Scholarworks
ScholarWorks is an open access repository for the capture of the intellectual work of Montana State University (MSU) in support of its teaching, research and service missions. MSU ScholarWorks is a central point of discovery for accessing, collecting, sharing, preserving, and distributing knowledge to the Montana State University community and the world.
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Ice-templated ceramic-metal composites modified by interfacial metal aluminates
(Montana State University - Bozeman, College of Engineering, 2024) Marotta, Amanda Rose; Chairperson, Graduate Committee: Stephen W. Sofie; This is a manuscript style paper that includes co-authored chapters.
Interpenetrating phase (3-3) composites consists of two phases which are fully percolating throughout one system. Research efforts have been made towards routes to fabricate these composites that will allow for them to be utilized for applications like heat spreaders and leading-edge parts. Freeze-tape casting offers a potential avenue for developing 3-3 composites. The system can exhibit complete, long-range alignment through freeze-tape casting, in which both phases of the composite will be in constant periodicity of one another. To explore the potential of such ordering in 3-3 composites, ceramics, such as, yttria- stabilized zirconia (YSZ), alumina (Al 2 O 3) and zirconium diboride (ZrB 2) were freeze-tape casted and sintered to allow for second phase incorporation. Second phases, like copper (Cu) and silicon carbide (SiC) were utilized, so that ceramic-metal (cermet) freeze-tape casted composites and ultra-high temperature ceramic (UHTC) freeze-tape casted composites could be characterized. Initial composite property predictions were made using rule of mixtures (ROM). The work contained in this dissertation demonstrates that freeze-tape casted 3-3 composites can exhibit novel 3-axial anisotropic thermal behavior, and that, by ordering the percolating phases, high-temperature thermal behavior may be enhanced. This work, also, demonstrated that ceramic-metal interfaces are fragile, exhibiting thermal stress at the interface upon thermal cycling. Fostering interfacial adhesion between metal and ceramic phases is a primary tool for manipulating cermet properties. Common approaches to ceramic-metal joining include metallization and active brazing techniques. Though improvements in mechanical properties are notable, the functional capabilities can be sacrificed. To overcome these limitations, a novel approach, via a metal aluminate (copper aluminate), has been utilized to alleviate thermal stress along a ceramic-metal interface, and maintain adhesion of the ceramic-metal up to 100 psi. Mechanistically, it was not well- understood, as to what role copper aluminate played in modifying ceramic-metal interfaces. Chapter 5 of this work elucidates copper aluminate's role in fostering a ceramic-metal interface. By analyzing the surface and cross-sectional features of the cermet, it is discovered that through the formation of copper aluminate, porosity/roughness occurs to the bulk ceramic, allowing avenues for the metallic phase to penetrate through the thickness, fostering a mechanical interlocked joint.
Implementation of the patient health questionnaire- 2 & 9 adolescent modified [PHQ-2 & 9 A] in a pediatric clinical setting: a quality improvement project
(Montana State University - Bozeman, College of Nursing, 2024) Mock, Devin Michael; Chairperson, Graduate Committee: Julie Ruff; This is a manuscript style paper that includes co-authored chapters.
In Montana, the importance of pediatric depression screening within the pediatric primary care setting cannot be overstated, mainly due to the state's high prevalence of pediatric depression and unique rural challenges. Pediatric primary care is often the first line of defense in identifying and addressing mental health issues in children and adolescents. In such a vast and predominantly rural state, primary care providers play a crucial role in early detection and intervention, overcoming barriers such as limited access to specialized mental health services and cultural stigmas. Effective screening and early intervention strategies immediately benefit the child's mental health and contribute to long-term positive academic and social development outcomes. Integrating mental health services into primary care is essential for improving healthcare outcomes. The American Academy of Pediatrics' current guideline recommends that all children 12 years and older receive annual depression screening using a validated and reliable tool such as the Patient Health Questionnaire- 2 & 9 Adolescent Modified [PHQ-2 & 9 A]. Unfortunately, at an urban Montana pediatric primary care clinic, the number of pediatric patients receiving appropriate screening is below sub-optimal. A Plan, Do, Study, Act cycle was implemented throughout the clinic to increase pediatric depression screening rates through education, reminder-based systems, and standardized hand-off reports.
Spectral processing for algae monitoring and mapping (SPAMM): remote sensing methodologies for river ecology
(Montana State University - Bozeman, College of Engineering, 2024) Logan, Riley Donovan; Chairperson, Graduate Committee: Joseph A. Shaw; This is a manuscript style paper that includes co-authored chapters.
Inland water quality is a growing concern to public health, riparian ecosystems, and recreational uses of our waterways. Many modern water quality programs include measures of the presence and abundance of harmful and nuisance algae. In southwestern Montana, large blooms of the nuisance algae, Cladophora glomerata, have become common in the Upper Clark Fork River due to a combination of warming water temperatures, naturally high phosphorus levels, and an influx of contaminants through wastewater and anthropogenic activity along its banks. To improve understanding of bloom dynamics, such as algal biomass and percent algae cover, and their effects on water quality, a UAV-based hyperspectral imaging system was used to monitor several locations along the Upper Clark Fork River. Image data were collected across the spectral range of 400 - 1000 nm with 2.1 nm spectral resolution during field sampling campaigns across the entirety of the project, beginning in 2019 and ending in 2023. In this dissertation, methodologies for monitoring water quality were developed. These methods include estimating benthic algal pigment abundance using spectral band ratios achieving R 2 values of up to 0.62 for chlorophyll alpha and 0.96 for phycocyanin; creating spatial algae distribution maps and estimating percent algae cover using machine learning classification algorithms with accuracies greater than 99%; combining spatial algae distribution maps and improved pigment estimation using machine learning regression algorithms for creating chlorophyll alpha abundance maps, achieving an R 2 of 0.873, while also comparing abundance values to Montana water quality thresholds; and identifying salient wavelengths for monitoring and mapping algae to inform the design of a low-cost and compact multispectral imager. Throughout all field campaigns, significant spatial variations in algal growth within each river reach and frequent violations of current water quality standards were observed, demonstrating the need for high-spatial resolution monitoring techniques to be incorporated in current water quality monitoring programs.
Decreased time-to-treatment delay through clinical guideline implementation for image-guided image biopsies in cancer diagnosis
(Montana State University - Bozeman, College of Nursing, 2024) O'Dell, Meghan Marie; Chairperson, Graduate Committee: Molly Secor; This is a manuscript style paper that includes co-authored chapters.
Background: International guidelines have been established defining the ideal period from referral to diagnosis of malignancy as two weeks. Increased time-to-treatment initiation is associated with a one to three percent increased mortality risk for each week of delayed treatment. Image-guided biopsy has emerged as a transformative tool in cancer diagnosis, impacting the rapid identification and treatment of malignancy. Clinical Problem: A rurally based oncology institute associated with a larger non-profit healthcare system in Montana identified concerns with extended time-to-treatment initiation related to delayed image-guided biopsy. The average wait time for image-guided biopsy was sixty-seven days. Methods: Utilizing the Replicating Effective Programs (REP) Implementation framework, an evidence-based clinical practice guideline was developed to define optimal referral-to-diagnosis timeframe for diagnosis or rule-out of malignancy via image-guided biopsy using the second edition of the Appraisal of Guidelines for Research and Evaluation (AGREE II) tool. Interventions: A guideline advisory committee including individuals from relevant professional groups was recruited to act as expert appraisers. Four-phase appraisal of the clinical practice guideline using the AGREE II tool took place over six weeks. The guideline was rated for overall quality based on a seven-point rating scale and appraisers were asked if they would recommend the guideline for use in the target facility. Results: The guideline received an average rating of 6.2 and was recommended for use by 100% of appraisers, with 18% recommending modifications during pre-implementation. During implementation, the guideline received an average rating of 6.7 and was recommended for use by 100 % of appraisers. The final guideline and appraisal data were presented to health system leadership and the guideline was successfully adopted into facility policy. Conclusion: Quality improvement initiatives will need to be implemented to identify and address systems-based complexities that could pose barriers to meeting the goal timeframe as defined by the guideline.
Hold fast: cultural resilience in the face of climate change
(Montana State University - Bozeman, College of Arts & Architecture, 2024) LaCalle, John Christian; Chairperson, Graduate Committee: Hugo R. Sindelar
The Cajun Prairie of South Louisiana offers a distinctive lens through which to view the resilience, spirit, identity, and culture of a regional community that is under threat by the impacts of climate change and unsustainable development. Hold Fast explores and captures these struggles using documentary storytelling techniques through the lens of an emblematic subculture in southwest Louisiana in the McNeese State University Rodeo Team. The film presents the challenges of living within a changing climate as the team rebuilds after Hurricane Laura ravaged southwest Louisiana and uprooted their lives in 2020. The short film showcases that in a time of upheaval and widespread displacement, strong cultural identity becomes critical to a community's ability to rebound after disaster. By highlighting the McNeese Rodeo team's journey against the backdrop of Cajun Prairie's challenges, this project seeks to illuminate the interconnectedness of human and environmental stories, showcasing the unwavering spirit of the Cajun community.