The study of hydroxyoximes and hydroxamic acids supported on macroporous resins and their use in the rapid seperation of metals
- Authors: Hemmes, Marlene
- Date: 1979
- Subjects: Chromatographic analysis , Separation (Technology) , Metal ions , Solvent extraction , Extraction (Chemistry) , Oximes , Metals -- Analysis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4453 , http://hdl.handle.net/10962/d1009512
- Description: Introduction: The macroporous Amberlite XAD resins were coated with LIX-64N and examined for the rate of uptake of copper . XAD-7 was by far the best support and gave a satisfactory rate of uptake up to loadings of 60% (w/w). The specific surface area of XAD-7 was measured by the adsorption of methylene blue from aqueous solution. The area of the wetted resin was five times less than that of the dry resin. LIX-65N was purified and the anti isomer characterised using spectroscopic techniques . The rate of uptake of copper was not improved by use of purified LIX-65N or by addition of LIX-63. XAD-7 coated with LIX-65N was used in columns. Elution curves for copper showed negligible tailing, and rapid separations of copper from iron (111), nickel, cobalt and magnesium by selective absorption were achieved. Copper was concentrated from very dilute solution at a flow rate of 50 ml min -1 ,and a 99% recovery was obtained. The method was applied to the rapid determination of copper in brass and bronze. A series of long-chain hydroxamic acids were synthesised and tested for suitability as stationary phase on XAD-7. Oleohydroxamic acid and naphthenohydroxamic acid were the most promising. The r ate of uptake of copper was reduced by the use of nonylphenol or amyl alcohol as a diluent. The capacities for copper of the hydroxamic acids were less when supported on XAD-7 than when used as liquid ionexchangers. The distribution coefficients of cobalt, nickel, zinc, lead, vanadium, uranium, iron (111) and copper were measured as a function of pH. XAD-7 coated with oleohydroxamic acid was used in columns for the rapid separation of iron (111) from copper and of copper from nickel, cobalt, lead and zinc. Copper was concentrated from very dilute solution at a flow rate of 45 ml min -1 and a 100,8% recovery was obtained. Copper was successfully separated from nickel by selective elution. The elution curves obtained show negligible tailing. The resin loaded with oleohydroxamic acid lost capacity due to chemical instability. Naphthenohydroxamic acid supported on XAD-7 was not suitable for use in columns, because it was physically unstable.
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- Date Issued: 1979
The geochemistry and petrology of the Karoo andesites and associated basalts of the north-eastern Cape Province
- Authors: Rumble, Keith Christopher
- Date: 1979 , 2013-02-11
- Subjects: Basalt , South Africa , Cape of Good Hope , Geochemistry , Petrology , Andesite
- Language: English
- Type: Thesis , Masters , M.Sc
- Identifier: vital:4902 , http://hdl.handle.net/10962/d1001562
- Description: New geochemical data consisting of major and 15 trace element analyses are presented for 41 rocks from three andesitic and associated basaltic rock occurrences in the North Eastern Cape Province. These include the Pronksberg, Belmore and Roodehoek localities. Field evidence suggests that the three andesites were emplaced during the early stages of Karoo volcanicity. Geochemical variations within the Pronksberg and Roodehoek andesite are small, manifesting the undifferentiated nature of the magmas. Variations within the Belmore andesite are interpreted as representing fractionation of orthopyroxene, accompanied by only minor plagioclase fractionation. Differences in trace element concentrations and inter-element ratios between the andesites and associated basalts of the Pronksberg and Belmore volcanic suites precludes the possibility of the two rock types being genetically related. Geochemical differences constrain the possibility of the three andesites being cogenetic. Magmatic processes resulting in their formation are, however, thought to be similar. The differences in chemistry between the Pronksberg Basalt (High K Type) and Pronksberg Basalt (Drumbo Type) are interpreted as representing the combined influence of weathering, the presence of amygdales and the within-flow variations of alkali elements on the Pronksberg Basalt (High K Type). Similarities in petrography and chemistry justifies a correlation of the Pronksberg Basalt (Drumbo Type) with the Drumbo Basalt Member in the Barkly East area. Data for the Drumbo Basalt (This study) in the Barkly East area confirms and complements previously presented data. Normative chemistry and strontium isotope data indicate a process involving crustal assimilation or melting of crustal rocks as being the most likely explanation for the genesis of the Karoo andesites , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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- Date Issued: 1979
No more masterpieces!' or 'The word made invisible!' : a chronicle (tragical - comical -postoral - historical) of a twentieth century theatrical triumph by Antonin Artaud and Peter Brook : inaugural lecture delivered at Rhodes University
- Authors: Sargeant, Roy
- Date: 1979
- Subjects: Theater
- Language: English
- Type: Text
- Identifier: vital:664 , http://hdl.handle.net/10962/d1020733 , ISBN 0868100323
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
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- Date Issued: 1979
A mineralogical investigation of co-existing iron-titanium oxides from various igneous rocks with special reference to some South African titaniferous iron ores
- Authors: Reynolds, Ivan Melvin
- Date: 1979
- Subjects: Igneous rocks Mineralogy
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4926 , http://hdl.handle.net/10962/d1004589
- Description: Part I consists of a detailied review of the available literature on the Fe- Ti oxides and their solid solution relationships. Particular attention is glven to the microstructures exhibited by these oxides and the hypotheses put forward to explain them. These data are synthesised and models are presented in which the microstructural developments in titaniferous magnetites amd ilmenites are explained in terms of current ideas on the influence of oxygen fugacity, exsolution mechanisms and crystal chemistry. These models have direct application to the microintergrowths observed in the naturally occurring Fe-Ti oxides from a wide range of igneous rocks. The available data on the minor and trace element chemistry of the Fe-Ti oxides are reviewed with particular reference to their variation in these minerals from different host rocks. The behaviour of the Fe-Ti oxides during secondary oxidation is discussed with particular reference to the oxidation of titaniferous magnetite and the weathering of ilmenite. The results of a mineralogical investigation into the co-existing Fe-Ti oxides from a range of igneous rocks including kimberlites, gabbros, dolerites, diabases, syenites, granophyres, granites and pegmatites are presented in Part 2 together with data on the ilmenites present in certain Eastern Cape beach sands. The kimberlite ilmenites are chemically distinct and can be readily distinguished on the basis of their relatively high MgO, Fe₂0₃ and Cr₂O₃ contents. They can also be distinguished from ilmenites from other igneous rocks on the basis of unit cell dimensions, d-spacings, reflectivities and micro-indentation hardness. The ilmenites from a wide range of basic to granitic igneous rocks exhibit a limited compositional range in which the MnO content appears to increase with increasing Si0₂ content. Relatively insensitive indirectly determined parameters such as unit cell dimensions, reflectivities and micro-indentation hardnesses cannot be used to distinguish between the ilmenites from the different rock types in these classes. The titaniferous magnetites exhibit progressively decreasing Ti0₂ contents from a maximum in the basic igneous rocks to a minimum in the granitic types. The titaniferous magnetite typically exhibits varying degrees of deuteric alteration, while the microstructures developed can be interpreted 1n terms of the models presented in Part 1. Part 3 represents an extension of Part 2 and deals with a mineralogical investigation of the titaniferous iron ores in five South African basic intrusions. The Bushveld and Kaffirskraal ores consist of multi-phase titaniferous magnetite grains containing crystallographically oriented ilmenite, ulvospinel and pleonaste microintergrowths. Minor coarser-grained ilmenite is also present. The Usushwana ores are texturally similar but contain abundant lamellar ilmenite in place of the ulvospinel. The primary features are well preserved in the unmetamorphosed Bushveld and Kaffirskraal ores. The Usushwana ores have been slightly metamorphosed resulting in the extensive replacement of the titaniferous magnetites by sphene and chlorite aggregates. The ores from these three complexes cannot be beneficiated by conventional ore-dressing techniques and require direct metallurgical treatment for the recovery of Fe, Ti0₂ and V₂O₅. The metamorphosed Mambula and Rooiwater ores have been recrystallised to a varying degrees and consist of multi-phase titaniferous magnetite grains containing modified ilmenite and pleonaste microintergrowths. These modified microstructures differ from those encountered in titaniferous magnetites from unmetnmorphosed basic rocks and their degree of modification can be related to the degree of met amorphism. Variable amounts of coarse granular ilmenite are also present and their development is related to the metamorphic grade and degree of recrystallisation. These ores can be partially beneficiated to yield ilmenite- and lower-Ti0₂ magnetite concentrates in which V₂O₅ contents of the magnetic fractions are higher than those of the original ores. The Trompsburg ores differ from those of the other complexes in that they are Mg-rich and are characterised by the presence of abundant olivine. The titaniferous magnetites typically exhibit well-defined ulvospinel cloth textures and are often surrounded by small amounts of graphite. They show evidence of a variety of extensive late-stage alteration features. The ores from the five investigated complexes are compared with similar ores from the Bushveld Complex. The ores from each complex can be readily distinguished on the basis of their chemical compositions and textural relationships. These features can be related to their crystallisation his tories and, in some cases, to post-crystallisation processes. The microstructural evolution of the ores from each complex is interpreted in terms of the models developed in Part I.
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- Date Issued: 1979
An automatic programming system to generate payroll programs
- Authors: Fielding, Elizabeth Vera Catherine
- Date: 1979
- Subjects: Computer software -- Development , Programming (computers) , Software architecture
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4695 , http://hdl.handle.net/10962/d1011829 , Computer software -- Development , Programming (computers) , Software architecture
- Description: The purpose of this project was to try to investigate one approach to the problem of automatically generating programs from some specification. Rather than following the approach which requires the user to define his problem using some formulation, it was decided to look at a class of problems that have similar solutions, but have many variations, and to try to design a system capable of obtaining user requirements and generating solutions tailored to these requirements. The aim was to design the system in such a way that it could be extended to cater for other classes of problems, so that eventually a system which could automatically generate program solutions for a range of problems might be developed. Intro. p. 1.
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- Date Issued: 1979
A comparison of the performance of selected conceptual models of the rainfall-runoff process in semi-arid catchments near Grahamstown
- Authors: Roberts, Peter J T
- Date: 1979
- Subjects: Runoff , Rainfall , South Africa , Grahamstown
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4798 , http://hdl.handle.net/10962/d1001898
- Description: A comparison of the performance of selected conceptual models of the rainfall-runoff process forms the central theme of this study and the comparison was conducted with three major objectives in mind. The first objective was to develop a conceptual model that could be used by practising hydrologists for the refinement and extension of historical streamflow records. The major requirements of the model were that it should be simple in structure and easy to operate and yet be flexible in terms of complexity of structure and input requirements as well as producing output at a level of accuracy that is competitive with that of the more complex models presently available. A comparison of the performance of the required model with that of other models formed an integral part of the development process. The second objective of the comparative study was to contribute to current knowledge of the criteria used in the selection of a suitable model for a particular application. There are, at present, no reliable guidelines to assist the hydrologist in selecting a suitable model from the wide range of models available and a comparative study would indicate the merits of various forms of model structure. The third objective is associated with the problems that arise when no streamflow data are available for model calibration. One approach is to calibrate the model in a nearby gauged catchment that the hydrologist regards as being 'hydrologically similar' and transferring the model parameter values to the ungauged catchment. Little is known about the feasibility of this parameter transfer process or about the choice of a model for such an application. The third objective was to test the feasibility of the parameter transfer process and to make use of the comparison of model performance to determine the model characteristics that are most suitable for the purpose
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- Date Issued: 1979
Oblique incidence investigations of the ionosphere over the Southern Ocean
- Authors: Rash, Jonathan Paul Stuart
- Date: 1979
- Subjects: Ionosphere Ionosphere -- Antartctic Ocean
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5438 , http://hdl.handle.net/10962/d1001991
- Description: The region of the South Atlantic and Southern Oceans ... is of considerable interest in ionospheric and aeronomic research owing to the presence of several 'anomalies'. The most notable of these is the South Atlantic (or Brazilian) Anomaly associated with the global minimum of magnetic field intensity off the coast of Brazil (Introduction, p. 1)
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- Date Issued: 1979
The quality of threat in modern painting
- Authors: Radford, Anne Margaret
- Date: 1979
- Subjects: Painting, Modern -- 20th century
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2453 , http://hdl.handle.net/10962/d1007578
- Description: From Introduction: We not only tolerate violence, we put it on the front pages of our newspapers. One-third or one-fourth of our television programmes use it for the amusement of our children. Condone! My dear friends, we love it." -Karl Menninger, psychiatrist. War is one of the most violent of man's past-times, yet many of the atrocities committed are termed heroic deeds. Andre Malraux, one of the leading writer-philosophers of his day, praised the international involvement by so many writers, artists, etc. in the Spanish Civil War as one of the most wonderful deeds of brotherhood in the history of mankind. There is a strange idolatry that is often accorded to violent criminals such as the early American outlaws, and people like Charles Manson, around whom an entire cult has sprung up. The "aggressive machismo" is something that boys and young men strive to achieve in most countries in the Western world. Scientlsts and philosophers have puzzled these paradoxes for centuries, and this effort to unravel the mystery of violence and aggression bears a fateful significant. For the quality of human life and the survival of man are involved. Robbery, rape, riots, vandalism, are all now part of man's existence. Around the world, violence has soared. In London, violent crimes increased by 39 per cent in three years. Even sports events (the soccer fans stage gang wars at most soccer matches nowadays, especially in England,) and entertainment ---books, movies, television--- have become permeated with violence. It has not always been as bad as this, and as art imitates life, life imitates art, and so aggressive paintings, threatening paintings are now commonplace. In this dissertation, I have studied this development of threat in painting. What follows is the course my study has taken.
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- Date Issued: 1979
Base-metal mineralization in alkaline pyroclastics: the Regenstein Vent, South West Africa
- Authors: Ferreira, C A M , Jacob, Roger E , Marsh, Julian S
- Date: 1979
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/133220 , vital:36950 , https://hdl.handle.net/10520/AJA10120750_1123
- Description: Geochemical analysis of soil samples taken from the area underlain by the Regenstein alkaline diatreme indicated potential areas for Pb-Zn-Ag mineralization, and these were subsequently proved by drilling. The pipelike body, emplaced into quartzites of the Damara Supergroup, consists of lithic and volcanic breccias. The breccias have been intruded, first by phonolite dykes, and then by numerous bodies of alkaline mafic and ultramafic rocks.
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- Date Issued: 1979
Rhodes Staff Association : questions for the Vice-Chancellor
- Authors: Henderson, Derek Scott
- Date: 1979
- Language: English
- Type: text
- Identifier: vital:7394 , http://hdl.handle.net/10962/d1017283
- Description: Rhodes Staff Association : questions for the Vice-Chancellor, 1979
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- Date Issued: 1979
Graaff-Reinet and the Great Depression (1929-1933)
- Authors: Minnaar, Anthony de V
- Date: 1979
- Subjects: Graaff-Reinet (South Africa) -- History , South Africa -- Economic conditions -- 1918-1961
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2518 , http://hdl.handle.net/10962/d1001847
- Description: The Depression of 1929-1933 was a world-wide phenomenon, in which "no aspect of the economy, no part of the world, escaped devastation". ¹ Accordingly the study of a medium sized rural town in South Africa during the period of the Depression, should show effects and reactions that were, in general, indicative of worldwide trends. In choosing Graaff- Reinet, I felt that being a close-knit community , with its urban and rural populations closely associated with each other, and the white, coloured and black sections of the population interdependent, it adequately represented a microcosm of South Africa as a whole. Then, too, Graaff- Reinet was ideally suited to illustrate the reality, that in South Africa during the Depression " the farmers were the most heavily hit of all". ² The single most significant product of the Graaff- Reinet district was wool, which at the time of the Depression was South Africa's second most important export, and consequently the well-being of the whole district depended largely on the market performance of this product . During the Depression the price of wool dropped drastically and the Graaff-Reinet farmers suffered in consequence . Graaff-Reinet also went, almost according to a blueprint, through the general phases of the Depression. The privations of the farming community led to the financial embarrassment of the local financial institutions causing their collapse , which in its turn led to the widespread hardship of everyone in the town. But these events all had a particular Graaff-Reinet quality, and the twists to the general outline are rooted deep in the local character of the district . Historically Graaff-Reinet is extremely interesting. It is the fourth oldest town in South Africa, being established in 1786, and in studying Graaf-Reinet one cannot but become conscious of the immense tradition and the awareness of history , which all its people have. The study itself starts with a general outline of the Worldwide Depre ssion, its causes and results, then moves on to the Depression in South Africa . The study of Graaff-Reinet in the Depression is divided into three basic sections, the Farmers, the Townspeople, and the Politics of Graaff-Reinet during the Depression. All three contain their own sub-divisions dealing with different aspects. In the Graaff-Reinet sections are included references to national events, tying them to, and explaining the course of, local happenings. In short the study becomes the story of how the Depression effected the people of Graaff-Reinet, how they suffered during this period and how they reacted to it. A final concluding section deals with their general recovery from the Depression. ¹ Heaton, H. : Kruger, D. W. The Economic History of Europe. p. 696. ²The Making of a Nation; a history of the Union of South Africa 19l0 - 1960. p. 158.
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- Date Issued: 1979
Sedimentology of the Katberg sandstone in the Eastern Cape Province
- Authors: Stavrakis, Nicholas
- Date: 1979 , 2013-10-16
- Subjects: Sedimentology -- South Africa -- Eastern Cape , Geology, Stratigraphic -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5034 , http://hdl.handle.net/10962/d1007355 , Sedimentology -- South Africa -- Eastern Cape , Geology, Stratigraphic -- South Africa -- Eastern Cape
- Description: The Katberg Sandstone is an arenaceous formation occuring stratigraphically three querters of the way up in the Beaufort Group in the south-eastern part of the main Karoo basin. A sedimentological study was carried out on the Katberg Sandstone and adjacent formations, in a 2 000 km² area south of Queenstown. Stratigraphic sections were measured and lithofacies based on the style of Miall (1977) were established for the Katberg Sandstone, Balfour and Burgersdorp Formations. Stratigraphic relationships show that the Burgersdorp Formation in the study area, is the lateral (distal) equivalent of the Katberg Sandstone. The changeover from sandstone to predominantly shale lithology occurs roughly east-west between Cathcart and Whittlesea. Stream hydraulic theory is discussed and the sedimentary structures of the various lithofacies are explained in terms of this theory. An analysis was done of thirty-four palaeochannels, and their various ancient flow characteristics were derived via multiple regression equations and a FORTRAN computer program. A statistical analysis of bedform structures, showed that flat-bedding of the upper flow regime is the dominant sedimentary structure of the Katberg Sandstone. Trough cross-bedding originating in aqueous dunes and planar cross-bedding of transverse bars, are fairly well represented while ripples are virtually absent. The opposite applies to the Balfour Formation where lower flow regime structures, viz., ripple cross-lamination and trough cross-bedding predominate. There is an even spread of (upper) flat-bedding, trough cross-bedding and ripple cross-lamination in the Burgersdorp Formation. Detailed measurement of typical short sequences from sections of the three formations, and transition matrix analyses, showed the facies assemblages to be of three stream types: (i) Katberg type: similar to Platte type of Miall (1977). Sediments were deposited by swiftly flowing, low sinuosity, braided, ephemeral streams with a predominantly sand bedload. Each flow started with preconsolidated silt and mud (flakes), and movement of exogenetic pebble lags. Channel avulsion and deposition of mud drapes in higher topographic levels of the stream were common phenomena. (ii) Balfour type: characterised by lateral accretion point bar type sequences of high sinuosity streams, and vertical accretion floodplain deposits. Lower flow regime dune and ripple bedform structures overlying (upper) flat-beds indicate a loss of stream power with channel migration. (iii) Burgersdorp type: similar to Katberg type for sandstone units, also crevasse-splays onto thick subaerially exposed floodplain aggradation reddish shales. Conventional microscopy and SEM studies showed tremendous diagenetic effects mostly in the form of secondary quartz growth in the sandstones of the three formations. Electron microprobe analyses were done on titanomagnetite grains from heavy mineral layers of the Katberg Sandstone, so that thermometric predictions could be made on provenance rocks. Palaeocurrents of the Katberg Sandstone are mostly Rank 4 and 5 types (Miall, 1974), i.e., they were generated within bars with not much change in stream orientation. Burgersdorp and Balfour formation palaeocurrents are Rank 1 - 3 types. In the case of the former this is owing to directional changes in channels as a result of frequent crevasse-splays, and in the case of the latter owing to differences in orientation between entire tracts of highly sinuous palaeostreams. Palaeocurrent directions in the Katberg Sandstone indicate a southeasterly provenance which accords with the findings of other Beaufort Group workers. Bed relief index calculations (Smith, 1970), made on Katberg rocks, considered together with the abundance of planar cross-bedding (of transverse bars) and apparent absence of longitudinal bars, testify to the deposition of the Katberg Sandstone in the distal parts of the braided stream environment. The Beaufort sediments of the study area have the sedimentological characteristics of a molasse sequence, but a different implied tectonogenesis. During Balfour sedimentation the equilibrium base was being raised very slowly at the source and complete fluvial sequences were deposited under a humid temperate climate, on a slowly subsiding plain. During Katberg/Burgersdorp times, source area tectonism was pronounced but interrupted and incomplete sequences were deposited under an arid climate. Provenance rocks for the formations studied included biotite mesoperthitic granite, granulite, charnockite, granite porphyry, granophyre, metaquartzite, greenschist and possibly diorite, epidosit e and alkaline volcanic rocks. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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- Date Issued: 1979
Lesniewski's logic aspects of his protothetic, ontology and mereology
- Authors: Norman, Max
- Date: 1979
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:21148 , http://hdl.handle.net/10962/6596
- Description: Stanislaw Lesniewski (1886-1939) was professor of Philosophy of Mathematics at the University of Warsaw from 1919 until his death. He played a leading role in the Warsaw school of logic and had a lasting influence on many of its members. Lesniewski constructed his first description of mereology in colloquial language and in the absence of a secure logical foundation. In order to effectively distinguish between the collective and distributive notions of class, further description of the distributive notion was necessary. He therefore formalized the distributive concepts in his theory of ontology. Henceforth "ontology" will be used specifically to refer to this theory of Lesniewski. Finally, the construction of protothetic (a system of propositional logic) provided a sound logical foundation of Lesniewski's ontology and mereology. Protothetic, together with his prescribed rules of procedure and his grammar of semantic categories, also facilitated the formalization of his systems in a logically rigorous manner. All of the researchers acknowledge that one of Lesniewski's most fundamental achievements was the development of his deductive systems (protothetic, ontology and mereology).
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- Date Issued: 1979
A taxonomic study of the Genus Lethrinops Regan (Pisces: Cichlidae) from Lake Malawi: part 3
- Authors: Eccles, David H , Lewis, Digby S C
- Date: 1979
- Subjects: Lethrinops -- Malawi, Lake -- Classification , Haplochromis -- Malawi, Lake -- Classification
- Language: English
- Type: Text
- Identifier: vital:15007 , http://hdl.handle.net/10962/d1019730 , ISBN 0868100021 , Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology; No. 38
- Description: The group of species considered all have short moderate snouts and a group of slightly to strongly enlarged teeth on the lower pharyngeal bone, the anterior and lateral teeth of which are biscupid, with the posterior cusp turned forwards. Lethrinops parvidens Trewavas, L. aurita (Regan), L. macrophthalmus (Boulenger), L. macrochir (Regan), L.longimanus Trewavas and L. macracanthus Trewavas are re-described, and L. mylodon n. sp. is described, the latter being divided into two geographically seperated sub-species. While L. longimanus and L. macracanthus co-exist with very slight overlap of morphological characters in the south of Lake Malawi, an apparently intermediate population is reported from another part of the Lake. , Rhodes University Libraries (Digitisation)
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- Date Issued: 1979
Software engineering: inaugural lecture delivered at Rhodes University
- Authors: Williams, M H
- Date: 1979
- Subjects: Computer programming , Programming languages (Electronic computers)
- Language: English
- Type: Text
- Identifier: vital:680 , http://hdl.handle.net/10962/d1020749 , ISBN 0868100102
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
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- Date Issued: 1979
Satan and Lucifer: a comparison of their metamorphoses from Angel to Devil in Milton's Paradise lost and Vondel's Lucifer and Adam in Ballingschap
- Authors: Paterson, Lynette
- Date: 1979
- Subjects: Milton, John, 1608-1674 Vondel, Joost van den, 1587-1679
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2184 , http://hdl.handle.net/10962/d1001837
- Description: The aim of this thesis is to compare the poetic delineation of the character of Satan in Paradise Lost with that of Lucifer in Lucifer and Adam in Ballingschap, and to consider the influence of the genre in each case , not in order to prove similarities or differences , but rather to allow the characters to illuminate each other. Both Satan and Lucifer develop progressively from angel to devil in the course of the poem or play. However, this process is more than just a physical metamorphosis, or even a moral degeneration. It is in each case a process of identity change, intensely and consciously experienced by the character. The fall is a movement from God to Self. The unfallen creature's integrity consists in his submergence in the Being and Will of God; for the fallen creature integrity means a separate, independent self-hood. In rebelling against their role and duty as Archangel, Satan and Lucifer rebel against submergence in the Being of God and thus against their very nature and the order of things. Consequently they experience personal and psychological disintegration. From this condition of imbalance and uncertainty they both develop to a new state of personal reintegration and unequivocal identity, now as Arch-fiend. In neither case is the process instant or entirely concurrent with the physical fall into Hell. Rather, it is protracted, hence the division of this thesis into sections that focus on the different stages in the development: Archangel, Arch-rebel and Arch- fiend (introduction, p. ii-iii).
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- Date Issued: 1979
Land, labour and African affairs, 1924-1934
- Authors: Lacey, Marian
- Date: 1979
- Subjects: Apartheid -- South Africa -- History , Land tenure -- South Africa , Labor and laboring classes -- South Africa , South Africa -- Politics and government -- 1909-1948
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2581 , http://hdl.handle.net/10962/d1004602
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- Date Issued: 1979
A computer-controlled tracking system
- Authors: Oberem, Graham Edmund
- Date: 1979
- Subjects: Artificial satellites -- Tracking
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5437 , http://hdl.handle.net/10962/d1001990
- Description: A computer-controlled tracking system has been designed and constructed for the two metre antenna of the 22 GHz radio telescope at Rhodes University. The control system has been tested and its step response has been analysed with a view to response time optimization. Computer programs for tracking the sun and the moon have been written. Initial results of tracking the sun have revealed linearity and temperature stability problems. These problems have been investigated and suggestions have been made as to how they might be removed
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- Date Issued: 1979
Dispersal of the cochineal insect Dactylopius Austrinus de Lotto (Homoptera : Dactylopiidae)
- Authors: Gunn, Brian Howard
- Date: 1979
- Subjects: Cochineal insect--South Africa , Cochineal insects , Biological control , Jointed cactus , South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5596 , http://hdl.handle.net/10962/d1002046
- Description: Dispersal of the cochineal insect Dactylopius austrinus De Lotto, introduced into South Africa in 1932 as a biological control agent against jointed cactus Opuntia aurantiaca Lindley, was investigated. Zimmermann et al. (l974) suggested that the apparent failure of this insect to control jointed cactus infestations is due to limited dispersal of the first instar nymphs (hereafter referred to as crawlers). Studies on crawler morphology have shown a clear sexual dimorphism in the pattern and development of filaments on the head, thorax and abdomen of male and female crawlers. This enabled differentiation between the sexes with respect to terminal velocities, behaviour and survival of crawlers which have shown that the crawlers, especially the females, are well adapted to dispersal. Long filaments on the head, thorax and abdomen of the female crawlers, that are restricted to dispersal in the crawler stage (as later instars are sessile) and a behaviour directed towards "take-off" enhance the potential for dispersal. The more sedentary males, with long filaments restricted to the abdomen, are able to disperse as winged adults. The principal factors influencing the timing of dispersal and number of crawlers blown from the host plant are wind and temperature; the latter determining the number of crawlers moving on the host plant. Dispersal is confined to the period between 06h00 and 20h00 and it was possible to correlate the pattern of crawler dispersal with wind patterns. The general equation of Taylor (1978) provided an adequate description of horizontal distribution of D.austrinus crawlers in all directions. Wind dispersal of the apterous crawlers is restricted by the low height of jointed cactus plants. Horizontal distribution is limited (generally less than 10 m) although a small proportion of crawlers carried vertically upwards by turbulence or convection currents are sufficiently hardy to survive long range displacement. It is suggested that the small size of the host plant will also reduce effective colonization as the canopy area provides a small target for the wind-blown crawlers. The limitation on dispersal due to the low height of the host plant suggested a system for artificially enhancing crawler dispersal from elevated towers in the field. Evaluation of this system confirmed that it would be practical to augment or introduce cochineal into jointed cactus infestations to enhance the biocontrol potential of this insect. This offers an alternative to chemical control, that has so far failed to control the spread of jointed cactus despite an intensive and expensive herbicide program
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- Date Issued: 1979
The nature and function of setting in Jane Austen's novels
- Authors: Kelly, Patricia Marguerite Wyndham
- Date: 1979
- Subjects: Austen, Jane, 1775-1817 , English fiction , Eighteenth century , Novel , Setting , Northanger Abbey , Pride and Prejudice , Mansfield Park , Emma
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2172 , http://hdl.handle.net/10962/d1001823
- Description: This study examines the settings in Jane Austen's six novels. Chapter I introduces the topic generally, and refers briefly to Jane Austen's aims and methods of creating her settings. Short accounts are given of the emphasis put on setting in the criticism of Jane Austen's work; of the chronology of the novels; and of the use made of this aspect of the novel in eighteenth-century predecessors. Chapter II deals with the treatment of place in Northanger Abbey, Sense and Sensibility, Pride and Prejudice, Mansfield Park and Emma. The consideration of five novels together makes it possible to generalize about aspects of place common to all , and to discuss particulars peculiar to individual novels without, I hope, excessive repetition. The chapter may be thought disproportionately long, but this aspect of setting is most prominent and important in the delineation of character. Chapter III discusses the handling of spatial detail and time in these five novels. Chapter IV offers a fuller analysis of what is the chief concern of this thesis, the nature and function of setting, in respect of the single novel Persuasion, and attempts to draw together into a coherent whole some of the points made in Chapters II and III. Persuasion separates conveniently from the other works, not only because it was written after them, but more importantly because in it there is a new development in Jane Austen's use of setting. Some critics, notably E.M. Forster and B.C. Southam, have found startlingly new qualities in the setting of Sanditon, and, certainly, the most striking feature of the fragment is the treatment of place. But Jane Austen left off writing Sanditon in March 1817 because of illness, and the twelve chapters make up too small and unfinished a piece to be considered in the same way as the other novels. The Watsons, too, except for some references to it in Chapter I, does not come within the scope of this dissertation. Another introductory point needs to be made briefly. Where it is necessary, the distinction between Jane Austen and the omniscient narrator is observed, but generally, partly because it is clear that Jane Austen's values are close to those of the narrator, and partly because it is convenient, traditional and sensible to do so, the name "Jane Austen" is used to refer both to the actual person and to the narrator of the novels.
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- Date Issued: 1979