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The Global ETD Search service is a free service for researchers
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 991 to 997 of 997 (0.011 seconds)| 991 |
Modelling of input data uncertainty based on random set theory for evaluation of the financial feasibility for hydropower projects / Modellierung unscharfer Eingabeparameter zur Wirtschaftlichkeitsuntersuchung von Wasserkraftprojekten basierend auf Random Set TheorieBeisler, Matthias Werner 24 August 2011 (has links) (PDF)
The design of hydropower projects requires a comprehensive planning process in order to achieve the objective to maximise exploitation of the existing hydropower potential as well as future revenues of the plant. For this purpose and to satisfy approval requirements for a complex hydropower development, it is imperative at planning stage, that the conceptual development contemplates a wide range of influencing design factors and ensures appropriate consideration of all related aspects.
Since the majority of technical and economical parameters that are required for detailed and final design cannot be precisely determined at early planning stages, crucial design parameters such as design discharge and hydraulic head have to be examined through an extensive optimisation process.
One disadvantage inherent to commonly used deterministic analysis is the lack of objectivity for the selection of input parameters. Moreover, it cannot be ensured that the entire existing parameter ranges and all possible parameter combinations are covered.
Probabilistic methods utilise discrete probability distributions or parameter input ranges to cover the entire range of uncertainties resulting from an information deficit during the planning phase and integrate them into the optimisation by means of an alternative calculation method.
The investigated method assists with the mathematical assessment and integration of uncertainties into the rational economic appraisal of complex infrastructure projects. The assessment includes an exemplary verification to what extent the Random Set Theory can be utilised for the determination of input parameters that are relevant for the optimisation of hydropower projects and evaluates possible improvements with respect to accuracy and suitability of the calculated results. / Die Auslegung von Wasserkraftanlagen stellt einen komplexen Planungsablauf dar, mit dem Ziel das vorhandene Wasserkraftpotential möglichst vollständig zu nutzen und künftige, wirtschaftliche Erträge der Kraftanlage zu maximieren. Um dies zu erreichen und gleichzeitig die Genehmigungsfähigkeit eines komplexen Wasserkraftprojektes zu gewährleisten, besteht hierbei die zwingende Notwendigkeit eine Vielzahl für die Konzepterstellung relevanter Einflussfaktoren zu erfassen und in der Projektplanungsphase hinreichend zu berücksichtigen.
In frühen Planungsstadien kann ein Großteil der für die Detailplanung entscheidenden, technischen und wirtschaftlichen Parameter meist nicht exakt bestimmt werden, wodurch maßgebende Designparameter der Wasserkraftanlage, wie Durchfluss und Fallhöhe, einen umfangreichen Optimierungsprozess durchlaufen müssen.
Ein Nachteil gebräuchlicher, deterministischer Berechnungsansätze besteht in der zumeist unzureichenden Objektivität bei der Bestimmung der Eingangsparameter, sowie der Tatsache, dass die Erfassung der Parameter in ihrer gesamten Streubreite und sämtlichen, maßgeblichen Parameterkombinationen nicht sichergestellt werden kann.
Probabilistische Verfahren verwenden Eingangsparameter in ihrer statistischen Verteilung bzw. in Form von Bandbreiten, mit dem Ziel, Unsicherheiten, die sich aus dem in der Planungsphase unausweichlichen Informationsdefizit ergeben, durch Anwendung einer alternativen Berechnungsmethode mathematisch zu erfassen und in die Berechnung einzubeziehen.
Die untersuchte Vorgehensweise trägt dazu bei, aus einem Informationsdefizit resultierende Unschärfen bei der wirtschaftlichen Beurteilung komplexer Infrastrukturprojekte objektiv bzw. mathematisch zu erfassen und in den Planungsprozess einzubeziehen. Es erfolgt eine Beurteilung und beispielhafte Überprüfung, inwiefern die Random Set Methode bei Bestimmung der für den Optimierungsprozess von Wasserkraftanlagen relevanten Eingangsgrößen Anwendung finden kann und in wieweit sich hieraus Verbesserungen hinsichtlich Genauigkeit und Aussagekraft der Berechnungsergebnisse ergeben.
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Modelling of input data uncertainty based on random set theory for evaluation of the financial feasibility for hydropower projectsBeisler, Matthias Werner 25 May 2011 (has links)
The design of hydropower projects requires a comprehensive planning process in order to achieve the objective to maximise exploitation of the existing hydropower potential as well as future revenues of the plant. For this purpose and to satisfy approval requirements for a complex hydropower development, it is imperative at planning stage, that the conceptual development contemplates a wide range of influencing design factors and ensures appropriate consideration of all related aspects.
Since the majority of technical and economical parameters that are required for detailed and final design cannot be precisely determined at early planning stages, crucial design parameters such as design discharge and hydraulic head have to be examined through an extensive optimisation process.
One disadvantage inherent to commonly used deterministic analysis is the lack of objectivity for the selection of input parameters. Moreover, it cannot be ensured that the entire existing parameter ranges and all possible parameter combinations are covered.
Probabilistic methods utilise discrete probability distributions or parameter input ranges to cover the entire range of uncertainties resulting from an information deficit during the planning phase and integrate them into the optimisation by means of an alternative calculation method.
The investigated method assists with the mathematical assessment and integration of uncertainties into the rational economic appraisal of complex infrastructure projects. The assessment includes an exemplary verification to what extent the Random Set Theory can be utilised for the determination of input parameters that are relevant for the optimisation of hydropower projects and evaluates possible improvements with respect to accuracy and suitability of the calculated results. / Die Auslegung von Wasserkraftanlagen stellt einen komplexen Planungsablauf dar, mit dem Ziel das vorhandene Wasserkraftpotential möglichst vollständig zu nutzen und künftige, wirtschaftliche Erträge der Kraftanlage zu maximieren. Um dies zu erreichen und gleichzeitig die Genehmigungsfähigkeit eines komplexen Wasserkraftprojektes zu gewährleisten, besteht hierbei die zwingende Notwendigkeit eine Vielzahl für die Konzepterstellung relevanter Einflussfaktoren zu erfassen und in der Projektplanungsphase hinreichend zu berücksichtigen.
In frühen Planungsstadien kann ein Großteil der für die Detailplanung entscheidenden, technischen und wirtschaftlichen Parameter meist nicht exakt bestimmt werden, wodurch maßgebende Designparameter der Wasserkraftanlage, wie Durchfluss und Fallhöhe, einen umfangreichen Optimierungsprozess durchlaufen müssen.
Ein Nachteil gebräuchlicher, deterministischer Berechnungsansätze besteht in der zumeist unzureichenden Objektivität bei der Bestimmung der Eingangsparameter, sowie der Tatsache, dass die Erfassung der Parameter in ihrer gesamten Streubreite und sämtlichen, maßgeblichen Parameterkombinationen nicht sichergestellt werden kann.
Probabilistische Verfahren verwenden Eingangsparameter in ihrer statistischen Verteilung bzw. in Form von Bandbreiten, mit dem Ziel, Unsicherheiten, die sich aus dem in der Planungsphase unausweichlichen Informationsdefizit ergeben, durch Anwendung einer alternativen Berechnungsmethode mathematisch zu erfassen und in die Berechnung einzubeziehen.
Die untersuchte Vorgehensweise trägt dazu bei, aus einem Informationsdefizit resultierende Unschärfen bei der wirtschaftlichen Beurteilung komplexer Infrastrukturprojekte objektiv bzw. mathematisch zu erfassen und in den Planungsprozess einzubeziehen. Es erfolgt eine Beurteilung und beispielhafte Überprüfung, inwiefern die Random Set Methode bei Bestimmung der für den Optimierungsprozess von Wasserkraftanlagen relevanten Eingangsgrößen Anwendung finden kann und in wieweit sich hieraus Verbesserungen hinsichtlich Genauigkeit und Aussagekraft der Berechnungsergebnisse ergeben.
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The role of heads of departments in the teaching of mathematics in primary schools of the Eastern Cape ProvinceZide, Nkosinati Kennedy 01 March 2021 (has links)
The study sought to investigate the role of Heads of Departments (HoDs) in the
teaching of mathematics in primary schools of the Eastern Cape Province in the OR
Tambo Inland District using a qualitative approach and a case study design in
particular. Data was collected using both semi-structured and focus group interviews
with eight purposively selected heads of departments in the district in six schools. Data
was analysed using Colaizzi’s method of data analysis from which three themes
emerged.
The first one was that the current performance management system interfered with
the roles and responsibilities of the HoDs in schools in their daily activities and in the
organisation of their work. Second, the barriers in achieving learners’ good
performance in mathematics interfered with the HoDs’ responsibilities to achieve good
learner performance in the subject. Third, a weak support system and inadequate
resources interfered with the learners’ performance in the subject.
The results here indicate that HoDs for mathematics experience various obstacles,
which affect subject teachers’ implementation to yield positive results, ultimately
leading to poor teaching and learning of the subject. These include the admission of
learners without the necessary foundations in mathematics which was viewed as an
obstacle to learner performance. The study further suggested that the HoDs of
mathematics should be capacitated on use of teaching aids, management and
administration to improve learner performance in the subject. / Educational Management and Leadership / M. Ed. (Education Management)
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A framework for effective implementation of Integrated Quality Management System in primary schools in the Western Cape provinceSigudla, Jeffrey Pikky 17 August 2020 (has links)
The purpose of the study was to investigate the practices and challenges faced by primary schools in the Western Cape province when implementing the Integrated Quality Management System (IQMS) policy. The study concentrated mainly on monitoring and evaluation processes; as well as the relevance and appropriateness of the measures in place for refining the IQMS.
In 1994, the attainment of democracy in South Africa brought radical transformation to the education system, which resulted in the development of various educational policies. One of these policies was the Integrated Quality Management System (IQMS), which was introduced in 2003. The IQMS was aimed at improving quality education delivery. However, based on learners’ academic and quality results in terms of progression over the past two decades, the South African education system may not have achieved all of its desired outcomes. The school development teams, especially those in rural and previously disadvantaged schools, do not comply with the principles of the IQMS policy and, as a result, fail in their mandate.
The empirical approach employed in this study was successful in obtaining information from participants about the challenges they faced in implementing the IQMS policy. The study used qualitative approach. Participants included post-level one teachers as well as members of the school management team at five different schools. The research findings indicated that some schools only implement the IQMS to comply with the department requirements and to ensure that their educators receive the salary increments based on IQMS. Consequently, there is no real school development taking place. The study made a number of recommendations to consider with regard to effective implementation of IQMS in schools. It is recommended that the School Development Team (SDT) and the School Management Team (SMT) employ a well-adjusted approach to whole school evaluation, with a resilient effort on both professional development and performance appraisal in the engagement of whole school development. The study also suggests the appointment of Senior Education Specialists who will be based at every school and become part of the SDTs in order to assist the schools in converting evaluation into school development. Further suggestion is also made for performance agreements and targets linked to salary increments. / Educational Management and Leadership / Ph. D. (Education Management)
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Who are we and what do we measure? : A case study of the dynamic relationship between performance measurement and organizational identityKällgren, Marcus, Vejbrink Kildal, Adrian January 2022 (has links)
Performance measurements have been described as a tool by which management can communicate expected standards of behavior as well as a shared meaning among members regarding the intended direction of the firm. In parallel, the organizational identity field relies on the premise that members can answer the question “who are we as an organization?” through a sense of shared understanding. The purpose of this paper is to investigate the implications a performance measurement system has on the employees’ perception of “who we are“, related to the theoretical framework of organizational identity. This paper utilizes a qualitative research method, a case-based approach of a Swedish life science company which is conducted in an exploratory manner. The case company is chosen due to its contextual setting regarding the newly implemented performance measurement system, along with the inherent characteristics of the industry in general, which is typically considered to be incongruent with such quantitative measurements. The empirical data is collected through eight interviews with members from the chosen case company, as well as through internal documents describing its performance measurement system. The authors propose a revised theoretical framework in which performance measurements and organizational identity are investigated through a conceptual model which explores their dynamic relationship. The findings reinforce well-known ideas of performance measurements and organizational identity, along with providing new insights on the dynamics between them. Keywords: Organizational Identity, Performance Measurement System, Performance Management, Identity-Dynamics
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The role of the state in the establishment of a culture of learning and teaching in South Africa (1910-2004)Baloyi, Colonel Rex 31 December 2004 (has links)
Formal state-controlled education has been a central element for social development in South Africa since the formation of the Union of South Africa in 1910. The establishment and promotion of a culture of learning and teaching is regarded as a pre-condition for high educational standards. This thesis is a study of the role of the state in the establishment of a culture of learning and teaching in South Africa from 1910 to 2004.
To understand the role that the state played in promoting, or inhibiting, a culture of learning and teaching, a historical review was taken of the state's role in formal schooling in the period of the Union (1910-1947), the era of apartheid (1948-1989), the transitional period (1990-1994) and in the era of the democratic South Africa. As an ideal, the state has a responsibility to ensure the establishment of a culture of learning and teaching. The historical review revealed, however, that the state used its policies to promote political rather than educational ideologies - and in the process, there was a complete breakdown in a culture of learning and teaching.
The establishment and promotion of a culture of learning and teaching towards the maintenance of high academic standards in South African state schools was the motivating force behind this study. Therefore, this study concludes with guidelines and recommendations grounded in the historical review that will hopefully promote a culture of learning and teaching in South African schools in future. / Educational Studies / D.Ed. (History of Education)
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| 997 |
The role of the state in the establishment of a culture of learning and teaching in South Africa (1910-2004)Baloyi, Colonel Rex 31 December 2004 (has links)
Formal state-controlled education has been a central element for social development in South Africa since the formation of the Union of South Africa in 1910. The establishment and promotion of a culture of learning and teaching is regarded as a pre-condition for high educational standards. This thesis is a study of the role of the state in the establishment of a culture of learning and teaching in South Africa from 1910 to 2004.
To understand the role that the state played in promoting, or inhibiting, a culture of learning and teaching, a historical review was taken of the state's role in formal schooling in the period of the Union (1910-1947), the era of apartheid (1948-1989), the transitional period (1990-1994) and in the era of the democratic South Africa. As an ideal, the state has a responsibility to ensure the establishment of a culture of learning and teaching. The historical review revealed, however, that the state used its policies to promote political rather than educational ideologies - and in the process, there was a complete breakdown in a culture of learning and teaching.
The establishment and promotion of a culture of learning and teaching towards the maintenance of high academic standards in South African state schools was the motivating force behind this study. Therefore, this study concludes with guidelines and recommendations grounded in the historical review that will hopefully promote a culture of learning and teaching in South African schools in future. / Educational Studies / D.Ed. (History of Education)
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