Digital Commons Network^™

Psychosocial, Mental, And Suboptimal Health Measures Are Not Affected By Provision Of Abdominal Aortic Calcification Imaging Results: A 12-Week Rct, Simone Radavelli-Bagatini, Lauren C. Blekkenhorst, Catherine P. Bondonno, Jack Dalla Via, Marc Sim, Abadi K. Gebre, James Dimmock, John T. Schousboe, Richard J. Woodman, Kun Zhu, Pawel Szulc, Ben Jackson, Wei Wang, Markus P. Schlaich, Douglas P. Kiel, Wai H. Lim, Amanda Devine, Moira Sim, Robin M. Daly, Jonathan M. Hodgson, Joshua R. Lewis

Research outputs 2022 to 2026

Introduction: The provision of abdominal aortic calcification imaging results can elicit cardiovascular disease risk–reducing behaviors. However, its impact on psychosocial, mental, and suboptimal health measures is less clear.

Methods: Secondary analyses of a previously reported 12-week, single-blind RCT including 240 community-dwelling older Australian males and females were conducted. Participants were provided with abdominal aortic calcification imaging results and cardiovascular disease risk–reducing educational resources (abdominal aortic calcification+education, n =121) or education alone (control+education, n =119). Psychosocial distress, mental health score, and suboptimal health status were estimated using validated questionnaires. Linear mixed models were used to compare changes between groups across 12 …

Secondary Outcomes Of The Early Collaborative Intervention Eaci On Salivary Cortisol Co Regulation In Preterm Infants And Mothers, Evalotte Mörelius, Charlotte Sahlén Helmer, Thomas Abrahamsson, Elvar Theodorsson, Ulrika Birberg Thornberg

Research outputs 2022 to 2026

The Early Collaborative Intervention (EACI) aims to strengthen early parent–infant relationships among moderate to late preterm infants in neonatal intensive care. This randomized controlled trial evaluated whether EACI influences mother–infant salivary cortisol co-regulation in mother–infant dyads, as well as infant cortisol reactivity and breast milk exposure during early infancy. Secondary outcomes were assessed in 54 dyads in the intervention group and 41 in the standard care group at one and four months’ corrected age. Salivary cortisol was collected before and after a bath at one month and a still-face procedure at four months. Significant mother–infant salivary cortisol co-regulation was observed …

Translation, Cross-Cultural Adaptation, And Psychometric Validation Of The Team Emergency Assessment Measure (Team) Into European Spanish: A Multi-Perspective Study Including Peer-Assessment, Esther Leon-Castelao, Jose Luis Medina-Moya, Alejandro Durante-Lopez, Pedro Castro-Rebollo, Simon Cooper, Antoni Ruiz-Bueno, Jordi Bañeras

Research outputs 2022 to 2026

Background: The Team Emergency Assessment Measure (TEAM) is the most widely used tool for evaluating emergency team performance, with robust psychometric evidence across multiple languages and settings. However, no European Spanish version has been validated, and no previous TEAM study has simultaneously assessed teamwork from four complementary rater perspectives: instructors from the learners’ own specialty, instructors from other specialties, self-assessment by the performing participants, and peer-assessment by observing peers. This study aimed to translate, culturally adapt, and psychometrically validate a European Spanish version of the TEAM (s-TEAM) and to evaluate its reliability and validity across these four perspectives in emergency …

Using Scoping Reviews As Precursors To Systematic Reviews: A Typology And Practical Guidance Derived From Eight Worked Examples, Hanan Khalil, Zachary Munn, Christina Godfrey, Micah D.J. Peters, Ellen Davies, Fiona Campbell, Danielle Pollock, Andrea C. Tricco, Dawid Pieper

Research outputs 2022 to 2026

Objectives: Scoping reviews are often conducted as a precursor to a systematic review (SR), yet guidance on how this relationship should be planned, executed, and reported is limited. We aimed to illustrate, through worked examples, the ways in which scoping reviews can function as precursors to SRs and to derive practical guidance for teams planning linked or sequential syntheses.

Study Design and Setting: We undertook a methodological analysis of eight contemporary evidence synthesis papers and protocols spanning veterinary medicine, animal welfare, public health, mental health, occupational health, and patient and public involvement, identified through the authors’ knowledge of the evidence …

Assessing Content Validity Of The Osteo-Taq(Aus) Using Cognitive Interviews: Cross-Jurisdictional Evidence From Uk Osteopathic Practice​​, Oliver P. Thomson, Elena Golder, Gopi Anne Mcleod, Jerry Draper-Rodi, Steven Vogel, Brett Vaughan

Research outputs 2022 to 2026

Background: The Osteopaths’ Therapeutic Approaches Questionnaire (Osteo-TAQ) has demonstrated content, construct, and face validity across multiple jurisdictions but required cognitive validation for use in the United Kingdom (UK). Objectives: To assess the cognitive content and face validity of the Australian-adapted Osteo-TAQ (Osteo-TAQ(Aus)) with practising UK osteopaths, and to determine whether any revisions were necessary. Methods: Cognitive interviews were conducted with six (n = 6) UK osteopaths using a combination of think-aloud and verbal probing techniques, informed by the Cognitive Interview Reporting Framework (CIRF). Interviews were recorded, transcribed, and analysed using team-based content analysis to identify issues of item interpretation, clarity …

Depression, Psychological Distress, And Coping Strategies Among African Migrants In Australia: A Cross-Sectional Web-Based Study, Uchechukwu Levi Osuagwu, Lillian Mwanri, Edith N. Botchway-Commey, David Chisanga, Agness Tembo, Nnaemeka Meribe, Kathomi Gatwiri, Obed Adonteng-Kissi, Kerrie P. Doyle, Frank Darkwa Baffour, Ahmed A. Moustafa

Research outputs 2022 to 2026

Background: African migrants constitute a significant proportion of the Australian population. While migration and resettlement offer opportunities, the associated stressors may adversely affect the mental health and well-being of African migrants. This study explored, for the first time, the prevalence of depression and psychological distress among African migrants in Australia and the relationship between coping mechanisms and mental health outcomes. Methods: A web-based cross-sectional survey of adult African migrants in Australia was conducted between February and May 2022. Participants (N = 167) who did not have a refugee status who resided in Australia for at least 12 months were recruited …

Do Flywheel Exercises Provide Eccentric-Overload Training?, Darjan Spudić, Kazunori Nosaka

Research outputs 2022 to 2026

Interests in eccentric resistance exercises have been increasing in both research and practice. However, implementing eccentric resistance exercise training is often challenging due to the mechanical limitations of traditional training equipment. To address this, flywheel (FW) devices emerged as a practical alternative. FW devices are commonly considered to provide eccentric-overload training, in which the load is greater in eccentric than concentric phase. However, this is not always the case. In this article, we summarize the mechanical and physiological factors influencing the effectiveness of FW devices in achieving eccentric overload. Then, we discuss a significant limitation of FW resistance exercise in …

Methylated Cfdna May Distinguish Between High- And Intermediate-Risk Uveal Melanoma: A Pilot Study, Mike Wu, Daniël P. De Bruyn, Ruben G. Boers, Aaron B. Beasley, Daan M. Hazelaar, Stavros Makrodimitris, Joachim B. Boers, Jolanda Vaarwater, Ronald O.B. De Keizer, Robert M. Verdijk, Nicole C. Naus, Dion Paridaens, Saskia M. Wilting, Elin S. Gray, Wilfred F.J. Van Ijcken, Joost Gribnau, Annelies De Klein, Erwin Brosens, Emine Kiliç

Research outputs 2022 to 2026

Background: Uveal melanoma (UM) is a highly aggressive malignancy with a metastatic risk that depends on the molecular subclass. This subclass can be determined through molecular characterization of tumor-derived tissue. With eye-sparing treatments, tumor tissue is rarely available for molecular testing. We hypothesized that minimal invasive biomarkers such as methylated cell-free DNA (cfDNA) or circulating tumor DNA (ctDNA) can be used for prognosis and monitoring of patients. Methods: Plasma cfDNA was isolated from healthy blood donors (HBDs, N = 19) and UM patients (N = 22). Plasma was collected at baseline (localized disease, N = 13) and during follow-up (metastatic …

Perspective: Improving Social Connection And Inclusion Through Equitable Digital Health Solutions, Dominika Kwasnicka, Jaimon Kelly, Eleanor Quested, Loretta Baldassar, Suzanne Robinson, Richard Sinnott, Paul O’Halloran, Anne Tiedemann, Paul Flatau, Rajna Ogrin, Jane Farmer, Abby C. King

Research outputs 2022 to 2026

In this Perspective, we address the critical intersection of digital health, social connection, and health equity. Taking an interdisciplinary and complex adaptive systems perspective, we highlight evidence-based digital solutions to improve social connection and inclusion and, consequently, health outcomes. We describe actionable strategies for ensuring that digital health innovations benefit all, highlighting how user-centered design can address diverse needs, particularly for structurally disadvantaged populations.

Sarcomerogenesis: Evidence, Context And Key Stimuli—Response To The Commentary By Power Et Al., Anthony J. Blazevich, Walter Herzog, João Pedro Nunes

Research outputs 2022 to 2026

No abstract provided.

Stocks And Fluxes Of Carbon And Nitrogen In Northeastern Brazil Coastal Seascapes, Antoniwal A. Jatobá-Junior, Pere Masque, Carlos Eduardo De Rezende, Vanessa Hatje

Research outputs 2022 to 2026

Quantifying carbon and nitrogen dynamics is essential for understanding the role of coastal ecosystems in climate change mitigation and habitat connectivity. We assessed organic carbon (OC) and total nitrogen (TN) stocks, accumulation rates, and isotopic composition (δ¹³C and δ¹⁵N) in sediment across diverse seascapes in northeastern Brazil, including high- and low-salinity mangroves, a tidal flat, a freshwater marsh, and an inundated forest. OC stocks in the upper meter of sediment were highest in the freshwater marsh (283 ± 64 Mg OC ha⁻¹) and tidal flat (266 ± 27 Mg OC ha⁻¹), and …

How Leaders Build Employee Trust In Artificial Intelligence: Voice Opportunities, Humility, And Trust Transfer, Jack Mcguire, David De Cremer, Devesh Narayanan

Research Collection Lee Kong Chian School Of Business

Artificial intelligence is increasingly central to organizational work, yet employee trust in AI remains fragile. Although prior research has primarily explained trust in AI through technological characteristics such as transparency, reliability, and accuracy, we argue that trust in AI is also shaped by the social context in which employees encounter these systems. Drawing on affect-as-information theory and social information processing theory, we develop and test a model in which leader-provided voice opportunities reduce employees’ negative affect about AI-related work experiences, thereby enhancing perceptions of leader trustworthiness and, in turn, trust in AI. We further propose that this indirect effect depends …

Team-On-Team Negotiation: How Internal Structure Shapes What Teams Can Do At The Table, Leyi Holly Shi, Tianyu He, Robert B. Lount Jr., Michael Schaerer, Roderick I. Swaab

Research Collection Lee Kong Chian School Of Business

Team negotiation research presents a paradox: teams sometimes achieve more integrative outcomes than solo negotiators, yet in other cases they escalate competitiveness and harm relational outcomes. Existing theory has not resolved this inconsistency, in part because it treats negotiating teams as if they could change positions as easily as individual negotiators. We argue this assumption overlooks a central constraint of team-on-team negotiation: before any adaptive external exchange can occur, teams must internally authorize revisions to their positions as new information emerges. Drawing on evidence from research on team negotiation, multiparty negotiation, and team design, we identify this internal capacity as …

Representing The Brand: A Study To Examine The Best Practices For Structuring And Operating Communications Teams In Higher Education Institutions, Margaret L. Reisser

Masters Theses and Doctoral Dissertations

As higher education institutions increasingly compete for students, faculty, funding, and recognition, academic leaders are recognizing the essential role communications and public relations professionals play in maintaining and promoting the value of their institutional brands. Much has been written about the value of communications professionals in brand management in the corporate arena. However, it appears less attention has been paid to their role in higher education. This mixed-methods study was undertaken to examine the best practices for structuring and operating communications and public relations organizations for optimal success in promoting the higher education institutions they represent. Communications and public relations …

Writing Assessment In Tennessee Community Colleges, Joshua Tucker

Masters Theses and Doctoral Dissertations

This mixed-methods study examined how composition faculty at Tennessee community colleges used margin comments to support student writing, whether those comments reflected principled or novice feedback language, and how instructors understood and described their own commenting practices. Marginal feedback remains the most widely used yet least theoretically examined form of response in first-year writing instruction, and the legislative reforms reshaping Tennessee's community college system, including the corequisite model, TNPromise, and TNReconnect have intensified questions about the pedagogical practices used to support an increasingly diverse student population. Eight full-time English instructors at Tennessee community colleges participated in the study, submitting 771 …

A Genomic Approach For Accurate Identification Of Closely Related Species With Next-Generation Sequencing Samples, Nour Al Dain Marzouka, Amira Al-Aamri, Fatima Alshamsi, Mariam Khalili, Sarah El Hajj Chehadeh, Meera S. Mohamed, Yassir Mohammed Eltahir, Rafeek Koliyan, Mohamed Moustafa Abdelhalim, Assem Attia, Mira Mousa, Guan Tay, Habiba Alsafar

Research outputs 2022 to 2026

Accurate species identification from Whole Genome Sequencing (WGS) data remains challenging, particularly for closely related species such as sheep (Ovis aries) and goats (Capra hircus). Through analysis of mapping quality metrics and Kraken2 taxonomic classification of 40 WGS sheep and goat samples, we demonstrate that conventional approaches yield ambiguous results, with overlapping alignment rates and inconclusive taxonomic assignments. We present a robust comparative genomic approach that uses species-specific genomic regions to distinguish these species in WGS samples. We define species-specific regions as those exhibiting distinctive coverage patterns: average coverage when samples are aligned to their matching reference genome but absent/low …

A Global Image-Based Data Repository Of Killer Whale Interactions With Elasmobranchs, Emma Luck, Isabella L. Reeves, Maeva Terrapon, Rebecca Wellard, Stephanie K. Venables, Alison V. Towner, Alison A. Kock, Charlotte Hussain, Molly Altschwager, Rosie Ballard, Evans Baudin, Nancy Black, Evan Brodsky, Jade Cantrall, Julio Cardoso, Matt I.D. Carter, Oliver Clarke, Santiago Diaz-Pazmino, David Donnelly, Georgina Cabayol Ferraz, Arlaine Francisco, Laura González García, Mark Jackman, Aimee Jan, Eric Martin, Dane Mcdermott, James Moskito, Blair Ranford, Jesús Erick Higuera Rivas, Jasmin O’Brien, Anton Oleynik, Hernán Orellana-Vásquez, Daniela Alarcón Ruales, Gemma Sharp, Jade Sharp, Alisa Schulman-Janiger, Colleen M. Talty, Paul Tixier, John A. Totterdell, Steve Truluck, Jennah Tucker, Tara Weberg, M. Fernanda Urrutia-Osorio, Machi Yoshida, Jochen R. Zaeschmar, Lauren Meyer

Research outputs 2022 to 2026

Killer whales (Orcinus orca) are cosmopolitan apex predators that interact with numerous species, including sharks, skates, and rays (subclass Elasmobranchii). Interactions between killer whales and elasmobranchs have garnered attention from the scientific community, but the dynamics of these events are poorly understood, as interactions are often challenging to observe. In this study, we collated imagery of interactions between killer whales and elasmobranchs to create the first image-based repository of interspecific interactions between marine predators. A total of 320 photos and videos from 82 unique interactions were collected from 12 countries. A minimum of 18 elasmobranch species across 16 genera were …

Eccentric Exercise: Muscle Damage To The New Normal, Kazunori Nosaka

Research outputs 2022 to 2026

No abstract provided.

Natural Gas Hydrate Production And Co2 Storage Via Clathrate Hydrates: Challenges And Opportunities, Abdirahman Hassan Mohamed, Aliyu Adebayo Sulaimon, Haylay Tsegab, Bhajan Lal, Stefan Iglauer, Muhammad Ali

Research outputs 2022 to 2026

One of the most demanding environmental and economic challenges of this era is that of supplying the increasing global energy demand while reducing and neutralizing the CO2 footprint. In this regard, the provision of a secure and diversified energy supply and the sequestration of CO2 into geological formations are currently of great significance. However, the buoyant nature of CO2 under the temperature and pressure conditions of typical geological sites leads to the risk of CO2 leakage, and thus necessitates long-term monitoring. Therefore, the hydrate-based sequestration of CO2 beneath oceanic sediments has become a desirable alternative to conventional geologic sequestration in …

Association Of Glycd147 With Carotid Atherosclerosis: Evidence From Integrative Analyses, Cuihong Tian, Yang, Xingang Li, Hongxia Zhang, Jieyi He, Jinxiu Zhu, Yequn Chen, Xuerui Tan

Research outputs 2022 to 2026

Background: Atherosclerosis is an inflammatory cardiovascular disease that progresses with ageing. Glycosylation plays a significant role in inflammation and contributes to the pathogenesis of ageing-related diseases, including atherosclerosis. Cluster of differentiation 147 (CD147), a glycosylated agonist of matrix metallopeptidase 9 (MMP9), serves as an inducer of atherosclerosis and atherothrombosis. However, the effect of glycosylated CD147 (GlyCD147) on atherosclerosis remains unclear. This research aims to identify whether GlyCD147 is associated with atherosclerosis. Methods: To begin with, a clinical case-control study was designed to assess the differences of CD147 and GlyCD147 between 69 carotid atherosclerosis (CAS) cases and 69 controls. Traditional atherosclerotic …

Climate Change Impacts On Fish-Related Ecosystem Services: Synthesis, Network Analysis, And Strategic Pathways For Coordinated Adaptation, Ebenezer Afrifa-Yamoah, Awuah-Mensah, Stephen Bradshaw, Ute Mueller

Research outputs 2022 to 2026

Climate change is rapidly disrupting fish-related ecosystem services that underpin global food security, economic livelihoods, and cultural identity across both marine and freshwater systems. While impacts are increasingly recognised, disciplinary fragmentation has hindered integrated understanding of how climate-driven changes in fish populations affect ecosystem service delivery. This review makes two integrated contributions: a hierarchical synthesis tracing causal pathways from physical climate drivers through biological and ecological responses to socioeconomic outcomes, and a qualitative network analysis that maps the interconnections, implementation readiness, and strategic sequencing of seven major adaptation strategies. Ocean warming, acidification, deoxygenation, and their increasingly frequent co-occurrence as compound …

Creativity Development In Art Education: A Proposed Framework, Enock Swanzy-Impraim

Research outputs 2022 to 2026

Creativity and its development have been regarded as integral to 21st-century education. Although researchers have made several contributions to the development of creativity in schools, there remains a paucity of educational inventories on conceptual frameworks that tackle creativity development in its entirety, highlighting the essential constructs and elements required for the creativity-fostering process in the educational ecosystem. Therefore, this study proposes a framework that holistically provides a view of 11 elements necessary for successful facilitation of creativity in educational environments and the transition of creativity from policy to the local school system. These elements are: teachers’ training concerning creativity, teachers’ …

Body Composition And Muscle Health Changes After Providing Vascular Imaging Results In Older Adults: Secondary Analysis Of A Randomised Controlled Trial, Jack Dalla Via, Simone Radavelli-Bagatini, Marc Sim, Abadi K. Gebre, Catherine P. Bondonno, Kun Zhu, Shelby Mullin, John T. Schousboe, Richard J. Woodman, Markus P. Schlaich, Moira Sim, Pawel Szulc, Douglas P. Kiel, Wai H. Lim, Robin M. Daly, Jonathan M. Hodgson, Joshua R. Lewis

Research outputs 2022 to 2026

Background: Provision of vascular imaging results has been investigated to prompt changes towards healthy lifestyle behaviours, but effects on body composition and muscle health are unknown. Aim: This secondary analysis of a 12-week parallel-group randomised controlled trial (RCT) aims to explore body composition and muscle health effects of providing healthy lifestyle education (Ed) with and without abdominal aortic calcification (AAC) results. Methods: A total of 240 Australian community-dwelling older men and women (mean ± SD age 68 ± 5 years; 58% female; 57.1% with evidence of AAC) were randomised to AAC + Ed (n = 121) or Control + Ed …

Discriminative Performance Of Externally Validated Dementia Risk Prediction Models: A Systematic Review And Meta-Analysis, Blossom C.M. Stephan, Jacob Brain, Kaarin J. Anstey, Tanya Buchanan, Claire V. Burley, Elissa Burton, Jennifer Dunne, Linda Errington, Matthew Gorringe, Zhongyang Guan, Bronwyn Myers, Serena Sabatini, Marc Sim, William Stephan, Eugene Yee Hing Tang, Narelle Warren, Mario Siervo

Research outputs 2022 to 2026

Background: Data on the external validation of current dementia risk prediction models has not yet been systematically synthesised. This systematic review and meta-analysis collated results from three previous reviews to evaluate the predictive discriminative performance of dementia risk models when validated in population-based settings. Methods: Embase (via Ovid), Medline (via Ovid), Scopus, and Web of Science were searched from inception to June 2022 with an updated search conducted up to November 2024. Included studies (1) had a population-based cohort design; (2) assessed incident late-life (i.e. ≥ 60 years) dementia; and (3) reported predictive performance of at least one dementia risk …

Enhancing Independence And Social Connection: The Impact Of A Tailored Exercise Program On New Residents Transitioning Into Australian Residential Care Facilities, Stacey Scott, Annette Raynor, Julie Dare, Jennifer Grieve, Leesa Costello

Research outputs 2022 to 2026

Background: Transitioning from independent living to a residential care facility often results in a significant loss of independence, autonomy, and connectedness, leaving new residents with profound feelings of loss and grief. In light of these challenges, this study explored the potential benefits of a tailored in-house exercise program for new residents. Methods: The study took place in an Australian residential care facility and included four new residents (aged 72 to 88, 75% female), who participated in a 12-week tailored exercise program led by an exercise physiologist. A focused ethnographic approach was used to obtain a comprehensive data set, drawing on …

Experiences In Building Social Connectedness And Sense Of Belonging: Voices From African Migrants In Australia, Uchechukwu Levi Osuagwu, Kelechukwu Enyinnaya Ahaiwe, Obed Adonteng-Kissi, Anayochukwu Edward Anyasodor, Kerrie E. Doyle

Research outputs 2022 to 2026

Strategies to address social exclusion often involve promoting social connectedness and a sense of belonging. Drawing from existing literature on social inclusion, social connectedness, and belonging, including the use of primary data, this study explored the experiences of African migrants regarding their sense of connectedness and belonging in Australia. Semi-structured interviews were conducted online with 16 African migrants living in Australia. Using purposive sampling, participants were recruited through community groups across various towns and cities. Interviews were conducted via Teams and Zoom video calls, and subsequently transcribed manually for thematic analysis. Findings highlight the necessity for interventions targeting isolation and …

Suicide Ideation Detection Using Social Media Data And Ensemble Machine Learning Model, Erol Kina, Jin Ghoo Choi, Abid Ishaq, Rahman Shafique, Monica Gracia Villar, Eduardo Silva Alvarado, Isabel De La Torre Diez, Imran Ashraf

Research outputs 2022 to 2026

Identifying the emotional state of individuals has useful applications, particularly to reduce the risk of suicide. Users’ thoughts on social media platforms can be used to find cues on the emotional state of individuals. Clinical approaches to suicide ideation detection primarily rely on evaluation by psychologists, medical experts, etc., which is time-consuming and requires medical expertise. Machine learning approaches have shown potential in automating suicide detection. In this regard, this study presents a soft voting ensemble model (SVEM) by leveraging random forest, logistic regression, and stochastic gradient descent classifiers using soft voting. In addition, for the robust training of SVEM, …

The Impact Of Testing-Parameter Variability On Force Production In The Isometric Single-Leg Long-Lever Bridge: Implications For Training And Testing Rigor In Sporting Environments, Adam E. Sundh, Nicholas J. Ripley, A. J. Lamb, Conor J. Cantwell, Paul Comfort

Research outputs 2022 to 2026

Background: The aim of this study was to determine the impact of knee angle variability on force production outcomes during the single-leg isometric long-lever bridge, thus providing monitoring guidelines for testing rigor with direct implications for feasibility across a variety of high-performance sporting environments. Methods: Thirty men (age: 19.4 ± 1.3 years; height: 179.8 ± 6.3 cm; body mass: 80.4 ± 10.3 kg) and 14 women (age: 20.0 ± 1.3 years; height: 166.9 ± 7.2 cm; body mass: 64.4 ± 7.4 kg) all of whom were Division 3 athletes with no recent injury history volunteered to participate in the study. …

From Solitons To Chaos: Nonlinear Dynamics Of The Time-Fractional Modified Regularized Long-Wave Equation, Samsun Nahar Ananna, Chunhui Lu, Abdulla Al Mamun, Md Al Amin Meia, Nur Hasan Mahmud Shahen

School of Mathematical & Statistical Sciences Faculty Publications

This study investigates the nonlinear wave structures and complex dynamical behavior of the time-fractional modified regularized long-wave (mRLW) equation through an integrated analytical, numerical, and dynamical framework, with particular emphasis on connecting localized wave formation with perturbation-induced nonlinear dynamics. Within the adopted fractional framework, a Hirota-type bilinear approach is employed to construct one-wave, two-wave, three-wave, lump, one-lump–one-soliton, and one-lump–one-stripe structures, whose numerical consistency is subsequently examined using the Modified Variational Iteration (MVI) method through graphical comparisons and L 2 and L ∞ error norms. The periodically perturbed mRLW system is further investigated using phase portraits, Lyapunov exponents, bifurcation diagrams, Poincaré …

Genomic Markers Of Performance Within An Organic Pasture-Based Dairy Heifer Development Program, Connor Douglas Waldron

All Graduate Theses and Dissertations, Fall 2023 to Present

Pasture-based dairying is important to organic milk production, but young heifers differ in how well they eat, grow, and adapt to grazing. This study tested whether commercial genetic information could help identify which heifers would perform best on pasture. Genetic samples from 139 Holstein, Jersey, Holstein-Jersey, and ProCross heifers raised on organic pastures in northern Utah were analyzed with the Neogen Igenity Select test and compared with measurements of feed intake, growth, and grazing performance. Genetic scores clearly separated the breed groups, but they were not strong predictors of how individual heifers grew on pasture. Pasture quality, especially forage nutrient …