Im Mittelpunkt der Arbeit stehen Alanate und Aluminiumhydride der Übergangs- und Erdalkalimetalle in Bezug auf ihre Synthese, ihre thermodynamischen Eigenschaften, ihre Zersetzungsreaktionen und ihre potentielle Eignung für reversible Wasserstoffspeicheranwendungen. Es konnten für CeAlH6, Mg(AlH4)2, Ca(AlH4)2, Sr(AlH4)2, CaAlH5 und SrAlH5 die Wärmekapazitätsfunktionen sowie die absoluten Entropien und Bildungsenthalpien bei 298,15 K bestimmt werden. Weiterhin wurden Methoden zur Näherung der genannten thermodynamischen Daten evaluiert und mit den ermittelten Werten aktualisiert und erweitert. Außerdem wurde die im Bereich der komplexen Hydride übliche Annahme, dass sich die bei der Synthese gebildeten Nebenprodukte LiCl und NaCl gegenüber den Hydriden inert verhalten, überprüft. Es konnte gezeigt werden, dass die Annahme hinsichtlich der Eigenschaften und Zersetzungsreaktionen von Mg(AlH4)2, Ca(AlH4)2 und Sr(AlH4)2 Bestand hat. In Bezug auf die Dehydrierung von CaAlH5 und SrAlH5 ist sie jedoch ungültig, wenn die Probe LiCl enthält.

This study was motivated by a desire to address the challenges of introductory programming courses. Ethiopian universities teach such courses in large classes (80+ students) and students complain about the difficulty of the courses and teaching variation of instructors. The study was set to explore optimum course and learning environment design approaches. The research question raised was: how can a blended learning approach be used to improve large class teaching of programming? In an action design research approach, the study was initiated with redesigning two consecutive courses and a supportive blended learning environment on the basis of existing learning theories and educational design frameworks. Two cycles of action research were conducted for a dual goal of refinement and evaluation of the intervention. The action research was conducted during the 2012/13 academic year with 240 students at the beginning. A predominantly quantitative first cycle of action research produced a mixed outcome. The students’ marks from assessment activities were fairly close to results from two other international universities. A pre- and post-implementation survey of students’ approach to learning showed a slight class level change towards the deep learning approach. Conversely, some students were found at-risk (not progressing well) and certain technologies, particularly program visualisation tools, were found underutilised. The second action research cycle aimed to explain the result from the first round. A grounded action research evaluation of data from focus group discussions, interviews and participants’ memos identified plausible factors for meaningful programming learning in a large class. These factors were use of collaborative and pair programming; alignment of learning and assignment activities; integrated use of e-learning; and use of large class strategies like student mentors and team teaching. A critical realist interpretation of the result of the action research suggested that students can learn programming in large classes, 200+ in this study, with a course and learning environment design that keeps them engaged in learning and assessment activities. The study concludes that improved learning of programming can be possible with the use of students as mentors and changed role-dynamics of instructors, which presupposes adaptation of suitable pedagogical approaches and use of technologies. / School of Computing / D. Litt. et Phil. (Information Systems)

This thesis set out to ascertain the position of recent Australian Governments on the latest instalments of Asian regionalism in the context of an assessment of whether there has been a redefinition of Asia and thus a redefinition of Australia???s engagement with Asia. It will concentrate on the broad themes of politico-strategic and economic engagement. Whilst there has been extensive research and documentation on the Asian economic crisis there has been less work on the issue of a new Asian regionalism and the implications for Australia???s complex and variable engagement with the region. This is the basis for the claim to originality of this thesis, a claim supported by its focus on the practical and policy implications of Australia???s engagement, or lack of it, with regional institutions. The process of regional integration has been extremely slow, thus supporting the conclusion that there is no evidence of a major redefinition of Asia. Efforts at Asian regionalism are meeting obstacles that pose immense challenges. Asian regionalism remains nascent and poorly defined. This reflects the diversity and enormous disparities in cultures, political systems and the levels of economic development and differences over economic philosophies within East Asia. What is discernible is that the regionalism is proceeding more rapidly on financial issues than on trade, and in the security area it is conspicuously absent. This research highlights the fact that the question of Asian engagement remains a sensitive issue in Australia and continues to grow more complex. Australia???s engagement with Asia since 1996 has been variable because of the Howard Government???s broader balance of priorities between global and regional issues, and because of the changing nature of the Asian region. The perception gleaned from sources is that, for the Australian Government, regionalism initiatives are characterised by much discussion but lack substance. Consequently, this appears to have led the Government to the position that exclusion from some manifestations of regionalism is not so important. Australia is excluded from some of the regional architectures being constructed. In its efforts to seek inclusion in ASEAN + 3 and ASEM, Australia is facing the same barriers that have stood in the way of an AFTA-CER agreement. Exclusion would be important if the performance of regional groupings was not so indifferent. Exclusion from ASEAN + 3 and ASEM, however, does not equate to Australia???s exclusion from the region.

This thesis set out to ascertain the position of recent Australian Governments on the latest instalments of Asian regionalism in the context of an assessment of whether there has been a redefinition of Asia and thus a redefinition of Australia???s engagement with Asia. It will concentrate on the broad themes of politico-strategic and economic engagement. Whilst there has been extensive research and documentation on the Asian economic crisis there has been less work on the issue of a new Asian regionalism and the implications for Australia???s complex and variable engagement with the region. This is the basis for the claim to originality of this thesis, a claim supported by its focus on the practical and policy implications of Australia???s engagement, or lack of it, with regional institutions. The process of regional integration has been extremely slow, thus supporting the conclusion that there is no evidence of a major redefinition of Asia. Efforts at Asian regionalism are meeting obstacles that pose immense challenges. Asian regionalism remains nascent and poorly defined. This reflects the diversity and enormous disparities in cultures, political systems and the levels of economic development and differences over economic philosophies within East Asia. What is discernible is that the regionalism is proceeding more rapidly on financial issues than on trade, and in the security area it is conspicuously absent. This research highlights the fact that the question of Asian engagement remains a sensitive issue in Australia and continues to grow more complex. Australia???s engagement with Asia since 1996 has been variable because of the Howard Government???s broader balance of priorities between global and regional issues, and because of the changing nature of the Asian region. The perception gleaned from sources is that, for the Australian Government, regionalism initiatives are characterised by much discussion but lack substance. Consequently, this appears to have led the Government to the position that exclusion from some manifestations of regionalism is not so important. Australia is excluded from some of the regional architectures being constructed. In its efforts to seek inclusion in ASEAN + 3 and ASEM, Australia is facing the same barriers that have stood in the way of an AFTA-CER agreement. Exclusion would be important if the performance of regional groupings was not so indifferent. Exclusion from ASEAN + 3 and ASEM, however, does not equate to Australia???s exclusion from the region.

This study was motivated by a desire to address the challenges of introductory programming courses. Ethiopian universities teach such courses in large classes (80+ students) and students complain about the difficulty of the courses and teaching variation of instructors. The study was set to explore optimum course and learning environment design approaches. The research question raised was: how can a blended learning approach be used to improve large class teaching of programming? In an action design research approach, the study was initiated with redesigning two consecutive courses and a supportive blended learning environment on the basis of existing learning theories and educational design frameworks. Two cycles of action research were conducted for a dual goal of refinement and evaluation of the intervention. The action research was conducted during the 2012/13 academic year with 240 students at the beginning. A predominantly quantitative first cycle of action research produced a mixed outcome. The students’ marks from assessment activities were fairly close to results from two other international universities. A pre- and post-implementation survey of students’ approach to learning showed a slight class level change towards the deep learning approach. Conversely, some students were found at-risk (not progressing well) and certain technologies, particularly program visualisation tools, were found underutilised. The second action research cycle aimed to explain the result from the first round. A grounded action research evaluation of data from focus group discussions, interviews and participants’ memos identified plausible factors for meaningful programming learning in a large class. These factors were use of collaborative and pair programming; alignment of learning and assignment activities; integrated use of e-learning; and use of large class strategies like student mentors and team teaching. A critical realist interpretation of the result of the action research suggested that students can learn programming in large classes, 200+ in this study, with a course and learning environment design that keeps them engaged in learning and assessment activities. The study concludes that improved learning of programming can be possible with the use of students as mentors and changed role-dynamics of instructors, which presupposes adaptation of suitable pedagogical approaches and use of technologies. / School of Computing / D. Litt. et Phil. (Information Systems)