The expression of tradition: perennial gardening in St. John's, Newfoundland

In order to understand the processes which effect the individual realization of garden design, I have studied the practise of perennial gardening in St. John's, Newfoundland. I begin with an examination of the practical constraints on design intentions resulting from difficult growing conditions, and a limited market of plant materials, relevant gardening literature and skilled· garden workers. I establish the local repertoire of design models within which individual gardens are executed. Finally, I record the "text" of six ·perennial gardens and the commentary of their principal designers in order to examine both the implicit and explicit considerations informing the structure of the gardens. A sample of gardens has been examined in order to represent two principal performance contexts -- the public garden and the private garden -- and a characteristic selection of garden style and plant material is observed. The public gardens typically recall the "traditional" use of perennials in Newfoundland gardens through the selection of "old fashioned" plant species and through the overall design of the bed. In contrast, the private gardeners have generally adopted the style of the more recently fashionable "perennial border". However, below the level of design the private gardeners continue to express a sense of tradition in the _repetition of conventions of behaviour and expression among the gardeners' families and friends, in the propagation of individual plants grown by the gardeners' parents, and in the maintenance of a family interest in gardening. This examination of the practise of gardening, thus, leads away from the folklorists' traditional focus on the continuity of the traditional "item" towards an understanding of tradition as an expression of continuity which is given tangible shape according to the avenues of shared communication within particular performance contexts.

An evaluation of home range models for marine fish tracking and fine scale habitat use and movement patterns of age 1 Greenland cod (Gadus macrocephalus ogac)

My thesis examines fine-scale habitat use and movement patterns of age 1 Greenland cod (Gadus macrocephalus ogac) tracked using acoustic telemetry. Recent advances in tracking technologies such as GPS and acoustic telemetry have led to increasingly large and detailed datasets that present new opportunities for researchers to address fine-scale ecological questions regarding animal movement and spatial distribution. There is a growing demand for home range models that will not only work with massive quantities of autocorrelated data, but that can also exploit the added detail inherent in these high-resolution datasets. Most published home range studies use radio-telemetry or satellite data from terrestrial mammals or avian species, and most studies that evaluate the relative performance of home range models use simulated data. In Chapter 2, I used actual field-collected data from age-1 Greenland cod tracked with acoustic telemetry to evaluate the accuracy and precision of six home range models: minimum convex polygons, kernel densities with plug-in bandwidth selection and the reference bandwidth, adaptive local convex hulls, Brownian bridges, and dynamic Brownian bridges. I then applied the most appropriate model to two years (2010-2012) of tracking data collected from 82 tagged Greenland cod tracked in Newman Sound, Newfoundland, Canada, to determine diel and seasonal differences in habitat use and movement patterns (Chapter 3). Little is known of juvenile cod ecology, so resolving these relationships will provide valuable insight into activity patterns, habitat use, and predator-prey dynamics, while filling a knowledge gap regarding the use of space by age 1 Greenland cod in a coastal nursery habitat. By doing so, my thesis demonstrates an appropriate technique for modelling the spatial use of fish from acoustic telemetry data that can be applied to high-resolution, high-frequency tracking datasets collected from mobile organisms in any environment.

Design, development and control of a new generation high performance linear actuator for parallel robots and other applications

The main focus of this research is to design and develop a high performance linear actuator based on a four bar mechanism. The present work includes the detailed analysis (kinematics and dynamics), design, implementation and experimental validation of the newly designed actuator. High performance is characterized by the acceleration of the actuator end effector. The principle of the newly designed actuator is to network the four bar rhombus configuration (where some bars are extended to form an X shape) to attain high acceleration. Firstly, a detailed kinematic analysis of the actuator is presented and kinematic performance is evaluated through MATLAB simulations. A dynamic equation of the actuator is achieved by using the Lagrangian dynamic formulation. A SIMULINK control model of the actuator is developed using the dynamic equation. In addition, Bond Graph methodology is presented for the dynamic simulation. The Bond Graph model comprises individual component modeling of the actuator along with control. Required torque was simulated using the Bond Graph model. Results indicate that, high acceleration (around 20g) can be achieved with modest (3 N-m or less) torque input. A practical prototype of the actuator is designed using SOLIDWORKS and then produced to verify the proof of concept. The design goal was to achieve the peak acceleration of more than 10g at the middle point of the travel length, when the end effector travels the stroke length (around 1 m). The actuator is primarily designed to operate in standalone condition and later to use it in the 3RPR parallel robot. A DC motor is used to operate the actuator. A quadrature encoder is attached with the DC motor to control the end effector. The associated control scheme of the actuator is analyzed and integrated with the physical prototype. From standalone experimentation of the actuator, around 17g acceleration was achieved by the end effector (stroke length was 0.2m to 0.78m). Results indicate that the developed dynamic model results are in good agreement. Finally, a Design of Experiment (DOE) based statistical approach is also introduced to identify the parametric combination that yields the greatest performance. Data are collected by using the Bond Graph model. This approach is helpful in designing the actuator without much complexity.

Five times daily: the dynamics of prayer worship among Muslim immigrants in St. John's, NL

This thesis explores the ritual of prayer among Muslim immigrants in the city of St. John's, NL. Immigration across national, cultural, religious, and ethnic borders is a moment in an individual's life marked by significant change. My premise is that in such contexts the relatively conservative nature of religious ritual can supply much-needed continuity, comfort, and consolation for individuals living through the immigrant experience. As well, ritual forms are often put under stress when transferred to a considerably different place and cultural context, where “facts on the ground” may be obstacles to traditional and familiar ritual forms. Changes to the understanding or practice of ritual are common in new cultural and geographic situations, and ritual itself often becomes not merely a means of social identification and cohesion, but a practical tool in processing change - in the context of immigration, in learning to live in a new community. St. John's is a lively and historic city and while Muslim immigrants may be a small group within it they nevertheless contribute to the city's energy and atmosphere. This thesis endeavours to better understand the life stories of ten of these newcomers to St. John's, focusing on their religious backgrounds and lives. In particular, this thesis seeks to better understand the place of prayer in the immigrant experience.