3,720 Works

Outdoor recreation on Galiano Island : factors which influence participation.

Dougald George MacDonald
The purpose of this thesis is to examine the factors which explain the patterns of outdoor recreation that a given population pursues on a given land surface. Patterns of use were understood as (1) the types of activities the population pursued and the frequency with which they pursued them, and (2) the distribution of these activities over a differentiated land surface. Emphasis was placed on designing a methodological framework within which the explanatory value of...

Design of SiGe/Si quantum-well optical modulators

Tania Tasmin
An electro-optic modulator containing a single SiGe/Si quantum-well has been designed for operation at λ₀= 1.55 µm. This single quantum-well modulator has a lower VπLπ than the 3 quantum-well modulator recently designed and optimized by Maine et al. for operation at λ₀= 1.31 µm, for which the VπLπ product was 1.8 V•cm [25]. Both modulators are derived from the detailed design given for their modulator in [40]. This single quantum-well modulator contains a Si₀.₈Ge₀.₂ quantum-well...

Call control signalling for personal communications over interconnected metropolitan area networks

Nanjian Qian
Personal communication services (PCS) are currently being developed to enable people to call other people regardless of their locations and movements. A distributed personal communication network (PCN) based on the IEEE 802.6 metropolitan area networks (MANs) has been recently proposed as a means of supporting PCS. This network must be supported by efficient and reliable signalling, which has not been extensively examined and will be the main subject of this thesis. While pre-arbitrated (PA) slots...

Learning latent theories of relations and individuals

Michael Chi-Hao Chiang
Inductive learning of statistical models from relational data is a key problem in artificial intelligence. Two main approaches exist for learning with relational data, and this thesis shows how they can be combined in a uniform framework. The first approach aims to learn dependencies amongst features (relations and properties), e.g. how users' purchases of products depend on users' preferences of the products and associated properties of users and products. Such models abstract over individuals, and...

Detection of mountain pine beetle infestations using Landsat TM Tasseled Cap transformations

Rajeev Sharma
This study investigated the identification of probable mountain pine beetle (Dendroctonus ponderosae Hopk.) attacked sites using Tasseled Cap transformations namely, brightness, greenness and wetness, derived from Landsat-7 digital data in parts of Vanderhoof Forest District, in Prince George Forest Region, British Columbia. Lodgepole pine (Pinus contorta Dougl.) constitutes about 80 percent of the total forest vegetation in the study area. About 85 percent of lodgepole pine stands are greater than 60 years of age, and...

Initial effects of clearcutting on the flow of chemicals through a forest-watershed ecosystem in south-western British Columbia

A literature survey indicated that little was known about the effects of commercial clearcutting on stream and watershed solution chemistry. To investigate these effects, five small watersheds were studied in the University of B.C. Research Forest. Three of the watersheds were equiped with weirs, stream height recorders, and soil-air-water thermographs. Soil pits were dug in the three calibrated watersheds and equiped with surface runoff collectors and hanging water column tension lysimeters. Samples of - precipitation...

Immunolocalization of a proteinase produced by the sap-staining fungus, Ophiostome piceae

Cyrla Hoffert
Ophiostoma piceae, the most frequently isolated sap-staining fungus in Canada, produces an extracellular subtilisin-like, serine proteinase. This enzyme is presumed to serve an important nutritive function for the fungus as it grows in wood where nitrogen is found primarily in the form of protein. To further characterize this proteinase, an attempt was made to detect and localize it in O. piceae cells. The fungus was grown in a minimal, liquid medium supplemented with either protein...

An investigation into the factors contributing to the growth-check of conifer regeneration on Northern Vancouver Island

Louise E. M. De Montigny
Conifer plantations established on cutovers in the CWHb1 zone on Northern Vancouver Island grow well initially, but coincident with the reinvasion of salal (Gaultheria shallon Pursh.) on sites formerly dominated by western red cedar and western hemlock (CH phase) the trees become chiorotic and growth stagnates. These symptoms are not seen on sites dominated by western hemlock and amabalis fir (HA phase). This study examined some site and soil chemical factors which could be responsible...

Effects of clearcutting on landscape structure and bird species diversity and abundance in the Rocky Mountains

Pierre Raoul Paul Varnier
Even-aged, short-rotation forest practices are increasingly replacing wildfires as the dominant large-scale disturbance process in many forest landscapes of British Columbia. The resulting landscape patterns are often dramatically different from historical patterns with consequences for forest birds and other wildlife species that are poorly understood, especially at the landscape level. The goal of this study was to assess the effects of clearcutting on the structure of forest landscapes and to describe the response of birds...

The personality characteristics of three groups of athletes

Neil Henry Murray
The personality characteristics of three different groups of athletes at the University of British Columbia were investigated to determine: 1. If significant differences existed among the personalities of the three different groups. 2. If there were significant differences in personality between the total number of athletes tested and the college norms. 3. If one group of athletes differed from the norm more than the other groups. Cattell's Sixteen Personality Factor Questionnaire was administered to forty-five...

The effect of self-efficacy on coping behaviours, performance, and emotions in youth swimmers

Valerie Hadd
This study investigated how self-efficacy and coping influences performance and performance related emotions in high performance youth swimmers. Lazarus' (1991. 1999) Cognitive Relational-Motivational Theory holds that how people cope with stress is a process that can subsequently influence both performance and emotions. Problemfocused (i.e. efforts to change a situation), emotion-focused (i.e. emotional control), and avoidance (i.e. withdrawal) coping are three coping functions frequently investigated in sport (Crocker & Graham, 1995; Gaudreau & Blondin, 2002). Self-efficacy,...

Expert spindle design system

Osamu Maeda
Machine tool spindle is the most important mechanical component in removing metal during machining operations. The structural dynamics of the spindle are evaluated at the tool tip since it directly affects the material removal rate. Flexible spindles lead to unstable chatter vibrations, which can be avoided only by reducing the material removal rate. In addition, the spindle motor must have sufficient torque and power to overcome the cutting resistance of work materials to be machined....

Plastic postbuckling behaviour of axially compressed cylindrical shells

Tony K.P. Tang
Theoretical analysis is presented to investigate the plastic post-buckling behaviour of a thin cylindrical shell restrained by a central mandrel under axial compressive loading. Axisymmetric bulges are formed. Work-hardening is neglected. The Tresca sandwich-shell yield condition is used, and it is found that bulging is most suitably described by a three-hinge model. The bulge length of the collapse mode can be predicted approximately by using the upper-bound theorem. Agreement with the theoretical and experimental results...

Exploring the impact of long qt syndrome : perspectives from a northern British Columbia First Nations community

Lee-Anna Jennifer Huisman
There is a disproportionately high rate of hereditary Long QT Syndrome (LQTS) in Northern British Columbia First Nations people, partly due to a novel missense mutation in KCNQ1 (V205M). The effect has been previously described (Arbour et al, 2008) predisposing those affected to syncope, arrhythmia and sudden death. A community based participatory research approach has enabled over 250 community members to take part, identifying more than 40 carriers of the mutation. Although a great deal...

God's scientists : the renovation of natural theology in England, 1653-1692

Katherine Calloway
“God’s Scientists” contributes to the current understanding of natural theology’s relationship to the so-called scientific revolution. Natural theologies, texts aiming to demonstrate the reasonableness of Christianity, increased rapidly in popularity in England between 1650 and 1700, a curious phenomenon that has often been linked with a wider intellectual shift. In the medieval period, truth was thought to be best acquired by the application of deductive logic to a set of received dicta. During the Renaissance,...

Audiovisual speech perception in 4-month-old infants

Renée Nicole Desjardins
Previous research indicates that for adults and children the perception of speech can be significantly influenced by watching a speaker's mouth movements. For example, hearing the syllable /bi/ while watching a speaker mouth the syllable /vi/ results in reports of a 'heard' /vi/. Some evidence suggests young infants also may be able to integrate heard and seen speech. One theory suggests that an innate link between perception and production (Liberman & Mattingly, 1985) accounts for...

Building on a living heritage : adaptive reuse of a railyard roundhouse

Barbara Lynn Gordon-Findlay
The reuse of existing buildings designed for a specific purpose that has become obsolete is an activity increasingly relevant in today's society. At one end of the spectrum is the complete obliteration of historical artifacts to make way for new development. At the other end is the preservation of an instant in time held eternally distant as a museum. The body of effort expended in the 1970's resulted in much commendable legislation to protect our...

International peers : perceptions of the host-national peers in a program designed to aid the adjustment of international students at the University of British Columbia

Myrna Duthie
Perceptions of the Host-National Peers in a Program Designed to Aid the Adjustment of International Students at the University of British Columbia Foreign students want and need social contact with people from the host country when they study abroad. The Counselling Psychology Department at the University of British Columbia has developed a peer program where Canadian students are paired with foreign students in an attempt to ease the feelings of loneliness and isolation which these...

A descriptive study of the adoption experience of adolescents and their families

Sandra J. Gamlin
A descriptive study was conducted to investigate the adoption experience within the family. Adoptive families who participated in this study were assumed to be a relatively heterogeneous sample of the target population - families with at least one adopted child who had been adopted early in life, and who was presently 14-18 years of age. Thirteen adoptive families participated in the study. Qualitative data regarding each individual's perception of the adoption experience was obtained through...

Older adults' experiences of an age-segmented exercise program

Katherine Maliha
This study examined the experiences of older adults within an age-segmented fitness program. The research was guided by the following questions: (1) What are the experiences of group members of a program designed for older adults?; and (2) How are members’ experiences related to their social position? Current research has demonstrated that the physical activity and exercise levels of older adults progressively decrease with age. To date, studies have shown that older adults who exercise...

A Dybbuk : between two worlds

Yulia Shtern
In the early spring of 2007 I was approached by the then directorial MFA candidate David Savoy with a request to design the scenery for his thesis production A Dybbuk by S. Ansky in an adaptation by Tony Kushner, and I accepted his offer. The other members of the design team were Ariel Rivera for Costume Design (a BFA Design and Production graduate), Ian Giles for Lighting Design (a BFA Design and Production graduate) and...

Effects of plant growth regulators and temperature on floral induction and development of Exacum Styer Group

Laura Marie Sand
Plants of Exacum Styer Group, interspecific hybrids from five Sri Lankan taxa from the Gentian family, have significant horticultural potential as flowering potted plants, bedding plants and cut flowers. However, a better understanding of the requirements for floral induction and flower development is needed before commercialization. Experiments examining the impact of plant growth regulators (PGRs) on floral induction and subsequent plant development consisted of seven treatments: ethephon (500 and 1000 PPM), daminozide (2500 and 3500...

An application of selected artificial intelligence techniques to engineering analysis

Bruce W.R. Forde
This thesis explores the application of some of the more practical artificial intelligence (Al) techniques developed to date in the field of engineering analysis. The limitations of conventional computer-aided analysis programs provide the motivation for knowledge automation and development of a hybrid approach for constructing and controlling engineering analysis software. Artificial intelligence technology used in this thesis includes: object-oriented programming, generic application frameworks, event-driven architectures, and knowledge-based expert systems. Emphasis is placed on the implementation-independent...

The dynamic response of timber shear walls

James Daniel Dolan
This thesis describes three numerical models, developed by the author, that predict the behavior of timber shear walls. Two of the models have been implemented in finite element programs. One program predicts the static behavior of shear walls and the other predicts the dynamic response to earthquakes. Both programs incorporate 1) the ability to predict the ultimate load capacity of the walls, 2) the effects of bearing between adjacent sheathing panels, 3) the effects of...

Addressing physical inactivity in children through inter-organizational collaboration : a study of benefits and challenges

Wendy Ladner-Beaudry
Physical inactivity in children is being recognized as a growing problem in Canadian society and one contributing factor is the undervaluing and subsequent decline of physical education in the public elementary school system (Bedingfield, 1995; Donnelly & Kidd, 2003; Kidd, 1999; Wilson, 2002). Developing partnerships with other organizations in the sport delivery system has been recommended as one strategy for addressing this social problem (Canadian Sport Policy, 2002; Mills Report, 1998; Thibault & Harvey, 1997)....

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