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The Global Impact Of Covid-19 And Tourism On Conservation Rangers' Guardianship Capabilities, Zachary Bockler Jan 2022

The Global Impact Of Covid-19 And Tourism On Conservation Rangers' Guardianship Capabilities, Zachary Bockler

Honors Undergraduate Theses

This thesis explores how the COVID-19 pandemic has impacted wildlife rangers with an emphasis on the influences of tourism rates. Two sets of data are used: one is a survey of rangers around the world and the other looks at global governmental tourism data. While coming from a routine activities perspective, the problem of decreased capable guardianship becomes apparent in the form of massively decreased tourism arrivals and troubling ranger perceptions. This data allows for the establishment of tourism trends and changes during COVID. The findings of this thesis link the downturn in tourism with impacts on formal and informal …

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Investigation Of Pitching And Plunging Motions On A Tandem Wing Configuration, Riley M. Capiro Jan 2022

Investigation Of Pitching And Plunging Motions On A Tandem Wing Configuration, Riley M. Capiro

Honors Undergraduate Theses

From the beginning of the history of flight, inspiration has been drawn from nature. Evolution has spent millions of years optimizing creatures that rely on flight as their means of locomotion. Today, aerial vehicles are very different to those from the time of the Wright brothers. One kind of vehicle that stands to benefit in mimicking nature is the drone, particularly smaller drones. Commonly used today by militaries, industry and civilians, drones are increasingly affordable while also decreasing in size thanks to advancements in electronics and manufacturing methods. The purpose of this thesis is to investigate how pitching and rolling …

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Genetic Algorighm Representation Selection Impact On Binary Classification Problems, Stephen V. Maldonado Jan 2022

Genetic Algorighm Representation Selection Impact On Binary Classification Problems, Stephen V. Maldonado

Honors Undergraduate Theses

In this thesis, we explore the impact of problem representation on the ability for the genetic algorithms (GA) to evolve a binary prediction model to predict whether a physical therapist is paid above or below the median amount from Medicare. We explore three different problem representations, the vector GA (VGA), the binary GA (BGA), and the proportional GA (PGA). We find that all three representations can produce models with high accuracy and low loss that are better than Scikit-Learn’s logistic regression model and that all three representations select the same features; however, the PGA representation tends to create lower weights …

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Photocatalytic Hydrogen Production Over Boron Rich Solids, Emma E. Blanco Jan 2022

Photocatalytic Hydrogen Production Over Boron Rich Solids, Emma E. Blanco

Honors Undergraduate Theses

The greenhouse emission produced from the combustion of fossil fuels, such as methane (CH4­) and carbon dioxide (CO2), are linked to global warming crisis because of their ability to absorb heat emitted to space by the Earth’s atmosphere. Over the last century, methane is estimated to have the Global Warming Potential (GWP) estimated to be 28-36 times larger than carbon dioxide. Although it is released in smaller quantities, methane traps nearly 90 times more heat than CO2. While recent research efforts has focused on the capture and conversion of CO2, these efforts …

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Intrinsically Mode Reconfigurable Load Modulation Balanced Amplifier Leveraging Transistor's Analog-Digital Duality, Niteesh Bharadwaj Vangipurapu Jan 2022

Intrinsically Mode Reconfigurable Load Modulation Balanced Amplifier Leveraging Transistor's Analog-Digital Duality, Niteesh Bharadwaj Vangipurapu

Electronic Theses and Dissertations, 2020-2023

The communication schemes have rapidly changed the face of the human means of communication. The evolution from one generation to another has triggered many challenges on the design methodologies of RF designers. As the evolution ensued, the spectrally efficient modulation schemes have resulted in the substantial rise of PAPR, the peak-to-average power ratio. To enable the efficient amplification of the high PAPR signals, this thesis explores the areas of Load modulated Balanced amplifiers that can be inherently reconfigured to achieve a better efficiency than the conventional RF power amplifiers that see a significant drop in the efficiency as the signal …

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Static Analysis Of The Build System To Accelerate Continuous Testing Of Highly Configurable Software, Necip Fazil Yildiran Jan 2022

Static Analysis Of The Build System To Accelerate Continuous Testing Of Highly Configurable Software, Necip Fazil Yildiran

Electronic Theses and Dissertations, 2020-2023

Continuous testing is widely used for facilitating fast and reliable software delivery. However, build-time configurability makes such testing harder for configurable software. As configurable software forms the basis of much of our computing infrastructure, there is even more need for better continuous testing for configurable software. In this dissertation, our goal is to improve the quality of configurable software. To this end, we tackle two, previously unsolved problems. The build system of configurable software is one of the biggest reasons why testing configurable software is hard. Therefore, in our solutions, we deal with the build system by using a comprehensive …

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Autoignition Delay Time Measurements And Chemical Kinetic Modeling Of Hydrogen/Ammonia/Natural Gas Mixtures, Jessica Baker Jan 2022

Autoignition Delay Time Measurements And Chemical Kinetic Modeling Of Hydrogen/Ammonia/Natural Gas Mixtures, Jessica Baker

Electronic Theses and Dissertations, 2020-2023

In recent years, hydrogen-carrying compounds have accrued interest as an alternative to traditional fossil fuels due to their function as zero-emission fuels. As such, there is interest in investigating hydrogen-carrying compounds to improve understanding of the fuels' characteristics for use in high pressure systems. In the current study, the oxidation of ammonia/natural gas/hydrogen mixtures was carried out to study CO formation profiles as well as the ignition delay times behind reflected shock waves in order to refine chemical kinetic models. Experiments were carried out in the University of Central Florida's shock tube facility by utilizing chemiluminescence to obtain OH* emission …

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Analysis Of Shear Failure In Ultra-High Performance Concrete Beams, Kevin Conway Jan 2022

Analysis Of Shear Failure In Ultra-High Performance Concrete Beams, Kevin Conway

Electronic Theses and Dissertations, 2020-2023

Ultra-high performance concrete (UHPC) is an emerging cementitious material type currently undergoing research in different structural applications. This material is characterized by a compressive strength of 150 MPa (22 ksi), according to the Association Francaise de Genie Civil and the Federal Highway Administration, high tension strength, and high durability. Additionally, UHPC consists of secondary reinforcement in the form of steel or polymeric fibers, which enable UHPC to exhibit tension hardening behavior and tension ductility previously ignored in conventional concrete mixes. Previous research has focused on applications in the transportation and bridge design industries; however, applications in buildings and other heavy …

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Prediction And Validation Of Residual Stresses In Additively Manufactured Metal Parts, Jose Mayi Rivas Jan 2022

Prediction And Validation Of Residual Stresses In Additively Manufactured Metal Parts, Jose Mayi Rivas

Electronic Theses and Dissertations, 2020-2023

Selective Laser Melted (SLM) Additively Manufactured (AM) metal parts are of special interest to many industries because their designs can be made arbitrarily complex while still maintaining bulk type mechanical properties. However, the large thermal gradients inherent to the SLM process generate residual stresses (RS) and distortions that are detrimental to the fit, functionality and integrity of parts. Predicting the state of stresses in as-built 3D printed parts is a difficult problem that currently has only been approached with the use of transient thermomechanical Finite Element Models (FEMs). The nonlinearities associated with AM processes are difficult to capture in these …

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Exploring Preservice Teachers' Development Of Collective Mathematics Identity Through Community Building, Paula Santana De Tice Jan 2022

Exploring Preservice Teachers' Development Of Collective Mathematics Identity Through Community Building, Paula Santana De Tice

Electronic Theses and Dissertations, 2020-2023

In recent years, attention to equity and inclusion has rightfully become an essential focus in mathematics education. Given the social nature of mathematics, collaborative learning is one of the instructional strategies with the greatest potential for developing conceptual learning and creative problem-solving, and when facilitated well, has the potential to minimize racial and social biases. However, although the expected outcome of student collaboration is a collective mathematical agency, studies show that for this to happen, it is first necessary to develop among students Collective Mathematics Identity, which are beliefs and dispositions developed by a group of students about their collective …

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The Impact Of A Growth Mindset Intervention On Growth Mindset, Self-Efficacy, & Learning Behaviors Of Adult Esol Learners At A Technical College, Wei-Chun Stiskin Jan 2022

The Impact Of A Growth Mindset Intervention On Growth Mindset, Self-Efficacy, & Learning Behaviors Of Adult Esol Learners At A Technical College, Wei-Chun Stiskin

Electronic Theses and Dissertations, 2020-2023

The purpose of this mixed study was to determine the impact of a growth mindset intervention on adult ESOL learners' growth mindset, self-efficacy, and learning behaviors at a technical college. This study adopted paired samples t test to analyze quantitative component part of the study, including pre and post Growth Mindset Surveys and Self-Efficacy Surveys. For the qualitative component of the study, participants' interview responses were recorded and analyzed to explore their perspectives on the quantitative part of the study. Quantitatively, the findings of the study showed that there was no significant difference between growth mindset intervention and adult ESOL …

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Testing The Influence Of Water Depth In Design Of Created Oyster Reef For Living Shoreline Applications, Peter Vien Jan 2022

Testing The Influence Of Water Depth In Design Of Created Oyster Reef For Living Shoreline Applications, Peter Vien

Electronic Theses and Dissertations, 2020-2023

Living shoreline stabilization has become a popular practice in shoreline restoration and bank protection; however, there are still many uncertainties regarding effective site design using living materials. For example, natural wave-breaks may be formed of created reefs, but the optimum water depth for hydrodynamic influence may differ from the preferred depth to ensure organism recruitment. The objective of this research is to understand how water depth relative to the crest of submerged artificial oyster reef structures influences nearshore hydrodynamic processes and sediment transport or retention in nearshore areas. A field study, sited in a microtidal estuary on the Atlantic coast …

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A Deep Learning Approach For Spatiotemporal-Data-Driven Traffic State Estimation, Amr Hatem Ragaa Abdelraouf Jan 2022

A Deep Learning Approach For Spatiotemporal-Data-Driven Traffic State Estimation, Amr Hatem Ragaa Abdelraouf

Electronic Theses and Dissertations, 2020-2023

The past decade witnessed rapid developments in traffic data sensing technologies in the form of roadside detector hardware, vehicle on-board units, and pedestrian wearable devices. The growing magnitude and complexity of the available traffic data has fueled the demand for data-driven models that can handle large scale inputs. In the recent past, deep-learning-powered algorithms have become the state-of-the-art for various data-driven applications. In this research, three applications of deep learning algorithms for traffic state estimation were investigated. Firstly, network-wide traffic parameters estimation was explored. An attention-based multi-encoder-decoder (Att-MED) neural network architecture was proposed and trained to predict freeway traffic speed …

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Studying The Electrostatic Effects On The Dynamics Of Charged Lunar Dust Via Discrete Element Method, Hao Wang Jan 2022

Studying The Electrostatic Effects On The Dynamics Of Charged Lunar Dust Via Discrete Element Method, Hao Wang

Electronic Theses and Dissertations, 2020-2023

Dust problems raise significant concerns in planetary surface exploration. The unusual behavior of the dust particles that surround the vehicle after engine cutoff has the potential to have more of an influence on surface systems than the high velocity lunar rocket plume ejecta in the landing process. A prevailing hypothesis attributes the levitation and transport of dust particles on the surface of airless bodies to the electrostatic effects and electric field. However, there is no accurate model considering the inter-particle electrostatic interactions, especially when the particles are charged by plume. This dissertation aims to understand the behavior of charged lunar …

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Application Of Biologically Activate Carbon For Treatment Of Sulfide-Laden Groundwater, Jessica Cormier Jan 2022

Application Of Biologically Activate Carbon For Treatment Of Sulfide-Laden Groundwater, Jessica Cormier

Electronic Theses and Dissertations, 2020-2023

Small-system water purveyors must overcome many challenges to provide an adequate and safe water supply to its consuming public. This dissertation reports on research related to the application of biologically activated carbon (BAC) media filters for the treatment of well water to remove disinfection by-product (DBP) precursor matter, measured as dissolved organic carbon (DOC), at two treatment plants serving a small community water system. Four research questions were investigated individually in discrete, yet interconnected studies at two water treatment facilities processing groundwater that contained hydrogen-sulfide (~1.2 mg/L) and dissolved organic carbon (~2.0 mg/L). The first study revealed that BAC filters …

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Compact Lens Technologies: Curved Image Sensor And Volumetric Imaging Efficiency, Zhao Ma Jan 2022

Compact Lens Technologies: Curved Image Sensor And Volumetric Imaging Efficiency, Zhao Ma

Electronic Theses and Dissertations, 2020-2023

Compact image systems bring up people's attention in the field of target recognition, surveillance, situation awareness or even photography. Conventional metrics assess image system based on image quality without considering systems' volume. More comprehensive metrics, such as General Image-Quality Equation and the Targeting Task Performance metric, incorporates all image system components from object, lenses to detector and even imaging processing algorithm. All these key factors prohibit these metrics from being applied to image system in a convenient manner. Here, we propose a simple metric, volumetric imaging efficiency, considering both image quality and volume. Only concentrate on optical lenses enables the …

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Biomimetic Design, Modeling, And Adaptive Control Of Robotic Gripper For Optimal Grasping, Mushtaq Al-Mohammed Jan 2022

Biomimetic Design, Modeling, And Adaptive Control Of Robotic Gripper For Optimal Grasping, Mushtaq Al-Mohammed

Electronic Theses and Dissertations, 2020-2023

Grasping is an essential skill for almost every assistive robot. Variations in shape and/or weight of different objects involved in Activities of Daily Living (ADL) lead to complications, especially, when the robot is trying to grip novel objects for which it has no prior information –too much force will deform or crush the object while too little force will lead to slipping and possibly dropped objects. Thus, successful grasping requires the gripper to immobilize an object with the minimal force. In Chapter 2, we present the design, analysis, and experimental implementation of an adaptive control to facilitate 1-click grasping of …

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Automated Vehicle To Vehicle Conflict Analysis At Signalized Intersections By Camera And Lidar Sensor Fusion, Alabi Mehzabin Anisha Jan 2022

Automated Vehicle To Vehicle Conflict Analysis At Signalized Intersections By Camera And Lidar Sensor Fusion, Alabi Mehzabin Anisha

Electronic Theses and Dissertations, 2020-2023

This research presents an approach for safety diagnosis using sensor fusion techniques. This work fuses the outputs of a roadside low-resolution camera and a solid-state LiDAR. For vehicle classification and detection in videos, the YOLO v5 object detection model was utilized. The raw 3D point clouds generated by the LiDAR are processed by two manual steps - ground plane transformation and background segmentation, and two real-time steps - foreground clustering, and bounding box fitting. Taking the generated 2D bounding boxes of both camera and LiDAR, we associate the common bounding box pairs by thresholding on the Euclidean distance threshold of …

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Development Of A Multivariate Poisson Hidden Markov Model For Application In Educational Data Mining, Shahab Boumi Jan 2022

Development Of A Multivariate Poisson Hidden Markov Model For Application In Educational Data Mining, Shahab Boumi

Electronic Theses and Dissertations, 2020-2023

Managers and policymakers in higher education institutions try to improve graduation rates and decrease halt rates. To achieve this goal, it is important to understand academic and demographic factors that correlate with academic performance. Many studies in the field of education analytics have identified student grade point averages (GPA) as an important indicator and predictor of final academic outcomes (graduating or halting their studies). While semester-to-semester fluctuations in GPA are considered normal, significant changes in academic performance may warrant more thorough investigation and consideration, particularly with regard to final academic outcomes. However, it is challenging to represent complex academic trajectories …

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Student Experiences With University Accessibility Services: A Quantitative Inquiry, Charles Hilston Jan 2022

Student Experiences With University Accessibility Services: A Quantitative Inquiry, Charles Hilston

Electronic Theses and Dissertations, 2020-2023

The purpose of the study was to determine the influence of an accessibility services office on student achievement and cumulative Grade Point Average (GPA). This research was a quantitative exploratory study designed to investigate student experiences with using accessibility services and transitioning into a Major Southeastern University (MSU) in the United States. Participants in the study were actively enrolled undergraduate students with a learning exceptionality. The students that completed the questionnaire answered questions regarding their experiences with using the services provided by the office, along with their experiences with transitioning into the university. The results of this research are intended …

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Humans In Algorithms, Algorithms In Humans: Understanding Cooperation And Creating Social Ai With Causal Generative Models, Lux Miranda Jan 2022

Humans In Algorithms, Algorithms In Humans: Understanding Cooperation And Creating Social Ai With Causal Generative Models, Lux Miranda

Electronic Theses and Dissertations, 2020-2023

Cooperation is the hallmark human trait which has allowed us to congregate into the vast, continent-sprawling societies we live in today. Yet, the precise social, environmental, and cognitive mechanisms which enable this cooperation are not fully understood. Toward this, lucrative insights have been borne through the use of formal computational models of socio-cognitive phenomena: In simulating our own cooperative behavior, we can better deduce the exact factors which cause it. The combined knowledge of these factors and ability to computationally simulate them allows us to further two goals: First, it empowers us with the knowledge of how to modify our …

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Micro-Credentialing Of English Learner Teaching Skills (Melts) Preparation: Teacher Candidates' Use Of Read-Alouds To Support Reading Comprehension For English Learners, Shayla Roberts Jan 2022

Micro-Credentialing Of English Learner Teaching Skills (Melts) Preparation: Teacher Candidates' Use Of Read-Alouds To Support Reading Comprehension For English Learners, Shayla Roberts

Electronic Theses and Dissertations, 2020-2023

Over the past decade, the population of students learning English as a second language in the United States has grown astronomically. Presently, the number of English learners (ELs) across the country has reached 4.8 million and is projected to rise in the coming years. Because of this steadily increasing metric, the demand for effective reading instruction as a critical component of overall academic achievement and learning success is crucial. As such, there is a great need for schools to address the language, literacy, and academic needs of ELs in mainstream classrooms. To address this concern, major responsibilities fall on teachers …

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Engagement In Online Math Courses: An Exploration Into Success Rates Of Professors Who Use Engagement Tools In Online Learning, Shauna Rogan Jan 2022

Engagement In Online Math Courses: An Exploration Into Success Rates Of Professors Who Use Engagement Tools In Online Learning, Shauna Rogan

Electronic Theses and Dissertations, 2020-2023

As more college courses transition to hybrid and fully online models due to Covid-19, the classroom environment for higher education has changed and will continue to do so (Bonk, 2020). As online learning continues to grow, a challenge of not connecting with the instructor can be a concern. Success in the online classroom is possible for students who may feel they are alone in online learning (Holbeck & Hartman, 2018). With the right combination of engagement tools, student interaction with the curriculum, class, and professor result in a meaningful learning experience (Holbeck & Hartman, 2018). The history of online education, …

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Supporting Secondary Teachers' Proof And Justification Of Calculus Concepts Through The Intentional Use Of Dynamic Technology, Shahabeddin Abbaspour Tazehkand Jan 2022

Supporting Secondary Teachers' Proof And Justification Of Calculus Concepts Through The Intentional Use Of Dynamic Technology, Shahabeddin Abbaspour Tazehkand

Electronic Theses and Dissertations, 2020-2023

Learning calculus concepts plays a huge role in understanding phenomena in STEM-related disciplines. Those concepts tend to be dynamic in nature, and the visual exploration and representation of calculus concepts using paper and pencil is limited compared to pedagogically and intentionally using dynamic geometry software. As such, a primary component of this dissertation study involves the integration of dynamic technology. Additionally, previous studies have shown that students have difficulties constructing proofs related to calculus concepts. Despite the existing body of research on students' comprehension of proof and justification, there has not been much focus on teachers' knowledge and perception of …

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Simulation Of A Comprehensive Heat Recovery Steam Generator, Jose Chalarca Castro Jan 2022

Simulation Of A Comprehensive Heat Recovery Steam Generator, Jose Chalarca Castro

Electronic Theses and Dissertations, 2020-2023

With the increasing prevalence of renewables, it is important to optimize combined cycle power plants during transient conditions to better compliment the variable generation of renewable energy generators. There is a demand for dynamic heat recovery steam generators (HRSG) models that may enable improved control designs. Sufficiently accurate real-time simulations of HRSGs may serve as soft sensors and state estimators during transient conditions. Furthermore, real-time simulations of HRSGs can be used for operator training which does not incur the inherit risk of using plant hardware. The focus of this research is on the development towards an integrated dynamic closed loop …

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Impact Of Ethnomodeling Explorations On Secondary Mathematics Pre-Service Teachers' Perceptions Of Teaching And Learning Geometry: A Multi-Case Study, Siddhi Desai Jan 2022

Impact Of Ethnomodeling Explorations On Secondary Mathematics Pre-Service Teachers' Perceptions Of Teaching And Learning Geometry: A Multi-Case Study, Siddhi Desai

Electronic Theses and Dissertations, 2020-2023

Through a focus on the intersection of mathematical modeling, ethnomathematics, and cultural and historical practices, this ethnomodeling research study intentionally connected efforts to engage and value each and every student's culture and identity while emphasizing essential geometry content. The data collection took place at a large Hispanic-serving public metropolitan research university in an undergraduate secondary mathematics education methods course intended for pre-service teachers (PSTs). Over the course of eight weeks PSTs completed a questionnaire and pre-/post-surveys, two individual assignments, three small-group tasks, three task reflections, and a group reflection which were then analyzed using quantitative and qualitative methods. In addition …

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Characterizing The Effects Of Porosity And Particle Size On Tir Emissivity Spectral Features Of Olivine, Ryan Galinkin Jan 2022

Characterizing The Effects Of Porosity And Particle Size On Tir Emissivity Spectral Features Of Olivine, Ryan Galinkin

Electronic Theses and Dissertations, 2020-2023

We generated a series of 15 particulate San Carlos olivine samples with varying porosity and particle size. We created five different particle size distributions and each particle size distribution was prepared with three different packing techniques. These samples were then imaged under a microscope and a binarization thresholding technique was used to determine each sample's surface porosity by the ratio of dark, void pixels to the total number of pixels in each image. Our results show that we could estimate surface porosity from the analysis of a microscopic image, a non-destructive technique. These samples were then placed in the Planetary …

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An Investigation Of The Excess Credit Hour Surcharge Policy And Its Impact On First-Time-In-College Students At A Large Metropolitan University In The State Of Florida, Lynn Grabenhorst Jan 2022

An Investigation Of The Excess Credit Hour Surcharge Policy And Its Impact On First-Time-In-College Students At A Large Metropolitan University In The State Of Florida, Lynn Grabenhorst

Electronic Theses and Dissertations, 2020-2023

An Excess Credit Hour policy "assesses a tuition surcharge for any credits taken beyond a predetermined threshold" (Smith, 2017, para. 1). In 2009, the State of Florida implemented legislation on excess credit hours at four-year public institutions, Fla. Stat. § 1009.286 (State of Florida, 2012). Legislation found under title forty-eight (XLVIII) of the K-20 Education Code, Fla. Stat. § 1009.286, relating to "Educational Scholarships, Fees, and Financial Assistance," discussed the "intent of the Legislature to encourage each undergraduate student who enrolls in a state university to complete the student's respective baccalaureate degree program in the most efficient way possible…" (State …

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Investigating The Intersection Of Teachers' Mathematical Anxiety According To Experience And Instructional Grade Level, Molly Greer Jan 2022

Investigating The Intersection Of Teachers' Mathematical Anxiety According To Experience And Instructional Grade Level, Molly Greer

Electronic Theses and Dissertations, 2020-2023

Teacher instruction in mathematics is a critical cornerstone for effective student learning (Aldrup et al., 2020). Teaching mathematics is essential for the development of student mathematical thinking; a foundational skill required for the majority of careers (Ramirez et al., 2016). Researchers have demonstrated that mathematical anxiety (MA) is prevalent among the general population and is estimated to impact 42% of teachers in elementary education (Aldrup et al., 2020). The impact of MA on teaching, student learning, and overall teacher performance is just beginning to emerge. Yet, researchers have shown MA has implications on the function (Pizzle et al., 2020) and …

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The Lived Experiences Of Faculty In The Covid-19 Pandemic Shift In Instruction, Alison Hammack Jan 2022

The Lived Experiences Of Faculty In The Covid-19 Pandemic Shift In Instruction, Alison Hammack

Electronic Theses and Dissertations, 2020-2023

This study sought to understand the lived experiences of mathematics faculty teaching during the COVID-19 pandemic's rapid shift from on-campus instruction to online education. Faculty are the primary influencers at a college. Their perspectives on the challenges and changes to teaching practices may determine a college's response to improving teaching and learning during a crisis. At the time of the COVID-19 transition, many faculty had no experience creating and teaching an online course, and some had previously been resistant to teaching online. Using a phenomenological approach, nine participants at a large state college were interviewed using the Teacher-Centered Systemic Reform …

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