Digital Commons Network^™

Mill Power Consumption And Fuel Particle Size Distribution While Co-Milling Bituminous Coal With Steam-Exploded Woody Biomass In A Conventional Bowl Mill, Brian Schoof, Rajarshi Roy, Regan Kuttler, Parker Latour, Scott Montgomery, Jacob Tuttle, Gwendolyn Bennett Bennett, Brian D. Iverson, Andrew Fry

Faculty Publications

The mill behavior of a 312 Combustion Engineering Raymond Bowl Mill was studied with five blends of Utah bituminous coal and steam-exploded woody biomass, ranging from 100 % coal to 100 % biomass. Mill power consumption increased with biomass content, peaking at 187 % of the power required for 100 % coal before the mill faulted at 100 % biomass. After repositioning the rollers, power consumption for 100 % biomass decreased by 13 % compared to 100 % coal. SEM images revealed that milled biomass particles were non-spherical, indicating some fibrous structure remained post steam-explosion. The particle size distribution (PSD) …

Permutations Minimizing The Number Of Collinear Triples, Joshua Cooper, Jack Hyatt

Faculty Publications

We characterize the permutations of Fq whose graph minimizes the number of collinear triples and describe the lexicographically-least one, confirming a conjecture of Cooper-Solymosi. This question is connected to Dudeney’s No-3-in-a-Line problem, the Heilbronn triangle problem, and the structure of finite plane Kakeya sets. We discuss a connection with complete sets of mutually orthogonal latin squares and state a few open problems primarily about general finite affine planes.

Prosecuting Families, Anna Arons

Faculty Publications

Hundreds of thousands of parents are prosecuted in the family regulation system each year. Their cases are investigated by family regulation agencies and prosecuted by lawyers employed by the government—family regulation prosecutors. Like police and prosecutors in the criminal legal system, this family regulation prosecutorial team wields immense power, particularly over race–class subjugated communities. Yet even as scholarship on criminal prosecutors and on the family regulation system has proliferated, the role of family regulation prosecutors has gone underexamined and undertheorized.

This Article offers a critical examination of the role of these family regulation prosecutors. Drawing on a variety of primary …

International Society Of Sports Nutrition Position Stand: Β-Hydroxy-Β-Methylbutyrate (Hmb), John A. Rathmacher, Lisa M. Pitchford, Jeffrey R. Stout, Jeremy R. Townsend, Ralf Jäger, Richard B. Kreider, Bill I. Campbell, Chad M. Kerksick, Patrick S. Harty, Darren G. Candow, Brandon M. Roberts, Shawn M. Arent Ph.D., Cscs*D, Fissn, Facsm, Fnak, Douglas S. Kalman, Jose Antonio

Faculty Publications

Position Statement: The International Society of Sports Nutrition (ISSN) bases the following position stand on an analysis of the literature regarding the effects of β-Hydroxy-β-Methylbutyrate (HMB). The following 12 points have been approved by the Research Committee of the Society: 1. HMB is a metabolite of the amino acid leucine that is naturally produced in both humans and other animals. Two forms of HMB have been studied: Calcium HMB (HMB-Ca) and a free acid form of HMB (HMB-FA). HMB-FA appears to lead to increased appearance of HMB in the bloodstream when compared to HMB-Ca, though recent results are mixed. 2. …

The Development Of A Rag-Based Artificial Intelligence Research Assistant (Aira), Hamid Vakilzadeh, David A. Wood

Faculty Publications

No abstract provided.

Browsing Within An Academic Library, Holt Zaugg, Jillian Bunderson

Faculty Publications

Purpose – Browsing library resources is a method long used by researchers to expand their understanding of ill-defined projects and to have serendipitous research discoveries. This study sought to understand the browsing activities of students in an academic library. Design/methodology/approach – The study used two methods. First, a link to an online survey was posted on posters throughout the library inviting students to share their browsing experience. Second, library security officers (student employees) were asked to count the number of people browsing within the stacks as they conducted their hourly walk-throughs of the library. Browsing was broadly defined as anyone …

The Information Content Of Private Information Acquisition: Evidence From Foia Requests To The Sec, Dichu Bao, Janja Brendel, Michael S. Drake, Lixin (Nancy) Su

Faculty Publications

We analyze Freedom of Information Act (FOIA) requests submitted to the Securities and Exchange Commission (SEC), focusing on the value-relevance hypothesis and the directtrading hypothesis. Our empirical analysis reveals nuanced value relevance associated with different types of requests: Requests related to ongoing investigations and submitted by anonymous requesters are negatively correlated with future returns, while requests from investment firms and intellectual property firms predict positive future returns. Our findings also provide some support to the direct-trading hypothesis, showing that investment firms increase holdings of stocks for which they have filed FOIA requests, and short sellers exhibit heightened activity following requests …

Variation In Early 20th Century Rural Utah English, Joseph A. Stanley, Hallie Davidson

Faculty Publications

Utah English Pronunciation

Early 20th Century Utah English:

• Early work (Cook 1969, Helquist 1970) compares rural Utah to Salt Lake City.
• Bowie (2003, 2008, etc.) analyzes archival recordings of religious sermons.
• Primary focus in those studies: the decline of the CORD-CARD merger.

Introducing the Kohler Tapes

Background:

• Norm Kohler, a middle school teacher in Heber in 1980s–2000s.
• He had students to interview a local older person, like a grandparent.
• He provided questions to ask, akin to sociolinguistic interviews.
• Collected 1200+ cassette tapes.
• Intended to write a history based on these oral narratives.

Processing:

• Digitized in 2021 at BYU’s Office of …

Studying Repeat Victimization: A Consideration Of Measurement Issues, Christi Metcalfe, Robert Brame, Tara E. Martin, Angela R. Gover

Faculty Publications

Decades of research have recognized the phenomenon of repeat victimization and its policy relevance. Although there are continuing efforts to explain the theoretical underpinnings of repeat victimization, there are still measurement-related issues that limit our understanding of the topic and ability to inform interventions, including varying operational definitions, data constraints, and sampling and nonsampling error. In this article, we review theoretical advances in the literature over the past decade, propose operationalizations that can foster greater consistency across studies, comprehensively assess the data constraints around commonly used public data sources to study repeat victimization, and empirically demonstrate how one of these …

Intensive Longitudinal Models, Robert E. Ployhart, Paul D. Bliese, Sam D. Strizver

Faculty Publications

Intensive longitudinal models (ILMs) allow researchers to analyze nested data collected through frequent measurements—typically 20 or more repeated occasions—over densely spaced durations. Rather than being a single statistical approach, ILMs encompass various models unified by their capability to handle densely collected longitudinal data. We briefly summarize the nature of intensive longitudinal designs and why such designs require the use of ILMs. We then provide a classification typology to help readers understand the features of an ILM they should adopt. This classification typology provides the structure for a narrative review of existing ILM research. We conclude with specific recommendations for using …

How Overcoming Linguistic Discrimination Benefits The World, Joseph A. Stanley, Lisa Morgan Johnson, Eve Okura Koller, Vashti Wai Yu Lee, Hallie Davidson, Valeria Prieto Hurtado, Sam Keddington, Hazel Mattson, Abigail Mueller, Sydney Jo Pederson, Maryn Perschon, Reese Rugg, Eliza Whiting

Faculty Publications

What is linguistic discrimination?

• Restricting access or opportunities based on speech (e.g., accent, pronunciation, grammatical system, tone or pitch)
• One of the last socially acceptable discriminatory practices in the international community
• A source of injustice that impacts many of God’s children every day

Linguistic discrimination is real! Here’s what it looks like…

In Healthcare:

• More questions about insurance coverage; later appointments (Wisniewski and Walker 2020)
• Lower access to mental health services (Kugelmass 2016)
• More referrals for speech therapy (Charity Hudley et. al. 2018)

In Education:

• Students receiving negative judgments from teachers (Bowie & Bond 1994; Cecil 1988; Wheeler 2019)
• Teachers …

The Serendipity Of Discovery: Life Of A Geochemist, Willard S. Moore

Faculty Publications

My strategy for writing this autobiography is to use examples of how working on seemingly different projects can often lead to outcomes more important than originally envisioned. Serendipity is a "happy accident"; specifically, the accident of discovering something useful without directly looking for it. This often occurs when two research projects converge unexpectedly. The main text contains examples of how serendipity has led me to important discoveries including: (a) finding surprisingly high ²²⁸Ra activities in the ocean, (b) developing a means of rapidly and quantitatively extracting radium from seawater, (c) devising a rapid, sensitive method of measuring ²²⁴Ra …

Longitudinal Viral Load Clustering For People With Hiv Using Functional Principal Component Analysis, Yunqing Ma, Xueying Yang Ph.D., Jiayang Xiao, Xiaoming Li Ph.D., Bankole Olatosi Ph.D., Jiajia Zhang Ph.D.

Faculty Publications

Background: Longitudinal measures of viral load (VL) are critical in monitoring the HIV status. While multiple lab indicators exist for monitoring measures of VL, research on clustering historical/longitudinal VL measures is limited. Analyzing longitudinal VL patterns rather than aggregated measures offers deeper insights into HIV status. This study uses functional data clustering to classify longitudinal VL patterns and characterize each cluster by demographics, comorbidities, social behaviors, and CD4 count.

Methods: Adult PWH diagnosed from 2005 to 2015 in South Carolina with a 5-year minimum follow-up were included. We compared functional principal component analysis (FPCA), K-means, hierarchical clustering, and Gaussian mixture …

Temporal Changes In Racial Disparities Of Hiv Linkage To Care From 2013 To 2020: A Statewide Cohort Analysis, Fanghui Shi, Katherine E. Weaver, Chen Zhang, Bankole Olatosi Ph.D., Jiajia Zhang Ph.D., Sharon Weissman, Xiaoming Li Ph.D., Xueying Yang

Faculty Publications

Background: Racial disparities have historically existed regarding HIV care outcomes, including linkage to care. This study aims to explore the contribution of contextual features (e.g., socioeconomic and structural environmental factors) to the temporal change of county-level racial disparities in linkage to care.

Methods: This is a statewide population-based retrospective cohort study. The patient-level variables in the South Carolina HIV registry system were used to calculate the aggregated county-level linkage to care percentage. Then, we used four indices to measure racial disparities in the county-level percentage of timely linkage to care, i.e., the Black-White ratio, index of disparity (ID), weighted ID, …

Harnessing Big Heterogeneous Data To Evaluate The Potential Impact Of Hiv Responses Among Key Populations In Sub-Saharan Africa: Protocol For The Boloka Data Repository Initiative, Refilwe Nancy Phaswana Mafuya, Edith Phalane, Amrita Rao, Kalai Willis, Katherine Rucinski, K. Alida Voet, Amal Abdulrahman, Claris Siyamayambo, Betty Sebati, Mohlago Seloka, Musa Jaiteh, Lerato Lucia Olifant, Katharine Journeay, Haley Sisel, Xiaoming Li Ph.D., Bankole Olatosi Ph.D., Neset Hikmet, Prashant Duhoon, Francois Wolmarans, Yegnanew A. Shiferaw, Lifutso Motsieloa, Mashudu Rampilo, Stefan Baral

Faculty Publications

Background: In South Africa, there is no centralized HIV surveillance system where key populations (KPs) data, including gay men and other men who have sex with men, female sex workers, transgender persons, people who use drugs, and incarcerated persons, are stored in South Africa despite being on higher risk of HIV acquisition and transmission than the general population. Data on KPs are being collected on a smaller scale by numerous stakeholders and managed in silos. There exists an opportunity to harness a variety of data, such as empirical, contextual, observational, and programmatic data, for evaluating the potential impact of HIV …

Longitudinal Assessments Of Viral Rebound Among People With Hiv In South Carolina: A Population-Based Cohort Study, Jiayang Xiao, Xueying Yang Ph.D., Yunqing Ma, Bankole Olatosi Ph.D., Sharon Weissman, Xiaoming Li Ph.D., Jiajia Zhang Ph.D.

Faculty Publications

Routinely monitoring viral rebound (VR) is important in the life course of people with HIV (PWH). This study examined risk factors for time to the first VR, the number of VRs and their association with VR history in men who have sex with men (MSM). It includes 8176 adult PWH diagnosed from January 2005 to December 2018, followed until July 2021. We used the Cox model for time to the first VR, the Poisson model for a number of VRs, and logistic regression for VR history in MSM. Younger individuals (50–59 years vs 18–29 years, aHR: 0.43, 95% CI: [0.34, …

Maternal Vulnerability Index And Severe Maternal Morbidity, Nansi S. Boghossian, Joshua Radack, Molly Passarella, Ciaran S. Phibbs, Lucy T. Greenberg, Jeffrey S. Buzas, George R. Saade, Jeannette Rogowski, Scott A. Lorch

Faculty Publications

Importance: Few studies have investigated the association of composite measures of neighborhood social determinants of health with severe maternal morbidity (SMM), and no research has examined this association for indices tailored to maternal health. Objective: To examine the association of scores in the Maternal Vulnerability Index (MVI), a tool developed to measure maternal risk of adverse health outcomes, with SMM. Design, Setting, and Participants: This retrospective, population-based cohort study was conducted in 5 states (2008-2020 for Michigan, Oregon, and South Carolina; 2008-2018 for Pennsylvania; and 2008-2012 for California) among individuals delivering a fetal death or a live birth between 22 …

Caregiving Burdens Of Task Time And Task Difficulty Among Paid And Unpaid Caregivers Of Persons Living With Dementia, Matthew Lee Smith, Jodi L. Southerland, Malinee Neelamegam, Gang Han, Shinduk Lee, Chung Lin Kew, Juanita Dawne R. Bacsu, Elyse Couch, Steffi M. Kim, Monique J. Brown Ph.D., Mph, Ayse Malatyali, Lucas Wilson, Zahra Rahemi, Jeremy Holloway, Marcia G. Ory

Faculty Publications

Background: Demands of caregivers of persons living with dementia (PLWD) are often influenced by the context of their caregiving situation. This study examines common and unique factors associated with caregiving burden in terms of task time and task difficulty among paid and unpaid caregivers of PLWD. Methods: Cross-sectional baseline survey data were analyzed from 107 paid and unpaid caregivers of PLWD participating in a larger NIH-funded study assessing the feasibility of using a novel in-situ sensor system. Oberst Caregiving Burden Scale constructs of task time and task difficulty served as dependent variables. Two least squares regression models were fitted, controlling …

Investing In The Development Of The Next Generation Of Mch Leaders, Karen A. Mcdonnell, Jamal Percy, Lisa Anders, Monique J. Brown Ph.D., Mph, Alice R. Richman, Julianna Deardorff, Monica S. Ruiz, Jihong Liu Sc.D., Kelli Russell, Audrey Snyder, Cassondra Marshall

Faculty Publications

The public health landscape is constantly evolving to address the strengths and needs of the community. Training for the public health workforce is leading the way, establishing an ecosystem approach that integrates individuals within social, political, and environmental contexts to promote health equity within a framework of social justice. One area of public health that is innovatively preparing the next generation of leaders is maternal and child health (MCH). In the United States, key indicators of health disparities within MCH remain stagnant, highlighting the need for training programs that develop future MCH professionals from diverse backgrounds. These professionals will deliver …

Associations Between County-Level E-Cigarette-Inclusive Tobacco 21 Law Population Coverage And E-Cigarette Use Behaviors Among United States Adolescents In Monitoring The Future, James H. Buszkiewicz, Catherine A. Vander Woude, Yanmei Xie, Steven Cook, Bukola Usidame Peters, Megan E. Patrick, Michael R. Elliott, James F. Thrasher Ph.D., Ma, Ms, Nancy L. Fleischer

Faculty Publications

Background and aims: In the United States (US), Tobacco 21 (T21) laws set the minimum legal sale age for all tobacco products to 21 years. This study aimed to examine whether e-cigarette-inclusive T21 laws were associated with e-cigarette use behaviors and related disparities among US adolescents. Design: We used nationally representative, repeated cross-sectional Monitoring the Future data to compare self-reported current e-cigarette use (2014–2022) and first e-cigarette initiation (2015–2022) among adolescents in counties with 100% ('full') versus < 100% ('partial or no') e-cigarette-inclusive T21 law population coverage using modified Poisson regression, examining differences by sex, race and ethnicity, parental educational attainment and college educational expectations through interactions. Setting: United States. Participants: 8th, 10th and 12th graders. Measurements: County-level e-cigarette-inclusive T21 law population coverage was determined using Tobacco 21 Population Coverage Database and US Census Bureau population data. Current e-cigarette …

Healthcare Providers’ Perspective On Hiv Testing And Hypothetical Mhealth-Connected Linkage To Care Among Men Who Have Sex With Men (Msm) In South Carolina, Tony Brown, Prince Nii Ossah Addo, Monique J. Brown Ph.D., Mph, Xiaoming Li, Oluwafemi Adeagbo

Faculty Publications

Background: HIV continues to be an important public health concern in South Carolina (SC). However, an examination of providers’ willingness to use mHealth technologies to address ongoing barriers to HIV care and prevention strategies, particularly among men who have sex with men (MSM) is currently lacking in SC. We therefore explored HIV care providers’ perceptions of HIV testing and treatment uptake among MSM, and providers’ willingness to use mHealth technology to address barriers to HIV testing and treatment in SC. Methods: Between August and December 2021, we conducted semistructured virtual interviews with 10 HIV care providers recruited purposively based on …

Sars-Cov-2 Detection And Persistence In A Remote Amazonian Settlement, Glauco M. Silva, Roberto C. Ilacqua, Franciely G. Gonçalves, Carla M. Santana, Felipe T. Jordão, Paula R. Prist, Melissa S. Nolan Ph.D., Mph, Andreia F. Brilhante, Marcia A. Sperança, Gabriel Z. Laporta

Faculty Publications

Background: COVID-19 continues to pose a major global health challenge. Despite its geographic distance from Brazil’s major urban centers, Acre state has experienced notable outbreaks. This study assessed the detection and persistence of SARS-CoV-2 in the rural settlement of Santa Luzia, located in the remote municipality of Cruzeiro do Sul, Acre state, Brazil. Methods: In July 2022, a cross-sectional survey was conducted at 40 sites from an ongoing environmental study, selected by deforestation patterns and proximity to health posts. Saliva samples were collected from residents aged 5–90 years, followed by nucleic acid extraction and multiplex RT-qPCR for SARS-CoV-2 detection. Results: …

Co-Parents With Benefits, Jessica Feinberg

Faculty Publications

The relationshipbetween individuals who share a common child merits significant legal and societal attention. An increasingly high percentageofchildren are being raisedby parents who are not married to each other, and modern social science research demonstrates that the quality of the relationship between co-parents has serious implications for children's well-being. When co-parentage is unaccompanied by marriage, however, the law historically has attachedfew, if any, rights and obligations to the relationship. This historical disregard for the relationship between non-marital co- parents fails to promote children's best interests. Children whose parents are not marriedto each other should not be excludedfrom the benefits that …

If The Body Keeps The Score, What Happens When You Bring The Body To Work? Exploring The Health Effects Of Trauma On Human Capital, Lisa Jones Christensen, Elizabeth Embry, Arielle Badger Newman, Paul C. Godfrey

Faculty Publications

Data reveal that the physical effects of trauma exposure increasingly surface in business, social, and other settings. Exposure to trauma at any point in life can cause employee health concerns, yet many firms do not acknowledge or address this. Herein, we combine trauma theory with human capital theory to explain how manifestations of trauma exposure—hyperarousal, intrusion, and constriction—impact employee health and performance. This article outlines how each manifestation affects human capital deployment, and thus employee performance. It further demonstrates how these human capital deployment issues have individual- and unit-level performance implications. This article offers a theory linking health effects of …

The Marginal Value Of Public Pension Wealth: Evidence From Border House Prices, Darren Aiello, Asaf Bernstein, Mahyar Kargar, Ryan Lewis, Michael Schwert

Faculty Publications

We study how state pension windfalls affect property prices near state borders, where theory suggests real estate reflects the value of additional public resources. Windfalls, representing a source of state revenue about half the size of total taxes, provide economically significant and plausibly exogenous variation in fiscal conditions. We find that each dollar of pension asset returns increases border house prices by approximately two dollars, suggesting that governments allocate additional funds towards high-value projects or tax abatement rather than wasting incremental resources. Evidence of larger effects in financially constrained municipalities highlights how fiscal resources amplify welfare effects of economic shocks.

Understanding The Mechanisms Of Interpretative Change, Aaron-Andrew P. Bruhl

Faculty Publications

Interpretive methodology changes over time, and we appear to be in a period of particular ferment. In federal statutory interpretation, which is the focus of this Article, several important changes in interpretive methods have occurred in recent decades or are underway. There has been a gradual, decades-long shift away from intentionalist tools like legislative history. In addition, as the culmination of a series of smaller steps, the Supreme Court has just reshaped the doctrine governing deference to agency interpretations, a move that will require years of further clarification. And, although this shift is still taking shape, it appears that some …

Mired In Meyer'S Mischief A Century After Fabrication Of Constitutional Parents' Rights, James G. Dwyer

Faculty Publications

The seminal Supreme Court decisions Meyer v. Nebraska and Pierce v. Society of Sisters, now commemorated on their centenary anniversary, are odd doctrinal ducks. They are both still routinely cited as the foundation for ascribing to persons on whom the state has conferred legal parent status a right under the Fourteenth Amendment Due Process Clause of the United States Constitution. (According to Westlaw, judicial citation count for Meyer now nears 3000, and secondary-source citations have surpassed 7000.) It is a constitutional right to force states to confer on them greater legal power than the state is otherwise inclined to …

Preserving The Future Of Juries And Jury Trials, Paula Hannaford-Agor

Faculty Publications

Amid rapid technological and social change, a new initiative explores how judges, court staff, trial lawyers, and other justice system stakeholders can preserve juries and jury trials, strengthen public trust, and remain a pillar of democracy.

In 2024, the National Center for State Courts (NCSC) launched Preserving the Future of Juries and Jury Trials, a project that built on Just Horizons’ methodological foundation of strategic foresight and its premise that data-driven public services and sociopolitical discord have the greatest potential impact on court operations. For this project, NCSC imagined how these trends would affect juries and jury trials in each …

In Through The Side Door: Anti-Asian Nativism, U.S. Immigration, And Foreign Policy—A Legal History And Case Study, Deenesh Sohoni, Vivian E. Hamilton, Chinua Thelwell

Faculty Publications

The 19th- and early 20th-centuries were marked by pervasive anti-Asian sentiment, and antipathy towards people of color more generally. Giving legal effect to the anti-Asian nativism prevalent at the time, U.S. policies prohibited most Asian immigration and naturalization. In particular, immigration laws sought to exclude Asian laborers and working-class immigrants from entry. During the same period, however, the federal government determined that other Asian visitors—especially Chinese government officials, merchants, religious leaders, and students—could be useful in advancing U.S. political and economic interests abroad. Thus, in marked contrast to its inhospitable treatment of their working-class counterparts, U.S. policy facilitated the entry …

Patent Law: An Open-Access Casebook, Sarah Fackrell, Sarah R. Wasserman Rajec, Andres Sawicki

Faculty Publications

No abstract provided.