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Toast to honorary graduates 1979

  • Authors: Henderson, Derek Scott
  • Language: English
  • Type: Text
  • Identifier: vital:7398 , http://hdl.handle.net/10962/d1017287
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Toast to honorary graduates at luncheon, Graduation 1978

  • Authors: Henderson, Derek Scott
  • Language: English
  • Type: Text
  • Identifier: vital:7366 , http://hdl.handle.net/10962/d1017246
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Toast to honorary graduates at luncheon, graduation 1979

  • Authors: Henderson, Derek Scott
  • Language: English
  • Type: Text
  • Identifier: vital:7397 , http://hdl.handle.net/10962/d1017286
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Too hot in the tents for Africa

  • Authors: Olschewski, Sigrid
  • Subjects: McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Jazz
  • Language: German
  • Type: Article
  • Identifier: vital:13628 , http://hdl.handle.net/10962/d1012505 , McGregor, Chris--1936-1990 , Brotherhood of Breath (Musical group) , Jazz
  • Description: Photocopied article from the German newspaper Metropol-Gesellschaft about the music Open OHR Festival in Mainz, Germany, where Chris McGregor’s Brotherhood of Breath is playing. There is a picture untitled "Black and White wedding" with this article.
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Tool wear monitoring in end milling of mould steel using acoustic emission

  • Authors: Olufayo, Oluwole Ayodeji
  • Subjects: Acoustic emission testing , Tool-steel
  • Language: English
  • Type: Thesis , Masters , MEngineering
  • Identifier: vital:9651 , http://hdl.handle.net/10948/d1014688
  • Description: Today’s production industry is faced with the challenge of maximising its resources and productivity. Tool condition monitoring (TCM) is an important diagnostic tool and if integrated in manufacturing, machining efficiency will increase as a result of reducing downtime resulting from tool failures by intensive wear. The research work presented in the study highlights the principles in tool condition monitoring and identifies acoustic emission (AE) as a reliable sensing technique for the detection of wear conditions. It reviews the importance of acoustic emission as an efficient technique and proposes a TCM model for the prediction of tool wear. The study presents a TCM framework to monitor an end-milling operation of H13 tool steel at different cutting speeds and feed rates. For this, three industrial acoustic sensors were positioned on the workpiece. The framework identifies a feature selection, extraction and conditioning process and classifies AE signals using an artificial neural network algorithm to create an autonomous system. It concludes by recognizing the mean and rms features as viable features in the identification of tool state and observes that chip coloration provides direct correlation to the temperature of machining as well as tool condition. This proposed model is aimed at creating a timing schedule for tool change in industries. This model ultimately links the rate of wear formation to characteristic AE features.
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Top accolade for Rhodes scientist

  • Authors: Mkentane, Luyolo , Holmes, Mike
  • Language: English
  • Type: Article
  • Identifier: vital:7214 , http://hdl.handle.net/10962/d1006425
  • Description: A RHODES University research professor who is championing ground-breaking research into a new cancer diagnosIs and treatment methodology has received a prestigious award after being nominated one of 10 Women of Excellence in South Africa.
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Top jazz group visiting city

Top UN award for leading scientist

  • Authors: National Research Foundation (NRF)
  • Language: English
  • Type: Article
  • Identifier: vital:7193 , http://hdl.handle.net/10962/d1006357
  • Description: Professor Tebello Nyokong holds the DST/NRF funded chair in Medicinal Chemistry and Nanotechnology at Rhodes University
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Toscana, the beautiful country where the jazz sounds

Total Music Meeting '80

Traveling without passport

  • Authors: Nighthawk
  • Language: French
  • Type: Article
  • Identifier: vital:13624 , http://hdl.handle.net/10962/d1012499
  • Description: Photocopied article in French about 2 Piano solo performances of Chris McGregor at la Salle Bleue in Toulouse, France.
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Tribological characteristics of polymers under high force small oscillating angular contact

  • Authors: Bradfield, Jarad Wade
  • Subjects: Tribology , Polymers.
  • Language: English
  • Type: Thesis , Masters , MTech (Mechanical Engineering)
  • Identifier: vital:9637 , http://hdl.handle.net/10948/d1020598
  • Description: This study was intended to establish which polymer material is best suited as the material for bushes used in high force small oscillating angular contact applications as typically found in a large sugar mill coupling. A Tribometer as well as a designed and manufactured Bearing Testing Machine, which simulates and accelerates the wear caused in the intended application, was used to determine the wear rates and coefficients of friction for seven polymer materials. Materials were selected for their superior mechanical and thermal properties. The Tribometer was fitted with a linear reciprocating rig, so as to simulate the small oscillating movement prevalent in the intended application. Each Tribometer test ran for a duration of two hours with a frequency of 33.1 Herts and a normal loading of 40N. Bearing Testing Machine tests were done under similar constraints but with 30kN loading present on the surface of a bushes inner race. These tests had a longer duration of 24 or 48 hours or until intense wearing occurred. Initially both testing methods will be analysed independently of each other in order to try and identify a relationship between the wear rate and coefficient of friction for the different polymers. The different testing methods’ results will be compared to each other in order to establish if a correlation between the materials tested could be found.
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Tribute to Chris McGregor with South African Friends and Christine Wodrascka Trio

Tribute to Chris McGregor, the apostle of Liberty, in Saint-Pastour

  • Authors: Petit, Claude
  • Subjects: McGregor, Chris--1936-1990 , Jazz , Jazz musicians
  • Language: French
  • Identifier: vital:13506 , http://hdl.handle.net/10962/d1005769 , McGregor, Chris--1936-1990 , Jazz , Jazz musicians
  • Description: Photocopied article from the French newspaper Sud-Ouest about Chris McGregor's funerals. A photo of the funerals at the church is also with the article.
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Tribute to jazz pianist Chris McGregor

  • Authors: Seale, Tyrone
  • Language: English
  • Type: Article
  • Identifier: vital:13648 , http://hdl.handle.net/10962/d1012557
  • Description: Photocopied tribute to jazz pianist Chris McGregor from the newspaper Argus. A photo untitled "Chris McGregor, who died in self-exile in France last year" is also with the article.
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Troubadours' adventures

  • Authors: Nighthawk
  • Language: French
  • Type: Article
  • Identifier: vital:13625 , http://hdl.handle.net/10962/d1012501
  • Description: Photocopied article in French about a meeting at a restaurant between Chris McGregor and Barry Altschul with his Trio. The Trio is touring Europe. There is a picture of Barry Altschul with this article.
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Tuning the physico-electrochemical properties of novel cobalt (II) octa[(3,5-biscarboxylate)-phenoxy] phthalocyanine complex using phenylamine-functionalised SWCNTs

  • Authors: Agboola, Bolade Oyeyinka , Ozoemena, Kenneth I. , Nyokong, Tebello , Fukuda, Takamitsu , Kobayashi, Nagao
  • Language: English
  • Type: Article
  • Identifier: vital:7238 , http://hdl.handle.net/10962/d1019689
  • Description: The integration of phenylamine-functionalised SWCNTs (SWCNT-phenylamine) with a novel cobalt (II) octa[(3,5-biscarboxylate)-phenoxy] phthalocyanine (CoOBPPc) complex has been described. The physical and electrochemical properties of the CoOBPPc-SWCNT-phenylamine hybrid were evaluated using spectroscopy (IR and UV–vis), field emission scanning electron microscopy and electrochemistry (cyclic voltammetry and electrochemical impedance spectroscopy). Integration of SWCNT-phenylamine resulted in the physical transformation of the CoOBCPPc from the usually bluish colour of cobalt phthalocyanine complexes to a beautiful bright green colour. In addition, the heterogeneous electron transfer kinetics and electrocatalytic properties of the CoOBCPPc were greatly enhanced following the attachment of the SWCNT-phenylamine. The potential electrocatalytic application of the hybrid was tested using β-nicotinamide adenine dinucleotide (NADH) as a model biological analyte. Interestingly, the onset oxidation potential of this analyte was significantly reduced (300 mV) by this hybrid compared to the bare electrode. , Original publication is available at http://dx.doi.org/doi:10.1016/j.carbon.2009.10.023
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Ultrafast Photodynamics of the Indoline Dye D149 Adsorbed to Porous ZnO in Dye-Sensitized Solar Cells

  • Authors: Rohwer, Egmont , Richter, Christoph , Heming, Nadine , Strauch, Kerstin , Litwinski, Christian , Nyokong, Tebello , Schlettwein, Derck , Schwoerer, Heinrich
  • Language: English
  • Type: Article
  • Identifier: vital:7326 , http://hdl.handle.net/10962/d1020576
  • Description: We investigate the ultrafast dynamics of the photoinduced electron transfer between surface-adsorbed indoline D149 dye and porous ZnO as used in the working electrodes of dye-sensitized solar cells. Transient absorption spectroscopy was conducted on the dye in solution, on solid state samples and for the latter in contact to a I−/I3− redox electrolyte typical for dye-sensitized solar cells to elucidate the effect of each component in the observed dynamics. D149 in a solution of 1:1 acetonitrile and tert-butyl alcohol shows excited-state lifetimes of 300±50 ps. This signature is severely quenched when D149 is adsorbed to ZnO, with the fastest component of the decay trace measured at 150±20 fs due to the charge-transfer mechanism. Absorption bands of the oxidized dye molecule were investigated to determine regeneration times which are in excess of 1 ns. The addition of the redox electrolyte to the system results in faster regeneration times, of the order of 1 ns. , Original publication is available at http://dx.doi.org/10.1002/cphc.201200715
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Unemployment Insurance Fund

  • Authors: UIF
  • Subjects: UIF
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/160982 , vital:40574
  • Description: U.I.F. (Unemployment Insurance Fund) is an insurance scheme. The scheme pays money to a worker who has contributed to the fund and who is temporarily unemployed. Money paid into the Fund is paid out to workers who have become unemployed and under certain other circumstances that we will set out below.
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Unsymmetrically Substituted Nickel Triazatetra-Benzcorrole and Phthalocynanine Complexes: Conjugation to Quantum Dots and Applications as Fluorescent “Turn ON” Sensors

  • Authors: Adegoke, Oluwasesan , Nyokong, Tebello
  • Language: English
  • Type: Article
  • Identifier: vital:7311 , http://hdl.handle.net/10962/d1020403
  • Description: We report on the design and application of fluorescent nanoprobes based on the covalent linking of L-glutathione-capped CdSe@ZnS quantum dots (QDs) to newly synthesized unsymmetrically substituted nickel mercaptosuccinic acid triazatetra-benzcorrole (3) and phthalocyanine (4) complexes. Fluorescence quenching of the QDs occurred on conjugation to complexes 3 or 4. The nanoprobes were selectively screened in the presence of different cations and Hg2+ showed excellent affinity in “turning ON” the fluorescence of the nanoprobes. Experimental results showed that the sensitivity of QDs-4 towards Hg2+ was much higher than that of QDs-3 nanoprobe. The mechanism of reaction has been elucidated based on the ability of Hg2+ to coordinate with the sulphur atom of the Ni complex ring and apparently “turn ON” the fluorescence of the linked QDs. , Original publication is available at http://dx.doi.org/10.1007/s10895-013-1317-4
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