An algorithm that is capable of estimating the parameters of non-stationary sinusoids in real-time lends application to various branches of engineering. Non-stationary sinusoids are sinusoidal signals with time-varying parameters. In this dissertation, a nonlinear filter is applied to power system applications to test its performance. The filter has a structure which renders it fully adaptive to tracking time variations in the parameters of the targeted sinusoid, including its phase and frequency. Mathematical properties of the differential equations which govern the proposed filter are presented. The performance of the proposed filter in the field of power systems is demonstrated with the aid of computer simulations and practical experimentations. The filter is applied to synchronous generator excitation control, voltage dip mitigation as well as the real-time estimation of symmetrical components. The parameter settings of the filter are tested and optimized for each of the applications. This dissertation demonstrates the simulation and experimental results of the filter when applied to the various power system applications. AFRIKAANS : 'n Filter wat bevoeglik is met die beraming van die parameters van beweeglike sinusoïdale in ware-tyd, kan bruikbaar aangewend word in verskeie takke van ingenieurswese. Beweeglike sinuskrommes is sinusoïdale seine met tyd-wisselende parameters. In hierdie verhandeling word `n nie-liniêre filter aangewend in verskeie kragstelseltoepassings om die werksverrigting van die filter te toets. Die filter het 'n struktuur wat dit toelaat om wisselende tydvariasies in die parameters van die teikensinusoïdaal op te spoor, insluitende die fase en frekwensie. Wiskundige eienskappe van die differensiaalvergelykings wat die voorgestelde filter beheer is ondersoek. Die werksverrigting van die voorgestelde filter in die veld van kragstelsels is gedemonstreer met die hulp van rekenaarsimulasies asook praktiese eksperimente. Die filter is toegepas tot opgewekte, sinkrone eksitasie-beheer, spanningsverlaging versagting, asook die ware tyd estimasie van simmetriese komponente. Die parameter verstellings van die filter is getoets en geoptimeer vir elk van die toepassings. Hierdie verhandeling demonstreer die simulering en eksperimentele resultate van die filter wat aangewend is vir verskeie kragstelseltoepassings. Copyright / Dissertation (MSc)--University of Pretoria, 2010. / Electrical, Electronic and Computer Engineering / unrestricted

The introduction of the private vehicle in urban communities (towns and cities) resulted in numerous urban problems experienced in the developed and developing world. These include, inter alia, economic inefficiency due to traffic congestion; a high mortality rate relevant to vehicle users and non-vehicle users; air & noise pollution and overall poor quality of life for residents. As part of the literature review, it was found that the level of urban problems experienced will intensify and worsen, if sustainable transportation systems were not introduced in urban areas. These predictions were made based on the following three factors: * The increase of the world population – It was predicated that the world population will increase by 2.3 people billion between 2011 and 2050. The total world population is therefore expected to be 9.3 billion in 2050. * The urbanisation rate experienced – It was predicated that the entire world population growth, along with an additional 300 million people, will be absorbed by urban areas between 2011 and 2050. Urban communities will therefore accommodate 6.2 billion people, or 67% of the world population, in 2050. * The level and growth in private vehicle ownership – The developed world consists of a high level of vehicles per 1 000 residents (655 in 2010), but experienced a decline in growth of 0,8% between 2005 and 2010. Contrary to the developed world, the developing world had a low level of vehicle ownership per 1 000 residents (128 in 2010), but experienced an increase of 21.9% between 2005 and 2010. Apart from the above data, the literature review introduced planning theories and international as well as national policies. The three planning theories that were researched each revealed ten principles of sustainable alternative transportation measures for an unsustainable private vehicle orientated urban area. These sustainable measures were used to introduce the option of a sustainable non-motorised transportation system to the demarcated study area. The three planning theories researched were: * The Smart growth theory * New urbanism, and * Pedestrian mall developments. International and national policies were scrutinised to obtain a point-of-view on how different countries, cities, spheres of government and type of documentation addressed non-motorised transportation developments. The examination of the policies also provided insight on how South African spheres of government were addressing non-motorised transportation in South African urban communities, if at all. The international policies include the “Share the road” document compiled by the United Nations in 2010; Mount Rainier Town Centre Urban Renewal Plan (2005) (USA) and Ottawa’s Transport Master Plan (2008) (Canada). The South African policies included the National Non-motorised Transportation Policy (2008); National Transport Master Plan (2011); Northern Cape Provincial Spatial Development Framework (2012) and //Khara Hais Spatial Development Framework (2012) (local municipality). Following the literature review, is an empirical study consisting of 2 sections. Firstly, a pilot study, which consists of international and local examples, was researched. These examples were identified as they consist of vehicle-free areas within the central business district. The success of the vehicle-free developments was measured and the information utilised to guide recommendations for the demarcated study area within the town of Upington (case study). Pilot study examples include Copenhagen, Denmark; Ghent, Belgium; Santa Monica, USA and Cape Town, South Africa. Secondly, a case study was analysed. A study area within the South African town of Upington, Northern Cape Province was demarcated. The status quo of relevant aspects, including but not limited to; the climate, coverage, parking, road hierarchy and transport modes were obtained and analysed. This analysis was conducted in order to establish a) if the study area experienced urban transport related problems and b) if the implementation of a non-motorised transport system will be more sustainable for the general public of Upington, as opposed to the current private-vehicle dependable system. Inputs from Town Planners were also obtained in order to obtain a multi-dimensional point-of-view. In the conclusion of the researched study it was found that a) the planning theories have been successfully implemented in the examples of the pilot studies and therefore these principles could apply to the demarcated study area in Upington. b) International policies addressed non-motorisation developments more comprehensively than the South African policies. Shortages especially existed at the provincial and local spheres of government where implementation should take place. c) Through the analysis of the case study it become evident that the demarcated study area within Upington was burdened by private vehicle orientated transport problems. However, the analysis also indicated that the study area has the potential to make a successful transition from being dependable on unsustainable private vehicles to sustainable non-motorised transportation. Finally, tailor-made recommendations (based on information derived from planning theories, policies, pilot study and case study) were made for the study area situated within Upington. These recommendations include the phased development of a pedestrian-only area, the development of parking garages (outside the pedestrian area), which are linked to the pedestrian-only area and the development of a public transportation system by means of busses. / MArt et Scien (Urban and Regional Planning), North-West University, Potchefstroom Campus, 2014

The introduction of the private vehicle in urban communities (towns and cities) resulted in numerous urban problems experienced in the developed and developing world. These include, inter alia, economic inefficiency due to traffic congestion; a high mortality rate relevant to vehicle users and non-vehicle users; air & noise pollution and overall poor quality of life for residents. As part of the literature review, it was found that the level of urban problems experienced will intensify and worsen, if sustainable transportation systems were not introduced in urban areas. These predictions were made based on the following three factors: * The increase of the world population – It was predicated that the world population will increase by 2.3 people billion between 2011 and 2050. The total world population is therefore expected to be 9.3 billion in 2050. * The urbanisation rate experienced – It was predicated that the entire world population growth, along with an additional 300 million people, will be absorbed by urban areas between 2011 and 2050. Urban communities will therefore accommodate 6.2 billion people, or 67% of the world population, in 2050. * The level and growth in private vehicle ownership – The developed world consists of a high level of vehicles per 1 000 residents (655 in 2010), but experienced a decline in growth of 0,8% between 2005 and 2010. Contrary to the developed world, the developing world had a low level of vehicle ownership per 1 000 residents (128 in 2010), but experienced an increase of 21.9% between 2005 and 2010. Apart from the above data, the literature review introduced planning theories and international as well as national policies. The three planning theories that were researched each revealed ten principles of sustainable alternative transportation measures for an unsustainable private vehicle orientated urban area. These sustainable measures were used to introduce the option of a sustainable non-motorised transportation system to the demarcated study area. The three planning theories researched were: * The Smart growth theory * New urbanism, and * Pedestrian mall developments. International and national policies were scrutinised to obtain a point-of-view on how different countries, cities, spheres of government and type of documentation addressed non-motorised transportation developments. The examination of the policies also provided insight on how South African spheres of government were addressing non-motorised transportation in South African urban communities, if at all. The international policies include the “Share the road” document compiled by the United Nations in 2010; Mount Rainier Town Centre Urban Renewal Plan (2005) (USA) and Ottawa’s Transport Master Plan (2008) (Canada). The South African policies included the National Non-motorised Transportation Policy (2008); National Transport Master Plan (2011); Northern Cape Provincial Spatial Development Framework (2012) and //Khara Hais Spatial Development Framework (2012) (local municipality). Following the literature review, is an empirical study consisting of 2 sections. Firstly, a pilot study, which consists of international and local examples, was researched. These examples were identified as they consist of vehicle-free areas within the central business district. The success of the vehicle-free developments was measured and the information utilised to guide recommendations for the demarcated study area within the town of Upington (case study). Pilot study examples include Copenhagen, Denmark; Ghent, Belgium; Santa Monica, USA and Cape Town, South Africa. Secondly, a case study was analysed. A study area within the South African town of Upington, Northern Cape Province was demarcated. The status quo of relevant aspects, including but not limited to; the climate, coverage, parking, road hierarchy and transport modes were obtained and analysed. This analysis was conducted in order to establish a) if the study area experienced urban transport related problems and b) if the implementation of a non-motorised transport system will be more sustainable for the general public of Upington, as opposed to the current private-vehicle dependable system. Inputs from Town Planners were also obtained in order to obtain a multi-dimensional point-of-view. In the conclusion of the researched study it was found that a) the planning theories have been successfully implemented in the examples of the pilot studies and therefore these principles could apply to the demarcated study area in Upington. b) International policies addressed non-motorisation developments more comprehensively than the South African policies. Shortages especially existed at the provincial and local spheres of government where implementation should take place. c) Through the analysis of the case study it become evident that the demarcated study area within Upington was burdened by private vehicle orientated transport problems. However, the analysis also indicated that the study area has the potential to make a successful transition from being dependable on unsustainable private vehicles to sustainable non-motorised transportation. Finally, tailor-made recommendations (based on information derived from planning theories, policies, pilot study and case study) were made for the study area situated within Upington. These recommendations include the phased development of a pedestrian-only area, the development of parking garages (outside the pedestrian area), which are linked to the pedestrian-only area and the development of a public transportation system by means of busses. / MArt et Scien (Urban and Regional Planning), North-West University, Potchefstroom Campus, 2014

Text in Afrikaans / Die herscomgestelde gesin word in hierdie navorsingstudie ondersoek as 'n kompleksa alternatiewe gesinstruktuur met eiesoortige strukturele kenmerke, probleemarecs en rituele wat nie aan die norm von die kerngesin ontleen kan word nie. In die literotuuroorsig word hierdie aspekte van nader beskou en tot die gevolgtrekking gekom dot die belangrike rol van die eie ouer in die hersoomgestelde gesin grootliks misgekyk word. Die verbondenheid van die eie ouer aan beide die ouer-kind- en die nuwe egpoorsisteme mack ditvir hom/hoar moontlik om 'n sleutelrol te vervul tydens gesinsinteroksies, eenheidsvorming en die opvoedingsgebeure in die hersoamgestelde gesin. Dit is moontlik vir die eie ouer om vanuit 'n unieke posisie as 'n buffer te dien in die problemotiese stiefouer-stiefkindverhoudinge. Hierdie maontlikheid bestaon egter slegs indien die eie ouer oor voldoende kennis, insig en voardighede beskik. 'n Uitgebreide kwalitatiewe ondersoek aan die hand van semi-gestruktureerde onderhoude met die lede van ses hersaamgestelde gesinne het die volgende tendense aan die lig gebring: • Eie overs verwag van nuwe egliede om kinders in die hersaamgestelde gesin uit die staanspoor te aanvoor en lief te he. • Eie overs koester konflikterende gevoelens ten opsigte van die dissiplinering van hul kinders deur die stiefouer. • Eie ouers, sfiefouers en kinders in hersaamgestelde gesinne goon dikwels gebuk onder d\e los van onverwerkte gevoelens van verdriet en verlies. • Die hantering van finansies ten opsigte van inwonende eie en stiefkinders, asook nie-inwonende kinders en vorige egliede skep spanning en bemoeilik goeie verhoudinge. • Eie ouers is dikwels so verdeeld tussen die belange van nul kinders en die van hul nuwe moats dot hulle dit moeilik vind om in 'n tweede huwelik 'n betekenisvolle verhouding met hul nuwe lewensmaat op te bou. Genoemde tendense het 'n bepolende rol gespeel in die ontwikkeling von 'n begeleidingsprogram vir eie ouers. Agt sessies met doelwitte geboseer op hierdie probleemoreas is gestruktureer om die eie ouer met noodsaaklike kennis en vaardighede toe te rus ten opsigte van harmoniese verhoudingstigting en -onderhouding in hersaamgesfelde gesinne. Die begeleidingsprogram is deur middel van 'n fokusgroeponderhoud aan die evaluering von vier ouerpare in hersaamgestelde gesinne onde&Werp en is aon die hand van hul aanbevelings verfyn en gefinaliseer. / Educational Studies / D. Ed.(Psychology of Education)

Many of the sources indicated in this work are classical and not updated due to the fact that the origins of Gestalt Philosophy are found in classical works / Verskeie van die geraadpleegde bronne in die literatuurhoofstukke verteenwoordig klassieke werke wat nie binne die erkende periode vir relevante wetenskaplike navorsing val nie. Die oorsprong van die Gestalt Filosofie wat in hierdie studie benut is, word in hierdie klassieke werke gevind en is ook in hierdie werke geraadpleeg / The Gestalt approach was used as the contextual framework to explore how music can be used as a therapeutic medium in the treatment of the emotionally traumatized child. Music as a sensory experience was used during the therapeutic process with each case study, to facilitate the child's process towards healing. The conceptual framework of music as a therapeutic medium was researched in depth to bring clarity to the influence it has on the emotional well-being of the child. The child who entered into therapy was selected according to specific criteria, with the experience of emotional trauma being priority. The researcher also studied the concept of emotional trauma in depth and the consequences it has on a child's overall functional ability. Music was used as an expressive technique during the therapeutic process with each child. The conclusion drawn from this study indicated that the gestalt approach can be applied effectively in using music as a therapeutic medium in the treatment of the emotionally traumatized child. / Die Gestalt benadering is gebruik in hierdie navorsing ten einde 'n kontekstuele raamwerk daar te stel waarbinne musiek as terapeutiese medium in die behandeling van emosionele trauma in kinders gebruik kon word. Musiek kan beskryf word as 'n sensoriese ervaring. Hierdie sensoriese ervaring is binne die terapeutiese proses toegepas ten einde die kind se herstelproses te fasiliteer. Die studie is binne die navorsingskonteks van gevallestudieprosedures gedoen. Musiek is binne die konseptuele raamwerk bestudeer en nagevors ten einde die terapeutiese waarde daarvan in diepte te ondersoek. Hierdie in-diepte ondersoek het aan die navorser 'n duidelike beeld gegee hoe dit toegepas kon word in terapie. Deur dit toe te pas in terapie is die invloed van musiek op die emosionele welsyn van die getraumatiseerde kind gedokumenteer. Die navorsingskriteria vir insluiting in die ondersoek was gegrond op die literatuurondersoek en het onder meer die belewing van trauma ingesluit. Die belewing van emosionele trauma en invloed op die kind se geheelfunksionering was dus 'n verdere eenheid van ontleding en is in diepte deur die navorser bestudeer. Musiek is dus gebruik as 'n ekspressiewe tegniek tydens die terapeutiese proses met elke gevallestudie. Die gevolgtrekking waartoe in hierdie studie gekom kon word is dat musiek binne die konteks van die gestalt benadering suksesvol in die hantering van emosionele trauma by die kind gebruik kan word. / Practical Theology / M.Diac. (Play Therapy)

Text in Afrikaans / In this study essential guidelines are given to Foundation Phase educators for the teaching of basic English concepts to English second language learners. Die research design is explained and recommendations are made. The following underlying problems, which were encountered in the research recommendation, are identified and discussed: Learning barriers with specific reference to English as a second language. The causes of learning barriers which include the discussion of intrinsic and extrinsic factors. Educator training is lacking and educators do not have the necessary knowledge and skills to teach basic concepts in English to second language learners. The necessity and advantages of timeous identification of barriers to learning to ensure that basic concepts are taught. The study was concluded with practical guidelines to reinforce basic concepts in learners in the Foundation Phase who are taught in English as a second language. Recommendations were made to parents, educators and the Department of Education. / In die studie word riglyne aan Grondslagfase-onderwysers gegee vir die onderrig van basiese konsepte in Engels aan Engels tweedetaalleerders. Hierdie basiese konsepte is noodsaaklik vir vordering in die Grondslagfase. Die navorsingontwerp verduidelik en aanbevelings gemaak. Die volgende sub-probleme wat onderliggend is aan die navorsingsvoorstel is geïdentifiseer en bespreek, naamlik: Struikelblokke tot leer met spesifieke verwysing na Engels as tweedetaal. Die oorsake wat lei tot struikelblokke tot leer waaronder intrinsieke en ekstrinsieke faktore word bespreek. Onderwyseropleiding is onvoldoende en onderwysers beskik nie oor die kennis en vaardighede om basiese konsepte in Engels aan Engels tweedetaalleerders te onderrig nie. Die noodsaaklikheid van vroeë identifisering en die voordele verbonde aan vroegtydige identifisering van struikelblokke tot leer om te verseker dat basiese konsepte voldoende vasgelê word. Die studie is afgesluit met praktiese riglyne vir die vaslegging van basiese konsepte aan leerders in die Grondslagfase wat in Engels as tweede taal onderrig word. Aanbevelings is aan die ouers, onderwysers en die Departement van Onderwys gemaak. / Inclusive Education / M. Ed. (Inklusiewe Onderwys)

Summaries in Afrikaans and English / Text in Afrikaans / In die skripsie word gekyk na die remedies van 'n versekeraar by wanvoorstelling (nie-openbaring) en waarborgbreuk deur 'n versekerde en veral die beperking van die versekeraar se kansellasiereg. Die klem sal egter val op die remedies by waarborgbreuk omdat versekeraars veel meer daarop steun. Die volgende voorstelle word gemaak. 'n Kansellasiereg behoort in die geval van wanvoorstelling (nie-openbaring) nie verleen te word as die versekeraar nogtans, met kennis van die ware feite, sou kontrakteer nie. By verbreking van bevestigende waarborge behoort 'n kansellasiereg toegestaan te word as die waarborgbreuk die betrokke versekeraar se berekening van die risiko redelikerwys geraak het maar nie as die versekeraar nogtans sou kontrakteer nie. By voortdurende waarborge behoort kansellasie beskikbaar te wees as die waarborgbreuk die skade redelikerwys veroorsaak het. 'n Skadevergoedingseis behoort beskikbaar te wees waar 'n versekeraar nie kan of wil kanselleer nie. / The remedies of an insurer, in the event of misrepresentation (non-disclosure) and breach of warranty by an insured are discussed, particularly limiting the insurer's right to cancel. The emphasis is on the remedies applicable to breach of warranty because insurers use these more frequently. The following solutions are suggested. An insurer should not be allowed to cancel in the event of misrepresentation (nondisclosure) if it would still have concluded the contract, knowing the truth. In the event of affirmative warranties a right to cancel should be available if breach of warranty reasonably affected the particular insurer's assessment of the risk, but not if the contract would still have been concluded. In the event of promissory warranties, cancellation should only be available if breach of warranty reasonably caused the loss. A claim for damages should be available if an insurer can not or does not wish to cancel. / Private Law / LL.M.

Summaries in English and Afrikaans / Die hersaamgestelde gesin word in hierdie navorsingstudie ondersoek as in komplekse alternatiewe gesinstruktuur met eiesoortige strukturele kenmerke, probleemareas en rituele wat nie aan die norm van die kerngesin ontleen kan word nie. In die literatuuroorsig word hierdie aspekte van nader beskou en tot die gevolgtrekking gekom dot die belangrike rol van die eie ouer in die hersaamgestelde gesin grootliks misgekyk word. Die verbondenheid van die eie ouer aan beide die ouer-kind- en die nuwe egpaarsisteme maak dit vir hom/haar moontlik om 'n sleutelrol te vervul tydens gesinsinteraksies, eenheidsvorming en die opvoedingsgebeure in die hersaamgestelde gesin. Dit is moontlik vir die eie ouer om vanuit in unieke posisie as 'n buffer te dien in die problematiese stiefouer-stiefkindverhoudinge. Hierdie moontlikheid bestaan egter slegs indien die eie ouer oor voldoende kennis, insig en vaardighede beskik. 'n Uitgebreide kwalitatiewe ondersoek aan die hand van semi-gestruktureerde onderhoude met die lede van ses hersaamgestelde gesinne het die volgende tendense aan die lig gebring Eie ouers verwag van nuwe egliede om kinders in die hersaamgestelde gesin uit die staanspoor te aanvaar en lief te he. Eie ouers koester konflikterende gevoelens ten opsigte van die dissiplinering van hul kinders deur die stiefouer. Eie ouers, stiefouers en kinders in hersaamgestelde gesinne gaan dikwels gebuk onder die las van onverwerkte gevoelens van verdriet en verlies. Die hantering van finansies ten opsigte van inwonende eie en stiefkinders, asook nie-inwonende kinders en vorige egliede skep spanning en bemoeilik goeie verhoudinge. Eie ouers is dikwels so verdeeld tussen die belange van hul kinders en die van hul nuwe maats dat hulle dit moeilik vind om in 'n tweede huwelik 'n betekenisvolle verhouding met hul nuwe lewensmaat op te bou. Genoemde tendense het 'n bepalende rol gespeel in die ontwikkeling van 'n begeleidingsprogram vir eie ouers. Agt sessies met doelwitte gebaseer op hierdie probleemareas is gestruktureer om die eie ouer met noodsaaklike kennis en vaardighede toe te rus ten opsigte van harmoniese verhoudingstigting en -onderhouding in hersaamgestelde gesinne. Die begeleidingsprogram is deur middel van 'n fokusgroeponderhoud aan die evaluering van vier ouerpare in hersaamgestelde gesinne onderwerp en is aan die hand van hul aanbevelings verfyn en gefinaliseer. / In this research study the reconstituted family is investigated as a complex alternative family structure with distinctive structural characteristics, problem areas and rituals which cannot be adopted from the norm of the nuclear family. In the literature survey these aspects are examined closely and the conclusion is drawn that the important role of the biological parent in the reconstituted family is ignored to a large extent. The biological parent's commitment to both the parent-child and new couple systems allows him/her to play a key role in family interactions, unit formation and educational events in the reconstituted family. It is possible for the biological parent to act as a buffer in the problematic stepparent-stepchild relationships from a unique perspective. However, this possibility only exists if the biological parent possesses sufficient knowledge, insight and skills. An extensive qualitative investigation on the basis of semi-structured interviews with members of six reconstituted families revealed the following tendencies: Biological parents expect their new spouses to accept and love children in the reconstituted family from the onset. Biological parents harbour conflicting feelings regarding the disciplining of children by the stepparent. Biological parents, stepparents and children in reconstituted families often still carry the burden of unresolved feelings of sadness and loss. The handling of finances with regard to resident own and stepchildren, as well as non-resident children and former spouses creates tension and compromises good relationships. Biological parents are often so divided between the interests of their own children and those of their new spouses that they find it difficult to build a meaningful relationship with their new spouse in a second marriage. The tendencies mentioned played a decisive role in the development of a guidance programme for biological parents. Eight sessions with aims based on these problem areas were structured to equip biological parents with the necessary knowledge and skills in respect of the development and maintenance of harmonious relationships in reconstituted families. The guidance programme was subjected to the evaluation of four sets of parents in reconstituted families by means of a focus group interview and was refined and finalised on the basis of their recommendations. / Educational Studies / D. Ed. (Sielkundige Opvoedkunde)

Summaries in Afrikaans and English / Text in Afrikaans / In die skripsie word gekyk na die remedies van 'n versekeraar by wanvoorstelling (nie-openbaring) en waarborgbreuk deur 'n versekerde en veral die beperking van die versekeraar se kansellasiereg. Die klem sal egter val op die remedies by waarborgbreuk omdat versekeraars veel meer daarop steun. Die volgende voorstelle word gemaak. 'n Kansellasiereg behoort in die geval van wanvoorstelling (nie-openbaring) nie verleen te word as die versekeraar nogtans, met kennis van die ware feite, sou kontrakteer nie. By verbreking van bevestigende waarborge behoort 'n kansellasiereg toegestaan te word as die waarborgbreuk die betrokke versekeraar se berekening van die risiko redelikerwys geraak het maar nie as die versekeraar nogtans sou kontrakteer nie. By voortdurende waarborge behoort kansellasie beskikbaar te wees as die waarborgbreuk die skade redelikerwys veroorsaak het. 'n Skadevergoedingseis behoort beskikbaar te wees waar 'n versekeraar nie kan of wil kanselleer nie. / The remedies of an insurer, in the event of misrepresentation (non-disclosure) and breach of warranty by an insured are discussed, particularly limiting the insurer's right to cancel. The emphasis is on the remedies applicable to breach of warranty because insurers use these more frequently. The following solutions are suggested. An insurer should not be allowed to cancel in the event of misrepresentation (nondisclosure) if it would still have concluded the contract, knowing the truth. In the event of affirmative warranties a right to cancel should be available if breach of warranty reasonably affected the particular insurer's assessment of the risk, but not if the contract would still have been concluded. In the event of promissory warranties, cancellation should only be available if breach of warranty reasonably caused the loss. A claim for damages should be available if an insurer can not or does not wish to cancel. / Private Law / LL.M.

Rotavirus infection causes gastroenteritis, specifically severe gastroenteritis, affecting children younger than five globally, regardless of hygiene and water quality. Current licensed, live, attenuated vaccines do not contain the G9 genotype, which is a prevalent rotavirus strain circulating in sub-Saharan Africa, a region that carries a high rotavirus disease burden. Rotavirus-like particles (RV-VLPs) is an attractive non-live vaccine candidate, which has shown promising results in animal studies. Previously, dsRNA was extracted from a stool sample containing a South African human G9P[6] neonatal strain, and amplified cDNA using a sequence-independent procedure. The consensus sequence was obtained for the genome segments using 454® pyrosequencing. The insect-cell-codon-optimized genome segments 2 (VP2), 4 (VP4), 6 (VP6) and 9 (VP7) were cloned into a modified pFASTBACquad vector (pFBq). Several combinations of the genome segments were cloned to produce double-layered particles (DLP; pFBqVP2VP6) or triple-layered particles (TLP; pFBqVP2VP6VP7). In the current study, a ΔTLP (pFBqdVP2-VP8*VP6VP7) construct was generated. The first 92 amino acids of VP2 are not necessary for the conformation of recombinant RV-VLPs. The ORF of VP8*, which contains immune important epitopes, was fused to the 5’ end of the dVP2 coding region resulting in a dVP2-VP8* fused protein which was expressed in the presence of VP6 and VP7 to produce ΔTLPs. The Bac-to-Bac® Baculovirus Expression System and Spodoptera frugiperda (Sf) 9 insect cells were used for expression. All the proteins were successfully expressed. VP2, VP6, VP4 and the dVP2-VP8* fused protein were visible on Coomassie stained SDS-PAGE. Expression of VP7 could only be confirmed with western blot analysis. Particle formation, as assessed by transmission electron microscopy (TEM), was observed for DLPs. No TLPs of dVP2-8*/6/7 or VP2/6/7 were visualized due to the lower expression level of VP7 and the lack of calcium supplements during the assembly process. In conclusion, it was possible to produce RV-DLPs derived from the consensus sequence determined for a G9P[6] rotavirus directly from stool without prior propagation in cell culture or virus isolation. This strain contains both the G9 and P[6] genotypes that are currently prevalent in sub-Saharan Africa. / Thesis (MSc (Biochemistry))--North-West University, Potchefstroom Campus, 2013.