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An application of the natural area concept to East London apartment areas

- Brehmer, D A E

  • Authors: Brehmer, D A E
  • Date: 1975
  • Subjects: Natural areas -- South Africa -- East London , Apartment houses -- South Africa -- East London , Urban ecology (Sociology) -- South Africa -- East London
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:4872 , http://hdl.handle.net/10962/d1009694 , Natural areas -- South Africa -- East London , Apartment houses -- South Africa -- East London , Urban ecology (Sociology) -- South Africa -- East London
  • Description: The world is faced with a population explosion, and cities are becoming ever larger. The world population will grow from its present 3500 million to more than 7 000 million by the year 2 000. The majority of cities are thus faced with the problem of housing vast numbers of people living in single family dwellings forming low density urban sprawl. Conditions are no different in South Africa where the present white population of about four million is expected to grow to between six and seven million by the year 2000. The present housing requirement (1970-75) for Whites, based on low and high population projections, is 32 732 and 40 150 houses respectively. From 1995-2000 the figures will have risen to 42 742 and 65 580 respectively. At that rate sprawl here will reach alarming proportions unless it can be curtailed by higher density housing. As the population trend does not seem likely to be reversed the problem lies in how to provide housing for an escalating population but at the same time to reduce urban sprawl and provide satisfactory living conditions.
  • Full Text:
  • Date Issued: 1975

Remarks on formalized arithmetic and subsystems thereof

- Brink, C

  • Authors: Brink, C
  • Date: 1975
  • Subjects: Gödel, Kurt , Logic, Symbolic and mathematical , Semantics (Philosophy) , Arithmetic -- Foundations , Number theory
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5424 , http://hdl.handle.net/10962/d1009752 , Gödel, Kurt , Logic, Symbolic and mathematical , Semantics (Philosophy) , Arithmetic -- Foundations , Number theory
  • Description: In a famous paper of 1931, Gödel proved that any formalization of elementary Arithmetic is incomplete, in the sense that it contains statements which are neither provable nor disprovable. Some two years before this, Presburger proved that a mutilated system of Arithmetic, employing only addition but not multiplication, is complete. This essay is partly an exposition of a system such as Presburger's, and partly an attempt to gain insight into the source of the incompleteness of Arithmetic, by linking Presburger's result with Gödel's.
  • Full Text:
  • Date Issued: 1975

A dielectric and spectroscopic study of molecular association in solutions of alcohols

- Campbell, Colin

  • Authors: Campbell, Colin
  • Date: 1975
  • Subjects: Alcohols , Dielectrics , Spectrum analysis
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4454 , http://hdl.handle.net/10962/d1010424
  • Description: This study is concerned with the association characteristics of solutions of alcohols in some non-polar solvents. The permittivities at 2 MHz and 25°C for solutions of the straight chain octanols in cyclohexane, carbon tetrachloride and benzene have been examined over the entire solute concentration range, with particular attention -1 being paid to the range below 0.1 molℓ⁻¹ By applying the Kirkwood- Fröhlich equation to these data, the apparent dipole moments of the alcohols as a function of concentration have been evaluated. These concentration dependencies have been correlated with infrared absorption results on the same systems to provide information on the sizes and configurations of the proposed hydrogen bonded multimers. It is concluded that, at very low solute concentrations, the alcohol molecules exist as monomers; but with increasing concentration, two types of hydrogen bonded multimers are formed, the first (at low concentrations) being of high dipole moment and the second (at higher concentrations) being of low dipole moment. At high concentrations, the molecules associate to form a three-dimensional network. Attempts have been made to determine equilibrium parameters for molecular models which are consistent with the qualitative understanding of the association behaviour. These parameters were obtained by applying least-squares, curve-fitting techniques to the low concentration permittivity data. A similar investigation has been conducted on solutions of 2,3,4-trimethyl-3-pentanol in the same solvents. The steric hindrance around the hydroxyl group of this alcohol modifies the association behaviour so that a three-dimensional network does not form at high solute concentrations. Proton magnetic resonance chemical shifts for the hydroxyl proton of this alcohol in carbon tetrachloride solutions have been measured. Attempts have also been made to determine equilibrium parameters which describe formation of the hydrogen bonded multimers. To extend this study to include solutes other than octanols, similar experiments have been conducted on solutions of t-butanol in hexadecane, a system which has recently been investigated by other workers using different experimental techniques. The association behaviour of this system is qualitatively similar to that of the straight-chain octanols. The combination of permittivity and infrared measurements, although proving extremely powerful in interpreting the association characteristics of dilute alcohol solutions, is less adequate at high solute concentrations. Attention was therefore directed towards dielectric relaxation and viscosity studies to investigate concentrated solutions. The relaxation times at 20°C of the low frequency dispersion have been measured for solutions of 1-propanol, 1-butanol, 1-hexanol, 1-octanol and 1-decanol in cyclohexane using time domain reflectometry techniques. Similar measurements have also been made on solutions of 1-butanol and 1-octanol in carbon tetrachloride and in benzene. The concentration dependence of the viscosities of certain of these systems has also been examined in an independent study. The ratio of the dielectric relaxation time to the viscosity, the "reduced relaxation time", is qualitatively similar for each system studied. This similarity leads to an explanation of the molecular process responsible for the low frequency dispersion in terms of the proximity of the hydroxyl groups in concentrated alcohol solutions and the fraction of the groups which are not involved in hydrogen bonding.
  • Full Text:
  • Date Issued: 1975

Last Mtsitso

- Chopi men, Tracey, Andrew T N

Part of Mabandla

- Chopi men, Tracey, Andrew T N

Part of Chibhudhu

- Chopi men, Tracey, Andrew T N

Last Mtsitso Solo

- Composer not specified, Tracey, Andrew T N

The shaman and the artist: a personal enquiry

- Cull, Cleone

  • Authors: Cull, Cleone
  • Date: 1975
  • Subjects: Art, Shamanistic Shamans Artists
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: vital:2478 , http://hdl.handle.net/10962/d1010640
  • Description: This inquiry incorporates anthropological surveys on the life and character of the shaman, some writings of the American Plains Indians, and artist's, whose life and work reflects the power/life force so integral to the beliefs of these so called primitive cultures. Since the artist cannot be separated from his environment, the actions and reactions of society have also been explored. The method of inquiry has been to establish, first, the way of the shaman, and then the way of the artist. Although each artist, reflects only certain aspects of the enquiry, there is a strong affinity in the life and works of them all.
  • Full Text:
  • Date Issued: 1975

Die nywerheidsopleiding van vakleerlinge en hulle relatiewe invloed op die besetting van die arbeidsmark oor die afgelope tien jaar, met inbegrip van die toepaslike aspekte op die grensgebied

- De Beer, David Petrus

Art and conservation

- Dent, Hugh R

  • Authors: Dent, Hugh R
  • Date: 1975
  • Subjects: Nature conservation Environmentalism Nature (Aesthetics)
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: vital:2479 , http://hdl.handle.net/10962/d1011070
  • Description: There can be no doubt that population increase and environmental pollution are the world's biggest problems today. These pose serious threats to the quality of life and art. They can only be remedied by an efficient system of birth-control and sound compulsory education, in order to regain spiritual enlightenment. Intro. p. 1.
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  • Date Issued: 1975

Poetic situation in the poetry of John Crowe Ransom

- Driver, Dorothy

Interview with Gwanzura Gwenzi Gumboreshumba

- Gumboreshumba, Gwanzura Gwenzi, Tracey, Andrew T N

Economic dualism and labour re-allocation in South Africa, 1917-1970

- Hindson, Douglas Carlisle

Inspection of bride and attendants : Ngqokotho, 1975

- Ingle, Pauline Cornwell, 1915-1999

Teenage boys with axes : Ngqokotho, 1975

- Ingle, Pauline Cornwell, 1915-1999

Tsomo Dam, 1975

- Ingle, Pauline Cornwell, 1915-1999

Teenage boys, 1975

- Ingle, Pauline Cornwell, 1915-1999

Taireva

- John Hakurotwi Mude, Tracey, Andrew T N, Paul Berliner

Karigamombe

- John Hakurotwi Mude, Tracey, Andrew T N, Paul Berliner

Title not specified

- John Hakurotwi Mude, Tracey, Andrew T N, Paul Berliner

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