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Integration And Cross-Coupling Of A Notched-Turbine Symbiotic Power Source For Implantable Medical Devices, Samuel Perez Apr 2018

Integration And Cross-Coupling Of A Notched-Turbine Symbiotic Power Source For Implantable Medical Devices, Samuel Perez

Graduate Theses and Dissertations

The purpose of this research is to design and integrate a symbiotic notched-turbine energy generator for implantation as a cross-coupled system capable of continuously and perpetually powering an electronic implantable medical device (IMD), which is a device designed to operate inside the body of a higher mammal to enhance, correct or provide the body with a function that has deviated from the norm or has stopped altogether. The list of IMDs available for implantation keeps growing every year, one of the newest being the VBLOC, produced by EnteroMedics®, and approved by the Food and Drug Administration (FDA) on January 15th ...


Computational Discovery Of Energetic Polynitrogen Compounds At High Pressure, Brad A. Steele Apr 2018

Computational Discovery Of Energetic Polynitrogen Compounds At High Pressure, Brad A. Steele

Graduate Theses and Dissertations

High-nitrogen-content energetic compounds containing multiple N-N bonds are an attractive alternative towards developing new generation of environmentally friendly, and more powerful energetic materials. High-N content translates into much higher heat of formation resulting in much larger energy output, detonation pressure and velocity upon conversion to large amounts of non-toxic, strongly bonded N2 gas. This thesis describes recent advances in the computational discovery of group-I alkali and hydrogen polynitrogen materials at high pressures using powerful first-principles evolutionary crystal structure prediction methods. This is highlighted by the discovery of a new family of materials that consist of long-sought after all-nitrogen N􀀀 5 ...


Engineering In The Elementary Science Classroom: Teachers' Knowledge And Practice Of The Nature Of Engineering, Jacob Pleasants Jan 2018

Engineering In The Elementary Science Classroom: Teachers' Knowledge And Practice Of The Nature Of Engineering, Jacob Pleasants

Graduate Theses and Dissertations

This dissertation focuses on the nature of engineering (NOE) as an objective of engineering education efforts within the context of K-12 science education in the United States. The dissertation examines the NOE knowledge and teaching practices of participants in a research project aimed at supporting science and engineering instruction in grades 3-5. The project formed teaching triads of elementary student teachers, their cooperating teachers, and engineering graduate students. The engineers served as content area experts in science and engineering, areas which elementary teachers often have little preparation. Together with the teaching expertise of the student teachers and cooperating teachers, these ...


An Assessment Tool To Determine The Appropriateness Of Engineering Design Projects For Gender Bias, Ambiguity, And Major Relatedness, Shubham Prashant Khoje Jan 2018

An Assessment Tool To Determine The Appropriateness Of Engineering Design Projects For Gender Bias, Ambiguity, And Major Relatedness, Shubham Prashant Khoje

Graduate Theses and Dissertations

Engineering design learning is one of the critical components for an engineering

degree; thus, engineering design projects are commonly included in engineering curricula

to help students cultivate design thinking and creative problem-solving skills. However,

an engineering design project is prone to the following issues if it is not appropriately

provided to engineering students. First, gender bias can occur when the design project is

perceived to be more skewed to one gender in comparison to the other. Second, major

relatedness can occur when the discipline of the design project is not related to the chosen

major and interest areas of a ...


Organometal Halide Perovskite Solar Absorbers And Ferroelectric Nanocomposites For Harvesting Solar Energy, Chaminda Lakmal Hettiarachchi Nov 2017

Organometal Halide Perovskite Solar Absorbers And Ferroelectric Nanocomposites For Harvesting Solar Energy, Chaminda Lakmal Hettiarachchi

Graduate Theses and Dissertations

Organometal halide perovskite absorbers such as methylammonium lead iodide chloride (CH3NH3PbI3-xClx), have emerged as an exciting new material family for photovoltaics due to its appealing features that include suitable direct bandgap with intense light absorbance, band gap tunability, ultra-fast charge carrier generation, slow electron-hole recombination rates, long electron and hole diffusion lengths, microsecond-long balanced carrier mobilities, and ambipolarity. The standard method of preparing CH3NH3PbI3-xClx perovskite precursors is a tedious process involving multiple synthesis steps and, the chemicals being used (hydroiodic acid and methylamine) are ...


Understanding Gas Sorption Mechanisms In Metal–Organic Materials Via Computational Experimentation, Katherine A. Forrest Nov 2017

Understanding Gas Sorption Mechanisms In Metal–Organic Materials Via Computational Experimentation, Katherine A. Forrest

Graduate Theses and Dissertations

Metal–organic materials (MOMs), a type of porous crystalline structure composed of organic ligands jointed with metal ions, have captured the interest of scientists as potentially useful in gas sorption applications. Some of the most crucial avenues of investigation are in H2 storage (for use as a clean burning fuel source) and CO2 capture and sequestration (to remove the greenhouse gas from the environment).

A major advantage of MOMs for such applications is their high variability in terms of physical dimensions and chemical moieties, based on composition and synthesis conditions, making them potentially customizable for specific application if necessary structural ...


Applicability Of Online Education To Large Undergraduate Engineering Courses, Devayan Debashis Bir Jan 2017

Applicability Of Online Education To Large Undergraduate Engineering Courses, Devayan Debashis Bir

Graduate Theses and Dissertations

With the increase in undergraduate engineering enrollment, many universities have chosen to teach introductory engineering courses such as Statics of Engineering and Mechanics of Materials in large classes due to budget limitations. With the overwhelming literature against traditionally taught large classes, this study aims to see the effects of the trending online pedagogy. Online courses are the latest trend in education due to the flexibility they provide to students in terms of schedule and pace of learning with the added advantage of being less expensive for the university over a period. In this research, the effects of online lectures on ...


Student Motivation And Academic Success: Examining The Influences, Differences, And Economics Of Mechatronic Experiences In Fundamental Undergraduate Courses, John R. Haughery Jan 2017

Student Motivation And Academic Success: Examining The Influences, Differences, And Economics Of Mechatronic Experiences In Fundamental Undergraduate Courses, John R. Haughery

Graduate Theses and Dissertations

In this study, we examined influences, differences, meanings, and economics of mechatronic experiences in a first-year, fundamental technology course. Our first objective examined the primary and secondary influences of mechatronic experiences on student engagement. Using a systematic review methodology, we collected n=402 articles. Screened by title and abstract, we mapped six parent and 22 child codes to the remaining n=137 articles. From these, we appraised n=17 studies, assessing eight as high quality. Our synthesis included these n=8 articles, from which we identified five primary influences (Student Motivation, Self-Efficacy, Course Rigor, Learning Retention, and Gender) and two ...


Mixed Methods Assessment Of Project-Based Learning In A Senior-Level Highway Design Course, Steven Kurtis Younkin Jan 2017

Mixed Methods Assessment Of Project-Based Learning In A Senior-Level Highway Design Course, Steven Kurtis Younkin

Graduate Theses and Dissertations

The lack of practical real-world applications in a classroom setting has been identified as one factor inhibiting student interest in STEM fields. Project-based learning (PBL) directly addresses this concern by providing an opportunity for students to complete an extensive, semester-long project that mirrors professional practice. In addition, PBL allows students an opportunity to refine related soft skills, such as technical writing and oral communication. This study involved the redevelopment of a senior-level highway design course using a PBL framework that largely reflects professional practice. A questionnaire survey was distributed to public and private road agencies in order to assess the ...


20-20 Listening: A Sound Documentary Dedicated To The Study Of Listening Experiences In Acoustic Environments, Julian Andres Osorio Jan 2016

20-20 Listening: A Sound Documentary Dedicated To The Study Of Listening Experiences In Acoustic Environments, Julian Andres Osorio

Graduate Theses and Dissertations

The intersection of sound and design is an exciting and complex space for artistic experimentation and research. My approach for this work was to design, write, record and mix seven podcast episodes that narrate my analysis and interpretation of how we listen to sounds and interpret their meaning. Each episode is dedicated to one topic, and presents multiple sound samples that illustrate my take on the subject. The episodes cover the basics of listening, how sound conveys information about objects in environments and how soundscapes are ubiquitous. They include how the music, sounds and noises in film convey meaning, represent ...


Identity Theft Education: Comparison Of Text-Based And Game-Based Learning, Susan Helser Jan 2016

Identity Theft Education: Comparison Of Text-Based And Game-Based Learning, Susan Helser

Graduate Theses and Dissertations

Identity theft continues to grow. It drains a host of valuable resources from Society. Trust is affected. Identity theft can upend an individual’s life and well-being. In the business sector financial losses consume profit and jeopardize the stability of industry. New and complementary approaches to combat the crime are needed.

This research examines two educational methods, one text-based and the other game-based, designed to present information about identity theft. For this purpose I developed Fight Identity Theft (FIT) software. In addition to collecting demographic information, pre- and post-survey responses and feedback data, FIT provides two educational modules. The program ...


Engineering Leadership: Important Themes Identified By Recruiters Of Entry-Level Engineers, Beth Lin Hartmann Jan 2016

Engineering Leadership: Important Themes Identified By Recruiters Of Entry-Level Engineers, Beth Lin Hartmann

Graduate Theses and Dissertations

The purpose of this study was to investigate leadership requirements from the standpoint of prospective employers for full-time, entry-level engineering positions and create a survey instrument to evaluate them. Using the sequential exploratory mixed methods approach, the researchers used emerging qualitative data to inform the development of the quantitative survey instrument.

The qualitative phase of this study sought to understand if industry needs for leadership for two engineering undergraduate populations are the same or different. An analysis was first performed on job postings in the engineering career services database of job postings at a large Midwestern university. The two engineering ...


Exploring The Role Of Large-Scale Immersive Computing Environments In Collaboration Between Engineering And Design Students, Meisha Nicole Rosenberg Jan 2015

Exploring The Role Of Large-Scale Immersive Computing Environments In Collaboration Between Engineering And Design Students, Meisha Nicole Rosenberg

Graduate Theses and Dissertations

In order to solve the engineering challenges of today, multidisciplinary collaboration is essential. Unfortunately there are many obstacles to communication between disciplines, such as incongruent vocabularies and mismatched knowledge bases, which can make collaboration difficult. The silos separating disciplines, created through focused educational curriculum, are also a large barrier. During their education, designers and engineers are encouraged to employ specific methods unique to their discipline to share ideas with their peers. In many cases, however, these methods do not translate between disciplines, making it challenging for two groups to exchange ideas and perspectives effectively. There are, however, some tools that ...


The Efficient Classroom: How Team-Based Learning And Lecture Video Acceleration Affect The Learning Efficiency And Effectiveness Of A First-Year Engineering Course, Benjamin Paul Jacobson Jan 2015

The Efficient Classroom: How Team-Based Learning And Lecture Video Acceleration Affect The Learning Efficiency And Effectiveness Of A First-Year Engineering Course, Benjamin Paul Jacobson

Graduate Theses and Dissertations

This paper researches the impact of the team-based learning (TBL) pedagogy and video lecture viewing strategies on an introductory engineering course. Teaching an introductory engineering course is a complex task because the students vary greatly in ability and experience. As the demand for engineers grows, emphases are placed on introductory engineering courses to effectively and efficiently educate the student in order to prepare them for their future engineering coursework and career. TBL, especially with the use of video lectures, has shown promise as an educational tool for a broad variety of students, but more research is needed. This paper describes ...


A Game-Based Learning Approach To Increase Female Participation In Science, Technology, Engineering, And Mathematics Fields, Desmond Carletus Bonner Jan 2015

A Game-Based Learning Approach To Increase Female Participation In Science, Technology, Engineering, And Mathematics Fields, Desmond Carletus Bonner

Graduate Theses and Dissertations

The game Sorceress of Seasons was developed to teach fundamental concepts of python programming to middle school students with the goal of increasing enthusiasm in the Science, Technology, Engineering, and Mathematics (STEM) fields, especially for middle school female students.

Currently there is a significant lack of professionals in STEM fields in the United States. Specifically, women are underrepresented in STEM fields, despite making up half of the workforce. Career interests are often developed in the middle school years; thus increase the pool of STEM professionals, , it is necessary to spark interest in STEM at an early age.

A Game based ...


Algae: Opportunities For Biomass Feedstock Production, Wastewater Treatment And Educational Outreach, Trina Cassandra Halfhide May 2014

Algae: Opportunities For Biomass Feedstock Production, Wastewater Treatment And Educational Outreach, Trina Cassandra Halfhide

Graduate Theses and Dissertations

Algae are a diverse group of simple organisms that lack roots, stems or leaves and are able to use sunlight, carbon dioxide, and nutrients to produce complex compounds, such as carbohydrates, proteins and lipids. These compounds, especially lipids, are highly sought-after by agricultural, nutraceutical and energy interests. Although there is great potential for algae derived biofuels, there are technical and economic challenges associated with their cultivation. Relevant to this dissertation, the environmental impacts associated with algae cultivation can be reduced by using municipal and agricultural wastewaters as a water and nutrient source. This research was divided into three sections to ...


The Use Of Formative Assessments In Traditional And Hybrid Lecture-Labs Of Industrial Engineering Undergraduates And Their Motivational Profiles, Sarah Gidlewski Jan 2014

The Use Of Formative Assessments In Traditional And Hybrid Lecture-Labs Of Industrial Engineering Undergraduates And Their Motivational Profiles, Sarah Gidlewski

Graduate Theses and Dissertations

BACKGROUND Online learning is one way to increase the quality and accessibility of STEM higher education. Most previous research on online learning suffers from methodological deficiencies and doesn't focus on STEM undergraduates (Bowen, 2012).

PURPOSE/HYPOTHESIS The aim of this study was to examine the relationships between the mode of viewing a lecture, participants' motivational profiles, the use of a formative assessment or not on a laboratory exercise, and participants' performance on the laboratory exercise and summative assessment.

DESIGN/METHOD Students in a freshman and sophomore industrial engineering class were randomly assigned to watch a lecture either live or ...


Assessing Engineering Students' Demonstration Of Workplace Competencies In Experiential Learning Environments Through Internships And Cooperative Work Experiences, Mark A. Laingen Jan 2014

Assessing Engineering Students' Demonstration Of Workplace Competencies In Experiential Learning Environments Through Internships And Cooperative Work Experiences, Mark A. Laingen

Graduate Theses and Dissertations

This study investigates the relationships between supervisor assessments and internship students' self-assessments for 15 workplace competencies, demonstrated in an internship or cooperative work environment. The 15 workplace competencies were developed by Iowa State University in collaboration with over 200 constituents comprised of Iowa State University COE alumni, engineering employers, COE faculty, partnering international faculty, and COE students, to provide clear, independent, and assessable measures for the eleven learning outcomes identified in the ABET Criterion 3 (a-k) outcomes. The study investigated workplace competency assessment data collected over ten years, commencing with the fall 2001 internship assessment term and concluding with the ...


Future Engineering Professors' Conceptions Of Learning And Teaching Engineering, Ana Teresa Torres Ayala Feb 2013

Future Engineering Professors' Conceptions Of Learning And Teaching Engineering, Ana Teresa Torres Ayala

Graduate Theses and Dissertations

Conceptions of learning and teaching shape teaching practices and are, therefore, important to understanding how engineering professors learn to teach. There is abundant research about professors' conceptions of teaching; however, research on the conceptions of teaching of doctoral students, the future professors, is scarce. Furthermore, there is a need to understand not just future engineering professors' conceptions of teaching but also their conceptions of learning. The purpose of this study was to explore qualitative variations in future engineering professors' conceptions of learning and teaching as well as understanding how they came to these conceptions.

The research questions that guided this ...


Assessing Appropriate Technology Handwashing Stations In Mali, West Africa, Colleen Claire Naughton Jan 2013

Assessing Appropriate Technology Handwashing Stations In Mali, West Africa, Colleen Claire Naughton

Graduate Theses and Dissertations

Proper hand hygiene is the most effective and efficient method to prevent over 1.3 million deaths annually from diarrheal disease and Acute Respiratory Infections (ARIs). Hand hygiene is also indispensable in achieving the fourth Millennium Development Goal (MDG) to reduce the childhood mortality rate by 2/3rds between 1990 and 2015. Handwashing has been found in a systematic review of studies to reduce diarrhea by 47%#37; and is, thus, capable of preventing a million deaths (Curtis et. al., 2003). Despite this evidence, hand washing rates remain seriously low in the developing world (Scott et al., 2008).

This study ...


Development Of Novel Nano-Composite Membranes As Introduction Systems For Mass Spectrometers: Contrasting Nano-Composite Membranes And Conventional Inlet Systems, Luis Miranda Jan 2013

Development Of Novel Nano-Composite Membranes As Introduction Systems For Mass Spectrometers: Contrasting Nano-Composite Membranes And Conventional Inlet Systems, Luis Miranda

Graduate Theses and Dissertations

This dissertation presents the development of novel nano-composite membranes as introduction systems for mass spectrometers. These nano-composite membranes incorporate anodic aluminum oxide (AAO) membranes as templates that can be used by themselves or modified by a variety of chemical deposition processes. Two types of nano-composite membranes are presented. The first nano-composite membrane has carbon deposited within the pores of an AAO membrane. The second nano-composite membrane is made by coating an AAO membrane with a thin polymer film. The following chapters describe the transmission properties these nano-composite membranes and compare them to conventional mass spectrometry introduction systems. The nano- composite ...


Science Of Self: Self-Authorship, Social Capital And Women Exploring Careers In Engineering, Wanda Synstelien Jan 2013

Science Of Self: Self-Authorship, Social Capital And Women Exploring Careers In Engineering, Wanda Synstelien

Graduate Theses and Dissertations

This paper establishes a theoretical framework that will support a qualitative study of young women who, in their second year of college, struggled with and ultimately determined a career path after first considering engineering as both a vocational choice and an identity. Establishing Baudrillard (1995) as the primary theorist for this constructivist qualitative analysis, the intersection of self-authorship as defined by Magolda (2007) and social capital as defined by Yosso (2005) will be investigated as the theoretical basis for which to begin an affective understanding. Additionally, basic literature on diverse women in STEM (Science, Technology, Engineering, and Mathematics) will be ...


Training Methods For Visual Inspection Tasks, Alexander John Clemons Jan 2013

Training Methods For Visual Inspection Tasks, Alexander John Clemons

Graduate Theses and Dissertations

The visual inspection process in the casting industry is a subjective task. Inspectors are often required to make absolute judgments when deciding to classify a casting as acceptable or in need of re-work. Due to this subjectivity, castings can be incorrectly classified as acceptable or scheduled for unnecessary re-work, leading to longer production times or higher costs. It is of interest for both manufacturers and customers of the casting industry to improve the visual inspection process. This research was performed with the goal of using an inspection strategy based on rastering to improve the success of a visual inspection task ...


How Engineers Learn: A Study Of Problem-Based Learning In The Engineering Classroom And Implications For Course Design, Robert Mayer Jan 2013

How Engineers Learn: A Study Of Problem-Based Learning In The Engineering Classroom And Implications For Course Design, Robert Mayer

Graduate Theses and Dissertations

This paper presents two studies in the methods of problem-based learning (PBL), where students work in small groups to explore specific problems under the guidance of an instructor. PBL has proven to be highly-effective in engineering education, but there is still room to improve. PBL opponents charge that the unstructured learning environment characteristic of PBL is contrary to cognitive theories on how people learn. Proponents of PBL argue that it is designed to offer just enough structure that students will succeed at learning the material. Studies by Schmidt et al. (2007) suggest that the use of "scaffolds," structures that support ...


Practical Motion Planning For Aerial-Like Virtual Agents In Meta!Blast: A Full And Complex Three Dimensional Virtual Environment, Princess Campbell Jan 2012

Practical Motion Planning For Aerial-Like Virtual Agents In Meta!Blast: A Full And Complex Three Dimensional Virtual Environment, Princess Campbell

Graduate Theses and Dissertations

Motion planning, or enabling agents to navigate around a virtual environment autonomously, is an essential requirement for video games and simulations. A well implemented motion planning technique can create a realistic and immersive user experience. If motion planning is not implemented properly, agents will exhibit unrealistic behavior and cause a distraction for the user. Motion planning is often difficult to implement due to the agents' movement capabilities and the complexity of the virtual environment in which the agents exist. In a traditional three dimensional video game in which the agents are bound by gravity, the agents' motion takes place mostly ...


Engineering Transfer Student Leavers: Voices From The Sidelines Of The Engineering Playing Field, Mary Elizabeth Darrow Jan 2012

Engineering Transfer Student Leavers: Voices From The Sidelines Of The Engineering Playing Field, Mary Elizabeth Darrow

Graduate Theses and Dissertations

The purpose of this phenomenological study was to understand and illuminate the experiences and stories of Midwestern Community College transfer students who entered and left engineering at a large Midwestern research university. Participants were invited based the following selection criteria: (1) Midwestern Community College transfer students who enter engineering; (2) completion of Calculus I and II, Physics, Chemistry, English I and II prior to transferring; (3) stayed in engineering at least 2 semesters; and (4) left engineering in the Fall 2010, Spring 2011, or Fall 2011 semesters for another major.

Eight students participated in this qualitative study. The researcher encouraged ...


Academic And Social Integration Variables Influencing The Success Of Community College Transfer Students In Undergraduate Engineering Programs, Marcia Rae Laugerman Jan 2012

Academic And Social Integration Variables Influencing The Success Of Community College Transfer Students In Undergraduate Engineering Programs, Marcia Rae Laugerman

Graduate Theses and Dissertations

ABSTRACT

The goal of this dissertation is to collect and analyze data to determine success strategies for community college (CC) transfers to engineering. It does so by analyzing transcript level data collected longitudinally over a 10-year period as community college transfer students' progress before and after transfer into an engineering program. Characteristics of successful students are identified in terms of the academic and social integration variables using descriptive and inferential statistics. In addition to providing data analysis, the results determine distinctive strategies to increase the success of community college transfers in engineering.

The research was funded by the National Science ...


Training Development For Pavement Preservation: Chip Sealing And Fog Sealing, Angel Daniel Morandeira Jan 2012

Training Development For Pavement Preservation: Chip Sealing And Fog Sealing, Angel Daniel Morandeira

Graduate Theses and Dissertations

The benefits of pavement preservation are only achieved if properly selected, designed, and applied. In some cases there is a lack of training when conducting one of these steps and the objective of applying pavement preservation techniques gets hampered. Literature on pavement preservation is extensive, but from a training point of view there is no structured approach on how to train people for selecting, designing, and applying pavement preservation techniques.

The objective of the research is to develop a training learning management system that addresses pavement preservation treatments (chip seals, fog seals, slurry systems, and crack seals and fills) as ...


Investigating The Role Of The Internet In Women And Minority Stem Participation: A Case Study Of Two Florida Engineering Programs, Arland Nguema Ndong Jan 2011

Investigating The Role Of The Internet In Women And Minority Stem Participation: A Case Study Of Two Florida Engineering Programs, Arland Nguema Ndong

Graduate Theses and Dissertations

Despite our awareness of the fascination modern humans have with the Internet, little is known about how and why colleges and universities create and maintain Websites. At the most general level, in this case study, I hypothesize that university Websites serve as communication and marketing tools in attracting students. At the most specific level, I postulate that civil engineering programs with Web pages depicting images of women and minorities would be more successful in recruiting and retaining women and students of color than civil engineering programs with Web pages displaying fewer or no images of women and minorities. The primary ...