17504 research outputs found
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Investigating Precipitation Samples to Determine Abundance of Pesticides via Atmospheric Transport
No full textEchoes of Exploitation: A Historical and Ecological Study of Land Use, Logging, and Environmental Change in Northeastern Ohio Since European Colonization.
No full textThis study examines the environmental transformation of Northeastern Ohio since European colonization, focusing on the interplay of human activity with ecological change; land use practices include logging, farming, and other forms of environmental exploitation. Combining research previously conducted by others, chemical analysis of lake core sediments, radiometric dating using Pb-210, and direct measurement of the distribution of grain sizes. Over the past 200 years, logging, agriculture, and other environmental disturbances have led to increased sediment deposition, nutrient fluxes, and ecosystem shifts.
Elemental analysis at the OSU Star Lab complements Pario sediment testing to identify grain size and nutrient fluxes through time. Preliminary results document major changes in sediment sources, including increased sediment deposition into the lake attributed to agricultural and logging activities, which have disrupted natural nutrient cycles and transformed wetland ecosystems. Particle size analysis revealed a dominance of clay-sized sediments rather than the expected silt-dominated loess, suggesting a complex interplay of hydrological and anthropogenic factors. By integrating sediment core analysis, radiometric dating, and elemental testing, this research highlights the long-lasting effect of human activity on Ohio’s landscapes. This research underscores how human influence leaves a legacy on the landscape, showing a critical need for sustainable land use practices. In this respect, historical and ecological data are integrated into the study as valuable insights into the complex relationship between human activity and environmental systems within Northeastern Ohio
Modeling the Impact of Cellular Senescence on Wound Healing in Lung Alveolar Epithelial Tissue
No full textAging is a leading cause of serious diseases, such as IPF, cardiovascular, and neurodegenerative diseases. Aging involves twelve key factors, most of which are interconnected and can drive one another. Cellular senescence is one of twelve hallmarks of aging. Prolonged cellular senescence can lead to chronic inflammation, tumor development, immune deficit, and stem cell exhaustion, ultimately resulting in tissue dysfunction. However, the dynamics of senescent cell occurrence and removal within a population remain poorly understood. This study models wound healing in lung alveolar tissue, with a focus on the role of cellular senescence dynamics. Wound healing model was expected to reproduce tissue deterioration over time with increasing cellular senescence. Using the Python programming language and its scientific libraries, individual cells, their cell types, and the logic behind cell fate decisions are simulated on a two-dimensional grid. The simulation of wound healing process generated data on division and migration counts, wound area, wound closure step, and average permeability. Four wound healing models were developed, each with distinct features: proliferation-based wound healing model, an EMT-incorporated model, density-directed migration model, and a model integrating senescent cell dynamics. In the absence of molecular dynamics, cell population behavior alone demonstrated a collective migration of cells, delay in wound closure and rise in permeability due to cellular senescence. The fourth model integrating senescent cell dynamics demonstrated tissue deterioration during wound healing as age parameter which determines senescence probability increases, revealing age-related thresholds beyond which tissue fails to regenerate. There are several limitations in this study such as unknown initial tissue composition, unclear parameters in the system, and lack of molecular mechanisms. Future integration of genetic circuits and experimental validation will enhance model accuracy and clinical relevance. Ultimately, this work suggests that personalized simulations can support diagnosis of certain disease and intervention for age-related lung diseases like IPF
First Nations, First Knowledge: Indigenous Sovereignty and Environmental Governance in Australia, Brazil, and Aotearoa New Zealand
No full textThis research examines how Indigenous participation in early state-building processes shapes contemporary integration of Traditional Ecological Knowledge (TEK) in environmental governance. Through comparative analysis of Australia, Aotearoa New Zealand, and Brazil, the study reveals how initial recognition of Indigenous sovereignty creates enduring institutional frameworks that either enable or constrain TEK integration. In Australia, the terra nullius doctrine established persistent barriers to Aboriginal cultural burning practices. Brazil\u27s delayed constitutional recognition resulted in inconsistent implementation despite formal protections. Aotearoa\u27s Treaty of Waitangi, while imperfectly implemented, provided foundations for substantive co-management arrangements reflected in innovative approaches like granting legal personhood to natural features. Drawing on Indigenous scholarship that conceptualizes sovereignty as emerging from relationships with land rather than territorial control, the research challenges state-centric sovereignty theories by demonstrating how Indigenous environmental authority persists despite colonial dispossession. The findings suggest that effective environmental governance requires reconsidering fundamental sovereignty concepts by recognizing Indigenous peoples not merely as stakeholders with useful knowledge but as sovereign nations with inherent authority derived from ancient relationships with lands and waters. This reframing has significant implications for addressing contemporary environmental challenges, indicating that successful climate responses depend not just on adopting Indigenous techniques but fundamentally reconsidering how we understand authority, responsibility, and relationship with the natural world
From Chaos to Chic: The Design and Development of a Digital Wardrobe Management Application
No full textThis paper explores the development of My Digital Wardrobe a cross-platform application designed to address the challenges of managing a growing wardrobe, including disorganization, underutilized clothing, and inefficient outfit planning. The app enables users to upload, categorize, and mix-and-match clothing items, providing a streamlined approach to wardrobe management. By integrating cloud storage, it ensures accessibility across multiple devices, while React Native provides a minimalist and responsive user interface.
The design of the app emphasizes minimalism and responsiveness, ensuring ease of use while maintaining cross-platform compatibility. The current implementation allows users to manually categorize clothing into fundamental groups such as tops and bottoms. However, expanding these categories to include items like jackets and accessories would further enhance its functionality. User testing was conducted using Expo, with three tops and three bottoms selected from Pinterest to simulate real wardrobe items. The results confirmed that the app’s core features perform as intended, though additional personalization options could further improve the overall user experience
Effectiveness of Common Wastewater Techniques in Removing Warfarin and Brodifacoum Rodenticides
No full textThe Impact of Attachment Style on the Perception of Micro-Expressions
No full textMicro-expressions are brief, unconscious facial expressions that follow an emotional stimulus, expressed through subtle muscle movements in the face. The present study posited that individuals with certain attachment styles, from the secure, anxious, and avoidant styles, would perform better at identifying micro-expressions from a video than others; namely, that the anxiously attached participants would perform best. The results displayed low competence across the board at identifying micro-expressions- no participant was able to attain an accuracy score on identifying micro-expressions above 50%. However, there were interesting patterns in how individuals answered, marking clear trends in identification
Violent Legacies: Transitional Justice and Postwar Violence in Guatemala
No full textThis thesis investigates the varying impacts of transitional justice mechanisms on levels of lethal criminal violence following the Guatemalan Civil War. Although many scholars have researched the Guatemalan Civil War and its impacts on communities throughout Guatemala, the relationship between wartime political violence, transitional justice, and postwar violence remains largely understudied. The violent legacy of the Guatemalan Civil War and the efficacy of transitional justice processes in moderating postwar violence have critical implications for understanding how different justice mechanisms have influenced and can continue to impact levels of violence in postwar societies. This study employs an interdisciplinary approach to process-tracing analysis, drawing from literature from both political scientists and historians, as well as primary source accounts from Guatemalan civilians who witnessed violence during the civil war. This thesis makes several important arguments: that robust truth and reconciliation commissions can decrease criminal violence by demonstrating that the state values accountability, thus deterring violence; that amnesties did not decrease future homicides in Guatemala; and that prosecution for wartime crimes cannot be proven to reduce criminal violence in a politicized environment. However, the potential of these processes to grant justice to victims and establish historical truth should not be understated. This research contributes to an understanding of peace processes necessary to effectively fulfill the responsibility of post-conflict societies to guarantee justice through the protection of human rights