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The Educational Journal

A Declaration to the People of South Africa

Build NUMSA: NUMSA Shopstewards 1996-1999: a guide for NUMSA shop stewards

- National Union of Metalworkers of South Africa

  • Authors: National Union of Metalworkers of South Africa
  • Date: 199u
  • Subjects: Uncatalogued
  • Language: English
  • Type: book , text
  • Identifier: http://hdl.handle.net/10962/68688 , vital:29305
  • Description: The manual serves as a guide for shopstewards of the National Union of Metalworkers of South Africa (NUMSA), in enabling shopstewards to support the union members. Included is the duties of a shopsteward, information pertaining to NUMSA, as well as an outline of the activities of NUMSA.
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Rhodes University Graduation Ceremony 1962

- Rhodes University

  • Authors: Rhodes University
  • Date: 1962
  • Language: English
  • Type: text
  • Identifier: vital:8096 , http://hdl.handle.net/10962/d1004417
  • Description: Rhodes University Graduation Ceremonies on Saturday 31 March 1962 at 11 a.m. in the University Great Hall [and] Saturday 14 April 1962 at 11 a.m. in the University Great Hall.
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Rhodes University Graduation Ceremony 1961

- Rhodes University

  • Authors: Rhodes University
  • Date: 1961
  • Language: English
  • Type: text
  • Identifier: vital:8095 , http://hdl.handle.net/10962/d1004410
  • Description: Rhodes University Graduation Ceremonies in the University Great Hall on Saturday , 8th April, 1961, at 11 a.m. [and] Saturday , 22nd April, 1961, at 11 a.m.
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The Educational Journal

Molecular Networking Reveals Two Distinct Chemotypes in Pyrroloiminoquinone-Producing Tsitsikamma favus Sponges

- Kalinski, Jarmo-Charles, Waterworth, Samantha C, Siwe Noundou, Xavier Siwe, Jiwaji, Meesbah, Parker-Nance, Shirley, Krause, Rui W M, McPhail, Kerry, Dorrington, Rosemary A

  • Authors: Kalinski, Jarmo-Charles , Waterworth, Samantha C , Siwe Noundou, Xavier Siwe , Jiwaji, Meesbah , Parker-Nance, Shirley , Krause, Rui W M , McPhail, Kerry , Dorrington, Rosemary A
  • Date: 2019
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/128179 , vital:36084 , https://doi.org/10.3390/md17010060
  • Description: The temperate marine sponge, Tsitsikamma favus, produces pyrroloiminoquinone alkaloids with potential as anticancer drug leads. We profiled the secondary metabolite reservoir of T. favus sponges using HR-ESI-LC-MS/MS-based molecular networking analysis followed by preparative purification efforts to map the diversity of new and known pyrroloiminoquinones and related compounds in extracts of seven specimens. Molecular taxonomic identification confirmed all sponges as T. favus and five specimens (chemotype I) were found to produce mainly discorhabdins and tsitsikammamines. Remarkably, however, two specimens (chemotype II) exhibited distinct morphological and chemical characteristics: the absence of discorhabdins, only trace levels of tsitsikammamines and, instead, an abundance of unbranched and halogenated makaluvamines. Targeted chromatographic isolation provided the new makaluvamine Q, the known makaluvamines A and I, tsitsikammamine B, 14-bromo-7,8-dehydro-3-dihydro-discorhabdin C, and the related pyrrolo-ortho-quinones makaluvamine O and makaluvone. Purified compounds displayed different activity profiles in assays for topoisomerase I inhibition, DNA intercalation and antimetabolic activity against human cell lines. This is the first report of makaluvamines from a Tsitsikamma sponge species, and the first description of distinct chemotypes within a species of the Latrunculiidae family. This study sheds new light on the putative pyrroloiminoquinone biosynthetic pathway of latrunculid sponges
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The Educational Journal

The Educational Journal

The Educational Journal

The Educational Journal

New Unity Movement Bulletin

New Unity Movement Bulletin

The Educational Journal

Near-real time foF2 predictions using neural networks

- Oyeyemi, E O, McKinnell, L-A, Poole, A W V

  • Authors: Oyeyemi, E O , McKinnell, L-A , Poole, A W V
  • Date: 2006
  • Language: English
  • Type: text , Article
  • Identifier: vital:6804 , http://hdl.handle.net/10962/d1004167
  • Description: This paper describes the use of the neural network (NN) technique for the development of a near-real time global foF2 (NRTNN) empirical model. The data used are hourly daily values of foF2 from 26 worldwide ionospheric stations (based on availability) during the period 1976–1986 for training the NN and between 1977 and 1989 for verifying the prediction accuracy. The training data set includes all periods of quiet and disturbed geomagnetic conditions. Two categories of input parameters were used as inputs to the NN. The first category consists of geophysical parameters that are temporally or spatially related to the training stations. The second category, which is related to the foF2 itself, consists of three recent past observations of foF2 (i.e. real-time foF2 (F0), 2 h (F−2) and 1 h (F−1) prior to F0) from four control stations (i.e. Boulder (40.0°N, 254.7°E), Grahamstown (33.3°S, 26.5°E), Dourbes (50.1°N, 4.6°E) and Port Stanley (51.7°S, 302.2°E). The performance of the NRTNN was verified under both geomagnetically quiet and disturbed conditions with observed data from a few verification stations. A comparison of the root mean square error (RMSE) differences between measured values and the NRTNN predictions with our earlier standard foF2 NN empirical model is also illustrated. The results reveal that NRTNN will predict foF2 in near-real time with about 1 MHz RMSE difference anywhere on the globe, provided real time data is available at the four control stations. From the results it is also evident that in addition to the geophysical information from any geographical location, recent past observations of foF2 from these control stations could be used as inputs to a NN for near-real time foF2 predictions. Results also reveal that there is a temporal correlation between measured foF2 values at different locations.
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Rhodes University Graduation Ceremony 1973

- Rhodes University

  • Authors: Rhodes University
  • Date: 1973
  • Language: English
  • Type: text
  • Identifier: vital:8107 , http://hdl.handle.net/10962/d1004562
  • Description: Rhodes University Graduation Ceremonies on Friday 13th April 1973 at 8 p.m. [and] on Saturday 14th April 1973 at 10:30 a.m. in the University Great Hall.
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The Educational Journal

  • Date: 2000-08
  • Subjects: Education – South Africa , South Africa – Economic conditions , South Africa – Social conditions
  • Language: English
  • Type: text , Article
  • Identifier: http://hdl.handle.net/10948/38388 , vital:34740
  • Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa. From the 2000s, the journal was published by the National Union of Public Service and Allied Workers (NUPSAW), a trade union formed in August 1998 from the amalgamation of militant and moderate trade unions and also operated in the education sphere.
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LibQUAL+™ at Rhodes University Library: an overview of the first South African implementation

- Moon, A E

  • Authors: Moon, A E
  • Date: 2006
  • Language: English
  • Type: Text
  • Identifier: vital:6979 , http://hdl.handle.net/10962/d1012407
  • Description: When Rhodes University Library closed its LibQUAL+™ survey on 29 August 2005, it became the first of seven university libraries in South Africa to complete this Web-based survey, which measures library users’ perceptions of service quality and identifies gaps between desired, perceived, and minimum expectations of service. This paper focuses on the Rhodes Library’s implementation of the 2005 LibQUAL+™ survey. Results are looked at within the broader context of aggregate scores and score norms from the South African cohort. The library’s first efforts to address areas where perceptions of service quality differed from users’ expectations are described and plans for future efforts are indicated. The paper also details some lessons learnt by other LibQUAL+™ participants, as documented in published case studies.
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“[A] ll just surface and veneer”: the challenge of seeing and reading in Ishtiyaq Shukri’s I See You

- Dass, Minesh

  • Authors: Dass, Minesh
  • Date: 2017
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/142577 , vital:38092 , DOI: 10.1080/17533171.2017.1312749
  • Description: This article considers challenges posed to reading practices and hermeneutics by Ishtiyaq Shukri’s I See You. The content of the novel is at times didactic, and surface reading might seem an appropriate means of analysis, yet the form is experimental: it includes radio reports, characters’ reflections and journalistic work. The connection between these “documents” is not readily apparent, thus one is obliged to study the gaps between them to make sense of the text. Symptomatic reading might seem apposite, but the protagonist’s photographic work reveals the limits of this form of reading, too. I argue that Shukri’s text demands a process that interweaves symptomatic and surface reading in complex ways that require the reader to assess the ideological position from which s/he reads. The novel therefore draws attention to the ways in which reading, like seeing, is a political act.
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Nature and source of suspended particulate matter and detritus along an austral temperate river–estuary continuum, assessed using stable isotope analysis

- Dalu, Tatenda, Richoux, Nicole Bertine, Froneman, Pierre William

  • Authors: Dalu, Tatenda , Richoux, Nicole Bertine , Froneman, Pierre William
  • Date: 2016
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/68012 , vital:29181 , https://doi.org/10.1007/s10750-015-2480-1
  • Description: Publisher version , Ecologists are interested in the factors that control, and the variability in, the contributions of different sources to mixed organic materials travelling through lotic systems. We hypothesized that the source matter fuelling mixed organic pools in a river–estuary continuum varies over space and time. Samples of the mixed organic pools were collected along a small temperate river (Kowie River) in southern Africa during early and late spring, summer and winter. The C:N ratios of suspended particulate matter (SPM) collected during summer and winter indicated that the lower reaches of the system had similar organic matter contributions. Stable isotope analysis in R revealed that aquatic macrophytes were significant contributors to SPM in the upper reaches. Bulk detritus had large allochthonous matter components in the lower reaches, and contributions of aquatic macrophytes and benthic algae were high (>50%) in the upper to middle reaches. The evaluation of organic matter contributions to SPM and detritus along the river–estuary continuum provided a baseline assessment of the nature and sources of potential food for consumers inhabiting different locations during different seasons. Incorporating SPM and detritus spatio-temporal variations in food web studies will improve our understanding of carbon flow in aquatic systems.
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