Digital Commons Network^™

Villain Or Victor, Part Ii: Embodied Advocacy In A Time Of Democratic Turmoil, Kenesha Johnson, Theodore W. Anderson

South Carolina Association for Middle Level Education Journal

This paper examines how middle level educators embody advocacy through movement, care, rest, and recreation as acts of democratic engagement. Extending Part I of Villain or Victor, it positions advocacy as a lived, physical, and relational practice grounded in wellness and cultural responsiveness. Through embodied pedagogy, healing-centered approaches, and intentional recreation, educators help young adolescents experience democracy through motion, connection, and collective courage. The paper links theory to practical strategies that build sanctuaries of belonging, support student voice, and nurture civic leadership in the middle grades.

Press Play! Integrating Gamified Tools Into Web- Based Formative Social Studies Assessments, Victoria L. Pierce

South Carolina Association for Middle Level Education Journal

In an increasingly technology-dependent world, middle school students are emergent experts in technology use although novices in content knowledge. Middle school social studies teachers have dual issues of relevance and rigor to balance in their instruction with students at this developmental level. To strengthen students’ historical reasoning skills, middle school social studies teachers can implement gamified learning in a variety of ways to make use of technology skills and interests of students while also meeting content standards. This research models integration of gamified assessment into a virtual learning environment featuring educational games from organizations such as iCivics and Next Gen …

Understanding Distracted Minds: A Review Of Stolen Focus, Tammy J. Burnham Dr.

South Carolina Association for Middle Level Education Journal

This review examines Hari's Stolen Focus: Why You Can't Pay Attention—and How to Think Deeply Again, an exploration of society's lack of sustained attention in an increasingly digital world. Hari's investigation of technology's impact on cognitive abilities provides meaningful insights for those in the educational field, where educators must guide young people through social media environments. Hari argues that systemic forces are disabling attention spans, and he evaluates practical solutions for educators and parents. Stolen Focus is an important resource for educators committed to supporting students' cognitive development and mental well-being.

Front Matter

South Carolina Association for Middle Level Education Journal

No abstract provided.

Scamle Journal 2026 Full Volume

South Carolina Association for Middle Level Education Journal

No abstract provided.

Impact Of Suaahara, An Integrated Nutrition Programme, On Maternal And Child Nutrition At Scale In Nepal, Edward A. Frongillo Jr. Ph.D., Shalini Suresh, Deependra K. Thapa, Kenda Cunningham, Pooja Pandey Rana, Ramesh P. Adhikari, Subir Kole, Bhim Pun, Indra Kshetri, Debendra P. Adhikari, Rolf Klemm

Faculty Publications

Suaahara was an innovative, complex, multi-sectoral, large-scale, nutrition programme in Nepal to increase exposure to nutrition-related information and services, improve nutrition-related knowledge and practices among pregnant women and mothers of infants and young children, and improve their nutrition. This study evaluated the effectiveness of Suaahara to improve nutrition and nutrition-related practices by comparing changes over 10 years between intervention and comparison districts. The samples of households at baseline in 2012 and endline in 2022 were 2040 and 2480, respectively, from 120 old wards. The impact was estimated using intent-to-treat regression models in which survey year, arm and their interaction were …

Exposure To Suaahara Ii Interventions And Knowledge Of Maternal And Child Nutrition And Health Among Mothers, Grandmothers, And Male Household Heads: An Association Study In Nepal, Shalini Suresh, Edward A. Frongillo Jr. Ph.D., Deependra K. Thapa, Ramesh P. Adhikari, Subir K. Kole, Femila Sapkota, Manisha Laxmi Shrestha, Kristine Garn, Pooja Rana Pandey, Indra Kshetri, Dipak Sharma, Kenda Cunningham

Faculty Publications

Suaahara was a USAID-funded multi-sectoral integrated nutrition program that aimed to improve the nutritional status of children under the age of five and their mothers in Nepal. The program included multiple interventions targeted to mothers and children, as well as other caregivers. Caregiver knowledge of optimal nutrition and health practices among household members is an important driver of healthy child and maternal nutrition behaviors. This study investigates the associations between exposure to Suaahara interventions and knowledge of maternal and child nutrition and health practices among mothers (n =, grandmothers (n =, and male household heads (n =. Linear and logistic …

Fuck: Public Opinion, Ian T. Adams, Marc Olson, Lois James, Brandon Tregle, Hunter M. Boehme

Faculty Publications

Profanity is common in everyday life, yet law enforcement often treats all swear words alike. Building on Adams (2024), we surveyed a large public sample (n = 2412) who evaluated profanity’s appropriateness, professionalism, impact on trust, and disciplinary deservedness across nine scenarios (n = 9874) varying in intent (positive, neutral, derogatory) and target (self/situation, colleague, public). Results aligned with prior research: any profanity aimed at the public, especially in a derogatory way, drew the strongest condemnation. Meanwhile, positive or neutral profanity toward oneself or colleagues was generally acceptable, though derogatory profanity at colleagues elicited moderate concern. Across the …

Does Genetic Testing Influence Outcomes: Early Experience In Melanoma Case Series, Ryan Reyes, George Skenteris, Stella Coker Watson Self Ph.D., Ms, Christine Marie-Gilligan Schammel, Steven D. Trocha

Faculty Publications

Background:

The treatment and prognosis of melanoma have historically been based on histologic stage and Breslow depth; however, due to the increase in surveillance, melanomas are being identified at an earlier stage and lower Breslow depth. Advances in genetic testing, such as Decision Dx®, mean that melanoma diagnostic decisions and prognosis can now be directed by genetics. The purpose of this project was to assess the influence of a Decision Dx® high-grade (Class 2A/B) classification on the treatment of melanoma patients at a regional medical center, particularly those not deemed high risk by conventional classification methods, including Breslow depth and …

Bridging 2d And 3d Computational Modeling Of Vacuum Arc Remelting: Capturing Rotating Arc Dynamics In Axisymmetric Simulations, Zilong Zhang, Elaheh Dorari, Ramesh Minisandram, Shakarjee Krishnamoorthi, Lang Yuan

Faculty Publications

Computational modeling of the Vacuum Arc Remelting (VAR) process has been developed to provide a deeper physical and metallurgical understanding and assist in the manufacture of defect-free ingots. While fully 3D, time-resolved arc models capture arc–melt interactions with high fidelity, their high computational cost makes 2D steady arc models still the preferred option in industrial applications. In this study, a multi-physics VAR model, which accounts for magnetohydrodynamics, heat transfer, fluid dynamics, and melting/solidification, was established in ANSYS Fluent for Alloy 718 in 3D with a rotating arc. It was validated against measured melt pool morphology. A new 2D axisymmetric oscillating …

Using The Misinformation Exposure-Trust Framework For Audience Segmentation: Predicting Covid-19 Vaccine Hesitancy Among U.S., Jing Zeng, Jinxu Li, Nan Yu, Xi Cui, Anli Xiao Ph.D.

Faculty Publications

This study examines whether individuals’ exposure to and trust in COVID-19 vaccine misinformation can be used to segment audiences and explain variations in vaccine hesitancy and health beliefs. Using k-means clustering, a survey of 819 U.S. college students (March–May 2021) identifies four subgroups based on combinations of high or low misinformation exposure and trust: misinformation-shielded (low exposure, low trust), misinformation-vulnerable (low exposure, high trust), misinformation-resistant (high exposure, low trust), and misinformation-accepting (high exposure, high trust). These subgroups differ significantly in political ideology, vaccine hesitancy, and health beliefs. The misinformation-shielded subgroup reports more liberal views, lower hesitancy, and higher perceived efficacy, …

Egain Tube Memristors Offering Reliable Switching On A Biological Time Scale, Yuriy V. Pershin, Liya Patel, Bapi Bera, Doug Aaron, Stephen A. Sarles

Faculty Publications

Memristive devices have been considered promising candidates for nature-inspired computing and in-memory information processing. However, experimental devices developed to date typically show significant variability and function at different time scales than biological neurons and synapses. This study presents a memristive device comprised of liquid-metal eutectic gallium indium (EGaIn) contained within a mm-scale tube that operates via a bulk, voltage-dependent switching mechanism and exhibits distinct unipolar resistive switching characteristics that occur on a biological time scale (tens of milliseconds). The switching mechanism involves voltage-controlled growth and dissolution of an oxide layer on the surface of the liquid metal in contact with …

The Detection Of Marine Microseismic Activity With The Cuore Tonne-Scale Cryogenic Experiment, D. Q. Adams, C. Aldunio, K. Alfonso, A. Armatol, Frank Avignone Iii, O. Azzolini, G. Bari, F. Bellini, G. Benato, M. Beretta, C. Bucci, J. Camilleri, A. Caminata, A. Campani, J. Cao, C. Capelli, S. Capelli, L. Capelli, J. Capelli, A. Caminata, Et. Al.

Faculty Publications

Vibrations from experimental setups and the environment are a persistent source of noise for low-temperature calorimeters searching for rare events, including neutrinoless double beta (0νββ) decay or dark matter interactions. Such noise can significantly limit experimental sensitivity to the physics case under investigation. Here, we report the detection of marine microseismic vibrations using mK-scale calorimeters. This study employs a multi-device analysis correlating data from CUORE, the leading experiment in the search for 0νββ decay with mK-scale calorimeters, and the Copernicus Earth Observation program, revealing the seasonal impact of Mediterranean Sea activity on CUORE’s …

Rapid Single-Cell Measurement Of Transient Transmembrane Water Flow Under Osmotic Gradient, Hong Jiang, Jinnawat Jongkhumkrong, Y. J. Chao, Qian Wang, Guiren Wang

Faculty Publications

Aquaporins (AQPs) are critical for transmembrane water transport in response to osmotic gradients, but their gating and regulatory mechanisms remain poorly understood. A central challenge is the lack of methods to measure water flow across AQPs from individual cells with the spatiotemporal resolution and sensitivity equivalent to patch-clamp recordings of ion fluxes—a limitation stemming from the electrically silent nature of water flow. Here, we present a novel optical technique—Flow-Induced Fluorescence Increase Velocimetry (FIFIV) based on Laser-Induced Fluorescence Photobleaching Anemometry (LIFPA)—that enables direct, real-time monitoring of cytoplasmic flow induced by transmembrane water transport under osmotic pressure gradients. Using small molecular fluorescent …

Translating Community Voices To Build Meaningful Engagement: A Community Health Worker Led Study, Lauren Workman, Julie Smithwick Msw, Chw, Kimberly C. Rawlinson, Mark M. Macauda, Lashandra Morgan, Whitney Davis

Faculty Publications

Background: Understanding community perspectives on barriers and facilitators of meaningful engagement, equitable decision making, and sustainable community improvement is critical for advancing health equity. Community Health Workers can make significant contributions to research teams, as they are bridges into communities and bring unique perspectives. This study describes community voices on barriers to authentic engagement and insights on strategies to build trust, as well as the way in which these data were translated into a tangible assessment tool and a community-facilitated learning academy.

Methods: A team of Community Health Workers led a series of 24 ‘open mic’ discussions in four South …

The Effect Of St. John’S Wort Solution On Climbing Activity Reflecting Depressive-Like Behavior In Drosophila Melanogaster To Model Seasonal Depression In Low Sunlight Exposure, Madison Simon

Journal of the South Carolina Academy of Science

Although depression is a known substantial threat to public health, seasonal affective disorder (SAD) is under-researched. SAD refers to recurrent seasonal patterns of depression. This depressive disorder has few accepted treatments. The purpose of this study was to test whether St. John’s Wort (SJW), a natural supplement with researched antidepressant properties, could be a cheaper alternative with fewer limitations for treating SAD. SJW’s efficacy as a seasonal depression inhibitor was tested through a Drosophila depression-like model using climbing activity to reflect depressive behavior. It was hypothesized that as the concentration of SJW solution increases, the climbing activity of stressed Drosophila …

Digital Twin Enabled Robot Collision Detection Using Time Series Forecasting, Fadi El Kalach, Mojaba A. Farahani, Philip Samaha, Thorsten Wuest, Ramy Harik

Faculty Publications

The advent of Industry 4.0 has reshaped modern manufacturing, driven by breakthroughs in cutting-edge technologies. A key example is the widespread deployment of sensors, which capture and transmit large volumes of operational data. This data surge has fueled the development of advanced Artificial Intelligence (AI) applications, enhancing manufacturing intelligence and efficiency. A key enabler of such intelligence is Time-Series Forecasting (TSF), which leverages historical data to predict future trends and events, thereby providing actionable insights for proactive decision-making. In parallel, Digital Twin (DT) technology has gained significant prominence due to its capacity for bidirectional communication with physical manufacturing systems, enabling …

Partial Mitochondrial Genome Of The Enigmatic Bermuda Fireworm Odontosyllis Enopla Verrill, 1900 (Annelida, Syllidae, Eusyllinae) And Its Phylogenetic Implications, Lynette D. Wyant, Brendan A. Cruz, Aydanni D. Gonzalez, Joshua M. Kovalcik, Maria A. Carolus, Lauren C. Hutto, Hope Chutjian, Jude C. Roman, Anneau Cappelmann, John J. Ankney, Aidan Popp, James B. Wood, D. Tye Pettay, Mercer R. Brugler

Natural Sciences Faculty Publications

The Bermuda fireworm, Odontosyllis enopla Verrill, 1900, is a marine polychaete that displays a unique bioluminescent mating ritual. Despite the first sighting of O. enopla more than 534 years ago, molecular data have been limited. Several syllid mitogenomes are currently available; however, there are only three published genes for O. enopla: two partial mitochondrial genes (16S [508 bp] and cox1 [653 bp]; 1,161 bp total) and one partial nuclear gene (18S [1,339 bp]). This study bioinformatically mined previously published transcriptomes of O. enopla for mitochondrial reads and subsequently assembled and annotated a partial mitochondrial genome (10,172 bp). The partial mitogenome …

Survival On Image Regression With Application To Partially Functional Distributional Representation Of Physical Activity, Rahul Ghosal, Sunwoo Emma Cho, Marcos Matabuena

Faculty Publications

Technological advancements in wearable devices and medical imaging often lead to high-dimensional physiological signals in the form of images or surfaces. To address these data structures, we develop a novel survival on image regression model with a specific focus on partially functional distributional representation of wearable data. The existing approaches for functional data and survival outcomes have been primarily developed for uni-dimensional functional predictors. Drawing on recent developments in distributional data analysis, we model temporally varying distributional patterns of physical activity (PA) as a partially functional distributional predictor within a semiparametric Cox model framework. We use tensor product splines to …

Evaluation Of The Consistency Of A Speech Verification System With Human Raters In Early Literacy Screening Assessments, Yaacov Petscher, Jennifer O'Sullivan, Hugh W. Catts, Ashley Edwards, Lisa Fitton Ph.D., Ccc-Slp

Faculty Publications

This study investigates the use of a speech verification system (SVS) technology, a form of automatic speech recognition (ASR), in the assessment of children's reading skills. Despite the growing integration of ASR systems in educational assessment, significant challenges persist, particularly due to the acoustic, pronunciation and dialectal variability inherent in children's speech. Our research evaluated the consistency between human rater (HR) and speech verification system (SVS) scores produced from SoapBox Labs across three linguistic tasks—phoneme blending, expressive vocabulary and word reading. Results reveal variability in agreement rates, with SVS showing lower consistency with human raters in phonologically complex tasks like …

Evaluation Of The Consistency Of A Speech Verification System With Human Raters In Early Literacy Screening Assessments, Yaacov Petscher, Jennifer O'Sullivan, Hugh W. Catts, Ashley Edwards, Lisa Fitton Ph.D., Ccc-Slp

Faculty Publications

This study investigates the use of a speech verification system (SVS) technology, a form of automatic speech recognition (ASR), in the assessment of children's reading skills. Despite the growing integration of ASR systems in educational assessment, significant challenges persist, particularly due to the acoustic, pronunciation and dialectal variability inherent in children's speech. Our research evaluated the consistency between human rater (HR) and speech verification system (SVS) scores produced from SoapBox Labs across three linguistic tasks—phoneme blending, expressive vocabulary and word reading. Results reveal variability in agreement rates, with SVS showing lower consistency with human raters in phonologically complex tasks like …

International Society Of Sports Nutrition Position Stand: Effects Of Dietary Antioxidants On Exercise And Sports Performance, Drew E. Gonzalez, Broderick L. Dickerson, Brandon M. Roberts, Jennifer A. Kurtz, Adam M. Gonzalez, Matthew J. Mcallister, Jeffrey L. Heileson, Richard J. Bloomer, Shawn M. Arent, Darren G. Candow, Jeffrey R. Stout, Karen A. Hecht, Bill Campbell, Chad M. Kerksick, Douglas Kalman, Jose Antoino, Richard B. Kreider

Faculty Publications

Following a comprehensive review, the International Society of Sports Nutrition (ISSN) has developed an official position on the role of dietary antioxidants in exercise and sport. Antioxidants play a complex, context-dependent role in vivo; they can facilitate recovery from exercise but may also hinder training adaptations when consumed at supraphysiological doses. While endogenous antioxidant systems can effectively maintain redox balance, dietary sources, particularly whole foods, can help mitigate excessive oxidative stress following intense/heavy training or inadequate recovery. The influence of dietary antioxidants depend on timing, dosage, type, and individual factors. The ISSN’s official position encompasses the following: (1) Redox balance …

Limit Theorems For Andrews’ Restricted Overpartitions, Tapas Bhowmik, Alex Cao, Jack Frew, John Lehman, Wei-Lun Tsai

Faculty Publications

The study of overpartitions in recent years has been used to great effect in various fields, including hypergeometric series, q-series identities, and mathematical physics. We investigate the limiting distributions of the number of parts in a family of overpartitions of n,  introduced by Andrews, where parts are counted with two different weights. Using Andrews’ identities and the saddle-point method, we establish two central limit theorems (CLTs) for the number of parts as n → ∞, corresponding to these weightings. We also derive explicit formulas for the mean and variance in each case.

Assessing Working Musicians’ Perspectives Of Need And Barriers Regarding Lay Harm Reduction Efforts For Substance-Related Harm In South Carolina, Sarah Grace Frary

Faculty Publications

Background

Harm Reduction (HR) approaches applied to substance use aim to decrease the toxic consequences of overdose. The addition of xylazine and benzodiazepines to fentanyl, the primary opioid in the US drug supply, increases the likelihood of overdose. Likewise, adding fentanyl to other popular substances, such as cocaine and methamphetamine, has further driven the exponential increase in opioid and stimulant overdoses. Engaging lay community members in HR efforts may help to combat the overdose crisis. Substance use is common in live music settings, and working musicians may be uniquely positioned within “the scene” – individuals who populate specific cultural niches …

Physical And Behavioral Health Diagnoses And Comorbidities Associated With Transition From Military Health System To Veterans Health Care Among Post-9/11 Veterans, Niki Wooten Phd, Lisw-Cp, Megan E. Amaun, Madeleine Myers, Prince N.O. Addo, Jeffrey Bowers, Felicia R. Carey, Rudolph P. Rull, Edward J. Boyko, Nathaniel Bell Ph.D., Ana Lopéz-De Fede, Mary Jo V. Pugh

Publications

Objective

To identify factors associated with transitioning from Military Health System (MHS) to Veterans Health Administration (VHA) care in post-9/11 veterans.

Study Setting and Design

Retrospective cohort study from the Long-Term Impact of Military-Relevant Brain Injury Consortium Phenotype Study.

Data Sources and Analytic Sample

Population-level data were analyzed from MHS and VHA electronic health data (FY2000-2020). Participants received ≥ 3 years of MHS care and separated from the military before October 1, 2016. The primary outcome was transition from MHS to VHA care after military separation. Covariates included demographic, military, and deployment characteristics at military separation; physical, mental, and substance …

Artemisinin Partial Resistance Mutations In Zanzibar And Tanzania Suggest Regional Spread And African Origins, 2023, Sean V. Connelly, Julia G. Muller, Mohamed Ali, Billy E. Ngasala, Wahida Hassan, Bakari Mohamed, Kyaw L. Thwai, Jacob M. Sadler, Jacob Marglous, Abebe A. Fola, Abdallah Zacharia, Shija J. Shija, Safia Mohammed, Dominick C. Msolo, Hamza Said, Editruda E. Peter, Melic Odas, Isaack J. Rutha, Mwanaidi Nwange, Karamoko Naire, Shazia Ruybal-Pesántez, Robert Verity, Rebecca Crudale, Varun Goel, Barbara B. Choloi, Anders Björkman, Jeffrey A. Bailey, Jessica T. Lin, Jonathan J. Juliano

Faculty Publications

Artemisinin partial resistance, driven by Plasmodium falciparum K13 mutations, threatens malaria control. Zanzibar is vulnerable to artemisinin partial resistance spread but lacks recent molecular surveillance. We sequenced samples in Zanzibar and mainland Tanzania collected from 2022 to 2024. K13 mutations were found in 2 of 1440 participants (P441L, A675V) in Zanzibar and 6 of 3762 (R561H, P441L) in mainland Tanzania. Based on whole genome sequencing data, K13 mutations appear to be of African origin with regional spread. Frequent parasite importation appears to maintain partner drug mutation frequencies similar to the mainland, where artemether-lumefantrine selects for mutations favoring artesunate-amodiaquine sensitivity. Ongoing …

Integrating Future Factory-To-Factory (F2f) Manufacturing Through System Of Systems Engineering (Sose): A Framework For Capability Beyond Constituent Systems, Polinpapilinho F. Katina, Hengtao Tang Ph.D., Anouar Hallioui

Faculty Publications

System of Systems Engineering (SoSE) is an emerging discipline focused on the design, integration, and evolution of metasystems—composed of multiple autonomous yet interdependent systems. These systems of systems (SoS) offer capabilities that exceed those of any individual constituent systems by enabling synergistic coordination, interoperability, and dynamic adaptation across diverse operational contexts. This study pursued three primary objectives: (i) to examine the role of integration in enabling emergent capabilities beyond those of individual systems, (ii) to explore SoSE as a framework for orchestrating Future Factory-to-Factory (F2F) Manufacturing, and (iii) to assess the implications of SoSE to address volatile, uncertain, complex, and …

Intravascular Ultrasound Is More Accurate Than Angiography In Arteriovenous Vascular Access Lesions, James W. Decker, Dima Banihani, Curtis Honshideler, Saran Lotfollahzadeh, David Jasen Wu Wong, Alik Farber, Jeffrey J. Siracuse, Najia Idrees, Laura Dember, Mohammad Bader, Suvranu Ganguli, Vijaya Kolachalama, Tarek Shazly

Faculty Publications

Background:

Conventional angiography remains the standard diagnostic modality for arteriovenous (AV) access dysfunction in hemodialysis patients, but its geometric accuracy is limited. Intravascular ultrasound (IVUS) offers superior lesion detection, yet its absolute measurement accuracy remains uncertain. Using three-dimensional (3D) printed vascular conduits as reference standards, we assessed the accuracy of IVUS versus angiography, hypothesizing that complex conduit geometry, quantified by Gaussian curvature, would exacerbate angiographic error.

Methods

Clinically relevant AV access geometries were modeled with computer-aided design (CAD) and fabricated using 3D printing. Lumen diameters were measured by contrast angiography and IVUS and compared with CAD dimensions. Conduit geometry was …

Asian Reference Values For Handgrip Strength, Gait Speed, Five-Times-Sit-To-Stand Test, Muscle Mass And Calf Circumference, Jozo Grgic, Siew Ling Tey, Dieu Thi Huynh, Yen Ling Low, Zeljko Pedisic, Nina Schaller, Vanessa Kristina Wazny, Weilan Wang, Yasuhiko Saito, Ravindra P. Rannan-Eliya, Hala Ghattas Ph.D., Monique Chaaya, Carlos Mendes De Leon, Preeti Gupta, Ecosse L. Lamoureux, Mythily Subramaniam, Edimansyah Abdin, Rahul Malhotra, Angelique Chan, Bayasgalan Tumenbayar, Et. Al.

Faculty Publications

Background:

Handgrip strength, gait speed, Five-Times-Sit-to-Stand Test (FTSST) performance, skeletal muscle mass and calf circumference are important health outcomes, particularly useful for diagnosing sarcopenia. The aim of this study was to establish reference (normative) values for handgrip strength, gait speed, FTSST performance, skeletal muscle mass and calf circumference by pooling individual participant data from national cohorts in Asia.

Methods:

We conducted a pooled analysis of individual participant data from 20 national cohorts representing 12 Asian countries (China, India, Indonesia, Israel, Japan, Lebanon, Malaysia, Mongolia, Philippines, Republic of Korea, Singapore and Sri Lanka). We included cohorts with data on at least …

Structural And Mechanical Properties Facilitate Shock Wave Damping By Helmet-Like Orbital Hoods In Snapping Shrimp, Mia Kazel, Rebekah E. Cammack, Alexandra C.N. Kingston, Ahmed A. Alshareef, Tarek Shazly, Daniel Isaac Speiser

Faculty Publications

Snapping shrimp damp the shock waves they produce and use as weapons with a helmet-like structure termed the orbital hood. Here, we ask how structural and material properties contribute to shock wave damping by orbital hoods in Alpheus heterochaelis. Using tensile mechanical testing, we find orbital hoods are approximately half as stiff as carapace and have twice the capacity for viscous energy dissipation. Microstructural features probably contribute to tissue-specific mechanical properties: the endocuticles of orbital hoods have almost twice as many lamellae as those of carapaces despite being half as thick, suggesting a mechanism for enhanced material mobility underlying …