The inception phase of a case study of outcomes - based education assessment policy in the Human and Social Sciences Learning Area of C2005
- Authors: Wilmot, P Dianne
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6107 , http://hdl.handle.net/10962/d1009736
- Description: This article describes the Inception Phase (January to December 2002) of an ongoing research project focused on the Grade 9 Learning Area of Human and Social Sciences of Curriculum 2005. The case study involves a dynamic interaction between a university lecturer, playing the role of 'outside facilitator', and the History and Geography teachers at two independent schools. The article describes how teachers in a given context respond to outcomes-based education assessment policy, and the tools and processes they use to develop the deep understanding inferred by policy (Republic of South Africa, 2000) to implement change in a meaningful way. The article consists of three sections. The first contextualises significant events which foregrounded and provided the impetus for the research project. It provides an overview of the theory informing the research and the goals of the research. The second analyses in narrative form the various stages of the Inception Phase. It describes a process of curriculum development which has involved the development of criterion- referenced assessment rubrics, a Learner and Curriculum Profile, and an audit of current assessment practices in History and Geography at the two schools. The article illuminates the time and effort necessary for creative and systemic curriculum innovation. The final section synthesizes the information gathered.
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- Date Issued: 2003
Recruitment behaviour in the ponerine ant, Plectroctena mandibularis F. Smith (Hymenoptera: Formicidae)
- Authors: Wilkins, K J , Harman, K , Villet, Martin H
- Date: 2006
- Language: English
- Type: text , Article
- Identifier: vital:6887 , http://hdl.handle.net/10962/d1011647
- Description: Although workers of Plectroctena mandibularis laid trails with their stings while foraging, the trails appeared to be for individual orientation, because they never recruited nestmates to prey. However, both workers and queens laid trails when recruiting nestmates of either caste to new nest sites. During trail-laying, fluted hairs on the posterior edge of tergite VI were dragged along the ground, presumably applying a pheromone to the substrate. Anatomical and behavioural evidence suggests that pygidial gland secretions moved from the intersegmental pygidial gland between tergites VI and VII into a fingerprint-like, lamellar cuticular reservoir on the pygidium, and from there via the hairs to the substrate. These results suggest that recruitment may be crucial to moving nests but of value only to certain types of foraging, and that recruitment might even have originated in the Formicidae in the context of colony relocation, and then secondarily evolved to assist foraging.
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- Date Issued: 2006
Mapping the location of 2.4 GHz transmitters to achieve optimal usage of an IEEE 802.11 network
- Authors: Wells, David D , Siebörger, Ingrid G , Irwin, Barry V W
- Date: 2008
- Language: English
- Type: Conference paper
- Identifier: vital:6605 , http://hdl.handle.net/10962/d1009325
- Description: This paper describes the use of a low cost 2.4 GHz spectrum analyser, the MetaGeek WiSpy device, in conjunction with custom developed client-server software for the accurate identification of 2.4 GHz transmitters within a given area. The WiSpy dongle together with the custom developed software allow for determination of the positions of Wi-Fi transmitters to within a few meters, which can be helpful in reducing the work load for physical searches in the process of surveying the Wi-Fi network and geographical area. This paper describes the tool and methodology for a site survey as a component that can be used in organisations wishing to audit their environments for Wi-Fi networks. The tool produced from this project, the WiSpy Signal Source Mapping Tool, is a three part application based on a client-server architecture. One part interfaces with a low cost 2.4 GHz spectrum analyser, another stores the data collected from all the spectrum analysers and the third part interprets the data to provide a graphical overview of the Wi-Fi network being analysed. The location of the spectrum analysers are entered as GPS points, and the tool can interface with a GPS device to automatically update its geographical location. The graphical representation of the 2.4 GHz spectrum populated with Wi-Fi devices (Wi-Fi network) provided a fairly accurate method in locating and tracking 2.4 GHz devices. Accuracy of the WiSpy Signal Source Mapping Tool is hindered by obstructions, interferences within the area or non line of sight.
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- Date Issued: 2008
Mapping subtidal estuarine habitats with a remotely operated underwater vehicle (ROV):
- Authors: Wasserman, J , Claassens, L , Adams, J B
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150163 , vital:38945 , DOI: 10.2989/1814232X.2020.1731598
- Description: Subtidal habitats have not yet been accounted for in habitat maps of South African estuaries. In this study, a novel method for mapping subtidal estuarine habitats, using a remotely operated underwater vehicle (ROV) piloted from a boat, was developed and tested in the Knysna Estuary. Video footage was recorded along 48 transects across the width of the estuary, and then reviewed to identify, classify and map habitats. Using the method developed in this study, 21 hours of footage was recorded over 15 days of sampling, and about 30 hours of post-processing was carried out to map an area exceeding 850 ha. This study has produced the first baseline dataset of subtidal habitats for a South African estuary. Additionally, the study revealed the previously unknown distribution of the invasive red seaweed Asparagopsis taxiformis, and the underestimation in previous studies of the estuary of area cover of eelgrass Zostera capensis by 130 ha.
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- Date Issued: 2020
Characterization of a succession of small insect viruses in a wild South African population of Nudaurelia cytherea capensis (Lepidoptera: Saturniidae)
- Authors: Walter, Cheryl T , Tomasicchio, Michelle , Hodgson, V , Hendry, Donald A , Hill, Martin P , Dorrington, Rosemary A
- Date: 2008
- Language: English
- Type: Article
- Identifier: vital:6474 , http://hdl.handle.net/10962/d1006161 , http://www.scielo.org.za/scielo.php?pid=S0038-23532008000200015&script=sci_arttext
- Description: The Tetraviridae are a family of small insect RNA viruses first discovered in South Africa some 40 years ago. They consist of one or two single-stranded (+) RNAs encapsidated in an icosahedral capsid of approximately 40 nm in diameter, with T = 4 symmetry. The type members of the two genera within this family, Nudaurelia β virus (NβV) and Nudaurelia ω virus (NωV), infect Nudaurelia cytherea capensis (pine emperor moth) larvae. The absence of N. capensis laboratory colonies and tissue culture cell lines susceptible to virus infection have limited research on the biology of NβV and NωV because the availability of infectious virus is dependent upon sporadic outbreaks in the wild N. capensis populations. In September 2002, dead and dying N. capensis larvae exhibiting symptoms similar to those reported previously in other tetravirus infections were observed in a wild population in a pine forest in the Western Cape province of South Africa. We report here the isolation of three small insect viruses from this population over a period of three years. Transmission electron microscopy and serological characterization indicate that all three are tetra-like virus isolates. One isolate was shown by cDNA sequence analysis to be NβV, which was thought to have been extinct since 1985. The two other isolates are likely new tetraviruses, designated Nudaurelia ψ virus (NψV) and Nudaurelia ζ virus (NζV), which are morphologically and serologically related to NωV and NβV, respectively.
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- Date Issued: 2008
Sensitive high-performance liquid chromatographic determination of cyclizine and its demethylated metabolite, norcyclizine, in biological fluids using coulometric detection
- Authors: Walker, Roderick B , Kanfer, Isadore
- Date: 1995
- Language: English
- Type: text , Article
- Identifier: vital:6452 , http://hdl.handle.net/10962/d1006640 , http://dx.doi.org/10.1016/0378-4347(95)00202-T
- Description: An accurate, sensitive, selective and reproducible high-performance liquid chromatographic method with coulometric detection for the determination of cyclizine and its inactive demethylated metabolite, norcyclizine, in biological fluids has been developed. The drugs were separated using a custom packed reversed-phase C18 analytical column and phosphate buffer (0.05 M, pH 3)-acetonitrile (7:3) as mobile phase. The dual electrode coulometric detector was operated in the "oxidative-screen" mode with the upstream electrode (detector 1) set at 0.55 V and the downstream electrode (detector 2) set at 0.90 V. Serum and urine samples were prepared for analysis by solid-phase extraction, followed by a simple phase-separation step. The limit of quantitation was 1 ng/ml for both cyclizine and norcyclizine in serum and urine.
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- Date Issued: 1995
Technology for Educators: EDT 221
Technology for Educators: EDT 221
- Authors: Vye, Z , Tyilo, P N
- Date: 2010-11
- Subjects: Education
- Language: English
- Type: Examination paper
- Identifier: vital:17346 , http://hdl.handle.net/10353/d1010208
- Description: Examination on Technology for Educators: EDT 221, November 2010.
- Full Text: false
- Date Issued: 2010-11
Technology for Educators: EDT 221
- Authors: Vye, Z , Tyilo, P N
- Date: 2010-01
- Subjects: Education
- Language: English
- Type: Examination paper
- Identifier: vital:17293 , http://hdl.handle.net/10353/d1010116
- Description: Supplementary examination on Technology for Educators: EDT 221, January 2010.
- Full Text: false
- Date Issued: 2010-01
A.k.a. Breyten Breytenbach : critical approaches to his writings and paintings, J.L. Coullie and J.U. Jacobs, eds. : book review
- Authors: Vorster, A F
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6335 , http://hdl.handle.net/10962/d1012399
- Description: a.k.a. Breyten Breytenbach brings together a collection of 14 essays by 12 scholars on the work of this remarkable South African writer, poet and painter. Designating Breytenbach as ‘South African’ is, of course, already a highly contentious act. It relates directly to the central concern of this volume (and one of the central concerns of Breytenbach’s work), namely the question of identity. The title characterises the artist’s proper name as but one in a series of constantly shifting and interchanging personas adopted in his art (and in his life, e.g. when working underground in the 1970s to contribute to the overthrow of the apartheid regime). The painting on the cover further explores the theme of the mask, with the white male figure’s face covered by a book-like object (although his eyes are partially visible through the object), and the presence of a burning hat floating in the air next to him serves as an additional link with many of his other paintings where headgear is associated with shifting identities, as pointed out by Marilet Sienaert in her essay, “The I of the Beholder: Identity and Place in the Art and Writing.” Like several of the other authors, Sienaert places great emphasis on the notion of movement or transformation as critical to Breytenbach’s thinking and creative practice. It is virtually unavoidable, given his background, that he should grapple with “the contemporary notion of ‘home’ being both everywhere and nowhere”, and that travel and nomadism should have become two of the most prominent themes in his poetry as well as his prose. Identity and creativity are both dependent upon the ability to constantly renew oneself and to “keep moving”.
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- Date Issued: 2005
New lives for old: modernity, biomedicine, traditional culture and HIV prevention in Lesotho (a response to Nicola L. Bulled)
- Authors: Vincent, Louise
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141855 , vital:38010 , DOI: 10.1080/23269995.2013.805526
- Description: This is a reply to - Bulled, Nicola L. 2013. “New lives for old: modernity, biomedicine, traditional culture and HIV prevention in Lesotho.” Global Discourse. 3 (2): 284–299. http://0-dx.doi.org.wam.seals.ac.za/10.1080/23269995.2013.804700.
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- Date Issued: 2013
Where has all the Geography gone? : a social constructivist perspective of Curriculum 2005
- Authors: Van Harmelen, U
- Date: 1999
- Language: English
- Type: Article
- Identifier: vital:6092 , http://hdl.handle.net/10962/d1008614
- Description: The apparently tenuous position of geography in Curriculum 2005 suggests the need to reassess the nature and role of geographical education for the South African learner. The new curriculum is designed to provide a general education experience and this paper therefore considers geography's role within this framework. In so doing it raises questions that impact on the view we take of geography within Curriculum 2005 and explores the implications for teaching and learning within this educational band. For many learners in South Africa geography is seen as little more than 'book knowledge'. Not only has the content been de-contextualised from the learner's reality, but also the method of learning is largely dependent on the rote learning of a frightening array of facts from a single textbook or teacher designed notes. However, the learner-centred approach adopted by Curriculum 2005 creates considerable possibilities for the development of geographical understanding in the sense of making meaning, problem solving and the development of creative and critical thinking. The situation of geographical education in the GET band of Curriculum 2005 presents geography educators and teacher educators with considerable challenges and demands a radical shift in perspective in terms of what constitutes geographical knowledge in this band as well as its acquisition. The paper argues that a social constructivist approach within the 'new' systems theory, creates possibilities for learners to acquire the conceptual understanding, skills, values and attitudes needed as a foundation for further learning in geography and to enable them to function effectively and responsibly in space-place and time.
- Full Text: false
- Date Issued: 1999
Introduction to Remote Sensing: GIS 501
- Authors: Tyson, C , Palmer, A R
- Date: 2011-06
- Language: English
- Type: Examination paper
- Identifier: vital:17913 , http://hdl.handle.net/10353/d1011144
- Description: Introduction to Remote Sensing: GIS 501, Honours examination June 2011.
- Full Text: false
- Date Issued: 2011-06
GIS for Decision Support: GIS 503
Spotlight on the Art of Darkness: The Kin Artstudio
- Authors: Tshilumba Mukendi, J S
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/146434 , vital:38525 , https://artafricamagazine.org/magazine-archive/?v=e4dd286dc7d7
- Description: Issue December 2016. What Really Matters.
- Full Text:
- Date Issued: 2016
Radio and X-ray detections of GX 339–4 in quiescence using MeerKAT and Swift:
- Authors: Tremou, E , Corbel, S , Fender, R P , Woudt, P A , Miller-Jones, J C A , Motta, S E , Heywood, I , Armstrong, R P , Groot, P , Horesh, A , Van der Horst, A J , Koerding, E , Mooley, K P , Rowlinson, A , Wijers, R A M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/149862 , vital:38907 , https://0-doi.org.wam.seals.ac.za/10.1093/mnrasl/slaa019
- Description: The radio–X-ray correlation that characterizes accreting black holes at all mass scales – from stellar mass black holes in binary systems to supermassive black holes powering active galactic nuclei – is one of the most important pieces of observational evidence supporting the existence of a connection between the accretion process and the generation of collimated outflows – or jets – in accreting systems. Although recent studies suggest that the correlation extends down to low luminosities, only a handful of stellar mass black holes have been clearly detected, and in general only upper limits (especially at radio wavelengths) can be obtained during quiescence. We recently obtained detections of the black hole X-ray binary (XRB) GX 339–4 in quiescence using the Meer Karoo Array Telescope (MeerKAT) radio telescope and Swift X-ray Telescope instrument on board the Neil Gehrels Swift Observatory, probing the lower end of the radio–X-ray correlation. We present the properties of accretion and of the connected generation of jets in the poorly studied low-accretion rate regime for this canonical black hole XRB system.
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- Date Issued: 2020
Job summit - reading pack: prepared for TCOE
- Authors: Trade Union Library & Education Centre
- Date: 19uu
- Subjects: Uncatalogued
- Language: English
- Type: book , text
- Identifier: http://hdl.handle.net/10962/60362 , vital:27773
- Description: Reading pack compiled in view of the Job Summit as emerged from Nedlac's Labour Market Commission report released in 1996.
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- Date Issued: 19uu
Groote Schuur Hospital - General information on service conditions
- Authors: Trade Union Library
- Date: Dec 1982
- Subjects: Trade Union Library
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/118567 , vital:34646
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- Date Issued: Dec 1982
The effect of land-use on small mammal diversity inside and outside the Great Fish River Nature Reserve, Eastern Cape, South Africa
- Authors: Thondhlana, Gladman , Lagesse, Juliette V
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67823 , vital:29150 , https://doi.org/10.1016/j.jaridenv.2016.03.006
- Description: Publisher version , This study investigated small mammal species diversity at 10 paired contrast sites along a fence line inside and outside the Great Fish River Nature Reserve (GFRNR), Eastern Cape, South Africa. The sites outside the GFRNR are used for subsistence land-based activities including livestock production and fuelwood harvesting. From 145 live captures, a total of 114 unique individuals of five small mammal species (four rodents and one elephant shrew) were recorded over 1170 trap nights. Average small mammal species diversity and abundance were significantly higher inside the reserve than outside. Human activities such as livestock grazing seemed to explain low levels of small mammal diversity and abundance at the communal sites. Vegetation variables showed a complex interplay with small mammal diversity. In general, high vegetation diversity had a positive influence on small mammal diversity though the influence of some environmental variables was species-dependent. We conclude that the GFRNR is effective in protecting small mammals but the findings raise questions around the influence of land use practices such as livestock grazing on biodiversity, especially given that local communities in South Africa are continuously seeking greater access to reserves for livestock grazing and other provisioning services.
- Full Text: false
- Date Issued: 2016
A study of the kinetics of a high temperature thermoluminescence peak in annealed natural quartz
- Authors: Thomas, Sunil , Chithambo, Makaiko L
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/110007 , vital:33213 , DOI: 10.1016/j.jlumin.2018.08.077
- Description: Thermoluminescence of a high temperature secondary glow-peak in natural quartz annealed at 900 °C is reported. The glow-curve of a sample irradiated to 10 Gy and measured at 1 °C/s shows three peaks; the main peak at 71 °C and two other weaker-intensity peaks at 125 °C and 177 °C. For reference, the peaks are labelled as I, II and III. This study is concerned with the secondary peak at 177 °C (peak III). The electron trap responsible for peak III is stable at ambient temperature as determined by monitoring the peak intensity after various delays between irradiation and measurement. The activation energy and frequency factor of the peak were estimated as ~1.24 eV and ~10¹² s⁻¹ respectively. The dose response of the peak in the range 1–300 Gy is sublinear. The influence of either partial heating or irradiation dose on the peak position suggest that the peak follows non-first-order kinetics.
- Full Text: false
- Date Issued: 2018