Digital Commons Network^™

Covert Computation In The Abstract Tile-Assembly Model, Robert M. Alaniz, Timothy Gomez, Andrew Rodriguez, Tim Wylie, David Caballero, Elize Grizzell, Robert Schweller

Computer Science Faculty Publications

There have been many advances in molecular computation that offer benefits such as targeted drug delivery, nanoscale mapping, and improved classification of nanoscale organisms. This power led to recent work exploring privacy in the computation, specifically, covert computation in self-assembling circuits. Here, we prove several important results related to the concept of a hidden computation in the most well-known model of self-assembly, the Abstract Tile-Assembly Model (aTAM). We show that in 2D, surprisingly, the model is capable of covert computation, but only with an exponentialsized assembly. We also show that the model is capable of covert computation with polynomial-sized assemblies …

Human Connection: A Crucial Ingredient In Vacation Experience, Ondrej Mitas, Moji Shahvali, Peter Ward, Mat Duerden, Marcel Bastiaansen

Faculty Publications

The past decade (2012–2022) has seen a blossoming of research on tourists’ quality of life. Frameworks such as subjective well-being (Diener & Seligman, 2002), the PERMA wellbeing theory (Seligman, 2012) and eudaimonia (Filep & Deery, 2010) have been used to document the numerous positive psychological effects of tourist experiences. One of the most robust findings from this literature is that engaging in tourism triggers emotions. Ranging from the excitement of hobby-focused competitions and tours (Mitas et al., 2012a) to the relaxation of a spa (Strauss-Blasche et al., 2004a), dozens of studies have now documented salubrious emotional profiles over the course …

Development Of A Porous Layer-By-Layer Microsphere With Branched Aliphatic Hydrocarbon Porogens, Farah Shahjin, Milankumar Patel, Mahmudul Hasan, Jacob D. Cohen, Farhana Islam, Md Ashaduzzaman, Mohammad Ullah Nayan, Mahadevan Subramaniam, You Zhou, Irene Andreu, Howard E. Gendelman, Bhavesh D. Kevadiya

Chemical, Biomolecular, and Materials Engineering Faculty Publications

Porous polymer microspheres are employed in biotherapeutics, tissue engineering, and regenerative medicine. Porosity dictates cargo carriage and release that are aligned with the polymer physicochemical properties. These include material tuning, biodegradation, and cargo encapsulation. How uniformity of pore size affects therapeutic delivery remains an area of active investigation. Herein, we characterize six branched aliphatic hydrocarbon-based porogen(s) produced to create pores in single and multilayered microspheres. The porogens are composed of biocompatible polycaprolactone, poly(lactic-co-glycolic acid), and polylactic acid polymers within porous multilayered microspheres. These serve as controlled effective drug and vaccine delivery platforms.

Development Of Polymeric Nano- And Microparticle-Based Controlled Release Platforms, Ryan Ivone

Open Access Dissertations

The success of the development of drug delivery formulations hinges upon their ability to maintain therapeutic efficacy, while simultaneously aiming to minimize off-site side effects and reduce the dosing burden often faced by patients. Localized formulations deliver therapeutics directly to the disease site and can help circumvent physiological obstacles such as the first pass effect, which remains one of the primary barriers for oral drug delivery. Barriers such as the first pass effect can drastically reduce the overall bioavailability of a formulation, potentially requiring a higher initial dose to remain therapeutically effective. However, many compounds demonstrate dose dependent side effects, …

Development And Characterization Of Nano- And Microparticles For Pulmonary Drug Delivery, Matthew Freeman

Open Access Dissertations

Pulmonary drug delivery is a rapidly growing area of interest in the field of inhalable therapeutics and provides the possibility for specialized engineered inhalable drug-loaded particles capable of improving treatment efficacy. Pulmonary drug delivery provide several advantageous when compared to other routes of administrations, as therapeutics delivered to the lungs avoid the first-pass effect of the liver, which is a major hurdle for other routes of administration. The potential for drug degradation is also decreased as the lungs have low to no enzymatic activity. Furthermore, the lungs have a large surface and are highly vascular, resulting in rapid onset of …

An Evaluation Of Object Detection Algorithms Applied To Oceanographic Midwater Imagery, Charlotte A. Debossu

Open Access Master's Theses

Object detection algorithms have emerged as powerful tools in various domains, yet their application to oceanographic images remains in its early stages. Particularly, the use of stereo camera systems for capturing images of macroscopic marine organisms is still considered novel imagery. Therefore, it is critical to understand how well deep learning algorithms perform in classifying marine organisms in these types of images. This thesis aims to contribute to the nascent literature on this task in the context of stereo camera imagery. The study evaluates the classification performance of two prominent deep learning models, YOLOv5 and ResNet50, when applied to images …

Associations Of Snfl With Clinico-Radiological Measures In A Large Ms Population., Elias S Sotirchos, Kathryn C Fitzgerald, Carol M Singh, Matthew D Smith, Maria Reyes-Mantilla, Carrie M Hersh, Megan H Hyland, Ryan Canissario, Sarah B Simmons, Georgina Arrambide, Xavier Montalban, Manuel Comabella, Robert T Naismith, Min Qiao, Lauren B Krupp, Jacqueline A Nicholas, Katja Akgün, Tjalf Ziemssen, Richard Rudick, Elizabeth Fisher, Robert A Bermel, Ellen M Mowry, Peter A Calabresi

Neuroscience Articles

OBJECTIVE: Evaluation of serum neurofilament light chain (sNfL), measured using high-throughput assays on widely accessible platforms in large, real-world MS populations, is a critical step for sNfL to be utilized in clinical practice.

METHODS: Multiple Sclerosis Partners Advancing Technology and Health Solutions (MS PATHS) is a network of healthcare institutions in the United States and Europe collecting standardized clinical/imaging data and biospecimens during routine clinic visits. sNfL was measured in 6974 MS and 201 healthy control (HC) participants, using a high-throughput, scalable immunoassay.

RESULTS: Elevated sNfL levels for age (sNfL-E) were found in 1238 MS participants (17.8%). Factors associated with …

Spatiotemporal Analyses Of Pelagic Sargassum : Biodiversity, Morphotypes And Arsenic Content, Kristie Alleyne

World Maritime University Ph.D. Dissertations

Pelagic sargassum blooming in the Tropical Atlantic has been linked to the mass shoreline inundations observed over the last decade in Caribbean and West African countries. Since the onset in 2011, affected countries have and continue to experience multiscale impacts across fisheries, tourism, nearshore coastal ecosystems, maritime transport and public health. Impacts associated with influx events have generated significant economic damage across the region. Moreover, clean-up efforts in response to mass shoreline strandings placed further strain on national economies and in some instances amplified the negative environmental effects caused by inundations.

Evidence suggests that influx events are likely to continue …

Navigating Missed Visits In Hiv Primary Care: Exploring Risk Factors Associated With Missed Visits, Jiaying Hao

All ETDs from UAB

The HIV care continuum is a public health model that outlines the steps or stages people with HIV go through from diagnosis to achieving and maintaining viral suppression. Retention in care, a key component of the HIV care continuum, is critical in achieving good health outcomes for people with HIV (PWH) and preventing HIV transmission. Consistent HIV care is essential for the health of PWH as a part of retention in care. De-spite no standard measure for retention in care to PWH, the missed (no-show) vis-its/appointments is one of the most commonly used methods for evaluating retention in HIV care. …

An Exploration Of The Mental Health Experiences Of Young Women With Diminished Ovarian Reserve, Brittany M. Woods

All ETDs from UAB

Infertility is a reproductive disease resulting in the inability to conceive. One in six individuals will experience infertility in their lifetime. Diminished ovarian reserve (DOR) reduces the quantity and/or quality of a female's oocyte pool and is a known cause of infertility. Although this occurs during normal ovarian aging in the late 30s and early 40s, DOR can also impact younger women, increasing their risk for psychological distress from an unexpected diagnosis. The purpose of this dissertation is to develop a deeper understanding of the mental health experiences of young women with DOR through the generation of three manuscripts. Manuscript …

Effects Of Dietary R, S-1, 3-Butanediol Diacetoacetate On Components Of Energy Balance And Hepatic Health, Kelsey A. Rushing

All ETDs from UAB

Objective: Exogenous ketone administration presents a possible treatment strategy for obesity and obesity-related diseases. The exogenous ketone ester, R,S-1,3-butanediol diacetoacetate (BD-AcAc2) decreases adiposity and hepatic steatosis in high-fat dietinduced obese mice. In our previous work, carbohydrate energy was removed and replaced with the ketone ester to produce isocaloric diets. The current investigation aimed to determine whether BD-AcAc2 decreases markers of hepatic steatosis and inflammation in lean mice on a high-fat, high-sugar (HFHS) diet without removing carbohydrate energy. Methods: Sixteen 11-week-old male C57BL/6J mice were randomized to one of two groups for 9 weeks (n = 8 per group): 1) Control …

Understanding The Dual Role Of The Oncolytic Viruses And Natural Killer Cells In Targeting Neuroblastoma, Colin Harrington Quinn

All ETDs from UAB

Pediatric cancer is the leading cause of death by disease in children, and neuroblastoma accounts for roughly 15% of pediatric cancer related deaths. Neuroblastoma is a malignancy of neural crest origin and develops in the ganglia of the peripheral nervous system, most commonly arising in the adrenal glands. Advancements in therapy have significantly improved outcomes for children with low-risk neuroblastoma but for those with high-risk refractory, or relapsed disease, survival outcomes remain dismal and intervention with toxic chemotherapeutics often result in long term morbidities. The need for improved therapies for this patient population is dire. Immunotherapies offer a novel approach …

Plasticity Characteristics Of Cxcr5+ Cd4+ T Memory Cells And Cxcr5- Non-Tfh Memory Cells, Ching-En Lee

All ETDs from UAB

iv ability to differentiate into CXCR5- and CXCR5+ effector cells between the CCR7- and CCR7+ CXCR5+ CD4+ T memory cells, between WT and μMT CXCR5+ CD4+ T memory cells, as well as between Bcl6- and Bcl6+ CXCR5- non-Tfh memory cells. This finding did not support the hypothesis that the heterogeneous characteristics within CXCR5- non-Tfh memory cells and CXCR5+ CD4+ T memory cells significantly affect their abilities to differentiate into CXCR5- and CXCR5+ effector cells during recall responses.

Genetic And Epigenetic Risk Scores For Chronic Kidney Disease In African Americans, Alana C. Jones

All ETDs from UAB

Kidney disease is the tenth-leading cause of death in the United States (US). There are significant racial disparities within kidney disease: African Americans (AAs) have the highest rates of CKD and carry a four-fold higher risk of developing end-stage renal disease (ESRD). They are also less likely to undergo kidney transplants, and among those who do, are more likely to experience graft rejection. Additionally, until 2021, kidney function equations were shown to underestimate the severity of kidney disease in AA due to the use of race coefficients. Among all populations, genetic and epigenetic factors contribute to kidney disease. However, AAs …

Optimization Of Progranulin Gene Therapy, A Potential Treatment For Frontotemporal Dementia, Shreya Natesh Kashyap

All ETDs from UAB

Heterozygous loss of function mutations in the progranulin gene cause frontotemporal dementia, characterized by deficits in social behavior, language comprehension and motor function. Almost every frontotemporal dementia-related progranulin mutation is loss of function and results in progranulin haploinsufficiency. For this reason, progranulin replacement is a conceptually straightforward therapeutic strategy for patients with frontotemporal dementia caused by progranulin mutations. Here, we outline progranulin biology, progranulin deficient mouse models of frontotemporal dementia and preclinical interventions centered around increasing brain progranulin levels. We have demonstrated that blocking the progranulin C-terminus, which harbors the sortilin binding site, improves the cross-correctional capacity of neurotropic progranulin …

Molecular Influences Of Racial Disparities In Pancreatic Neuroendocrine Tumors, Brendon Herring

All ETDs from UAB

Pancreatic Neuroendocrine Tumors (PNETs) are highly heterogeneous neoplasms arising from the hormone-secreting cells of the endocrine pancreas. PNETs are broadly categorized as functional and non-functional based on the presence of symptoms associated with hormone secretion, which occurs in approximately 30% of cases. While functional tumors are all considered for resection because of these symptoms and their associated sequelae, non-functional tumors > 2cm are currently resected based on increased risk of developing metastatic disease. However, this criterion is based on data from predominantly White patients. Recent studies have shown that Black patients have much higher rates of lymph node metastatic disease at …

Investigating Scientific Self-Concept In The General Chemistry Laboratory While Performing Course-Based Undergraduate Research Throughout A Pandemic, Josh Forakis

All ETDs from UAB

Climate change, waste management crises, and global pandemics emphasize the need for a thriving science, technology, engineering, and mathematics (STEM) workforce, and one of the jobs of STEM educators is to provide meaningful educational experiences that engage STEM students in scientific practices, broaden their worldview, and prepare them for a future career in the scientific field. Undergraduate research experiences have been shown to benefit STEM students, but few students can participate, especially at early stages in their undergraduate studies. To broaden participation in undergraduate research, an honors general chemistry laboratory course was converted into a course-based undergraduate research experience (CURE) …

Inkjet-Printed Reseroir Computing Network For In Situ Sensor Predictions, Steven D. Gardner

All ETDs from UAB

The technological achievements made with silicon-based transistors have led to nearly all the computing seen today, complete with benefits such as maximized operating speeds, parallel/tensor processing, minimized power overhead, etc. The silicon electronics industry is foundational to scientific progression with its profound impact on modeling, simulations, and fast/reliable computing. However, silicon-based transistors have evolved to meet their physical limitations and have saturated fields of innovation. New fields in computing outside of silicon-based methods have emerged as exotic materials enter the research domain. The suite of super-performing materials like Graphene, Carbon Nanotubes, and Molybdenum Disulfide have chaotic, non-linear behaviors that make …

Modular Regulation And Function Of The Polypyrimidine Tract Binding Protein 1 (Ptbp1), Christine Carico

All ETDs from UAB

RNA binding proteins (RBPs) are critical regulators of gene expression as they are responsible for the chaperoning and processing of every nascent RNA transcript. Many studies have investigated mechanisms of specificity of RBP function and have identified factors such as cell-specific expression of RBPs and differential preferences for RNA secondary structure. However, RBPs are often multi-domain proteins that contain repeats of various RNA binding domains (e.g., RNA recognition motif) and little work in the genomic era of transcriptomic interrogation has been done to define the contribution of individual domains to the overall protein function. Polypyrimidine tract binding protein 1 (PTBP1) …

Aging With Hiv And Comorbid Chronic Obstructive Pulmonary Disease, Jun Yeong Byun

All ETDs from UAB

Older adults with human immunodeficiency virus (HIV) experience a high prevalence of chronic obstructive pulmonary disease (COPD). Considering having either HIV or COPD is related to worse health outcomes in older adults, aging with both HIV and COPD may synergistically and negatively affect the health outcomes of older people with HIV (PWH) and comorbid COPD. The purpose of this dissertation was to explore the aging of PWH with COPD. This purpose was accomplished through three articles: 1) an adaptation of a gerontological model investigating what is known about the aging of PWH and people with COPD and extrapolating that to …

Impact Of Streptococcus Parasanguinis-Generated Reactive Nitrogen Species On Pseudomonas Aeruginosa Virulence And The Host Response, Joshua J. Baty

All ETDs from UAB

Streptococcus parasanguinis is an oral commensal bacterium that produces hydrogen peroxide. Hydrogen peroxide can react with endogenous molecules such as nitrite to form reactive nitrogen intermediates (RNI). These S. parasanguinis-mediated RNI have been shown to inhibit oral pathogens such as Streptococcus mutans, Enterococcus faecalis, and Aggregatibacter actinomycetemcomitans. As such, S. parasanguinis plays a protective role in the oral microbial ecosystem by antagonizing and preventing colonization by oral pathogens. In addition to being an important organism for the health of the oral cavity, S. parasanguinis has also been associated with improved outcomes for people with cystic fibrosis. There are two explanations …

Exploring The Regulatory Mechanisms Of Ire1 Signaling In Biotic And Abiotic Stress Responses In Arabidopsis, Taiaba Afrin

All ETDs from UAB

Given their immobility, plants have various survival strategies, including the critical ability to recognize and respond to stressors. Exposure to different environmental and intracellular signals triggers significant modifications in stress response regulators' expression. These changes often occur in the endoplasmic reticulum (ER), where a rise in protein synthesis can overwhelm the system, accumulating misfolded proteins and activating a mechanism known as the unfolded protein response (UPR). UPR is a complex regulatory network with three primary branches in eukaryotic systems. The IRE1-mediated pathway is the most conserved among UPR signaling branches. In Arabidopsis, IRE1 splices bZIP60 mRNA and produces a functional …

Gain Of Keratinized Muscosa Around Dental Implants Using A Combination Of Strip Gingival Graft And Acellular Dermal Matrix - A Prospective Case Study, Louai Haddad

All ETDs from UAB

Several surgical techniques have been described to increase keratinized tissue (KT) around implants and teeth. Despite various methods, the bulk of evidence reported that the use of keratinized autogenous graft (i.e., Free Gingival Grafts (FGG)), harvested from the patient’s palate, remained the gold standard in soft tissue augmentation procedures and provided more predictable results. However, soft tissue autograft supply can be limited, and its harvesting is associated by increased patient morbidity. Several clinical studies have demonstrated the effectiveness of using allogenic soft tissue grafts such as Acellular Dermal Matrix Allograft (ADMA) instead of FGG to augment keratinized tissue (KT). This …

Pharmacologic Proteasome Activators Ameliorate Alzheimer's-Like Pathology In Ad Fly Models, Mehar Bano

All ETDs from UAB

The proteasome is a large multi-subunit protease responsible for the degradation and removal of oxidized, misfolded, and polyubiquitinated proteins. The proteasome plays a critical role in nervous system processes. This includes the maintenance of cellular homeostasis in neurons (1). It also includes synaptic efficacy and plasticity as well as protein turnover, presynaptic vesicle transport, and neuronal protesostasis. Proteasome function is impaired as a consequence of aging, which is aggravated by conditions like Alzheimer's Disease and Related-Dementias (AD, ADRD) (2). According to earlier work from our lab the proteasome is critical to how quickly AD progresses. In Drosophila, human cells, and …

The Role Of Runx2 And Sp7 In Ameloblast Differentiation And Postnasal Enamel Synthesis, Reem Alhefdhi

All ETDs from UAB

In mammals, the mineralized tissues include bone, dentin, enamel, and cementum. Runx2 and its downstream target Sp7 are essential transcription factors for the osteoblast differentiation and formation of bone tissue. However, transcription factors that regulate ameloblast differentiation and enamel secretion are less understood. To uncover the role of Runx2 and Sp7 in ameloblasts differentiation and enamel synthesis, we established a colony of Runx2 and Sp7 floxed mice. Both genes were deleted specifically in ameloblasts using K14-Cre transgenic mice. The successful deletion of Runx2 and Sp7 genes in the epithelium, including ameloblasts, was confirmed using Td-Tomato and GFP reporter, respectively. Histological …

Doing A Good Search: Basic Rules And Search Tips, Roy E. Brown

VCU Libraries Faculty and Staff Publications

This handout is an update of a previous handout and should be used as a reference for those learning how to search databases effectively. The handout covers the basic rules of doing a good search in order to search more efficiently and effectively. The revised handout includes information related to Boolean operators, types of questions, and a list of potential databases to be searched for various clinical questions.

Citizen Science: Role Of Inaturalist In Biodiversity Documentation And Education In Arkansas, K. Baker, L. Barnes, S. Rana, J. Jackson, R. Kannan

Journal of the Arkansas Academy of Science

iNaturalist is a global online digital platform for documenting and fostering interest in biodiversity, with Research Grade (RG) entries being vetted and scientifically valid observations. Here we present a review of the role of approximately 16,000 Arkansans using the iNaturalist tool for recording 445,000 verifiable observations comprising 10,800 species, with 40 percent RG, and one third of observations still pending confirmation. Overall, plants lead in RG observations followed by invertebrates and birds. Within these groups, reptiles lead in proportion of RG observations, followed by birds and amphibians. Less charismatic or infrequently encountered organisms are less represented. Arkansas ranks about average …

Caregiving To Older Adults With A Physical Limitation: Evidence From The Mexican Health And Aging Study, Carlos Díaz-Venegas, Rafael Samper-Ternent, Rebeca Wong

Faculty, Staff and Student Publications

BACKGROUND AND OBJECTIVES: Many older adults face physical limitations to performing activities of daily life (ADLs) and instrumental activities of daily life (IADLs) and seek help performing them. In Mexico, family caregivers, especially spouses and adult children, traditionally take care of older adults. However, a detailed characterization of the care received has not been thoroughly provided. We sought to identify socioeconomic, demographic, and health-related differences in receiving help among older adults reporting physical limitations.

RESEARCH DESIGN AND METHODS: Using the 2012 wave of the Mexican Health and Aging Study, we provided information on adults aged 60 and older who reported …

Iga-Biome Profiles Correlate With Clinical Parkinson's Disease Subtypes, Eric L Brown, Heather T Essigmann, Kristi L Hoffman, Ashley S Alexander, Michael Newmark, Zhi-Dong Jiang, Jessika Suescun, Mya C Schiess, Craig L Hanis, Herbert L Dupont

Faculty, Staff and Student Publications

BACKGROUND: Parkinson's disease is a heterogeneous neurodegenerative disorder with distinctive gut microbiome patterns suggesting that interventions targeting the gut microbiota may prevent, slow, or reverse disease progression and severity.

OBJECTIVE: Because secretory IgA (SIgA) plays a key role in shaping the gut microbiota, characterization of the IgA-Biome of individuals classified into either the akinetic rigid (AR) or tremor dominant (TD) Parkinson's disease clinical subtypes was used to further define taxa unique to these distinct clinical phenotypes.

METHODS: Flow cytometry was used to separate IgA-coated and -uncoated bacteria from stool samples obtained from AR and TD patients followed by amplification and …

Nurse-Administered Auricular Point Acupressure For Cancer-Related Pain, Barb Van De Castle, Nada Lukkahatai, Bsn Lynn Billing, Xinran Huang, Hulin Wu, Jingyu Zhang, Salahadin Abdi, Jun Kameoka, Thomas J Smith

Faculty, Staff and Student Publications

PURPOSE: The study aimed to (1) examine the feasibility of providing a training course on auricular point acupressure (APA) for clinical oncology nurses to integrate APA into real-world nursing care settings, and (2) examine the effectiveness of APA on cancer-related pain (CRP) under usual inpatient oncology ward conditions.

METHODS: This was a 2-phase feasibility study. Phase 1, an in-person, 8 hour training program was provided to oncology nurses. Phase 2, a prospective and feasibility study was conducted to evaluate the integration of APA into nursing care activities to manage CRP. Oncology patients were included if their pain was rated at …