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Call number: LD2668 .T4 1964 L97 / Master of Science

Call number: LD2668 .T4 1965 P336 / Master of Science

Call number: LD2668 .T4 1978 C377 / Master of Science

Low pressure steam turbine last stage blade behaviour was investigated and researched over duration of this PhD project period. The aim of the research was to enhance the life of last stage blades by investigation and mitigation of the accumulative damage throughout the life of the turbine blade. The research was mainly broken down in to three main themes covering erosion, High Cycle Fatigue in industrial service and High Cycle Fatigue under laboratory conditions. The three themes were then further analysed during the research analysis for correlation and the extent of accumulative damage contribution during each stage. An accumulative damage model was constructed together with mathematical expressions for each stage of accumulative damage. The erosion damage model was constructed first and separately, followed by a separate damage model for crack initiation and propagation. After this a combined damage model was constructed to represent accumulative damage throughout the turbine blade lifecycle. After the damage mechanisms were researched and understood, a damage mitigation model was constructed consisting of primary damage mechanisms and secondary damage mechanisms. The primary damage mechanisms were then investigated further and a life extension technique developed to increase turbine blade life by reducing damage rates per turbine start, giving more starts life capability to the last stage blades. The secondary mitigation mechanisms was not covered in this project and regarded as future work under the low pressure turbine life extension possibilities. The research work also gave a spin off which allowed the author to conduct and finish a separate piece of work of designing the problem out through redesigning the turbine blade and condenser space in conjunction with leading experts from the industry.

Cretaceous continental extension was accommodated by the development of the Paparoa Metamorphic Core Complex, resulting in the separation of New Zealand from Gondwana. High grade (Lower Plate) and low grade (Upper Plate) rocks are separated by the Ohika and Pike Detachment Faults. The two detachment faults have distinctly different histories, with greater exhumation along the Pike Detachment Fault. The onset of crustal extension is proposed to have commenced along the Pike Detachment Fault at 116.2 ± 5.9 Ma (Rb/Sr dating). Both geochemical and geochronological approaches are adopted for this thesis, through the in situ analysis of oxygen and hafnium isotope ratios, trace metals and U-Pb content. Chemical changes are tracked during the petrogenesis of the Buckland Granite, with mafic replenishment observed in the later stages of crystallisation. Crystallisation temperatures of the Buckland Granite are calculated using zircon saturation thermometry, with an average Ti-in-zircon temperature of 697℃ (upper-amphibolite facies). Inherited zircons in Lower Plate rocks show distinct age peaks at c. 1000, 600 and 300 Ma, illustrating the incorporation of heterogeneous local crust (Greenland Group and Karamea Batholith). Model ages (TDM) are calculated for inherited zircons of the Lower Plate rocks, which record the time at which magma bodies (zircon host rocks) were extracted from the mantle. Maximum and minimum model ages for the Buckland Granite average at 3410 Ma and 2969 Ma, with the maximum TDM value of 3410 Ma coinciding with the proposed major crustal formation event of the Gondwana supercontinent at c. 3.4-3.5 Ga. Two distinct U-Pb zircon age peaks are observed in the Buckland Granite at 102.4 ± 0.7 and 110.3 ± 0.9 Ma. The 110.3 ± 0.9 Ma age is interpreted as the crystallisation age of the pluton, while the 102.4 ± 0.7 is proposed to represent a younger thermal (magmatic?) event associated with the 101-102 Ma Stitts Tuff.

2 pp. / This fact sheet briefly describes the socioeconomic and cultural aspects of the Hualapai reservation.

2 pp. / This fact sheet briefly describes research protocol on the Hualapai reservation.

The study identified the "most important" and the "most feasible" poultry extension strategies for the improvement of poultry production in Bangladesh during the next five years. Eighty-two poultry Extension agents of the Bangladesh Department of Livestock assessed the importance of the poultry Extension strategies and 15 Extension administrators assessed the feasibility of the "most important" strategies as identified by the agents. The response rate was 82.4% for the extension agents and 100% for the administrators. Descriptive statistics were used to analyse their responses. The respondents identified 38 "most important" poultry Extension strategies and 12 of these strategies as being also "most feasible" for the improvement of poultry production in Bangladesh. In addition, using the Spearman rank order correlation (rs, the study found that there was no significant difference between poultry Extension agents who were Veterinary Science graduates and Animal Husbandry graduates in their ranking of the importance of the poultry extension strategies despite the differences in their educational preparation.