VictorJuiz/thesis huggingface dataset:
Understanding Private Law's Remedies
Keywords: "private law"
remedies

The fundamental question of private law’s remedies is how do subsequent remedial actions rationally address prior failures. This question can be approached either intrinsically or extrinsically. While the former justifies and explains the remedial action from within the original plaintiff-defendant relationship, the latter welcomes external principles and goals. The arguments of this thesis fit within an intrinsic approach to private law’s remedies. To this end, several arguments are levied against the extrinsic perspective, and, in particular, its confidence in the separation of rights and remedies. For positive inspiration, it looks to two leading intrinsic theoretical accounts—those of Ernest Weinrib and John Gardner, respectively—with an eye to revealing what, if any, meaningful differences there are between the two. Using the language and logic of practical reasons and reasoning, this dissertation suggests that remedies can be understood in one of two ways. First, the remedy is just the same as the original reason. If I fail to pay my debt on the date it is due, my subsequent remedial action in paying it later is carried out because of the original reason, namely, that I owe a debt to someone. Second, the remedy is a reflection of certain second-order reasons that are part of the original (operative) reason. These are reasons not to act for certain other reasons that counsel against the performance of the first-order reason to do the obligatory action. These reasons stick around and tell you to do something; that doing nothing is not optional. If I break your toe, I can no longer satisfy the original reason not to break your toe; however, I can and must do something to address my initial failure. The content of this reparative action is constrained by the original reason not to break your toe. While its first-order strength is no longer available—one can no longer act for the reason it recommends—it can nonetheless provide guidance with respect to what the next-best thing might be.
The Evolutionary and Ecological Consequences of Partner Variation in the Mutualism between Legumes and Symbiotic Nitrogen Fixing Bacteria
Keywords: evolutionary ecology
mutualisms
legume
Rhizobia
nitrogen-fixation
microbial symbiont
exploiter
cheater
herbivory
competition
selection
context-dependency

A fundamental goal in ecology and evolutionary biology has been to understand how microevolutionary forces affect the origin and maintenance of mutualisms over ecological and evolutionary time scales. Mutualistic partners vary in the reciprocal benefits they provide, yet the role of partner variation on microevolutionary forces that impact the maintenance of mutualisms is unclear. Using the mutualism between legumes and nitrogen fixing symbionts, my dissertation investigated the ecological and evolutionary consequences of variation in partner quality. In the first experiment, I demonstrate how insect herbivory can change the costs and benefits of associating with exploiters, and that some degree of exploitation from non-beneficial rhizobia can reduce insect herbivory, thus removing the fitness advantage of associating purely with beneficial rhizobia. In the second study, I examine how rhizobia genotype modifies competition between hosts grown in kin and non-kin groups. I show that lower fitness in plant kin groups can simply be a by-product of genetic variance in plant size and non-linear relationships between plant size and fitness. I further show that the symbiotic community can change difference in fitness between kin and non-kin groups independent of these by-product effects. In my last chapter, I provide the first empirical evidence that an important mechanism for mutualism stability-- the ability for hosts to preferentially associate with beneficial rhizobia-- is genetically variable and can evolve in response to exploitation. I also show that host preference for beneficial rhizobia can be maintained in legume populations, even in the absence of exploitation. My dissertation provides insight into the potential evolutionary dynamics of stabilizing mechanisms by suggesting that the agents of selection that affect the level of host exploitation can come from biotic factors other than the exploiters themselves. My dissertation has also shown that inclusion of other ecological interactions, such as herbivory, can provide valuable perspective on fitness effects of symbionts on their hosts, and can even change our fundamental assumptions about the effects of exploitation on host fitness, which has formed the backbone of mutualism theory.
B Cell Development: The Impact of the Environment
Keywords: B cell development

B lymphocytes develop from pluripotent stem cells, and differentiate to plasma cells (PCs) in reaction to signals from the supportive microenvironment. Different sets of signals, which are derived from multiple sources such as soluble cytokines and cell-cell contacts, are required at different stages of development. For instance, murine B cell progenitors require the action of interleukin-7 (IL-7) in the early phase of their development in the bone marrow (BM). The necessity for IL-7 decreases as the cell matures, and this event is correlated with the appearance of CD22. The first two chapters of this thesis focus on the early stages of B cell development that take place in the BM. In chapter 1, I examine the IL-7 response and, although I do not show a specific role for CD22 in the loss of sensitivity to IL-7, my data suggest that cis interactions involving sialic acids might modulate the IL-7 response. This section is followed by the analysis of the effect of IL-21 on B cell progenitors in the BM. IL-21 is known to regulate the terminal stages of B cell differentiation. In collaboration with Dr. Danijela Konforte, I present evidence that B cell progenitors in the BM also express a functional IL-21 receptor and that stimulation of this receptor with IL-21 accelerates the maturation pace of B cells. I further demonstrate that proB cells stimulated with IL-21 and anti-CD40 can differentiate into immunoglobulin (Ig)-secreting cells, and discuss the possibility that IL-21 plays a role during inflammation for the development of B cell progenitors in peripheral lymphatic organs. Finally, in the last chapter, in collaboration with the laboratory of Dr. Gommerman, I investigate how the microenvironment can shape the development of B cells. It has been demonstrated by my collaborators that IgA+ PCs present in the gut produce iNOS and display traits commonly associated to the myeloid lineage, and in this chapter, I describe a co-culture system with BM and gut stroma to study the conditions that sustain the generation of IgA+iNOS+ cells. In particular, I show that the presence of microbial products is one of the key factors required for their development.
The Time-course of Lexical Influences on Fixation Durations during Reading: Evidence from Distributional Analyses
Keywords: reading
eye movements
distributional analysis
lexical processing

Competing models of eye movement control during reading disagree over the extent to which eye movements reflect ongoing linguistic and lexical processing, as opposed to visual/oculomotor factors (for reviews, see Rayner, 1998, 2009a). To address this controversy, participants’ eye movements were monitored in four experiments that manipulated a wide range of lexical variables. Specifically, Experiment 1 manipulated contextual predictability by presenting target words (e.g., teeth) in a high-predictability prior context (e.g. “The dentist told me to brush my teeth to prevent cavities.”) versus a low-predictability prior context (e.g., “I'm planning to take better care of my teeth to prevent cavities.”), Experiment 2 manipulated lexical ambiguity by presenting biased homographs (e.g., bank, crown, dough) in a subordinate-instantiating versus a dominant-instantiating prior context, and Experiments 3A and 3B manipulated word frequency by contrasting high frequency target words (e.g., table) and low frequency target words (e.g., banjo). In all four experiments, I used distributional analyses to examine the time-course of lexical influences on fixation times. Ex-Gaussian fitting (Staub, White, Drieghe, Hollway, & Rayner, 2010) revealed that all three lexical variables (i.e., predictability, lexical ambiguity, word frequency) were fast-acting enough to shift the entire distribution of fixation times, and a survival analysis technique (Reingold, Reichle, Glaholt, & Sheridan, 2012) revealed rapid lexical effects that emerged as early as 112 ms from the start of the fixation. Building on these findings, Experiments 3A and 3B provided evidence that lexical processing is delayed in an unsegmented text condition that contained numbers instead of spaces (e.g., “John4decided8to5sell9the7table2in3the9garage6sale”), relative to a normal text condition (e.g., “John decided to sell the table in the garage sale”). These findings have implications for ongoing theoretical debates concerning eye movement control, lexical ambiguity resolution, and the role of interword spaces during reading. In particular, the present findings provide strong support for models of eye movement control that assume that lexical influences can have a rapid influence on the majority of fixation durations, and are inconsistent with models that assume that fixation times are primarily determined by visual/oculomotor constraints.
Potential of Pharmaceuticals and Personal Care Products (PPCPs) as Nitrosamine Precursors during Drinking Water Disinfection
Keywords: Drinking Water Disinfection
Disinfection By-Products
Water Treatment
Environmental Engineering

N-nitrosamines are considered as a group of emerging disinfection byproducts (DBPs) with potential carcinogenicity at ng/L level. The presence of nitrosamines in drinking water is most commonly associated with chloramination of amine-based precursors. This research investigates the potential of amine-based pharmaceuticals and personal care products (PPCPs) as nitrosamine precursors under practical drinking water disinfection conditions, as well as some critical factors that may affect the nitrosamine formation via PPCPs. All of the twenty selected PPCPs were able to form the corresponding nitrosamines upon chloramine disinfection, and eight of them rendered molar conversions higher than 1 % under practical disinfection conditions. Ranitidine had the highest N-nitrosodimethylamine (NDMA) molar conversion among the tested PPCPs. A three-parameter kinetic model was proposed to describe and predict the NDMA formation from pharmaceuticals during chloramination in various water matrices. The model accurately reflected all three significant characteristics of the NDMA formation curve, including an initial lag phase, followed by a fast increase in NDMA formation, and eventually reaching a plateau. In lab-grade water, the NDMA formation from pharmaceuticals was affected by the Cl2:NH4-N mass ratio, pH, and prechlorination. The NDMA formation increased with the Cl2:NH4-N mass ratio, indicating an enhancement effect of dichloramine. The pH affected both the ultimate NDMA conversion and the reaction rate. The reaction rate is mainly determined by the level of non-protonated amine species, and it increased consistently with increasing pH. The ultimate NDMA conversion is limited by the level of dichloramine, and the maximum NDMA formation occurred in the pH range of 7 to 8. The application of prechlorination may increase or reduce the NDMA conversion, depending on the chlorine reactivity towards the amine group and its surrounding structures. Water matrix components can slow down the initial NDMA formation from selected pharmaceuticals most likely due to the formation of natural organic matter (NOM)-pharmaceutical complexes, while they had less impact on the ultimate NDMA molar conversion. The application of prechlorination may enhance the initial reaction by destroying the NOM-pharmaceutical complexes, but prolonged prechlorination may further inhibit the NDMA formation due to the binding between pharmaceuticals and NOM breakdown products.
Exploring Culturally Responsive and Relevant Pedagogy in Initial Teacher Education: A Critical Practitioner Reseach Study
Keywords: Teacher Education
Urban Studies
Equity Studies
Culturally Responsive and Relevant Pedagogy

This thesis is a critical practitioner research study of an innovative teacher education initiative: the Diverse Schools (DS) Initiative. The DS Initiative fuses two pedagogical approaches - culturally relevant pedagogy and culturally responsive teaching - into an approach they call Culturally Responsive and Relevant Pedagogy (CRRP). The DS Initiative uses CRRP as a theoretical framework for equity-based work in a university-school based partnership. This research considers the impact of the DS Initiative on teacher candidates’ and associate teachers’ practicum experiences. The twenty research participants (teacher candidates, associate teachers and administrators) interviewed reveal a spectrum of understanding of the DS Initiative, CRRP, and their overall implications for teacher education programs that extend beyond the DS Initiative. The research found that participants’ identities and practicum contexts greatly shaped their understandings and uses of CRRP. Many participants were unaware that the purpose of the DS Initiative was to create a shared theoretical understanding of CRRP among associate teachers and teacher candidates. However, most participants recognized the merits of an equity-focused university-school partnership for practicum, but believed it could be more effective if they were involved in developing the content of the DS Initiative. The participants’ narratives suggest that there is great value in creating a space to build on existing teacher candidate/associate teacher identities in equity-based initiatives. Participants emphasize the importance of delivering a university-school partnership program that is fluid and open to changing content, direction and goals to reflect the diversity of the participants. This study demonstrates the value and effectiveness of engaging participants in critical inquiry reflection to provide insight into content, goals, and clarity on teacher education initiatives. This research will be of interest to university faculty, administrators, and school staff wishing to examine practicum concerns in Initial Teacher Education (ITE) programs and seeking to address them using a collaborative university-school partnership model. Finally, this study contributes to the greater scholarly practitioner research conversations about equity and critical pedagogy, teacher identity, and the challenges stakeholders in teacher education need to note, reflect upon, and respond to in order to address the needs of our increasingly diverse students.
Understanding how the Implementation of the Specialist High Skills Majors Programs in Ontario Schools Contributes to Student Outcomes
Keywords: secondary schools
Specialist High Skills Majors program
program implementation
student outcomes

New programming, such as the Specialist High Skills Major has been implemented in Ontario as part of the Student Success Learning to 18 Strategy to increase secondary graduation rates. Yet it has been unclear if this type of programming is actually improving student outcomes. As a result, this study asks: How does the implementation of the Specialist High Skills Majors (SHSM) contribute to student outcomes? Sub-research questions inquire about the consistency of the SHSM across Ontario, which students the SHSM has the greatest impact on academic success and if participation in the SHSM increases students’ academic success as defined by credit accumulation, marks, and graduation. The conceptual framework in this study is an amended version of Fullan’s (2007) critical factors that affect policy implementation. The study’s methods first included reviewing Ontario School Information System data on student achievement in the SHSM program. Interviews with thirty-four people also took place in eight schools from a mix of four geographically diverse Catholic and public school districts in Ontario that had high student enrollment in the SHSM program. While there were many findings within this study, four were key. The first finding was that there was great consistency to some aspects of implementing the SHSM program province-wide when there was top-down direction, while there was also great variability in other areas where there was increased flexibility. The second key finding centers around the role of leadership, including effective styles of leadership, consistency in leadership, and the importance of delegating leadership responsibility. The third finding highlights the importance of resources in implementing change. The last finding discusses the type of SHSM student that is most successful in the SHSM program and how program implementation directly affects student success.
Reliable Approximate Solution of Systems of Delay Volterra Integro-differential Equations
Keywords: Delay Integro-Differential Equations
Error Control
Numerical Software
Continuous Approximate Solutions

Ordinary and partial differential equations are often derived as a first approximation to model a real-world situation, where the state of the system depends not only on the present time, but also on the history of the system. In this situation, a higher level of realism can be achieved by incorporating distributed delays in the mathematical models described by differential equations which results in delay Volterra integro-differential equations (denoted DVIDEs). Although DVIDEs serve as indispensable tools for modelling real systems, we still lack efficient and reliable software to approximate the solution of systems of DVIDEs. This thesis is concerned with designing, analyzing and implementing an efficient method to approximate the solution of a general system of neutral Volterra integro-differential equations with time-dependent delay arguments using a continuous Runge-Kutta (CRK) method. We introduce an adaptive stepsize selection strategy resulting in an approximate solution whose associated defect (residual) satisfies certain properties that allow us to monitor the global error reliably and efficiently. We prove the classic and optimal convergence of the numerical approximation to the exact solution. In addition, a companion system of equations is introduced in order to estimate the mathematical conditioning of the problem. A side effect of introducing this companion system is that it provides an effective estimate of the global error of the approximate solution, at a modest increase in cost. We have implemented our approach as an experimental Fortran 90 code capable of handling various kinds of DVIDEs with non-vanishing, vanishing, and infinite delay arguments.
Lake Benthic Algal Production and Extracellular Material
Keywords: benthic algae
extracellular material
environment
cross ecosystem comparison

Littoral zone primary production is under-studied relative to the pelagic zone, despite recent work indicating its importance to the lake as a whole. Benthic extracellular material, shown to be important for food web dynamics and stabilization of the surrounding ecosystem in the marine intertidal, is even less frequently studied in lakes. I examined the environmental and community level drivers of benthic primary production, and found production to increase over the summer and to decrease with disturbance. I also found that maximum photosynthesis and efficiency under sub-saturating light both increased with depth, contrary to the existing, laboratory-derived paradigm of a trade-off between the two. I also examined how benthic primary production and environmental factors were correlated with the amount of extracellular material. I found that loosely bound colloidal extracellular material decreased with in situ photosynthesis and was affected by algal community composition, whereas tightly bound capsular extracellular material was affected only by date, indicating that capsular material is refractory in lakes just as it is in marine systems. Contrary to what is seen in marine systems, however, there were no direct effects of the environmental factors, possibly the result of physical differences between these systems. I also performed the first cross-ecosystem comparison of extracellular material. Despite relatively few studies from lakes and streams, and methods which have not been standardized, I found that lakes were similar to marine intertidal zones both in their median amounts of extracellular material and their relationships between extracellular material and chlorophyll a. This relationship appeared to be quite different in streams, with very low amounts of extracellular material found at sites with either high or low chlorophyll a concentrations. While the above studies will improve future estimates of lake carbon budgets and whole-lake production, my development of a permutation test for path analysis, and a novel application of the Bayesian principal components analysis, will assist all ecological studies that are often restricted in their sample sizes or compromised by missing data.
Knowledge, Organization and the Division Of Labour: Evaluating the Knowledge Class in Canada
Keywords: class
occupation
postindustrial
labour process
skill
organization
Marx
Weber
closure
knowledge

This dissertation explores the claim that, in advanced capitalist countries like Canada, a powerful knowledge class is assuming increasing dominance within the social relations of production. Attached to such theories are claims of trends toward post-bureaucratic organizations, rising job complexity and autonomy, and increased power within operational and strategic decision-making processes. In my study I focus on Canadian “specialist” employees (professionals and semi-professionals) and managers. I present aggregated and disaggregated data from two Canadian surveys conducted in 1983 and 2004 and complement this with original interviews with information technology (IT) workers and engineers. I find a seeming paradox within the labour process of specialists and managers, with task-level autonomy declining even as job complexity and involvement in organizational decisions are rising. I provide evidence that imperatives for profit/cost effectiveness are leading to efforts to make specialist and managerial labour and knowledge more transparent, integrated, and manageable, but this is not the same as degradation or proletarianization. In contrast to my expectation, I find boundaries in the division of labour are durable despite this “socialization” of many labour processes. I argue that a specialist-and-managerial class (SMC) exists in Canada, and will continue to exist, though it is subordinate to and exploited by the capitalist elite even as it excludes and exploits the working class through occupational closure and credential barriers. The SMC is thus contradictory, internally heterogeneous and fraying at its borders, but simultaneously resilient. The resiliency comes via possession of specific strategic knowledge and consequent ability to secure rents and/or control specific organization assets via delegated authority. Resiliency is also structural, with management in many organizations retaining an interest in separating planning and design (“conception”), on the one hand, from process and completion (“execution”), on the other, in order to maximize efficiency and productivity through more centralized control.