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1. The Broader Impacts of an Additive Manufacturing Course at Three Large Universities

   Maloney, Patricia ; Cong, Weilong ; Zhang, Meng ; Li, Bingbing ( June 2020 , Proceedings of the American Society for Engineering Education)

   This paper documents the effects of an additive manufacturing course on two sets of students: (1) the undergraduates who took the course and (2) the middle and high school students who visited our labs. At the time of the conference, nine semesters of data (three years at three schools) will have been collected, as well as data from the middle and high school students who visited our labs. Overall, our research questions were: (1) what is the effect of this course on the content knowledge of (a) enrolled undergraduates and (b) middle and high school students? And (2) what is the effect of this course on the attitudes towards engineering and self-efficacy in engineering for (a) enrolled undergraduates and (b) middle and high school students? To determine the answers, our longitudinal matched-pairs data collection was conducted. In short, as measured by t-test, all students improved on content knowledge (p<.01), but female students improved slightly more than male students (+9.89 versus +9.01, respectively). Undergraduates did not change their minds about the factors that are important in engineering, although they did significantly change their self-efficacy ratings in some skills because of the course. In particular, undergraduates rated themselves higher in teamwork, creativity,more »and technical skills, which reflect the content and focus of the course. Additionally, we brought multiple field trips of middle and high school students into our labs for outreach. Using a simplified version of the metric described above, we can see that all students improved on content knowledge.« less
2. The Cumulative Effects of an NSF-Funded Additive Manufacturing Course at Three Large State Universities and Their Surrounding Communities

   Maloney, Patricia. ; Cong, Weilong. ; Zhang, Meng. ; Li, Bingbing. ( August 2022 , Proceedings ASEE annual conference)

   This paper is the culmination of four years of an NSF-funded project implementing and assessing an undergraduate additive manufacturing course at three large state universities: Texas Tech University, Kansas State University, and California State University – Northridge. The research questions addressed are: (1) What are the changes in skill and knowledge concerning additive manufacturing experienced by undergraduate students? (2) What is the effect of this course on attitudes towards engineering and self-efficacy in engineering for enrolled undergraduate students? The sample consists of four years of data from the undergraduate students enrolled in the course at all three universities (combined N = 196). Our method for data collection was matched-pair surveys that contained both (i) an assessment for content knowledge and (ii) an attitudinal assessment previously validated in published research for data collection about attitudes towards engineering. Matched-pair surveys means that we collected data from Student X at Time 1 (before being taught) and then again from at Time 2 (after being taught) and are able to directly compare any change in content knowledge or attitude within the same person. We also collected demographic information to be able to see whether changes in, for example, women differed from those in men.more »All undergraduates experienced statistically significant increases in content knowledge and additive manufacturing skills. In an intriguing finding, female students outperformed male students, which fits with the research that indicates that engineering courses which emphasize pragmatic and real-world applications, as well as those that use group work, will disproportionately help underserved engineering populations like women and people of color succeed. Fitting with the above finding, undergraduates noted that they perceived that they had increased in teamwork, communication, and computer programming skills. These gains were particularly high in female students and students of color.« less
3. Assessing the Results of an Additive Manufacturing Course at Three Large Universities on Undergraduates and High School Students

   https://doi.org/10.18260/1-2--32475  

   Maloney, Patricia A ; Cong, Weilong ; Zhang, Meng ; Li, Bingbing ( June 2019 , 2019 ASEE Annual Conference & Exposition)

   Additive manufacturing (AM) is prevalent in academic, industrial, and layperson use for the design and creation of objects via joining materials together in a layer upon layer fashion. However, few universities have an undergraduate course dedicated to it. Thus, using NSF IUSE support [grant number redacted for review] from the Exploration and Design Tier of the Engaged Student Learning Track, this project has created and implemented such a course at three large universities: Texas Tech (a Carnegie high research productivity and Hispanic Serving Institution), Kansas State (a Carnegie high research productivity and land grant university) and California State, Northridge (the largest of all the California State campuses and highly ranked in serving underprivileged students). Our research team includes engineering professors and a sociologist trained in assessment and K-12 outreach to determine the effects of the course on the undergraduate and high school students. We are currently in year two of the three years of NSF support. The course focuses on the fundamentals of the three families of prevailing AM processes: extrusion-based, powder-based, and liquid-based, as well as learning about practical solutions to additive manufacturing of common engineering materials including polymers, metals and alloys, ceramics, and composites. It has a lecturemore »plus lab format, in that students learn the fundamentals in a classroom, but then apply and broaden their knowledge in lab projects and independent studies. Additionally, as outreach, we host field trips from local high schools during which the undergraduates give presentations about discrete AM skills, then lead the high school students through a lab project focused on those skills. This creates a pipeline of knowledge about AM for younger students as well as an opportunity for undergraduates to develop leadership and speaking skills while solidifying their knowledge. We are also in the process of uploading videos and lab projects to an online Google Classroom so that those with access to 3D printers in other areas can learn online for free. We are also self-publishing an accompanying textbook and lab manual. Beyond the course itself, one of the innovations of our project is the assessment strategy. For both undergraduates and high school students, we have been able to collect content area knowledge both before and after the class, as well as information about their attitudes towards engineering and self-efficacy beliefs. This has been particularly illuminating in regards to subgroups like women and students of color. Our research questions include: i) what is the knowledge growth about AM during this course? ii) does this differ by university? iii) does this differ by gender or race? iv) what are the best ways to make this course portable to other universities? Preliminary results indicate a statistically significant improvement in knowledge for all students. This was particularly true for women, which may indicate the promise of AM courses in decreasing the female dropout rate in engineering. Attitudes towards engineering and self-efficacy perceptions also differed after the class, but in varying ways by demographic subgroups and university. This will be explored more in the paper.« less
4. An Introductory Aeronautics Course for Pre-Engineering Students to Understand How Drones (Flying Robots) Work

   He, S. ( June 2023 , The 130th ASEE Annual Conference and Exposition, June 25-28, 2023, Baltimore, MD)

   Robotics has emerged as one of the most popular subjects in STEM (Science, Technology, Engineering, and Mathematics) education for students in elementary, middle, and high schools, providing them with an opportunity to gain knowledge of engineering and technology. In recent years, flying robots (or drones) have also gained popularity as teaching tool to impart the fundamentals of computer programming to high school students. However, despite completing the programming course, students may still lack an understanding of the working principle of drones. This paper proposes an approach to teach students the basic principles of drone aeronautics through laboratory programming. This course was designed by professors from Vaughn College of Aeronautics and Technology for high school students who work on after-school and weekend programs during the school year or summer. In early 2021, the college applied for and was approved to offer a certificate program in UAS (Unmanned Aerial Systems) Designs, Applications, and Operations to college students by the Education Department of New York State. Later that year, the college also received a grant from the Federal Aviation Administration (FAA) to provide tuition-free early higher education for high school students, allowing them to complete the majority of the credits in the UASmore »certificate program while still enrolled in high school. The program aims to equip students with the hands-on skills necessary for successful careers as versatile engineers and technicians. Most of the courses in the certificate program are introductory or application-oriented, such as Introduction to Drones, Drone Law, Part 107 License, or Fundamentals of Land Surveying and Photogrammetry. However, one of the courses, Introduction to Drone Aeronautics, is more focused on the theory of drone flight and control. Organizing the lectures and laboratory of the course for high school students who are interested in pursuing the certificate can be a challenge. To create the Introduction to Drone Aeronautics course, a variety of school courses and online resources were examined. After careful consideration, the Robolink Co-drone [1] was chosen as the experimental platform for students to study drone flight, and control and stabilize a drone. However, developing a set of comprehensible lectures proved to be a difficult task. Based on the requirements of the certificate program, the lectures were designed to cover the following topics: (a) an overview of fundamentals of drone flight principles, including the forces acting on a drone such as lift, weight, drag, and thrust, as well as the selection of on-board components and trade-offs for proper payload and force balance; (b) an introduction to the proportional-integral-directive (PID) controller and its role in stabilizing a drone and reducing steady-state errors; (c) an explanation of the forces acting on a drone in different coordinates, along with coordinate transformations; and (d) an opportunity for students to examine the dynamic model of a 3D quadcopter with control parameters, but do not require them to derive the 3D drone dynamic equations. In the future, the course can be improved to cater to the diverse learning needs of the students. More interactive and accessible tools can be developed to help different types of students understand drone aeronautics. For instance, some students may prefer to apply mathematical skills to derive results, while others may find it easier to comprehend the stable flight of a drone by visualizing the continuous changes in forces and balances resulting from the control of DC motor speeds. Despite the differences in students’ mathematical abilities, the course has helped high school students appreciate that mathematics is a powerful tool for solving complex problems in the real world, rather than just a subject of abstract numbers.« less
5. Undergraduates’ Perspectives on Readiness, Writing Transfer, and Effectiveness of Writing Instructions in Engineering Lab Report Writing

   St.Clair, Sean ; Kim, Dave ; Riley, Charles ( June 2021 , 2021 ASEE Annual Conference Proceedings)

   Engineering undergraduates’ academic writing experiences prior to entry-level engineering lab courses can be classified into three different groups: a group with both rhetorically-focused writing (e.g., first-year-composition) and technical writing courses; a group with only rhetorically-focused writing courses; and a group with no rhetorically-focused writing or technical writing courses. Using a lens of transfer theories that explain how much knowledge from one context is used or adapted in new contexts, these three groups can be called concurrent, vertical, and absent transfer groups respectively. This study, which is part of a larger project developing and implementing writing-focused modules in engineering labs, aims to investigate undergraduates’ perspectives on readiness, writing transfer, and effectiveness of writing instructions in engineering lab report writing through a student survey. End-of-term online surveys (n = 40) of undergraduates in entry-level engineering lab courses were collected from three distinctive universities: an urban, commuter, public research university; an urban, private, teaching-focused university; and a rural, public, teaching-focused university. The survey questions have three parts: 1) student perspectives in writing in engineering disciplines; 2) how students use prior writing knowledge when writing lab reports in engineering lab courses; and 3) how engineering lab course writing instructions impact students’ engineering lab reportmore »writing. Findings suggest that the three transfer groups present statistical distinctions on the readiness of writing engineering lab reports (concurrent group as the highest and absent group as the lowest). The three groups also show different perspectives on how their freshmen writing courses contributed their engineering lab report writing. The concurrent transfer group believed freshmen writing instruction regarding “focus on purpose” contributed most when they write lab reports, while the greatest number of vertical transfer group students mentioned “knowledge about format and structure” was most helpful. Many absent transfer students valued “identifying problems or questions” instructed from their freshmen writing-intensive philosophy course as the content they used most when writing lab reports. Ultimately, the analysis of the data suggested that despite their perceived preparedness for writing lab reports, most of the students felt their skills improved as a result of engaging in lab report writing activities.« less