Digital Commons Network^™

A Quantitative Study Teaching De-Escalation With Virtual Reality Simulation To Associate Nursing Students Measuring Effectiveness, Learning, And Confidence, Michele Rene Marbet

Doctoral Dissertations and Projects

Workplace violence against nurses is a critical global public health issue, as one in four nurses reportedly experience physical assault by patients. This quantitative quasi-experimental, pretest-posttest study aimed to assess the effectiveness of virtual reality simulation as a teaching strategy for de-escalation education in associate nursing students’ (N = 29) perception in learning and confidence. The study utilized the Simulation Effectiveness Tool-Modified (SET-M) instrument to measure outcomes guided by Kolb's experiential learning theory and the NLN Jeffries simulation theory. The learning variable demonstrated significant improvement as confirmed by paired t-test analysis (p < .01). For the effectiveness and confidence variables, which violated assumptions of normality, a comprehensive statistical approach was implemented. Analysis included parametric testing via paired t-tests, supplemented by nonparametric methods (Wilcoxon Signed-ranks test and Sign test) to ensure statistical rigor. The cumulative results across all three statistical tests consistently demonstrated significant improvements (p < .001). Effect size calculations revealed medium to large significance for all variables measured by Cohen’s d. The conclusive findings of this research included a rejection of all three null hypotheses, which suggests that virtual reality simulation is an effective teaching strategy for developing de-escalation skills, enhancing both learning and confidence among associate nursing students. Future studies are needed to further validate and expand upon the findings of the current research, potentially leading to more widespread adoption of virtual reality simulation in nursing education for teaching de-escalation.

Determinants Of Trading Prices In State-Owned Asset And Equity Transactions: An Empirical Analysis From China, Lixiao Chen

Dissertations and Theses Collection (Open Access)

This thesis examines the determinants of pricing outcomes in state-owned asset transactions using a comprehensive dataset of 3,638 transactions from a major transitional economy. Contrary to conventional expectations, we find that fixed assets consistently receive less favorable pricing compared to equity assets, with significantly lower odds of trading above professional valuation and higher odds of trading below valuation. This pattern persists across multiple specifications and remains robust to propensity score matching approaches that address selection concerns. I further demonstrate that state-owned buyers secure significant advantages in transaction pricing, with dramatically lower odds of paying premiums over valuation or listing prices …

The Dynamics Of Power Transfer In Organizations: Examining Downward Deference And Its Workplace Consequences, Hoang Bao My Nguyen

Dissertations and Theses Collection (Open Access)

This dissertation examines managerial power transfer as a core mechanism through which less-hierarchical management unfolds in organizations. While traditional management research has emphasized formal authority and top-down control, emerging organizational forms increasingly call on managers to share power with subordinates. Despite growing interest in constructs like empowerment, delegation, and participative leadership, the phenomenon of power transfer remains conceptually fragmented and undertheorized.

To address this, the dissertation defines power transfer as the intentional redistribution of authority, control, or resources by powerholders to lower-power individuals. Chapter 1 develops a typology of power transfer behaviors, organized along two key dimensions: extent of control …

Government Guidance Funds And Corporate Innovation: An Empirical Examination Based On Hangzhou, Huaping Wang

Dissertations and Theses Collection (Open Access)

Since the establishment of China's first market-oriented government guidance fund in 2002, these funds have actively played a supportive role in addressing market failures and promoting the innovative development of technology enterprises by reducing information asymmetry in the primary equity market, releasing positive signals, and alleviating financing constraints. With the establishment and development of China's multi-tiered government guidance fund system, related research has gradually emerged. However, current studies primarily explore whether government guidance funds have fulfilled their role in fostering innovation from a macro perspective, with limited in-depth discussion from a micro-level on how these funds should conduct their investment …

Disentangling User Preferences Towards Self-Interpretable Recommender Systems, Nhu Thuat Tran

Dissertations and Theses Collection (Open Access)

Understanding user preferences remains a central challenge in recommender systems due to their inherently complex, unstructured, and multi-faceted nature, exacerbated by the sparsity of user interaction data. Traditional approaches often compress user interests into a single latent vector, overlooking the fact that user preferences are typically shaped by multiple underlying factors that differ across individuals. These latent drivers are not directly observable and must be discovered through unsupervised modeling, further complicated by limited historical interactions per user.

This dissertation addresses these challenges by introducing a principled framework for multiinterest modeling, which disentangles user behaviors into multiple latent factors to better …

Tailoring Transformer-Based Deep Learning For Code Generation And Translation, Imam Nur Bani Yusuf

Dissertations and Theses Collection (Open Access)

Software is increasingly pervasive in modern society, making the effective translation of human intent into code essential. Novice programmers often struggle with domain-specific code due to limited background knowledge, while experienced developers face challenges in maintaining evolving largescale codebases. Traditional pattern-based approaches address these issues, but such approaches are task-specific and require significant adaptation for different tasks. Transformer-based models offer a more flexible alternative, as the same architecture can be tailored for diverse programming tasks.

This dissertation investigates how Transformer-based models can be customized for various code generation and translation tasks. First, it introduces Transformer-based approaches that assist end-users with …

To Mitigate Or Adapt? A Construal Level Perspective On Agenda Setting For Climate Action, Shu Tian Ng

Dissertations and Theses Collection (Open Access)

Climate change is no longer a distant threat, but a present crisis—making the question of how we act timelier than whether we act. This research investigates how people evaluate different approaches to climate action—specifically, mitigation (reducing emissions) and adaptation (coping with impacts)—through the lens of the Construal Level Theory (Liberman & Trope, 1998; Trope & Liberman, 2010). Across three studies, I examined how perceptions of desirability and feasibility influence preferences for different climate action strategies. Study 1 found that, to laypeople, mitigation was perceived as more desirable while adaptation was perceived as more feasible. Study 2 attempted to manipulate individuals’ …

Empirical Program Evaluation In Operations Management, Kai Tian

Dissertations and Theses Collection (Open Access)

This dissertation focuses on advancing and applying empirical program evaluation methodologies in Operations Management (OM), defining it not as mere prediction but as rigorously establishing causal effects of interventions. Chapter 2 lays the theoretical groundwork, defining empirical program evaluation within OM, detailing its alignment with causal inference, and outlining both classical econometric techniques and emerging Causal Machine Learning (CML) approaches for mitigating endogeneity. Building on this foundation, Chapter 3 presents an empirical application, evaluating the causal impact of a customer targeting strategy using live-streaming advertisements, employing Propensity Score Matching (PSM) in conjunction with linear regression models to derive actionable insights …

Efficacy And Safety Of Moxibustion For Knee Osteoarthritis: A Systematic Review And Meta-Analysis, Shun Chen, Weiting Liu, Changhao Liang, Hanjiang Liu, Pei Wang, Qinwei Fu

Research outputs 2022 to 2026

Background and purpose: Although several reviews have examined moxibustion for knee osteoarthritis (KOA), they have some methodological limitations. This systematic review aims to synthesize current evidence on various moxibustion interventions for KOA pain relief. Methods: We conducted a comprehensive search across seven databases up to June 2024. The Cochrane risk of bias tool (ROB2) was used to assess the risk of bias, and the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) criterion approach was employed to evaluate the certainty of evidence for primary outcomes. Primary outcomes included Visual Analogue Scale (VAS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), …

Risk Factors Associated With Helicobacter Pylori Infection In The Urban Population Of China: A Nationwide, Multi-Center, Cross-Sectional Study, Liang Wang, Zheng Kang Li, Jin Xin Lai, Yu Ting Si, Jie Chen, Eng Guan Chua, Ling Yan Dai, Qiong Dai, Xu Bo Dai, Zhao Hui Deng, Hong Du, Qi Fang, Cui Feng, Min He, Guo Chu Hu, Yi Zhong Hu, Hui Huang, Yan Jiang Huang, Fen Li, Jun Hong Li, Qi Xin Li, Zhi Fang Lin, Hai Tao Liu, Ming Bo Liu, Jin Hua Luo, Jian Hong Ma

Research outputs 2022 to 2026

Objectives: To assess the risk factors associated with Helicobacter pylori infection in the urban Chinese population. Methods: The study was conducted from March to November 2023, including 12,902 urban participants aged 18-60 years across 52 cities distributed over 26 provinces in China. Risk factors included socioeconomic status, lifestyles, and public understanding. Univariate and multivariate logistic regression analysis was used to calculate corrected odds ratios (ORs) and 95% confidence intervals (CIs). Results: According to multivariate logistic regression, risk factors associated with significantly higher H. pylori infection rates included residency in developing (OR 1.27, 95% CI 1.13-1.43) and undeveloped cities (OR 1.15, …

Risk Factors For Mismatches In The Art Laboratory: An Analysis Of 73,719 Electronic Witnessing Points, Maria Forbrig, Kelli Peirce, Chris Copeland, Jay Natalwala, Vincent Chapple, Yanhe Liu

Research outputs 2022 to 2026

Research question: What are the risk factors for mismatches (involving or not involving biological material) and critical mismatches (CMM; involving biological material) in an assisted reproductive technology laboratory equipped with an electronic witnessing system (EWS)? Design: In total, 73,719 witnessing points were extracted retrospectively from an EWS database, representing 11,210 consecutive treatment cycles performed at Fertility North between January 2016 and July 2023. Results: Overall, 138 (0.19%) mismatches and 16 (0.02%) CMM were identified during the study period. Significant differences were detected in both mismatch (P = 0.003) and CMM (P = 0.038) rates between different time periods of the …

Sex Differences In Upper- And Lower-Limb Muscle Strength In Children And Adolescents: A Meta-Analysis, James L. Nuzzo, Matheus D. Pinto

Research outputs 2022 to 2026

On average, adult men are physically stronger than adult women. The magnitude of this difference depends on the muscle tested, with larger sex differences observed in upper- than lower-limb muscles. Whether body region-specific sex differences in strength exist in children is unclear. The purpose of the current meta-analysis was to determine whether sex differences in muscle strength in children and adolescents differ between upper- and lower-limb muscles. Data were extracted from studies of participants aged ≤ 17 years who completed tests of maximal isometric or isokinetic strength of upper-limb muscles (e.g., elbow flexors and elbow extensors) or lower-limb muscles (e.g., …

Successful Commercialisation In Startup Accelerator Programmes: How Different Startup Ecosystems Matter, Farzaneh Eslamloo, Kerry Brown, Zahra Amrollahi Biyouki

Research outputs 2022 to 2026

This study examined the influence of the Western Australian and Iranian startup ecosystem contexts, including the powers and liabilities that determine startups’ commercialisation outcomes. By utilising a theoretical framework based on programme evaluation, explanatory theory building, and critical realism, a cross-contextual comparison study was conducted. The study showed that the context of startup accelerator programmes and the startup ecosystem is an important determinant of commercialisation outcomes. The study revealed factors that impede startup accelerator programme success, including low follow-on investment, ecosystem immaturity, the ineffective agency of the Western Australian and Iranian governments, low levels of talent among startup agents, and …

Mapping The Voices: Spanish Boat Owners And Marina Operators On Non-Indigenous Marine Species—Knowledge And Key Informants, Gemma Martínez-Laiz, Kaeden Leonard, Chi Thai Uyen Le, Chad Roy Le Hewitt, José Manuel Guerra-García, Carlos Navarro-Barranco, Sara García-Garrido, Marnie L. Campbell

Research outputs 2022 to 2026

The public need to be aware of non-indigenous species (NIS) and how they spread to effectively manage this marine biosecurity risk. In most countries, the management of biosecurity risks associated with recreational boating relies exclusively on vessel owners and marina managers engaging in pro-environmental behaviours. To understand if this management approach is feasible, stakeholders’ perceptions first need to be identified. Surveys assessed people’s knowledge, awareness about NIS and channels involved in risk communication in three countries with different management scenarios and marine biosecurity histories: Spain, Australia and New Zealand. There was a mismatch between perceived and actual knowledge of NIS …

Resistance Exercise Dose Effects On Muscle Morphology, Muscle Function And Quality Of Life In Advanced-Stage Ovarian Cancer Survivors, Christelle Schofield, Marit Mol, Dennis R. Taaffe, Laurien M. Buffart, Pedro Lopez, Robert U. Newton, Daniel A. Galvão, Paul A. Cohen, Carolyn J. Peddle-Mcintyre

Research outputs 2022 to 2026

Aim: Advanced-stage ovarian cancer survivors often have compromised muscle morphology (muscle mass and density), muscle function (muscle strength and physical function), and health-related quality of life (HRQoL). We recently reported improvements in these outcomes following resistance training. Information on the resistance exercise dose required to improve health-related outcomes is still lacking in this cancer group. Here we examined the exercise dose delivered and the effect of the delivered dose on changes in outcomes of interest. Methods: Twelve women with stage III or IV ovarian cancer completed a 12-week supervised resistance exercise intervention. Exercise metrics included compliance (exercise dose completed), dose …

Septo-Optic Dysplasia And Gastroschisis: Trends In Birth Prevalence And Association With Maternal Age, David J. Cullingford, Mary B. Abraham, Aris Siafarikas, A. Marie Blackmore, Jenny Downs, Peter Jacoby, Gareth Baynam, Catherine S.Y. Choong

Research outputs 2022 to 2026

This study aims to describe the risk factors and trends in birth prevalence of septo-optic dysplasia (SOD) and gastroschisis between 1980 and 2023. This descriptive, population-based study of SOD and gastroschisis used Western Australian Register of Developmental Anomalies data from 1980 to 2023. Birth prevalence was calculated using Midwives Notification System data for all births after 20 weeks gestation. Relative risk (RR) for SOD and gastroschisis showed risk by maternal age. SOD and gastroschisis occurred in 99 and 391 cases respectively (no dual diagnoses), with a birth prevalence of 1.41 and 3.71 per 10,000 respectively (from 2010 to 2019), and …

Transformative Learning In Homebirth Settings: A Reflexive Thematic Analysis Of Midwifery Students' Experiences, Kate Buchanan, Sara Morris, Sara Bayes, Clare Davison

Research outputs 2022 to 2026

Background: The homebirth setting provides opportunities for midwifery students to witness autonomous midwifery practice, but these experiences are limited. Factors that limit practicum placement in the home birth setting are either logistical, with less than one percent of women having a homebirth in Australia or related to university governance, whereby approval is not granted for midwifery students attending homebirth. Objectives: To explore midwifery students' experiences in the homebirth setting and to determine how this has influenced understandings of the role and scope of practice the midwife. Methods: Qualitative methods were chosen to inform this study. Setting: A University that offers …

Nitrate And Nitrite Food Composition Database: An Update And Extensive Deep Dive, Liezhou Zhong, Jonathan M. Hodgson, Joshua R. Lewis, Lauren C. Blekkenhorst, Nicola P. Bondonno, Marc Sim, Richard J. Woodman, Catherine P. Bondonno

Research outputs 2022 to 2026

Background: Growing evidence suggests that health outcomes of dietary nitrate and nitrite intake are food source dependent. Robust evaluations in dietary studies necessitate a comprehensive and current food composition database of nitrate/nitrite content, along with variation based on country or region of origin, calendar year, growing season, and cooking method. Objectives: The objectives of this study were to update the previous animal- and plant-based food nitrate/nitrite databases and investigate effects of cooking methods, seasonal and geographic variations, and longitudinal changes on nitrate and nitrite content to guide application of the database in observational and clinical studies. Methods: Food nitrate/nitrite composition …

Excess Weight Is Associated With Neurological And Neuropsychiatric Symptoms In Post-Covid-19 Condition: A Systematic Review And Meta-Analysis, Débora Barbosa Ronca, Larissa Otaviano Mesquita, Dryelle Oliveira, Ana Cláudia Morais Godoy Figueiredo, Jun Wen, Manshu Song, Kênia Mara Baiocchi De Carvalho

Research outputs 2022 to 2026

Background/purpose Excess weight has been identified as a potential risk factor for post-COVID-19 condition (PCC). This systematic review and meta-analysis aimed to investigate whether excess weight is associated with the development or experience of neurological and neuropsychiatric symptoms in PCC. Methods We conducted a comprehensive search of eight databases (PubMed, Embase, Scopus, Web of Science, VHL, Google Scholar, ProQuest, and medRxiv) for studies published up to July 2023. Studies were included if they assessed PCC symptoms in relation to nutritional status, specifically the development of neurological and neuropsychiatric symptoms more than 12 weeks post-infection. The analysis compared exposure and controls …

Navigating Travel Therapy: Balancing Benefits And Risks For Optimal Wellness, Fangli Hu, Jun Wen, Wei Wang

Research outputs 2022 to 2026

This research note examines travel therapy as a novel healthcare approach in which positive travel experiences serve to promote well-being. It emphasizes the need for a balanced assessment of the benefits and risks associated with travel therapy, offering insights into this practice's evolving roles in the health and wellness domains.

Origins: Nutritional Profile Of Children Aged One Year In A Longitudinal Birth Cohort, Sarah Whalan, Poonam K. Pannu, Rachelle A. Pretorius, Alexander J.J. Scherini, Sonia Gregory, Susan L. Prescott, Desiree Silva

Research outputs 2022 to 2026

Background: Dietary intake during the first year of life is a key determinant of a child’s growth and development. ORIGINS is a longitudinal birth cohort study investigating factors that contribute to a ‘healthy start to life’ and the prevention of non-communicable diseases. Methods: This descriptive cross-sectional study aims to describe the dietary intakes of one-year-old children participating in ORIGINS and compare these to the Australian Dietary Guidelines and Nutrient Reference Values (NRVs). Between 2020 and 2023, dietary intake data were collected on 779 one-year-old children using a Food Frequency Questionnaire (FFQ). The analysis explored milk intake (breastmilk, infant formula, and …

Revised Phylogeography Of The Common Brushtail Possum (Trichosurus Vulpecula) Reveals New Insights Into Genetic Structure Across Australia, Shelby C. Middleton, Robert A. Davis, Kenny J. Travouillon, Anna J.M. Hopkins, Harriet R. Mills, Linette S. Umbrello

Research outputs 2022 to 2026

Understanding genetic relationships within species is essential for identifying distinct genetic lineages and informing conservation strategies, particularly for species with fragmented or widespread geographic distributions. One such widespread species that has suffered declines across Australia, despite remaining common in some areas, is the common brushtail possum (Trichosurus vulpecula), a nocturnal and arboreal marsupial. Previous genetic studies on brushtail possums had limited sampling, which has precluded a comprehensive assessment of the relationships within the species and genus. Using both single nucleotide polymorphism markers and the mitochondrial cytochrome b gene, this study employed phylogenetics, ancestry coefficients, and tested genetic differentiation, to examine …

Factors That Influence International Nursing Students’ Experiences And Perceptions Of Their Learning Environments: A Scoping Review, Fatch Welcome Kalembo, Sally Wilson, Terena Solomons, Irene Ngune, Eric Lim, Anna Bosco, Paul Kebble, John Taplin, Janie Brown

Research outputs 2022 to 2026

Objective: The objective of this review was to explore factors that influence international undergraduate nursing students’ experiences and perceptions of their learning environment. Introduction: In the past 2 decades, international student enrollment in tertiary education increased globally, with English-speaking countries such as Australia, Canada, the United Kingdom, and the United States attracting a significant majority of these students. Many of these international students are attracted to studies in health professions and related sciences, particularly nursing. Despite their economic and cultural contributions to the host country, international nursing students face numerous challenges that affect their learning experiences. Inclusion criteria: Peer-reviewed studies …

A Multivariate Analysis Of Reported Quality Of Life Among Medical Students In Jordan Using The Whoqol-Bref, Mohammad Hamad, Saba Al Smadi, Diana Arabiat

Research outputs 2022 to 2026

BACKGROUND: Low quality of life (QoL) in university students is often associated with unhealthy lifestyle and negative impacts on students' ability to learn and succeed. To date, no research has examined the QoL of medical students in Jordan or the demographic factors that may associate with lower QoL. MATERIALS AND METHODS: A quantitative, cross-sectional study with a descriptive design was chosen for this study. Participants were 512 medical students from one public university in Jordan. The Arabic version of the World Health Quality of life-brief survey (WHOQOL-BREF) was used to collect data online from students. RESULTS: Regarding the overall QoL, …

Changes In The Contributions Of Risk Factors To Under-Five Mortality In Low- And Lower-Middle-Income Countries (1997-2022): An Analysis Of Demographic And Health Survey Data, Bereket Kefale, Jonine Jancey, Amanuel T. Gebremedhin, Gavin Pereira, Gizachew A. Tessema

Research outputs 2022 to 2026

Background: Under-five mortality (U5M) is a critical public health challenge in low- and lower-middle-income countries (LLMICs), where over 90% of global deaths occur. Despite progress, the changing contributions of risk factors to U5M in LLMICs remain unexplored.

Mrthods: We analysed Demographic and Health Survey (DHS) data from 24 LLMICs across two periods: 1997-2005 and 2016-2022. We included 139,890 live births in 1997-2005 and 319,034 in 2016-2022. A mixed-effects robust Poisson regression model with a log link function was employed to identify risk factors of U5M in each period. Population-attributable fractions (PAFs) were calculated and compared to investigate changes in the …

Comparison Of Physical Characteristics Among English Professional And Semi-Professional Soccer Players Across Different Leagues, Nicholas Joel Ripley, Jack Fahey, Paul Jones, Jake Batsford, Paul Sindall, Christopher Bramah, Paul Comfort

Research outputs 2022 to 2026

The purpose of the present study was to investigate if differences exist in neuromuscular qualities between different leagues in English male soccer. Twenty soccer players (age: 23.3±5.2 years, stature: 180.3±7.0cm, mass: 82.5±7.7kg) from English football league two (EFL2). 34 soccer players (age: 25.8±4.3 years, stature: 180.9±5.6cm, mass: 81.4±8.6kg) from National league (NL) and 23 soccer players (age: 27.5±4.3 years, stature: 182.1±5.5cm, mass: 84.1±8.0kg) from National league North (NLN). Each player completed three to five repetitions of the countermovement jump (CMJ), countermovement rebound jump (CMJRJ) and isometric mid-thigh pull (IMTP). Trivial to small differences were observed in CMJ jump height, CMJ …

Effect Of Relative Age On Gross Motor Coordination Development, Considering Biological Maturity And Sex, Xiaoyu Zhang, Gaël Ennequin, Anthony J. Blazevich, Sébastien Ratel

Research outputs 2022 to 2026

Objective: This study aimed to investigate the effect of relative age on gross motor coordination (GMC) development, taking into account biological maturity and sex. Methods: 729 participants aged 10 to 16 years completed three GMC tests newly designed to minimize the potentially confounding effects of physical fitness. The tests included a Hand-Foot coordination test, Dribbling-Targeting test (DT test), and a T balance and agility test (T test). Relative age was determined using birth quartiles: BQ1 (January–March); BQ2 (April–June); BQ3 (July–September); and BQ4 (October–December). Regarding biological maturity, the participants were categorized according to their estimated peak height velocity (pre- and post-PHV). …

Empowering Optimal Operations With Renewable Energy Solutions For Grid Connected Merredin Wa Mining Sector, Md Ohirul Qays, Ravi Kumar, Minhaz Ahmed, Stefan Lachowicz, Uzma Amin

Research outputs 2022 to 2026

Mining sectors require a continuous and reliable power supply; however, reliance on traditional grid utilities results in high costs and disruptions and increases extreme carbon emission. The Merredin WA sector seeks to resolve critical energy challenges affecting mining operations in Western Australia. Thus, this research proposes an optimal solar PV system with battery storage and backup generation for the mining sector to ensure a stable and cost-effective power supply that reduces harmful environmental effect. A hybrid data-driven long short-term memory (LSTM)-classical optimization framework is designed here, thereby optimizing PV-battery storage operational cost savings and energy usage. The optimization results indicate …

Strength And Conditioning Society (Scs) 7th Annual Meeting, Murcia, Spain, 2024, Pedro E. Alcaraz, Konstantinos Spyrou, Anthony J. Blazevich, Tomás T. Freitas, Elena Marín-Cascales, Aarón Manzanares Serrano

Research outputs 2022 to 2026

On behalf of the Strength and Conditioning Society (SCS), we are pleased to present the abstracts submitted for the SCS 7th Annual Meeting. The event was held at the Universidad Católica de Murcia (UCAM) headquarters in Murcia, Spain, on 9–11 October 2024, and comprised several invited sessions by international and national speakers on a variety of topics related to biochemistry and exercise physiology, strength and conditioning practices and their application to health, injury prevention, and sports performance. These included strength training in high-performance sports, sport science and training–competition load management in elite environments, biochemistry and exercise physiology and prescription, nutrition …

Experimental Study Of Process Parameter Effects On Internal Defects In Titanium Coaxial Wire-Based Laser Metal Deposition, Remy Mathenia, Braden Mclain, Todd Sparks, Frank Liou

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Wire-based laser metal deposition is an additive manufacturing process that can be used in the efficient manufacturing of complex structures. This paper utilizes a three-beam coaxial laser wire system to explore the effect of process parameters on the resultant deposition density. The reduction in or elimination of defects is important to the mechanical properties of the additively manufactured material and the widespread adoption of additive manufacturing processes. In this work, two-bead-wide walls were deposited under varying experimental conditions, including the traverse feed rate and workpiece illumination proportion. A method for calculating the bead pitch and layer height increment based on …