Digital Commons Network^™

The Mediating Effect Of Injury On The Relationship Between Running Mileage And Depressive Symptoms In Division 2 Cross Country Athletes, Jaxon Leduc

Cal Poly Humboldt theses and projects

Training for a cross-country season requires athletes to accumulate a high volume of training miles at different intensities. Over a period of months and years, consistent high training volumes have been shown to contribute to overuse injuries in cross country athletes. Injuries have been shown to negatively impact athlete’s mental health; this is especially true in student athletes. The purpose of this research is to explore the mediating effect of injuries on the relationship between training volume and mental health in collegiate cross-country runners. Participants in this study were 40 members of NCAA Division 2 Cross Country teams with eligibility …

Student Housing Insecurity And Its Impacts On Academic Enthusiasm: A Multi-Method Analysis Of Cal Poly Humboldt, Aaron Gabriel Perez

Cal Poly Humboldt theses and projects

Cal Poly Humboldt has faced major challenges in the realm of housing due to a long history of shortages and difficulties in prioritizing the distribution of housing amongst the student population. Recent issues such as the mold infestations in Fall 2024 bring this into focus as the campus is also trying to expand its available housing through constructing new housing facilities. This in conjunction with the campus’ desire to continually increase its student population base year by year brings into question the fundamental goals of the campus and whether or not students feel the campus is helping or hurting them. …

The Effects Of Anxiety On Rock Climbing Performance In A Competition Setting, Jackson W. Miller

Cal Poly Humboldt theses and projects

The purpose of this study was to examine how anxiety affects rock climbing performance in a simulated competition setting. Anxiety is known to influence motor performance in athletic environments, often impairing fine motor coordination, decision-making, and movement efficiency. This research aimed to explore whether elevated competitive pressure would alter climb time, move count, and total mistakes made during bouldering performance. Fifteen intermediate climbers (V5 level) were recruited and completed three separate trials of the same route under varying conditions: (1) a control climb, (2) a self-competition trial where participants attempted to beat their own baseline time, and (3) a head-to-head …

Examining The Effects Of A Teaching Theory Of Mind Curriculum For Children With Autism Spectrum Disorder, Kayla Marie Hart

Cal Poly Humboldt theses and projects

Theory of Mind (ToM) is the ability to attribute mental states – thoughts, beliefs, and emotions – to oneself and others, and is critical for social understanding and interaction. Research has demonstrated that ToM development is linked to social competence, peer relationships, and emotional development in children, with notable differences observed between children with Autism Spectrum Disorder (ASD) and neurotypical peers. This study aims to examine the effectiveness of the Teaching Theory of Mind Curriculum (Ordetx, 2012) curriculum in improving ToM capabilities and social functioning in children with ASD and attention-deficit/hyperactivity disorder (ADHD). Participants, aged 7-17, underwent a 6-12 week …

Cultivation Of Winged Kelp (Alaria Marginata) In Humboldt Bay, Evan C. Simpson

Cal Poly Humboldt theses and projects

The cultivation potential of the winged kelp (Alaria marginata) was evaluated in Humboldt Bay, California, to further develop sustainable aquaculture in the region. Seasonality, depth, and system design were evaluated in regard to harvest biomass and quality. Results suggested that single-longline configurations at shallow depths (< 2 m) produced greater total biomass than a multi-longline system, suggesting enhanced water flow and reduced self-shading improved growth. Kelp grew best with a winter outplanting period (December-April), most likely due to environmental conditions (e.g., temperature, nutrients, and salinity) being within the kelp’s tolerable range, with as much as 2.24 kg/meter of kelp being harvested. These findings demonstrate that while the estuarine system has more variable conditions than predicted, A. marginata can be successfully cultivated in Humboldt Bay and highlight its potential as a viable crop for northern California’s emerging seaweed industry. Future work targeting the optimization of single-longline design and deployment timing may further improve yield and support regional goals for sustainable aquaculture and food security.

A Comparative Analysis Of Perineuronal Nets In Trout And Zebrafish Models, Adnan Alyan

Cal Poly Humboldt theses and projects

Perineuronal nets (PNNs) are specialized extracellular matrix structures that surround certain types of neurons in the central nervous system. Research from the past few decades has cemented PNNs as an integral player in the closure and onset of critical periods, memory modulation, and neural plasticity. These effects are thought to occur when PNNs form around a neuron and structurally stabilize its synaptic connections. PNNs have been directly linked to behavioral changes, making them of interest to psychologists as well as neuroscientists. Several PNN components, such as Hapln1 and aggrecan such as have been found in zebrafish, a teleost fish (Kang …

Disclosure Benchmarking By Lawyers: Evidence Fromthe Ipo Setting, Michael S. Drake, Jeff Mcmullin, Kenneth Merkley, Chase Potter, John Treu

Faculty Publications

Lawyers play an important advisory role in drafting financial reports, yet empirical evidence documenting the influence of external legal counsel on this process remains sparse. This study focuses on a specific aspect of lawyers’ drafting process: the practice of reviewing disclosures previously filed by other issuers—a practice termed “disclosure benchmarking.” Using initial public offering (IPO) disclosures as the setting, we find that disclosure benchmarking is associated with amore efficient Securities and Exchange Commission (SEC) review process. We further find that it is associated with several measures of disclosure quality, including disclosures that are less likely to be revised in subsequent …

The Influence Of Financial Data Subscriptions On Analyst Research, Braiden Coleman, Travis Dyer, Mark Lang

Faculty Publications

We use disclosed “source” data from analyst reports to infer brokerage financial data subscriptions (FDS) and investigate their effects on analyst research. When brokerages add FDS, their analysts’ forecast accuracy increases. Effect sizes are at least as large as those for analyst experience, busyness, and brokerage size. Benefits are largest for less experienced and busier analysts with less private access to management forecasting over longer horizons. Although adding new FDS benefits individual analysts, there is substantial overlap in FDS across brokerages, leading to homogenized market views. Specifically, when brokerages have overlapping FDS, their analysts’ forecasts, timing, boldness, recommendations, report content, …

Signaling Innovation: The Nontax Benefits Of Claiming R&D Tax Credits, Bradford F. Hepfer, Hannah W. Judd, Sarah C. Rice

Faculty Publications

Using the IPO setting, we test whether firms signal the quality of their investments in innovation activities by claiming R&D tax credits. We find the presence and amount of the R&D credit are each associated with lower information asymmetry and with higher investor demand at IPO. Conservatively, we estimate that sample firms realize additional IPO proceeds of 32–45 percent of their creditable R&D expenditures, indicating economically significant non-tax benefits associated with the R&D credit. We verify the R&D credit signal by showing its positive association with firms’ future patenting activity, patent citations, and post-IPO stock returns. Results from these tests …

The Future Performance Implications Of Non-Gaap Motivated Investment, Minkwan Ahn, Theodore E. Christensen, Ryan G. Johnson, Melissa F. Lewis-Western

Faculty Publications

We investigate whether consistent non-GAAP reporting is associated with investment efficiency. Prior research finds a positive association between non-GAAP reporting and investment levels, concluding that it represents overinvestment. We corroborate this positive association, but additional tests are not consistent with the conclusion of inefficient overinvestment. Specifically, we explore the relation between investment and future cash flows as a proxy for the realization of investments in positive net present value projects. We find that the investments of firms that consistently report non-GAAP metrics are associated with similar or higher future cash flows than the investments of firms reporting only GAAP earnings, …

A Generalized Coherence Framework For Quantifying Input Contributions In Multi-Input Systems With Correlated Or Uncorrelated Inputs, Nolan H. Howes, Matthew S. Allen, Dario Farina, Steven Knight Charles

Faculty Publications

In multi-input systems, it is often necessary to quantify the contribution of each input to an output. Such contribution analysis is frequently performed using coherence. However, when correlation is present between inputs, existing coherence measures do not accurately quantify the contribution of individual inputs, except in special cases. Here we propose an expanded coherence framework that enables contribution analysis in any multi-input system, regardless of input correlation. We bridged the gap by defining three new coherence measures: component, excluded, and isolated coherence. Component coherence is an intermediate measure that decomposes measured output power into components attributable to inputs directly vs …

Comparing The Sensitivity And Specificity Of Novel Motor Assessments For Traumatic Brain Injury, Paula K. Johnson, Ariana M. Hedges-Muncy, Erin D. Bigler, Lorie Richards, Steven Knight Charles

Faculty Publications

Background: Portable technology that records movements with high accuracy provides potential for sensitive clinical movement tests for individuals who experienced a traumatic brain injury (TBI). Objective: (1)To present impairments assessed using markerless motion capture (MMC) and (2) to compare the sensitivity and specificity of the MMCmediated tests to each other and to common clinical tests. Design: Screening study, using as criterion standard the ability to classify participant with TBI versus control participant. Setting: Research laboratory. Participants: The study included 30 individuals with TBI and 101 control participants. Entry criteria included most recent head injury < 5 years old, no history of movement issues prior to injury, no movement-affecting medications, and sufficient cognitive ability to follow instructions. Interventions: Not applicable. Main Outcome Measures: Performance on MMC-mediated tests and existing clinical analogs. MMC-mediated tests included finger oscillation, simple reaction time, and visually guided movement tasks. For comparison, participants also completed the following clinical tests: Halstead–Reitan finger tapping, simple reaction time test, and Beery Visuomotor Integration test. Impairments were identified as test scores of participants with TBI that fell outside of the 95% interval of control participants’ test scores. Random forest analysis was used to calculate the sensitivity and specificity of MMC and clinical tests according to their ability to correctly classify participants with TBI and control participants. Results: MMC-mediated tests revealed impairments in more participants with TBI than clinical tests in all three TBI groups (mild, repeated, and moderate to severe). Similarly, MMC-mediated tests revealed a higher percentage of scores as impairments than clinical tests in all three groups with TBI. Furthermore, MMC-mediated tests proved more sensitive and more specific than clinical tests (70% versus 50% and 98% versus 93%, respectively). Conclusion: MMC-mediated tests are sensitive and specific (compared to traditional clinical tests) and have potential to fill a gap in clinical care of TBI.

Dictyostelids: The Second Major Group Of Slime Molds, P. Liu, Z.J. Zhang, J.H. Ge, Y. Zou, Z. Li, S. Li, Y. Li, S.L. Stephenson

Biological Sciences Faculty Publications and Presentations

The dictyostelids (also called cellular slime molds or social amoebae) are among the more abundant and widespread groups of microorganisms in terrestrial ecosystems. Despite this fact, they are totally unknown to most people, who sometimes confuse the dictyostelids with myxomycetes (or plasmodial slime molds). The first dictyostelid (Dictyostelium mucoroides) was described by the German Oskar Brefeld in 1869. More than 180 species are now known, and these organisms have been recorded from the high arctic to the subantarctic. The primary microhabitat for dictyostelids is the soil/humus layer on a forest floor, but they also occur in a number of other …

The Impact Of Covid-19 Pandemic On Economic Convergence Between Developed And Developing Nations, Lucile Sabas, Williams Kwasi Peprah [email protected], Carmelita Troy, Quentin Sahly

Faculty Publications

This study investigates convergence between developed and developing countries’ GDP during the pre-COVID-19 era (1960-2019) and post-COVID-19 era (2020-2023) using World Bank data and the Augmented Dickey-Fuller (ADF) test. For the pre-COVID period, results show no significant convergence, with an ADF statistic of −1.78 and a P = 0.39, likely due to disparities in industrialization and governance. Similarly, post-COVID results (ADF statistic −1.2, P = 0.67) also suggest no convergence, possibly exacerbated by pandemic-related challenges. The study highlights that structural barriers and the pandemic have hindered economic convergence.

“Were The Creation Days Twenty-Four-Hour Days Or Indefinite Periods Of Time?”, Jiri Moskala

Faculty Publications

No abstract provided.

Actuator Disk Model For Aeropropulsive Coupling Effects In Vortex Particle Method, Eduardo Alvarez, Vineet Ahuja, Vinod Lakshminarayan, Aaron Perry, Ryan Anderson, Andrew Ning

Faculty Publications

Blown lift and distributed electric propulsion aircraft pose strong aeropropulsive coupling effects that cannot be ignored during the early stages of design. In this study, we develop an advanced actuator disk model (ADM) for aeropropulsive coupling effects of ducted fans with the vortex particle method (VPM). The advanced ADM consists of (1) an actuator disk at the rotor plane, (2) a surface vortex sheet modeling the mixing and convection of blade tip vorticity along walls, and (3) a powered wake at the exhaust. With these three components, a propulsion jet with an arbitrary velocity profile is formed and interactions with …

Designing For Relational Ethics In Online And Blended Learning: Levinas, Buber, And Teaching Interfaith Ethics, Michael Hubbard Mackay, Jason K. Mcdonald, Andrew C. Reed

Faculty Publications

Online and blended learning (OBL) overemphasize the process of creating artifacts, producing strategies, or otherwise utilizing a “making” orientation in education. As an alternative to this making-orientation, we offer a model for relational course design founded in the philosophies of Emmanuel Levinas and Martin Buber. We examine an OBL course design focused on interfaith leadership and ethics that lends itself to the need for relational pedagogy. The focus on asymmetrical and symmetrical relationships that separate Levinas and Buber’s philosophies enable rich ways of designing relational pedagogies and for resisting the making orientation. By focusing on human relationships, we demonstrate design …

Creating And Implementing An Inclusive Metadata Policy, Nicole Lewis, Jeremy Myntti

Faculty Publications

The BYU Library developed an Inclusive Metadata Policy for metadata creators to use when creating and remediating descriptions to be more inclusive. Accompanying the policy is a companion document with recommendations and examples, including links to many external resources. In addition to working with stakeholders in the library to develop the policy, we consulted with the University’s Office of Belonging. This presentation will describe the process we used to create the library policy and recommendations document and share information about how the policy has been implemented.

Rice Plants Response To Modulation Of The Erecta Signaling, Yasmin Vasques Berchembrock, Flavia Barbos Silva Botelho, Bhuvan Pathak, Shan Zhao, Vibha Srivastava

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

The ERECTA family of receptors (ERfs), encoding leucine-rich repeat receptor-like kinases (LRR-RLKs), can regulate multiple aspects of plant development and abiotic stress responses. The rice (Oryza sativa) genome contains three ERfs, namely ERECTA 1 (OsER1), ERECTA 2 (OsER2), and ERECTA-LIKE (OsERL). However, there is limited information currently available on their expression pattern during the plant developmental stages. The expression pattern of OsERfs genes at reproductive stages from the booting (R2) to milk (R6) stage in Nipponbare cultivar and the transgenic plants expressing a truncated Arabidopsis ERECTA (ER) lacking the kinase domain (triangle Kinase) were studied. The triangle Kinase functions as …

Fear Of Balancing, William Baude

Public Law and Legal Theory Working Papers

As a new Supreme Court majority settles into a new era of constitutional adjudication, the Justices will confront important methodological questions. How are they to go about interpreting the Constitution? In the Second Amendment case of United States v. Rahimi,1 many of the Justices wrote separately to debate broader methodological questions about constitutional interpretation. They expressed a shared desire to turn away from judicial “balancing” of interests in adjudicating constitutional rights in favor of founding-era understandings. That is a healthy instinct, but founding-era understandings may in truth lead to balancing, so maintaining an originalist approach and an opposition to balancing …

Do Constitutional Unamendability Rules Make A Difference?, Adam Chilton, Mila Vertseeg

Public Law and Legal Theory Working Papers

Leaders often try to amend constitutions to remove checks on their powers. To help protect against such democratic erosion, constitutional drafters and jurists sometimes restrict constitutional amendments by: (1) specifying in the constitutional text that certain clauses or principles can never be changed (“Eternity Clauses”); (2) granting apex courts the power to review the procedural validity of amendment processes (“Amendment Review”); or (3) developing judicial doctrines that block amendments that change the constitution’s nature (“Unamendability Doctrines”). But are unamendability rules actually associated with differences in countries’ levels of democracy? We argue that Eternity Clauses are likely to emerge in conditions …

Remedies In The Officer Removal Cases, Samuel L. Bray

Public Law and Legal Theory Working Papers

When an officer challenges her removal by the president, what relief is available? This Article shows that the appropriate remedy will typically be a declaratory judgment. The interim relief question is harder. The suggestion here is that if an officer sues immediately to challenge her removal, there should be a presumption that the federal courts will prevent her removal during the pendency of the litigation. Otherwise, the presumption should be against interim relief. This approach is grounded in the principles of equity, and it prevents “flipping” back and forth in who occupies the office during the litigation.

Stubhub For Courts? Technology, Markets, And New Solutions To Court Congestion, Ronen Avraham, William H. J. Hubbard

Public Law and Legal Theory Working Papers

Rescheduling of court hearings is ubiquitous but virtually ignored by academic scholarship. This is so, despite its contributions to court congestion, a perennial problem for courts that has been the subject of repeated, and repeatedly unsuccessful, efforts at reform. In this Article, we aim to show that rescheduling merits scholarly attention, and by diagnosing why and how it contributes to court congestion and delay, we both explain why most efforts at reducing delay fail and identify new possibilities for speeding up dockets. We draw inspiration from online platforms such as StubHub and SpareFare, technologies that have facilitated rescheduling through easy-to-use …

Comparative Effectiveness Of Conservative Versus Early Surgical Treatments On Wound Healing Outcomes Of Diabetic Foot Ulcers: A Literature Review, Paul Tran, Yasim Zafar, Andrea Piña, Stephanie N. Campbell

School of Podiatric Medicine Publications

Diabetic foot ulcers (DFUs) are a severe complication of diabetes mellitus and the leading cause of lower extremity amputations worldwide. Peripheral neuropathy and peripheral arterial disease secondary to complications of diabetes mellitus may result in ulcers going unnoticed, increasing the risk of severe osteomyelitis, necrotizing infection, hospitalization, amputation, and sepsis. While conservative management of DFUs remains the first-line approach—emphasizing wound care, infection control, glycemic management, and offloading—there is growing debate about whether delaying simple surgical interventions worsens long-term outcomes. Surgeries such as tenotomy, digital amputation, and tendo-Achilles lengthening are minimally invasive options that can correct deformities, prevent recurrence, and promote …

Demographic And Clinical Characteristics Of Patients With Charcot Neuro-Osteoarthropathy In People With Diabetes Mellitus In Six Countries: A Multicenter Observational Study From 1996 To 2022, E. B. Jude, C. Siafarikas, A. Rastogi, R. Bem, T. Tankova, M. -F. Kong, Javier La Fontaine, J. Pappachan, N. Tentolouris

School of Podiatric Medicine Publications

Aim: To describe the demographic and clinical characteristics of patients with Charcot neuro-osteoarthropathy (CNO) and to examine for differences between participants with Type 1 diabetes mellitus (DM) (T1DM) and Type 2 diabetes mellitus (T2DM).

Materials and Methods: Multicenter observational study in eight diabetic foot clinics in six countries between January 1, 1996, and December 31, 2022. Demographic, clinical, and laboratory parameters were obtained from the medical records. Analyses were performed using parametric or nonparametric statistical tests for variables with normally or nonnormally distributed values, respectively. Comparisons of the qualitative data were performed using the chi-square test.

Results: Seven hundred seventy-four …

Turbo Fladry Fencing To Mitigate Short-Term Agricultural Damage Caused By Wild Pigs, Michael P. Glow, Jesse A. Tussing, Johnathan G. Walls, Robert B. Hyle, Joseph M. Halseth, Nathan P. Snow, Kurt C. Vercauteren

Human–Wildlife Interactions

Wild pigs (Sus scrofa) are a destructive invasive species that damage agricultural crops in many regions of the world. Lethal techniques to reduce populations are most often used to mitigate damage, but additional techniques are also needed in conjunction with lethal tools to protect resources in some settings (e.g., where lethal control is not practical or possible to achieve population elimination). While additional tools such as deterrents or temporary fencing may provide short-term relief, few effective options are currently available because habituation by wild pigs often reduces long-term effectiveness. Turbo fladry, a type of electric fence, is an …

Heart Rate Variability And Personality Traits As Predictors Of Arabic Language Proficiency And Gains During Study Abroad In Jordan, Kirk Belnap, Dan P. Dewey, Patrick Steffan, Annika Barrick Bickmore, Khalil Yousef

Faculty Publications

High stress predicts mood and anxiety disorders and can necessitate clinical intervention (Steffen et al., 2014). Language learners often experience high stress during intensive study abroad (SA) programs (Dewey et al., 2018), which can hinder communication (Buttaro, 2004; Peck, 1974). Acculturative stress is common among second language (L2) speakers and can coincide with stress related to the inability to communicate one’s thoughts and ideas (Savicki, 2010), further complicating communication. Therefore, reducing stress in immersive settings can be crucial due to the link between stress, L2 use, and psychological wellbeing (Dewaele & Dewaele, 2021). We report an exploratory investigation of the …

Origami Folding Pattern Development For Gossamer 18 Structures, Larry L. Howell, Ivy Running, Carolina Wright, Robert J. Lang, Spencer Magleby

Faculty Publications

Gossamer structures for satellites are large, thin deployable structures that are attractive for space applications because they can be stowed compactly for transportation and deployed to have large functional surface areas. Reflectarray antennas, in particular, are candidates for gossamer structures because they can be realized on thin membranes. However, the efficiency of reflectarray antennas decreases with any deviations from a flat plane, including those induced by plastically deformed creases. Rolling membranes can prevent some plastic deformation, but requires relative slipping between layers that are rolled together. In this work, we describe, analyze, and demonstrate two rolled configurations for deployable gossamer …

Internally Stowed, Radially Deployed Radiator Panels For Passive Cubesat Thermal Control, Josh R. Cannon, Kyle N. Havey, Noah S. Housley, Rydge B. Mulford, Brian D. Iverson

Faculty Publications

CubeSats experience significant thermal loads due to solar irradiation and the dissipation from electrical components. The high heat dissipation per unit volume can lead to mission failure if not properly managed. Deployable radiators that are externally stowed and passively actuated in response to changes in CubeSat temperature have been explored as a viable solution. This work describes a radially deployed fin array that is stowed within the CubeSat body when the required heat dissipation is low and passively deploys when the required heat dissipation is high. Internal stowage improves thermal transport to the deployable fins and minimizes heat loss when …

Drop Dynamics During Condensation On Superhydrophobic Surfaces In Vapor Shear Flow, Shaur Humayun, R. Daniel Maynes, Julie Crockett, Brian D. Iverson

Faculty Publications

Accurate models for predicting drop dynamics, such as maximum drop departure sizes, are crucial for estimating heat transfer rates during condensation on superhydrophobic (SH) surfaces. Previous studies have focused on examining the heat transfer rates for SH surfaces under the influence of gravity or vapor flowing over the surface. This study investigates the impact of surface solid fraction and texture scale on drop mobility in a condensing environment with a humid air flow. Experiments recorded condensation with varying surface feature sizes from micro- to nano scale under different flow rates. Video analysis detected the drop-size distribution and maximum drop departure …