Digital Commons Network^™

Acute Exposure Of American Oyster (Crassostrea Virginica) To Selected Antidepressant Drug: Histological, Biochemical, And Immunohistochemical Assessments, Md. Faisal Amin

Theses and Dissertations

The rapid increase in pharmaceutical use has brought significant health benefits to humans. Studies have shown that many pharmaceuticals, such as antidepressants, are often detected in surface waters, groundwater, and even drinking water. These pharmaceuticals in aquatic environments threaten marine life seriously. Marine bivalves are vital source of seafood for people worldwide. In this study, we examined the effects of short-term exposure to fluoxetine, an antidepressant used to treat depression, at low (0.5 μg/L) and high (5 μg/L) doses over a one-week period on American oysters (Crassostrea virginica) under controlled laboratory conditions. Histological analysis revealed atrophy in the gills and …

Environmental Controls Of Hail In Quasi-Linear Convective Systems, Cameron A. Barker

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

A study of hail occurrence in quasi-linear convective systems (QLCS), as well as severe weather parameters contributing to the likelihood and intensity of hail, is presented. Rapid Refresh (RAP) proximity soundings for 218 QLCS events from 2012 to 2022 are selected to sample QLCS environments near peak intensity. Study objectives are to assess common environmental parameter spaces that favor hail in QLCSs while connecting these findings to results for supercells. Hail occurrence is also examined in terms of synoptic regime.

Six synoptic regimes were identified to support QLCSs with hail, from high shear, low cape (HSLC) to low shear, high …

Technoscientific Imaging And The Territorialization Of Ocean Depth, João Afonso Baptista, Pedro Figueiredo Neto, Irus Braverman, Philip Steinberg, Gabriella Palermo, Stefan Helmreich, Melody Jue, John Childs

Journal Articles

Once the last unclaimed solid expanse on Earth, the ocean floor has become one of the most contested spaces in contemporary geopolitics. The data-imagery produced by technoscience serves as the ultimate tool for nations asserting sovereignty in this territorial race. This symposium gathers diverse perspectives on the ongoing expansionist drive on the seabed, drawing inspiration from Abissal——a film-article featuring the Portuguese modern odyssey on the ocean floor that serves as the symposium’s centerpiece. Aligned with modern ocean law, technoscience strives to render ocean depth visible to politics and territorializable for coastal states. However, the submerged prolongations and divisions it proffers …

A Relational Forestsoft Set Approach To Modeling And Optimizing Teaching Quality In University English Translation Programs Amid Digital Transformation, Jianguo Liu, Ruohan Liu

Neutrosophic Sets and Systems

No abstract provided.

Critical Communication Pedagogy At The End Of The World, Tyler S. Rife

Journal of Communication Pedagogy

This essay draws upon my experiences teaching the undergraduate course, “Communication at the End of the World,” to argue for an approach to critical communication pedagogy (CCP) contextualized by and reflexively responsive to planetary-scale ecological crises. I outline how five commitments have come to guide my classroom’s explorations through our topic of “end-times” communication: (1) Anthropocentrism and speciesism participate in the maintenance of social hierarchy; (2) environmental justice and social justice are intimately entangled projects; (3) ecological crisis is (re)made concrete, embodied, proximal, and implicative; (4) critique of language involves critique of humanism and humanist historicization; and, (5) ecologically just …

Adapting To Change In Amenity-Oriented Communities: Innovative Strategies For Shifting Social And Environmental Needs, Emma L. R. Epperson

All Graduate Theses and Dissertations, Fall 2023 to Present

Amenity-oriented communities are places with significant and desirable natural amenities that are highly visited and plentiful within the Intermountain West. These high rates of visitation create complex challenges such as congestion in recreation spaces and in towns and increase costs of living. These communities are typically rural and often do not have the resources, funding, or infrastructure to combat these challenges. Although tourists provide financial stability and other amenities to these towns, local wellbeing is highly impacted. Outdoor recreation and the nature connections derived from outdoor experiences are major contributors to wellbeing in amenity communities. This research investigates the changes …

The Recreation Opportunity Spectrum In Practice: A Classification Of Visitors And Sites In The Roaring Fork Valley, Colorado, Usa, Jessica Bruck

All Graduate Theses and Dissertations, Fall 2023 to Present

Researchers and public land managers continue to investigate what motivates visitors to recreate and how to best sustain environmental conditions to provide for these recreation demands and support conservation goals. Much recreation research has successfully identified visitor motivations at a single recreation area (spatial scale), but few studies broadly assess the manifestation of visitor motivations at an array of recreation areas that present unique recreation experience opportunities. Additionally, it is known that there are a diversity of visitor motivations and preferences, which presents a complex challenge to public land managers who must ensure that a diversity of recreation opportunities are …

Regulation Of Icer Degradation And Its Role In Melanoma, Justin Wheelan

Theses, Dissertations and Culminating Projects

Melanoma is the deadliest form of skin cancer, with 100,640 new cases and 8,290 deaths estimated in the United States in 2024. While targeted therapies and immunotherapy have improved patient outcomes, resistance remains a major challenge, necessitating new therapeutic approaches. Approximately 50% of melanomas harbor BRAFⱽ⁶⁰⁰ᴱ mutations, leading to constitutive MAPK pathway activation. Targeted small molecule therapies such as BRAF and MEK inhibitors are available and initially reduce tumor burden, however resistance frequently occurs, likely through many pathways including compensatory activation of cAMP signaling. ICER (Inducible cAMP Early Repressor), a transcriptional repressor of CREB-mediated gene expression, is absent in melanoma …

Conceptions Of Climate Change Skepticism: A Phenomenographic Investigation On Perspectives From Climate Scientists And Climate Activists, Candace L. Penrod

All Graduate Theses and Dissertations, Fall 2023 to Present

This study addresses how climate change denial is understood by climate scientists and climate activists. This research also investigates what communication strategies addressing climate change denial are used by climate scientists and climate activists. Phenomenography was selected as a methodology to address the qualitative and quantitative aspects of this inquiry. Pre-recorded data from interviews with six climate scientists and six climate activists living in the Intermountain West were used as the data source. Interview transcripts were read, marked, and coded to identify how climate scientists and climate activists understood climate change denial. Five conceptions of climate change skepticism were identified …

Migration As Adaptation: Place-Based Vulnerability Near The Drying Great Salt Lake, Dallin Johnson

All Graduate Theses and Dissertations, Fall 2023 to Present

The drying of the Great Salt Lake presents a complex and evolving threat to Utah residents, with wide-ranging environmental, economic, and health implications. This study explores the individual and structural factors impacting Utahns' ability to utilize migration as a form of adaptive capacity in response to these threats, using mobility justice and cumulative advantage and disadvantage theory as guiding frameworks. Drawing on survey data, a multilevel logistic regression model identifies key structural factors, including age, income, and gender, that influence perceived migration ability. Additionally, a 2x2 typology categorizes distinct profiles of vulnerability to the Great Salt Lake based on different …

Cognitive And Affective Factors Related To Geoscience Academic And Career Choice, Amanda Diane Manzanares

Dissertations

Recruitment and retention continue to be a challenge for Science, Technology, Engineering, and Math (STEM) fields. Research shows that both cognitive and affective factors influence student learning, which can then shape academic and career choice. Therefore, my alternatively formatted dissertation includes three articles examining two STEM disciplines: geosciences and Interdisciplinary Environmental and Sustainability programs adding to prior research and further uncovering specific factors that could predict student educational and professional aspirations.

Regarding cognition, students often begin STEM courses with pre-existing mental frameworks, also referred to as schemas that are formed by their prior experiences. These schemas may conflict with established …

Greening The Virtual: An Interdisciplinary Narrative Review On The Environmental Sustainability Of The Metaverse, Mousa Al-Kfairy

All Works

As the Metaverse continues to evolve as a transformative digital ecosystem, its environmental implications remain insufficiently examined within academic discourse. Despite growing interest in its technological and societal impacts, there is a lack of comprehensive evaluations that synthesize existing knowledge on its sustainability potential. This interdisciplinary narrative review addresses this gap by critically exploring how Metaverse technologies intersect with environmental sustainability across key sectors, including education, healthcare, tourism, e-commerce, manufacturing, and urban development. Employing a narrative review methodology informed by a systematic selection of scholarly and industry sources, the study consolidates current practices, emerging opportunities, and notable trade-offs. While the …

Microplastics And Other Plastic-Like Microdebris In Sediments From The Dart River And Estuary, Southwest England, Maia Killian, Andrew Turner

School of Geography, Earth and Environmental Sciences

Surficial sediment samples (n = 10) collected from a transect of a river-estuary (Dart) in southwest England have been analysed for geochemical characteristics, anthropogenic metals (Cr, Cu, Sn, Pb, Zn), and microplastics (∼50 μm–5 mm) and other microplastic-like debris. Results indicated the finest grains towards the lower river and upper estuary, a seaward increase in sedimentary Ca, and loss on ignition ranging from about 0.7 to 4 %. Anthropogenic metals were heterogeneously distributed throughout the catchment with maximum concentrations in the river or lower estuary. Microplastics were dominated by fibres, with concentrations ranging from 110 to 1800 kg−1 and composition …

A Multi-Proxy Approach For Understanding The Chicxulub Asteroid Impact (Cretaceous / Paleogene Boundary) And Its Aftermath, Hermann D. BermúDez

Theses, Dissertations and Culminating Projects

The Chicxulub asteroid impact in what is now the Yucatan Peninsula, Mexican Caribbean, coincides with the Cretaceous/Paleogene boundary (K/Pg boundary ~66Ma) and marked the extinction of three-quarters of the species, including the iconic non-avian dinosaurs. The collision created a massive crater, releasing enormous amounts of energy and expelling millions of tons of molten and vaporized materials into the atmosphere. Chicxulub is an ideal case study for massive impact events since it is the only recognized asteroid impact on Earth's history that preserved a globally traceable ejecta layer representing a precise time-stratigraphic marker. Although numerous studies have examined the consequences of …

Ocean-Ice Sheet Interactions During Super-Interglacial Mis 31: Comparison Of Rock Magnetic Records From The Scotia Sea (59.1°S) And Fram Strait (76.5°N), Olga Libman-Roshal

Theses, Dissertations and Culminating Projects

The mid-Pleistocene transition (MPT) was a period spanning ~1.2-0.7 Ma when glacial-interglacial cyclicity changed from 41 kyr obliquity paced to 100 kyr eccentricity paced cycles with increased glacial-interglacial contrast post-MPT. Marine Isotope Stage (MIS) 31 was a “super-interglacial” within the MPT and occurred in the recent geological past (1.08-1.06 Ma). During MIS 31, the tectonic configuration resembled the present day, but Earth’s orbital parameters were marked by maximum values of eccentricity and obliquity while atmospheric CO2 remained at pre-industrial levels (below 280 ppm). MIS 31 therefore offers a valuable baseline for testing the impacts of modern anthropogenic CO2 levels combined …

Environmental Studies, University Of Mississippi

University Website Migration from WordPress

No abstract provided.

Environmental Impacts Of Land Use Change In Industrial Areas, Dwi Nowo Martono, Aruminingsih Aruminingsih

Journal of Environmental Science and Sustainable Development

Industrial development in Indonesia has been predominantly concentrated on Java Island, particularly in Karawang Regency, West Java Province. Covering an area of 175,327 hectares, Karawang has been identified as a strategic region for national food security. The Minister of Agrarian Affairs and Spatial Planning designated 95,667.45 hectares of rice fields as protected agricultural land. However, the expansion of industrial and residential areas within the regency poses a significant threat to its role as the national rice granary and to broader food security. As industrial land occupancy increases, the environmental capacity to support rice production and ensure national food security declines. …

Indonesia In Brics: A Realist Perspective, Brice Tseen Fu Lee, Kotchaphop Kornphetcharat, Juan Pablo Sims

Journal of Strategic and Global Studies

Indonesia’s 2025 accession to BRICS (Brazil, Russia, India, China, and South Africa) appears at odds with the country’s long-standing bebas-aktif (“free and active”) tradition of non-alignment. This article explains the move through a layered realist approach and a purely theoretical, deductive method. First, the study integrates structural, offensive, and neoclassical realism to clarify four key mechanisms external balancing, hedging, relative gains, and status-seeking. It then maps propositions about what BRICS can offer Indonesia and tests them against existing realist scholarship on middle powers and emerging-power clubs. Analysis shows that BRICS chiefly serves as an external-balancing instrument, reducing Jakarta’s reliance on …

Highly Contaminated Sediments From The Gowanus Canal (New York) Superfund Site: An Environmental Forensic Approach, Michael A. Kruge, Kevin K. Olsen, Eric A Stern, Maria Mastalerz, Albert Permanyer

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

The 2.5 km long Gowanus Canal (Brooklyn, NY, USA) is a severely contaminated urban waterway dating from the mid-19th century, listed as a US Environmental Protection Agency (USEPA) Superfund site since 2010. Applying an environmental forensics approach to the extensive USEPA data set, we detect systematic variations in parent PAH ring number distributions in the canal sediments, as well as an extraordinary enrichment in organic carbon. We subjected a supplemental sample set to a more detailed analysis by quantitative pyrolysis-GC-MS, Rock-Eval pyrolysis, and organic petrology. With these sensitive methods, we can confirm the alkyl-PAH fingerprint of coal tar (a legacy …

The Impact Of Green Finance, Trade Openness, And Fossil Fuel Subsidies On Renewable Energy Consumption: A Global And Asia-Pacific Perspective, Alya Ryanti Fitjriyah, Inayati Nuraini Dwiputri

Journal of Environmental Science and Sustainable Development

Fossil fuels are the major source of global emissions, with the Asia-Pacific region being the climate biggest polluter. Despite the global efforts to shift to cleaner energy, fossil fuels still dominate the energy mix. Therefore, renewable energy adoption needs to be encouraged more to improve economic sustainability. The Glasgow Climate Pact emphasises the importance of helping developing countries in addressing the climate change issue through financial support, capacity building, and technology transfer. Hence, this study examines the influence of green finance, open trade, and fossil fuel subsidies on renewable energy adoption in 38 countries from 2017 to 2023. By using …

A Simulation Study On Effects Of Heifer Excreta On Herbage Yields And Potassium Uptake In Grazing Pasture, T Hakamata

IGC Proceedings (1977-2023)

Two models (a potassium cycling model and an excreta! spatial dispersion model) were constructed to clarify how biased dispersion of potassium(K) and herbage yields occur in a pasture. 18 cases [ ( unexcreted + (urine, dung) x 4 excreted months) x (grass + legume)] were simulated by the K cycling model to obtain standing crops of K and herbage at the end of a growing season. The standing crops per 1 m2 were calculated on all the quadrats in the pasture by using the excreta! dispersion model. The standing crops in each of 18 cases were assumed to be normally …

Advancing Interactive Web Cartography Through Designing And Developing An Open-Source, Data-Driven Framework For Accessible Geovisualization Of Geospatial (Big) Data, Sarigai Sarigai

Geography ETDs

The growth of geospatial big data has intensified the demand for open-source, accessible tools for interactive spatial exploration. This dissertation introduces a modular web mapping framework and details its design, extension, and evaluation to advance geovisualization through user-centered, transferable design. The first study presents the original framework, named dciWebMapper, establishing foundational cartographic and information visualization principles, with a focus on modularity and extensibility. The second study extends dciWebMapper with advanced capabilities—such as diverse map types, bivariate visualizations, temporal filtering, spatial querying, and hotspot analysis—and demonstrates its broad transferability across domains. The third study offers a structured usability evaluation of …

Experienced Latinx Urban Gardeners In San Jose, Ca, Offer Strategies For Climate Justice And Resilience, Claudia S. Damiani Fontana

Master's Theses

Low-income and underinvested communities will be disproportionately affected by climate change due to limited resources, inadequate infrastructure, and insufficient support systems. Urban gardeners are responding to the need to adapt to new climate conditions while sustaining their food sources and cultural practices. Many have adapted thanks to local interventions led by the government and non-profit agencies. For this study, I partnered with La Mesa Verde (LMV), a gardening and food justice program that works with low-income Latinx families in San José, and I documented the contributions of experienced Latinx gardeners, especially those with agricultural backgrounds, to climate-resilient gardening in San …

Citizen Science Helps Monitor Urban Biodiversity: An Interactive, Data-Driven, And Open-Source Perspective, Katie Slack

Geography ETDs

Story maps, a powerful tool for communicating environmental narratives, are often commercial and lack many interactive functions. We integrate a data-driven and interactive geovisualization within an open-source story map created from high-attribute citizen science datasets. This story map creates a backend programming infrastructure for accessible, open-source science communication tools. Our story map intuitively communicates the findings from our web map application (app) portion of the story map to the public and helps reveal findings from the iNaturalist datasets. Albuquerque, New Mexico, United States is a demonstrative case study, but our tools can be flexibly adapted to other cities. Geovisualizations revealed …

Nitrogen Fixation In Pampinifervens, A New Species-Rich Genus Of Aquificaceae That Inhabits A Wide Ph Range In Terrestrial Hot Springs., Marike Palmer, Nancy O. Nou, Lara A. Turello, Carolyn E. Power, John C. Ong, Jonathan K. Covington, Dengxun Lai, Xavier Mayali, Anna-Louise Reysenbach, Yan-Ling Qi, Jeremy A. Dodsworth, Yitai Liu, Multiple Additional Authors

Center for Life in Extreme Environments Publications

Members of the Aquificota play important roles in hydrogen, sulfur, and carbon cycles in geothermal systems as ubiquitous and abundant chemolithoautotrophs; however, their roles in the nitrogen cycle are poorly defined. Here, we show that Aquificaceae isolate T-2 from Tengchong, China, fixes nitrogen based on growth with dinitrogen as the sole nitrogen source and incorporation of N atoms when grown with N. We further show evidence that suggests its nitrogen fixation (nif) genes are transcribed in situ in a nearby spring. We propose the name Pampinifervens diazotrophicum gen. et sp. nov., with strain T-2 (= JCM 35475 = DSM 116324) …

Advancing Diamond Quantum Sensors: Isotropic Flux Concentrators And Phase Noise Mitigation, Maziar Saleh Ziabari

Optical Science and Engineering ETDs

Two methods for improving the sensitivity of nitrogen vacancy quantum sensors in diamond are explored. First, by passively concentrating the magnetic flux, three orthogonally oriented ferrite truncated cone pairs amplify the field isotropically by 19 times, allowing measurement of Earth's field without a bias field and increasing sensitivity. Through thorough analysis, modeling and tuning a novel 3-dimensional flux concentrator system, we achieve a fractional standard deviation of less than 1% anisotropy and quantify minimal deadzones and ambient temperature-limited variations below 40 nT/hour. Second, we characterize, model and calculate phase noise in NV experiments, which in NV sensors is effectively indistinguishable …

Soft Power: Brics Cultural Diplomacy And The Rebalancing Of Global Narratives, Brice Tseen Fu Lee, Kotchaphop Kornphetcharat, Juan Pablo Sims

International Review of Humanities Studies

BRICS has broadened its agenda beyond finance to cultivate soft power through coordinated cultural diplomacy. Examining official statements, press releases, and scholarly commentary on the bloc’s flagship film, sports, and ministerial initiatives, this article shows that cooperation is advancing from one-off spectacles toward structured, recurring institutions. Findings indicate two simultaneous dynamics: outwardly, BRICS venues amplify Global-South perspectives that diversify international cultural flows; inwardly, member states use the same platforms to signal national prestige, revealing persistent status competition. The result is an early but uneven cultural architecture—one that counters Euro-Atlantic narrative dominance yet has not crystallized into a fully coherent BRICS …

Full Issue - Spring 2023 - Volume 110, Issue 1, Colby College

Colby Magazine

Spring 2023, vol. 110 no. 1

04: From the Editor
05: Table of Contents
06. Downtown Colby
14. Diagnosing Autism More Precisely
16. An Inside Pitch
22. Colby's New Labs Address Critical Issues and Initiatives
26. In Support of the Academic Mission
28. A Building for Everybody
36. Robust Financial Aid Program is Key to Colby's Mission
38. 'Quite a Triumph'
44. Class Notes
66. Obituaries
80. William R. Cotter, Colby's Longest-Tenured President

How Effective Are Engineered And Non-Engineered Riparian Forest Restoration Projects In Providing Salmonid-Quality Habitat In The San Francisco Bay Area?, Alexander Ivanov

Master's Theses

Streams and their riparian zones in the San Francisco Bay Area have been degraded, severely harming salmonid populations in the region. Ecological restoration is a common approach to return stream function. Such restoration projects vary widely in intensity, from low-impact vegetation removal/planting to highly engineered projects involving structures and grading. This research investigated the effectiveness of streams restored using engineered versus non-engineered solutions in supporting salmonid habitat viability in San Francisco Bay Area streams. Fourteen streams, seven from each of the two types of restoration, were sampled in the wet and dry season in 2024, three times each season. Data …

Public Support For Puma Reintroduction In The Eastern United States, L. Mark Elbroch, Jazmin J. Murphy, Shelby C. Carlson, John A. Vucetich, Richard E.W. Berl, Lexi Galiardi, Shelby Perry, Tom Butler, Neil Carter, Joseph W. Hinton, Axel Moehrenschlager, Emily Carrollo, Rana Bayrakcismith, Jeremy T. Bruskotter

Michigan Tech Publications

Pumas (Puma concolor) are among the species identified as having the potential to enhance ecosystem function. Previous research highlights sufficient ecological habitat to support pumas in the eastern United States; however, their reintroduction requires social and institutional support as well. To this end, we conducted research to assess attitudes about puma reintroduction among key constituencies like hunters, rural residents, and young people. We sampled 2756 respondents across seven states (Massachusetts, Maine, New Hampshire, New York, Pennsylvania, Vermont, and West Virginia). Ratios of strong support (for puma reintroduction) to strong opposition across states ranged from 4:1 to 13:1, and support outweighed …