28360 research outputs found
Sort by
Investigation of 2D polymer thin films in 3D structures involving Crumpling, Origami, Kirigami and Adhesion
No full textThis dissertation delves into the fascinating world of thin films and their ability to transform into three-dimensional (3D) structures. One can simply crush a sheet of paper into a ball to make a 3D object a faster, yet more complex structure or by following a more organized folding technique (Origami) to create 3D objects with predictable structures. This dissertation mainly focuses on such 3D structures and introduces cuts (Kirigami) and adhesion to those 3D structures to understand more of their mechanical behavior.
The investigation of polymer crumple mechanics by introducing the Kirigami approach, and exploring how the sheet's topology influences crumpling, is discussed in this dissertation, which employs confocal microscopy, force experiments, and molecular dynamics simulations to investigate the effects of cutting on the behavior of crumpled sheets. The findings reveal that cutting does not significantly alter the compressive behavior; force scales according to a power law regardless of cuts, with only minor reductions in magnitudes.
The second chapter of this dissertation studies Origami-inspired adhesive capable of securely holding objects on a wall yet easily removable without damage, which should withstand significant forces when attached, and then swiftly transition to a low-adhesion state for removal. Bi-stability of the proposed Origami designs with different compliance to achieve noticeable switching ratios has been investigated. These devices demonstrate moderate switching ratios and scalability, offering the potential for arrayed applications through repetition of the Origami pattern.
Crumples combined with adhesion create stable 3D structures made from elastic thin sheets. The last chapter discusses the impact mitigation of such crumpling systems by observing sticky crumpled matter subjected to simple ball drop tests. These findings highlight the potential utility of sticky crumples as replacements for intricate engineered structures in protective layers
Semantic enrichment of database columns using generative language models for advanced query searches
Get PDFThis study introduces a novel application of natural language generation (NLG) models to improve database table retrieval. Unlike previous works primarily utilizing embeddings and natural language processing (NLP) models, this work explores using NLGs to generate database column descriptions to enhance search accuracy. The evaluation involves two main aspects: firstly, assessing the accuracy of AI-generated column descriptions compared to ground truth descriptions; secondly, examining the impact of these descriptions when integrated into existing search models to evaluate accuracy improvements. Results indicate improved semantic alignment when comparing generated descriptions to ground truth over column names alone and improved scores for established work
Application of image based finite element analysis for mechanical characterization of materials processed by direct energy deposition technology
Get PDFThe main focus of this study is to analyze the elastic properties of two different additively manufactured materials. To this end, a cobalt chromium (CoCr) metal alloy sample and a tungsten carbide-17% cobalt (WC-17Co) cermet specimen were both fabricated by the direct energy deposition (DED) process and were examined in this study. A comparative study between the results obtained from the application of numerical and analytical techniques versus the experimental results could show the accuracy of these techniques for estimation of elastic properties of the samples. A conventionally manufactured CoCr alloy and WC-17Co samples with similar composition was subjected to the same analysis for the purpose of validation of the results. The object oriented finite element analysis (OOF) technique provided acceptable results for the DED processed CoCr sample, but was unsuccessful in the estimation of the elastic behavior of WC-Co DED sample due to its inhomogeneous microstructure
Wondering About Future Unknowns: An Exploration of Major-Related Influences Impacting College Student Career Attitudes
No full textThe research presented in this disquisition examines how college experiences shape career attitudes. The dissertation explores major-related support systems, the influence of parental education level, and the validation of career attitudes measurement. The first article highlights the positive impact of major-related support systems on career attitudes, particularly for first-generation students. The second article validates items for the ACREO career attitudes scale, stressing the need for thorough measurement. The third article examines wonder pedagogy's transformative role, emphasizing themes of community and exploration. The findings suggest a potential shift to Kegan's self-authorship stage in doctoral participants, emphasizing vulnerability, exposure to diverse identities, and a desire for societal impact in career development. The findings emphasize the crucial role of academic and co-curricular activities, such as building community, exploration, and networking, in shaping career attitudes. It underscores the importance of addressing support systems and major choices as well as integrating various forms of capital in program development. The analysis discusses avenues of future research as well as inform evidence-based decisions for programmatic and institutional development in shaping meaningful career pathways for students
24/7 Stadiums: Their Impact on Local Communities
Get PDFThis disquisition focuses on the ways in which a plausible stadium can be operated 24 hours a day, 7 days a week. With there being no such thing as a ?24/7 stadium?, research was conducted through case studies, data collection, and schematic designs to see if this new type of stadium can have a positive impact on the local community surrounding it. The reason for this type of stadium is that stadiums typically have limited functionality that hinders the community in developing other developments that may benefit them more directly than a stadium would. With that in mind, a stadium that works 24/7 may have a better impact than typical stadiums, leading to new possibilities in the future of stadium design. With this disquisition, research has been conducted to prove that these stadiums are possible and have a positive impact on their surrounding communities
Expedition Interim: Projects on a Journey Towards Equity
Get PDFAs systemic local inequities continue to malform cities without official accountability, the options for architectural intervention seem limited. Not many artistic avenues exist to combat issues of unilaterally failing infrastructure; and to address an issue so thickly sown across modern cities may require intervention at an infrastructural scale. Additionally, what?s catalyzing displacement in one neighborhood may be different in another. This thesis explores how we could respond to the nuances of cities like Seattle, Chicago, or New York City. And how can a project have both a practical usage and convey a symbolic stance against inequity by simply being? This thesis proposes temporary installations of projects in various locations, the purpose and use of which can be decided by the everyday public, Non-Governmental Organizations (NGOs), or locally appointed leaders. These projects aim to establish a new layer of public infrastructure which responds to everyone?s shifting needs for space rather than permanently planting projects with narrow solutions
Rise of Melatonin Supplementation: Results, Side Effects, and Concerns
Get PDFThis paper explores the rising interest in melatonin supplements, highlighting their potential
benefits for sleep quality amongst concerns about safety and regulation. While melatonin
naturally regulates sleep-wake cycles, synthetic supplements offer convenience but pose risks
such as interactions with medications and labeling errors. Informed decision-making, including
consulting healthcare professionals, is essential to maximize benefits while minimizing risks.
Despite promising results, further research is needed to fully understand melatonin's effects.
Therefore, a cautious and informed approach is crucial for its effective and safe use in promoting
overall wellness
A New School: Alternative Learning Environments for the Future
Get PDFThe benefits of how educational architecture can leverage outdoor spaces and natural light to enhance learning, and promote sustainable learning is important to study for the future of the education system and how we can enhance our children?s future. Research will explore existing studies, analyze quality and subpar current projects, and explore additional sustainable factors that can help the educational environment. This research introduces a better understanding of how vital getting students in daylit and outdoor access environments is to shape the future of education and sustainable design
The Intersection of Nature and Knowledge: Red River Valley Science Center
Get PDFThis thesis investigates the establishment of a Natural Science Center in Fargo, North Dakota, as a dynamic hub for informal learning and community engagement. Emphasizing biophilic design, the center integrates natural elements into its architecture and exhibits, creating a space that is not only educational but also health-promoting and psychologically beneficial. The project positions the center as a vital cultural and community hub, fostering a deeper connection between residents and the natural world. It explores how this integration can stimulate learning, enhance community bonding, and reinforce local cultural identity. The study further examines the broader impacts of the center, including societal, economic, and political influences, positioning it as a catalyst for urban development and environmental stewardship. This research aims to conceptualize the comprehensive role of Science Centers in urban environments, focusing on their capacity to enrich personal development, societal engagement, and economic prosperity
In Touch with Prairie Living, July 2024
Get PDFJuly 2024 column for North Dakota and South Dakota newspapers