This thesis analyses the flaked stone assemblage from the Hiikwis site complex (DfSh-15 and DfSh-16) in Barkley Sound, British Columbia. The Hiikwis flaked stone assemblage is anomalous within Barkley Sound due to the presence of relatively abundant flaked stone in late contexts. Prior to Hiikwis, the most recent flaked stone in Barkley Sound dated to approximately 2000 BP. Hiikwis has flaked stone beginning at approximately 2800 BP and lasting until the final occupation of the site in the early 1900s. Artifacts are classified based on a descriptive lithic analysis and then the behavioural implications of the assemblage are discussed through use of the chaîne opératoire and theories of technological organization and design theory. Spatial and temporal differences become apparent throughout the site and demonstrate changes in the types of tools used over time. The Hiikwis site complex is compared to other sites within the region, as well as beyond. A discussion of the attributes of the West Coast culture type and the Gulf of Georgia traditions makes it clear that the findings at Hiikwis support the Wakashan Migration Hypothesis. In turn, this assemblage calls for a re-evaluation of the West Coast culture type, while suggesting that there may be other unexcavated sites in Barkley Sound with flaked stone in recent components. / Graduate

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The dynamio characteristics of journal bearings have been predicted by solving Reynolds equation with a common cavitation model. A perturbation analysis has been used to express the equations governing the fluid film pressure and cavitation region state in terms of a dynamic journal displacement vector. The use of these equations has been demonstrated on the long and short bearing approximations. The stability performance has been predicted for both rigid and flexible bearing systems. A perspex test bearing has been used to observe cavitation under steady and dynamio loads, and a high speed test apparatus was developed for the measurement of lubricating film performance at whirl onset conditions. Although the test results were consistent and repeatable, the stability performance of the bearings tested was substantially less than the predictions of the simple bearing theory and other workers results. It is thought that the poor performance was due to oil starvation.

In this computer-aided study, existing methods of determining the fluid flow in axial flow turbomachines are examined, and the Consistent Loss Model of Bosman and Marsh is here applied to both duct flow and intrablade applications of the Streamline Curvature technique. The resulting equations are presented in a form similar to that of the conventional equations, thus providing for easy modification of existing Streamline Curvature method computer programs. Interpretation of the equations shows that the mean flow through a blade row passage cannot follow a parabolic path between the blade inlet and outlet flow angles, as is commonly assumed, but must maintain as continuous the streamwise derivative of angular momentum. Procedures are described to design three-dimensional blade shapes from basic aero foil data, and to derive realistic intrablade mean stream surfaces, including allowances for flow deviation and secondary flow. Numerical techniques are presented which have been developed for closely-spaced intrablade calculation grids, to obtain faster convergence than by conventional schemes in Streamline Curvature calculations. The computer program is intended for analysing multi-stage axial flow compressors; tests are presented of simple analytical cases and experimental data for isolated rows of blades, of a' swan-necked' duct, and of a three-row experimental compressor. Three-dimensional flow calculation methods are reviewed with reference to the limitations inherent in applying them to axial flow turbomachines. Suggestions are made for future work.

The organizational (procurement, manufacture, maintenance/discard) and structural (composition, diversity, complexity) dimensions of contemporary hunter-gatherer technological strategies are discussed in terms of the selective advantages for limiting subsistence costs and/or risks. It is argued that where subsistence is primarily cost (energy) limited technological strategies differ from those employed where risk (time) is limiting. Anticipatory organizational strategies - embedded procurement and reduction, and curation - achieve their most significant role in time-stressed contexts where there are selective benefits in separating subsistence and technological schedules. Structural strategies-- function-specific tools, diverse tool-kits, complex tool design - offer selective benefits where the act of food procurement is time-stressed. If subsistence is time-stressed but cannot be effectively 'separated from technological schedules tools may be made both reliable (high component redundancy) and maintainable (readily repaired) - the latter being facilitated by limiting component design thereby enabling materials of varied quality to be employed. The implications of differing organizational and structural strategies for the formation of the archaeological record and for the lithic analyst are discussed. Evidence concerning the environment, chronology, economy, settlement and technology of the Mesolithic of mainland Britain is reviewed. For the Earlier Mesolithic an alternative to the Clark model of subsistence and mobility is developed, whilst multivariate analyses of stone tool inventories and evidence concerning the function, complexity and design of microlithic tools provides the basis for suggestions as to the character and significance of the Earlier-Later Mesolithic transition. Analyses of lithic debitage from sites in northern England provide evidence for embedded procurement and reduction strategies during the Earlier Mesolithic consistent with the expectations of a model where autumn was spent in upland valleys engaged in intercept hunting, winter was spent in lowland residences.

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