Digital Commons Network^™

Investigating The Fatigue Behavior Of Inconel 939 And Inconel 718 Through Micromechanical Testing, Mohammad Hossein Shahini

LSU Doctoral Dissertations

A detailed evaluation of fatigue crack growth (FCG) in a silicon-modified Inconel 939 alloy, fabricated via laser powder bed fusion additive manufacturing (L-PBF AM), was performed using cyclic bending tests on pre-notched microscale cantilevers with a cross-sectional dimension of 25 µm × 25 µm. To our knowledge, this study is the first to demonstrate that such microscale cantilever tests can effectively capture both the threshold and Paris-law regimes of FCG, despite the limited specimen size. The precise fabrication of these small-scale specimens allows for controlled fatigue crack propagation relative to the microstructure while minimizing the presence of volumetric defects. Notably, …

A Bump Hunting Approach To Finding Interpretable Data Pockets, Tushar Ojha

Electrical and Computer Engineering ETDs

This dissertation approaches the problem of extracting simple interpretations from local regions of data. This is sometimes called bump hunting because the local regions of interest have a high concentration of a particular output value. This work develops a bump hunting method for discrete-valued tabular data where each bump is modeled by a rectangular region of the input data space so its rule-based description admits a simple logical interpretation that can inform decisions. This method is designed for labeled data where each input feature has a distinct meaning that may or may not be related to the output, and the …

Fedchae: Federated Learning With Client Clustering And Hybrid Adaptive Engagement, Chaeeun Park

Electrical and Computer Engineering ETDs

As machine learning adoption expands, data privacy concerns have grown significantly. Federated Learning (FL) addresses this challenge by allowing clients to train locally and share only their model parameters with the server. However, conventional FL methods such as FedAvg suffer from high communication overhead, as all clients must participate in every global round.

This paper proposes FedChae (Federated Learning with Client Clustering and Hybrid Adaptive Engagement) to balance communication efficiency and model accuracy. FedChae alternates between Grouping Rounds, where all clients perform clustering, and Conventional Rounds, where one client per cluster updates the model.

Simulations with 100 clients using Multi-class …

Improvising Across Abilities: Pauline Oliveros And The Adaptive Use Musical Instrument [Book Review], Maria A. Souliotis

Disability in LIS (DisLIS)

This book reviews how the AUMI movement has evolved in the years since its inception, with the people involved in it most closely detailing its impact on music education and disability activism. Narratives, case studies, and personal reflections highlight Oliveros’ philosophical and realized contributions to the AUMI movement, which until this book’s publication has received little attention.

Becoming Steve Bright, Robert L. Tsai

Kentucky Law Journal

No abstract provided.

Like Balance On Ice: Towards A New Approach To The Open And Obvious Doctrine Under Kentucky Law, Hayden T. Crosby

Kentucky Law Journal

No abstract provided.

Just A Place Or A Just Place?: Domestic Violence, Urban-Rural Differences, And Access To Justice, Cassie Chambers Armstrong

Kentucky Law Journal

No abstract provided.

Prosecutorial Discretion And Digital Democracy, Erin Sheley

Kentucky Law Journal

No abstract provided.

Steady Flow Over A Plate With Variable Fluid Properties In The Presence Of Magnetic Fields And Thermal Radiation, Jonas A. James, Makungu J. Ng'oga, Augustino I. Msigwa, Ahmada O. Ali

Tanzania Journal of Engineering and Technology (TJET)

The study examines a steady convective boundary layer flow model influenced by magnetic fields and variable fluid properties over the inclined plate. The governing model system of non-linear partial differential equations is transformed into a system of coupled non-linear ordinary differential equations through similarity transformations. These transformed equations are then solved numerically using the fourth-order Runge-Kutta method combined with the shooting techniques using MATLAB package because it is efficiency, stable and converge to the expected solutions compared with other methods. The numerical results detail the fluid velocity, temperature, concentration, and the local Sherwood number, Nusselt number, and skin friction coefficient …

Affordability And Usability Of Digital Learning Resources In Higher Education: A Case Of Online Mathematics Tutorials For Engineering Students At The University Of Dar Es Salaam, Fatuma S. Ikuja, Idrissa S. Amour, Abdi T. Abdalla

Tanzania Journal of Engineering and Technology (TJET)

Effective learning requires engagements with both learning contents and instructor’s personalized support. Large class sizes often limit opportunities for personalized instruction and timely feedback. Digital resources offer a viable solution to enhanced engagement and independent learning. This study investigated the affordability and usability of online digital learning resources for mathematics tutorials, specifically targeting engineering students at the University of Dar es Salaam. A quasi-experimental research design was adopted, focusing on digitization of undergraduate course: Matrices and Basic Calculus for Non-Majors (MT161). The course was delivered through the Moodle Learning Management System integrating STACK to support Mathematics questions. Data was collected …

Denoising Low Dose Ct Images Using Enhanced Autoencoder Deep Learning Model: A Phantom Study, Ali O. Masoud, Khamis O. Amour, Ahmed M. Jusabani, Adithya Rajnaryanan, Manoj Kumar, Yasir M. Haji, Mwingereza J. Kumwenda

Tanzania Journal of Engineering and Technology (TJET)

Reducing radiation dose in Computed Tomography (CT) inherently leads to increased image noise, which can compromise clinical interpretation. To address this limitation in Low Dose CT images (LDCT), numerous computational techniques particularly convolutional neural networks (CNN) have been explored for CT image enhancement. Various CNN architectures with different convolutional layer designs have been developed to improve image quality. This study evaluates the effectiveness of a developed CNN-based autoencoder for denoising LDCT images while preserving diagnostic integrity. An end-to-end CNN autoencoder with information bottleneck (IB) pipeline was designed and trained using CT phantom images with varying noise levels, aiming to suppress …

Dynamic-Based Assessment Of Shear Connectors In Composite Bridges With Data Taken From The Surface Of The Deck Slab, Emmanuel S. Leo

Tanzania Journal of Engineering and Technology (TJET)

Most bridge management systems generally rely on visual inspections for condition assessment; this means that damage in inaccessible parts of the structure, such as shear connectors in concrete composite bridges, can remain undetected until failure occurs. Localised non-destructive techniques are limited to small areas, time-consuming, and require prior knowledge of the damaged zone. These limitations can be overcome by using dynamic-based techniques. This study aims to investigate experimentally the efficiency of dynamic-based techniques in assessing the condition of shear connectors based on measurements taken from the surface of the deck slab. The study involved the construction of five composite beam …

Estimation Of Crop Water Requirements And Irrigation Demand For Maize And Rice In Morogoro, Tanzania Using The Cropwat 8.0 Model, Regina Pasiani, Johnson Mangesho, Paul Ts Limbu

Tanzania Journal of Engineering and Technology (TJET)

This study assessed the crop water requirements (CWR) and irrigation demands of maize and rice in Mvomero District, Morogoro Region in Tanzania, under varying seasonal rainfall and soil conditions. Using the CROPWAT 8.0 model, agrometeorological parameters such as temperature, rainfall, evapotranspiration, and effective rainfall were integrated with crop-specific characteristics and soil properties to simulate irrigation demands and quantify water needs across different crop phenological stages. The analysis employed decadal climatic data and crop coefficients (K_c) to simulate both the net and gross irrigation requirements. The findings revealed that maize, cultivated predominantly on red loamy soils, had a seasonal …

Impacts Of Climate Variability On Hydrological Response And Water Resources: Case Of Little Ruaha Catchment -Tanzania Using Ground And Chirps Data, Florence H. Mahay, Patrick C. Valimba, Madaka H. Tumbo, Fides J. Izdori, Leonard Maketa

Tanzania Journal of Engineering and Technology (TJET)

The Little Ruaha River catchment in Tanzania is increasingly affected by climate variability, with implications for agriculture, hydropower, and water supply. This study evaluates the effects of climate variability on rainfall and streamflow and assesses the usefulness of satellite-based rainfall data for hydrological modeling. Thirty-year records (1991–2020) of rain gauge and river flow data were analyzed using the Mann–Kendall test, and the HBV rainfall–runoff model was run with both gauge and CHIRPS satellite rainfall inputs. Annual rainfall exhibited no significant trends at most stations (p > 0.05), except for a notable decline at one eastern site. Seasonal rainfall and streamflow showed …

In-Depth Review Of Animal Anatomy In Veterinary Medicine, Fatima Ayad Hasan, Sarah Kamal Naser

Al-Bahir

This review explores the significance of animal anatomy across different fields, emphasizing both microscopic and macroscopic structures. The text covers teaching methods in veterinary medicine, with a focus on diagnostics and surgery. It also delves into various anatomical and moral issues, alongside contemporary teaching approaches. The importance of anatomy in both biological and clinical contexts continues to be central in advancing veterinary education, even with the presence of various digital tools and cutting-edge imaging technologies.

Health Implications Of Heavy Metal Contamination In Commercially Available Deodorant And Antiperspirant Products Sold In Benghazi, Libya, Maysson Yaghi, Khaled Elsherif

Al-Bahir

The extensive usage of deodorants and antiperspirants raises concerns about the potential health risks posed by heavy metal content. This study quantified the levels of five heavy metals: Aluminum, Zirconium, Lead, Cadmium, and Chromium in 22 commercial products widely used in Benghazi, Libya, and assessed the associated health risks. Samples, categorized into gel, stick, and roll-on formulations, were analyzed using iCAP TQ ICP-MS. Al and Zr showed the widest concentration ranges, reflecting their intentional use as active ingredients. Al levels ranged from trace amounts (0.032 mg/kg) up to a maximum of 99.10 mg/kg, while Zr was found exclusively in gel …

Takotsubo Cardiomyopathy In A 55-Year-Old Female With Atypical Chest Pain And A History Of Autoimmune Disease, Carrie Greene, Dana Mathew

Florida Journal of Emergency Medicine (FJEM)

A 55-year-old woman with rheumatoid arthritis and supraventricular tachycardia presented with acute chest pain radiating to the back/left shoulder, with nausea and lightheadedness. Initial ECG showed inferior–lateral ST-segment elevation with reciprocal depressions; within 90 minutes the STE resolved with new incomplete RBBB and diffuse low voltage. High-sensitivity troponin rose (delta ~270 ng/L). Point-of-care and formal echocardiography revealed LV wall-motion abnormalities. Emergent catheterization showed no obstructive CAD (<30% distal OM) with apical ballooning and EF 40–45%, consistent with Takotsubo cardiomyopathy; cardiac MRI confirmed myocardial edema. She was managed with anticoagulation initially, telemetry, and supportive care, and recovered uneventfully with normalization of function on follow-up.

ED Takeaways

• TTC can mimic STEMI with transient STE and conduction changes.

• Troponin rise + non-obstructive coronaries should prompt consideration of TTC.

• Consider TTC in post-menopausal women and those with autoimmune disease; use …

  ---

  Go to article

Meningococcemia In Boy With Dense Deposit Disease Receiving C5 Complement Inhibitor Ravulizumab, Andrew Gonedes, Alexandra Martinez, Allan M. Greissman, Hanan Atia, Eric Boccio

Florida Journal of Emergency Medicine (FJEM)

No abstract provided.

Unexpected Companions: Appendicitis And Bilateral Testicular Torsion, Jc Alvarenga, Melissa Kirk, Michelle Osorio-Rodriguez

Florida Journal of Emergency Medicine (FJEM)

Abdominal pain is a frequent chief complaint in the emergency department (ED), responsible for 5% of all visits yearly. Despite emergency room work ups, 25% of these cases go undiagnosed. In the pediatric population, abdominal pain can be even harder to differentiate with causes ranging from low acuity constipation to emergent surgical emergencies like torsion or appendicitis. During these visits, the likelihood of two emergent surgical diagnoses occurring concurrently is a rare and often overlooked occurrence.

This case describes a 15-year-old male with a chief complaint of nausea and vomiting starting several hours prior to arrival. In the ED, history, …

Building Resilience One Connection At A Time: A Guide To Developing Retention Programming On College Campuses, Stephanie Sibley, Rachel Daltry

Journal of Access, Retention, and Inclusion in Higher Education

Despite college students having the potential to be more socially connected than ever before thanks to technology and social media, many students still struggle with isolation, loneliness, and a lack of belongingness and community. These feelings and experiences not only increase the risk for suicidal behavior and diminish resilience, but they can also negatively impact student retention. Outreach programming that targets social connectedness will be described. Specific guidelines developed from first-hand experiences with implementing such programming will be highlighted, and readers will be encouraged to consider how similar programming could be implemented by various offices or personnel at their own …

Acquired Methemoglobinemia Secondary To Oral Ingestion Of Alkyl Nitrite, Larissa L. Tavares, David Neff, Christopher Didonato, Atul Sofat, Eric Boccio

Florida Journal of Emergency Medicine (FJEM)

Methemoglobinemia is a potentially life-threatening condition in which the ferric state of hemoglobin impairs oxygen transport, leading to refractory hypoxia. While most cases are acquired through exposure to oxidizing agents, this report details a rare case of acquired methemoglobinemia complicated by severe hypotension and pulmonary edema secondary to the oral ingestion of alkyl nitrite, colloquially known as a “popper.”

A 54-year-old male presented to the emergency department after orally ingesting an alkyl nitrite product, believing it would be more effective than inhalation. Shortly after, he developed dizziness, dyspnea, and dusky skin, and was found to be hypotensive and hypoxic. Initial …

Disaster Exercise: Evaluating Mci Triage Training, Michael J. Steflovich Jr, Jodie Stobierski, Alexis Davis, Natasha Pavlinetz, Nela Isic, Nicole Roberson, Earl Best Md

Florida Journal of Emergency Medicine (FJEM)

Abstract

Study Objectives

The primary objective of this study was to evaluate the effectiveness of a didactic lecture-based training on mass casualty incident (MCI) triage performance among first- and second-year medical students. Specifically, the study aimed to measure improvements in overall triage accuracy, as well as reductions in over-triage and under-triage rates for both adult and pediatric patients.

Methods

This study employed a pre-test/post-test design involving 31 participants. Participants completed an electronic pre-test consisting of 30 patient scenarios (20 adult and 10 pediatric) before attending a 40-minute didactic lecture on MCI triage principles. The lecture covered the identification of MCI …

Point Of Care Ultrasound For Rapid Identification Of Central Retinal Artery Occlusion And Subsequent Vision Rescue Utilizing Intravenous Alteplase, Joseph Pepe, Karl Kasischke, Calen Hart

Florida Journal of Emergency Medicine (FJEM)

Central retinal artery occlusion (CRAO) is a rare but critical diagnosis to make in patients with acute vision loss. Cases of central retinal artery occlusion historically have a poor prognosis due to delayed presentation, lack of early identification, and limited effective treatment options. Due to these challenges, patients are often left with permanent loss of vision.

We present a case of a male patient in his late 70s with sudden onset of loss of vision to the right eye. Identification of CRAO was made utilizing point of care ultrasound (POCUS). After discussion with neurology, the patient was treated with alteplase …

Metamaterial-Based Microstrip Antenna For Safe Detection Of Tiny Breast Tumors, Shrouk E. El-Sawy, Mohamed G. Abdelfattah, Nihal F.F. Areed, Ahmed Shaban Samra

Mansoura Engineering Journal

This study describes the construction of a compact microstrip patch antenna (MPA) with a triangular-shaped metamaterial layer for the safe detection of tiny breast tumors at 2.4 GHz. The metamaterial considerably improves the antenna's gain and directivity when compared to typical designs that do not include it, resulting in improved detection performance. The radiating patch of proposed antenna measures 29.3 × 38 × 1.6 mm and has been tested through simulations and experimental tests, exhibiting successful tumor identification in a realistic breast phantom. The results of both calculations and testing demonstrate a sensitivity of 6.643 dB/mm, allowing for precise detection …

Hemiballismus Secondary To Acute Cerebrovascular Accident, Benjamin Duppstadt, Andres Vega, Jonathan Hill, David Arbona

Florida Journal of Emergency Medicine (FJEM)

Hemiballismus is a rare hyperkinetic movement disorder characterized by involuntary, large amplitude flinging movements. We present the case of a 61-year-old male with multiple comorbidities who arrived at the emergency department with acute-onset hemiballismus of the left upper extremity, ultimately found to be secondary to a right middle cerebral artery (MCA) infarct. This case underscores the importance of considering stroke in the differential for new-onset movement disorders, even in patients with seemingly psychiatric features and a nondiagnostic initial computed tomography (CT) scan.

Ultrasound-Guided Needle Aspiration Of A Peritonsillar Abscess In The Emergency Department, Elizabeth Piwowarski, Kenith Dsouza, Taryn Hoffman

Florida Journal of Emergency Medicine (FJEM)

Background

Peritonsillar abscess (PTA) is a relatively common diagnosis to encounter in the emergency department (ED). If untreated, PTA can lead to serious outcomes such as airway compromise, deep space infections and septicemia. Point of care ultrasound (POCUS) can be used by the emergency physician to confirm the suspected diagnosis, evaluate the size and depth of the abscess, and be used as a guide during needle aspiration.

Case

A 26-year-old male presented to the ED with a sore throat and was found to have a peritonsillar abscess on exam, which was confirmed using computerized tomography (CT) imaging. Providers were unable …

Evaluating Ergonomics Education In United States Ophthalmology Residency Programs, Simran Ohri, Changseok Lee, R. Rishi Gupta, Alice Y. Zhang

Journal of Academic Ophthalmology

Background: Musculoskeletal disorders are prevalent among ophthalmologists because of occupational risks that include repetitive movements and uncomfortable postures. Teaching proper ergonomic practices early in an ophthalmologist’s career may help avoid outcomes such as chronic pain and early retirement.

Purpose: To investigate the level of formal ergonomics education in U.S. ophthalmology residencies.

Methods: An Association of University Professors of Ophthalmology (AUPO) approved survey was distributed to program directors and coordinators of 113 residency programs via the AUPO email listserv.

Results: The survey had a response rate of 33.6%. Of the 38 programs that responded, only 13 (34.2%) …

Womeninophthalmology: Gender Diversity In Ophthalmology Residency Program Social Media, Aretha Zhu, Jasmine Mahajan, Owais M. Aftab, Tyler P. Steidl, Daniela Yakobashvili, Priya Tailor, Rashika Verma, Catherine Ye, Rose S. Maisner, Miriam Habiel

Journal of Academic Ophthalmology

Purpose: Although women constitute a significant portion of medical students and physicians, representation of women in ophthalmology is relatively low. Residency programs are increasingly using social media to showcase and represent their program culture. The purpose of this retrospective cross-sectional study was to assess representation of gender diversity in social media posts by U.S. ophthalmology residency programs.

Methods: Instagram, Facebook, and TwitterTwitter/X accounts of ophthalmology residency programs accredited by the Accreditation Council for Graduate Medical Education were identified. Social media posts from 2019-2021 were analyzed for representation of gender diversity and/or explicit statements regarding gender diversity. Program metrics, including geographic …

Pilot And One-Year Follow-Up Of A Novel Hybrid Ophthalmology Elective Course For Preclinical Students, Amina Avril, Jason J. Jo, Jessica Tran, Claire Ufongene, Samira Farouk, Nisha Chadha

Journal of Academic Ophthalmology

Background: Preclinical elective courses, particularly in a hybrid format, may facilitate ease of access, increase exposure, and build interest in ophthalmology.

Purpose: To evaluate knowledge acquisition and interest in ophthalmology immediately after and 1 year after implementing a novel elective course.

Methods: We developed an optional, 8-session, hybrid elective course based on the American Academy of Ophthalmology objectives for medical students. The course included virtual didactics and in-person skills sessions. Each virtual session focused on an ophthalmic subspecialty and consisted of a facilitated case review followed by an interactive career-related discussion with a faculty member practicing that …

2025 Fall Commencement Program: Winona State University, Winona State University

WSU Commencement Programs

This is the Winona State University Fall 2025 commencement program. Commencement was on Friday, December 12, 2025. There were 2 ceremonies at 9:00am and 11:30am.

During the Commencement event, a complete list of graduates was provided online. This program was not published during the Commencement event. This digital copy is maintained in the repository for archival purposes.