QSpace

Queen's Scholarship & Digital Collections

QSpace is an open access repository for scholarship and research produced at Queen's University. QSpace offers faculty, students, staff, and researchers a free and secure home to preserve and present their scholarship.

Communities in DSpace

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Digital Collections 5940
This community includes digital collections produced by members of the Queen’s community, as well as digital special collections made available via W.D. Jordan Rare Books & Special Collections.
Exams & Syllabi 0
This community provides access for staff and students at Queen’s University to degree examination papers and syllabi. To access Exams & Syllabi off campus please login using your Queen's NetID and password.
Graduate Theses, Dissertations and Projects 10214
This community includes graduate theses, dissertations and projects produced by students at Queen’s University.
McGill-Queen's University Press 10
Scholarly Contributions 14546
This community includes Queen’s peer-reviewed research publications, including journal articles, book chapters, conference proceedings, and more.

Recent Submissions

Access status: Open Access ,
Play Naked: Puta Economies Against Olympic Dispossession
(McGill-Queen's University Press, 2026-07) de Lisio, Amanda
At Rio de Janeiro’s 2014 World Cup and 2016 Olympic Games, where athletes were celebrated as symbols of national achievement, sex workers – reclaiming the term puta – mobilized their own bodily labour within neoliberal regimes of visibility and control, leaving behind embodied and unexpected legacies of resistance. Play Naked reclaims sex work as a site of puta economic agency and political resistance, where femme and trans bodies can assert value and visibility within state systems designed to exploit or erase them. Moving beyond spectacle and protest, Amanda De Lisio draws on extensive interviews with sex workers in Rio de Janeiro, whose stories are often ignored, infantilized, or co-opted to foment moral panic about human trafficking at major sporting events. Their narratives reveal the persistence of state violence and the complex strategies of defiance used by workers to navigate – and sometimes turn to their advantage – the rapid urban transformations driven by mega-events. Rejecting familiar narratives of displacement, De Lisio illuminates everyday acts of endurance and defiance where land reform, urban renewal, and capitalist expansion collide with gendered and racialized bodies.
Access status: Open Access ,
Experiments in Decentralized Multivehicle Localization Using Ultra-Wideband Transceivers
(IEEE, 2024-08-06) Taylor, Emily; Sears, Thomas M C; Marshall, Joshua A
This paper presents an experimental study of a decentralized solution for collaborative multivehicle localization in GNSS-denied environments using an unscented Kalman filter (UKF). By placing two ultra-wideband (UWB) transceivers on each uncrewed ground vehicle and having vehicles communicate only odometry information, robots are able to act as mobile landmarks for each other. World-frame and relative-frame formulations are presented. Both versions were tested using DWM1001C UWB transceivers and three Clearpath Husky robots. The world-frame filter was found to outperform dead reckoning in most instances, however in some cases poor odometry in one robot resulted in reduced performance for other robots in the system. Results for the relative formulation demonstrated an average improvement of 71.8\% in RMSE over dead reckoning.
Access status: Open Access ,
The dysregulated IL-23/TH17 axis in endometriosis pathophysiology
(The American Association of Immunologists; Oxford University Press, 2024-03-11) Sisnett, Danielle J.; Zutautas, Katherine B.; Miller, Jessica E.; Lingegowda, Harshavardhan; Ahn, Soo Hyun; McCallion, Alison; Bougie, Olga; Lessey, Bruce A.; Tayade, Chandrakant
Endometriosis is a chronic inflammatory disease in which endometrial-like tissue grows ectopically, resulting in pelvic pain and infertility. IL-23 is a key contributor in the development and differentiation of TH17 cells, driving TH17 cells toward a pathogenic profile. In a variety of inflammatory and autoimmune disorders, TH17 cells secrete proinflammatory cytokines, including IL-17, contributing to disease pathophysiology. Our studies and others have implicated IL-17 and TH17 cell dysregulation in endometriosis, which is associated with disease severity. In this article, we address whether IL-23-driven TH17 cells contribute to cardinal features of lesion proliferation, vascularization, and inflammation in endometriosis using patient samples, representative cell lines, and our established mouse model of endometriosis. The results indicated dysregulated expression of key genes in the IL-23/TH17 axis in patient ectopic and eutopic endometrial samples and increased IL-23 protein in patient plasma compared with controls. In vitro studies using primary human TH cells determined that rIL-23 mixture treatment increased pathogenic TH17 cell frequency. Similarly, rIL-23 treatment of cell lines (12Z cells, EECCs, HUVECs, and hESCs) representative of the endometriotic lesion microenvironment increased cytokines and growth factors, which play a role in lesion establishment and maintenance. In a syngeneic mouse model of endometriosis, rIL-23 treatment altered numbers of myeloid and T cell subsets in peritoneal fluid and increased giant cells within the lesion. Lesions from rIL-23-treated mice did not reveal significant alterations in proliferation/vascularization, although trends of increased proliferation and vascularization were observed. Collectively, these findings provide insights into the impact of the IL-23/TH17 axis on local immune dysfunction and broadly on endometriosis pathophysiology.
Access status: Open Access ,
Evaluating Graph Generation Models for Computer Network Topology Synthesis: A Comparative Study of Classic and Deep Learning Approaches
(2026) Jin, Qiru
Operational confidentiality and security restrictions often obscure real-world wide-area network (WAN) topologies, forcing researchers to rely on synthetic graphs for networking experimentation. However, generic graph benchmarks frequently fail to capture the specific structural characteristics of engineered communication networks. This study systematically evaluates six representative graph generators, bridging classic statistical models (Barab\'asi-Albert(BA), Stochastic Block Models(SBM), Block Two-Level Erd˝os-R´enyi(BTER)) and deep generative paradigms (GraphVAE, GraphRNN, NetGAN), against 193 real-world topologies from the Internet Topology Zoo (ITZ). We introduce a dual-track benchmarking framework that decouples instance-level replication from cross-scale generalization, evaluating models through complementary node-level distributions and graph-level structural metrics. Our results demonstrate that no single model consistently dominates all structural dimensions. NetGAN achieves superior instance-level structural precision, whereas classic models like BTER and SBM provide higher cross-scale stability and path-length fidelity for large-scale synthesis. Crucially, we identify global accessibility which is measured by closeness centrality, as a persistent challenge for all generative paradigms under the inherent sparsity of WANs. Integrating these findings, we formalize an evidence-driven decision logic that maps high-level networking tasks (routing simulation, resilience analysis, and protocol testing) to the most structurally aligned generative models. This work provides a domain-aware foundation for constructing synthetic WAN environments that remain faithful to the operational requirements of modern communication research.
Access status: Open Access ,
The effect of carbon dioxide on the flotation of pyrrhotite and pentlandite at eagle mine
(2026-05-14) Kolter Weaver; Mining Engineering; Gibson, Charlotte
Eagle Mine is a nickel-copper mining and milling operation located in Champion, Michigan. The mine is evaluating options to improve project economics through increasing nickel recovery and/or producing a desulfurized tailing through pyrrhotite flotation, which could be used as mine backfill. As part of this evaluation, the objective of this study was to increase pentlandite and pyrrhotite recovery during flotation, using CO2 and other reagents as flotation activators. Flotation testing was conducted on two process streams from Eagle Mine: (1) Bulk Rougher Tailings (BRT), and (2) Bulk Rougher Feed (BRF). Testing showed that CO2 and copper sulfate additions were effective when floating BRT, where up to 90% pyrrhotite and 36% nickel recoveries were achieved. In the flotation of the BRF, CO2 addition resulted in a 2.7% increase in nickel recovery compared with baseline plant conditions, driven by a large increase in pyrrhotite recovery. In addition, CO2 was tested on two different BRF ore types (SMSU and KEEL) in conjunction with different types of grinding media (mild steel (MS) and high chrome (HiCr)). Grinding SMSU ore with MS media while adding CO2 during flotation resulted in a 6.4% increase in nickel recovery. When grinding SMSU with HiCr media and while adding CO2 during flotation, the nickel recovery increased by 4.7%. For the flotation of the KEEL ore using CO2, there was a 9.6% increase in nickel recovery after grinding with MS and a 6.6% increase in nickel recovery after grinding with HiCr. It was postulated that the CO2 addition altered the zeta potential of pyrrhotite, leading to higher recovery. Subsequent galvanic interaction testing showed mild steel-pyrrhotite had larger galvanic interactions relative to high chrome-pyrrhotite at pH 6 (in the presence of CO2), while high chrome-pyrrhotite had stronger galvanic interactions at pH 9 (no CO2). These results suggest that at low pH in the presence of CO2, iron hydroxide formation (oxidation) was limited due to iron carbonate formation and elemental sulfur remained, promoting xanthate attachment and improving flotation kinetics. The findings of this thesis demonstrate the benefits of carbon dioxide in the processing of Eagle Mine ores, improving nickel recovery and assisting with the desulfurization of tailings.