Digital Commons Network^™

Measurements And Analysis Of Light Non-Methane Hydrocarbon Mole Fractions In 1982–1987 At Six Remote Sites Along The Pacific Rim, A. M. Smith, C. L. Butenhoff, M. A. K. Khalil, A. L. Rice

Physics Faculty Publications and Presentations

Atmospheric non‐methane hydrocarbons (NMHCs) are important trace species with anthropogenic and natural sources including fugitive emissions from fossil fuel mining and distribution, biomass burning, biofuel combustion, and biogenic emissions from microbes and plants. We present previously unpublished whole air sample measurements of NMHCs collected at approximately weekly intervals from 1982 to 1987 at six stations spanning the Northern and Southern hemispheres, which sampled primarily Pacific Basin air masses as determined by back‐trajectory analysis. The four alkanes in this data set, ethane, propane, i‐ and n‐butane had a mean measured mole fraction of 712 ± 22 ppt, 245 ± 13 ppt, …

Attacks On Merchant Vessels Under The Law Of Economic Naval Warfare And Protection Of The Marine Environment: Lessons From The Russia-Ukraine War And The U.S.-Iran War, Alexander Lott

International Law Studies

This article examines the legality of attacks on merchant vessels during international armed conflicts, using reported Russian, Ukrainian, Iranian, and United States attacks between 2022 and 2026 as case studies. It evaluates belligerent rights to visit and search, divert, seize, disable, or, exceptionally, destroy merchant vessels under customary law. Drawing primarily on State practice, the study compares Russia’s blockade of Ukraine, Iran’s closure of the Strait of Hormuz, and the United States’ blockade of Iran. The emerging concept of a de facto blockade and its fusion with warning zones creates legal uncertainty and undermines humanitarian protection.

The legality of Iranian …

Beetle Panic!, Ross Lowrance

Game Design

Beetle Panic! is a 3D game designed in GDevelop that combines exploration, collectible-based scoring, time management, and enemy avoidance in a compact, interactive level. Players navigate the environment to collect four coins, each worth 25 points, while managing a 60-second timer and avoiding a pursuing enemy known as the Beetle Bot. Environmental objects, including movable blocks, provide opportunities for tactical interaction by obstructing the enemy's movement. Contact with the enemy resets the scene, adding risk to the player's efforts to complete the objective before time expires.

The game incorporates a scoring system, countdown timer, audio feedback, and end-state messaging to …

Marbs & Carbs, Kevin M. Mcghee

Game Design

Marbs & Carbs is a 3D rolling game set in an oversized kitchen. Guide Marb across countertops, past stove burners, and through sink-side shortcuts while collecting pasta and donuts that make the marble grow. Larger sizes open new routes, including a breakable sink drain. Collect at least 25 carbs to enter the mouse hole and finish the level. Special pasta can turn Marb into a tumbling cube or pyramid, changing how it moves and adding a score bonus. A results screen tallies your pickups and time before the next run.

This game is inspired by the classic Atari arcade game …

Sociolinguistic Compatibility In Ai Adoption: Extending Doi - Toe In Public Relations, Shadi Abu-Ayyash

CoHSS Faculty Work

Purpose - This study examines how AI adoption in public relations (PR) unfolds in the Arab region and positions that experience against global industry discourses, with attention to the linguistic and cultural conditions that shape adoption trajectories.

Design/methodology/approach – Guided by Diffusion of Innovations (DoI) and the Technology–Organization–Environment (TOE) framework, the study combines 20 semi structured interviews with senior Arab-region practitioners, association leaders and academics across six countries with a directed content analysis of professional guidelines and industry reports of global, cross-regional and regional scope.

Findings – Adoption is early-stage and selective, concentrated in content assistance, media intelligence and reputation …

Genetic Inheritance Of Leaf Rolling As An Adaptive Trait For Fog Capture And Drought Tolerance In Wheat, Sabah Merrium, Zulfiqar Ali, Latifa Alhusnain, Muneera D.F. Alkahtani, Sadia Hakeem, Sajid Fiaz, Muhammad Ali Sher, Kotb A. Attia, Seung Hwan Yang, Muhammad Abu Bakar Saddique, Muhammad Hammad Nadeem Tahir

Turkish Journal of Agriculture and Forestry

Wheat is a primary source of sustenance for around 2 billion people worldwide; however, its production is threatened by the water scarcity associated with climate change. In the search for climate-smart wheat varieties, atmospheric moisture in the form of fog and dew is gaining attention as a sustainable, self-irrigating water source for crops. Leaf rolling (LR) is a well-known adaptive trait under water deficit conditions that supports fog moisture capture in wheat; however, little is known about its genetic potential and inheritance pattern, particularly given its high environmental influence. This study assesses the genetic heritability, combining ability, and diversity of …

Valorization Of Buttermilk As A Functional Ingredient In Yogurt Soup: Effects On Physicochemical Properties, Aroma Profile, Amino Acid Composition, And Bioactivities, Emi̇ne Maci̇t, Fatma Zehra Özyilmaz

Turkish Journal of Agriculture and Forestry

​In this study, the feasibility of using buttermilk as a functional ingredient in yogurt soup, a traditional fermented dairy product, was investigated with the aim of valorizing dairy industry by-products. Soup samples prepared with different buttermilk ratios (0%, 25%, 50%, 75%, and 100%) were evaluated for their physicochemical and sensory properties, aroma and amino acid profiles, antioxidant capacity, and antidiabetic activity. The incorporation of buttermilk resulted in statistically significant differences in total solids, ash, and titratable acidity (p < 0.01 and p < 0.05), while no significant changes were observed in fat, protein, or pH values. Increasing buttermilk levels led to higher L* and b* values and lower a* values. Sensory analysis showed that flavor scores increased with buttermilk content, with the highest score observed in the sample containing 100% buttermilk (T5). In the control sample, hexanoic acid, benzoic acid, acetic acid, methyl salicylate, and several ketones were identified as dominant aroma compounds, whereas buttermilk-enriched samples were characterized mainly by hexanoic acid, acetic acid, butanoic acid, ethyl acetate, higher alcohols, and ethanol. Increasing buttermilk content resulted in a higher proportion of alcohols and a reduction in acids, ketones, and aldehydes. Samples with higher buttermilk levels exhibited increased essential amino acid content, while functional amino acids such as γ-aminobutyric acid, β-aminoisobutyric acid, ethanolamine, proline, and alanine reached their highest levels in the T5 sample. The T5 sample showed a DPPH radical scavenging activity of 5.98%, whereas the highest α-amylase inhibition was observed in the control sample. Overall, the results indicate that buttermilk can be effectively used as a functional ingredient in yogurt soup formulations, improving nutritional quality and sensory characteristics.

A Study Of Booster Seat Education In An Elementary School Setting, Rosanina Carlotta Ketchum

Theses

The leading cause of death in children five to nine years old is motor vehicle accidents (MVA). Booster seats decrease the risk of injury during MVA’s, and knowledge deficit is a frequently listed reason for the non-use of booster seats. A descriptive quantitative research method was undertaken using a survey design to evaluate the effectiveness of parental booster seat education in the elementary school setting in increasing booster seat use among 4- to 8-year-olds in one Oklahoma community. A chi-square test of independence found that parents who attended booster seat education sessions had higher rates of consistent booster seat use …

Tuber Yield Amplification In Dahlia Variabilis L. Under Humic Acid And Fertilizer Combinations, Kedar Mahadev Gheware, Nomita Laishram, Arvinder Singh, Sarabdeep Kour, Sourav Sharma, Aytan Samadova, Melekber Sülüşoğlu Durul, Hali̇l İbrahi̇m Tuzlaci

Turkish Journal of Agriculture and Forestry

Dahlia variabilis L. is a valued tuberous ornamental crop grown worldwide for its attractive flowers. Optimizing nutrient management is crucial for maximizing dahlia growth and tuber yield. In this field study, we evaluated the combined effects of humic acid (HA) and chemical fertilizers on the tuber production of Dahlia variabilis L. A factorial randomized complete block design was used with treatments combining three fertilizer levels (100%, 75%, and 50% of recommended NPK dose) and multiple HA treatments. HA was applied as a soil amendment and foliar spray in combination with inorganic NPK fertilizer. Results showed that integrating HA with reduced …

Bioactive Compounds In Fruits Of Newly Introduced Sweet Cherry Cultivars In Herzegovina, Jasmina Aliman, Mirjana Radović, Ahmed Džubur, Jasna Hasanbegović, Dženan Vukotić, Aleksandra Šupljeglav Jukić, Senad Murtić, Mihajlo Lizdek

Turkish Journal of Agriculture and Forestry

This study evaluated the biochemical characteristics and bioactive compounds of 3 newly introduced Italian sweet cherry cultivars (Sweet Valina, Sweet Stephany, and Sweet Gabriel) grown under the agroecological conditions of Herzegovina (Mostar and Trebinje). The analysis included total soluble solids, total acidity, sweetness index, total phenolic contents, total flavonoid contents, and antioxidant capacity in fruit skin and flesh. Significant differences were observed among cultivars, locations, and their interactions for most analyzed parameters. Fruits from Trebinje generally exhibited higher antioxidant capacity, total phenolic contents in the skin, soluble solids contents, and sweetness index values. Sweet Valina, particularly at the Trebinje location, …

2026-2027 Performance Forum - October 16, 2026, Rishi Gurnani, Sheng Yuan Kuan, Paola Nava, Hyunwoo Jeoung, Juanita Jaimes, Andrew Bures, Michael Shipps, Adam Weekes, Pual Brown

Performance Forum

No abstract provided.

Retraction Notice To “Characterization Of Tfiie-Regulated Genes By Transcriptome Analysis” [Turkish Journal Of Biology, Volume 48, Issue 6, Pages 442–455,Https://Doi.Org/10.55730/1300-0152.2718], Turkish Journal Of Biology

Turkish Journal of Biology

This article has been retracted.

Following concerns raised after publication, the matter was referred to the TÜBİTAK Committee on Research and Publication Ethics (AYEK) for investigation. An Expression of Concern was published while the investigation was ongoing; it was published in the Turkish Journal of Biology, Volume 49, Issue 3, https://journals.tubitak.gov.tr/biology/vol49/iss3/11/.

The investigation has now been concluded. Based on the findings, the project idea and research design underlying the study were used without appropriate attribution or permission. The investigation also determined that a researcher who had contributed to the intellectual foundation of the work—including the development of the …

Enhancing Access To Resources Using Third Iron’S Libkey Nomad, Alicia Ikerd, Victoria Peters

Library Faculty Publications

This presentation describes how a liberal arts college’s academic library used Third Iron’s LibKey Nomad++ tool in order to connect their campus constituents to library subscribed resources from anywhere across the web. This presentation highlights some challenges specific to implementing domain messaging to appear across DePauw University’s resources, how we determined what resources to highlight, and how we have imported Third Iron’s usage data into SpringShare’s LibInsight in order to have a dashboard view of product impressions and clicks. The presentation also identifies ways that the usage statistics were incorporated into a dataset, and it describes methods applied as well …

Characteristics Of Immersion Freezing Ice Nucleating Particles During Dust Season In Beijing, Ke Cao, Manni Chen, Zhaolong Wu, Angnuo Tian, Yangze Ren, Kai Bi, Ping Tian, Qinghong Zhang, Huiwen Xue

Michigan Tech Publications

Atmospheric dust is a primary source of ice nucleating particles (INPs), yet their concentrations at temperatures warmer than −20°C are not fully characterized during Asian dust events. This study uses a membrane filtering method to collect aerosol samples and a droplet freezing method to measure daily immersion-mode INP concentrations in Beijing during the dust season throughout March 2022. Daily aerosol samples are categorized into low, moderate, and heavy dust conditions using volume depolarization ratios from a Micro Pulse Lidar (MPL). Observed INP spectra exhibit a day-to-day variability of up to two orders of magnitude at a given temperature. The INP …

Ballet And Latin Dance: A Master Class With Ballet Five Eight, Miranda Rubio Opsal

LAII Events

Join Miranda Rubio Opsal, professional dancer and teaching artist with Ballet Five Eight, for a master class combining classical ballet technique with movement from the company's original production of La Llorona. The class will begin with a traditional ballet barre, followed by an opportunity to learn excerpts from La Llorona, a contemporary ballet inspired by the legendary figure of Mexican folklore. Students will explore the musicality, expressive movement, and Latin dance influences that help bring this powerful story to life.

Miranda Rubio Opsal is a Chicana dancer and educator. She is a Company Artist and School Principal with …

Molecular Evidence For The Atmospheric Transformation Of Trash Burning Aerosol Into Organonitrate- And Organosulfate-Rich Haze: A Case Study From The Eastern Indo-Gangetic Plain, Amna Ijaz, Susan Mathai, Zezhen Cheng, Simeon Schum, Nurun Nahar Lata, William Kew, Claudio Mazzoleni, Lynn Mazzoleni, Swarup China

Michigan Tech Publications

Open burning of solid waste is projected to contribute up to 29% of global anthropogenic PM2.5 emissions, yet its role in secondary aerosol formation remains largely absent from current assessments. Using 21-T Fourier transform-ion cyclotron resonance mass spectrometry, we show that fresh trash burning organic aerosol (tbOA) in the Indo-Gangetic plain, specifically West Bengal, India, during wintertime is dominated by more volatile, low-oxygenation CHO species (66% of the formulae), including markers of plastic and biomass combustion. The downwind ambient aerosol in haze was dominated by less volatile, highly oxygenated organonitrates and organosulfates (>85% of the formulae), consistent with substantial …

Conversion Of Typha Latifolia (Cattails) To Organic Acids Via Acidogenic Fermentation For Use In Reductive Bioleaching Of Metals, Rebecca Kwofie, Palas Kamlakar Borkar, Daniel Amponsah Berko, Vincent Bailey Arohunmolase, Timothy Eisele

Michigan Tech Publications

The sustainable production of organic acids from non-food lignocellulosic biomass is critical for advancing circular bioeconomy strategies and reducing reliance on chemically synthesized leaching agents. This study investigates acidogenic fermentation of untreated Typha latifolia, an abundant wetland biomass, to generate organic acids suitable for bioleaching. Rather than focusing on yield maximization, this work identifies key operational controls governing acidogenic performance. A full factorial design evaluated organic loading (2–6% w/v), oxygen availability (aerobic vs. anaerobic), biomass condition (fresh vs. dried), and manganese supplementation (0–50 ppm) across batch and continuous systems. Oxygen availability emerged as the dominant control variable (p < 0.05), consistently controlling solution acidification dynamics (pH drop and rate of decline), which served as a consistent operational indicator of acidogenesis. Anaerobic conditions enabled rapid pH reduction to 4.5–5.0 within 3–5 days, while fresh biomass significantly enhanced acid production due to the availability of fermentable sugars. Manganese supplementation influenced acidification rates through synergistic interactions with biomass condition but did not control final acid yield. High-performance liquid chromatography confirmed acetic acid as the primary product (262.75 mg/L), alongside lactic and formic acids, indicating mixed-acid fermentation pathways. Biomass-to-acid organic acid production reached approximately 50% under optimal conditions, demonstrating the feasibility of direct bioconversion. Semi-continuous operation simplified process control, with oxygen regulation sufficient to maintain stable acidogenic performance. These findings establish that process simplicity, specifically, untreated biomass and oxygen-controlled fermentation, can outweigh traditional yield-focused strategies at scale. The results provide a practical framework for integrating biomass valorization with hydrometallurgical processes, enabling the direct use of fermentation-derived organic acids as reagents in reductive bioleaching systems.

Robogestdb, Sriparvathi Shaji Bhattathiri, Behnam Kazempour, Ehsan Rashedi, Michael E. Kuhl

Data

RoboGestDB is a multi-modal (RGB-D) dataset of 15 gestures designed for communication between humans and autonomous mobile robots (AMRs) in industrial environments such as warehouses. The release includes 54,000 gesture instances from 50 participants, with each gesture captured simultaneously as an RGB image, a depth image, a 3-second RGB video, and a 3-second depth video using three synchronized Intel RealSense D435 cameras. The gesture set spans four functional categories: signaling human movement intent, issuing AMR motion commands, emergency override controls, and bidirectional human-robot acknowledgments. Recordings were collected under a full factorial design varying interaction distance (3 m, 7 m), lighting …

Hyperopic Reserve, Early Myopia Risk And Screening Strategies In Children: A Multi-Regional Analysis From The Cream-Kids Consortium, Cream-Kids Consortium, Wei Pan, Síofra Harrington, Gareth Lingham, Michael Moore, Li Lian Foo, Sander C.M. Kneepkens, Dirk J. Van Hemert, Kathryn Saunders, Sara Mccullough, Katie Willams, Olavi Pärssinen, Rigmor C. Baraas, Lene A. Hagen, Amanda French, Seang Mei Saw, Jason Yam, Caroline Klaver, Ian Flitcroft, Weizhong Lan

Research Outputs: 2025-Present

Reduced hyperopic reserve (HR) in early childhood is a strong predictor of future myopia. A harmonized dataset from the CREAM-Kids Consortium was utilized to assess regional differences in HR. Among 7-year olds, mean (SD) HR was 1.44 (1.17) D in Europe, 1.32 (0.80) D in Australia, 0.78 (0.89) D in Hong Kong, and 0.59 (0.66) D in Singapore (p < 0.001). The annualized decline in HR was −0.12 D/year among European-Australian followed from age 6.73 (0.64) to 11.64 (1.49), and −0.35 D/year among Asian followed from age 7.71 (0.77) to 10.71 (0.77). In European-Australian aged 6–7, the sensitivity and specificity of myopia screening was 67%–75% and 98%, and in Asian aged 4–9, 92%–99% and 70%–77%, respectively. Asian children demonstrated substantially lower HR and a faster consumption than their European and Australian peers, placing a larger proportion of Asian children at higher risk for early-onset myopia.

Harassment Risks, Reporting Decisions And Institutional Responses During Hospitality Internships In Ghana, Ebenezer Junior Afful, Yaa Akubia

ICHRIE Research Reports

Hospitality internships can expose students to sexual harassment while leaving them uncertain whether reporting will bring protection or further risk. This study examined exposure, reporting decisions and perceived institutional response among hospitality students in Ghana. It combined a survey of 277 students from three technical universities with follow-up interviews involving 13 participants. Among valid responses, 27.0% reported personally experiencing harassment, while 30.4% reported witnessing it during placement. Only 43.2% of personal incidents and 38.3% of witnessed incidents were reported. Interviews showed that silence was shaped by normalised conduct, customer-service expectations, supervisory power, fear of consequences, unclear reporting routes, and distrust …

Enhancing Vocational Milling Machine Learning Through Powerpoint Hyperlink-Based Interactive Media, Ilham Bayu Haliludin, Marsono Marsono, Yayi Febdia Pradani, Yuli Panca Asmara

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

The advancement of educational technology has led to the development of innovative learning media to improve student engagement and learning outcomes. This study aimed to develop and evaluate the feasibility and effectiveness of PowerPoint Hyperlink-based interactive learning media for milling machine material. The research employed the Research and Development (R&D) method using the 4D model, consisting of the Define, Design, and Develop stages. The research subjects were 20 tenth-grade students of the Machining Engineering Department at SMK Muhammadiyah 1 Kepanjen. The research instruments included expert validation sheets, questionnaires, pretest-posttest assessments, and documentation. Data were analyzed descriptively, while the effectiveness of …

On A Remark Of De Gennes Concerning Three-Dimensional Polyelectrolytes, Shiquan Li, Carl Mueller

Journal of Stochastic Analysis

This work is inspired by a remark of de Gennes [3] about polyelectrolytes, which are charged polymers. A common model for a polymer is a self-avoiding or self-repelling random walk or Brownian motion. For polyelectrolytes, the repelling potential is the Coulomb potential arising from pairs of charged particles. We show that in the continuous case of a Brownian motion in three dimensions, the spread of the polymer, in particular the radius of gyration of a polyelectrolyte of length T grows linearly with T, up to logarithmic corrections.

How Wide Is The Screening Window For Aggressive Non-Small Cell Lung Cancers? The Cure Threshold Metric And Its Implications For Lung Cancer Screening Guidelines, Deborah Goldwasser

Mathematics Colloquium Series

The entire NSU community, including students at all levels of mathematics, is invited and encouraged to attend. A reception with coffee and snacks will take place in the Department of Mathematics Suite Parker 320 from 12:00-12:30 just prior to the colloquium talk. Abstract: Lung cancer screening by low-dose computed tomography (LDCT) has demonstrated a mortality reduction in two large randomized controlled trials. However, LDCT also frequently identifies benign pulmonary nodules in high-risk but otherwise healthy individuals. The management of small pulmonary nodules is guided primarily by malignancy probability.  However, the surgical cure threshold, the maximum tumor size at which surgical …

Internship At Jubilee Usa Network And Global Debt Relief, Robert John Ladao

Undergraduate Research and Engagement Symposium

My Presenation is about my internship experience at Jubilee USA Network, in Washington D.C. I was apart of the LUC in DC program.

Jubilee USA is an interfaith, global non-profit advocating for global poverty reduction through global debt relief.

I was tasked with the role of Development and Executive Associate. This role required donor interfacing and checking processing. The role strengthened my leadership and analytical skills.

Unpaid Academic Internship Award- Avance, Sebin Chirayil

Undergraduate Research and Engagement Symposium

Sebin is currently interning at Avance Counseling, located in the Lincoln Square neighborhood of Chicago. Avance provides therapeutic services for individuals primarily referred through the court system or DCFS, including domestic violence, substance abuse treatment, anger management interventions, parenting coaching, and individualized mental-health counseling. In this role, Sebin assists counselors with case management services, intake interviews, mental health evaluations, and integrated summaries. He also shadows various group counseling sessions. Through this experience, Sebin is deepening his understanding of evidence-based therapeutic approaches and how they can be applied to support the long term recoveries of individuals.

Internship Experience At The Epilepsy Foundation Of Greater Chicago, Madeleine Espinoza

Undergraduate Research and Engagement Symposium

This presentation highlights my internship experience with the Epilepsy Foundation of Greater Chicago, where I served as a Health Equity Intern on the Health Equity, Education, and Advocacy team. During this internship, I developed health communication materials, created educational social media content, conducted research, and analyzed community health data. My work focused on improving awareness, accessibility, and support for individuals living with epilepsy. This experience strengthened my understanding of health equity, public health communication, and chronic disease advocacy while allowing me to apply classroom knowledge to real-world public health practice.

Trash Trap: Comparing Plastic Pollution In The Chicago River And Chicago’S Montrose Harbor, Thomas Botsford-Rhodes

Undergraduate Research and Engagement Symposium

Pollution from trash, especially plastic, is a growing environmental and public health concern, intensified by climate change. Urban lakes and rivers are major pathways for litter entering oceans, making them key targets for prevention and removal. This study examined litter entering a Lake Michigan marina and the Chicago River. Debris was collected using a Marina Skimmer at Montrose Harbor (8 weeks) and a Seabin near the Wrigley Building (23 weeks). Samples were dried, sorted, and weighed. Results indicated plastic was the most common material, with dominant categories including large (>3mm) and small (<3mm) fragments and food-related waste. These findings can inform targeted public education and policy efforts to reduce litter.

Internship With United States Senator Tammy Duckworth, Katie A. Hernandez

Undergraduate Research and Engagement Symposium

As an intern, I support constituent services and legislative operations by managing active casework, coordinating with federal agencies on immigration, veterans’ affairs, and administrative matters to help secure expedited processing, financial assistance, and timely resolutions. I assist in drafting and reviewing legislative memoranda on federal policy issues, including materials submitted to oversight bodies. I also serve as the sole DEIA Initiative Intern across six offices, contributing to newsletter development, stakeholder engagement, and internal policy implementation. In addition, I draft letters supporting federal grant applications and manage constituent correspondence, ensuring accurate documentation and timely responses across high-volume communications channels.

Using Status Characteristics Theory To Predict A Jury Foreperson, Mohona Mandal, Shane Thye

Feminist Pedagogy

The topic of social inequality as it relates to status structures is a foundational topic taught in many courses in contemporary sociology.  Today the theory of status characteristics and expectation states (SCT) is the predominant account of the causes and effects of status stratification in groups. The purpose of this paper is to share a classroom exercise that explicates the connections between SCT and critical theory, specifically intersectionality as an analytic framework. Using only the basic theoretical assumptions, students apply the underlying logic of SCT to predict who was selected as the jury foreperson based on brief biographies of each …

Theory In Service Of Students: Feminist Pedagogy, Status Processes, And Rotating Leadership, Alison J. Bianchi

Feminist Pedagogy

No abstract provided.