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Do Habitat Suitability Models Reflect Actual Movement? Insights from Wild Turkey Dispersal in Maine
Get PDFHabitat suitability models (HSMs) are widely used to infer landscape connectivity and animal movement paths, but their reliability for predicting movement remains unclear. This study evaluated HSM predictions for wild turkey (Meleagris gallopavo) fall dispersal using MaxEnt models based on citizen science presence data and GPS-tracked movements in Maine, USA. Two models, one using all-season data and another fall-specific, were compared to assess predictive accuracy. While turkeys generally moved through higher-suitability areas, suitability estimates at movement points overlapped extensively with random points. The fall-specific model showed only marginal improvement over the all-season model. Results indicate that HSMs built on presence data alone may inadequately predict movement paths. Connectivity models relying on such HSMs risk substantial uncertainty, underscoring the need to validate connectivity predictions with independent movement data to ensure effective conservation planning
An Injection Locked Oscillator in 0.1um GaAs pHEMT for Local Oscillator-Based Phase Shifting Phased Arrays
Get PDFThis thesis presents the design of a low-power Injection-Locked Oscillator (ILO) in a 0.1μm GaAs pHEMT technology, operating at 11.7GHz for Ku-band Low-Earth Orbit (LEO) satellite communication. Two versions were implemented, targeting different applications. The first version was a low-output power version targeting systems with active mixers. The second version is a high-output power version that consumes more power but is capable of driving passive mixers. Although a tapeout was not possible, the chip was simulated extensively across various process and temperature conditions. The low-power variant has an output power of 1.7dBm with a total DC power consumption of 13.3mW. The high-power variant achieves an output power of 7.7dBm with a total DC power consumption of 22.7mW. The ILO achieved a free-running phase noise of -103dBc/Hz at a 1MHz offset, and an injection lock range of +/-500MHz with an injection signal of -4dBm
Automation & Customization: Rethinking Precast Design with Robotics and Modular Systems
No full textThis thesis reimagines precast concrete foundation manufacturing through modular design, robotic automation, and DFMA (Design for Manufacturing and Assembly). It introduces a kit-of-parts for customizable foundation panels and a catalogue of modular, reusable formwork components—both developed through a DFMA process—to reduce material waste, labor, and production time. A closed-loop feedback system between design and fabrication ensures precision and adaptability. The robotically assembled formwork accommodates both standard and complex geometries, streamlining the digital workflow and architectural flexibility. Situated in the Canadian context, this research proposes a scalable, off-site fabrication strategy addressing labor shortages and housing demand. Panels use bolted double butterfly joints for rapid installation, adaptability, and disassembly—eliminating on-site pouring and single-use hardware. Validated through iterative prototyping and a 1:10 scale foundation, this work advances precast techniques into prefabricated on-site assembly. It frames automation as a tool for ecological efficiency, elevated craft, and mass customization in industrialized construction
Inclusive Leadership: Supporting Employees with Disabilities
Get PDFThis study addressed the gap in literature regarding the impact of inclusive leadership on employees with disabilities, focusing on workplace loneliness, disability disclosure, and psychological empowerment, while considering the moderating role of self-compassion. The study involved 205 participants who self-reported having a disability and responded to quantitative questionnaires as well as open-ended questions. The results revealed that inclusive leadership was associated with lower workplace loneliness and higher psychological empowerment. However, contrary to expectations, inclusive leadership did not influence disability disclosure, and self-compassion did not moderate these relationships. Analysis of open-ended responses identified leadership behaviors that fostered a sense of belonging and appreciation for employees' uniqueness. These findings underscore the importance of inclusive leadership in shaping the work experiences of employees with disabilities, particularly regarding loneliness and psychological empowerment. The study also provides valuable insights for future research and organizational practices aimed at enhancing inclusion for employees with disabilities
Three Essays on Mergers and Acquisitions: Merger Termination Risk and Takeover Rumors
Get PDFIn today’s competitive business environment, mergers and acquisitions (M&A) are key strategies for firms to expand margins, enhance market positions, and create value. Understanding the motives, challenges, and outcomes of M&A is crucial for navigating the complexities of the current business landscape. While M&A transactions have been widely studied, gaps remain, particularly in merger termination risks and market rumors. Many M&A transactions fail, while others are mere market rumors before materializing into actual deals. These uncertainties pose financial and strategic risks, influencing firm valuations, investor behavior, and market dynamics. This dissertation explores two underexamined areas in M&A: terminated mergers and rumored takeovers. The first essay investigates the risk of unsuccessful bidders becoming takeover targets after a failed merger attempt, which we refer to as merger termination risk. The market can predict which unsuccessful bidders are likely to be acquired as early as the termination of their deals, particularly if they are profitable, liquid, have smaller boards, or if the target initiates the termination. The second essay finds that the market can efficiently process rumored takeovers, anticipating both the timing of rumor materialization and the likelihood of deal success. Additionally, the presence of rumored competing bidders and post-bid competition significantly increases the likelihood of deal completion. The third essay finds the role of deal synergies and low information asymmetry in rumored takeovers as key drivers of positive post-merger performance. CEO duality and compensation, which serve as proxies for managerial hubris, show mixed results in the post-merger performance. CEO duality positively impacts the post-merger performance, while higher CEO compensation is associated with negative post-merger outcomes. This underscores the complexity of managerial characteristics in determining rumored M&A outcomes