie alleenlik op 'n besondere wyse gebruik as 'n vorm van spel met woorde ter versiering of tot vermaak van die leser nie, maar irornie vorm ook 'n allerbelangrikste aspek van die struktuur van sy verhale. Gijsen "gebruik" nie in die eerste plaas ironie om die een of ander doel te bereik nie. Sy werke is ironies, en 'n begrip van die ironiese struktuur is in elke verhaal essensieel vir "n begrip van die verhaal self.
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- Authors: Steyn, Karin
- Date: 1971
- Subjects: Irony in literature , Gijsen, Marnix, 1899-1984 -- Criticism and interpretation , Dutch fiction -- 20th Century
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: vital:3635 , http://hdl.handle.net/10962/d1013287
- Description: From Nawoord, p. 182. Ironie word in Gijsen se oeuvre nie alleenlik op 'n besondere wyse gebruik as 'n vorm van spel met woorde ter versiering of tot vermaak van die leser nie, maar irornie vorm ook 'n allerbelangrikste aspek van die struktuur van sy verhale. Gijsen "gebruik" nie in die eerste plaas ironie om die een of ander doel te bereik nie. Sy werke is ironies, en 'n begrip van die ironiese struktuur is in elke verhaal essensieel vir "n begrip van die verhaal self.
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Proton conduction in organic solids
- Authors: Chan-Henry, Robert Yatshein
- Date: 1971
- Subjects: Electrolytes -- Conductivity , Protons , Organic conductors , Organic solid state chemistry
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4446 , http://hdl.handle.net/10962/d1007729 , Electrolytes -- Conductivity , Protons , Organic conductors , Organic solid state chemistry
- Description: Dielectric, d. c. conductivity and electrolysis measurements have been made principally on solid imidazole and urea. Electrode effects, especially the development of a suitable protode, and techniques for detecting mobile protons in solids were pursued. The dielectric data have been correlated with the d. c. results. A mechanism for extrinsic proton conduction in urea has been proposed.
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- Authors: Chan-Henry, Robert Yatshein
- Date: 1971
- Subjects: Electrolytes -- Conductivity , Protons , Organic conductors , Organic solid state chemistry
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4446 , http://hdl.handle.net/10962/d1007729 , Electrolytes -- Conductivity , Protons , Organic conductors , Organic solid state chemistry
- Description: Dielectric, d. c. conductivity and electrolysis measurements have been made principally on solid imidazole and urea. Electrode effects, especially the development of a suitable protode, and techniques for detecting mobile protons in solids were pursued. The dielectric data have been correlated with the d. c. results. A mechanism for extrinsic proton conduction in urea has been proposed.
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Rhodes University Graduation Ceremony 1971
- Authors: Rhodes University
- Date: 1971
- Language: English
- Type: text
- Identifier: vital:8105 , http://hdl.handle.net/10962/d1004560
- Description: Rhodes University Graduation Ceremony on Friday 2nd April 1971 at 8 p.m.[and] on Saturday 3rd April 1971 at 10:30 a.m. in the University Great Hall.
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- Authors: Rhodes University
- Date: 1971
- Language: English
- Type: text
- Identifier: vital:8105 , http://hdl.handle.net/10962/d1004560
- Description: Rhodes University Graduation Ceremony on Friday 2nd April 1971 at 8 p.m.[and] on Saturday 3rd April 1971 at 10:30 a.m. in the University Great Hall.
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Some aspects of the effect of temperature on the respiratory and cardiac activities of the Cichlid Teleost Tilapia mossambica
- Authors: Josman, V
- Date: 1971
- Subjects: Fishes -- Effect of temperature on , Cichlids
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5859 , http://hdl.handle.net/10962/d1012613
- Description: The importance of the cichlid teleost Tilapia mossambica as a protein source, coupled with its remarkable adaptability, has resulted in its introduction into many water systems throughout the tropical, sub-tropical and even temperate regions of the world. However, its successful exploitation of these waters is dependent very largely upon the value of minimum temperatures and their duration. For e.g. Long et al (1961) has drawn attention to the tremendous mortalities of T. mossambica that occur in shallow water bodies during the precipitous temperature decreases that accompany the winter monsoons in Vietnam and other eastern countries, even at temperatures as high as 14 or 16º C. Coehe (1967) does not recommend stocking with T. mossambica where temperatures are not above 14º C all the time. Ailanson et al (1962) conclude, after an experimental study, that low temperatures (13º C or lower) in South African highveld dams in winter are certainly an important factor in the extensive mortalities of T. mossambica that have been reported from these dams. Jubb (1961) also reports that this species is often killed during a severe winter in Rhodesia. Intro., p.1.
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- Authors: Josman, V
- Date: 1971
- Subjects: Fishes -- Effect of temperature on , Cichlids
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5859 , http://hdl.handle.net/10962/d1012613
- Description: The importance of the cichlid teleost Tilapia mossambica as a protein source, coupled with its remarkable adaptability, has resulted in its introduction into many water systems throughout the tropical, sub-tropical and even temperate regions of the world. However, its successful exploitation of these waters is dependent very largely upon the value of minimum temperatures and their duration. For e.g. Long et al (1961) has drawn attention to the tremendous mortalities of T. mossambica that occur in shallow water bodies during the precipitous temperature decreases that accompany the winter monsoons in Vietnam and other eastern countries, even at temperatures as high as 14 or 16º C. Coehe (1967) does not recommend stocking with T. mossambica where temperatures are not above 14º C all the time. Ailanson et al (1962) conclude, after an experimental study, that low temperatures (13º C or lower) in South African highveld dams in winter are certainly an important factor in the extensive mortalities of T. mossambica that have been reported from these dams. Jubb (1961) also reports that this species is often killed during a severe winter in Rhodesia. Intro., p.1.
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Some aspects of the mission policy and practice of the Church of the Province of South Africa in Ovamboland, 1924-1960
- Authors: Mallory, Charles Shannon
- Date: 1971
- Subjects: Church of the Province of Southern Africa -- Namibia -- Owambo
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:1232 , http://hdl.handle.net/10962/d1007312 , Church of the Province of Southern Africa -- Namibia -- Owambo
- Description: This thesis is a study that was originally inspired by the question, "What does it mean to be a Christian in rural Africa today?" While the Church needs to ask this question everywhere in the world, from experience the writer believes it is especially germane to the non-Western cultures of Africa and Asia. That experience is drawn from eight years' work among the Kwanyama tribe of Ovambos in the Ovamboland Anglican Mission. Hence, this study is confined to one rural African tribe as it came under 46 years' influence of one Christian denomination.
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- Authors: Mallory, Charles Shannon
- Date: 1971
- Subjects: Church of the Province of Southern Africa -- Namibia -- Owambo
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:1232 , http://hdl.handle.net/10962/d1007312 , Church of the Province of Southern Africa -- Namibia -- Owambo
- Description: This thesis is a study that was originally inspired by the question, "What does it mean to be a Christian in rural Africa today?" While the Church needs to ask this question everywhere in the world, from experience the writer believes it is especially germane to the non-Western cultures of Africa and Asia. That experience is drawn from eight years' work among the Kwanyama tribe of Ovambos in the Ovamboland Anglican Mission. Hence, this study is confined to one rural African tribe as it came under 46 years' influence of one Christian denomination.
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The beginnings of urban segregation in South Africa : the Natives (Urban Areas) Act of 1923 and its background
- Authors: Davenport, T R H
- Date: 1971
- Subjects: Apartheid South Africa. Natives (Urban Areas) Act, 1923 Apartheid -- South Africa
- Language: English
- Type: Book , Text
- Identifier: http://hdl.handle.net/10962/2802 , vital:20327
- Description: A bad influenza epidemic hit South Africa in 1918, and in the words of the Department of Native Affairs it afforded to the general public a startling revelation of the distressing conditions under which the Natives live in our urban centres and to what a great extent these conditions were a standing menace to the health of the whole population, European and native alike. It was an incentive to press ahead with the urban areas legislation, and in this task the Department now had the assistance of two new bodies, the statutory Native Affairs Commission set up under the Native Affairs Act of 1920, and the Transvaal Local Government Commission under Colonel C. F. Stallard. The Department announced a revised Bill in its Report for 1922. It contained most of the clauses of the 1918 Bill had a pronounced welfare focus, and aimed to give local authorities necessary powers to provide adequate housing and services, if necessary by borrowing money and recouping themselves through trading ventures in the locations. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
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- Authors: Davenport, T R H
- Date: 1971
- Subjects: Apartheid South Africa. Natives (Urban Areas) Act, 1923 Apartheid -- South Africa
- Language: English
- Type: Book , Text
- Identifier: http://hdl.handle.net/10962/2802 , vital:20327
- Description: A bad influenza epidemic hit South Africa in 1918, and in the words of the Department of Native Affairs it afforded to the general public a startling revelation of the distressing conditions under which the Natives live in our urban centres and to what a great extent these conditions were a standing menace to the health of the whole population, European and native alike. It was an incentive to press ahead with the urban areas legislation, and in this task the Department now had the assistance of two new bodies, the statutory Native Affairs Commission set up under the Native Affairs Act of 1920, and the Transvaal Local Government Commission under Colonel C. F. Stallard. The Department announced a revised Bill in its Report for 1922. It contained most of the clauses of the 1918 Bill had a pronounced welfare focus, and aimed to give local authorities necessary powers to provide adequate housing and services, if necessary by borrowing money and recouping themselves through trading ventures in the locations. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
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The Birds' River dolerite complex
- Authors: Booth, P W K
- Date: 1971
- Subjects: Diabase , Diabase -- South Africa -- Cape of Good Hope -- Dordrecht. , Igneous rocks -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5043 , http://hdl.handle.net/10962/d1007664 , Diabase , Diabase -- South Africa -- Cape of Good Hope -- Dordrecht. , Igneous rocks -- South Africa
- Description: A plug-like intrusion of Karroo dolerite, near Dordrecht in the Eastern Cape of the Republic, is described. Field mapping with the, aid of aerial photographs has revealed that the contact of the intrusion, for the most part, dips very steeply outwards. In the south- eastern and eastern areas, however, sheet- or sill-like forms appear to be given off from the main intrusion. In plan view the intrusion is roughly oval shaped, its longer axis being aligned in a north-westerly direction. Its surface area measures approximately 60 square kilometres (24 square miles). A large number of xenoliths composed exclusively of Stormberg sediments, pyroclastic rocks and minor lavas, are to be found cropping out within the dolerite intrusion. These xenoliths, many of which occur in positions far above or below their normal stratigraphic elevation, are extremely variable in size - the largest having an area of approximately 15 square kilometres (6 square miles). The xenoliths represent fragments of the original "roof" of sediments and pyroclastics which have collapsed into and been engulfed by the dolerite magma. This type of dolerite intrusion is known as a "belljar" intrusion. A superficial classification of the dolerites, based chiefly on textural and certain mineralogical features, is presented. In the area surrounding the main intrusion are a number of dolerite dikes and sheets. The youngest phase of igneous activity is represented by the Dragon's Back dike, which cuts across the complex in a north-westerly direction. Several veining phenomena, as well as an interesting variety of metamorphic and metasomatic rocks, are associated with the main dolerite intrusion. Six diatremes are situated in the vicinity of the intrusion. Pyroclastic rocks are represented by a variety of types, and are to be found outside the area of the intrusion, and as xenoliths within it. A tentative interpretation of the mechanism of formation of the intrusion, which appears to be related to volcanic activity and cauldron subsidence, is presented.
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- Authors: Booth, P W K
- Date: 1971
- Subjects: Diabase , Diabase -- South Africa -- Cape of Good Hope -- Dordrecht. , Igneous rocks -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5043 , http://hdl.handle.net/10962/d1007664 , Diabase , Diabase -- South Africa -- Cape of Good Hope -- Dordrecht. , Igneous rocks -- South Africa
- Description: A plug-like intrusion of Karroo dolerite, near Dordrecht in the Eastern Cape of the Republic, is described. Field mapping with the, aid of aerial photographs has revealed that the contact of the intrusion, for the most part, dips very steeply outwards. In the south- eastern and eastern areas, however, sheet- or sill-like forms appear to be given off from the main intrusion. In plan view the intrusion is roughly oval shaped, its longer axis being aligned in a north-westerly direction. Its surface area measures approximately 60 square kilometres (24 square miles). A large number of xenoliths composed exclusively of Stormberg sediments, pyroclastic rocks and minor lavas, are to be found cropping out within the dolerite intrusion. These xenoliths, many of which occur in positions far above or below their normal stratigraphic elevation, are extremely variable in size - the largest having an area of approximately 15 square kilometres (6 square miles). The xenoliths represent fragments of the original "roof" of sediments and pyroclastics which have collapsed into and been engulfed by the dolerite magma. This type of dolerite intrusion is known as a "belljar" intrusion. A superficial classification of the dolerites, based chiefly on textural and certain mineralogical features, is presented. In the area surrounding the main intrusion are a number of dolerite dikes and sheets. The youngest phase of igneous activity is represented by the Dragon's Back dike, which cuts across the complex in a north-westerly direction. Several veining phenomena, as well as an interesting variety of metamorphic and metasomatic rocks, are associated with the main dolerite intrusion. Six diatremes are situated in the vicinity of the intrusion. Pyroclastic rocks are represented by a variety of types, and are to be found outside the area of the intrusion, and as xenoliths within it. A tentative interpretation of the mechanism of formation of the intrusion, which appears to be related to volcanic activity and cauldron subsidence, is presented.
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