Global ETD Search

71	The changing role of the secondary school principal in building sustainable communities Souls, Jacobus Abram 30 November 2005 (has links) The aim of the study was to investigate the changing role of the secondary school principal in building sustainable communities. It is supposed that communities that are not sustainable affect secondary schools. The focus is on how the secondary school principal should go about building, sustaining and uplifting the school community. The direct and indirect involvement of secondary school principals in community issues, could contribute to sustainability within the community, which gradually becomes a reality. The task of the secondary school principal is realised through the results of effective educative teaching and learning practices. Through literature study it was found that the role of the secondary school principal in enhancing sustainable communities would contribute to the upliftment of communities. The qualitative approach was successful in obtaining information about how the changing role of the secondary school principal in building sustainable communities is viewed. Recommendations were made concerning research findings for stakeholders and officials to note. / Educational Studies / M.Ed(Education Management)) Planning Leading Organising Quality control Influential factors Building relationships Sustainable communities Secondary school principal Changing management role 371.20120968 School supervision -- South Africa High school principals -- South Africa Educational leadership -- South Africa Education, Secondary -- South Africa
72	Management of open and distance learning at UNISA : meeting student's needs and expectations Ntuli, Aggrineth Zodwa Sebenzile 04 1900 (has links) No description available. Open distance learning Management functions ODL planning Organising Institutional policies Distance education Distance learners Open learners Learners expectations Technology Accessibility ODL learners autonomy 378.1750968 Distance education -- South Africa Distance education -- Management Open learning -- South Africa Open learning -- Management Education, Higher -- South Africa
73	Biomimetic and autonomic server ensemble orchestration Nakrani, Sunil January 2005 (has links) This thesis addresses orchestration of servers amongst multiple co-hosted internet services such as e-Banking, e-Auction and e-Retail in hosting centres. The hosting paradigm entails levying fees for hosting third party internet services on servers at guaranteed levels of service performance. The orchestration of server ensemble in hosting centres is considered in the context of maximising the hosting centre's revenue over a lengthy time horizon. The inspiration for the server orchestration approach proposed in this thesis is drawn from nature and generally classed as swarm intelligence, specifically, sophisticated collective behaviour of social insects borne out of primitive interactions amongst members of the group to solve problems beyond the capability of individual members. Consequently, the approach is self-organising, adaptive and robust. A new scheme for server ensemble orchestration is introduced in this thesis. This scheme exploits the many similarities between server orchestration in an internet hosting centre and forager allocation in a honeybee (Apis mellifera) colony. The scheme mimics the way a honeybee colony distributes foragers amongst flower patches to maximise nectar influx, to orchestrate servers amongst hosted internet services to maximise revenue. The scheme is extended by further exploiting inherent feedback loops within the colony to introduce self-tuning and energy-aware server ensemble orchestration. In order to evaluate the new server ensemble orchestration scheme, a collection of server ensemble orchestration methods is developed, including a classical technique that relies on past history to make time varying orchestration decisions and two theoretical techniques that omnisciently make optimal time varying orchestration decisions or an optimal static orchestration decision based on complete knowledge of the future. The efficacy of the new biomimetic scheme is assessed in terms of adaptiveness and versatility. The performance study uses representative classes of internet traffic stream behaviour, service user's behaviour, demand intensity, multiple services co-hosting as well as differentiated hosting fee schedule. The biomimetic orchestration scheme is compared with the classical and the theoretical optimal orchestration techniques in terms of revenue stream. This study reveals that the new server ensemble orchestration approach is adaptive in a widely varying external internet environments. The study also highlights the versatility of the biomimetic approach over the classical technique. The self-tuning scheme improves on the original performance. The energy-aware scheme is able to conserve significant energy with minimal revenue performance degradation. The simulation results also indicate that the new scheme is competitive or better than classical and static methods. 621.382
74	Análise das bifurcações de um sistema de dinâmica de populações / Bifurcation analysis of a system for population dynamics Silva, Andre Ricardo Belotto da 16 July 2010 (has links) Nesta dissertação, tratamos do estudo das bifurcações de um modelo bi-dimensional de presa-predador, que estende e aperfeiçoa o sistema de Lotka-Volterra. Tal modelo apresenta cinco parâmetros e uma função resposta não monotônica do tipo Holling IV: $$ \\left\\{\\begin \\dot=x(1-\\lambda x-\\frac{\\alpha x^2+\\beta x +1})\\\\ \\dot=y(-\\delta-\\mu y+\\frac{\\alpha x^2+\\beta x +1}) \\end ight. $$ Estudamos as bifurcações do tipo sela-nó, Hopf, transcrítica, Bogdanov-Takens e Bogdanov-Takens degenerada. O método dos centros organizadores é usado para estudar o comportamento qualitativo do diagrama de bifurcação. / In this work are studied the bifurcations of a bi-dimensional predator-prey model, which extends and improves the Volterra-Lotka system. This model has five parameters and a non-monotonic response function of Holling IV type: $$ \\left\\{\\begin \\dot=x(1-\\lambda x-\\frac{\\alpha x^2+\\beta x +1})\\\\ \\dot=y(-\\delta-\\mu y+\\frac{\\alpha x^2+\\beta x +1}) \\end ight. $$ They studied the sadle-node, Hopf, transcritic, Bogdanov-Takens and degenerate Bogdanov-Takens bifurcations. The method of organising centers is used to study the qualitative behavior of the bifurcation diagram. Bifurcação Bifurcation Bogdanov-Takens Bogdanov-Takens Bogdanov-Takens degenerado Centros organizadores Degenerate Bogdanov-Takens Elíptica-nilpotente Foco-nilpotente Função resposta Holling IV Holling IV response funciton Hopf Hopf Lotka-Volterra Lotka-Volterra Nilpotent eliptic Nilpotent focus Organising centers Predador-presa Predator-prey
75	Understanding spatial patterns of land-system change in Europe Levers, Christian 27 April 2016 (has links) Die Nutzung von terrestrischen Ökosystemen zur Befriedigung der Grundbedürfnisse der Menschheit hat tiefgreifende Auswirkungen auf das Erdsystem und führte zur Ausprägung von anthropogen dominierten Landsystemen. Diese sind von hoher Komplexität, da sie aus einer Vielzahl von unterschiedlichsten Einflussfaktoren angetriebenen Landnutzungsveränderungen hervorgegangen sind. Aktuelle Forderungen nach einer nachhaltigen zukünftigen Landnutzung erfordern ein fundiertes und integratives Verständnis dieser Komplexität. Das Hauptziel dieser Arbeit ist es, ein besseres Verständnis der raum-zeitlichen Muster und Determinanten des Landsystemwandels, insbesondere der Landnutzungsintensität, in Europa zwischen 1990 und 2010 zu erlangen. Europa ist ein interessantes Studiengebiet, da es jüngst starke Landnutzungsveränderungen erlebte und seine Heterogenität zu einer Vielfalt von Landsystemen und Landsystemveränderungen führte. Das Ziel der Arbeit wurde durch (i) die Kartierung von Intensitätsmustern und deren Veränderungen in Forst- und Agrarsystemen sowie der Ermittlung der dafür einflussreichsten räumlichen Determinanten und (ii) die Kartierung und Charakterisierung archetypischer Muster und Entwicklungsverläufe von Landsystemen untersucht. Die Ergebnisse dieser Arbeit zeigten einen deutlichen Ost-West-Unterschied in Landsystemmustern und -veränderungen in Europa, mit intensiv genutzten und intensivierenden Regionen vor allem in Westeuropa. Dennoch wurde Europa vor allem durch relativ stabile Landsystemmuster gekennzeichnet und (De-)Intensivierungstrends waren nur von untergeordneter Bedeutung. Intensitätsmuster und -veränderungen waren stark an Standortbedingungen gebunden, vor allem an edaphische, klimatische, und länderspezifische Besonderheiten. Diese Arbeit erweitert das Verständnis des Landsystemwandels in Europa und kann zur Entwicklung wissenschaftlicher und politikbezogener Maßnahmen sowie zur Erreichung einer nachhaltigeren Landnutzung in Europa beitragen. / The utilisation of terrestrial ecosystems to satisfy the basic needs of humankind has profound impacts on the Earth System and led to the development of human-dominated land systems. These are substantially complex as they evolved from a multitude of land-change pathways driven by a variety of influential factors. Current calls for a more sustainable future land-use require a sound and integrative understanding of this complexity. The main goal of this thesis is to better understand the spatio-temporal patterns and the determinants of land-system change in Europe between 1990 and 2010, especially with regard to land-use intensity. Europe serves as an interesting study region as it recently experienced a period of marked land-use change, and since its large environmental, political, and socio-economic heterogeneity resulted in a diversity of land systems and land-change pathways. Land-system changes in Europe were examined by (i) mapping patterns and changes in forestry and agricultural intensity and identifying the most influential spatial determinants related to these changes, and (ii) mapping and characterising archetypical patterns and trajectories of land systems considering both land-use extent and intensity indicators. Results revealed a distinct east-west divide in Europe’s land-system patterns and change trajectories, with intensively used and intensifying regions particularly located in Western Europe. However, Europe was mainly characterised by relatively stable land-systems patterns with (de-) intensification trends being only of minor importance. Land-use intensity levels and changes were strongly related to site conditions, especially with regard to soil and climate, as well as to country-specific characteristics. By fostering the understanding of land-system change, this thesis has the potential to contribute to scientific and policy-related actions that address current efforts to guide future land systems in Europe to a more sustainable use. Europa Forstwirtschaft Landnutzungsintensität Landnutzungswandel Landsystemwissenschaften Landsystemwandel Agrarwirtschaft räumliche Modellierung algorithmische Modellierung boosted regression trees Paneldatenanalyse Selbstorganisierende Karten agriculture forestry Europe land-system science land-system change land-use change land-use intensity spatial modelling algorithmic modelling boosted regression trees panel regressions self-organising maps 550 Geowissenschaften 31 Geowissenschaften AR 27100 RC 10663 ddc:550
76	Organiseringsprocesser i ett popband : bakom kulisser och mellan människor / Processes of organizing in a pop band Malm, Tobias January 2015 (has links) Det finns ett gap mellan tanke och handling i mindre organisationer. Omedvetenhet om den egna verksamheten har lett till att både lyckad och misslyckad organisering getts missvisande förklaringar. Studiens syfte är därför att utveckla kunskap om och förståelse för organiseringsprocesser i mindre organisationer och specifikt i popband. Forskningsdesignen är en longitudinell fallstudie av ett popband. Metodologin har inspirerats av etnografi och har en abduktiv ansats. Den huvudsakliga datainsamlingstekniken har varit observation av chattande, men direkta observationer, intervjuer och reflektionsmöte har också genomförts. Resultaten visar hur popbandet organiseras i projekt och på vikten av komplexitet och den gemensamma mening som det kan skapa. Stöd har tagits i Czarniawskas organiseringsteori och Weicks teori om meningsskapande. Slutsatsen dras att ihållande och sammanhängande organiseringsprocesser är förbundna med kollektiva meningsprocesser. Strävan efter gemensam mening är en strävan efter att förverkliga organisationen som ett kollektiv. Implikationerna för välfungerande verksamhet i mindre organisationer föreslås vara att sträva efter komplexitet genom att involvera alla deltagares mest meningsfulla projekt i varandra, att schemalägga träffar och att sätta multipla deadlines, samt att undvika enväldigt ledarskap, att undvika konkurrerande kompiskollektiv, att undvika delegering och tilldelning av ansvarsområden och att undvika strävan efter en gemensam syn på verksamheten. / There is a gap between thought and action in smaller organizations. Unawareness of its own activities has led to misleading explanations for both successful and unsuccessful organizing. This study therefore aims to develop knowledge and understanding of processes of organizing in smaller organizations and specifically in pop bands. The research design is a longitudinal case study of a pop band. The methodology was inspired by ethnography and has an abductive approach. The main source for data collection has been observation of chatting, however direct observations, interviews and a meeting of stimulated recall has also been conducted. The results show how the pop band is organized in projects and the importance of complexity and the collective sense that it can make. Analysis is based on Czarniawska's theory of organizing and Weick's theory of sensemaking. It is concluded that sustained and coherent processes of organizing are associated with processes of collective sensemaking. An endeavor for collective sense is an endeavor to realize the organization as a collective. The implications for well-functioning activities in smaller organizations proposed to be to endeavor for complexity by involving the most sensible projects according to all participants into one another, and to schedule meetings and to have multiple deadlines, and avoid authoritarian leadership, avoid competing buddy collective, avoid delegation and allocation of areas of responsibility and avoid the pursuit of a common view. organizing organising band sensemaking education pedagogy pop rock organisational organizational project czarniawska weick microorganization microorganisation chat chatting observation casestudy case study organisation organization popband rockband musicgroup music group processes complexity meaning organisering band meningsskapande pedagogik popband rockband pop rock organisation organisatorisk samordning projekt organisationspedagogik czarniawska weick meningskapande musikgrupp mikroorganisation chatt chattande chattobservation observation fallstudie organiseringsprocesser processer meningsprocesser komplexitet mening
77	The changing role of the secondary school principal in building sustainable communities Souls, Jacobus Abram 30 November 2005 (has links) The aim of the study was to investigate the changing role of the secondary school principal in building sustainable communities. It is supposed that communities that are not sustainable affect secondary schools. The focus is on how the secondary school principal should go about building, sustaining and uplifting the school community. The direct and indirect involvement of secondary school principals in community issues, could contribute to sustainability within the community, which gradually becomes a reality. The task of the secondary school principal is realised through the results of effective educative teaching and learning practices. Through literature study it was found that the role of the secondary school principal in enhancing sustainable communities would contribute to the upliftment of communities. The qualitative approach was successful in obtaining information about how the changing role of the secondary school principal in building sustainable communities is viewed. Recommendations were made concerning research findings for stakeholders and officials to note. / Educational Studies / M.Ed(Education Management)) Planning Leading Organising Quality control Influential factors Building relationships Sustainable communities Secondary school principal Changing management role 371.20120968 School supervision -- South Africa High school principals -- South Africa Educational leadership -- South Africa Education, Secondary -- South Africa
78	Management of open and distance learning at UNISA : meeting student's needs and expectations / Managing open and distance learning in higher education : aligning students' needs and expectations with institutional requirements Ntuli, Aggrineth Zodwa Sebenzile 04 1900 (has links) Educational Leadership and Management / M. Ed (Educational Management) Open distance learning Management functions ODL planning Organising Institutional policies Distance education Distance learners Open learners Learners expectations Technology Accessibility ODL learners autonomy 378.1750968 Distance education -- South Africa Distance education -- Management Open learning -- South Africa Open learning -- Management Education, Higher -- South Africa
79	Análise das bifurcações de um sistema de dinâmica de populações / Bifurcation analysis of a system for population dynamics Andre Ricardo Belotto da Silva 16 July 2010 (has links) Nesta dissertação, tratamos do estudo das bifurcações de um modelo bi-dimensional de presa-predador, que estende e aperfeiçoa o sistema de Lotka-Volterra. Tal modelo apresenta cinco parâmetros e uma função resposta não monotônica do tipo Holling IV: $$ \\left\\{\\begin \\dot=x(1-\\lambda x-\\frac{\\alpha x^2+\\beta x +1})\\\\ \\dot=y(-\\delta-\\mu y+\\frac{\\alpha x^2+\\beta x +1}) \\end ight. $$ Estudamos as bifurcações do tipo sela-nó, Hopf, transcrítica, Bogdanov-Takens e Bogdanov-Takens degenerada. O método dos centros organizadores é usado para estudar o comportamento qualitativo do diagrama de bifurcação. / In this work are studied the bifurcations of a bi-dimensional predator-prey model, which extends and improves the Volterra-Lotka system. This model has five parameters and a non-monotonic response function of Holling IV type: $$ \\left\\{\\begin \\dot=x(1-\\lambda x-\\frac{\\alpha x^2+\\beta x +1})\\\\ \\dot=y(-\\delta-\\mu y+\\frac{\\alpha x^2+\\beta x +1}) \\end ight. $$ They studied the sadle-node, Hopf, transcritic, Bogdanov-Takens and degenerate Bogdanov-Takens bifurcations. The method of organising centers is used to study the qualitative behavior of the bifurcation diagram. Bifurcação Bogdanov-Takens Bogdanov-Takens degenerado Centros organizadores Elíptica-nilpotente Foco-nilpotente Função resposta Holling IV Hopf Lotka-Volterra Predador-presa Bifurcation Bogdanov-Takens Degenerate Bogdanov-Takens Holling IV response funciton Hopf Lotka-Volterra Nilpotent eliptic Nilpotent focus Organising centers Predator-prey
80	The role of governance structures, ownership models and organising models in mitigating corporate governance problems of state-owned enterprises Adebayo, Adeyemi 01 1900 (has links) Many of the countries all over the world, with different experiences, own state-owned enterprises (SOEs). Even though these enterprises are useful socioeconomic policy instruments, evidence from most of these countries shows that these enterprises do not fulfil their mandates, especially when wholly owned, and in developing and corrupt countries. As a result, owning SOEs has become a trend rather than a means to an end. Several models, from privatisation, then back to renationalisation, have been attempted in mitigating the numerous problems of these enterprises. These models did not mitigate the problems of SOEs as they were, in summary, mere models backed by powerful advocates and favoured by the turn of socio-political and economic cycles at that time. However, irrespective of the numerous problems of SOEs, these enterprises can still be useful socioeconomic policy instruments now, as in the past. Using multiphase exploratory mixed methods, this thesis explores ways of mitigating the problems of SOEs by developing a best practice structural corporate governance model that takes into account various aspects of corporate governance of SOEs. In this context, the empirical part of this study was conducted in three phases. The first phase analyses the contents of relevant enterprises’ documents. The second phase analyses survey responses from purposively selected expert respondents from sample SOEs. The third phase analyses interviews from purposively selected expert participants from sample SOEs. Thus, this thesis determined the problems of SOEs, detailed the problem implications, identified contingent areas of the models considered vis a vis problems explored, extended the role of government, developed a conceptual framework, established useful models for organising and owning SOEs as a way of mitigating the identified problems, analysed the thesis statement and thesis propositions and developed a structural corporate governance model for SOEs. The study found that the holding company model, both wholly and partly owned, appears to be better in mitigating corporate governance problems of SOEs, compared with the traditional wholly and partly owned models, with the partly owned model of the holding company model a better model compared with the other models. Thus, this thesis harnesses the stages detailed above into contributing to the field of scholarly knowledge by harnessing the stages described into developing a structural corporate governance model that takes into account relevant aspects of corporate governance of SOEs and related enterprises. Following this, this thesis proposes that, in addition to emulating the developed model, establishing a supervisory board that constitutes representatives from public and private role players, as well as other external assurance providers and regulatory inspectors is key in mitigating problems of SOEs, especially in developing countries. This thesis contributes to the field of scholarly knowledge by synthesising disjointed literature on public entrepreneurship, developing and demonstrating a theoretical comparative sampling method, extending the role of government, theoretically developing a conceptual framework, dimensional theory, as well as developing a structural corporate governance model. / Business Management / D. Phil. (Accounting Sciences) Corporate governance Corporate governance model Government-linked companies Government role Organising models Ownership models Private-owned enterprises Singapore South Africa State-owned enterprises Transaction cost economics 352.22250968 Corporate governance -- South Africa Government corporations -- South Africa

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