VictorJuiz/thesis huggingface dataset:
The Social Organization of the Ontario Minimum Wage Campaign
Keywords: labour-community coalitions
race, gender, class
social relations
workers rights

My dissertation research is interdisciplinary in nature, at the nexus of three areas of scholarly work and actual practices: union renewal and non-unionized workers-rights organizing in Canada and the US; feminist, anti-racist Marxian approaches to class relations as being racialized, gendered and bureaucratic; and, the institutional ethnographic method of inquiry into social reality. My empirical focus is on the Ontario Minimum Wage Campaign (OMWC). The OMWC was a Toronto-based labour-community project to raise the minimum wage to $10 per hour. It was started in 2001 by Justice for Workers (J4W), was carried on by the Ontario Needs a Raise coalition (ONR) from 2003 to 2006, and was re-launched in 2007 by the Toronto and York Region Labour Council (TYRLC) in association with some community groups. The OMWC brought together across time and space activist groups, community agencies and labour organizations, all of whose volunteers, members, clients, educators, officials and staff were the agents and/or targets of the campaign. The apparent victory of the OMWC is quite contested. Local campaign realities were compartmentalized in numerous ways and OMWC involvement met different institutionally specific and coordinated needs. And while coalitions generally arise as vehicles to transcend such institutional separation, the campaign was challenged to materially bridge such compartmentalization. The fragmentation of reality amongst institutions and how it was managed in practice affected how collaboration, participation, and decision-making happened and appeared to have happened in organizing and educational activities. While there were at times transformative intentions, there was generally a pragmatic anti-racist organizing practice and effect. I contend that the complexity of contemporary society poses great challenges for the possibilities for human-agency based labour-community workers-rights organizing with a broad-based, political capacity for movement building orientation. I suggest that this is largely so because the social coordination of what we do and what we understand about what we do turns on at least three components of social reality: an institution-based organization of multi-layered social relations that is generally locally circumscribed but extralocally driven; a conditioned individually-driven orientation to meeting human needs; and an ideological orientation to both the content of ideas and thought, and the process of that reasoning.
The Impact of the Grameen Bank upon the Patriarchal Family and Community Relations of Women Borrowers in Bangladesh
Keywords: Grameen Bank
women empowerment
community development
patriarchy
community space
micro credit

The purpose of the study is to: (1) examine the degree to which women borrowers of the Grameen Bank are being empowered to participate in familial decision-making around the management of income and expenditures like food, children’s education, dowry and teenage marriages; and (2) to examine women borrowers’ engagement in community activities such as the degree of freedom women are granted to visit public places like schools, local councils, banks and markets. In particular, the study explores the role of the Grameen Bank (GB) in women’s empowerment through the Sixteen Decisions, an educational program designed to empower women in the family and community. This study used a mixed-methods research design that included 61 GB women borrowers selected through purposive sampling. The data suggest that the participants have assumed leadership roles within their families: more than 80% of the study’s participants led decision making within their family; more than 90% supported their children’s education financially; 91% reported that they worked together with family members to manage day-to-day expenses; 80% reported that they manage their family incomes; 98% reported they do not like dowry marriages and teenage marriages; and 33% view male-dominant values as a hindrance to women’s development. The findings indicated that 98% of GB women borrower participants are engaged in community organizations and 94% do not face problems with this engagement. In the 2009 UpZilla (Municipal Sub-district) Election, out of 481 seats, 114 Female Chairs (25% of the total) were elected from the GB women borrowers and their families (Grameen Bank, 2009). In addition, the number of women borrowers serving as councilors has increased from 1,572 in 1997 to 1,950 in 2003; these data indicate that the number of women borrowers acting in formal leadership roles is increasing (Grameen Bank, 2009). The study finds the GB program has had a positive impact upon the borrowers’ relations in the family and community. In spite of these developments, one-fifth of GB women borrowers’ husbands control their wives’ loan money, an indication of the strength of patriarchy in Bangladesh. Although GB’s Sixteen Decisions have included economic issues and other social issues, none directly discusses gender inequality, which the study findings suggest is important. Hence a revision of the Sixteen Decisions is suggested.
Full-band Structure Calculations of Optical Injection in Semiconductors: Investigations of One-color, Two-color, and Pump-probe Scenarios
Keywords: bilayer graphene
carrier dynamics
carrier injection
chi(3)
coherent control
current injection
GaAs
gallium arsenide
Ge
germanium
graphene
nonlinear optics
optical injection
optical orientation
quantum interference
spin current injection
spin dynamics
spin injection

Carrier, spin, charge current, and spin current injection by one- and two-color optical schemes are investigated within 30-band k·p theory. Parameters of the band model are optimized to give full-Brillouin zone band structures for GaAs and Ge that give accurate Γ-point effective masses and gyromagnetic factors and give access to the L valley, and to the E₁ and E₁+Δ₁ critical points in the linear optical absorption. Calculations of one- and two-photon carrier and spin injection and two-color current injection are performed for excitation energies in the range of 0—4 eV in GaAs and 0—3.5 eV in Ge. Significant spin and spin current injection occurs with 30% spin polarization in GaAs and Ge at photon energy matching the E₁ critical point. Further, the anisotropy and disparity of the current injection between parallel and perpendicular linearly-polarized beam configurations are calculated. For light propagating along a <111> crystal axis, anisotropic contributions in coherent current control and two-photon spin injection give rise to normal current components and in-plane spin components. In Ge, contributions from the holes to spin, electrical current, and spin current injection are investigated. Optical orientation results in 83% spin-polarized holes at the band edge. The effects of carrier dynamics in Ge are treated within a rate-equation model. The detection of spin dynamics in a pump-probe setup is considered, and the Fermi-factor approach is justified for electrons but not for holes. Carrier and current injection are further investigated in single-layer and bilayer graphene within the tight-binding model. In single-layer graphene, the linear-circular dichroism in two-photon absorption yields an absorption coefficient that is twice as large for circularly polarized light compared to linearly polarized light. Coherent current injection is largest for co-circularly polarized beams and zero for cross-circularly polarized beams. For linearly polarized beams, the magnitude of the injected current is independent of beam polarizations. In contrast, the injected current in bilayer graphene shows disparity between parallel and perpendicular configurations of the beams. The resulting angular dependence of the current is a macroscopic, measurable consequence of interlayer coupling in the bilayer.
Injuries Among Elderly Canadians: Psychotropic Medications and the Impact of Alcohol
Keywords: epidemiology
public health
injuries
psychotropic medications
alcohol
National Population Health Survey
longitudinal
antidepressant medications
SSRI medications
benzodiazepines
antianxiety medications
hypnotics
sedatives
drinking
geriatrics
seniors
accidents
NPHS

Psychotropic medication use is widely implicated as a risk factor for injuries, and it is believed that the adverse effect profiles of these medications are exacerbated by the consumption of alcohol. The objectives of this study are (a) to examine the associations between the use of specific classes of psychotropic medications and injuries among elderly participants of the National Population Health Survey (NPHS), and (b) to determine whether and how associations between psychotropic medications and injuries are modified by the consumption of alcohol. Data from Cycles 1 (1994/95), 2 (1996/97), and 3 (1998/99) of the NPHS household longitudinal file were used in this study, selecting community-dwelling participants aged 65 years of age and older in 1994/95. Among antidepressant medications, the magnitude of the risk of injuries was higher for users of tricyclic derivatives (OR=1.4; 95%CI: 0.7 – 2.9) than SSRIs (OR=0.3; 95%CI: 0.1 – 1.0). Benzodiazepine use for any indication increased the risk of injuries, but that effect was not consistent across indications. The use of benzodiazepine antianxiety medications resulted in an increased risk of injuries (OR=2.0; 95%CI: 1.3 – 3.1), but there were no significant effects on the injury risk among benzodiazepine hypnotic and sedative users (OR=0.8; 95%CI: 0.4 – 1.7). Results pertaining to the second objective of this study raised as many questions as they resolved. Alcohol consumption decreased the odds of injury among hypnotic and sedative users, but otherwise, no consistent results were observed. Findings from this study underscore the importance of identifying appropriate alcohol measures for research among elderly populations. They also stress the need to separately consider the impact of different classes of psychotropic medications on injuries (tricyclic antidepressants separate from SSRI antidepressants and antianxiety benzodiazepines separate from hypnotic and sedative benzodiazepines).
Effects of Single-tree Selection Harvesting on Rose-breasted Grosbeaks (Pheucticus leudovicianus) in a Predominantly Forested Landscape
Keywords: Forestry and Wildlife

Single-tree selection harvesting is frequently used in the tolerant hardwood forests of North America but relatively little is known about how this silvicultural system affects wildlife, including many avian species. I investigated Rose-breasted Grosbeak (Pheucticus leudovicianus) habitat use, survival, and nestling provisioning behaviour in twelve hardwood stands in Algonquin Provincial Park which had been harvested by single-tree selection 0-5, 16-20, 21-25, and > 50 years previously. Density, pairing success, and the number of fledglings per successful nest were all significantly lower in the > 50 years post-harvest stands than in at least one other post-harvest treatment. Density and pairing success were significantly higher in the 16-20 year post-harvest stands than in other treatments. Neither nest nor fledgling survival differed significantly among post-harvest treatments, but all stands were population sinks except those cut 16-20 years previously. Nests that were initiated earlier in the season and built in areas with higher basal area were more likely to survive, whereas fledgling survival increased with days since fledging. Nest sites had higher cover from regenerative growth, saplings, and understory, and lower basal area than random locations. During their first week out of the nest, fledglings used locations with significantly higher cover from regenerative growth, saplings, small shrubs, and raspberry and elderberry bushes than were present at random locations. Habitat characteristics at nest and fledgling locations were significantly different, and estimates of nest and fledgling survival were not correlated among harvested stands. Nests attended by after-second-year (ASY) males were initiated significantly earlier, and territory density and productivity were significantly higher for ASY males than for second-year (SY) males. Nestling provisioning rates, male contribution to nestling provisioning and nest attendance, and mean nestling weights at the time of fledging were also significantly higher at nests attended by ASY males than at nests with SY males. This study found that single-tree selection did not have significant negative effects on Rose-breasted Grosbeaks breeding in a predominantly forested landscape, but like many other species of birds, experienced breeders were more successful than less experienced breeders were.
Development of the Fetoplacental Vascular Tree in Mice During Normal and Growth Restricted Pregnancies
Keywords: placenta
vasculature
fetoplacental
mouse
intrauterine growth restriction
pregnancy
micro-computed tomography
imaging
automated vascular segmentation
hemodynamics
mouse strains
arterial tree

The geometry of an organ’s vascular system determines the blood flow distribution to tissues for exchange of gas and nutrients by determining its vascular resistance. The importance of vascular geometry is evident in the placenta, where insufficient fetoplacental vascularity elevates vascular resistance thereby impairing perfusion, leading to one of the most common and severe pregnancy complications, intrauterine growth restriction (IUGR). The mouse is becoming a widely used model for human placental development due to the increasing availability of mouse models thought to have a placental defect. Vascular geometry can now be imaged and quantified using micro-computed tomography (micro-CT) and results used to estimate resistance to blood flow. This thesis first describes the implementation of contrast agent perfusion and micro-CT imaging of the mouse fetoplacental vasculature throughout late gestation. Application of a vascular segmentation technique is then described and evaluated for quantification of the arterial fetoplacental tree. Normal fetoplacental vascular development in late gestation is described for two common mouse strains, CD1 and C57Bl6 (B6). In B6 placentas, both late gestational capillary growth and thinning of the interhaemal membrane were blunted relative to CD1. Analysis of CD1 and B6 tree geometry revealed a constant number of arterial segments throughout late gestation in both strains but expansion of arterial diameters in B6 only, resulting in decreased B6 arterial resistance and shear stress in late gestation. Strain dependence shows the importance of genetics in fetoplacental vascular development. Quantification of the arterial tree in a mouse model of maternal pre-pregnancy exposure to chemicals commonly found in cigarettes revealed an increase in vascular tortuousity and a reduced number of arteriole sized vessels. This led to an increase in vascular resistance and a predicted decrease in blood flow, which could contribute to the observed reduction in fetal weights. In future studies, the methods described herein can be used in phenotyping numerous mouse models which currently are suspected to have a placental vascular defect.
Sounding the Past: Canadian Opera as Historical Narrative
Keywords: music
musicology
Canadian history
opera
historiography
narrative

The intriguing parallels between musical and literary forms have long been a focus of musicological inquiry, particularly in recent debates concerning music’s narrative properties. However, parallels between musical and historical forms and processes remain under-examined. Indeed, while historically-based operas continue to be prominent in the repertoire, there has been little if any attempt to interrogate how the unique structural, temporal, and narrative dimensions of the operatic form might render a representation of the past that is unique in comparison to those in other modes. This dissertation takes up this issue, and probes it on musical and aesthetic levels, asking the following questions: Given recent inquiries into history’s creative nature in historiography, what kind of historical account does opera represent? What elements of historical experience, knowledge, or memory are accessed in these works? How do music’s temporal, dramatic, and narrative dimensions interact with what we presume to be the objective realm of history? And most importantly: Can these works be seriously considered historiographical in any sense? In this dissertation, I investigate these questions with a focus on Canadian historically-based opera specifically. Applying a hermeneutical approach that connects current threads in musicology, narrative theory, theory of the sublime, film theory, and philosophy of history, I define and theorize the powerful discourse that music contributes to Canadian historiography in six of Canada’s most prominent historically-based operas: Harry Somers and Mavor Moore’s Louis Riel (1967); Harry Somers and James Reaney’s Serinette (1991); John Estacio and John Murrell’s Filumena (2005) and Frobisher (2007); and Istvan Anhalt’s Winthrop (1986) and La Tourangelle (1975). The conclusions of this study are, however, not limited to this repertoire. Rather they are applicable to the canon of historically-based works as a whole, and speak directly to some of the most critical and current aesthetic issues in musicology and historiography. As an art form that reopens the space between past and present by reaffirming history’s subjective and temporal nature, and by exploring the ephemerality it shares with living memory, opera validates itself as a truly distinct historiographical mode.
Timpani: New Suggestions for Excerpt Practice Based on a Survey of Literature
Keywords: Music
Timpani

This dissertation examines and critiques timpani instruction literature with a focus on timpani technique. It begins with an historical account of the origins of modern timpani. What follows is a look at the development of technique through documented timpani instruction beginning with Johann Ernst Altenburg’s treatise from 1795. Based on material examined in a literature survey of instructional texts from the twentieth and twenty-first centuries, an examination of basic timpani technique and symphonic repertoire is presented in relation to discussions with four professional timpanists. Ian Bernard (Former Principal Timpanist of the National Arts Centre Orchestra), Tom Greenleaves (Leipzig Gewandhaus Orchestra), Brian Jones (Dallas Symphony Orchestra) and Benedickt Leithner (Deutsche Oper Berlin) all comment on timpani instruction literature, discuss ways it could be enhanced, and share their opinions on technique. Conclusions are drawn challenging the efficacy of timpani instructional literature with particular emphasis on lacunae. In a brief appendix, selected material from violin and trumpet literature is discussed in relation to timpani literature. A second appendix offers new suggestions for technical development related to orchestral timpani parts.
Kinematic Optimization in Birds, Bats and Ornithopters
Keywords: Ornithopter
Unsteady aerodynamics
Aeroelasticity
Bird
Bat
Flapping wing flight
Optimization
Kinematics
Vortex panel method
Non-linear finite element
Propulsive efficiency

Birds and bats employ a variety of advanced wing motions in the efficient production of thrust. The purpose of this thesis is to quantify the benefit of these advanced wing motions, determine the optimal theoretical wing kinematics for a given flight condition, and to develop a methodology for applying the results in the optimal design of flapping-wing aircraft (ornithopters). To this end, a medium-fidelity, combined aero-structural model has been developed that is capable of simulating the advanced kinematics seen in bird flight, as well as the highly non-linear structural deformations typical of high-aspect ratio wings. Five unique methods of thrust production observed in natural species have been isolated, quantified and thoroughly investigated for their dependence on Reynolds number, airfoil selection, frequency, amplitude and relative phasing. A gradient-based optimization algorithm has been employed to determined the wing kinematics that result in the minimum required power for a generalized aircraft or species in any given flight condition. In addition to the theoretical work, with the help of an extended team, the methodology was applied to the design and construction of the world's first successful human-powered ornithopter. The Snowbird Human-Powered Ornithopter, is used as an example aircraft to show how additional design constraints can pose limits on the optimal kinematics. The results show significant trends that give insight into the kinematic operation of natural species. The general result is that additional complexity, whether it be larger twisting deformations or advanced wing-folding mechanisms, allows for the possibility of more efficient flight. At its theoretical optimum, the efficiency of flapping-wings exceeds that of current rotors and propellers, although these efficiencies are quite difficult to achieve in practice.
Effects of Natural Genetic Variation in the foraging Gene on Learning and Memory Phenotypes in the Fruit Fly Drosophila melanogaster
Keywords: Behaviour
Genetics

This thesis examines how natural variation in the foraging gene (for) of Drosophila melanogaster influences several learning and memory phenotypes in adult flies. These studies are undertaken using aversive olfactory associative conditioning paradigms. Novel approaches to standard Pavlovian conditioning paradigms are used in order to test hypotheses that were formulated based on what is known concerning movement- and feeding-related behaviour in the rover (forR) and sitter (fors) variants of for. The results show that natural variation in for, which is thought to have been under balancing selection in the wild, influences adult learning and memory traits appreciably. More specifically, forR flies, who are exposed to greater environmental heterogeneity than sitters, display retroactive interference. As might be expected from their foraging behaviour, rover responses are biased towards more recent learning events. Additionally, results indicate that individual performance in a learning task was affected by allelic variation in for and through pharmacological manipulations of PKG activity levels. Interestingly, in fors, but not forR, the acquisition of information was facilitated by social interaction (i.e. being in a group). In forR, but not in fors, the type of social interaction (being with other forR or with other fors) affected learning and memory. Also, naive individual forR flies tended to follow groups of conditioned fors but not groups of conditioned forR. In several other chapters, the thesis explores recent issues in behaviour genetics. In particular, the following concepts are explored: 1) the fruit fly as model for ecological and evolutionary studies; 2) cGMP-dependent protein kinase as a modifier of behaviour in disparate species; and 3) conservation of gene function in behaviour.