Via Sapientiae: The Institutional Repository at DePaul University
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Evaluating wrist placement and signal processing techniques for real-world HRV monitoring using PPG
Full text linkThis thesis investigates trade-offs between signal quality and data coverage in photoplethysmographic (PPG) heart rate variability (HRV) monitoring using wrist-worn devices. The goal was to evaluate whether wrist placement and signal processing techniques can improve measurement reliability in real-world conditions. Data was collected from healthy participants wearing smartwatches on both wrists during rest and a structured math task introducing natural wrist movement. Three distinct processing methodologies were compared, including a proposed Rolling-Standardized Derivative (RSD) approach. Results showed that while HRV signals from both wrists were highly correlated at rest, motion caused a measurable drop in signal quality and inter-wrist agreement, especially on the dominant side. However, the RSD method significantly outperformed traditional algorithms in preserving usable data and maintaining correlation under motion. These findings suggest that improved signal processing can help offset motion artifacts and support more flexible sensor placement, enabling more ecologically valid HRV monitoring in real-world use cases
From Bystanders to Upstanders: A Multi-level Strategy to Combat Human Trafficking in Hospitality
Full text linkHuman trafficking, a prevalent hidden crime, continues to be a pressing concern in the hospitality industry. However, the effectiveness of existing anti-human trafficking programs in improving employee response behaviors remains unknown. This report evaluates the effectiveness of training messages to capture hospitality employees’ attention, facilitating empathy and willingness to help the victims. It further explores the facilitators and barriers influencing employees’ responses to human trafficking after training. The findings from this report provide a practical guide for hospitality practitioners to develop and refine ongoing training programs, strengthening employees’ commitment to combating human trafficking. Beyond general training, this report offers a comprehensive framework for pre-, during-, and post-incident protocols through a multi-level approach that integrates individual, company, and societal and legal perspectives for anti-human trafficking interventions. This report offers a foundational roadmap for hospitality practitioners to drive meaningful change in the global fight against human trafficking
They’re Right Behind Me, Aren’t They? Inconsistent Judicial Approaches to Third-Party Cookies Tracking
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Navigating Knowledge: An Autoethnographic Journey Through Instructional Decision-Making and Educational Technology Development
No full textHave you ever felt lost while learning? Guided by this curiosity, the researcher embarked on a decade-long journey to understand how students navigate learning environments and how educational technology might offer clearer pathways. In response, the researcher designed and developed Navigating Knowledge, a learning platform informed by his dual roles as a higher education instructor and educational technology developer. This capstone is distinct in its simultaneous integration of theory, design, and implementation to bridge pedagogical insight with technological innovation. Using an analytic autoethnographic methodology, this qualitative research critically examined 33 instructional, platform development, and reflective journal artifacts from 2013 to 2024. Grounded in constructivist learning theory, instructional decision-making behaviors informed by Path-Goal Theory (directive, supportive, achievement-oriented, and participative), and the evolving landscape of educational technology, the study explored how the researcher\u27s lived experience shaped instructional practice and platform design. The findings revealed a shift from structured, instructor-led environments to adaptive, participatory, and student-centered learning experiences. Tools such as Navigating Knowledge\u27s NK Tree map, interactive learning cards, and AI-supported chatbot, Jo NK, demonstrated how constructivist pedagogy could be operationalized in scalable digital tools. These features were not developed in abstraction but were iteratively refined based on real classroom experiences. This capstone contributes to the field of education by offering a model for interdisciplinary, practitioner-led technology development. It challenges organizations to design learning technologies with instructors, not just for them. Furthermore, it advocates for more integrative approaches to instructional design wherein educational theory and technology inform one another in service of transformative, lifelong learning
Leadership Attributes to Guide the Adoption and Curricular Design Process of Environmental Sustainability Education for EC-12 Public School Districts
No full textThough awareness of environmental issues increases, limited resources are available as guidance for public school leadership to introduce and implement Environmental Sustainability Education (ESE) into their curriculum. Increasing evidence exists supporting the why ESE should be part of the curriculum, however few resources are available on the how to successfully implement it. This study seeks to provide insight to public school leaders regarding attributes beneficial to gain support of their communities and points to consider for crafting culturally relevant ESE curriculum. Public schools serve over 90% of American students, if this environmental crisis is to be solved, ESE must be available to as many students as possible. Through the voice of practitioners this study sought to identify leadership attributes applied to gain support of ESE curriculum and those that guided the creation of ESE to be offered to their students that provided hope, stewardship, and global citizenship
