Digital Commons Network^™

Comparing Hydrogen Peroxide And Sodium Perborate Ultraviolet Advanced Oxidation Processes For 1,4-Dioxane Removal From Wastewater Effluent, Tulsi Shukla

Electronic Theses and Dissertations, 2020-2023

Ultraviolet advanced oxidation processes were compared using sodium perborate (UV/NaBO3 AOP) or hydrogen peroxide (UV/H2O2 AOP) for 1,4-dioxane removal from tertiary wastewater effluent. Both UV/H2O2 and UV/NaBO3 AOPs were also tested with the addition of acetic acid. Results revealed that sodium perborate performed similarly to hydrogen peroxide – the UV/NaBO3 AOP with 6 milligrams per liter (mg/L) as H2O2 resulted in 43.9 percent 1,4-dioxane removal, while an equivalent UV/H2O2 AOP showed 42.8 percent removal. Although the oxidants performed similarly, NaBO3 is an average of 3.3 times more expensive than H2O2. However, the solid form of NaBO3 can provide a major …

Preservice Teacher Intersectional Awareness: A Qualitative Inquiry, Lindsey Pike

Electronic Theses and Dissertations, 2020-2023

The purpose of this dissertation was to investigate the intersectional awareness of preservice general education teachers as experienced through an internship in an urban, Title 1 funded school. Intersectionality Theory (Boveda, 2016; Crenshaw, 1990; Dill & Zambrana, 2009; Jones & Wijeyesinghe, 2011) was used as a theoretical framework to inform this study. A descriptive phenomenological design (Creswell, 2013; Moustakas, 1994) was used to examine preservice teachers' (PSTs)lived experiences within their teacher preparation program courses and internship. Data were collected through individual semi-structured interviews with preservice general education teachers. Data analysis was completed using Colaizzi's (1978) seven-step process as outlined by …

Probing Endothelial Cell Mechanics Under Disturbed Fluid Flow, Jingwen Wu

Electronic Theses and Dissertations, 2020-2023

Endothelial cells, which form the inner layer of the vasculature, interact with the extracellular matrix (ECM) by exerting mechanical contractile cell-substrate stress called tractions and cell-cell stresses called intercellular stresses. This cellular mechanical behavior involves many fundamental biological processes, including cell migration, differentiation, angiogenesis, and wound healing. Also, the inner surface of the vasculature, where endothelial cells reside, is constantly exposed to various fluid flows. The most variable fluid flow regimes occur primarily within branching regions of the vasculature. Endothelial cells residing within these regions experience disturbed flow, which consists of irregular flow patterns and extreme wall shear stress gradients. …

Lived Experience At Plinkaigalis, Lithuania: An Integrated Approach Using Stable Isotope, Spatial, And Statistical Analyses, Alexandria Orozco

Electronic Theses and Dissertations, 2020-2023

The Migration period (4th-7th century AD) represents a time of major sociopolitical change, but relatively little is known about this time in Lithuania's history (Bliujien?, 2013; Jankauskas & Kozlovskaya, 1999). The focus of this dissertation is to understand the lived experiences of individuals interred in the Migration Period cemetery at Plinkaigalis, Lithuania, through integrated analyses of stable isotope, statistical and spatial methods to assess 253 human bone/tooth samples. Isotopic analysis included assessments of stable carbon, nitrogen, and oxygen stable isotope values. Statistical analysis included a MANOVA (Multivariate Analysis of Variance) test. Spatial methods included buffers, kernel density, spatial statistics (Moran's …

Emotion-Related Transactive Memory Systems: Theory And Nomological Network, Jigyashu Shukla

Electronic Theses and Dissertations, 2020-2023

Transactive memory systems are emergent states in teams that represent the shared knowledge about skills and expertise of the team members which is encoded and stored in the collective memories and is retrieved when required. Traditionally, transactive memory systems literature has focused on encoding, storing, and retrieving only task-related information in teams. Unfortunately, this emphasis on the task-related aspect of transactive memory systems has ignored the potential for transactive memory systems involving emotional knowledge, skills, and expertise in the team. My dissertation explores the emotional side of transactive memory systems and introduces a novel construct: emotion-related transactive memory systems (ETMS). …

Optimizing Deep Neural Networks Performance: Efficient Techniques For Training And Inference, Ankit Sharma

Graduate Thesis and Dissertation 2023-2024

Recent advances in computer vision tasks are mainly due to the success of large deep neural networks. The current state-of-the-art models have high computational costs during inference and suffer from a high memory footprint. Therefore, deploying these large networks on edge devices remains a serious concern. Furthermore, training these over-parameterized networks is computationally expensive and requires a longer training time. Thus, there is a demand to develop techniques that can efficiently reduce training costs and also be able to deploy neural networks on mobile and embedded devices. This dissertation presents practices like designing a lightweight network architecture and increasing network …

Exploring Stakeholder Experiences To Co-Design Policy Alternatives For The Bright Futures Scholarship Program, Sherry Paramore

Graduate Thesis and Dissertation 2023-2024

Despite decades of research and promising strategies to ensure educational equity for all students, a significant disparity persists between the racial majority and marginalized students in the United States. Attaining educational equity is a complex problem illustrated by state-funded merit-based scholarships, including the State of Florida Bright Futures Scholarship. Since Florida's merit-based Bright Futures Scholarship Program's (BFSP) inception, the average percentage of black scholarship recipients has been minimal compared to other races. The equitable distribution of scholarship funds is critical to investigate since attaining a post-secondary education advances social mobility consequently breaking the cycle of poverty for lower socioeconomic students …

Xps Study Of Calcium Lanthanum Sulfide Ceramics, Brian E. Butkus

Graduate Thesis and Dissertation 2023-2024

Long wave infrared (LWIR) optics that transmit in the 8 to 14 m wavelength range and, additionally, can withstand severe physical and thermal stresses are needed for advanced remote sensing, guidance and communication-based applications. However, most non-oxide transparent LWIR optics do not have the wider transmission range, nor the hardness and resistance to thermal shock needed for extreme environments. Because of these limitations, research is circling back to a promising material, calcium lanthanum sulfide (CLS), that could meet LWIR needs for extreme environments.

In this thesis, we will demonstrate the abilities of x-ray photoelectron spectroscopy (XPS) as a technique for …

Painting And Fear: The Creation Of Death's Visage, Mark A. Felbinger

Graduate Thesis and Dissertation 2023-2024

Death's Visage is a feature film that was created from an idea developed due to a personal relationship with an artist, who was a professional illustrator and painter. The film follows a young woman who becomes entrapped in a demonic sphere and time zone where her fear is the demon's gratification. She questions the events that are unfolding, which creates herpsychological turmoil, while taking place in the family home that is in an older established middle-class neighborhood.

Death's Visage was a micro-budgeted film produced for $20,778. The capital needed for this film meets the University of Central Florida Feature Film …

The Stench Of Miasma And The Fragrance Of Daffodils: Reconstructing Historical Scentscapes In Mesopotamia, Samantha N. Levy

Graduate Thesis and Dissertation 2023-2024

My thesis interrogates the role that the sense of smell plays in the experience of place, arguing that scent has been virtually ignored in public history contexts. The thesis will review the foundational scholarship on the history of the senses and relate the findings of interdisciplinary research that demonstrates how the senses alter one's understanding of the environment and even the formation of memories. This work is relevant to the field of public history since smell can be used to captivate the public in a memorable—and potentially more authentic—engagement with the Mesopotamian past. To address gaps in the present scholarship, …

Exploring A Lab-Scale Cascade Upflow Bioreactor System For Nitrogen Removal Via Biosorption Activated Media, Alejandra Robles Lecompte

Graduate Thesis and Dissertation 2023-2024

Many Best Management Practices (BMPs) have been developed to reduce excessive nutrients in stormwater runoff and mitigate harmful algal blooms in downstream receiving water bodies. This study demonstrates a new BMP by comparing two green sorption media (i.e., specialty adsorbents) for nutrient removal in cascade upflow biofiltration systems operated in parallel. The proposed filtration technology can control hydraulic gradients, prevent clogging and settlements, and increase hydraulic loading while removing more nutrients in an integrated physicochemical and microbiological treatment process. The two green sorption media being tested in this study include zero-valent-iron and perlite-based green sorption media (ZIPGEM) and biochar, iron, …

Identification And Influence Of Species-Informative 16s Ribosomal Rna Sequences And Evaluation Of Ocean Biofilms, Nikhil Bose

Electronic Theses and Dissertations, 2020-2023

16S ribosomal RNA (rRNA) gene sequences are commonly analyzed for taxonomic and phylogenetic purposes because they contain variable regions that help distinguish genera. However, intra-genus classification is difficult due to high sequence similarity among closely related species. The biological impact of nucleotide variants in 16S variable regions are often unknown and hence their sequence differences are weighted evenly during classification, which provides poor species identity confidence. In this dissertation, I determined that analysis of intra-genus 16S allelic variants can provide species information and that nucleotide changes in 16S rRNA variable regions can impact ribosome quality. In one study, I analyzed …

Navigating With Sharks: How The Marketing Practices Help To Create Successful Phishing Emails, Erica Castilho

Graduate Thesis and Dissertation 2023-2024

A phishing email is a crime where a scammer sends an email to get sensitive data. Everyday phishing email attacks impact billions of people worldwide. Preparing users to better identify phishing and avoid risky engagement with it is essential to combat this threat. We consider that as phishing emails and email marketing aim to target email clicks, scammers can use marketing practices in phishing emails to achieve their goals. However, the security research community doesn't explore deeply the similarities between phishing and email marketing. This study presents a distinctive framework known as the Phishing Engagement Marketing Optimization (PEMO). The primary …

Clay As A Control Technique For Karenia Brevis: Water Chemistry Dynamics And Physiological Impacts On Benthic Invertebrates, Victoria Devillier

Graduate Thesis and Dissertation 2023-2024

Clay-based compounds are globally the most advanced and widely used method of direct suppression of marine harmful algal blooms, and are currently undergoing investigation as an option to control Karenia brevis blooms in Florida. Before clay may be accepted for widespread use, there are multiple concerns and challenges that must be addressed regarding the environmental safety of this method, such as effects on water quality, the fate of toxins, and potential impacts of clay treatment to non-target organisms. To contribute to ongoing assessments of clay as a potential control method for K. brevis blooms, we conducted experiments with a formulation …

Functionalization Of 1d And 2d Nanostructures And Their Applications, Yuen Yee Li Sip

Graduate Thesis and Dissertation 2023-2024

Material discovery and development has been playing a significant role in shaping human civilizations, by studying and improving materials for appealing observations to aid in our survival as well as to satisfy our curiosity. From the common earthly materials that give us strong building structures and hunting weapons to the Silicon Age that contributes to the creation of modern electronics and computers, the development of novel and enhanced materials continues to grow. Recently, a new field has emerged that is rapidly expanding the engineering circle; these are called nanomaterials. By shrinking bulk materials into structures with nanoscale dimensions, there is …

Solid State Nuclear Magnetic Resonance Probing Of Structures Of The Rous Sarcoma Virus Capsid, Amyloid Beta, And Reflectin Proteins, Tyrone Thames

Graduate Thesis and Dissertation 2023-2024

Solid State Nuclear Magnetic Resonance (ssNMR) spectroscopy can be a powerful tool for investigating the atomic-level structures and dynamics of biological macromolecules, including proteins. In this dissertation, I present an ssNMR study of three diverse proteins, revealing insights into their respective secondary structures, conformational variations, and intermolecular interactions. Additionally, I introduce novel computational methods to facilitate the assignment of chemical shifts of ssNMR spectra. The first of the proteins is the capsid protein of the Rous Sarcoma Virus. In previous research, the structure of the hexameric lattice of the in-vitro tubular assembly of the capsid protein was determined. In this …

Understanding The Interactions Between Conservation Agencies And Rangers: A Mixed-Methods Approach, Christina M. Burton

Graduate Thesis and Dissertation 2023-2024

Research describing conservation agencies has generally been exploratory and limited in the use of theory. Similarly, organizational theories can provide an understanding for how organizations change and adapt to their given environments, but they have not been applied to conservation agencies with unique challenges and strains from other public bureaucracies or private corporations. In expanding this body of literature, not only were these theories applied conservation agencies, but they were also explored in what Powell and Colyvas (2008, p. 276) called "microfoundations" of organizations, which focuses on the interplay between individuals and organizations. To explore this, a convergent mixed-methods design …

System Wide Analysis And Determination Of Accuracy, Precision, And Repeatability Of A Custom Prism Coupling Refractometry Instrument, Andrew W. Howe

Graduate Thesis and Dissertation 2023-2024

New optical designs have necessitated using refractive index data that is accurate to the third and fourth decimal points. Prism coupling refractometry could be attractive for this task because of a combination of factors. It allows for a direct assessment of the refractive index like interferometry or the minimum deviation method while being quick and convenient, like Kramers-Krönig analysis and spectroscopic ellipsometry. However, the accuracy, precision, and repeatability of this technique have not been revisited recently in the literature. This thesis seeks to identify the critical features of this technique that define its uncertainties and then provides some initial improvements …

Optical Characterization Of Liquids: Refractive Index And Raman Gain Coefficient Measurements, Cesar A. Lopez-Zelaya

Graduate Thesis and Dissertation 2023-2024

Novel technologies capable of generating wavelengths not accessible with typical laser gain media have been among the primary drivers of the field of nonlinear optics. Here, we are interested in the linear and nonlinear properties of liquids beyond the visible spectrum, motivated in part by their use as core materials in optical fibers. Given their dispersion, nonlinearities, transparency, and ability to be mixed, liquids show potential for exploiting in-fiber nonlinear phenomena for developing the new generation of low cost, size, weight, and power wavelength-agile fiber-laser sources. For the design, modeling, and experimental realization of these liquid-core fiber laser sources, proper …

High-Efficieny Ultrafast Mid-Infrared Source For Strong Field Science, Fangjie Zhou

Electronic Theses and Dissertations, 2020-2023

The potential of high-energy sources within the mid-infrared region (3-8 μm) has garnered significant attention for diverse research and industrial applications. Millijoule pulses extending beyond 3 μm can facilitate the production of x-rays with photon energies in the keV range through high harmonic generation (HHG). These high-energy x-ray pulses enable the characterization of electron dynamics within molecules and condensed matter materials. Additionally, the atmospheric transmission window between 3-5 μm allows lasers within this spectral range to deliver energy efficiently to distant targets via optical filaments without divergence, highlighting promising prospects for defense applications. In contrast to laser amplifiers, which are …

Student Perceptions Of Campus Crime And Victim Services, Tracy Gulliford

Graduate Thesis and Dissertation 2023-2024

Few would argue that college campus crime is a serious problem across the United States. Debate arises, however, regarding why the problem is so pervasive and how best to address it. This dissertation addresses that gap by exploring the nature and magnitude of the college campus crime problem followed by a rationale for studying student perceptions regarding knowledge about and use of victim services resources offered on the University of Central Florida (UCF) campus. Doing so is particularly important in light of the fact that five years have now passed since UCF launched the "Let's Be Clear" campaign designed to …

Diamond's Hidden Gems - Library Hours, Diamond R. Williams

Libraries' Documents

While you can usually count on the John C. Hitt Library to be open, there are some days when library hours change.

This is usually done to accommodate national holidays, football games, intersession, or finals week. You can also expect late-night (for some, early-morning) hours thanks to UCF's brand new OverKnight Study!

Read on below to find out when you can expect the library to be open on a semester basis and some holidays to look out for!

Diamond's Hidden Gems - Cmc, Diamond R. Williams

Libraries' Documents

You might recall that in a Spring 2023 Hidden Gems about study spaces, I briefly mentioned the CMC Library. My feelings about it, unsurprisingly, remain the same: it is truly one of the best-kept secrets at UCF.

And while it is still a nice place to relax and review schoolwork, there is a lot about it that I left out. Read on below to learn more about the CMC!

Professional Development For Graduate School: Eportfolio And Networking, Wesley Lim

High Impact Practices Student Showcase Fall 2023

The development of an ePortfolio offers a digital introduction during networking events in an increasingly technology-driven society. Throughout one semester in Biomedical Sciences Careers, MCB 3933, I developed an ePortfolio with components like a resume, personal statement, individual development plan, and elevator speech. In my ePortfolio, I had three areas of focus that showcased my highlights and skills in my undergraduate education: the academic skill sets I developed, my relevant research experiences, and my time as a teaching assistant for multiple courses.

As part of the course, students were required to contact at least four people in their desired field …

Project Nur: Illuminating Lives Through Islamic Society's Community Service In Central Florida, Adam Bawatneh

High Impact Practices Student Showcase Fall 2023

This poster presents an in-depth exploration of my service experience at the Islamic Society of Central Florida (ISCF), where I have been serving as the head chef for the Family Night event. It delves into the challenges and triumphs encountered during my service, particularly in light of the recent conflict in Palestine. The poster also reflects on the personal growth and leadership development I have experienced throughout this journey.

Addressing Women's Issues With Period. Ucf, Erin Fuchs

High Impact Practices Student Showcase Fall 2023

In my Advanced Leadership Class, LDR 3215, we were instructed to choose a social issue that we felt passionately about. Women’s rights issues have been a topic of interest for me for a very long time, so I chose to research and address the topic of period poverty, which is an overlooked subject, despite its prevalence in our society. In my research, I found some very interesting, but heartbreaking information that sparked me to work with an organization called Period. UCF, a local RSO that provides period products to the local homeless population and supports The Menstrual Movement, designed to …

Eportfolio Of Haley Galvis, Haley Galvis

High Impact Practices Student Showcase Fall 2023

This ePortfolio is aimed to help me be set apart from other applicants when pursuing my path following graduation. This unique method of showcasing my undergraduate experiences helps to generate a more personal view. Through this course, I made an elevator pitch, which can be found in the "about" page. Additionally, I learned a lot about time management, while balancing this major project with the other responsibilities of this course and my other commitments. Further, I learned how important it is to reflect on an experience and connect what I learned to how I can apply it in the future.

Post-Intensive Care Syndrome In Survivors Of Acute Respiratory Distress Syndrome (Ards) And Covid-19 Ards: A Descriptive Study, Sara Hassan

Honors Undergraduate Theses

Background: Post-intensive care syndrome (PICS) is an umbrella term for the long-term physical, cognitive, and mental health conditions survivors live with long after an ICU discharge. Mental health conditions experienced by survivors include anxiety, depression, and post-traumatic stress disorder (PTSD). Survivors of acute respiratory distress syndrome (ARDS) and COVID ARDS who were on a ventilator are particularly at risk of developing long-term mental health conditions.

Study Purpose: The purpose of this study was to investigate the severity of anxiety, depression, and PTSD in adult survivors of these two ARDS conditions (COVID ARDS; ARDS) who were admitted to intensive care units …

Nursing Interventions For Families Of Children With Down Syndrome Evaluating Coping Mechanisms And Community Resources, Ashley M. Brophy

Honors Undergraduate Theses

Down syndrome is the most common chromosomal disorder, occurring in 1 out of every 700 births in the United States (Skotko et al., 2009). After receiving the initial Down syndrome diagnosis, the majority of mothers reported feeling frightened and anxious, and very few rated the experience as positive. Parents reported feeling that their physicians focused on the negative aspects of Down syndrome and rarely provided enough resources (Skotko, 2005). The purpose of this literature review was to identify current community resources for families of children with Down syndrome and identify the most effective ways for medical professionals to support parents …

Nursing Interventions To Decrease Depressive And Anxious Symptoms In Hispanic-American Youth, Vanessa C. Hernandez

Honors Undergraduate Theses

Introduction: Hispanic-American youth are less likely to receive mental health services despite being at increased risk for depression and anxiety. Having depression and anxiety at a young age can have detrimental long-term effects such as sexual risk behavior, delinquency, and suicide. Various kinds of nurses interact with this age group which can be a missed opportunity to intervene for the welfare of these youth. Interventions exist for depression and anxiety; however, they are not specific to nurses who care for young Hispanic-American patients. Methods: An integrative literature review was performed to identify nursing interventions for Hispanic American youth with depression …