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Statement on the State of Emergency

  • Authors: Henderson, Derek Scott
  • Date: 1986
  • Language: English
  • Type: Text
  • Identifier: vital:7552 , http://hdl.handle.net/10962/d1018429
  • Full Text:
  • Date Issued: 1986

Studies in carangid fishes no. 4: the identity of Scomber Sansun Forsskal, 1775

Taiwana hama yakanaka

Techniques in contemporary book illustration

  • Authors: Huggins, Linda Wreford
  • Date: 1986
  • Subjects: Illustration of books -- History -- 20th century
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: vital:2462 , http://hdl.handle.net/10962/d1008567
  • Description: Introduction: Although the hackneyed adage "one picture is worth a thousand words" defies proof and begs argument, the basic value of illustration in graphic communications is beyond dispute. Without attempting to put a relative value on illustration as compared with words, we can still be aware of the special effectiveness of images, in accomplishing communication goals. The roots of illustration go hack to prehistoric pictorial art of engraved or painted figures done on stone. The hand print can be interpreted as one of the first attempts at drawing. Prehistoric pictorial art depicted visually what could not be expressed by word or gestures some had religious significance, some the presence of myth, others plainly diadactic, showing daily life, social communication, the magic of the hunt, death, birth, group life and sexual symbolism. Little is known of the vast lapse of time between prehistoric art and the imagery that man devised in the service of developing civilisations at the dawn of history. With steadily increasing demands upon his skills, the artisan's mastery of the tools and materials progressed, so that by the beginning of recorded time he was in possession of the potential elements for printmaking. Yet the importance of communication, as we know it today, only developed centuries later with the motivating force of religion. The print could tell its story to those who could not read or write but could quickly grasp the meaning of a picture.
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  • Date Issued: 1986

Tempera painting: an investigation of the aesthetic and technical advantages of the medium

  • Authors: De Bliquy, Leon Paul
  • Date: 1986
  • Subjects: Painting -- Technique Tempura painting
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: vital:2469 , http://hdl.handle.net/10962/d1009443
  • Description: From Introduction: The balance between practical and theoretic components in the total submission bears relation to the title of this essay where aesthetic advantages are largely theoretical and where technical advantages refer mainly to the practical component. The historical significance of this structure is to be found in the earliest treatises on painting, Cenninni's treatment of painting as a purely practical matter is in accord with medieval tradition. His recipes are aligned according to the various individual techniques, tempera painting being the most significant to this essay. Practical recipes are interspersed with directions for the representation of various pictorial themes, and in the resultant conglomeration, the subdivisions are discernible only as basic premises. In contrast to him, the Renaissance authors beginning with Alberti make a significant innovation in that they divide their material into a theoretical and a practical part . The inter-relationship of practical and theoretical - aesthetic and technical aspects are un-avoidable when it comes down to realities. This is clearly illustrated in the notes of Leonardo da Vinci. Plans for the organization of the treatise are vaguely formulated .
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  • Date Issued: 1986

Thank you Jesus

Thank you Jesus, Amen

The "About to teach" course: an introductory orientation course for secondary teachers in training: an evaluation of student assessments

  • Authors: Coughlan, Niall Sean
  • Date: 1986
  • Subjects: Teachers -- Training of -- South Africa -- Eastern Cape High school teachers -- Training of -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1910 , http://hdl.handle.net/10962/d1007057
  • Description: This piece of research is an attempt to evaluate the assessments made by secondary teachers in training of an introductory orientation course offered during the first seven weeks of the 1984 H.D. E. course in the Department of Education of Rhodes University. This course, the About To Teach (ATT) course, was introduced in an attempt to obviate some of the perceived problems that students experience in the initial months of their H.D.E. year. The course was first offered in 1982 and in both 1982 and 1983 it was assessed by the students. The evaluation of the assessments offered in those two years provided much of the background for this in-depth look at student assessments of the 1984 ATT course. Briefly, the course attempts to offer the students a stimulating, meaningful, interesting and enjoyable learning experience which will help them to orientate; prepare them adequately for their first teaching practice and the reception later of the offerings of the core theory discipline of Philosophy, Sociology and Psychology. The course itself is a piece of action research and its underlying assumptions are essentially humanistic in nature. Its planners have attempted to bracket as many assumptions as possible and to espouse only those assumptions which are basically positive in nature. It does not attempt to prescribe or offer any dogma which can or must be assessed in any formal sense; it attempts to meet the students from whatever stages in their development they are at when they arrive to commence their H.D.E. year; and it does not attempt to compel the students in any way whatsoever. It is a course which must stand or fall on its own merits. Since the researcher is himself an involved participant in the process, he felt that the completion of a detailed questionnaire and interviews with a sample of the students would be the most economical and the best means of obtaining data for as objective an analysis as possible. To further obviate the possibility of researcher bias all the responses collected have been included in the appendices so that the reader may satisfy him/herself that the interpretations made and conclusions drawn are reasonable. Briefly, the chief conclusion of this researcher is that the overwhelming majority of the students perceived the course as offering them a meaningful learning experience. In addition, it can be argued that the course is, in effect, a guidance course in that it appears to be preparing students for experiences which they still have to come across . Most are generally critical of other courses offered during the H.D . E. year and many make an appeal for, or suggest, a much more integrated approach along the lines of the ATT course . There is a definite appeal for a coherent H.D.E. experience which is meaningful and 'peoplecentred'. By no stretch of the imagination can the findings of this particular piece of research be generalised to any other context since it is very definitely specific in both context and setting. However the researcher is quietly confident that his conclusions and recommendations make a great deal of sense within the specific context of this study.
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  • Date Issued: 1986

The adsorption of chelating reagents on oxide minerals

  • Authors: Bryson, Michael Andrew Walker
  • Date: 1986
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:20969 , http://hdl.handle.net/10962/5729
  • Description: This work constitutes a fundamental study of the interaction between chelating reagents and oxide minerals . The adsorption mechanisms have been elucidated for most of the systems generated by the oxides of copper(II) or iron(III) and chelating reagents octyl hydroxamate, N-phenylbenzohydroxamate, salicylaldoxime, 5-nitrosalicylaldoxime or 8-hydroxyquinoline. The results of the preliminary work on one of the systems, viz. the oxide-hydroxamate system, indicated that the classical type adsorption process, in which the reagent forms a uniform layer of chelate over the oxide surface was not applicable. Rather, the adsorption occurred via the formation of a discrete metal-chelate precipitate at the oxide surface. In order to better understand the associated with copper (II) oxide, adsorption process the oxide was recrystallized to produce a coarser material with a more uniform surface. This allowed the oxide surface to be viewed under the scanning electron microscope and also enabled the relative concentration of "surface" and "bulk" chelate to be assessed. A detailed investigation of the effect of the system variables; pH, conditioning period, concentration, temperature, surface area and dispersing reagent on the rate of precipitation of the copper chelate species of general form, Cu(chel)2' was made. In addition the chemical nature of the adsorbed species and the structural form of the precipitates were determined with the aid of infra-red spectroscopy and the scanning electron microscope. On the basis of these results a model has been formulated for the adsorption processes. In this model the adsorption dissolution, is considered to occur in stages: 1. Oxide dissolution, 2. metal complex formation, 3. Metal chelate precipitation at the oxide surface and 4. “bulk” chelate formation by post-precipitation processes. The precipitation process was examined in more detail by the study of the adsorption of chelate on copper metal. The results of this study showed that it was possible to relate the structural type of precipitate formed, ie. fibrous or platelike, to the degree of supersaturation of the metal complex in solution. Furthermore, it was found that the precipitate structure determined whether it remained attached to the surface or detached. Contact angle measurements of air bubbles on copper metal conditioned with chelate were related to the adsorption results in an attempt to isolate the optimum conditions for flotation of oxide minerals.
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  • Date Issued: 1986

The biology of the South African cliff swallow hirundo spilodera

  • Authors: Earlé, Roy Anthony
  • Date: 1986
  • Subjects: Hirundo pyrrhonota Birds -- Breeding -- South Africa Birds -- Behavior -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5631 , http://hdl.handle.net/10962/d1004927
  • Description: The general biology of the South African Cliff Swallow Hirundo spilodera was studied over a two year period in the central Orange Free State. This species is highly colonial, nesting mostly on man-made structures such as concrete road bridges. Adult birds were usually faithful to their breeding colony and very few individuals changed colonies. The Cliff Swallow had a surprisingly large vocal repertoire for a swallow and contact calls of the young were individually recognizable. Three species-specific ectoparasites parasitized the Cliff Swallow but none seemed to have a noticeable negative effect on the swallows. Breeding started earlier in larger colonies than in smaller ones and conspecific brood parasitism was a common feature in some colonies. Individual pairs made up to four breeding attempts per season. The findings of this study are compared with the available information on other members of the Hirundinidae and the advantages and costs of Cliff Swallow coloniality are discussed.
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  • Date Issued: 1986

The burgeoning family law and joint custody : inaugural lecture delivered at Rhodes University

The conservation status of some unique plant communities in the Eastern Cape

  • Authors: Everard, David Alexander
  • Date: 1986 , 2013-03-14
  • Subjects: Plant conservation -- South Africa -- Eastern Cape , Endangered species -- South Africa , Plant conservation -- South Africa -- Western Cape
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4250 , http://hdl.handle.net/10962/d1007497 , Plant conservation -- South Africa -- Eastern Cape , Endangered species -- South Africa , Plant conservation -- South Africa -- Western Cape
  • Description: In response to a growing concern over the rising rates of extinction of the world's plants and of habitat destruction, studies of Southern African threatened plants were initiated in the 1970's. These studies, which have largely concentrated on Western Cape flora, led to the publication of "Threatened Plants of Southern Africa" by Hall et al., 1980, which attempted to list as many threatened or possibly threatened species as possible. It was however marred by a lack of recent herbarium records and detailed studies from many parts of the region, the Eastern Cape being one of these. In order to extend these detailed studies to gain a clearer picture of the numbers of threatened species in the Eastern Cape and evaluate the conservation status of Eastern Cape vegetation this project was initiated. Initially lists of possibly threatened and endemic taxa of the Eastern Cape were compiled from various sources. These listed taxa were then checked against herbarium records, all available information being filled onto index cards for filing purposes. This paper-based filing system was then transferred into a computer-based data bank to facilitate the efficient storage and retrieval of information. Results from this data bank show that there are 662 variously threatened plant taxa in the Eastern Cape, many of which fall into temporary categories which need to be clarified by investigation in the field. Primarily based on the above results, a table ranking the various vegetation types into an order of priority for investigations about conservation requirement was developed.Subtropical Thicket was found to be the vegetation type in most need of investigation and so an extensive phytosociological survey was carried out in the Valley Bushveld which forms the major portion of Subtropical Thicket in the Eastern Cape. Twelve sites were sampled for floristic and environmental variables along a rainfall gradient of between 300 mm yr⁻¹ and 1 000 mm yr⁻¹ and along a longitudinal gradient from the Buffalo River in the east to the Gamtoos-Kromme complex in the west. Floristic data W(re analysed using multivariate techniques of classification and ordination. A classification by two-way species indicator analysis revealed the Valley Bushveld to consist of two orders of thicket, the Kaffrarian Succulent Thicket containing the two suborders, Inland Succulent Thicket and the Coastal Succulent Thicket and the Kaffrarian Thicket containing Coastal Kaffrarian Thicket and Inland Kaffrarian Thicket. Ordina tion by detrended correspondence analysis also grouped sites according to these vegetation categories in a sequence along one axis, to which the rainfall gradient could be related. Variables such as diversity indices, numbers of endemics, numbers of threatened taxa and structural features were also extracted from the data and these were correlated with environmental variables by multiple regression analysis. Species richness and the percent woody component w\!re positively correlated with rainfall while endemism and percent succulent component were strongly negatively correlated with rainfall. Most of the other relationships were explained by interrelationships with rainfall. Finally the sites were evaluated according to floristic criteria indicative of conservation value. The Coastal Succulent Thicket appeared to have the highest conservation value mainly owing to high endemism, while Inland Kaffrarian Thicket was also important as it supports a high number of species. The thickets with high conservation value are therefore the thickets of coastal areas in the western parts of the Eastern Cape which receive a low rainfall and the thickets which receive a rainfall in excess of 800 mm. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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  • Date Issued: 1986

The contribution of psychogenic factors limiting prolonged work performed at different relative intensities

  • Authors: Rorke, Stafford Conroy
  • Date: 1986
  • Subjects: Physical fitness -- Measurement , Physical fitness -- Psychological aspects , Work measurement , Work -- Psychological aspects
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:5103 , http://hdl.handle.net/10962/d1004772 , Physical fitness -- Measurement , Physical fitness -- Psychological aspects , Work measurement , Work -- Psychological aspects
  • Description: This study investigated the physiological and psychological limitations to prolonged work performed at different relative intensities, through the use of an eclectic integrative methodology. Ten young male caucasian subjects (mean V0₂ max. 60,0 ml.kg⁻¹.min⁻¹ ± 7,9) were randomly exposed to treadmill runs at each of four relative intensities, namely 55%, 65%, 75% and 85% of V0₂ maximum, with the instruction to run to the point of subjective discomfort at which they were no longer willing to continue. Physiological measures of oxygen consumption (V0₂), heart rate (HR), respiratory exchange ratio (R) , minute ventilation volume (Vi), breathing frequency (Vf), tidal volume (Vt) and psychological measures of Ratings of Perceived Exertion (RPE), Perceived Thermal Comfo·rt (PTC), Perceived Pain and Perceived Fatigue were recorded throughout the protocol. The relative intensity was held constant by slight decreases in treadmill speed as subjects fatigued, and through feedback from an on-line oxygen consumption computer-aided data acquisition system. Significant increases in both physiological and psychological measures occurred with increases in relative intensity (p<0,05). HR and Vf increased overtime (p<0,05) whilst Rand Vt decreased over time (p < 0,05) . All psychological ratings increased in intensity over time (p < 0,05). Mean endurance times to exhaustion were 243 minutes ± 70 at 55% relative intensity, 159 minutes ±37 at 65%, 96 minutes ±25 at 75 % and 23 minutes +- 8 at 85%, being within the range reported by earlier researchers . A regression equation for prediction of endurance time given a known relative intensity was developed for this sample: % V0₂ max. = 117,8 + (-10,6 x LN (time)) (where r = -0,91) Convergence rankings indicate the greater contribution of local factors in the overall gestalt of perceived exertion, pain and fatigue, with biomechanical limitations to prolonged work (running) strongly implicated . High inter correlations between psychological rating scales suggest the use of the scale considered most applicable to the task at hand and the psychological response measure required. A coefficient of multiple correlation of 0,94 established the close interrelationship amongst the physiological and psychological parameters measured. Pre- and post-test Fatigue Cluster Analysis questionnaires indicated that the most important clusters contributing toward the sensation of fatigue and subsequent decision to cease activity were Task Aversion and General Fatigue (r = 0,96), followed by Leg Fatigue and Thirst. Motivation, the task at hand and an attainable goal appear to be important considerations in prolonged work performance. Relative intensity appears a valid tool for use in prolonged work studies due to its high predictive capacity for endurance performance times (r=-0,91). It is concluded that workloads considerably below 55% of maximal aerobic capacity are indicated as acceptable workloads for an 8 hour working day.
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  • Date Issued: 1986

The contribution of William Gurnall (1616-1679) to the puritan concept of spiritual combat, with special emphasis on the role of faith

  • Authors: Van Zyl, Frederick William James
  • Date: 1986
  • Subjects: Gurnall, William, 1617-1679 , Puritans , Faith , Spiritual life -- Christianity -- History of doctrines
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:1223 , http://hdl.handle.net/10962/d1003916
  • Description: The Central figure in this thesis is William Gurnall M.A. (Cambridge) who lived from 1616 to 1679. He was the Rector of the Lavenham Parish church for 35 years, 1644/45-1679. He was one of the few Puritans who remained in the Established Church after the 1662 Act of Uniformity had been promulgated. His 'The Christian in Complete Armour' is one of the greatest practical-pastoral works to come from the pen of any Puritan. It is firmly based on Calvinistic theological principles. While holding common beliefs in many areas, Gurnall nevertheless was at odds with his fellow Puritans over certain crucial issues that directly affected his attitude to the Puritan revolution. His analysis of the person, being, nature, wiles, strategies and weapons of the Christian's great enemy and description of the Christian's resources such as the role of the shield of faith in its multiple uses, which constitute an important contribution to pastoral theory and practice are shown to arise out of Gurnall's theological stance, his own personal history, the history of East Anglia and of Lavenham in particular; his reflections on the 'Days of Great Confusions' and his deep concern for the breakdown in orderly society and the decline of genuine piety in the church. Basically we will concentrate on three issues: First. The real nature and locus of the Christian's spiritual warfare. Second. -- The means used for his investigation, namely, an examination of the person, power, methods and wiles of the Christian's great enemy and the vital role of the shield of faith. -- Third. His conclusions.
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  • Date Issued: 1986

The development and evaluation of a Nd:YAG laser incorporating an unstable resonator

  • Authors: De Kock, Trevor Neil
  • Date: 1986
  • Subjects: Nd-YAG lasers , Lasers -- Resonators , Laser beams
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5512 , http://hdl.handle.net/10962/d1008566 , Nd-YAG lasers , Lasers -- Resonators , Laser beams
  • Description: Introduction: For approximately the last eight years the Laser Section of the National Physical Research Laboratory (NPRL) has been interested in inter alia, pulsed solid-state lasers and in particular, Nd:YAG. Investigations of various resonator types were undertaken with a view to the improvement of the laser parameters such as output energy, pulse width, beam quality and sensitivity to mirror misalignment. In 1980 a Nd: YAG laser employing a rotating prism Q-switch was constructed (Preussler (1980)). It involves rotating one of the two cavity reflectors so that they are parallel for only a brief instant in time. Typically the prism must rotate at a speed of 20 000 r.p.m. to ensure a single pulse output. Such lasers suffer from the tendency to emit multiple pulses, they are very noisy and they require frequent maintenance because of the short lifetime of the bearings. A resonator employing conventional curved mirrors and an electro-optical Q-switch was constructed in 1980 (Robertson & Preussler (1982)). In 1981 an electro-optically Q-swi tched laser making use of a crossed Porro-prism resonator was investigated due to its relative insensitivity to misalignment of the reflectors compared with the conventional mirror resonator (Nortier (1981)). Improvements in terms of output power, beam divergence and beam quality can be achieved by making use of a so-called unstable resonator. Such a laser has been investigated and is reported on in this study. Chapter 2 provides some background into laser theory and operation while chapter 3 deals with the theory of the unstable resonator. Chapter 4 provides details of the experimental equipment and techniques used in the work and chapter 5 discusses the evaluation of the project and results obtained.
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  • Date Issued: 1986

The development of the meaning of non-ostensive words in a group of primary school children

  • Authors: Segal, Denise Erica
  • Date: 1986
  • Subjects: Connotation (Linguistics) , Children -- Language , Language acquisition
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:2372 , http://hdl.handle.net/10962/d1004917 , Connotation (Linguistics) , Children -- Language , Language acquisition
  • Description: The purpose of the present study was to investigate word meaning and its development in primary school children (6-12 years) . It was argued that the learning and development of the meanings of words such as pain cannot be primarily explained by means of ostensive definition. Furthermore, existing theories of word meaning which deal predominantly with substantive words fail to account for the learning of non-ostensive words. The pertinent psychological, linguistic and developmental psycholinguistic approaches to word meaning are reviewed briefly. The prototype approaches to word meaning are modified to apply to non-ostensive words . The focus is on conceptual meaning, that is, the way in which the senses of a word alter in different contexts. It is argued that the meaning of the word is its use in a diversity of linguistic contexts. The term "grammar" is applied in a unique way to encompass the meaning of the word (which stems in part from the words with which it co-occurs) as well as its selective use with other words in the language. Ninety-five metalinguistically-phrased tasks comprising short questions and picture-story sequences were analyzed in depth. The tasks were administered individually. A flexible interview afforded additional probing for each question. The analysis comprised percentage scores of responses at different age levels together with verbatim transcripts and qualitative descriptions: Uniformity, variation and developmental trends were found on different tasks for any particular word. Developmental trends were noted in children's understanding of particular words (for example, same), thereby extending the findings of previous researchers. There was evidence for a progression in children's ability to take into consideration that a word alters its sense according to the linguistic context in which it occurs (for example, same as it relates to chair versus dress versus pain). A comprehensive account of the words meaning could be established when a diversity of tasks was applied for each word. Children of different age levels employed different strategies in answering the questions posed. A model is proposed to describe the development of the meaning of non-ostensive words during the primary school years. It is suggested that psycholinguistic studies on word meaning be re-evaluated and that language and reading programmes incorporate the notion of "grammar". Application of this approach to the study of substantive word meaning in preschool children has important implications for theories of word meaning and for therapeutic intervention.
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  • Date Issued: 1986

The effect of the pesticide, endosulfan, on hepatic cytochrome P-450, liver and gill ultrastructure, and selected haematological parameters of Oreochromis Mossambicus (Peters, 1852) (Pisces : Cichlidae)

  • Authors: Quick, Arthur Joseph Rex
  • Date: 1986
  • Subjects: Pesticides , Mozambique tilapia , Cichlids
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5195 , http://hdl.handle.net/10962/d1001971 , Pesticides , Mozambique tilapia , Cichlids
  • Description: Two possible ways in which fish may acclimate to prolonged exposure· to sublethal levels of endosulfan were investigated: induction of the hepatic monooxygenase system and changes in haematology. These studies also involved an examination of the ultrastructure of liver and gill tissue. Endosulfan caused none of the characteristic phenobarbital-type inductive effects on the liver of Oreochromis mossambicus. There was no increase in cytochrome P-450 levels, microsomal protein or hepatosomatic index. The reasons for the lack of induction are discussed. The effect of endosulfan on the following haematological parameters was determined: haemoglobin, erythrocyte count, microhaematocrit, mean erythrocyte volume and mean erythrocyte haemoglobin concentration. The only effect was an increase in erythrocyte count. The value of changes in haematological parameters as indicators of pollutioninduced anemia in the field is discussed. No changes in gill ultrastructure were noted although electron micrographs of liver tissue showed lesions in hepatocytes. The diagnostic value of pollution-induced pathological changes on cell ultrastructure are discussed. Recommendations are made with regard to future large scale application of pesticides on or near large water bodies
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  • Date Issued: 1986

The effects of inbreeding and laboratory-rearing on a pyraustid moth, Mimorista pulchellalis Dyar (Lepidoptera: pyraustidae), imported for the biological control of jointed cactus in South Africa

  • Authors: Wright, Margaret Dorothy
  • Date: 1986
  • Subjects: Pyralidae -- South Africa , Cactus -- South Africa , Moths -- South Africa , Insect pests -- Biological control -- South Africa , Inbreeding
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5615 , http://hdl.handle.net/10962/d1003123 , Pyralidae -- South Africa , Cactus -- South Africa , Moths -- South Africa , Insect pests -- Biological control -- South Africa , Inbreeding
  • Description: Inbreeding was thought to be responsible for the loss in the second filial generation (F₂) of Amalafrida leithella Dyar, Cactoblastis mundelli Heinrich, Nanaia sp. Heinrich, Sigelgaita sp. Heinrich and Sigelgaita transilis Heinrich in the laboratory. This pre-empted the investigation of the effects of inbreeding on another cactophagous moth, Mimorista pulchellalis Dyar, an established biological control agent of jointed cactus in South Africa. Initially three populations were set up. A randomly-mating control (OUT 1) population, and a sibmating experimental (IN 1) population, consisted of laboratory-reared stock . A second experimental population (KR 1) comprised a small number of field-collected randomly-mating individuals which recreated the conditions under which the five abovementioned species were lost. The inbreeding depression of fifteen fitness components was assessed. The mean values of each component in each generation of treatments IN 1 and KR 1 were compared with those of OUT 1. In addition the mean values of IN 1 were regressed against the coefficients of inbreeding since inbreeding depression is linear with respect to the probability of two genes at any locus being homozygous through ancestry. The component egg viability was important because a reduction in OUT 1, IN 1 and KR 1 in the F₂ resulted from mated females producing no viable eggs. Duplicate treatments OUT 2, IN 2 and KR 2 were set up to confirm whether this was a general F₂ phenomenon. Assessment of the fitness components prevented a direct evaluation of the numbers of offspring produced. However a hypothetical estimate of population size and growth rate was made using the percentage survival calculated from life-table analysis. Although not statistically demonstrable in the component analysis, life table analysis indicated that egg viability suffered an inbreeding depression and affected population fitness. It was also evident that treatments OUT 1 and 2 were fitter than treatments IN 1 and 2 and KR 1 and 2 with respect to population fitness. Thus, inbreeding, resulting from sibmating and introduction of a small number of individuals to a laboratorYJ caused a decrease in numbers of offspring produced and population growth rate. This is important in relation to the demise of the cactophagous Lepidoptera and to future biological control programmes.
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  • Date Issued: 1986

The industrial development policy of Ciskei

  • Authors: Black, Philip A , McCartan, Patrick John , Clayton, P M
  • Date: 1986
  • Subjects: Ciskei Peoples Development Bank Manufactures -- South Africa -- Ciskei Industries -- South Africa -- Ciskei Ciskei (South Africa) -- Economic conditions Ciskei (South Africa) -- Economic policy
  • Language: English
  • Type: Book , Text
  • Identifier: http://hdl.handle.net/10962/2083 , vital:20254 , ISBN 0868101451
  • Description: There can be little doubt that manufacturing industry is one of the principal vehicles in the process of economic growth and development. The effect of growth in output and employment in this sector usually stimulates other sectors making for an expansion of output and employment opportunities across an entire economy. This paper is thus concerned with the development of manufacturing industry in Ciskei over the past decade as well as its prospects for growth in the foreseeable future. The paper itself falls into five sections. Section 1 provides a brief historical overview of political and constitutional developments and of industrial growth in the Border region and in Ciskei ever the past fifteen years. Section 2 outlines the current incentive package and indicates its impact on the industrial sector of Ciskei. Section 3 considers the recommendations of the Swart Commission while Section 4 discusses the role and activities of the Ciskei People's Development Bank. Section 5 presents the findings of a limited survey of manufacturing firms in Ciskei and leads onto the final section which offers some recommendations for industrial development in Ciskei specifically and in Region D as a whole. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
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  • Date Issued: 1986

The life and work of Robert Paul

  • Authors: Johnson, Christopher Charles Bonsall
  • Date: 1986
  • Subjects: Paul, Robert, 1906-1980 , Artists -- Zimbabwe
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: vital:2510 , http://hdl.handle.net/10962/d1018631
  • Description: [From Introduction] When Robert Paul died in 1980, his daughter Colette Wiles gave her father's art materials to an artist who was very close to both Robert and his wife in their last years - Dian Wright. The materials consisted of five different pigments and brushes cut into different shapes to suit the artist. This is remarkable when one considers his proficiency in a variety of media and his accurate portrayal in the far reaching studies he executed of the Zimbabwean landscape. Yet, it is characteristic of his resourcefulness that Paul could make 'something out of nothing'. Paul welcomed the opportunity of new landscape when he arrived in Rhodesia in 1927. Against the backdrop of a chosen isolation from the British Isles, Paul developed his own personal tracks in spite of any early influence through John Piper with the English Southern Landscape idioms of the 1920s. This was a fruitful isolation where the creation of his art retained influences but were manipulated according to his needs and unleashed with a proficiency sometimes equal to his peers, who later found fame under the term 'Neo-Romantics'. Paul remained an individual in Africa. My intention in this essay is three-fold; first, to illustrate the effects and influences of 'chosen' and 'enforced ' isolation on his work. Secondly, I wish to determine the extent of the influence that Piper and the Neo-Romantics had on Paul and to illustrate mostly with anecdotes his life and life-style. He was no mean character. His life-long obsessions with art, alcohol and women were played out with a flair and dry humour which few emulated in his era. Although a strictly academic approach can be applied to the assessment of his work, his life followed thoroughly unorthodox lines. As Bradshaw noted when he wrote the forward to the Catalogue of Paul's Retrospective in 1976, he (Paul) had no historical interests in the accepted sense of the word. , ABBYY FineReader 12
  • Full Text:
  • Date Issued: 1986
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