The third-generation advanced high strength steels, AHSS, represent an opportunity for today’s steel development, where lighter materials with maintained strength and toughness are in demand. The unique properties of these materials often stem from a tailored microstructure. In the continued development of these steels, without relying on expensive alloying methods, process design in the form of precise heat treatments plays an increasingly important role. This work focuses on Medium Mn AHSS with the aim of investigating one of these heat treatments, intercritical annealing, which is essential for achieving the desired material properties. Experimental testing of annealing effects is acknowledged to be a challenging process, and this study aims to present a novel approach for these types of tests. During experimental testing of intercritical annealing, the thermomechanical testing system Gleeble 3800 is a recognized tool. The mounting technique employed in the Gleeble results in an inhomogeneous heat distribution in the samples, generating a thermal gradient. This report aims to utilize this gradient as an opportunity to test the effect of several intercritical annealing temperatures on one sample, thereby increasing the efficiency of experimental work. The method is based on data retrieved from thermocouples attached to the specimen during Gleeble trials with the intent to identify the thermal gradient. This data is combined with x-ray diffraction measurements where the retained austenite fraction is measured. Thermodynamic calculations of expected retained austenite fraction following intercritical annealing are performed parallel to experimental work. The results of this work show that it is possible to utilize the thermal gradient to retrieve extensive data regarding the effect of intercritical annealing using only one sample. The results show a distinct thermal gradient and a corresponding gradient of retained austenite fraction along the specimen. The results for retained austenite fraction at room temperature can be rationalized on the basis of computational predictions. These variations potentially arise due to the material not reaching equilibrium within the annealing timeframe. This conclusion is supported by other computational results concerning austenite composition. In summary, the present work illustrates a new approach streamlining experimental work that, with some refinements, has the potential to benefit the broader scienitific community, in addition to providing a powerful new tool for rapid technological advancement in the steel industry / Tredje generationens avancerade höghållfasta stål representerar en möjlighet för dagens stålutveckling där lättare material med bibehållen styrka och seghet efterfrågas. De unika egenskaperna hos dessa material härrör ofta frän en skräddarsydd mikrostruktur. Vid fortsatt utveckling av dessa stål är det önskvärt att minimera användningen av legeringsämnen, vilket betyder att processdesign i form av korrekta värmebehandlingar blir  av  stor  betydelse.  Detta  arbete  fokuserar  på  Medium  Mn  avancerade höghållfasta stål med syftet att undersöka en av dessa värmebehandlingar, interkritisk glödgning,  vilken  har  en  avgörande  betydelse  för  att  uppnå önskad  prestanda. Experimentell  testning  av  glödgningseffekter  anses  vara  en  utmanande  process och avsikten med denna studie är att presentera ett nytt tillvägagångssätt för denna typ av test. Under experimentell utvärdering av glödgningseffekter används ofta det termomekaniska testsystemet  Gleeble  3800.  Provmonteringen  i  Gleeblen  resulterar i en  inhomogen värmefördelning i proverna vilket medför en temperaturgradient. Denna rapport syftar till att använda gradienten som en möjlighet att testa effekten av flera  glödgningstemperaturer  på  ett  enda  prov  och  därigenom  öka  effektiviteten i det  experimentella  arbetet.  Metoden  grundas  på  data  från  termoelement  fästa  på provet under Gleebleförsök, med avsikt att identifiera den termiska gradienten. Denna data kombineras sedan med XRD-mätningar där austenitfraktion efter värmebehandling utvärderas.  Termodynamiska  beräkningar  av  förväntad  austenitfraktion  efter interkritisk glödgning genomförs parallellt med experimentellt arbete. Resultaten  från  detta  arbete  påvisar  att  den  presenterade  metoden  är  genomförbar då omfattande data gällande interkritisk glödgningseffekt grundat på endast ett prov erhålls. Resultaten visar en tydlig termisk gradient och en motsvarande gradient av austenitfraktion längs provet, vilka är i överensstämmelse med tidigare experimentella resultat för samma material. Resultaten för austenitfraktion vid rumstemperatur uppvisar  betydande  likheter  med  de  termodymiska  beräkningarna, med  några  undantag. Orsaken till dessa variationer ¨ar troligen en otillräcklig glödgningstid, vilket gör att  materialet  inte  når  jämvikt.  Denna  hypotes  stöds  av andra  beräkningsresultat gällande austenitens sammansättning. Sammanfattningsvis presenterar denna rapport ett nytt tillvägagångssätt för att effektivisera experimentellt arbete, som med vissa förbättringar har potential att gynna det bredare forskarsamhället.

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<p>Stars form in clusters amidst complex and coupled physical phenomena. Among the most important of these is radiative feedback, which heats the surrounding gas to suppress the formation of many low-mass stars. In simulations of star formation, pre-main-sequence modeling has often been neglected and stars are assumed to have the radii and luminosities of zero-age main sequence stars. We challenge this approach by developing and integrating a one-zone protostellar evolution model for FLASH and using it to regulate the radiation output of forming stars. The impact of accurate pre-main-sequence models is less ionizing radiation and less heating during the early stages of star formation. For stars modeled in isolation, the effect of protostellar modeling resulted in ultracompact HII regions that formed slower than in the ZAMS case, but also responded to transitions in the star itself. The HII region was seen to collapse and subsequently be rebuilt as the star underwent a swelling of its radius in response to changes in stellar structure and nuclear burning. This is an important effect that has been missed in previous simulations. It implies that observed variations in HII regions may signal changes in the stars themselves, if these variation can be disentangled from other environmental effects seen in the chaotic cluster environment.</p> / Master of Science (MSc)

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This critical exploratory study investigates the perceptions and practices of Norwegian lecturers on the implementation of a policy of English as a Medium of Instruction (EMI) at their Higher Education Institution (HEI). It focuses on their attitudes towards English usage, how they have been prepared and cope in the classroom, and looks at their language and pedagogic competences. The socio-cultural context of using English inside and outside the auditorium is explored and leads to questions of Anglo/American influence and Norwegian domain loss. The study is informed by critical Applied Linguistics (CALx), linguistic imperialism and Bourdieu’s theories on social capital and power. It examines teaching through critical pedagogy and Vygotsky’s socio-cultural theory of learning to aid understanding of classroom engagement and communication, and successful learning. This study has been informed by the critical approach to challenge normative assumptions of the use of EMI. Qualitative methods were used to collect data; twenty Norwegian teaching academics were interviewed, of whom five were observed whilst teaching. Careful coding and analysis of the data revealed surprising attitudes and perceptions varying from enthusiasm to anxiety for EMI. The participants generally accepted the top-down decision making by the administration on the increase of EMI and English usage. The influences of globalisation and commodification at HEIs combined with the rapid increase in English usage seem to have led to increased power of the management and bureaucratization. Some participants, mostly from the humanities, felt they lacked voice and agency in the implementation and their preparation for EMI, whilst some from the sciences actively embraced English and some wanted English as the working language in HEIs. There was a general feeling that more time and language resources were needed for professional development to cope with the change to EMI. All the participants worked hard to succeed in EMI; they were aiming at NS language competencies and wanted to be better at grammar, pronunciation and terminology, but seemed unaware of the pragmatic level of communication required for teaching and did not recognise the necessity of pedagogic training for EMI. There was a lack of dialogic teaching making co-constructed learning challenging and transformative pedagogy more difficult to achieve. They adapted to the multi-cultural/lingual classroom in a pragmatic manner, but were not given spaces for counter-pedagogies, critical pedagogy and the ideals of the transformative intellectual. The research reveals five areas of concern: a) inadequate English language at the pragmatic level for the demands of EMI, b) inadequate pedagogic skills for the multi-lingual and cultural classroom, c) concern over local and international students’ level of English, d) standardized, Anglo/American teaching materials leading to a lack of diversity and critical approaches, and e) the threat to academic Norwegian from international academics not learning Norwegian, the publishing reward system at Norwegian HEIs and the perceived status of English, and the resultant decline in dissemination to the general public. However juxtaposed to the above points, most participants experienced the international classroom positively and were well-received by and pleased to be in their academic Community of Practice resulting generally in an ambivalent attitude to EMI.

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Family businesses have unique dynamics and success stories but at the same time face unique challenges. Intergenerational small and medium-sized family businesses in South Africa play an increasingly important role in creating jobs together with wealth distribution. This study attempts to explore the complicated relationship and inimitable characteristics of family business surroundings against the added challenges of family business perceived success and family business continuity. Notwithstanding family businesses being a prevalent phenomenon in the economies of most countries, insight into this form of enterprise is still limited. Topics such as commitment, entrepreneurial orientation, job satisfaction, satisfaction with life and perceived success of the family business, among others, were investigated. In order to achieve the primary objective of this study, a survey was undertaken using a structured questionnaire. The reliability of the questionnaire was determined by calculating the Cronbach alpha coefficient, which indicated that the questionnaire used in this study conformed to the criteria of acceptable reliability and can be regarded as internally consistent. The survey yielded 143 usable questionnaires from 42 family businesses restricted to Gauteng province and the North West province in South Africa. The nature of this study was investigative and descriptive statistics was therefore used to analyse the statements of all the participating respondents. The selected determinants influencing the perceived success of small and medium-sized family business was then measured and regressional analyses were further conducted. Conclusions were drawn from this study on the outcomes of the selected factors influencing the perceived success of small and medium-sized family business. Finally, a critical evaluation was done and practical recommendations are suggested to improve family business wellness and, subsequently, increase the sustainability of such business. / MBA, North-West University, Potchefstroom Campus, 2015

The primary objective of the study was to determine the business success factors for the second-hand motor vehicle industry in the Vaal Triangle. This kind of study has never been conducted before within the Vaal Triangle and it is therefore intended to contribute to the body of knowledge within the field of entrepreneurship. A questionnaire was designed and distributed to dealerships within the Vaal Triangle region, and it was administered by the researcher. There are one hundred and twenty three (123) dealerships in the Vaal Triangle and fifty eight (58) participated in the study. The demographics of the study revealed that males dominate car dealerships as compared to females, and also that Whites and Indians are the dominating races. Most participants are relatively young, i.e. less than 35 years and also the majority of dealerships are less than 15 years old. Furthermore, the study found that participants preferred starting a business from their pockets rather than going to the bank or government institutions such as IDC or NEF for funding. There was no significant difference in opinion between males and females. There were, however, medium to large differences in opinion between owner, manager and sales executive on some of the entrepreneurial constructs, for example, customer services and SME characteristics. The study concluded that business success factors for the second-hand car industry in the Vaal Triangle region are (ranked from highest to lowest): Entrepreneurial competences, Marketing of the dealership, Dealership location, Product and Customer services, Characteristics of the Small Medium Enterprise and lastly, Resources and funding of the business. Based on the results of the analysis and discussions, practical recommendations are made which will assist in improving the knowledge in the field of entrepreneurship within the car industry. / MBA (Business Administration), North-West University, Potchefstroom Campus, 2015

The objective of this study is to assess the role that succession planning plays in family businesses in the Sedibeng region of the Gauteng province in South Africa. According to Netsiande (2008:1) family businesses should anticipate, recognise, understand and work pro-actively on issues, learn from other businesses and find their own unique solution.to ensure sustainability. Management succession and succession planning is very important and it has a significant impact on family members, society and the business and economic sectors. This research study was conducted by means of a literature and empirical study. The aim of the literature studies was to gain insight into family businesses and the importance of succession planning. Topics covered in the literature study on family businesses includes a definition of family businesses, family business success, uniqueness of family businesses, characteristics of successful family businesses, advantages and disadvantages of family businesses, challenges facing family businesses. Topics covered in the literature study on succession planning includes a definition of succession, the importance of succession in family businesses, factors that influence succession, succession planning, selecting and choosing a successor as well as mentoring and preparation of the successor(s). The study was concluded on the basis of the findings of the empirical study, that the aspects that needs more attention to help with successful succession planning in family businesses in the Sedibeng district of the Gauteng province in South Africa, are the relationship between owner-manager and successor(s), willingness of the successor(s) to take over the business, willingness of the successor(s) to hand over the business and the preparation level of the successor(s). Lastly practical recommendations were suggested to support the family and the business to effectively manage succession planning in family businesses. / MBA (Business Administration), North-West University, Potchefstroom Campus, 2015

Family businesses have unique dynamics and success stories but at the same time face unique challenges. Intergenerational small and medium-sized family businesses in South Africa play an increasingly important role in creating jobs together with wealth distribution. This study attempts to explore the complicated relationship and inimitable characteristics of family business surroundings against the added challenges of family business perceived success and family business continuity. Notwithstanding family businesses being a prevalent phenomenon in the economies of most countries, insight into this form of enterprise is still limited. Topics such as commitment, entrepreneurial orientation, job satisfaction, satisfaction with life and perceived success of the family business, among others, were investigated. In order to achieve the primary objective of this study, a survey was undertaken using a structured questionnaire. The reliability of the questionnaire was determined by calculating the Cronbach alpha coefficient, which indicated that the questionnaire used in this study conformed to the criteria of acceptable reliability and can be regarded as internally consistent. The survey yielded 143 usable questionnaires from 42 family businesses restricted to Gauteng province and the North West province in South Africa. The nature of this study was investigative and descriptive statistics was therefore used to analyse the statements of all the participating respondents. The selected determinants influencing the perceived success of small and medium-sized family business was then measured and regressional analyses were further conducted. Conclusions were drawn from this study on the outcomes of the selected factors influencing the perceived success of small and medium-sized family business. Finally, a critical evaluation was done and practical recommendations are suggested to improve family business wellness and, subsequently, increase the sustainability of such business. / MBA, North-West University, Potchefstroom Campus, 2015