Showing items 24886 - 24905 of 66233

A distributed approach to surround sound production

- Smith, Adrian Wilfrid

  • Authors: Smith, Adrian Wilfrid
  • Date: 1999
  • Subjects: Surround-sound systems , Computer sound processing , Music -- Data processing
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4602 , http://hdl.handle.net/10962/d1004855 , Surround-sound systems , Computer sound processing , Music -- Data processing
  • Description: The requirement for multi-channel surround sound in audio production applications is growing rapidly. Audio processing in these applications can be costly, particularly in multi-channel systems. A distributed approach is proposed for the development of a realtime spatialization system for surround sound music production, using Ambisonic surround sound methods. The latency in the system is analyzed, with a focus on the audio processing and network delays, in order to ascertain the feasibility of an enhanced, distributed real-time spatialization system.
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  • Date Issued: 1999

A Distributed System for the Creation and Delivery of Ambisonic Surround Sound Audio

- Foss, Richard, Smith, Adrian

  • Authors: Foss, Richard , Smith, Adrian
  • Date: 1999
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/427347 , vital:72432 , https://www.aes.org/e-lib/online/browse.cfm?elib=8044
  • Description: A system has been created for the production of ambisonic surround sound compositions using a client-server architecture. Those calculations requiring processing power and large amounts of disc storage and disc access are relegated to the server, while the client provides an intuitive user interface and limited processing. The server plays the role of a remote surround sound processing engine, which can be utilized by clients. The system has been constructed, and the feasibility of the approach has been evaluated via experimental data.
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  • Date Issued: 1999

A foreign policy for all?: South Africa and the call for an African Renaissance

- Bischoff, Paul, 1954-

  • Authors: Bischoff, Paul, 1954-
  • Date: 1999
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/161388 , vital:40622 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC15569
  • Description: In the political vacuum that accompanies Africa's 'strategic marginalisation' and in a situation of fifteen conflicts, our continent finds itself in a state of flux. Here lies the challenge for inter-African diplomacy and regional initiatives by state and non-state actors seeking to indigenously define, manage and contain conflict. The intention must be a purposive one: to seek to normatively structure an environment 'paddocked' to provide security for states, civic society, communities, women, children and individuals.
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  • Date Issued: 1999

A generic virtual reality interaction system and its extensions using the common object request broker architecture (CORBA)

- Rorke, Michael, Bangay, Shaun D

  • Authors: Rorke, Michael , Bangay, Shaun D
  • Date: 1999
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/432684 , vital:72892 , https://www.cs.ru.ac.za/research/Groups/vrsig/pastprojects/013interaction/paper03.pdf
  • Description: The paper describes the design and implementation of an immersive Virtual Reality (VR) interaction system. The system aims to provide a flexible mechanism for programmers to implement interaction in their VR applications, making good use of all accepted practices in the field. The paper further describes how the system was extended to a multi-user system using the CORBA middleware layer.
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  • Date Issued: 1999

A history of the Good Shepherd School, Huntley Street, Grahamstown

- Holshausen, Nicole

  • Authors: Holshausen, Nicole
  • Date: 1999
  • Subjects: Good Shepherd School (South Africa) -- History Schools -- South Africa -- Eastern Cape Schools -- Grahamstown (South Africa)
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1554 , http://hdl.handle.net/10962/d1003436
  • Description: This thesis is a qualitative, historical study of The Good Shepherd School in Huntly Street, Grahamstown, South Africa. It is one of the oldest school buildings in South Africa that remains in use as a school. There are two main threads to understanding The Good Shepherd School in context. The first of these threads, the colonial root of the school, is explained in a discussion of the Grammar School, attached to the Cathedral of St. Michael and St. George, that utilised the Huntly Street facilities from 1851 to 1902. The second thread is the strong tradition of caring for the underprivileged. This is traced through following the development of the educational works of The Community of the Resurrection which involves the discussion of various schools at different locations in Grahamstown. The current school on the Huntly Street premises, The Good Shepherd School, forms, however, the focus of this study, which draws on all the histories of its forerunners and their historical locations. Historical social science methods and procedures were used in the research. This was done through documentary analysis of evidence as well as through semi-structured interviews, creating an interpretative account of how the school has affected people's lives. The conclusion reached is that The Good Shepherd School has contributed greatly to the education of underprivileged people in the Grahamstown area. It appears to be an outstanding example of a school offering a well-rounded, caring education when this was historically denied to many people in South Africa.
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  • Date Issued: 1999

A logos of difference: the Kantian roots of Derrida's deconstructive thinking

- Hurst, Andrea Margaret

  • Authors: Hurst, Andrea Margaret
  • Date: 1999
  • Subjects: Derrida, Jacques -- Philosophy , Deconstruction , Philosophy
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:11003 , http://hdl.handle.net/10948/d1015554
  • Description: This study concerns a contemporary articulation of the age-old limit/possibility (truth/scepticism) contest in Western metaphysics. Traditional `either/or' logic advises that scepticism is a necessary consequence of the assailability of truth; hence the concerted effort in the history of philosophy to preserve the possibility of truth against any flicker of uncertainty. Here, it is argued that contemporary thinking sees the possibility of `absolute' truth lose its ground. However, a concomitant shift to a `logos of difference' averts the consequence of scepticism. Thus, the justification for this study could be articulated in terms of the imperative, if a cardinal moment in contemporary thought is to be sustained, to understand this shift in logos, work through its implications and learn to live with its effects. In this respect, an attempt is made throughout to situate and interpret Derrida's `deconstructive thinking' as exemplar. Derrida's thinking finds roots (not without signs of insurrection) in Kant's `Copernican revolution,' construed as the first shift towards the contemporary logos in question. Here, Kant refuted the postulate of an independent `world' by demonstrating that `reality' was the result of a cognitive order imposed on what `exists' by the rational subject. Knowledge, therefore, depended not on matching statements with pre-existing `things,' but on knowing the `rules' that determined how an object had to be if it was to be known at all. Kant maintained that certain, objective knowledge was possible, due to the completeness and universality of the forms of intuition and the categories of the understanding. Kant's `Copernican revolution' provided the opening for a second shift inaugurated by the so- called `linguistic turn.' Here, thinkers contested what Kant took for granted; namely that `constitutive interpretations' (cognitions/concepts) formed a `reality' independently of language. The basic premise underpinning the `linguistic turn,' therefore, is that language (signification) and `reality' are inseparable. Henceforth, the possibility of final, enduring `constitutive interpretations' whose `truth,' in principle, is discoverable, depends on whether or not the language which mediates human rationality can form a complete and universal system. This question resurrects the very limit/possibility debate (in the form of a structuralism/postmodernism stand-off) that Kant thought he had resolved in mediating between rationalist and empiricist extremes. In contemporary terms, philosophers who, bound by either/or logic, wish to avoid the sceptical trap of `anything goes' postmodernism, must assume that language (signification) can form a complete and universal system. However, in his deconstructive readings of Husserl, Saussure and `structuralism,' Derrida demonstrates the untenability of this assumption. At the same time, he shows that the sceptical `alternative' may be avoided by recognising the limitations of `either/or' logic. Again, Derrida's thinking may be traced to Kant's; this time to his analysis of the `first antinomy.' In accordance with Kant's analysis here of what is ultimately the logic of `complex systems' (Cilliers), Derrida offers a `logos of difference,' which skirts the strictures of structuralism while avoiding the trap of postmodern scepticism by accommodating both moments of limit and possibility in an indissoluble interplay.
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  • Date Issued: 1999

A pilot study of the use of groupwork in biology education at the Griffiths Mxenge College of Education : a research project ; Towards an effective implementation of assessment of biology practical work under ʺcurriculum 2005ʺ

- Kwayisi, Frederick Ntow

  • Authors: Kwayisi, Frederick Ntow
  • Date: 1999
  • Subjects: Biology -- Study and teaching -- South Africa Group work in education Biology -- Curricula Curriculum change -- South Africa Curriculum planning -- South Africa Competency-based education -- South Africa Inclusive education -- South Africa
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1705 , http://hdl.handle.net/10962/d1003588
  • Description: A pilot study of the use of groupwork in biology education at the Griffiths Mxenge College of Education: The Government of National Unity in 1994 introduced a new educational policy for the country. This represented a shift in paradigm from a transmission mode of teaching and learning to learner-centered education. The shift marks a transformation from a contentbased curriculum to an outcomes based education (aBE). aBE, which is underpinned by Constructivism and Social Constructivism advocates for the use of groupwork as a strategy for achieving the outcomes envisaged in our learners. The challenge facing teachers and educators is how to implement outcomes based education. The intention of this research is therefore to serve as a pilot project to find out about how groupwork may be used in teaching. It looks at types of groups, considerations a teacher should have in forming groups, dynamics which come into play during teaching and gives suggestions as to how groupwork problems may be solved. Others issued are also raised which were not fully covered in the research. It is the hope of the researcher that the project would be a basis for further research on the use of group work in teaching under outcomes based education. Towards an effective implementation of assessment of biology practical work under "curriculum 2005" Transformation taking place in education in the Republic of South Africa has implications for assessment. It involves a move away from the transmission mode of teaching and learning, to a learner-centered education with the attainment of outcomes. It is a move away from the summative mode of assessment to a formative mode, where assessment leads to the development of the learner and monitor and support teaching and learning. Questions arise as to what to assess, how, when to assess and by whom? This research project is an initial attempt to look at how this assessment policy may be implemented effectively in schools and colleges, using the teaching and learning of practical biology as a tool. It looks at examples of assessment methods that may be used to assess learners work, their functions and problems that may arise in the teachers attempt to transform hislher practices. Suggestions are made on factors to consider in implementing assessment practice and how problems, which may arise in assessment, may be overcome.
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  • Date Issued: 1999

A Prototyping Environment for Investigating Context Aware Wearable Applications.

- Tsegaye, Melekam, Bangay, Shaun D, Terzoli, Alfredo

  • Authors: Tsegaye, Melekam , Bangay, Shaun D , Terzoli, Alfredo
  • Date: 1999
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/432783 , vital:72900 , https://www.cs.ru.ac.za/research/g98t4414/static/papers/wearprototsegaye05.pdf
  • Description: In this paper we introduce the concept of a contextaware, wearable application prototyping environment, which can be used to support research into new wearable applications. We also present an initial specification for such an environment and show how different types of sensors can be modelled to produce data that describes a given context scenario using our prototyping approach.
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  • Date Issued: 1999

A review of Southern African kimberlites and exploration techniques

- Venter, Louis Johannes

  • Authors: Venter, Louis Johannes
  • Date: 1999 , 2013-10-04
  • Subjects: Kimberlite -- Africa, Southern , Diamonds -- Africa, Southern , Prospecting -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5033 , http://hdl.handle.net/10962/d1007278 , Kimberlite -- Africa, Southern , Diamonds -- Africa, Southern , Prospecting -- South Africa
  • Description: The dissertation reviews the present knowledge regarding diamonds, from its formation in the lithospheric upper mantle at depths between 150 and 300 km, to its final valuation in terms of US$/carat by diamantaires in London, Antwerp, Tel Aviv and New York. The dissertation is divided into two complimentary sections. Section one focuses on the formation, emplacement, occurrence and characteristics of kimberlites and, when present, their associated trace amounts of diamonds. The section follows a logical sequence from the regional tectonic-, local structrual- and geodynamic controls on kimberlite formation and emplacement to the characteristics of individual kimberlite morphology, mineralogy, petrography and geochemistry. Finally, the environment or diamond formation, resorption and the characteristics that have led to the marketability of diamonds are discussed. Section two reviews the current exploration techniques used in locating diamondiferous kimberliies and the subsequent economic evaluation of these kimberlites. A brief history of known Southern African kimberlite occurrences, grades, tonnages, tectonic settings, ages and regional structural controls is given. The prospective countries mentioned are Angola, Botswana, Lesotho, South Africa, Swaziland, Tanzania and Zimbabwe. Exploration techniques considered are ; the application of a landscape analysis and investigation of the surface processes active in a given area, indicator mineral sampling (with reference to their mineralogy and exploration significance), remote sensing techniques (subdivided into satellite imagery and aerial photography), geophysical techniques (including the magnetic-, gravity-, electrical-, radiometric- and seismic methods as well as heat flow models), geochemical techniques, petrographic- and electron beam techniques as well as geobotanical- and geobiological techniques. Finally, a brief summary of current evaluation techniques employed on diamondiferous kimberlite deposits is presented. The review covers kimberlite sampling methods, sample processing, diamond grade distributions (with reference to the experimental variogram model, statistical methods used in grade distribution calculations as well as block definition and local grade estimation). Stone size distributions, including microdiamond counts and value estimation, are also discussed. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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  • Date Issued: 1999

Adaptive flow management of multimedia data with a variable quality of service

- Littlejohn, Paul Stephen

  • Authors: Littlejohn, Paul Stephen
  • Date: 1999
  • Subjects: Multimedia systems , Multimedia systems -- Evaluation
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4605 , http://hdl.handle.net/10962/d1004863 , Multimedia systems , Multimedia systems -- Evaluation
  • Description: Much of the current research involving the delivery of multimedia data focuses on the need to maintain a constant Quality of Service (QoS) throughout the lifetime of the connection. Delivery of a constant QoS requires that a guaranteed bandwidth is available for the entire connection. Techniques, such as resource reservation, are able to provide for this. These approaches work well across networks that are fairly homogeneous, and which have sufficient resources to sustain the guarantees, but are not currently viable over either heterogeneous or unreliable networks. To cater for the great number of networks (including the Internet) which do not conform to the ideal conditions required by constant Quality of Service mechanisms, this thesis proposes a different approach, that of dynamically adjusting the QoS in response to changing network conditions. Instead of optimizing the Quality of Service, the approach used in this thesis seeks to ensure the delivery of the information, at the best possible quality, as determined by the carrying ability of the poorest segment in the network link. To illustrate and examine this model, a service-adaptive system is described, which allows for the streaming of multimedia audio data across a network using the RealTime Transport Protocol. This application continually adjusts its service requests in response to the current network conditions. A client/server model is outlined whereby the server attempts to provide scalable media content, in this case audio data, to a client at the highest possible Quality of Service. The thesis presents and evaluates a number of renegotiation methods for adjusting the Quality of Service between the client and server. An A djusted QoS renegotiation method algorithm is suggested, which delivers the best possible quality, within an acceptable loss boundary.
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  • Date Issued: 1999

Adja

- Billy Sincop, Goly Herve (key board), Vata Monbassa, Santa N'guessan, N'dri Martial (guitars), Niamkey Jusitine, Botha Therese, Loukou Kedjebo, N'guessan Pitie, Gerbasco, Kouadio Maurison (chorus), Santa N'guessan (arrangement), Kouadio Maurison (perfromer), Santa N'guessan

Adsorptive cathodic stripping voltammetric determination of gold (III) in the presence of yeast mannan

- Lack, Barbara, Duncan, John R, Nyokong, Tebello

  • Authors: Lack, Barbara , Duncan, John R , Nyokong, Tebello
  • Date: 1999
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/293151 , vital:57060 , xlink:href="https://doi.org/10.1016/S0003-2670(98)00736-3"
  • Description: Adsorptive cathodic stripping voltammetric (AdCSV) studies of gold(III) on a glassy carbon electrode and in the presence of yeast mannan are reported. These studies give evidence of the formation of a complex between gold(III) and mannan in acid media as judged by the enhancement in the AdCSV currents and shift in the reduction peak of gold(III) in the presence of mannan. The AdCSV currents were linearly dependent on gold(III) concentrations ranging from 7.0 × 10−7 to 3.0 × 10−4 mol dm−3. A detection limit of 6.0 × 10−8 mol dm−3 was obtained. Interferences of copper(II) were observed in the presence of mannan, but there was no significant interference of silver(I).
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  • Date Issued: 1999

Afo Pardon

- Amadou Sodia (lead singer, bolon, kora), Hadja Maningbe, Djanka Diabate, Awa Maiga, Valerie Belinga (chorus), Ansoumane Kante, Yeye (percussions), Adame Conde (balafon), Alpha Camara (congas), Ousmane Kouyate, Djely Moussa Kouyate,Manfila Kante (guitar), Djessou Mory (rythm guitar, solo), Brass: Christian Martinez (trumpet), Bernard Camoin (trombone), Thierry Farrugia (saxophone), Phillipe Guez (arrangement, keyboard), Patrick Mareck

Agwa

- Koniba Traore (author, composer, interpreter, performer), Straun Douglas

Ahomna

- Mukwena, E., Ndzelani, M, Magqirha, N, Tukani, N, Tukani, M, Pintshana, T, Mafika, E., Thukani, M. J., Ndzelani, N., Dargie, Dave

Aida Soukeu

- Thione Seck (lead singer), Raam Daan (band name of accompanying musicians), Syllart Production

Allal

- Micka Gomis (lead vocal, keyboard, percussion, composer, arranger), Pathe Jassi (bass, vocals), Ousmane Sowe (keyboard, horns, percussion), Omar Sowe (guitar), Ablaye "Bird" Ndiaye (saxophone), Papa Ndiaye Guewel (sabars, jimbe), Karim Mbaye (sabar), Kaare Wamberg (drums programming, vocals, guitar, bass), Josephone Ciss, Therese Mamady, Clara Mendy, Jeannette Senghor (chorus), Studio 2000

Amoussoussa

- Amadou Sodia (lead singer, bolon, kora), Hadja Maningbe, Djanka Diabate, Awa Maiga, Valerie Belinga (chorus), Ansoumane Kante, Yeye (percussions), Adame Conde (balafon), Alpha Camara (congas), Ousmane Kouyate, Djely Moussa Kouyate, Manfila Kante, Patrick Mareck (guitar), Djessou Mory (rythm guitar, solo), Brass: Christian Martinez (trumpet), Bernard Camoin (trombone), Thierry Farrugia (saxophone), Phillipe Guez (arrangement, keyboard), Patrick Mareck

An economic analysis of eradicating alien vegetation as an alternative to conventional water supply schemes: a case study of the Krom and Kouga

- Carpenter, Robert Charles

  • Authors: Carpenter, Robert Charles
  • Date: 1999
  • Subjects: Alien plants -- South Africa , Water-supply -- South Africa , Kouga River (South Africa)
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1000 , http://hdl.handle.net/10962/d1002735 , Alien plants -- South Africa , Water-supply -- South Africa , Kouga River (South Africa)
  • Description: South Africa is classified as an arid to semi-arid region and water scarcity in South Africa has been identified as a key factor limiting socioeconomic development in the next century. In the Algoa region, the total urban plus agricultural water demand is expected to exceed the supply by the year 2005. The Kouga Working for Water Project aims to increase the base flow to the existing dams which supply the Port Elizabeth metropolitan area through the eradication of invasive alien trees in the riparian areas of the Krom and Kouga catchments. This thesis analyses the economic efficiency of optimal catchment management as a water supply scheme. A cost-benefit analysis is conducted for the Kouga eradication programme, and its desirability is evaluated in terms of the net present value (NPV) and the internal rate of return (IRR) criteria. In order to compare the cost-e~i.ciency of the eradication programme to alternative water supply augmentation schemes the Unit Reference Value (URV) is calculated for the project. The NPV for the project is calculated using a discount rate of 7% and amounts to nearly R24 million. This positive NPV indicates that the project is economically desirable in that it results in the improvement of human welfare. The IRR decision rule supports this finding. The URV of the eradication scheme is found to be competitive to that generated by more conventional schemes. Considered in the evaluation of the project are a host of environmental benefits that accompany the eradication of alien vegetation. This is in contrast to alternative schemes which result in several detrimental impacts to the environment. The economic analysis concludes that the eradication of alien vegetation is an efficient and desirable alternative water supply augmentation scheme. The conclusions drawn from the analysis of the eradication programme in this catchment area can be extended to other catchment areas, with the aim of promoting the most efficient supply of water.
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  • Date Issued: 1999

An examination of employee participation as provided for in the Labour Relations Act 66 of 1995

- Khoza, Francisco Jabulani

  • Authors: Khoza, Francisco Jabulani
  • Date: 1999
  • Subjects: Decision making , Management -- Employee participation , Labor laws and legislation -- South Africa , South Africa. Labour Relations Act, 1995
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: vital:3676 , http://hdl.handle.net/10962/d1003191 , Decision making , Management -- Employee participation , Labor laws and legislation -- South Africa , South Africa. Labour Relations Act, 1995
  • Description: The thesis covers the field of labour law known as employee participation in decision-making. It deals with the examination of the extent to which the Labour Relations Act 66 of 1995 (the Act) promotes employee participation in decision-making. Firstly, the analysis shows that employee participation in decision-making is an aspect of democracy, which is translated into industrial democracy in industrial relations. In South Africa the philosophical foundation of employee participation is supported by the Constitution of the Republic of South Africa Act 108 of 1996 which embodies democratic values permeating all areas of the law including labour law. Secondly, the study elucidates the jurisprudential background of employee participation in South Africa. There is evidence of the development of some principles of participation like consultation; information disclosure; and the existence of participatory forums like works councils under the LRA 28 of 1956. Thirdly, in evaluating the extent to which the LRA 66 of 1995 promotes employee participation, the following aspects are covered: the relevance and contribution of information disclosure; the effect of consultation prior to dismissal for operational requirements; the role of collective bargaining; and the contribution of workplace forums. The conclusion is reached that all the foregoing aspects of the LRA 66 of 1995 will contribute to the promotion of employee participation in decision-making. The Labour Court and the Commission for Conciliation Mediation and Arbitration can also ensure that in interpreting the Act employee participation is promoted where appropriate. Finally, employers and employees will have to accept this necessary partnership for the entrenchment of employee participation in decision-making.
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  • Date Issued: 1999
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