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Dr. Andrew Straw
No full text2024-2025 recipienthttps://digitalcommons.cedarville.edu/factulty_teaching_effectiveness/1061/thumbnail.jp
Genesis Flood and Tsunami Run-Up: A Study of Zero Water Depth Using the Shallow Water Equations
Full text linkAccurately modeling tsunami run-ups on land has long been a tough assignment in numerical modeling for geophysicists. One of the most critical issues in modeling tsunami wave propagation is representing the behavior of water as its depth approaches zero, particularly at the dynamic boundary between water and dry land (Kristina et al., 2014). The zero water depth condition presents significant numerical errors due to thinning of the water layer, which can lead to instabilities, particle clustering, and numerical diffusion when employing discrete particle methods. Understanding and resolving these challenges is important because it allows for a more realistic simulation of sediment transport and erosion during catastrophic events such as the Genesis Flood (Baumgardner, 2016). Accurately capturing water behavior in wet-dry domains not only contributes to modeling tsunami run-up accurately and the interaction with coastal structures but also deepens our understanding of ancient geological processes that have shaped continental landscapes (Scardino et al., 2022).
This research builds on the foundational work of Dr. Baumgardner, who utilized the MABBUL code to demonstrate that repetitive giant tsunamis generated by catastrophic plate tectonics during the Genesis Flood could plausibly account for the observed sedimentary record (Baumgardner & Navarro, 2023). While Dr. Baumgardner’s work provided evidence of the sedimentary record left behind by such cataclysmic events, it also highlighted the limitations of existing numerical schemes in accurately representing the transition region where water depth tends to near-zero values. Addressing this limitation is the primary focus of our study, which seeks to answer the following question: How does the use of the advanced numerical schemes in tsunami run-up simulation account for scenarios where the water layer thickness approaches zero at the interface between water and dry land? What numerical issues arise from this condition, and what numerical techniques can be developed to overcome the inherent limitations of representing extremely thin layers with discrete particles?
To address these challenges, our study will employ a mesh-based method that effectively tracks discrete particles as they propagate through the computational domain during tsunami events.
We are currently working with an implicit numerical scheme, specifically the Crank-Nicolson method for modeling, to overcome these issues. This implicit approach is chosen for its ability to handle stiff equations that arise in wet-dry conditions and to stabilize the numerical solution in regions where conventional explicit methods fail. Preliminary results from one-dimensional (1D) simulations indicate that incorporating the implicit Crank-Nicolson scheme significantly mitigates the numerical instabilities encountered at the wet-dry land interface. We expect this research to advance our understanding of the major role that tsunamis played in the generation of the sediment record during the Genesis Flood.
References
Baumgardner, J. (2016). Numerical modeling of the large-scale erosion, sediment transport, and deposition processes of the Genesis Flood. Answers Research Journal, 9, 1–24.
Baumgardner, J., & Navarro, E. (2023). (2023). The Role of Large Tsunamis in the Formation of the Flood Sediment Record. Paper presented at the Proceedings of the International Conference on Creationism, , 9(1) 13.
Kristina, W., Bokhove, O., & Van Groesen, E. (2014). Effective coastal boundary conditions for tsunami wave run-up over sloping bathymetry. Nonlinear Processes in Geophysics, 21(5), 987–1005.
Scardino, G., Rizzo, A., De Santis, V., Kyriakoudi, D., Rovere, A., Vacchi, M., Torrisi, S., & Scicchitano, G. (2022). Insights on the origin of multiple tsunami events affected the archaeological site of Ognina (south-eastern Sicily, Italy). Quaternary International, 638, 122–139
2025-2026 Undergraduate Academic Catalog
Full text linkhttps://digitalcommons.cedarville.edu/academic_catalogs/1130/thumbnail.jp
Folded Line: A Site-Specific Textile Installation
Full text linkFolded Line is a site-specific fabric installation made whilst in residence at PADA Studios in Barreiro, Portugal. PADA is located at the former site of Companhia Uniao Fabril (CUF), one of the largest corporations in Portugal that produced a wide range of goods from petrochemicals to carpets from the 1930’s through the 1970’s, employing upmost of 10,000 people. In its prime, it provided housing, schooling, medical care, and a live-in community for its employees. Folded Line runs down a set of monumentally sized steps that once served as stadium seats for company football matches. The dramatic diagonal edge of the steps marks the entrance to the CUF complex.
Made through a process of tracing, mapping, pattern making, and sewing, Folded Line forms a fabric cast of bleached out color running down the steps, mimicking a slice of light cast from an open door at the top of a dark stairway. The sewn line is patchworked together from thrifted shirts, sheets, remnants of old projects, and new yardage sourced from Lisbon. Like dog earring a page in a book or setting a stack of stones to mark a path, the line temporarily demarcates the transitional nature of stairs, occupying a space between architecture, sculpture, and a path made by walking
Diversity of the Harp: A Brief Introduction to the History and Styles of the Harp.
Full text linkThe harp is an instrument that many people recognize, but the history and variety of styles of harps are known by only a few. This presentation will be an introduction to the vast history and diversity of the harp, beginning in Ancient Egypt and leading the modern harp. Through visual representation as well as in depth research on the matter of the history of harp, the depth of the history of the harp, and the harpists who assisted in the development and changes of the harp
Invitation to Cybersecurity
No full textInvitation to Cybersecurity begins with an overview of cyberspace and how computers and the Internet work from 1s and 0s to software, hardware, operating systems, and web browsers. Next the need for cybersecurity is covered by introducing hackers, hacking culture, and the different ways that hackers attack computer systems to gain unauthorized access. This leads to the goals of cybersecurity and the CIA triad: confidentiality, integrity, and availability. Then the text goes into cybersecurity risk management as the high-level approach to allocating scarce resources in order to get the biggest bang for the buck. Next adversarial thinking is introduced as the hallmark of cybersecurity, and game theory basics are covered to sharpen the reader\u27s ability to anticipate the strategic actions of hackers. The text then provides an overview of classical cryptography and how cryptography works in computer systems, including symmetric and public key crypto and hashing. Next access control is addressed with an overview of AAA: authentication, authorization, and accounting. The principles of cybersecurity and best practices are then covered before finally addressing the legal and ethical aspects of cybersecurity.https://digitalcommons.cedarville.edu/cedrus_press_publications/1027/thumbnail.jp
