Digital Commons Network^™

Tunable Shock And Vibration Damping In Metal Laser Powder Bed Fusion Components Via Controlled Post-Print Compaction Of Particle Damper Cavities, Joud N. Stame, Yanzhou Fu, Samuel Roberts, Austin Downey, Tianyu Zhang, Lang Yuan, Daniel Kiracofe

Faculty Publications

Components manufactured by Laser Powder Bed Fusion (LPBF) can incorporate particle dampers (PDS) by retaining unfused powder within internal pockets, providing inherent vibration suppression without added mass or separate damping components. This study investigates the damping performance of such LPBF-integrated PDs through two complementary approaches: (1) quantifying the effect of post-printing volume compression on energy absorption by mechanically indenting the damper pocket, and (2) evaluating how variations in particle packing density influence the dynamic response under both sinusoidal and transient impulse excitation. Experimental results from shaker and shock testing demonstrate that increased packing density, whether by compression or tighter confinement, …

Examining Reporting And Risk-Avoidance Intentions Among Residents Of High-Crime Neighborhoods: Results From A City-Wide Survey Experiment, Paige E. Vaughn, Matt Vogel

Faculty Publications

Objectives

Examine how offense severity and victim–offender relationship shape intentions to report violence and engage in avoidance behaviors among residents of high-crime neighborhoods.

Methods

A 2×2 factorial survey experiment was embedded in a community survey of 220 adults from nine high-crime St. Louis, MO neighborhoods. Logistic regression models estimated vignette effects on reporting and avoidance intentions.

Results

Firearm presence increased intentions to contact police and community workers and avoid risk. Simple assaults by strangers were more likely to be reported to police than those by acquaintances. Respondents expressed willingness to report to police and family or friends, but not community …

A Place To Breathe: High School Students’ Perceptions Of A School-Based Wellness Center, Devan Clayton, Elizabeth Cutrer, Paul Caldarella, Michael Richardson, Jared Warren

Faculty Publications

Adolescents face significant academic and emotional stressors, underscoring the need for accessible school-based mental health support. This qualitative study examined high school students’ (N = 17) perceptions of a school-based wellness center, including both users and non-users. Four focus groups were analyzed using Interpretative Phenomenological Analysis to explore experiences, perceived benefits, and barriers to use. Students described the center as a calming, supportive space that aided emotional regulation, short-term recovery, and readiness to return to class. Users emphasized relational connection, belonging, and managing stress and anxiety in a safe, nonjudgmental environment. Students also viewed the center as fostering early …

Hidden Costs Of Ethical Fashion: Sustainable Development Goals And Garment Worker Exploitation In Bangladesh, Md. Rafiqul Islam Rana M.S., Ph.D.

Faculty Publications

Across garment factories in the Global South, the promise of “ethical fashion” coexists with poverty wages and retaliation. This study examines why the global call for decent work has not improved labor conditions in Bangladesh's ready-made garment industry. Twelve semistructured interviews with production workers were thematically analyzed through Critical Theory and Labor Process Theory. Five persistent problems emerged: wage manipulation, audit and compliance evasion, silencing of worker voice, restrictions on mobility, and the disposal of older workers. A single positive theme, workplace safety and child-labor prevention, showed limited progress. Overall, sustainability rhetoric remains symbolic while buyer cost pressures drive exploitation. …

Hidden Costs Of Ethical Fashion: Sustainable Development Goals And Garment Worker Exploitation In Bangladesh, Md. Rafiqul Islam Rana M.S.,Ph.D

Faculty Publications

Across garment factories in the Global South, the promise of “ethical fashion” coexists with poverty wages and retaliation. This study examines why the global call for decent work has not improved labor conditions in Bangladesh's ready-made garment industry. Twelve semistructured interviews with production workers were thematically analyzed through Critical Theory and Labor Process Theory. Five persistent problems emerged: wage manipulation, audit and compliance evasion, silencing of worker voice, restrictions on mobility, and the disposal of older workers. A single positive theme, workplace safety and child-labor prevention, showed limited progress. Overall, sustainability rhetoric remains symbolic while buyer cost pressures drive exploitation. …

Designing Space-Based Architectures To Discover And Track Hazardous Asteroids Using Mo-Mcts, Adam P. Wilmer, Michael J. Klonowski, Marcus J. Holzinger, Robert A. Bettinger

Faculty Publications

The discovery and tracking of near-Earth objects (NEOs), such as asteroids and comets, form the foundation of any effective planetary defense mitigation strategy—that is, the process of reducing or eliminating the threat these objects pose to humanity. Establishing sufficient warning time prior to a potential Earth impact is a critical outcome of this capability, as it enables informed decision-making and the selection of viable mitigation options. This study investigates how to optimally pre-position a fleet of NEO discovery and tracking (D&T) spacecraft within the Sun-Earth system. Candidate architectures—one or more pre-positioned spacecraft—are designed using Multi-Objective Monte Carlo Tree Search (MO-MCTS). …

Heterogeneity Of Treatment Effects In Transcranial Direct Current Stimulation For Knee Osteoarthritis Pain And Symptoms, Chiyoung Lee, Xiaoxiao Sun, Juyoung Park, Chen X. Chen, Christine Pellegrini Ph.D., Nan-Kuei Chen, David O. Garcia, Heewon Kim, C. Kent Kwoh, Hyochol Ahn

Faculty Publications

Introduction: Although heterogeneity of treatment effects (HTEs) is commonly observed in clinical trials, it has received little attention in studies on transcranial direct current stimulation (tDCS).

Objectives: This study identified the presence of HTE in tDCS treatment among participants with symptomatic knee osteoarthritis (KOA) and explored participant characteristics associated with this heterogeneity.

Methods: This secondary analysis of a randomized clinical trial included 120 participants with symptomatic KOA who received 15 daily sessions of home-based 2-mA active or sham tDCS over 3 weeks. We used a multitrajectory analysis to identify distinct subgroups based on the longitudinal trajectories of KOA pain and …

Heterogeneity Of Treatment Effects In Transcranial Direct Current Stimulation For Knee Osteoarthritis Pain And Symptoms, Chiyoung Lee, Xiaoxiao Sun, Juyoung Park, Chen X. Chen, Christine Pellegrini, Nan-Kuei Chen, David O. Garcia, Haewon Kim, C. Kent Kwoh, Hyochoi Ahn

Faculty Publications

Introduction: Although heterogeneity of treatment effects (HTEs) is commonly observed in clinical trials, it has received little attention in studies on transcranial direct current stimulation (tDCS).

Objectives: This study identified the presence of HTE in tDCS treatment among participants with symptomatic knee osteoarthritis (KOA) and explored participant characteristics associated with this heterogeneity.

Methods: This secondary analysis of a randomized clinical trial included 120 participants with symptomatic KOA who received 15 daily sessions of home-based 2-mA active or sham tDCS over 3 weeks. We used a multitrajectory analysis to identify distinct subgroups based on the longitudinal trajectories of KOA pain and …

The Influence Of Mentoring On Educational Attitudes, Beliefs, And Behaviors (Eabbs): A Scoping Review, Amanda L. Davis, Jennifer Koide, Savannah B. Simpson, Samuel Mcquillin, Michael D. Lyons

Faculty Publications

Youth mentoring is a popular means for preventing negative psychosocial outcomes (e.g., high-risk behaviors, school dropout) and promoting positive ones (e.g., matriculation, goal setting). Mentors matched with youth through formal programs, such as Big Brothers Big Sisters, are uniquely positioned to promote the development of the mentee’s positive educational attitudes, beliefs, and behaviors (EABBs; e.g., academic engagement, grit, growth mindset). While school staff, such as school psychologists, are often unable to directly serve all students in need of support due to lack of time or large caseloads, youth mentoring may be a means to target EABB development. However, a critical …

English Diphthongs For English Learners: The Same, But Different, Kristin Lems

Faculty Publications

In any language, diphthongs need to be reckoned with, but teaching diphthongs to learners of English as a new language requires greater insight and special skills. In this column, we take a look at English diphthongs, why they matter, and how they might be best handled when teaching English language learners.

Natural Convection Of Cuo-Water Nanofluid Flow Along A Vertical Plate With Variable Thermophysical Properties And Discrete Heat Sources, Nepal Roy, Ioan Pop, Rama Subba Reddy Gorla

Faculty Publications

Effects of discrete heat sources along a vertical plate are of practical importance due their occurrence in electronic devices. For growing demand of electronic appliances and their advancement, cooling processes of them must be improved. As usual fluids have limited heat transfer, nanofluids made by dispersing nanoparticles into them are utilized to enhance thermal performance. However, flow characteristics and heat transfer of a nanofluid for discrete heat sources along a vertical plate need to be explored. For this reason, this study analyzes the natural convective heat transfer and flow behaviors of CuO-water nanofluid induced by discrete heat sources along a …

“El Concilio De Buen Manejo” Spmdtu Council No. 2, Capulín, Colorado, José A. Rivera Ph.D

Faculty Publications

From among the sixty-four local councils affiliated with the Sociedad Protección Mutua de Trabajadores Unidos (SPMDTU), Council No. 2 at Capulín was among the earliest organized, quickly grew in membership, and was known for its attention to recordkeeping of minutes, financial ledgers, and attendance logs. The council was established around 1901, and by midcentury a history of the SPMDTU noted: “Este concilio siempre ha tenido buen manejo. Tiene buena propiedad con su propio salón y ha llegado a tener buen número de miembros.” (This council has always enjoyed good management. It has a nice property with its own …

Conflict As Catalyst: The Role Of Conflict In Creating Political Space For Women, Christie S. Warren

Faculty Publications

Although the benefits associated with the presence of women in political decision-making positions are uncontested, global statistics relating to the number of women in political leadership roles paint a disappointing picture of underutilized resources. While rights-based advocacy, quotas, and economic incentives are commonly posited as effective strategies to increase the number of women active in public spaces, several studies have shown that the law alone is not sufficient to bring about changes in gender norms unless the underlying structural constructs that perpetuate inequalities privileging dominant groups are addressed first. Conflict, especially when driven by rejection of those inequalities, can hasten …

Beyond A Protagonist Bias In Narrative Identity Research: Methods For Identifying Master Narratives In Interview Data, Andrew D. Coppens, Jayson Seaman, Cindy Hartman

Faculty Publications

This article advances a methodological shift in narrative identity research by addressing the field’s protagonist bias – the tendency to rely on first-person autobiographical accounts as the primary evidence for identifying cultural master narratives. We integrate Erikson’s psychosocial identity framework, Vygotsky’s “tool and result” methodological insight, and sociolinguistic approaches to narrative to develop a three-stage analytic logic: (1) identifying small-n narratives through scenes conveyed in discourse; (2) grouping these into Big-N narratives that cohere thematically across scenes (Tannen, 2007, 2008); and (3) assessing candidate master narratives using McLean and Syed’s (2016) five criteria. We demonstrate this approach through a case …

Wildfires, Smoke Pollution, And Household Purchasing Behaviors, Tamara Sheldon, Crystal Zhan

Faculty Publications

In this paper, we investigate households’ behavioral responses to wildfires in California to understand their mitigation and adaptation strategies. We combine daily household-level consumer purchase data from the NielsenIQ Consumer Panel with detailed wildfire incident and smoke exposure data from various sources. Our analysis reveals that wildfires reduce retail trips and overall spending, both in-store and online, likely due to evacuations. However, wildfire-driven smoke increases purchases of essential goods, indicating adaptive behavior. More experienced households tend to respond more cautiously, and we observe heterogeneity in responses based on income, age, and pre-existing health conditions. These findings highlight the complexity and …

Radiation Protection Factor Research: The Keystone For Conventional-Nuclear Integration (Cni), Andrew W. Decker

Faculty Publications

This article briefly describes Defense Threat Reduction Agency (DTRA) vehicle Radiation Protection Factor (RPF) research and explains its critical role in enabling future Operations in a Nuclear Environment (ONE) and Conventional-Nuclear Integration (CNI) on behalf of the US Department of War (DoW).1 As such, the background and practical utility of RPF values is discussed, as well as the justification for renewed Army and DoW investment into RPF research to enhance Joint military planning, survivability, and lethality on tomorrow’s nuclear battlefields. Advances in DTRA RPF research directly strengthen US strategic and extended deterrence efforts and support all Agencies and Departments responsible …

Regulation Of Zygotic Genome Activation By The Nucleocytoplasmic Ratio, Lily Acker, Hui Chen

Faculty Publications

During early development, embryos undergo the maternal-to-zygotic transition (MZT), when control of development shifts from maternal factors to the newly activated zygotic genome. Decades of studies in various model organisms suggest that the nucleocytoplasmic (N/C) ratio is a key regulator of zygotic genome activation (ZGA), though this relationship is more nuanced in some organisms than others. Changing the nuclear content, nucleus size or cell size has been shown to shift the timing of ZGA. Mechanistically, the N/C ratio is linked to fundamental cellular processes that regulate genome activities, including nuclear import, repressor titration, activator accumulation, cell cycle lengthening, and chromatin …

Who Is Presidential? Women’S Political Representation, Deflection, And The 2016 Election, Kaitlin M. Boyle, Chase B. Meyer

Faculty Publications

In 2016, Hillary Clinton was the first woman to gain the presidential nomination from a major political party in the United States, yet she was unsuccessful. The current study explores barriers to being elected as president for women generally and Hillary Clinton specifically. Using the propositions and tools of affect control theory, we demonstrate how women’s political representation shapes cultural sentiments about women and the president. In a nationwide sample of Americans surveyed shortly before the election, we find women’s representation on the state level influences voter preferences through these cultural sentiments: More women in politics makes a woman president …

General Timing Games With Multiple Players, Alexander Matros, Vladimir Smirnov, Andrew Wait

Faculty Publications

We examine innovation in an n-player market-entry timing game with complete information and observable actions. In our novel multi-player setup, we allow for heterogeneous payoffs between players and leader payoff functions to be multi-peaked and non-monotonic, only requiring that followers’ payoffs are non-increasing with the time of the leader’s entry. We outline the conditions under which an n-player asymmetric game leads to standard second-mover advantage and preemption equilibria. In the context of a two-player game, we provide a comprehensive characterization of the pure-strategy equilibria for a general case. This includes the potential for the emergence of a new …

A Livelihood Intervention Improved Nutritional, Mental Health And Sexual Health Outcomes Among Hiv-Affected Adolescents In Western Kenya: Results From The Shamba Maisha Randomised Controlled Trial, Sheri D. Weiser, Lila Aziz Sheira, Pauline Wekesa, Jennifer Monroe Zakaras, Edward A. Frongillo Jr. Ph.D., Elly Weke, Jason M. Nagata, Amy A. Conroy, Marguerita Lightfoot, Torsten B. Neilands, Lisa M. Butler, Elizabeth A. Bukusi, Craig R. Cohen, Maricianah Atieno Onono

Faculty Publications

Introduction Interventions that address household-level factors, including food insecurity (FI) and poverty, may reduce HIV risk and improve sexual and reproductive health (SRH) among adolescent girls and young women (AGYW).

Methods This cluster randomised controlled trial in Kenya assessed AGYW living in households of adults enrolled in Shamba Maisha (SM). SM was a multisectoral agricultural livelihood intervention designed to improve HIV health. At the trial end, we used linear and logistic regressions to compare differences between the intervention and control arms in FI, and mental health among AGYW-caregiver pairs and SRH outcomes among the AGYW, accounting for clusters with robust …

What Factors Influence Health Professions Trainees’ Preferences For Employment In Rural Appalachia? A Qualitative Study To Inform The Design Of A Discrete Choice Experiment, Chris Gillette, Jan Ostermann Ph.D., Aylin A. Aguillar, Sarah O'Neal, Chris Everett, Dawn Caviness, Esita Patel, Laiton Steele, Dawn Goel, Quazi Minhaz Tabassum

Faculty Publications

Optimizing the geographic allocation of health care providers has the potential to improve health care access and health outcomes for rural populations. To inform the design of a discrete choice experiment (DCE) survey to elicit health professions trainees' preferences for rural practice, this formative research aimed to: (1) elicit factors that influence job selection among health profession trainees, including medical residents physician assistant (PA) and nurse practitioner (NP) students, (2) identify how these trainees evaluate trade-offs for rural job placement and (3) inform attribute selection for inclusion into a future DCE to identify health professions trainees’ preferences for rural practice. …

Predictors Of Employment Attrition In Lebanon During Multifaceted Crises: The Role Of Chronic Diseases – A National Cross-Sectional Study, Myriam Dagher, Ali Abboud, Ghada E. Saad, Rita Itani, Rindala Fayyad, Hala Ghattas Ph.D., Stephen J. Mccall, Jocelyn Dejong, Malak Ghezzawi, Nisreen Salti, Sasha Fahme, Serena Canaan

Faculty Publications

The COVID-19 pandemic and Lebanon’s ongoing economic crisis exacerbated existing workforce and health disparities. This study explored the predictors of employment attrition during Lebanon’s concurrent crises and examined the association between chronic conditions and employment attrition. This cross-sectional study recruited adults aged 19–64 years residing in Lebanon through random digit dialing (January – July 2024). Data collected included socio-demographics, household characteristics, employment history and characteristics, and self-reported chronic conditions. The outcome was loss of paid employment (employment attrition) during the crises. Predictors were identified through a Least Absolute Shrinkage and Selection Operator (LASSO) regression, and model discrimination and calibration were …

Mechanical Performance Of Equilateral Triangular Lattices: The Role Of Nodal Fillets, Fakhreddin Emami, Andrew J. Gross

Faculty Publications

Triangular lattices are widely employed for their high strength to weight ratios, yet their mechanical performance is sensitive to geometric features, particularly the nodal geometry. This study investigates the influence of nodal geometry on the mechanical behavior of equilateral triangular lattices across a broad range of relative densities using high fidelity finite element simulations. We characterize the elastic properties, and strength limits as functions of fillet radius. Our results confirm the expected trend that, in stretching-dominated lattices with low relative density, the introduction of fillets reduces both stiffness and buckling resistance. In contrast, at higher relative densities, filleted nodes can …

Dietary Inflammatory Index And Objective Disease Activity In Ibd: No Association Found, Rúbia Moresi Vianna De Oliveira, Ana Carolina Junqueira Vasques, Stefhani Andrioli Romero, Nitin Shivappa Mbbs, Mph, Ph.D., Michael David Wirth, James Hébert Scd, Glaucia Fernanda Soares Ruppert Reis, Cristiane Kibune Nagasako

Faculty Publications

Background

Inflammatory Bowel Disease (IBD) involves genetic and environmental factors, but the relationship between disease activity, adiposity, and diet remains unclear.

Objective

To investigate the association between endoscopic/radiological activity of IBD, body adiposity, and the Dietary Inflammatory Index with or without adjustment for energy density (E-DII or DII).

Method

An observational, cross-sectional study was carried out. Endoscopic activity was defined by an endoscopic Mayo score >2, Crohn’s Disease Endoscopic Index of Severity (CDEIS) > 5, and/or the presence of a deep ulcer in any intestinal segment. Body adiposity was estimated using the body mass index, waist circumference, and waist-hip ratio (WHR). …

Circulating Levels Of Insulin-Like Growth Factor I (Igf-I) And Risk Of Multiple Myeloma: An Observational And Mendelian Randomisation Study, Yolanda Benavente, Sara Hermosa, Nikos Papadimitriou, Alyssa I. Clay-Gilmour Ph.D., Elizabeth E. Brown, Jonathan N. Hofmann, Nathaniel Rothman, Qin Lan, Sonja I. Berndt, Demetrius Albanes, Mark Purdue, Mitchell J. Machiela, Stephen J. Chanock, Parveen Bhatti, Wendy Cozen, Aaron Norman, Susan L. Slager, James R. Cerhan, Vincent Rajkumar, Et. Al.

Faculty Publications

No abstract provided.

Social Control And Neglect At A Crossroads: Unpacking The Interactive Effects Of Residential Segregation And Violence On Pretrial Detention, Paige Vaughn, Joshua H. Williams

Faculty Publications

Racial segregation and violent crime are both important predictors of jurisdiction-level criminal justice outcomes, yet little research has examined their influences on front-end detention patterns and how they may interact to shape local punishment practices. The current study uses official sources and Vera Institute of Justice data spanning 1496 decennial county-years (374 counties from 1980 to 2010) to examine the independent and combined effects of county-level racial segregation and violent crime on pretrial detention rates. Drawing on group threat and minority neglect arguments, we find that high segregation levels are associated with neglect, especially in violent areas. Reduced segregation between …

Optimizing Warranty Policies For Remanufactured Products: When Should They Be Longer, Shorter, Or Identical To New Product Warranties?, Kunpeng Li, Jun-Yeon Lee

Faculty Publications

Manufacturers adopt different warranty strategies for remanufactured products, offering shorter, identical, or longer warranty periods compared to new products. However, prior research has only focused on manufacturers offering either shorter or identical warranties. In addition, the existing literature has not captured the diminishing returns of warranties, i.e., as the warranty coverage increases, its incremental benefits begin to decrease but the costs continue to increase. To address these gaps, we develop an optimization model that jointly considers pricing and warranty decisions while accounting for warranty’s diminishing effect on consumer’s willingness to pay for remanufactured products. We show that all three observed …

Of Epistemes And Insects: How Drosophila And Butterflies Shape Our Understanding Of Radiation Risk, Donna M. Goldstein, Magdalena E. Stawkoski

Faculty Publications

This paper explores the complexities of extrapolating insect data to understand nuclear exposure effects on humans. Within radiation research, animal studies are invaluable tools for understanding biological effects of radiation exposure. However, data are often employed selectively, exposing unsettled science in extrapolating animal data to human radiation effects. Here we focus on our understanding of the genetic effects of radiation exposure, and how the debates about the long-term effects on humans were molded by research carried out on the model organism known as Drosophila; disagreements among scientists occurred within the constraints of research on this model organism, creating what …

Explaining Variability In Employee Perceptions Of Hr Practices In Strategic Hrm Research: An Integrative Review And Future Outlook, Jeske Van Beurden, Susanne Beijer, Kaifeng Jiang, Karina Van De Voorde, Anthony Nyberg

Faculty Publications

Employee perceptions of human resource (HR) practices have become a central focus in strategic human resource management(HRM) research due to their impact on individual and organizational outcomes. Recent studies highlight the importance of un-derstanding how these perceptions are formed, what they encompass, and why they vary across employees. This special issue ofHuman Resource Management aims to advance this evolving area of research by focusing on variability in employee perceptionsof HR practices. We review the current literature on employee perceptions of HR practices, including (1) theoretical and concep-tual clarity of the employee perceptions of HR practices construct, (2) antecedents of these …

Comprehensive, Multidisciplinary Care For Fragile X-Associated Tremor/Ataxia Syndrome, James A. Bourgeois, Andrea Schneider, Jessica Klusek Ph.D., Ccc-Slp, Thomas R. Christensen, Ellie Levin, Kendall Gardner, Ariel A. Jacobi, Randy J. Hagerman

Faculty Publications

Objective: 

The authors reviewed the pathophysiology, clinical genetics, phenotype, and comprehensive clinical management of Fragile X-associated Tremor/Ataxia Syndrome (FXTAS), a neurodegenerative disorder affecting FMR1 premutation carriers (55–200 CCG repeats).

Participants: 

A multispecialty and multidisciplinary team of authors with backgrounds in psychiatry, pediatrics, clinical psychology, speech and language pathology, and neurosciences.

Evidence: 

Review of English language sources on the clinical phenomenology, genetics, pathophysiology, and clinical management of FXTAS from 2001 (the original report) through 2025, with emphasis on the general medical, psychiatric, and neurological features of FXTAS and its multispecialty and multidisciplinary clinical management.

Consensus process:

All authors contributed to the …