Engineering Commons^™

The Association Between Tolerance For Ambiguity And Fear Of Negative Evaluation: A Study Of Engineering Technology Capstone Courses, Sergey I. Dubikovsky

Open Access Dissertations

For many students in engineering and engineering technology programs in the US, senior capstone design courses require students to form a team, define a problem, and find a feasible technical solution to address this problem. Students must integrate the knowledge and skills acquired during their studies at the college or university level. These truly integrative design activities do not have a single “correct” solution. Instead, there is an array of solutions, many of which could be used to achieve the final result. This ambiguity can cause students to experience anxiety during the projects.

This study examined the main topics: • …

Race, Class And Gender In Engineering Education: A Quantitative Investigation Of First Year Enrollment, Canek Moises Luna Phillips

Open Access Dissertations

Research explanations for the disparity across both race and gender in engineering education has typically relied on a deficit model, whereby women and people of color lack the requisite knowledge or psychological characteristics that Whites and men have to become engineers in sufficient numbers. Instead of using a deficit model approach to explain gender and race disparity, in the three studies conducted for this dissertation, I approach gender and race disparity as the result of processes of segregation linked to the historic and on-going perpetuation of systemic sources of oppression in the United States. In the first study, I investigate …

Conceptual Understanding Of Threshold Concepts Of Electrical Phenomena: Mental Models Of Senior Undergraduates In Electrical Engineering, Mark T. Carnes

Open Access Dissertations

Every field of study has a set of domain-specific concepts that anyone who desires to work in that field must know and understand. Most students who pursue university degrees in engineering trust that their education is designed to provide them with this knowledge. But does it? In electrical engineering (EE), conceptual understanding of electrical phenomena has rarely been addressed. Even though the presumed goal of instructors and students alike is to learn the concepts of electrical phenomena well enough to be able to use the concepts to design useful things, it is difficult to determine whether this goal is being …

Carbon Nanotube Thermal Interfaces And Related Applications, Stephen L. Hodson

Open Access Dissertations

The development of thermal interface materials (TIMs) is necessitated by the temperature drop across interfacing materials arising from macro and microscopic irregularities of their surfaces that constricts heat through small contact regions as well as mismatches in their thermal properties. Similar to other types of TIMs, CNT TIMs alleviate the thermal resistance across the interface by thermally bridging two materials together with cylindrical, high-aspect ratio, and nominally vertical conducting elements. Within the community of TIM engineers, the vision driving the development of CNT TIMs was born from measurements that revealed impressively high thermal conductivities of individual CNTs. This vision was …

Students' Explanations In Complex Learning Of Disciplinary Programming, Camilo Vieira

Open Access Dissertations

Computational Science and Engineering (CSE) has been denominated as the third pillar of science and as a set of important skills to solve the problems of a global society. Along with the theoretical and the experimental approaches, computation offers a third alternative to solve complex problems that require processing large amounts of data, or representing complex phenomena that are not easy to experiment with. Despite the relevance of CSE, current professionals and scientists are not well prepared to take advantage of this set of tools and methods. Computation is usually taught in an isolated way from engineering disciplines, and therefore, …

Methods To Facilitate Community Participation In Humanitarian Engineering Projects: Laying The Foundation For A Learning Platform, Andrea Mazzurco

Open Access Dissertations

Humanitarian engineering (HE) is a new interdisciplinary field that is rapidly emerging worldwide. Many not-for-profit organizations such as Engineers Without Borders, Practical Action, and International Development Enterprise have been flourishing with the goal of providing technological solutions to those who need them the most. In engineering programs across the U.S., HE, service-learning, community engagement, and similar programs are gaining popularity because they offer an efficient way to meet ABET accreditation criteria, while also teaching valuable technical and professional skills to engineering students. However, the cultural, social, and political differences among communities and engineers often add degrees of difficulty that cannot …

From Mechanic To Designer: Evolving Perceptions Of Elementary Students Over Three Years Of Engineering Instruction, Anastasia M. Rynearson

Open Access Dissertations

Due in part to increasing state standards that require engineering in K-12 curricula and the Next Generation Science Standards’ incorporation of engineering outcomes, inclusion of engineering into elementary classrooms is on the rise. Teacher development and experiences in learning about and implementing engineering have been studied, but elementary students’ experiences when learning about engineering have not been explored.

The purpose of this study is to address the question: How do elementary students’ knowledge of, attitudes toward, and overall conceptions of engineering evolve over three years of engineering instruction?

This study follows seven elementary school students through three years of engineering …

Development Of First-Year Engineering Teams' Mathematical Models Through Linked Modeling And Simulation Projects, Kelsey Joy Rodgers

Open Access Dissertations

The development and use of mathematical models and simulations underlies much of the work of engineers. Mathematical models describe a situation or system through mathematics, quantification, and pattern identification. Simulations enable users to interact with models through manipulation of input variables and visualization of model outputs. Although modeling skills are fundamental, they are rarely explicitly taught in engineering. Model-eliciting activities (MEAs) represent a pedagogical approach used in engineering to teach students mathematical modeling skills through the development of a model to solve an authentic problem.

This study is an investigation into the impact of linking a MEA and a simulation-building …

Promoting Teaming Metacognition, Lee Kemp Rynearson

Open Access Dissertations

Improving students’ capacity to effectively perform teaming skills is a crucial outcome for engineering education, and has been the subject of considerable prior and ongoing research. Based upon review of research on teaming, it was hypothesized that greater awareness of appropriate opportunities to use teaming skills in authentic contexts would lead to greater teaming skills employment over time. Further, it was hypothesized that greater psychological safety in student teams would lead to more students choosing to employ appropriate teaming skills over time. An intervention to achieve such increases could therefore be expected to promote student teaming skills performance improvement. Seeking …

Learning The Language Of Academic Engineering: Sociocognitive Writing In Graduate Students, Catherine G. P. Berdanier

Open Access Dissertations

Although engineering graduate programs rarely require academic writing courses, the indicators of merit in academic engineering, such as journal publications, successful grants, and doctoral milestones (e.g. theses, dissertations) are based in effective written argumentation and disciplinary discourse. Further, graduate student attrition averages 57% across all disciplines, with some studies classifying up to 50% of these students as “ABD” (All But Dissertation.) In engineering disciplines specifically, graduate attrition rates across the U.S. average 36% (both Master’s and PhD students), according to the Council of Graduate Schools. The lack of socialization is generally noted as a main reason for graduate attrition, one …

A Standards-Based Grading Model To Predict Students' Success In A First-Year Engineering Course, Farshid Marbouti

Open Access Dissertations

Using predictive modeling methods, it is possible to identify at-risk students early in the semester and inform both the instructors and the students. While some universities have started to use standards-based grading, which has educational advantages over common score-based grading, at–risk prediction models have not been adapted to reap the benefits of standards-based grading. In this study, seven prediction models were compared to identify at-risk students in a course that used standards-based grading. When identifying at-risk students, it is important to minimize false negative (i.e., type II) errors while not increasing false positive (i.e., type I) errors significantly. To increase …

Understanding How Adults Approach Technological Challenges: A Sequential Mixed Methods Research, Mariana Tafur Arciniegas

Open Access Dissertations

People from all backgrounds engage with technology in their everyday lives. There is, however, a gap in the public's understanding of technology and limited research on how engineers and non-engineers approach technological challenges. Prior studies have focused on the public's understanding of technology but limited research has been conducted on how people deal with technological challenges as part of their everyday lives. Studying how individuals with non-STEM backgrounds engage with technology will contribute a more comprehensive understanding of strategies for closing the technological literacy gap. Taking into account that technology developments rapidly occur, lifelong learning skills are another critical dimension …

Difficulty As A Concept Inventory Design Consideration: An Exploratory Study Of The Concept Assessment Tool For Statics (Cats), Dana L. Denick

Open Access Dissertations

The ability for engineering students to apply mathematic, scientific and engineering knowledge to real-life problems depends greatly on developing deep conceptual knowledge that structures and relates the meaning of underlying principles. Concept inventories have emerged as a class of tests typically developed for use in higher education science and engineering courses. Concept Inventories (CIs) are multiple-choice tests that are designed to assess students' conceptual understanding within a specific content domain. For example, the CI explored within this study, the Concept Assessment Tool for Statics (CATS) is intended to measure students' understanding of the concepts underlying the domain of engineering statics. …

Understanding The Rhetorical Engineer, Zachery W Koppelmann

Open Access Dissertations

The purpose of this dissertation is to describe the development of the Purdue School of Mechanical Engineering Writing Enhancement Program and its definition of good engineering writing. Based on the work with the Mechanical Engineering Faculty and the Writing Enhancement Program, it was determined that good engineering writing is aware of its need to address specific rhetorical contexts and expectations. The Writing Enhancement Program was created to provide additional writing instruction to undergraduate mechanical engineering students Purdue University. Its development did not follow standard writing across the curriculum methods; it was developed following a modified writing center methodology. The modifications …

Engineering Community Engagement Partnerships: Investigating Motivation, Nature, And Structure, Julia D. Thompson

Open Access Dissertations

Engineering community engagement programs have increased in popularity over the last decade or so, with related research and scholarship in this area focused primarily on student motivation and learning outcomes. Since 2000, however, the wider service-learning field has started investigating partnerships and community voice. Building from the existing service-learning literature, this study aims to better understand community-university partnerships in engineering community engagement programs from the perspectives of both the academic program and the served community. This study addresses three research questions: (1) Why are individuals and local community organizations involved in engineering service-learning partnerships?, (2) How does engineering community engagement …

Engineering Students At Typically Invisible Transition Points: A Focus On Admissions And The Sophomore Year, Elizabeth M. Holloway

Open Access Dissertations

As of 2012, women are approximately 19% of all engineering undergraduate students nationally (American Society for Engineering Education, 2012). Women's representation in engineering has not changed significantly over the last 20 years, despite increased attention, increased funding, and increased programmatic activities intended to encourage more women to become engineers. Research around the world continues to seek identification of the reasons for the underrepresentation of women in engineering. This prior work has focused primarily on two broad areas: recruiting, that is, preparation, socialization, exposure, and experiences prior to college; and retention, that is, experiences in higher education. Retention studies and programmatic …

Student Success: Approaches To Modeling Student Matriculation And Retention, Jien-Jou Lin

Open Access Dissertations

Every year a group of graduates from high schools enter the engineering programs across this country with remarkable academic record. However, as reported in numerous studies, the number of students switching out of engineering majors continues to be an important issue. Previous studies have suggested various factors as predictors for student retention in engineering. To assist the engineering students with timely advising early in their program, an effective prediction model of matriculation and retention in engineering that use available student data are highly desirable.

In the first part of this work, the author developed new prediction models of student retention …

How Engineering Innovators Characterize Engineering Innovativeness: A Qualitative Study, Daniel Michael Ferguson

Open Access Dissertations

The use of science and engineering skills to address the problems of modern society is regarded as an economic strategy in developed countries across the world. However, business and political leaders in the United States feel that we, as a society, do not understand that new global competition can match and even outpace us on innovation. Many of the studies on innovators are not specific to engineers. This study filled a gap in the understanding of what characteristics constitute innovative behavior in engineers.

The purpose of this study was to explore engineers' views of innovation and innovators who create and …