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- Title
- ARE SOUTH FLORIDA’S GOPHER TORTOISE POPULATION’S GENETICALLY DIFFERENTIATED FROM EACH OTHER?.
- Creator
- Rothberg, Olivia, Frazier, Evelyn, Hughes, Colin, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
- Abstract/Description
-
Gopher Tortoises are an imperiled terrestrial tortoise considered ecosystem engineers, as their burrows support over 350 species of “commensals”. Due to extensive anthropogenic habitat destruction and fragmentation, tortoise populations have significantly declined over the past 100 years. This isolation is leading to a premature loss of genetic variation, further precipitating the decline of this species. Understanding the genetic structure of this species can aid management decisions through...
Show moreGopher Tortoises are an imperiled terrestrial tortoise considered ecosystem engineers, as their burrows support over 350 species of “commensals”. Due to extensive anthropogenic habitat destruction and fragmentation, tortoise populations have significantly declined over the past 100 years. This isolation is leading to a premature loss of genetic variation, further precipitating the decline of this species. Understanding the genetic structure of this species can aid management decisions through intentionally relocating animals based on genetic units and historic gene flow, to preserve adaptive diversity and evolutionary potential on a large scale. I investigated whether Southeast Florida has a genetically distinct subpopulation of Gopher Tortoises in the unexamined southeasternmost extent of their range, from Palm Beach to Miami-Dade counties, using 9 microsatellite loci previously characterized for this species (Schwartz et al 2003) and found that our populations are only modestly differentiated from each other, and have greater genetic diversity than other populations.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014362
- Subject Headings
- Gopher tortoises, Florida, South, Population genetics
- Format
- Document (PDF)
- Title
- EXPLORING THE ECONOMIC, FAMILY, AND SOCIAL ADAPTATIONS TO COVID-19 IN FORT PIERCE, FLORIDA: AN ANALYSIS OF CULTURAL CONSTRUCTIONS AND ADAPTATIONS IN A COASTAL COMMUNITY.
- Creator
- Santiago, Stephanie, Harris, Michael S., Florida Atlantic University, Department of Anthropology, Dorothy F. Schmidt College of Arts and Letters
- Abstract/Description
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This study investigates the profound repercussions and adaptive measures stemming from the COVID-19 pandemic in Fort Pierce, Florida. Through comprehensive ethnographic interviews with 31 residents, Fort Pierce is showcased as a representative microcosm, reflecting the broader spectrum of the state’s diversity. The analysis underscores how daily routines were drastically altered, and it sheds light on the innovative ways residents navigated these challenges. The effects of economic downturns,...
Show moreThis study investigates the profound repercussions and adaptive measures stemming from the COVID-19 pandemic in Fort Pierce, Florida. Through comprehensive ethnographic interviews with 31 residents, Fort Pierce is showcased as a representative microcosm, reflecting the broader spectrum of the state’s diversity. The analysis underscores how daily routines were drastically altered, and it sheds light on the innovative ways residents navigated these challenges. The effects of economic downturns, disruptions in consumption patterns, reduced social circles, and mental health challenges became evident, particularly among marginalized communities. The pandemic-induced environment led to job losses, supply chain disturbances, and jeopardized essential needs. As a result, feelings of isolation, anxiety, and depression flourished, and traditional social ties weakened. Yet, the resilient spirit of Fort Pierce was also in evidence. Residents displayed remarkable ability to adapt and innovate. Outdoor activities emerged as therapeutic escapes, and digital platforms filled the void in social and professional interactions. New behaviors, such as enhanced hygiene practices, became integral. However, as the pandemic’s timeline extended, a sense of fatigue with ongoing restrictions permeated the community.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014334
- Subject Headings
- COVID-19, Ethnology, Fort Pierce (Fla.)
- Format
- Document (PDF)
- Title
- DISSECTING THE MECHANISTIC ROLES OF REGULATORS IN MEDIATING AMYLOID-BETA AMYLOIDOGENESIS.
- Creator
- Shen, Fengyun, Du, Deguo, Florida Atlantic University, Department of Chemistry and Biochemistry, Charles E. Schmidt College of Science
- Abstract/Description
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Alzheimer’s disease (AD) is a common neurodegenerative disorder. The most recognized disease pathology is the Amyloid-β (Aβ) cascade hypothesis which states that the accumulation of Aβ plaques might be the cause of AD. In the AD brain, Aβ plaques stockpile a variety of molecular components including metals, lipids, nucleic acids, carbohydrates, and peptides, indicating Aβ aggregation might be influenced by these modulators. In this dissertation, we investigated the effects of Zn2+ and...
Show moreAlzheimer’s disease (AD) is a common neurodegenerative disorder. The most recognized disease pathology is the Amyloid-β (Aβ) cascade hypothesis which states that the accumulation of Aβ plaques might be the cause of AD. In the AD brain, Aβ plaques stockpile a variety of molecular components including metals, lipids, nucleic acids, carbohydrates, and peptides, indicating Aβ aggregation might be influenced by these modulators. In this dissertation, we investigated the effects of Zn2+ and carnosine, phospholipids, and β-hairpins on Aβ aggregation to dissect their mechanistic roles in the amyloidogenesis of Aβ. We first systematically studied the kinetic impact of Zn2+ on the aggregation of Aβ40 and Aβ40-M. Our results show that the presence of Zn2+ transforms the Aβ40 aggregation kinetics from a single sigmoidal to a biphasic process, while the aggregation of Aβ40-M is significantly suppressed by Zn2+. We also found that a nature dipeptide, carnosine, remarkably decreases the activity of Zn2+ on modulating Aβ aggregation, although it has a weak direct effect on the peptide aggregation kinetics. Second, we investigated the activities of Aβ40 and Aβ42 in inducing membrane damage and the effects of lipid membranes on the aggregation of these peptides using liposome models containing mitochondrial-specific phospholipid–cardiolipin (CL).
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014314
- Subject Headings
- Alzheimer's disease, Amyloid beta-Peptides, Neurodegenerative Diseases
- Format
- Document (PDF)
- Title
- INVESTIGATING THE LIVED EXPERIENCE OF LATINO FARMWORKERS WHO DRINK ALCOHOL.
- Creator
- Solorzano, Angel Johann Martinez, Wiese, Lisa Ann Kirk, Florida Atlantic University, Christine E. Lynn College of Nursing, Christine E. Lynn College of Nursing
- Abstract/Description
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Excessive alcohol use, in addition to economic and social impacts, increases the risks of numerous chronic health problems, which further increase societal costs (Gloppen et al., 2022). Over 5% of the global burden of disease and injury as calculated in disability-adjusted life years, stems from alcohol use (World Health Organization [WHO], 2023). In the United States, nearly 30 million persons in 2021 experienced alcohol use disorder (National Institute on Alcohol Abuse and Alcoholism [NIAAA...
Show moreExcessive alcohol use, in addition to economic and social impacts, increases the risks of numerous chronic health problems, which further increase societal costs (Gloppen et al., 2022). Over 5% of the global burden of disease and injury as calculated in disability-adjusted life years, stems from alcohol use (World Health Organization [WHO], 2023). In the United States, nearly 30 million persons in 2021 experienced alcohol use disorder (National Institute on Alcohol Abuse and Alcoholism [NIAAA], 2023a). Among these, the Latino population is prone to be diagnosed with alcohol use disorders (NIAAA, 2023a). Limited research is available regarding alcohol use among a particularly vulnerable Latino group: farmworkers (Arcury et al., 2016). To date, no phenomenological studies exploring the lived experiences of Latino farmworkers (LFWs) who drink alcohol have been found in the literature. The purpose of this study was to explore the lived experience of LFWs who use alcohol through a phenomenological approach to gain a greater understanding of LFWs’ experiences with alcohol. A semi-structured interview guide containing open-ended questions was used as the main qualitative measure. A sociodemographic survey was used at baseline to collect the participants’ sociodemographic data and to assess patterns of alcohol intake. Eighteen participants were interviewed. Interviews were audio-recorded on a digital recording device, and they were transcribed by the student researcher. Analysis of the transcriptions was performed by the student researcher and a dissertation committee member using Colaizzi’s (1978) seven-step phenomenological analytic method and ATLAS to search for themes.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014357
- Subject Headings
- Alcoholism, Hispanic Americans--Alcohol use, Farmworkers
- Format
- Document (PDF)
- Title
- Dscam1 Regulates Synapse Formation and Function in the Giant Fiber System of Drosophila.
- Creator
- Spencer, Casey L., Murphey, Rodney, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
- Abstract/Description
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Proper formation of synapses in the developing nervous system is critical to the expected function and behavior of an adult organism. Neurons must project neurites, in the form of axons or dendrites, to target areas to complete synaptic circuits. The biochemical tool that cells use to interact with the external environment and direct the guidance of developing neurites are guidance receptors. One such guidance receptor that is extensively studied to uncover its roles in developmental...
Show moreProper formation of synapses in the developing nervous system is critical to the expected function and behavior of an adult organism. Neurons must project neurites, in the form of axons or dendrites, to target areas to complete synaptic circuits. The biochemical tool that cells use to interact with the external environment and direct the guidance of developing neurites are guidance receptors. One such guidance receptor that is extensively studied to uncover its roles in developmental disorders and disease is DSCAM (Down-Syndrome Cell Adhesion Molecule). To better understand the role of DSCAM in humans, a fly homolog Dscam1 was extensively characterized in the giant fiber system (GFS) of Drosophila to further explore its roles in axon guidance, synapse formation, and synapse function. The UAS-Gal4 system was used to alter the protein levels of Dscam1 within the giant fiber interneurons (GFs). A UAS-RNAi construct against Dscam1 was used to knockdown translation of all possible isoforms within the GFs. A UAS-Dscam1(TM2) construct was used to overexpress a single isoform of Dscam1 that is specifically trafficked to the axons. Confocal microscopy was used to determine the morphological changes associated with dysregulated Dscam1 levels. Visualization via fluorescent markers was accomplished of both pre- and post-synaptic cells, the GFs and tergotrochanteral motorneurons (TTMns), respectively, and synapse interface was determined as colocalization of the two cells. Additionally, the functional components of the GF-TTMn synapse, both gap-junctions, and presynaptic chemical active zones were tagged via fluorescent antibodies and quantified.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014364
- Subject Headings
- Drosophila, Cell Adhesion Molecules, Nervous System, Synapses
- Format
- Document (PDF)
- Title
- RAISING THE BAR: HISPANIC/LATIN* HIGH SCHOOL STUDENTS’ EXPERIENCES IN AN EARLY COLLEGE PROGRAM.
- Creator
- Taylor, Pilar Forero, Willems, Patricia, Florida Atlantic University, Department of Curriculum, Culture, and Educational Inquiry, College of Education
- Abstract/Description
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As the Hispanic/Latin* population in the United States experiences rapid growth, a concerning decline in college completion rates among these students demands further investigation. This study aims to establish an understanding of historical disparities that pervade the provision of advanced education and experiences, which consequently impact access to postsecondary education for Hispanic/Latin* students. Given the heightened likelihood of encountering such disparities within this...
Show moreAs the Hispanic/Latin* population in the United States experiences rapid growth, a concerning decline in college completion rates among these students demands further investigation. This study aims to establish an understanding of historical disparities that pervade the provision of advanced education and experiences, which consequently impact access to postsecondary education for Hispanic/Latin* students. Given the heightened likelihood of encountering such disparities within this demographic, the pursuit of college degree attainment goals may necessitate particular emphasis. Utilizing Self-Determination Theory (SDT) as a foundation, the satisfaction of the three basic psychological needs—competence, autonomy, and relatedness—can be examined to elucidate how students’ intrinsic motivations are influenced by their interests and needs. As the nation grapples with equity challenges, identifying opportunities to expedite progress toward academic goals is crucial. This phenomenological study delves into the lived experiences of Hispanic/Latin* high school students who have opted for accelerated university curricula. The research investigates the impetus behind participation in dual-enrollment/early-college programs and the subsequent impact on undergraduate degree attainment. Employing an SDT framework, the motivational constructs affecting persistence are analyzed to address the question, "How does participation in a dual-enrollment/early-college curriculum influence undergraduate degree attainment?" Answering this query provides an essential foundation for educational researchers, policymakers, and school personnel to address the factors contributing to the low undergraduate degree attainment rates among Hispanic/Latin* students. A comprehensive understanding of SDT’s core tenets can reveal the significance of self-efficacy and motivation, as well as the adjustment experiences of Hispanic/Latin* high school students attending university full-time. By eliminating barriers to accelerated programs such as dual enrollment, positive implications for employment and socioeconomic equity are likely to ensue, propelling the United States toward becoming a global leader in college degree attainment.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014335
- Subject Headings
- Hispanic American high school students, Dual enrollment, Educational attainment
- Format
- Document (PDF)
- Title
- ESTABLISHMENT AND APPLICATION OF WORKFLOWS FOR STRUCTURE-FUNCTION ANALYSIS OF SYNAPTIC COMPONENTS.
- Creator
- Thomas, Connon I., Kamasawa, Naomi, Murphey, Rodney, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
- Abstract/Description
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At the site of neuronal communication, multiple interacting components drive synapse structure and function. Synaptic vesicle pools, membrane proteins, mitochondria, and perisynaptic astrocyte processes (PAPs) are all structures that can be altered through naturally occurring plasticity mechanisms to modulate neurotransmission, and disruption of these structures can result in synapse dysfunction and disease. Due to the minute size of the synapse, electron microscopy (EM) remains the gold...
Show moreAt the site of neuronal communication, multiple interacting components drive synapse structure and function. Synaptic vesicle pools, membrane proteins, mitochondria, and perisynaptic astrocyte processes (PAPs) are all structures that can be altered through naturally occurring plasticity mechanisms to modulate neurotransmission, and disruption of these structures can result in synapse dysfunction and disease. Due to the minute size of the synapse, electron microscopy (EM) remains the gold standard for ultrastructural characterization; however, due to the complexity of EM datasets, extraction of information has become a bottleneck which places limits on the amount of data that can be collected and analyzed. A need exists for easy-to-use workflows that automate and enhance analysis throughput, to keep up with the streams of image data that are able to be produced. Here, I develop the use of AI algorithms, correlative microscopy techniques, and novel structural analysis methods to characterize postsynaptic mitochondria, PAPs, synaptic vesicles, and integral membrane proteins and their impact on synapse structure and function. I show that both postsynaptic mitochondria and PAPs in the visual cortex are positioned to support synapse structure and function; cleavage of a synaptic adhesion molecule affects synaptic vesicle accumulation in the amygdala; and presynaptic voltage gated calcium channels aggregate near active zone machinery in the brainstem. In addition, I highlight the use of virtual reality as a fast and intuitive tool for the identification and isolation of individual neurites in 3D EM. Thus, my work establishes novel technical approaches for EM and advances our understanding of neuronal communication through original research of several synaptic components.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014315
- Subject Headings
- Synapses, Artificial intelligence, Astrocytes
- Format
- Document (PDF)
- Title
- EFFECTIVENESS OF MEMES PREDICTED BY MORAL CONTENT AND AFFECTIVE POLARIZATION.
- Creator
- Thompson, Jordan L., Wetherell, Geoffrey, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
- Abstract/Description
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Memes have become a staple in political communication. However, the relationship between individuals’ political orientation, their level of affective polarization, the moral content of memes, and meme effectiveness is underexplored. I expected that polarized partisans would rate ingroup memes as more effective than outgroup memes. In line with moral foundations theory, I expected that polarized liberals would rate individualizing foundation memes as more effective than less polarized memes...
Show moreMemes have become a staple in political communication. However, the relationship between individuals’ political orientation, their level of affective polarization, the moral content of memes, and meme effectiveness is underexplored. I expected that polarized partisans would rate ingroup memes as more effective than outgroup memes. In line with moral foundations theory, I expected that polarized liberals would rate individualizing foundation memes as more effective than less polarized memes and that polarized conservatives would rate binding foundation memes as more effective than less polarized conservatives. Participants (N = 467) rated moral political memes for meme effectiveness. Results indicated that more polarized conservatives, but not liberals, rated ingroup memes as more effective than outgroup memes. Polarized liberals rated purity/sanctity as more effective than less polarized liberals. Polarized conservatives rated fairness/reciprocity plus the binding foundations memes as more effective than less polarized conservatives. These results indicate that polarized partisans react to memes differently.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014316
- Subject Headings
- Memes, Political communication, Social psychology
- Format
- Document (PDF)
- Title
- TACKLING BIAS, PRIVACY, AND SCARCITY CHALLENGES IN HEALTH DATA ANALYTICS.
- Creator
- Wang, Shuwen, Zhu, Xingquan, Florida Atlantic University, Department of Computer and Electrical Engineering and Computer Science, College of Engineering and Computer Science
- Abstract/Description
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Health data analysis has emerged as a critical domain with immense potential to revolutionize healthcare delivery, disease management, and medical research. However, it is confronted by formidable challenges, including sample bias, data privacy concerns, and the cost and scarcity of labeled data. These challenges collectively impede the development of accurate and robust machine learning models for various healthcare applications, from disease diagnosis to treatment recommendations. Sample...
Show moreHealth data analysis has emerged as a critical domain with immense potential to revolutionize healthcare delivery, disease management, and medical research. However, it is confronted by formidable challenges, including sample bias, data privacy concerns, and the cost and scarcity of labeled data. These challenges collectively impede the development of accurate and robust machine learning models for various healthcare applications, from disease diagnosis to treatment recommendations. Sample bias and specificity refer to the inherent challenges in working with health datasets that may not be representative of the broader population or may exhibit disparities in their distributions. These biases can significantly impact the generalizability and effectiveness of machine learning models in healthcare, potentially leading to suboptimal outcomes for certain patient groups. Data privacy and locality are paramount concerns in the era of digital health records and wearable devices. The need to protect sensitive patient information while still extracting valuable insights from these data sources poses a delicate balancing act. Moreover, the geographic and jurisdictional differences in data regulations further complicate the use of health data in a global context. Label cost and scarcity pertain to the often labor-intensive and expensive process of obtaining ground-truth labels for supervised learning tasks in healthcare. The limited availability of labeled data can hinder the development and deployment of machine learning models, particularly in specialized medical domains.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014336
- Subject Headings
- Data analytics, Data mining, Ensemble learning (Machine learning), Machine learning, Health
- Format
- Document (PDF)
- Title
- EXTENDING THE EFFECT OF PRIOR ENTREPRENEURIAL EXPOSURE ON ENTREPRENEURIAL PERSISTENCE: AN INTENTION BASED MODEL.
- Creator
- Washington, Rozita B., Neubaum, Donald O., Florida Atlantic University, Department of Management Programs, College of Business
- Abstract/Description
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This research investigates the impact of prior entrepreneurial exposure on an entrepreneur’s intention to persist. The objective of this study was to employ the Theory of Planned Behavior based logic to investigate its mediating effect of prior entrepreneurial exposure on entrepreneurial persistence intention among entrepreneurs, and whether their perception of the quality of that exposure or experience influences entrepreneurs’ intention to persist. Specifically, this study explores five...
Show moreThis research investigates the impact of prior entrepreneurial exposure on an entrepreneur’s intention to persist. The objective of this study was to employ the Theory of Planned Behavior based logic to investigate its mediating effect of prior entrepreneurial exposure on entrepreneurial persistence intention among entrepreneurs, and whether their perception of the quality of that exposure or experience influences entrepreneurs’ intention to persist. Specifically, this study explores five exogenous influences on persistence intention. This study examines a final sample of 231 entrepreneurs from three data sources. The findings of this study indicate that subjective norms play a mediating role in the relationship between prior founding experience and persistence intention. The relationship between the perceived quality of prior entrepreneurial exposure and persistence intention behavior is also explained by subjective norms. Overall, it is not the exposure that leads to persistence intention, but the quality of the exposure that influences entrepreneur’s intention to remain in business. This study extends entrepreneurship literature on how exogenous variables impact entrepreneurial persistence intention through attitudinal factors.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014337
- Subject Headings
- Entrepreneurship, Entrepreneurship--Research, Business
- Format
- Document (PDF)
- Title
- TOWARD A FRAMEWORK FOR CREATIVE TEACHER PREPARATION.
- Creator
- Williams, Luke, Sembiante, Sabrina, Florida Atlantic University, Department of Curriculum, Culture, and Educational Inquiry, College of Education
- Abstract/Description
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This mixed methods study investigated the effectiveness of a novel educational framework, Creative Teacher Preparation (CTP), in enhancing the creative teaching abilities of undergraduate education students during field-based learning. The study focused on pre-service teachers enrolled in an undergraduate program designed for initial certification. The CTP framework is a synthesis of Lin's Creative Pedagogy and elements from traditional teacher preparation models. Within the CTP framework,...
Show moreThis mixed methods study investigated the effectiveness of a novel educational framework, Creative Teacher Preparation (CTP), in enhancing the creative teaching abilities of undergraduate education students during field-based learning. The study focused on pre-service teachers enrolled in an undergraduate program designed for initial certification. The CTP framework is a synthesis of Lin's Creative Pedagogy and elements from traditional teacher preparation models. Within the CTP framework, teacher candidates engaged in an eight-week seminar designed to improve their understanding of creative pedagogy and prepare them to implement creative teaching strategies during field-based learning. Employing an bb, the study consisted of two phases: an initial phase utilizing semi-structured interviews and field notes for data collection, followed by a final phase using a modified version of the Creativity Fostering Teacher Behaviors Index (CFTBIndex) (Soh, 2000). A control group was also observed to assess the statistical significance of the impact of the CTP framework, implemented through the eight-week seminar, on participants' creative teaching approaches.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014338
- Subject Headings
- Teachers--Training of, Creative teaching, Education--Study and teaching
- Format
- Document (PDF)
- Title
- INTERNAL OXYGEN DYNAMICS AND RHIZOSPHERE OXIDATION IN TROPICAL SEAGRASS, THALASSIA TESTUDINUM.
- Creator
- Winn, Nathaniel, Koch-Rose, Marguerite, Florida Atlantic University, Department of Environmental Sciences, Charles E. Schmidt College of Science
- Abstract/Description
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Large-scale seagrass mortality events have been linked to internal hypoxia and exposure to phytotoxins in the sediment, such as hydrogen sulfide (H2S). Although seagrasses can transport oxygen (O2) to belowground tissues (rhizomes and roots) and into surrounding sediment to prevent H2S intrusion, reoccurring seagrass mortality events from H2S exposure continue. In the present study, I examined the potential of tropical seagrass Thalassia testudinum to transport O2 effectively to belowground...
Show moreLarge-scale seagrass mortality events have been linked to internal hypoxia and exposure to phytotoxins in the sediment, such as hydrogen sulfide (H2S). Although seagrasses can transport oxygen (O2) to belowground tissues (rhizomes and roots) and into surrounding sediment to prevent H2S intrusion, reoccurring seagrass mortality events from H2S exposure continue. In the present study, I examined the potential of tropical seagrass Thalassia testudinum to transport O2 effectively to belowground tissues and diffuse O2 into Florida Bay sediment around the root rhizosphere or sediment-root interface to constrain H2S diffusion into the roots. My approach was to (1) examine the spatial distribution of O2 in the rhizosphere during the light and dark with 2-D planar optode sensors, (2) examine patterns of root O2 loss (ROL) with O2 dye tracing experiments, and (3) measure O2 and H2S dynamics in internal tissues and rhizospheres. My results indicate that T. testudinum effectively sustains oxidation in belowground tissues to constrain H2S, but minimal evidence of ROL into the rhizosphere.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014365
- Subject Headings
- Turtle grass Seagrasses, Thalassia testudinum, Hydrogen sulfide--Environmental aspects, Rhizosphere
- Format
- Document (PDF)
- Title
- Dosimetric Influence of Dose due to the PTV Dose Uniformity on the Critical Organs.
- Creator
- Yigit, Erdem, Pella, Silvia, Theodora Leventouri, Theodora Leventouri,, Florida Atlantic University, Department of Physics, Charles E. Schmidt College of Science
- Abstract/Description
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Dose uniformity in the Planning Target Volume (PTV) can induce a higher-than-expected dose distribution in the nearby critical organs. The goal of this study is to evaluate the influence of the Planning Target volume dose uniformity on the surrounding critical organs (OAR). Ten cases of anonymized patients’ data were selected for our study including: Breast cancer, Brain cancer, Head and Neck cancer, Lung and Prostate calculations of Conformity indices, Biological Effective Doses (BED), Tumor...
Show moreDose uniformity in the Planning Target Volume (PTV) can induce a higher-than-expected dose distribution in the nearby critical organs. The goal of this study is to evaluate the influence of the Planning Target volume dose uniformity on the surrounding critical organs (OAR). Ten cases of anonymized patients’ data were selected for our study including: Breast cancer, Brain cancer, Head and Neck cancer, Lung and Prostate calculations of Conformity indices, Biological Effective Doses (BED), Tumor Control Probability (TCP) and Normal Tissue Complication Probability (NTCP) were used to calculate the dose distribution in PTV as well as the dose delivered to the surrounding critical organs of each PTV. We assume that the tumors PTVs have homogeneous density as well as the surrounding normal tissue. Conformity indices (CI) for Breast (PTV) are between 1.8 – 1.9, for Brain (PTV) are between 1.6 – 2.0, for Lungs are 1.5 – 1.6, for Prostate are between 0.4 – 0.5, for Head and Neck are 0.3 – 0.4. Dose uniformity in all the PTVs is 1.089 which is a good indication of the quality of treatment delivered to the tumor. TCP is averaging of value of 87.94 and NTCP is 3.4445.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014339
- Subject Headings
- Radiation dosimetry, Biophysics, Cancer
- Format
- Document (PDF)
- Title
- THE CAUSAL ROLE OF THETA OSCILLATIONS IN THE FRONTOPARIETAL NETWORK ON COGNITIVE FLEXIBILITY.
- Creator
- Yoon, Yosun, Hong, Sang Wook, Florida Atlantic University, Department of Psychology, Charles E. Schmidt College of Science
- Abstract/Description
-
Cognitive flexibility is crucial for efficient goal-directed behavior, especially in rapidly changing environments. While recent studies have consistently shown enhanced theta power and synchronization in the frontoparietal network during flexible task-switching, direct evidence establishing a causal link between theta-rhythm brain oscillation and cognitive flexibility remains limited. In this study, we applied transcranial alternating current stimulation (tACS) to the frontoparietal network...
Show moreCognitive flexibility is crucial for efficient goal-directed behavior, especially in rapidly changing environments. While recent studies have consistently shown enhanced theta power and synchronization in the frontoparietal network during flexible task-switching, direct evidence establishing a causal link between theta-rhythm brain oscillation and cognitive flexibility remains limited. In this study, we applied transcranial alternating current stimulation (tACS) to the frontoparietal network at a theta frequency (6 Hz) with a phase difference of either 0° (inphase) or 180° (antiphase) to explore its impact on task-switching performance. The results showed no significant tACS modulation effects on switch costs or neural oscillatory synchronization in the frontoparietal network. However, a consistent negative correlation was observed between frontoparietal theta power in the early time window of cue-target interval and task switching performance, implying the close relationship between proactive control in task switching and frontoparietal theta activities.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FA00014340
- Subject Headings
- Theta Rhythm, Cognition, Cognitive psychology
- Format
- Document (PDF)
- Title
- An Assessment of Potential Threats to Human Health from Algae Blooms in the Indian River Lagoon (USA) 2018–2021: Unique Patterns of Cytotoxicity Associated with Toxins.
- Creator
- Esther Guzman, Tara A. Peterson, Priscilla L. Winder, Kirstie T. Francis, Malcolm McFarland, Jill C. Roberts, Jennifer Sandle, Amy E. Wright
- Abstract/Description
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The Indian River Lagoon (IRL), a 156-mile-long estuary located on the eastern coast of Florida, experiences phytoplankton bloom events due to increased seasonal temperatures coupled with anthropogenic impacts. This study aimed to gather data on the toxicity to human cells and to identify secondary metabolites found in water samples collected in the IRL. Water samples from 20 sites of the IRL were collected during the wet and dry seasons over a three-year period. A panel of cell lines was used...
Show moreThe Indian River Lagoon (IRL), a 156-mile-long estuary located on the eastern coast of Florida, experiences phytoplankton bloom events due to increased seasonal temperatures coupled with anthropogenic impacts. This study aimed to gather data on the toxicity to human cells and to identify secondary metabolites found in water samples collected in the IRL. Water samples from 20 sites of the IRL were collected during the wet and dry seasons over a three-year period. A panel of cell lines was used to test cytotoxicity. Hemagglutination, hemolysis, and inhibition of protein phosphatase 2A (PP2A) were also measured. Cytotoxic blooms were seen both in the south (Microcystis) and the north (Pyrodinium) of the IRL. Each toxin induced a consistent pattern of cytotoxicity in the panel of human cell lines assayed. During blooms, cytotoxicity due to a single type of toxin is obvious from this pattern. In the absence of blooms, the cytotoxicity seen reflected either a mixture of toxins or it was caused by an unidentified toxin. These observations suggest that other toxins with the potential to be harmful to human health may be present in the IRL. Moreover, the presence of toxins in the IRL is not always associated with blooms of known toxin-producing organisms.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FAUIR000517
- Format
- Document (PDF)
- Title
- Disruptive French: Using OER to promote linguistic justice in the French-language classroom.
- Creator
- Blattner, Geraldine, Dalola, Amanda, Roulon, Stephanie
- Abstract/Description
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A prestige-focused approach to language teaching, motivated by hegemonic definitions of “normativity” defined by a privileged few, is one that sustains inequity, misrepresents the speech community, and excludes learners by denying them access to the cultural and linguistic tools they need to relate to real-world users. Now more than ever, as language departments struggle to fill seats and argue for the relevance of their disciplines, educators must instead embrace a linguistic justice...
Show moreA prestige-focused approach to language teaching, motivated by hegemonic definitions of “normativity” defined by a privileged few, is one that sustains inequity, misrepresents the speech community, and excludes learners by denying them access to the cultural and linguistic tools they need to relate to real-world users. Now more than ever, as language departments struggle to fill seats and argue for the relevance of their disciplines, educators must instead embrace a linguistic justice approach which simultaneously critiques monolingualism and integrates plurilingual practices essential to valorizing the linguistically-rich realities of 21st-century learners. #OnYGo, an Open Educational Resource (OER) for first-year French, employs a linguistic justice approach that redraws the francophone landscape through a lens of social justice and cultivates learners’ awareness of language variation and identity via translanguaging, the development of metalinguistic awareness, and the thoughtful use of digital tools which invite learners to create and interpret language across modalities, guided by a multiliteracies framework. Because OERs are free from the censorship of commercial publishers, we argue that they should not only be used to increase accessibility to language education but also to promote equitable and iconoclastic approaches to language teaching like the one on display in #OnYGo.
Show less - PURL
- http://purl.flvc.org/fau/fd/fauir000516
- Format
- Document (PDF)
- Title
- OnYGo.
- Creator
- Blattner, Géraldine, Dalola, Amanda, Roulon, Stéphanie
- Abstract/Description
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#OnYGo is an innovative first-year French language e-textbook, designed as Open Educational Resource (OER), for learning beginning French (equivalent to one year at an American university). It is inspired by a remix of task-based, multiliteracies and communicative approaches, which provides students with opportunities to engage with French language and culture in a variety of contexts and situations, across a range of modalities. Through a wide range of activities, students develop and...
Show more#OnYGo is an innovative first-year French language e-textbook, designed as Open Educational Resource (OER), for learning beginning French (equivalent to one year at an American university). It is inspired by a remix of task-based, multiliteracies and communicative approaches, which provides students with opportunities to engage with French language and culture in a variety of contexts and situations, across a range of modalities. Through a wide range of activities, students develop and practice their language skills, and reflect on their cross-cultural knowledge and positionality in their understanding of the vast francophone landscape.
Show less - Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/fauir000515
- Format
- Document (PDF)
- Title
- Exploring Fractals: the Madelbrot Set.
- Creator
- Diehl, Sarah, McGovern, Warren Wm., Harriet L. Wilkes Honors College, Florida Atlantic University
- Abstract/Description
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A fractal is a shape that is self-similar through infinitely many iterations. There are many instances of self-similarity in nature, but fractals can be computer-generated and even modeled after nature. One of the most notable examples of a computergenerated fractal is the Mandelbrot set, which is defined as the set of those z for which the orbit of fc(z) = z2 + c is bounded. This set is an instance of how a simple iteration can be extremely intricate.
- Date Issued
- 2023
- PURL
- http://purl.flvc.org/fau/fd/FAUHT00283
- Format
- Document (PDF)