VictorJuiz/thesis huggingface dataset:
Children's Scripts for Peer Conflict During the Transition to School

Scripts for peer conflict were examined in a sample of 55 four- and five-year-old children. Children provided a full sequential report of the conflict strategies used in six hypothetical peer conflict situations involving disputes over possessions. Interviews were conducted at two time points (early and late) during the children’s first year of school. Scripts were studied at two different analytical levels examined separately in two manuscripts: in the first manuscript, conflict scripts were examined at the group level to reveal general patterns across the participants. The second manuscript explored individual differences in children’s conflict scripts by identifying subgroups of children on the basis of how their scripts unfolded from beginning to end. Analyses in the first manuscript offered support for the stability of children’s scripts across situations. Findings suggested that children internally represent the sequential unfolding of conflict. In particular, their scripts became more constructive as conflicts progressed towards termination, a pattern that was especially apparent later in the school year. As well, analysis of if-then contingencies within scripts revealed that problem solving (e.g., offering to share or negotiate) was perceived by children to de-escalate hostility in conflict, as problem solving was rarely followed by power assertive responses. Averaging actions across conflicts masked specific conflict processes that were captured with sequential analysis of patterns. In the second manuscript, the types of scripts children reported were examined in relation to their receptive language abilities, theory of mind, and social adjustment to school. There was some support for the hypothesis that children whose scripts were constructive (i.e., containing references to problem-solving and conciliation) had better receptive language skills and were more prosocial than children whose scripts were less constructive. Theory of mind was unrelated to children’s ability to represent perspective-taking in their scripts. Directions for future research on children’s conflict scripts are discussed.

Keywords: conflict
scripts
children
school
Advisor: Perlman, Michal
Methods for Exploring Heterogeneity in Systematic Reviews of Randomized Controlled Trials

This thesis consisted of three major components: 1. A sample of randomized controlled trials of herbal medicines was collected and assessed with a recently developed extension of the CONSORT statement for herbal medicine trials. 2. A methodological review of proposed methods of assessing clinical heterogeneity in meta-analyses of randomized controlled trials, 3. The application of permutation based resampling in meta-regression of multiple covariates. An analysis of 406 RCTs of herbal medicine interventions revealed that these trials are regularly under reporting important aspects of the intervention. Next, the second project showed that there are many resources providing suggestions for investigating clinical heterogeneity in systematic reviews of controlled clinical trials and though there is minimal consensus some recommendations are common across sources. Finally, the third project found that permutation tests result in more conservative, larger, p-values potentially reducing the rate of false positive findings when exploring multiple covariates.

Keywords: heterogeneity
systematic reviews
Advisor: Bombardier, Claire
Toward a Postmodern Ethnography of Intercultural Theatre: an Instrumental Case-study of the Prague-Toronto- Manitoulin Theatre Project

This thesis examines collaborative intercultural theatre that brings artists from different parts of the world together to create original work. It includes a case-study of the Prague-Toronto-Manitoulin Theatre Project, a theatrical collaboration that took place between 1999 and 2006 and with which I was involved as a performer and facilitator. The thesis considers the case-study within historical context, particularly in relation to the ideas and experiments of influential twentieth-century practitioner-theorists such as Brecht, Artaud, Brook and Schechner. I distinguish between modernist and postmodernist traditions in intercultural theatre discourse by tracing how the latter arose in response to poststructural arguments in cultural theory. In recent decades, theatre practices have accommodated this redirection by being more mindful of politics and ethics. I argue that approaches to research and analysis have lagged behind, and that alternative approaches are needed that are better suited to address contemporary practices and issues. I borrow from critical traditions in Anthropology, Cultural Studies and Education to build up a postmodern ethnographic approach to my case-study of the Prague-Toronto-Manitoulin Theatre Project. At stake in the case-study is the extent to which the additional contextual knowledge available to a postmodern ethnographic approach contributes to theatrical analysis and interpretation. More concerned with the instrumental value of the case-study than its intrinsic properties, I use the data to demonstrate that a postmodern ethnography is well-suited to consider ethics of representation in an intercultural context, that is, what the possibilities and limitations of dialogue across cultural difference may be. This, I argue, is as important as ever in a world in which intercultural encounter is common and cultural performance circulates with increasing fluidity and ease.

Keywords: Theatre
Intercultural
Advisor: Gallagher, Kathleen
Studies of Laser Ablation of Liquid Water Under Conditions of Impulsive Heat Deposition Through Vibrational Excitations (IHDVE)

A new laser ablation mechanism of liquid water based on recent insights into its hydrogen bond dynamics has been studied and several applications of the ablation demonstrated. The mechanism, termed as Impulsive Heat Deposition through Vibrational Excitations (IHDVE), is based on the ability of the hydrogen bond network of water to rapidly thermalize vibrational O-H stretch excitations on a time scale of several picoseconds even for excitation intensities that are large enough to bring excited volumes far into the supercritical region. In this way, by using vibrationally resonant picosecond infrared laser pulses with sufficient energy, it is possible to drive ultrafast phase transitions in the excited water volume leading to a rapid and efficient ablation process of water and water rich targets with minimum perturbation of solute molecules of interest. The physics behind the IHDVE ablation process is outlined and the benefits of the IHDVE ablation are demonstrated for two important applications of tissue cutting and mass spectrometry of biomolecules. Finally, the development of two high power infrared laser systems suitable for the practical implementation of IHDVE is presented.

Keywords: laser surgery
mass spectrometry
Advisor: Miller, R. J. Dwayne
La structure du prédicat verbal : une étude de la construction à double objet en français

The present thesis addresses the issue as to why the double object construction (e.g., John gave Mary a book) seems to appear in certain languages but not in others. This construction has received much attention in past research in formal linguistics and has played a central role in developing our understanding of the internal structure of the VP. Previous studies generally define the construction with respect to relative linear order of the object complements of the verb and the lack of morphological markings on these objects. We show that these properties are not inherent to the construction and that consequently, the construction exists in a wider variety of languages than previously assumed, particularly French. Along the lines of Goldberg (1995, 2006), we develop a universal semantic definition of the construction, which may be used as a diagnostic to test, systematically and categorically, its presence across languages. In particular, we identify the double object construction in French as, for example, Jean a donné le livre à Marie. We then explain the cross-linguistic structural differences with a Case-driven approach. Specifically, we argue that the inherent dative Case, present in French but not in English, is responsible for the structural differences recognized between the languages. By adopting a minimalist derivation of argument structure (Chomsky 1995, 2000, 2004) and the applicative analysis (Pylkkänen 2002), we are able to determine the syntax of the construction, while eliminating the redundancies and limitations of previous accounts. We present certain resulting predictions related to the grammar, including a generalisation of Case-checking by the low applicative phrase, a syntactic position related to the direct object properties, and universal properties of the construction itself. In all, this thesis offers empirical evidence for the universality of the double object construction and Case-driven syntactic derivation.

Keywords: French
syntax
verbs
argument structure
linguistics
double object construction
applicatives
universal grammar
Minimalism
ditransitives
Advisor: Roberge, Yves
Optical Spectroscopy of Mass-selected Ions in the Gas Phase

Optical spectroscopy combined with mass spectrometry provides a unique opportunity to probe the intrinsic properties of biologically-relevant ions in the gas phase, free from the interfering effects of solvent interactions in the condensed phase. Electrospray ionization allows large biomolecules to be transferred intact into the gas phase for mass analysis. Modern mass spectrometers provide excellent sensitivity, mass-resolution and can efficiently isolate a single ionic species from a complex mixture. However, the extent to which biomolecules retain their solution-phase conformations in the gas phase is largely unknown. Therefore, there is considerable interest in applying spectroscopic methods to biological ions in vacuuo. Due to the low number densities of ions in storage devices, traditional absorption measurements are not feasible, requiring more sensitive analytical methods. Two such techniques are laser-inducedfluorescence (LIF) and photo-dissociation (PD) action spectroscopy, both of which measure the consequence of absorption. The work in this dissertation describes applications of optical spectroscopic methods to interrogate mass-selected ions using a variety of ion storage apparatus including a Fourier transform ion cyclotron resonance mass spectrometer, a quadrupole ion trap and an electrostatic ion storage ring. First, the conformations of small cationized arginine complexes have been investigated using infrared multiple-photon dissociation (IRMPD) action spectroscopy in the IR fingerprint region of the spectrum (200-1800 cm-1). Second, an apparatus incorporating a quadrupole ion trap has been constructed in our laboratory to perform LIF and PD-action spectroscopy. The gas-phase fluorescence and photodissociation properties of three Rhodamine dyes have been investigated including fluorescence excitation and dispersed fluorescence spectra. Finally, the latter chapters describe the use of electronic action spectroscopy to investigate a model chromophore of the green fluorescent protein (GFP), p-hydroxybenzylidene-2,3-dimethylimidazolone (HBDI). The body of work in this dissertation highlights the integration of gas-phase spectroscopy and mass spectrometry to elucidate the fundamental photophysical properties of biological and related ions.

Keywords: mass spectrometry
optical spectroscopy
gas-phase
fluorescence
photodissociation
stored ions
Advisor: Jockusch, Rebecca A.
The Kuh-Ke-Nah Broadband Governance Model: How Social Enterprise Shaped Internet Services to Accommodate Indigenous Community Ownership in Northwestern Ontario, Canada (circa 1997 to 2007)

This thesis articulates how the Kuh-Ke-Nah network (K-Net) shaped broadband development in remote indigenous communities. K-Net operates under the not-for-profit stewardship of Keewaytinook Okimanak (KO) Tribal Council. Located in Northwestern Ontario, KO brought K-Net to life amongst its six member First Nations in the mid 1990s. As K-Net evolved and expanded its membership, KO established a governance model that devolves network ownership and control to community networks in partner First Nations. This governance model reflects KO’s use of social enterprise to organize K-Net’s community-based broadband deployment amidst necessary partnerships with government programs and industry players. K-Net’s social enterprise has rapidly grown since 1997, when its core constituents fought for basic telephone service and internet access in Northern Ontario. In the space of less than a decade, K-Net communities have gone from a situation in which it was common for there to be but a single public payphone in a settlement, to a point where over thirty now have broadband internet services to households. Technologies now under K-Net control include a C-Band satellite transponder, IP videoconferencing and telephony, web and email server space, and a variety of terrestrial and wireless links that effectively connect small, scattered First Nations communities to each other and the wider world. K-Net’s governance model encourages member communities to own and control community local loops and internet services under the authority of a local enterprise. Community ownership and control over local loops allows First Nations to collaborate with KO to adapt broadband applications, such as telemedicine and an internet high school, to local challenges and priorities. K-Net’s aggregation of demand from disparate users, within and across member communities, creates economies of scale for the network’s social enterprise, and allows a dynamic reallocation of bandwidth to meet social priorities. Based on four years of research with K-Net stakeholders under the Canadian Research Alliance for Community Innovation and Networking (CRACIN), my thesis documents the evolution of K-Net’s governance model as a reflection of its social enterprise. Drawing from Community Informatics and the Ecology of Games, I trace K-Net’s history and organization to assess how KO, its partners, and K-Net’s constituents, cooperated to make social enterprise viable for member First Nations.

Keywords: broadband
social enterprise
governance
indigenous
community informatics
internet
ecology of games
telecommunications
public private partnerships
Canada
Advisor: Clement, Andrew
Morphology and Interfaces in Polymer Blends Studied by Fluorescence Resonance Energy Transfer (FRET)

This thesis describes a fundamental study of the miscibility and the nature of the interface between components of core-shell polymer blends using the technique of Fluorescence Resonance Energy Transfer (FRET) coupled with data analysis that involves Monte-Carlo simulations. Our aim in this study was to develop a fundamental methodology to quantitatively determine the width of the interface between the two components in binary polymer blends. At the current state of the art, data analysis of FRET experiments requires translational symmetry. In the system under study, uniform core-shell structures satisfy this criterion. Thus, in this work our focus was directed toward the study of a blend system with a core-shell structure. For this FRET study, I have identified a number of potential donor and acceptor dye pairs that fluoresce in the visible range of the spectrum and can be chemically attached to polymers. Among them, I selected, as the donor and the acceptor, a pair of naphthalimide dyes that have not previously been used for FRET experiments. Model experiments showed that while the fluorescence decay profile of the donor chromophore was exponential in solution, it was not exponential in polystyrene (PS) or poly(methyl methacrylate) (PMMA) films. Thus, I carried out refinements to existing FRET theory to interpret the data generated by using these dyes. Also, I derived a new model to predict the fluorescence intensity of non-exponential decaying donor dyes in core-shell systems. I selected a model system composed of a PS core surrounded by a PMMA shell. The PS core particles were prepared by miniemulsion polymerization to obtain cross-linked PS particles with a narrow size distribution. Seeded emulsion polymerization under starved-fed condition was employed to synthesize monodisperse dye-labeled core-shell particles. The extent of miscibility and the nature of interface between the core and the shell polymers were retrieved from a combined study by Monte-Carlo simulations and analysis of the donor fluorescence intensity decays. Agreement between the retrieved interface thickness and the literature data on PS-PMMA validates the methodology developed here for the use of such donor dyes in FRET studies on polymer blends.

Keywords: FRET
Core Shell Polymer Blend
Interface Thickness
Miscibility
Advisor: Winnik, Mitchell A.
An Exploration of the Impact on Individuals Who Have Experienced Multiple Losses From Death Over Time

The study explores the experience of individuals who have lost a number of close people in their life, through death, over the course of their adult lifetime. Twelve individual interviews (11 women, 1 man) are presented in narrative form and explored for their content and meaning. The experience of multiple loss was revealed to be unique and varied for each participant and each loss was experienced independently from the others, concomitant on the relationship to the deceased, the nature and timing of the death and the relevance to the participant’s identity. Similar themes occurred across and within cases that are attributable to having lost a number of close others. Common effects were seen in participants’ experiential knowledge of grief and its vicissitudes, death and its processes, and life and its meaningfulness. Participants believed that their losses have had a profound effect on them, changing their lives immutably. Changes were perceived in terms of impact on the way they view the world, themselves and their relationships. Individuals perceived both positive and negative effects. Analogous with current research and theories in the field many of the participants reported experiencing personal growth as a result of their losses. The present study extends past research findings by attributing these effects to the accumulation of losses. A model for understanding the process of meaning-making in multiple loss was devised. Respondents were apt to process one death at a time, incorporate its meanings and effects on them, compare the effects to each other by contrasting the distinct experiences, and create a framework for meaning that was mutable. There were typical features of these meanings that were characteristic to the tone of the narrative. Stories of multiple loss tended to have an unresolved, a transformational or a growth related tone. An enhanced model of meaning- making in loss is described that augments current models of meaning-making in coping with loss. The implications of these findings for theory and practice are discussed.

Keywords: multiple losses
bereavement
meaning-making in loss
narrative research
Advisor: Chen, Charles
Modeling of and Driver Design for a Dielectric Barrier Discharge Lamp

Dielectric Barrier Discharge (DBD) excimer lamp is a very attractive source for Ultraviolet (UV) radiation. It has a number of advantages compared to the mercury lamp which is the main lamp used in the industry for UV production. Some of these advantages are instant UV radiation (no warm-up period), narrow UV spectrum, longer life times and simple construction. The DBD UV lamp can be used in number of applications like water disinfection, Plasma Display Panels (PDP) and surface treatment in the semiconductor industry. Yet, the full industrial application of this lamp still faces some problems mainly related to finding the optimum electrical driver to maximize the efficiency of such a lamp. This includes the type of the electrical waveform to generate and the power electronic driver to produce it. In this thesis, firstly a physically based circuit model for the DBD lamp using the Finite Volume Method (FVM) is developed. This model provides the electrical and optical characteristics of the lamp. Using this model the sensitivity of the lamp efficiency to the proposed electrical waveform has been determined. Secondly, the order of this FVM model has been reduced to obtain a model which is used in the design procedure of the proposed driver. Since the DBD lamp has a capacitive nature, a current controlled driver is proposed in this thesis as opposed to most of the published drivers which are voltage controlled drivers. The design of this driver is intended to enhance the electrical to optical efficiency of the lamp and therefore enhancing the overall efficiency of the system. The driver topology permits direct control of the peak lamp current and the operating frequency of the supplied current to the DBD lamp. The width of the current pulses is determined by the transformer magnetizing inductance and the lamp capacitance. Experimental results of the proposed driver connected to a XeCl DBD lamp are presented to validate the performance of the driver and to prove the concept of such a current controlled driver. The proposed driver performance is compared to a voltage source driver which was also implemented. The proposed driver produced higher overall system efficiency but at the expense of a reduction in the driver efficiency as compared to the voltage source driver. The complete system, which consists of the developed FVM based model and the equivalent circuit of the proposed driver, was simulated and the results were compared to the experimental results to validate the accuracy of the developed model for the DBD lamp.

Keywords: Plasma Modeling
Power Electronics
Finite Volume Method
Dielectric Barrier Discharge
Advisor: Dawson, Francis P.
Lavers, John Douglas