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In the context of Real-Time Bidding (RTB) the machine learning problems of

imbalanced classes and model selection are investigated. Synthetic Minority Oversampling Technique (SMOTE) is commonly used to combat imbalanced classes but a shortcoming is identified. Use of a distance threshold is identified as a solution and testing in a live RTB environment shows significant improvement. For model selection, the statistical measure Critical Success Index (CSI) is modified to add emphasis on recall. This new measure (CSI-R) is empirically compared with other measures such as accuracy, lift, efficiency, true skill score, Heidke's skill score and Gilbert's skill score. In all cases CSI-R is shown to provide better application to the RTB industry.

Author Keywords: imbalanced classes, machine learning, online advertising, performance measures, real-time bidding, SMOTE

This thesis investigates the organization and development of water management systems in a sample of past tropical societies in Southeast Asia and Mesoamerica. A comparative approach is employed to show how water management affected the trajectories of the ancient states of Angkor, Cambodia, Bagan, Myanmar, Sukhothai, Thailand, Central and East Java, and Caracol, Belize. Differing types of water management is demonstrated through the use of the adaptive cycle, a conceptual framework through which a broad range of socio-ecological data can be examined in order to explore shifting levels of resilience over time. To understand why levels of resilience might change over time, entanglement theory, which looks at the relationships between humans and things, is utilized to determine how entangled these societies were with water management. Particular degrees of entanglement and shifting levels of resilience provide the analysis with the means to explore how water management changed over time as these societies rose, grew, and finally collapsed.

Author Keywords: Ancient Tropical Societies, Entanglement, Resilience, Socio-Ecological Dynamics, Southeast Asia, Water Management

This thesis sought to explore and evaluate perceptions of food needs and the role of a community freezer in addressing those needs, among Inuit in Hopedale, Nunatsiavut (Northern Labrador). Research was carried out through an exploratory sequential mixed-methods design. Phase 1 employed qualitative interviews with community members in Hopedale to explore the perceptions of food needs from an Inuit perspective. Results from Phase 1 identified a series personal, physical, cultural, and social food needs that informed the development of a series of questions that were integrated into a community-wide survey that was implemented in Phase 2. Results from Phase 2 identified a series of cultural, household and individual characteristics that significantly impact perceived ability to meet needs among community members in Hopedale. Findings from this research contribute to our understanding of food needs, and may potentially influence estimates of levels of needs that are protected in Inuit land claims, and inform the development or improvement of community methods for food support.

Author Keywords: Food Needs, Food Programs, Food Security, Indigenous, Inuit, Mixed-Methods

This paper investigates the effect of listing a stock on the S&P 500 Index on the stock's volatility, using various econometrics models: GARCH and EGARCH. The study mainly addresses three issues; firstly, it analyzes stock volatility in two sub-periods, secondly, it determines whether the announcement can account for the fluctuations in the price of the stock, and finally, it investigates the change in the stock's variance. After isolating the effects of external and industry shock by using the returns on the S&P 500 Index as a proxy, the author finds evidence of structural change in the volatility of stocks after that stock is added to the index. Additionally, the existence of a dominant symmetric effect, which captures the response of volatility to news, indicate that following the onset of including the stock on the index, information flowing into the market increased. However, the rate at which old news is captured in price falls. The empirical evidence also suggests that on average a stocks variance falls and that the announcement to list a stock on the index has little effect on the stock's price.

Author Keywords: EGARCH, GARCH, S&P 500 Index, Symmetric Effect, Volatility

ABSTRACT

Women as Gifts and the Triple Hecate Myth in Shakespeare's

Troilus and Cressida, Antony and Cleopatra, and Cymbeline

Women are placed into sexual roles by the patriarchal system in which we live. Gayle Rubin terms this a "sex/gender system" and explains that within this system women are exchanged as "gifts" between men to form kinship ties. The sexual roles this system creates are embodied in the "Triple Hecate myth." Hecate was the goddess of witchcraft in Ancient Greece and was known to have three faces: Maiden, Nymph and Crone. The Maiden is in girlhood and the label is applied to any woman before she becomes sexually active. The Nymph is a sexually active woman who lives within the norms of society. A sexually active woman who lives outside those norms is a Whore. A Crone is a woman who has passed menopause. She is seen as either a wise elder or a wicked stepmother figure.

In Shakespeare's plays Troilus and Cressida, Antony and Cleopatra, and Cymbeline, the female protagonists Cleopatra, Imogen and Cressida are all trying to control their own destinies and rise above or manipulate this patriarchal system of control. These three women are travelling through the "Triple Hecate Myth." Cleopatra begins a Whore and ends a Nymph, Imogen begins a Maiden and ends a Nymph, and Cressida begins a Maiden and ends a Whore. They each also problematize the "gift" exchange system either by attempting to self-exchange (Cleopatra and Imogen) or by being exchanged multiple times (Cressida).

Keywords: William Shakespeare, Triple Hecate Myth, Gift Exchange, Gayle Rubin, Cymbeline, Troilus and Cressida, Antony and Cleopatra, Feminist Criticism, Classical Studies

Author Keywords: Antony and Cleopatra, Cymbeline, Gayle Rubin, Shakespeare, Triple Hecate, Troilus and Cressida

Structure-property relationships are increasingly valued for the identification of specifically engineered materials with properties optimized for targeted application(s). In this work, linear and branched diesters for use in lubricant formulations are prepared from lipid-based oleochemicals and their structure-property relationships reported. It is shown that the branched diesters possess exceptional physical property profiles, including suppression of crystallization, and are superior alternatives for use in lubricant formulations. For the linear aliphatic diesters, both high and low temperature properties were predictable functions of total chain length, and both were differently influenced by the fatty acid versus diol chain length. Symmetry did not influence either, although thermal stability decreased and thermal transition temperatures increased with increasing saturation. All of the linear diesters demonstrated Newtonian flow behaviour. Viscosity was also predictable as a function of total chain length; any microstructural features due to structural effects were superseded by mass effects.

Author Keywords: Crystallization, Phase behaviour, Rheology, Structure-Function, Thermogravimetric analysis, Vegetable Oils

The thesis uses three case studies of President Nixon's foreign policy in South-east Asia to analyze presidential domestic-making. The theoretical concept of personality politics is used to analyze the Nixon administration and foreign policy. Nixon's secretive nature combined with his mistrust of the press and bureaucracy to create an office structure that restricted the involvement and notification of others of his foreign policy. This thesis also takes into account the domestic climate that Nixon was operating within, including significant antiwar opposition, an adversarial media, and an ideologically opposed bureaucracy. Nixon's foreign policy was ultimately the result of a perfect storm of factors. The president's natural penchant for secrecy, along with his mistrust of the press and bureaucracy, combined with the American political environment that was in many instances ideologically set against him, also helped shape his foreign policy.

Author Keywords: American Presidency, China, National Security Council, Richard Nixon, US Foreign Policy, 1969-1973, Vietnam War

ABSTRACT

The Art of the Sustainable Street

Miriam L. R. Mutton

The street influences our sense of community every day. It is argued that getting the street right communicates a collective vision for action leading to sustainable community.

This investigation continues conversations for community repair and resilient change, especially for small town Ontario. The researcher is informed by ways of seeing inspired by Walter Benjamin's literary montage, The Arcades Project. By method of collecting and connecting information from literature sources spanning several decades and recent interviews, this thesis demonstrates in narrative form the value to community of everyday street details of human scale. Recurrent themes are adopted as technique in validation. Findings are presented from various perspectives including those of the design professional and the politician.

The sustainable street enables communication. Research outcomes indicate knowledge transferred through the art of storytelling supports place-making and connection to community. Fragments of information connect into themes defining safe streets which foster trust among strangers, and facilitate citizenship and good governance.

Key words: sustainable community, citizenship, safe streets, Benjamin, governance

Author Keywords: Benjamin, citizenship, governance, safe streets, sustainable community

From ca. 800-1400 CE, low-density agrarian states dominated Southeast Asia,

their authority emanating from their epicentres at places such as Angkor in Cambodia,

Bagan in Myanmar, and Sukhothai in Thailand. These epicentres were the setting for

numerous structures, activities, and stakeholders that became integral for the perpetuation

of the state. These states and their epicentres declined and collapsed around the same

time. As part of a larger project (the Socio-ecological Entanglement in Tropical Societies

(SETS Project), the aim of this thesis is to add to our understanding of entanglement,

resilience, and collapse in Southeast Asia. Using a relatively new method that combines

resilience and entanglement theories, this thesis presents a view of epicentral

entanglements and vulnerabilities that eventually contributed to the collapse of these

societies. The results indicate that overextended socio-ecological systems and their

growing entanglements created a loss of resilience and, when faced with change in these

systems, collapse.

Author Keywords: Angkor, Bagan, Entanglement Theory, Resilience Theory, Southeast Asia, Sukhothai

This thesis explores the use of 1-butene cross metathesized palm oil (PMTAG) as a feedstock for preparation of polyols which can be used to prepare rigid and flexible polyurethane foams. PMTAG is advantageous over its precursor feedstock, palm oil, for synthesizing polyols, especially for the preparation of rigid foams, because of the reduction of dangling chain effects associated with the omega unsaturated fatty acids. 1-butene cross metathesis results in shortening of the unsaturated fatty acid moieties, with approximately half of the unsaturated fatty acids assuming terminal double bonds. It was shown that the associated terminal OH groups introduced through epoxidation and hydroxylation result in rigid foams with a compressive strength approximately 2.5 times higher than that of rigid foams from palm and soybean oil polyols. Up to 1.5 times improvement in the compressive strength value of the rigid foams from the PMTAG polyol was further obtained following dry and/or solvent assisted fractionation of PMTAG in order to reduce the dangling chain effects associated with the saturated components of the PMTAG. Flexible foams with excellent recovery was achieved from the polyols of PMTAG and the high olein fraction of PMTAG indicating that these bio-derived polyurethane foams may be suitable for flexible foam applications. PMTAG polyols with controlled OH values prepared via an optimized green solvent free synthetic strategy provided flexible foams with lower compressive strength and higher recovery; i.e., better flexible foam potential compared to the PMTAG derived foams with non-controlled OH values. Overall, this study has revealed that the dangling chain issues of vegetable oils can be addressed in part using appropriate chemical and physical modification techniques such as cross metathesis and fractionation, respectively. In fact, the rigidity and the compressive strength of the polyurethane foams were in very close agreement with the percentage of terminal hydroxyl and OH value of the polyol. The results obtained from the study can be used to convert PMTAG like materials into industrially valuable materials.

Author Keywords: Compressive Strength, Cross Metathesis, Fractionation, Polyols, Polyurethane Foams, Vegetable Oils