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Aerostructural Predictions Combining Fenics And A Viscous Vortex Particle Method, Ryan Anderson, Andrew Ning, Ru Xiang, Sebastiaan P. C. Van Schie, Mark Sperry, Darshan Sarojini, David Kamensky, John T. Hwang Jan 2023

Aerostructural Predictions Combining Fenics And A Viscous Vortex Particle Method, Ryan Anderson, Andrew Ning, Ru Xiang, Sebastiaan P. C. Van Schie, Mark Sperry, Darshan Sarojini, David Kamensky, John T. Hwang

Faculty Publications

Electric Vertical Takeoff and Landing (eVTOL) aircraft experience complex, unsteady aerodynamic interactions between rotors, wings, and fuselage that can make design difficult. We introduce a new framework for predicting aerostructural interactions. Specifically, we demonstrate the coupling of a finite element solver with Reissner-Mindlin shell theory for computing deflections and a viscous vortex particle for capturing wakes. We perform convergence studies of the aerodynamics and the coupled aerostructural model. Finally, we share some preliminary results of the dynamic aeroelastic response of Uber’s eCRM-002 main wing, and share some qualitative observations.

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Understanding The Role Of Online Teaching Assistants In Student Engagement, Sara H. Tuiloma, Charles R. Graham Jan 2023

Understanding The Role Of Online Teaching Assistants In Student Engagement, Sara H. Tuiloma, Charles R. Graham

Faculty Publications

In this paper, we examine how online teaching assistants (OLTAs) interact with students in terms of affective, behavioral, and cognitive support and the influence of OLTA training on these interactions. Through a thematic network analysis, using a tracking instrument and semi-structured interviews with 10 OLTAs, we examined how online university students are supported based on the quantity and quality of interactions with OLTAs, and how training contributes to interactions. Our research addressed two key questions: (1) How do OLTAs support learners in the quantity and quality of interactions? and (2) How does OLTA training around affective and behavioral support influence …

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Balancing Loyalties: A Behavioral Study On How The Quality Of Supervisor-Subordinate Relationships Affects Whistleblowing Intentions, Jace B. Garrett, Douglas F. Prawitt, Kyle Sopp Jan 2023

Balancing Loyalties: A Behavioral Study On How The Quality Of Supervisor-Subordinate Relationships Affects Whistleblowing Intentions, Jace B. Garrett, Douglas F. Prawitt, Kyle Sopp

Faculty Publications

While high-quality relationships among employees yield many benefits to organizations, they may have unintended consequences for whistleblowing. In a first experiment, we investigate whether high-quality employee-supervisor relationships reduce employees’ willingness to report supervisor wrongdoing through an internal hotline. We also investigate whether the quality of such relationships mitigates the effect of evidence strength on reporting intention. In a second experiment, we test the robustness of the effects of relationship quality and evidence strength on employees’ willingness to report wrongdoing identified in our first experiment, but to an external auditor. We also examine two factors that may mitigate the negative effect …

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The Pure Language Project, Dan Belnap, Michael Mackay Jan 2023

The Pure Language Project, Dan Belnap, Michael Mackay

Faculty Publications

In the summer of 1835, Joseph Smith and his associates purchased four mummies and some papyri scrolls from Michael Chandler.1 That summer Joseph would participate in a project that would produce a fascinating set of texts, referred to today as the Egyptian Language Documents (ELD), used and compiled mostly in Kirtland, but also consulted and expanded in Nauvoo.2 These documents, which include three incomplete variants of what was called an “alphabet” as well as an incomplete “grammar,” integrated a series of characters with explanations.

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The Sabbath In The Old Testament, Dana M. Pike Jan 2023

The Sabbath In The Old Testament, Dana M. Pike

Faculty Publications

The scriptures consistently depict the significance of sacred space and sacred time in the lives of the Lord’s covenant people. Sacred time is still experienced today, as in the past, through commemorations and celebrations on specific days that are dedicated to God and thus regarded as holy. These days punctuate the passing of ordinary or common time and are intended to help bring focus and clarity to relationships with the divine.

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Teaching Non-Native Sound Contrasts Using Visual Biofeedback, Shawn L. Nissen Jan 2023

Teaching Non-Native Sound Contrasts Using Visual Biofeedback, Shawn L. Nissen

Faculty Publications

This demonstration will explain how non-native sound contrasts can be taught to second language (L2) learners using real-time visual biofeedback through an electropalatographic (EPG) sensor. How the EPG sensor is created from a dental mold and is subsequently produced will be shown during the presentation. An explanation of how a student can visualize the contact patterns of their speech and how a tutor might use the various features of the associated software to customize the instruction to an individual speaker will be illustrated during the presentation. Possible limitations, costs, and drawbacks to using the technology will also be discussed.

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Low-Fidelity Design Optimization And Parameter Sensitivity Analysis Of Tilt-Rotor Evtol Electric Propulsion Systems, Tyler Critchfield, Andrew Ning Jan 2023

Low-Fidelity Design Optimization And Parameter Sensitivity Analysis Of Tilt-Rotor Evtol Electric Propulsion Systems, Tyler Critchfield, Andrew Ning

Faculty Publications

Urban air mobility requires a multidisciplinary approach to tackle the important chal- lenges facing the design of these aircraft. This work uses low-to-mid fidelity tools to model rotor aerodynamics, blade structures, vehicle aerodynamics, and electric propulsion for a tilt-rotor electric vertical takeoff and landing (eVTOL) aircraft. We use gradient-based design optimization and extensive parameter sensitivity analysis to explore the design space and complex tradeoffs of tilt-rotor distributed electric propulsion systems.

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Sparsity For Gradient-Based Optimization Of Wind Farm Layouts, Benjamin T. Varela, Andrew Ning Jan 2023

Sparsity For Gradient-Based Optimization Of Wind Farm Layouts, Benjamin T. Varela, Andrew Ning

Faculty Publications

Optimizing wind farm layouts is an important step in designing an efficient wind farm. Optimizing wind farm layouts is also a difficult task due to computation times increasing with the number of turbines present in the farm. The most computationally expensive part of gradient- based optimization is calculating the gradient. In order to reduce the expense of gradient calculation, we performed a study on the use of sparsity in wind farm layout optimization. This paper presents the findings of the sparsity study and provides a method to use sparsity in wind farm layout optimization. We tested this sparsity method by …

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Isogeometric Boundary-Conforming Body-In-White Crash Model Construction, Analysis, And Comparison With Fem Model, Kendrick M. Shepherd Jan 2023

Isogeometric Boundary-Conforming Body-In-White Crash Model Construction, Analysis, And Comparison With Fem Model, Kendrick M. Shepherd

Faculty Publications

In this paper, we discuss model generation to rebuild the body-in-white of a 1996 Dodge Neon finite element model into a isogeometric conforming analysis-suitable crash model. We then perform the first known boundary-fit isogeometric body-in-white crash analysis of the vehicle and compare results achieved by traditional finite element methods. Results indicate the value and potential of high-order meshes in analysis.

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Ecological-Niche Modeling Reveals Current Opportunities For Agave Dryland Farming In Sonora, Mexico And Arizona, Usa, Hector G. Ortiz-Cano, Robert Hadfield, Teresa Gomez, Kevin Hultine, Ricardo Mata-Gonzalez, Steven L. Petersen, Neil C. Hansen, Michael T. Searcy, Jason Stetler, Teodoro Cervantes-Mendivil, David Burchfield, Pilman Park, J. Ryan Stewart Jan 2023

Ecological-Niche Modeling Reveals Current Opportunities For Agave Dryland Farming In Sonora, Mexico And Arizona, Usa, Hector G. Ortiz-Cano, Robert Hadfield, Teresa Gomez, Kevin Hultine, Ricardo Mata-Gonzalez, Steven L. Petersen, Neil C. Hansen, Michael T. Searcy, Jason Stetler, Teodoro Cervantes-Mendivil, David Burchfield, Pilman Park, J. Ryan Stewart

Faculty Publications

For centuries, humans occupying arid regions of North America have maintained an intricate relationship with Agave (Agavoideae, Asparagaceae). Today Agave cultivation, primarily for beverage production, provides an economic engine for rural communities throughout Mexico. Among known dryland-farming methods, the use of rock piles and cattle-grazed areas stand out as promising approaches for Agave cultivation. Identifying new cultivation areas to apply these approaches in Arizona, USA and Sonora, Mexico warrants a geographic assessment of areas outside the known ranges of rock piles and grasslands. The objective of this study was to predict areas for dryland-farming of Agave and develop models to …

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Front Matter Jan 2023

Front Matter

The Bridge

No abstract provided.

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Prairie Roots Run Deep: A Geologically Grounded History Of Elk Horn, Iowa, Warren Watson Jan 2023

Prairie Roots Run Deep: A Geologically Grounded History Of Elk Horn, Iowa, Warren Watson

The Bridge

Clay Township is located in the southeast corner of Shelby County, Iowa. It is made up of thirty-six one-mile square sections. The top tier of sections one through six are somewhat larger due to a surveying correction. It was one of the last townships in Shelby County to be settled. The first settlers were drawn to the northeast corner of Shelby County in the late 1840s and early 1850s. Once a Dane got a foothold in Clay Township in the 1860s, the area became populated quickly. It was eventually settled by the largest contingent of Danes in America. This is …

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Six Objects From Sned: Remembering The Past On Jens Jensen’S Childhood Farm, J.R. Christianson Jan 2023

Six Objects From Sned: Remembering The Past On Jens Jensen’S Childhood Farm, J.R. Christianson

The Bridge

When Jens Jensen was growing up in Denmark, the past was never very far away. Sometimes it was way too close, like the day one of the great events of Danish history happened right there on their family farm. Jens was only three years old, but it was not something one would forget, even at his age. The day was April 18, 1864, when one of the fiercest battles in Danish history was fought on the hillside where their farm lay. Needless to say, it tore the place apart.

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Jutland Goes Global (But Not Haywire): An Autobiographical View Of Danish Business Culture, Poul Houe Jan 2023

Jutland Goes Global (But Not Haywire): An Autobiographical View Of Danish Business Culture, Poul Houe

The Bridge

This essay—or review article, if you will—continues where my presentation at the October 2013 DAHS Conference in Des Moines, Iowa, left off.1 Much like its precursor, the present text is about innovation originating from Thy (and other regions of Jutland), but unlike the earlier piece, which dealt with three innovators ranging from the early to late nineteenth century and from spiritual to material domains of culture, the following discussion will be about more recent achievements by one individual in the late twentieth and early twenty-first centuries. Moreover, the window on Danish culture at large—its spiritual dimension and Danishness not least—that …

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Review; Cooking Danish: A Taste Of Denmark, David Hendee, Polly Hendee Jan 2023

Review; Cooking Danish: A Taste Of Denmark, David Hendee, Polly Hendee

The Bridge

More than three decades after arriving in America, Danish immigrant and chef Stig Hansen published his first and only cookbook. Cooking Danish: A Taste of Denmark was the self-proclaimed Viking Chef’s gift to his family, his adopted countrymen, and all who love cooking and eating Danish foods. Although out of print since its 2007 publication, after selling out an initial print run of 10,000 copies, the award-winning, English-language cookbook is a staple of many Danish American kitchens. It remains available through the secondhand market.

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Reduced Audit Quality Acts: A Review And Organizational Model, Troy A. Hyatt, Douglas F. Prawitt, Kyle M. Stubbs Jan 2023

Reduced Audit Quality Acts: A Review And Organizational Model, Troy A. Hyatt, Douglas F. Prawitt, Kyle M. Stubbs

Faculty Publications

With increasing regulatory focus on improving audit quality, research on drivers of audit quality remains important to academics, professionals and regulators. One compelling branch of this research focuses on auditors' intentional actions that reduce audit quality, often referred to in the literature as reduced audit quality acts (RAQAs). This paper provides a review and synthesis of the RAQA literature, including a unifying definition for RAQAs and a model for organizing past and future RAQA research. With the model, we explore antecedents to RAQAs as well as the discovery of, responses to and subsequent consequences of RAQAs. We also discuss potential …

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A Coupled Source Panel, Actuator Line, And Viscous Vortex Particle Method In An O(N) Scheme, Ryan Anderson, Andrew Ning Jan 2023

A Coupled Source Panel, Actuator Line, And Viscous Vortex Particle Method In An O(N) Scheme, Ryan Anderson, Andrew Ning

Faculty Publications

Wake interactions play a significant role in aerodynamics. However, common modeling approaches are either expensive or lack fidelity, making them unreliable or difficult to use in the design process. The vortex particle method can capture the relevant physics effectively, but imposing boundary conditions with solid surfaces in a computationally efficient way is challenging. We explore two possible methods of imposing solid surface boundary conditions of vortex particle simulations. The first, a novel variation on a pure particle approach, is easy to implement but is moderately expensive, and suffers from some numerical instability. The second, source panels accelerated with a fast …

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Perceptual Ratings Of Pronunciation For L2 Learners Of English As A Function Of Task Type, Word Position, And Listener Expertise, Shawn L. Nissen, Rachel Kemmey, K. James Hartshorn Jan 2023

Perceptual Ratings Of Pronunciation For L2 Learners Of English As A Function Of Task Type, Word Position, And Listener Expertise, Shawn L. Nissen, Rachel Kemmey, K. James Hartshorn

Faculty Publications

Abstract Second language (L2) learners of English must learn to pro-duce English phonemes, words, and sentences. These L2learners make many errors when learning English; they may change the place or manner of articulation, insert vowels, or delete consonants. Obstruent sounds, such as fricatives, affricates, and stops, can be especially difficult for L2 learners. This study analyzed native English speakers’ perception of the quality of obstruents produced by native Mandarin Chinese and Korean speakers. Target words containing obstruents had been produced in three different tasks: in a carrier phrase, in a paragraph, and in a spontaneous speechsample. Obstruents were produced in …

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Triangular Fin Array Passively Actuated By Bimetallic Coils For Cubesat Thermal Control, Josh Cannon, Rydge B. Mulford, Brian D. Iverson Jan 2023

Triangular Fin Array Passively Actuated By Bimetallic Coils For Cubesat Thermal Control, Josh Cannon, Rydge B. Mulford, Brian D. Iverson

Faculty Publications

CubeSat thermal control can be especially demanding due to volume and size constraints, high power dissipation per unit surface area, and highly variable internal and external heat loads. As such, CubeSat developers must rely on thermal control systems that meet the specific requirements of their mission and environmental conditions. Deployable radiators enable satellites to increase their radiative surface area and to reveal highly emissive surfaces during times when increased heat rejection is desired. In colder conditions, when decreased heat loss is preferable, the radiators can be stowed. Passive thermal control systems are unpowered and can increase system reliability by not …

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Evaluation Of A Complexity-Based Morphosyntactic Treatment For Children With Language Disorders Of Mixed Etiologies, Kirsten M. Russell Jan 2023

Evaluation Of A Complexity-Based Morphosyntactic Treatment For Children With Language Disorders Of Mixed Etiologies, Kirsten M. Russell

Faculty Publications

Language disorder is characterized by difficulty with the comprehension and production of different aspects of language. School-aged children with developmental language disorder (DLD) and school-aged children with Down syndrome (DS) demonstrate similar deficits in the area of morphosyntax, which often creates barriers during social interactions and for academic learning. Although affected children may receive intervention, progress can be slow. Selecting appropriate treatment targets is critical for effective intervention. Traditional approaches for selecting treatment targets are based on developmental readiness (i.e., developmental) or functional need (i.e., remedial). However, intervention utilizing targets selected by these methods produce only modest results, despite a …

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Similar Overall Expression, But Different Profiles, Of Autistic Traits, Sensory Processing, And Mental Health Between Young Adult Males And Females, Garrett Cardon Jan 2023

Similar Overall Expression, But Different Profiles, Of Autistic Traits, Sensory Processing, And Mental Health Between Young Adult Males And Females, Garrett Cardon

Faculty Publications

Recent trends suggest that autism is more common in females than traditionally held. Additionally, some argue that females express autistic traits differently than males. Dimensional views of autism could shed light on these issues, especially with regards to understudied behavioral areas, such as sensory processing. We examined autistic traits, sensory processing, anxiety, and related behaviors in a large sample of neurotypical young adult males and females (n = 1122; 556 female; ages 19–26). Participants completed an online survey containing questionnaires related to the above. Between groups statistical analyses, as well as within groups correlations and mediation analyses containing these constructs …

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Uncertainty, Sensory Processing, And Stress In Autistic Children During The Covid-19 Pandemic, Garrett Cardon, Mollie Bradley Jan 2023

Uncertainty, Sensory Processing, And Stress In Autistic Children During The Covid-19 Pandemic, Garrett Cardon, Mollie Bradley

Faculty Publications

Background: COVID-19 increased uncertainty for most and was especially disruptive to autistic people and their families, due in part to tendencies toward intolerance for uncertainty across this population. As such, COVID presented a natural experiment of uncertainty and its correlates in autism. Previous reports have shown associations between intolerance of uncertainty, sensory difficulty, and stress. Aims: We investigated changes in sensory difficulties and stress associated with COVID-related increases in uncertainty. Methods and procedures: Primary caregivers of 47 autistic children (ages 6–15) completed online surveys containing questions about demographics, experiences, and supports received during the pandemic. Additionally, caregivers filled out measures …

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Similar Overall Expression, But Different Profiles, Of Autistic Traits, Sensory Processing, And Mental Health Between Young Adult Males And Females, Garrett Cardon, Miranda Mcquarrie, Savanah Calton, Terisa P. Gabrielsen Jan 2023

Similar Overall Expression, But Different Profiles, Of Autistic Traits, Sensory Processing, And Mental Health Between Young Adult Males And Females, Garrett Cardon, Miranda Mcquarrie, Savanah Calton, Terisa P. Gabrielsen

Faculty Publications

Recent trends suggest that autism is more common in females than traditionally held. Additionally, some argue that females express autistic traits differently than males. Dimensional views of autism could shed light on these issues, especially with regards to understudied behavioral areas, such as sensory processing. We examined autistic traits, sensory processing, anxiety, and related behaviors in a large sample of neurotypical young adult males and females (n = 1122; 556 female; ages 19–26). Participants completed an online survey containing questionnaires related to the above. Between groups statistical analyses, as well as within groups correlations and mediation analyses containing these constructs …

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Effects Of Parent-Implemented Interventions On Outcomes Of Children With Autism: A Meta-Analysis, Wai Man Cheng, Timothy B. Smith, Marshall Butler, Tina Taylor, Devan Clayton Jan 2023

Effects Of Parent-Implemented Interventions On Outcomes Of Children With Autism: A Meta-Analysis, Wai Man Cheng, Timothy B. Smith, Marshall Butler, Tina Taylor, Devan Clayton

Faculty Publications

Children with autism spectrum disorder (ASD) have been shown to beneft from parent-implemented interventions (PIIs). This meta-analysis improved on prior reviews of PIIs by evaluating RCTs and multiple potential moderators, including indicators of research quality. Fifty-one efect sizes averaged moderately strong overall benefts of PIIs (g=0.553), with studies having lower risk of research bias yielding lower estimates (g=0.47). Parent and observer ratings yielded similar averaged estimates for positive behavior/social skills (g=0.603), language/communication (g=0.545), maladaptive behavior (g=0.519), and to a lesser extent, adaptive behavior/life skills (g=0.239). No other study, intervention, or participant

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Digital Learning Transformation In Higher Education: International Cases Of University Efforts To Evaluate And Improve Blended Teaching Readiness, Charles R. Graham, Ganbat Danaa, Tserenchimed Purevsuren, Adriana Martínez, Cinthia Bittencourt Spricigo, Barbara Maria Camilotti, Tserenkhand Batsukh Jan 2023

Digital Learning Transformation In Higher Education: International Cases Of University Efforts To Evaluate And Improve Blended Teaching Readiness, Charles R. Graham, Ganbat Danaa, Tserenchimed Purevsuren, Adriana Martínez, Cinthia Bittencourt Spricigo, Barbara Maria Camilotti, Tserenkhand Batsukh

Faculty Publications

The global pandemic of 2019 brought heightened awareness to institutions of higher education of the need to engage in a digital transformation that extends beyond university business operations to the pedagogy of the classroom. This paper is a case study that explores three international cases of universities in Colombia, Brazil, and Mongolia that are at different stages along the path of a digital pedagogical transformation. This article tells each story, including (1) what is driving the local need to engage in digital transformation, (2) what the major challenges and barriers are to achieving a transformation, and (3) what efforts are …

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Coaching To Support Blended Teaching: A Phenomenological Study Of The Coaching Experiences Of Emerging K–12 Blended Teacher, Michelle Jensen, Charles R. Graham Jan 2023

Coaching To Support Blended Teaching: A Phenomenological Study Of The Coaching Experiences Of Emerging K–12 Blended Teacher, Michelle Jensen, Charles R. Graham

Faculty Publications

With the growth of blended teaching comes a need to support teachers that are shifting their instruction to this mode of teaching. Coaching is a form of professional development that is growing in K–12 institutions. However, research of coaching specifically intended to support blended teaching practices is lacking. This phenomenological qualitative study seeks to contribute to the body of research by exploring the coaching experiences of four K–12 teachers from second, fifth, junior high, and high school that are new to blended teaching. Through semi-structured interviews we sought to understand how our participants were experiencing the support for blended teaching …

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An Exploration Of Institutional And Personal Barriers To Online Academic Engagement At A Brazilian University, Cinthia Bittencourt Spricigo, Bárbara Maria Camilotti, Charles R. Graham, Ruth Baptista Jan 2023

An Exploration Of Institutional And Personal Barriers To Online Academic Engagement At A Brazilian University, Cinthia Bittencourt Spricigo, Bárbara Maria Camilotti, Charles R. Graham, Ruth Baptista

Faculty Publications

The recent global pandemic has raised institutional awareness around the world concerning the importance of having high quality online learning options for students. Learner engagement is often correlated with quality outcomes such as student academic success and student satisfaction. Learner engagement is commonly thought of as having three important dimensions: affective engagement, behavioral engagement, and cognitive engagement (ACE framework). Engagement is also enabled or limited by facilitators/barriers. Three important categories of facilitators/barriers are learner characteristics, personal environment, and course environment. Elements in each of these three areas enable or are barriers to students fully engaging in a course. This research …

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Barriers And Enablers To K-12 Blended Teaching, Courtney N. Hanny, Karen T. Arnesen, Qi Guo, Jordan Hansen, Charles R. Graham Jan 2023

Barriers And Enablers To K-12 Blended Teaching, Courtney N. Hanny, Karen T. Arnesen, Qi Guo, Jordan Hansen, Charles R. Graham

Faculty Publications

The attributes of post-pandemic blended teaching (BT) will more closely resemble pre-Coronavirus conditions than the outbreak’s emergency remote teaching. Thus, barriers and enablers for teachers transitioning to BT after emergency remote teaching will be similar to those of early BT adopters. K-12 research has identified external and internal barriers and enablers to technology integration but has largely overlooked those of BT. This study involved analyzing 62 interviews of K-12 blended teachers to discover factors that enabled BT, stood as barriers to initial and continued blending efforts, and helped teachers overcome barriers. Teacher-perceived barriers included, among others, costs perceived as outweighing …

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The Audit Quality Effects Of Small Audit Firm Mergers In The United States, Brant E. Christensen, Kecia Williams Smith, Dechun Wang, Devin Williams Jan 2023

The Audit Quality Effects Of Small Audit Firm Mergers In The United States, Brant E. Christensen, Kecia Williams Smith, Dechun Wang, Devin Williams

Faculty Publications

Increased audit regulation, coupled with reports of frequent mergers among smaller audit firms, creates a dynamic environment in which to assess changes in the U.S. audit market. We examine the audit quality consequences of audit firm mergers between small audit firms that audit public clients, a topic about which little is known. Using a sample of small audit firms each involved in a single merger during 2004-2016, we find consistent evidence that post-merger audit quality decreases when PCAOB-identified audit deficiencies and audit fees are used as proxies for audit quality. In addition, we find weak evidence of lower post-merger audit …

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Does Audit Regulation Improve The Underlying Information Used By Managers? Evidence From Pcaob Inspection Access And Management Forecast Accuracy, Brant E. Christensen, Lijun (Gillian) Lei, Sydney Qing Shu, Wayne Thomas Jan 2023

Does Audit Regulation Improve The Underlying Information Used By Managers? Evidence From Pcaob Inspection Access And Management Forecast Accuracy, Brant E. Christensen, Lijun (Gillian) Lei, Sydney Qing Shu, Wayne Thomas

Faculty Publications

Survey evidence and academic research raise the possibility that audit regulation can impact not only the information contained in external financial reports but also the internal information used by management. We investigate this possibility by examining the improvement in management forecast accuracy around initiation of the Public Company Accounting Oversight Board's (PCAOB) international inspection program. Consistent with managers having improved information, we find that managers issue more accurate forecasts following PCAOB inspection access. Multiple additional analyses support that an improved information environment is the mechanism underlying our results, and this effect is distinct from, and incremental to, any effects of …

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