Digital Commons Network^™

Distributed Element Designs For A Wireless System, Nicholas Anthony Dipisa

Masters Theses

A prototype binary frequency shift keying (BFSK) RF link operating in the 2.4 GHz ISM band was identified as a need for a potential undergraduate engineering laboratory activity. This system would be used to showcase various RF circuit engineering principles and techniques such as controlled trace impedances, frequency mixing, voltage-controlled oscillators, distributed element filters, and power splitters. This investigation focused on designing a prototype system that put a priority on ease of measurement and circuit tuning to help foster a more hands on approach. Each major circuit element was broken into separate PCBs to increase the modularity of the design …

Factors Students Consider In The Decision Making Process For Graduate Education, Kiley Sturm

Masters Theses

Using a qualitative methodology, the researcher studied the factors students consider in the decision making process for graduate education. Through conducting two focus groups that contained a total of thirteen participants, the researcher identified the factors that were the most significant to their decision making during the decision making process for pursuing graduate education, applying to institutions, and the selection and enrollment at their institution. The researcher also identified reasons affecting the students' decision of when to pursue graduate education and how their undergraduate experience impacted the decision making process.

The Development And Implications Of Social Studies And History Curricula In Ghana, Razak Kwame Dwomoh

Masters Theses

Current research shows the social studies taught at lower grade levels in Ghana incorporates minimal historical content, and Ghana's history in the curricula may fade away without careful considerations. This study examined the development of the social studies subject within the curricula within Ghana, the quantity and quality of historical content prevalent in the middle and high-level schools' curricula. The study was an extrapolation of the U.S. curricula, and juxtaposed with Ghana. Qualitatively, data were collected through Face-Time interviews of participants. Participants comprised 41 social studies and history teachers and administrators at the middle and high schools in the Akuapem …

Hidden Symmetries In Classical Mechanics And Related Number Theory Dynamical System, Mohsin Md Abdul Karim

Masters Theses

Classical Mechanics consists of three parts: Newtonian, Lagrangian and Hamiltonian Mechanics, where each part is a special extension of the previous part. Each part has explicit symmetries (the explicit Laws of Motion), which, in turn, generate implicit or hidden symmetries (like the Law of Conservation of Energy, etc). In this Master's Thesis, different types of hidden symmetries are considered; they are reflected in the Noether Theorem and the Poincare Recurrence Theorem applied to Lagrangian and Hamiltonian Systems respectively.

The Poincare Recurrence Theorem is also applicable to some number theory problems, which can be considered as dynamical systems. In …

Juxtaposing Primary- And Intermediate-Elementary Trade Books’ Historical Representation Of Amelia Earhart, Rachael A. Burkhardt

Masters Theses

Amelia Earhart can be used in the classroom not only to interest students but can also be used to cover Common Core State Standards (CCSS), National Council for the Social Studies (NCSS) framework, and Next Generation Science Standards (NGSS). When teaching Amelia Earhart, textbooks, trade books, and primary sources can be used, however one must be careful with the misrepresentations each resource can portray. To look at what is misrepresented, omitted, and included within primary and intermediate grade level trade books, 32 books were scrutinized. The trade books being analyzed were found to have some historically representative and misrepresentative elements …

Variation In Leaf Morphology Of An Alpine Shrub Community Along Environmental Gradients, Abdulssalam Khafsha

Masters Theses

Mountains represent complex environment gradients which strongly affect local temperature regimes and rainfall. These changes in climate conditions drive a diversity of plant responses. As alpine environments are expected to change dramatically in response to climate change, understanding plant responses to environmental variation is critical in these environments. Although they are a critical component of alpine communities, the environmental responses of shrubs have been much less examined than trees, representing an important knowledge gap. Leaves, as the primary photosynthetic organs on plants, would be expected to respond strongly to local climate conditions. In this study, I documented how the leaf …

The Effectiveness Of Personalized Competency-Based Education On Student Engagement At The Secondary Level, Amanda Newmes

Masters Theses

EFFECTIVENESS OF PCBE ON STUDENT ENGAGEMENT ii

Abstract

This study examines the impact of Personalized Competency-Based Education (PCBE) on student engagement across varying ethnicities and grade levels. Personalized Competency-Based Education is built upon the premise that student learning should be based upon the following characteristics: learning is student-owned, learning accommodates flexible pacing, learning shows demonstration of proficiency, students track their own progress, and students determine their own learning pathways and goals. Since current research is limited on the impact of PCBE, especially at the secondary level of education, further study is needed in order to determine how PCBE implementation will …

Synthesis, Characterization And Mechanistic Studies Of Biomimetic Dinuclear Copper(Ii) Complexes, Millaniyage Nuwanthaka Prasad Jayaweera

Masters Theses

Dinuclear copper complexes are significant synthetic targets due to their use as model compounds for the active sites of type 3 copper proteins like catechol oxidase. A distinct class of ligands used in these studies are built on a phenol core to witch various donor side-arms were appended at the 2 and 6 positions of the arene ring. In our quest to quantify the influence of electron donating or withdrawing groups attached to the central arene ring, we have designed a set of ligands that, upon coordination to copper(II) centers, would produce complexes of the general structure. During this research …

Developing A Basket-Shaped Host Molecule Based On P-Tert-Butylcalix[4]Arene Featuring Urea Groups For Encapsulating Volatile Guest Molecules, Lokugama Widanelage Vidula Priyadarshana

Masters Theses

Molecular baskets are a group of synthetic host molecules which are designed to govern the inclusion of small guest molecules. The basic structural features of basket-shaped host molecules are a cavity for holding a much smaller guest molecule and tunable gates for keeping the guest molecule inside. These types of gates can be tuned by changing temperature, concentration, pH, etc. In this research group's previous study, a molecular basket of cal ix[ 4]arene with carboxylic acid groups was synthesized by functionalizing calix[4]arene's phenol hydroxyl groups with benzyl bromide building blocks. In the study detailed here, 1 , l '-((5-(bromomethyl)-1,3-phenylene)bis(methylene))bis(3-isopropylurea) was …

Studying Carbon Dioxide Solvent Properties By Microwave Spectroscopic Investigations Of Vinyl Fluoride/Carbon Dioxide Clusters And Developing New Approaches To Decode Rotational Spectra, Prashansa Kannangara

Masters Theses

Supercritical carbon dioxide (sc-C0₂) is an excellent green solvent, but its properties are not thoroughly understood. For example, fluorinated compounds have higher than expected solubility in sc-C0₂. Microwave spectroscopy is one way to learn more about sc-C0₂ because it can be used to determine detailed structures of small clusters of molecules. The purpose of this investigation was to study weak hydrogen bonding interactions in complexes of fluorinated ethylene (solute) with carbon dioxide (C0₂, solvent). Investigations on dimers with one C0₂ molecule and fluorinated ethylene were carried out previously and found two different …

Modeling Of Optimized Neuro-Fuzzy Logic Based Active Vibration Control Method For Automotive Suspension, Mohammad Adom Safiullah

Masters Theses

In this thesis, an active vibration control system was developed. The control system was developed and tested using a quarter car model of an adaptive suspension system. For active vibration control, an actuator was implemented in addition to the commonly used passive spring damper system. Due to nature of unpredictability of force required two different fuzzy inference system (FIS) were developed for the actuator. First a sequential fuzzy set was built, that resulted lower vertical displacement compared to basic damper spring model, but system had limited effect with disturbances of higher magnitude and continuous vibrations (rough road). To improve the …

Exploration For Alteration Halos Around The Ag-W Deposits In Southeastern Missouri, Usa, Daniel Joseph Warbritton

Masters Theses

"The St. Francois Mountains in SE Missouri are an extensive terrane of granitic ring complexes and associated rhyolites. They were an important source of Ag, W, and Sn and mined intermittently from the 1800s until the 1950s. The Ag-W ores occur in the Silvermine Granite and rhyolite roof rocks. The deposits are classified as a xenothermal ore system with mineralization occurring in quartz veins and surrounding greisen (up to 2.5 m). Exploration for hydrothermal ore deposits often focuses on the identification of alteration halos in the surrounding host rocks. In the vast majority of xenothermal ore deposits, such as in …

Single Parent Households And The Effect On Student Learning, Asia Watt

Masters Theses

The purpose of this research is to examine if there is a relationship between single-parent households and the effect on student learning. A total of seven parents and three elementary teachers took a survey. Students’ scores in math and reading from report cards and PARCC scores were also used as data sources. Results revealed that the involvement of single parents at school varies depending on the type of involvement, however, data from the report card review showed all the parents review their child’s report card. Approximately 70 % or more assisted their children in math and English homework. In addition, …

Solvation Properites Of Supercritical Carbon Dioxide Using Chirped-Pulse Fourier-Transform Microwave Spectra Of Carbon Dioxide / 1, 1-Difluoroethene (Dfe) Mixtures, Tulana Ariyaratne Subasinghe Arachchige

Masters Theses

Supercritical carbon dioxide (sc-C0₂) is a highly utilized industrial substance identified as an excellent solvent and a surfactant, which is cheaper and less hazardous than other typical solvents. The higher solubility of fluorinated hydrocarbons than their hydrocarbon (HC) analogs is not well understood and the theory behind the microsolvation of sc-C0₂ cannot be fully explained with the existing chemical information. Microwave spectroscopy is a good method of identifying the structural arrangement of clusters made from fluorinated HCs and C0₂. I n this project, microwave scans of the four different mixtures of 1 , 1-difluoroethene (DFE) …

Pokemon Go And Mental Health, Nathaniel Ed

Masters Theses

Pokémon GO is a new type of game that emphasizes physical activity and social interaction. In the literature, both physical activity and social interactions have been shown to be positively correlated with mental health. Much research has been conducted on the effects of gaming on mental health, but to date no research has been done on the possible correlations of the game Pokémon GO and mental health. The present study was conducted to determine whether Pokémon GO players scored significantly lower than a control group of traditional garners on scales of depression, anxiety, and pathological gaming, and if they reported …

The Transition Of Male Student-Athletes To A Division I College, Tori Harrison

Masters Theses

Using a qualitative methodology, the researcher studied high school student-athletes transitioning to becoming college student-athletes at the Division I-level. The study was narrowed down to six, second-year male student-athletes. There were two participants from baseball, two from football, and two from men's track and field. These participants were interviewed and asked a range of questions about their high school experience, their legal guardians' involvement in high school and in college, what their recruiting process was like, and how they managed their transition from high school to college. The interview was broken up into three parts to better understand their transition: …

Using Digital Storytelling To Create Intercultural Awareness At Eastern Illinois University, Toluwalase Solomon

Masters Theses

Despite the increasing enrollment of international students at Eastern Illinois University (EIU), little is known about the integration of international students into the larger community. This creative thesis employs photovoice as a form of digital storytelling to amplify the voices of international students at EIU. Over an 8-week period, 7 international students from Cameroon, India, Ghana, Philippines, South-Korea, China, and France and the researcher captured images that told their stories of acculturation and socio-cultural adjustment in EIU. The main goal of this project is to improve college wide understanding on the actual lived experiences of international students in Eastern Illinois …

Exploring High School Students' Attitudes Towards Reading, Heather G. Crivilare

Masters Theses

This study explored high school students’ attitudes towards reading as both a recreational activity and academic endeavor; while there are numerous studies regarding the reading habits of younger children, there is a deficit of research into the reading habits of students beyond the middle school years. This study surveyed and interviewed freshmen-through-senior students in a medium-sized, rural Illinois high school about their habits as readers in order to explore the relationship between different environmental factors and reading, as well as between reading habits and college readiness. This study found a gender gap in reading enjoyment favoring female students; a decline …

The Impact Of Academic Enablers Instruction On Academic Achievement Of Elementary School Children, Bryce Kirk

Masters Theses

The present study investigated the relationship between Academic Enablers (AEs) instruction and student achievement. Specifically, whether such behaviors and attitudes explicitly taught in a small group setting would improve students' academic performance. Students struggle academically and behaviorally for a variety of reasons, poor or lack of instruction, lack of motivation, or related to a disability, to recognize a few. Existing literature has identified several factors, (e.g., interpersonal/social skills, motivation, study skills, and engagement), known as AEs, that meaningfully contribute toward students' academic success. However, unlike previous studies that focused on such AEs in isolation, this study addressed this limitation and …

Income Inequality And Political Survival In Countries Around The World, Sahan Shrestha

Masters Theses

There are many factors that influence whether a political leader exits out of office or remains in power. In this thesis, we evaluate the impact of one important factor, income inequality, on the survival prospects of the leader using data for 152 countries for the period 1962 - 2015. We use a linear probability model, a logit model, and a Cox Proportional Hazard Model, all of which indicate that higher income inequality increases the probability of leader survival. To address the potential endogeneity of income inequality, I use a simultaneous equations model and the results hold. The results are also …

Students Reception Of Ethnic Diversity Topics From White And Non-White Faculty, Cobi Christiansen

Masters Theses

The purpose of the study is to investigate the phenomenon of the student population being more ethnically diverse than the teacher population as well as examining student perceptions of ethnic diversity topics based on their perceptions of faculty ethnicity. A quantitative using a survey method was designed to investigate students' reception of ethnic diversity topics from White and Non-white faculty. From three different institutions in Central Illinois, 141 undergraduate education students, which included students who are majoring in early childhood, elementary, or secondary education as well as students who are receiving teaching certificates with their majors, participated in this study. …

Middle School Mathematics Teachers' Perceptions Of Opportunities And Challenges, Shelby Eversole

Masters Theses

This study investigates the perspectives of opportunities and challenges of middle school mathematics’ teachers. To gain these perspectives, an ethnographic study was conducted by interviewing four middle school mathematics teachers in central Illinois. The results of this study imply that teachers of different backgrounds and teaching environments have varying perspectives about challenges and opportunities in the classroom. Limitations of this study include but are not limited to, the researcher having one year to conduct the research, only four teachers from two schools being interviewed, interviewees teaching different grade levels, no rural setting involvement, one educator having little teaching experience, teachers’ …

Impacts Of Plant-Microbe Interactions On Seedling Performance In A Riparian Forest Invaded By Lonicera Maackii, Taylor E. K. Strehl

Masters Theses

Soil microbes have profound impacts on plant growth and survival and can either promote or inhibit plant dominance. Exotic plants are often strongly invasive because they have escaped their natural enemies, potentially including antagonistic soil microbes. I examined how the invasive shrub Lonicera maackii and a common native tree, Acer negundo, responded to soil microbial communities to determine the role of soil microbes in regulating invasion success. This was done by growing both species with microbes from invaded (L. maackii) and uninvaded (A. negundo) soils collected from three locations within a riparian forest. Seedlings were …

Identifying Priority Conservation Areas And Strategies For Myotis Sodalis (Chiroptera: Vespertilionidae) Via Habitat And Connectivity Modeling, Ashleigh B. Cable

Masters Theses

Myotis sodalis, the Indiana bat, is a federally endangered bat species in the United States of America (USA). Conservation efforts are typically focused at identified maternity sites at local scales, however, the species is a regional migrant that interacts with its environment at multiple spatial scales. We are limited in our knowledge of landscape-level requirements of this species, especially in large areas such as Illinois, USA, where a wide range of environmental and landscape conditions exist. Many previous M. sodalis habitat studies have limited their focus to smaller spatial scales. Due to limitations in funding, personnel, and time, it …

Synthesis Toward A Molecular Container Based On P-Tert-Butylcalix[4]Arene With Gate Features, Balasooriya Appuhamilage Dinesh Madushan Balasooriya

Masters Theses

Nowadays molecular and supramolecular chemistry have endless examples for the development of smart devices. Among those applications, nano-baskets of calixarenes play vital roles in host-guest chemistry. One of the main appealing concepts of this field is the development of host molecules with gate features. These hosts are designed and constructed for the delivery of chemical or biochemical species that are volatile, or reactive, or sensitive to normal solution environment and they are mainly functioned by predefined groups that are responsive toward stimuli such as concentration, temperature, pH and so on. In our previous study, we found that benzyl bromides can …

Complex Varieties As Minima, Richard Koss

Masters Theses

We will explore various numeric methods of finding roots of an analytic function over some open set of the complex plane. We will discuss a method of visually observing the roots, a gradient descent method for finding the roots of an analytic function, a gradient descent method for solving systems of analytic functions, and finally a method of descent that uses osculating circles to find roots of an analytic function. Of particular interest to this thesis are roots of complex polynomials. There will be examples, code snippets, and outputs of programs to illustrate all of these methods.

The Impact Of Dutch Disease: The Case Of Nigeria, Halimat Atinuke Laguda

Masters Theses

Nigeria, over the years, has been showing a rapid appreciation of the domestic currency, a rise in real wages and the service sector and a slow-down in the industrial production which are all signs of presence of Dutch disease which predicts that a country with large natural resource rents may experience a de-industrialization and a lower long term economic growth. This paper analyses the impact of Dutch disease in Nigeria Ordinary Least square method, Two-Stage Least Square and Autoregressive Distributed Lag with a system of equation from 1981 to 2017 and found that the real wage rate emphasizes on the …

Gifted Education In Elementary Schools, Danielle Wilkinson

Masters Theses

Gifted students have enormous potential, yet there are few consistent opportunities for gifted students to receive challenging instruction. Drawing upon literature detailing the history of gifted education nationally and in Illinois, this study sought to find what services were currently offered to Illinois students, and if the opportunities for gifted students were related to a district’s state funding tier. Findings indicated that the elementary gifted services being offered and the ways in which eligibility is determined were inconsistent among districts. In addition, many districts who offer gifted services are using local/community funds in order to provide services regardless of their …

Computational Fluid Dynamics Modeling Of Proppant Static Settling Velocity In High Viscosity Friction Reducers, Chen Yuan

Masters Theses

"In the current petroleum fracturing industry, it is necessary to understand the downhole migration and settling velocity of the proppant. If we can master this information well, it will be a great help to obtain effective propped fracture conductivity. In order to study the transport of proppants in the well, we used laboratory experiments and computer numerical simulations to compare the results to get a meaningful conclusion. We spent a lot of time building models on a powerful computer and comparing the experimental conclusions. We finally decided to use computational fluid dynamics (CFD) as the simulation platform, discrete phase method …

Amplitude-Preserved Processing Of The Blackfoot 10 Hz Seismic Data, Bader Mohammed A Algarni

Masters Theses

"The broadband 3C-2D seismic survey was acquired in the Blackfoot Field in southern Alberta. The single-component 10 Hz geophone data were reprocessed to increase vertical resolution and provide a better seismic image of the incised valley channel fill deposits in the Glauconitic Formation. The amplitude-preserved seismic processing of the data was followed by the Kirchhoff prestack time migration. The processing parameters and algorithms used were based on parameter optimization approach. Elevation statics and surface consistent residual statics were utilized to remove near surface delays in the data. Seismic noise, such as ground roll and air blast, were attenuated effectively by …