Showing items 441 - 460 of 506

Your selections:

Asterisk: A converged tdm and packet-based communications system

  • Authors: Penton, J , Terzoli, Alfredo
  • Date: 2003
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/427547 , vital:72446 , https://citeseerx.ist.psu.edu/document?repid=rep1andtype=pdfanddoi=70080710a6f96bf1c071be14a8b21c17ff8cbc4d
  • Description: Converged TDM and packet-based communications systems are a popular topic in computer science and telecommunications arenas. This paper discusses a system called Asterisk that is an open source hybrid TDM and packet voice platform. Asterisk is designed to interface any piece of telephony hardware or software with any telephony application. This makes Asterisk a powerful component that can be easily used in NGN softswitches, conferencing servers and Private Branch eXchanges (PBX). Asterisk has been deployed in the Rhodes University Computer Science Department’s VoIP environment and integrated with our existing H. 323 and SIP packet-based networks. This paper discusses the de-ployment of Asterisk, its interworking with our H. 323 and SIP networks and the functionality it offers in terms of a converged TDM and packet-based communications system.
  • Full Text:
  • Date Issued: 2003

Capital E for events: ways that work: useful solutions

  • Authors: Garman, Anthea
  • Date: 2003
  • Language: English
  • Type: text , article
  • Identifier: vital:38359 , http://hdl.handle.net/10520/EJC146297
  • Description: You would think being located in a small town in one of the most impoverished provinces in South Africa would be a drawback for making media. But a small town is a reachable, convenient laboratory environment for student journalists - and never more so than when the National Arts Festival comes to Grahamstown during the winter vacation.
  • Full Text:
  • Date Issued: 2003

Interrogate the information society:

  • Authors: Berger, Guy
  • Date: 2003
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/159181 , vital:40275 , https://hdl.handle.net/10520/EJC146276
  • Description: If there is one thing journalists should know about the "Information Society", it's this: never use the phrase as if its meaning speaks for itself. This is one of the most slippery and contentious phrases yet to grace contemporary discourse. For a start, why "Information Society" and not "Knowledge Society"? And why "society" and not "economy"? This is not academic semantics. There are wholly different meanings at stake with different implications for journalists, politicians, policy makers and many more.
  • Full Text:
  • Date Issued: 2003

Pharmaceutical Pictograms: Part 1: Communicating Medicine Information to the Low-literate Patient

  • Authors: Dowse, Roslind , Ehlers, Martina S
  • Date: 2003
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/157026 , vital:40080
  • Description: To assess the influence of formal education on the interpretation of pharmaceutical pictograms.
  • Full Text:
  • Date Issued: 2003

Pipes, poles and people:

  • Authors: Kyazze, Simwogerere
  • Date: 2003
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/159153 , vital:40273 , https://hdl.handle.net/10520/EJC146268
  • Description: Tina James, a South African ICT consultant, tells the story of Minnie Barendse Kruger who had been struggling to get a Khoisan Cultural Village going in the Eastern Cape. Kruger set up a restaurant where traditional food is prepared, and the Barendse Griquas Trust stepped in and helped set up a multi-purpose Community Centre.
  • Full Text:
  • Date Issued: 2003

The OSS promise:

  • Authors: Kyazze, Simwogerere
  • Date: 2003
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/159138 , vital:40271 , https://hdl.handle.net/10520/EJC146251
  • Description: For Africa the attraction of open source software (OSS), is obvious. But for once, Internet intellectuals are not simply sounding off to annoy the rich north.
  • Full Text:
  • Date Issued: 2003

The prevalence of use and value of wild edible herbs in South Africa

  • Authors: Shackleton, Charlie M
  • Date: 2003
  • Language: English
  • Type: Article
  • Identifier: vital:6652 , http://hdl.handle.net/10962/d1007063
  • Description: The prevalence of use and commercial value of wild edible herbs in South Africa is examined from four recent quantitative studies at eight different sites. The use of wild edible herbs was widespread in rural communities, with over 90% of households using them in all but one sample site. Mean frequency of use in season was generally between two and five times per week, with a mean of four times across all sites. But many households consume them daily. Use in winter was less than in summer. The mass of wild edible herbs consumed ranged from 12 kg to over 130 kg per household per year. Local (farm-gate) prices ranged from R2.65 to R72 per kilogram, but were generally between R30 and R40 per kg. Direct-use value to consuming households ranged from R85 to almost R5000 across the eight sites, with a mean of R1020 per user household per year. Although harvesting of wild herbs takes time, the high gross direct-use value represents a considerable saving on having to purchase commercial alternatives. Key species differ from place to place both in availability and use, and include both indigenous and exotic species. Commonly used genera include Amaranthus, Bidens, Chenopodium, Cleome, Corchorus, and Momordica. The use, value and trade in wild edible herbs currently receives no recognition in land and agrarian reform policies. It is imperative that this be addressed, and the relationships between rural livelihoods, use of wild edible herbs, food security, and land and resource tenure be clarified, and debated within the policy forums around different models for, and delivery of, agrarian reform and rural development.
  • Full Text:
  • Date Issued: 2003

The stories in the details:

  • Authors: Kyazze, Simwogerere
  • Date: 2003
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/159177 , vital:40274 , https://hdl.handle.net/10520/EJC146272
  • Description: A famous journalism adage is that "the story is in the details". For the world Information Society, those details might be in the mind-blowing technological advances in recent years and the dizzying alternative news sources; and in the increased novelty in story telling.
  • Full Text:
  • Date Issued: 2003

Group displays in pale-winged starlings

  • Authors: Hulley, Patrick E , Craig, Adrian J F K , Walter, Grenville H
  • Date: 2002
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/465380 , vital:76599 , https://doi.org/10.1080/15627020.2002.11657161
  • Description: Cliff-nesting pale-winged starlings (Onychognathus nabouroup) gather on the cliff tops to perform Group Displays which include both aggressive and courtship elements: Hopping, Wing Stretching, Wing Drooping, Wing Flicking, Staring, Head Forward Threat and Butterfly Fluttering. These displays occur throughout the year, most frequently in the late afternoon. We suggest that this behaviour may be important in pair formation, and in establishing dominance relationships between birds breeding at the same site.
  • Full Text:
  • Date Issued: 2002

Parasitic Cape bees in the northern regions of South Africa: source of the founder population

  • Authors: Neumann, Peter , Radloff, Sarah E , Hepburn, H Randall
  • Date: 2002
  • Language: English
  • Type: text , Article
  • Identifier: vital:6908 , http://hdl.handle.net/10962/d1011861
  • Description: Multivariate discriminant analyses of nine standard morphometric characters of honeybee workers were used to track the origin of a social parasitic pseudo-clone of thelytokous laying workers that have invaded colonies of Apis mellifera scutellata in South Africa. Twenty social parasitic workers were sampled from both of two infested A. m. scutellata colonies at two distant apiaries (Graskop and Heilbronn, about 390 km apart) and compared with data obtained from 80 colonies in four different geographical zones (zone I: thelytokous A. m. capensis morphocluster; zone II: natural thelytokous hybrids between A. m. capensis and A. m. scutellata; zone III: thelytokous A. m. scutellata morphocluster; zone IV: an arrhenotokous A. m. scutellata morphocluster). Thelytokous laying workers occur naturally in zones I-III. Highly significant morphometric differences were found among the bees in the four zones. The data support the conclusion that the social parasitic workers belong to the thelytokous A. m. capensis morphocluster. It is most likely that the social parasitic workers originated from the heart of the Cape bee's distribution range in the Western Cape region in zone I. Morphometric analysis makes it feasible to restrict the possible origin of the social parasitic workers from the natural distribution range of thelytoky (approximately 240 000 km2) down to about 12 000 km2, which represents a resolution capacity of about 95%.
  • Full Text:
  • Date Issued: 2002

Physical and biological variability in the Antarctic Polar Frontal Zone: report on research cruise 103 of the MV SA Agulhas

Reporting indigenous knowledge: the choices they deserve the local is the global

  • Authors: Boshoff, Priscilla A
  • Date: 2002
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/71176 , vital:29804 , http://doi:10.1006/jmbi.1995.0238
  • Description: A few days ago, an interesting article dealing with community development and education came close to being published in a national newspaper. But the editor tossed it back at the surprised journalist, and told him to write it again. Here are some excerpts: Researchers here have recently been facilitating local people to rediscover traditional practices that have been lost through the processes of colonisation and changes in lifestyles. “We are very excited about the ways in which things are being discovered,” said Samuel Mann, research facilitator at the project. “People are beginning to reclaim some of the ways of knowing that still have meaning and relevance to modern everyday life. People are rediscovering the importance of Indigenous Knowledge.” Mba Ngcobo, one of the participants in the project, showed how he and other members of his community had built a grain pit using old traditional knowledge. “It works really well,” he said, “it is amazing how these old ways really work. Our ancestors had marvellous ways of doing things. We can really appreciate the skills that are slowly being lost to us.” Mann explained how the traditional pit storage method produced carbon dioxide that keeps the grain fresh and insect-free for months. “Carbon dioxide storage is now the preferred way of many milling and storage companies to keep grain. It keeps grain fresh without having to resort to insecticides.”
  • Full Text:
  • Date Issued: 2002

A dinocephalian therapsid fauna on the Ecca–Beaufort contact in Eastern Cape Province, South Africa

  • Authors: Modesto, S P , Rubidge, B S , de Klerk, William J , Welman, J
  • Date: 2001
  • Language: English
  • Type: text , Article
  • Identifier: vital:6999 , http://hdl.handle.net/10962/d1008355
  • Description: Systematic exploration of outcrops of the lowermost Beaufort Group for fossils of the oldest terrestrial vertebrates of South Africa, known only from the Permian age Eodicynodon Assemblage Zone in Western Cape Province, has resulted in the discovery of a therapsid fauna in Eastern Cape Province that is dominated by advanced dinocephalians. The new discoveries include the skull and partial skeleton of a juvenile Anteosaurus, skull and skeletal elements of tapinocephalids, as well as the skull of a scylacosaurid therocephalian. The combined presence of advanced tapinocephalid dinocephalians, the anteosaur Anteosaurus, and scylacosaurid therocephalians suggests that the rocks of the lowermost Beaufort Group in the Eastern Cape Province can be assigned to the Tapinocephalus Assemblage Zone, rather than to the Eodicynodon Assemblage Zone, which appears to be restricted to the southwestern part of the Karoo Basin. This biozone identity permits the recognition of a younger age for the Ecca-Beaufort contact eastwards along the southern margin of the basin, thus demonstrating the diachronous nature of the Ecca-Beaufort contact in the southern Karoo.
  • Full Text:
  • Date Issued: 2001

A short history of the Cathedral bells

  • Authors: Lewis, Colin A
  • Date: 2001
  • Language: English
  • Type: Article
  • Identifier: vital:6170 , http://hdl.handle.net/10962/d1012360
  • Description: [From Introduction] The first suggestion that there should be a peal of bells in the town appears to have been made around August 1860 when Prince Altred laid the foundation stone of the Alfred Tower. Designed by Joseph Flashman, a local architect, it was to be "in the early English style of architecture, 150 n high'' and to contain a public clock and a peal of bells. The following year, the Vestry asked I3p Cotterill to contact George Gilbert Scott, a highly regarded architect in England, "for the remodelling of the Cathedral in keeping with the Alfred Tower." , Colin Lewis was Professor of Geography at Rhodes University, Grahamstown, South Africa from 1989 until his retirement at the end of 2007. In 1990, with the strong support of the incumbent Vice-Chancellor, Dr Derek Henderson, he instigated the Certificate in Change Ringing (Church Bell Ringing) in the Rhodes University Department of Music and Musicology - the first such course to be offered in Africa. Since that date he has lectured in the basic theory, and taught the practice of change ringing. He is the Ringing Master of the Cathedral of St Michael and St George, Grahamstown, South Africa.
  • Full Text:
  • Date Issued: 2001

SADTU National - JHB

  • Authors: SADTU
  • Date: May 2001
  • Subjects: SADTU
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/118019 , vital:34585
  • Full Text:
  • Date Issued: May 2001

On two species of Paectira Karsch (Hemiptera: Cicadidae) from Kenya

  • Authors: Villet, Martin H
  • Date: 1999
  • Language: English
  • Type: Article
  • Identifier: vital:6850 , http://hdl.handle.net/10962/d1011131
  • Description: During an ongoing revision of the genera of southern African Cicadidae (Hemiptera), examination of the holotype of Xosopsaltria fuliginosa Distant, 1905, showed that this species is not a member of Xosopsaltria Karsch, 1890, but that it belongs in the genus Paectira Karsch, 1890 (= Inyamana Distant, 1905). It is redescribed and illustrated here. As Heller's (1980) revision of this genus highlighted the paucity of records of species in this endemic East African taxon, details of material of Paectira jeanuaudi Boulard, 1977, from the Rhodes University Entomological Collection are recorded here. The specimens are in the Natural History Museum, London (BMNH), and the Albany Museum, Grahamstown (AMGS). All drawings were made using a Wild M5 stereomicroscope and camera lucida, and morphometric details of specimens were measured with vernier callipers. Anatomical terminology follows Boulard (1972) and Villet (1987,1997).
  • Full Text:
  • Date Issued: 1999

Phoretic association of blackflies (Oiptera: Simuliidae) with heptageniid mayflies (Ephemeroptera: Heptageniidae) in South Africa

  • Authors: de Moor, Ferdy C
  • Date: 1999
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/452172 , vital:75109 , https://journals.co.za/doi/pdf/10.10520/AJA10213589_400
  • Description: The phoretic or epizoitic association of blackfly (Diptera: Simuliidae) larvae and pupae with other aquatic arthropods has been documented for a number of tropical African species (Grenier and Mouchet 1959; Corbet 1961, 1962; Germain et al. 1966; Disney 1969, 1971a-d, 1973; also references in Crosskey 1990). The significance of these associations has led to much speculation, although no scientific conclusions regarding the origin and purposes of the associations have been reached (Corbet 1961; Crosskey 1990).
  • Full Text:
  • Date Issued: 1999

Reproductive behaviour of Plectroctena mandibularis F. Smith (Hymenoptera: Formicidae), a ponerine ant with ergatoid queens

  • Authors: Villet, Martin H
  • Date: 1999
  • Language: English
  • Type: Article
  • Identifier: vital:6890 , http://hdl.handle.net/10962/d1011650
  • Description: [From the text]: The present study reports on new observations on the reproductive biology of P. mandibularis, particularly the phenology of males, mating behaviour and colony founding, that may help in deciding between alternative explanations for the occurrence of ergatoid queens in this species.
  • Full Text:
  • Date Issued: 1999

Barbara Lomax Trade Union School for Women 25-30 October 1998 at Franshhoek mountain manor

  • Authors: NUMSA
  • Date: Oct 1998
  • Subjects: NUMSA
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/112503 , vital:33601
  • Description: This was the first time I attended any Gender workshop or seminar. I can truly say that this was a real eyeopener to me. I would recommend this course or any other similar course to all women and not only to trade unionist , because we must empower ourselves.
  • Full Text:
  • Date Issued: Oct 1998

Insurance Second Amendment Act and the Demutualisation Levy Bill

  • Authors: COSATU
  • Date: Aug 1998
  • Subjects: COSATU
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/109835 , vital:33194
  • Description: COSATU has for many years been campaigning for the democratisation of the Mutuals in order to see to it that their considerable resources could be used more effectively in promoting economic development. In our 1996 Social Equity and Job Creation document COSATU, together with the other major trade union federations, argued that: "Mutual insurance companies such as Old Mutual and Sanlam are nominally controlled by policy-holders, but in practice are controlled by their managers. These companies control and manage large sums of provident fund contributions from workers yet grant no real ownership rights to workers". On this basis we proposed that: "Organised labour and other representatives of policy holders, be given immediate representation on the governing structures of the mutual companies, and that these companies be requested to commence negotiation through Nedlac on this proposal. Thereafter, appropriate legislative changes should be introduced through parliament."
  • Full Text:
  • Date Issued: Aug 1998
  • Disclaimer
  • Privacy
  • Copyright
  • Contact