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1. Favoring Complexity: A Mixed Methods Exploration of Factors That Influence Concept Selection When Designing for Additive Manufacturing

   https://doi.org/10.1115/1.4050303  

   Prabhu, Rohan ; Leguarda, Rainmar L. ; Miller, Scarlett R. ; Simpson, Timothy W. ; Meisel, Nicholas A. ( October 2021 , Journal of Mechanical Design)

   null (Ed.)

   Abstract The capabilities of additive manufacturing (AM) open up designers’ solution space and enable them to build designs previously impossible through traditional manufacturing (TM). To leverage this design freedom, designers must emphasize opportunistic design for AM (DfAM), i.e., design techniques that leverage AM capabilities. Additionally, designers must also emphasize restrictive DfAM, i.e., design considerations that account for AM limitations, to ensure that their designs can be successfully built. Therefore, designers must adopt a “dual” design mindset—emphasizing both, opportunistic and restrictive DfAM—when designing for AM. However, to leverage AM capabilities, designers must not only generate creative ideas for AM but also select these creative ideas during the concept selection stage. Design educators must specifically emphasize selecting creative ideas in DfAM, as ideas perceived as infeasible through the traditional design for manufacturing lens may now be feasible with AM. This emphasis could prevent creative but feasible ideas from being discarded due to their perceived infeasibility. While several studies have discussed the role of DfAM in encouraging creative idea generation, there is a need to investigate concept selection in DfAM. In this paper, we investigated the effects of four variations in DfAM education: (1) restrictive, (2) opportunistic, (3) restrictive followed by opportunistic (R-O), and (4) opportunistic followed by restrictive (O-R), on students’ concept selection process. We compared the creativity of the concepts generated by students to the creativity of the concepts they selected. The creativity of designs was measured on four dimensions: (1) uniqueness, (2) usefulness, (3) technical goodness, and (4) overall creativity. We also performed qualitative analyses to gain insight into the rationale provided by students when making their design decisions. From the results, we see that only teams from the restrictive and dual O-R groups selected ideas of higher uniqueness and overall creativity. In contrast, teams from the dual R-O DfAM group selected ideas of lower uniqueness compared with the mean uniqueness of ideas generated. Finally, we see that students trained in opportunistic DfAM emphasized minimizing build material the most, whereas those trained only in restrictive DfAM emphasized minimizing build time. These results highlight the need for DfAM education to encourage AM designers to not just generate creative ideas but also have the courage to select them for the next stage of design. 

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2. Design by taking perspectives: How engineers explore problems

   https://doi.org/10.1002/jee.20263  

   Murray, Jaclyn K. ; Studer, Jaryn A. ; Daly, Shanna R. ; McKilligan, Seda ; Seifert, Colleen M. ( June 2019 , Journal of Engineering Education)

   Problem exploration includes identifying, framing, and defining design problems and bounding problem spaces. Intentional and unintentional changes in problem understanding naturally occur as designers explore design problems to create solutions. Through problem exploration, new perspectives on the problem can emerge along with new and diverse ideas for solutions. By considering multiple problem perspectives varying in scope and focus, designers position themselves to increase their understandings of the “real” problem and engage in more diverse idea generation processes leading to an increasing variety of potential solutions.

   The purpose of this study was to investigate systematic patterns in problem exploration in the early design phases of mechanical engineers.

   Thirty‐five senior undergraduate students and experienced designers with mechanical engineering backgrounds worked individually following a think‐aloud protocol. They explored problems and generated solutions for two of four randomly assigned design problems. After generating solutions, participants framed and rewrote problem statements to reflect their perspectives on the design problem their solutions addressed. Thematic analysis and a priori codes guided the identification of problem exploration patterns within and across problems.

   The set of patterns in engineers' problem exploration that emerged from the analysis documents alternative strategies in exploring problems to arrive at solutions. The results provide evidence that engineering designers, working individually, apply both problem‐specific and more general strategies to explore design problems.

   Our study identified common patterns in the explorations of presented problems by individual engineering designers. The observed patterns, described as Problem Exploration Perspectives, capture alternative approaches to discovering problems and taking multiple problem perspectives during design. Learning about Problem Exploration Perspectives may be helpful in creating alternative perspectives on a design problem, potentially leading to more varied and innovative solutions. This paper concludes with an extended example illustrating the process of applying Problem Exploration Perspectives to move between problem perspectives to generate varied design outcomes.

    

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3. Favoring Complexity: A Mixed Methods Exploration of Factors that Influence Concept Selection in Design for Additive Manufacturing

   Prabhu, R. ; Leguarda, R. ; Miller, S. R. ; Simpson, T. W. ; Meisel, N. A. ( August 2020 , ASME International Design Engineering Technical Conferences)

   The capabilities of additive manufacturing (AM) open up designers’ solution space and enable them to build designs previously impossible through traditional manufacturing. To leverage AM, designers must not only generate creative ideas, but also propagate these ideas without discarding them in the early design stages. This emphasis on selecting creative ideas is particularly important in design for AM (DfAM), as ideas perceived as infeasible through the traditional design for manufacturing lens could now be feasible with AM. Several studies have discussed the role of DfAM in encouraging creative idea generation; however, there is a need to understand concept selection in DfAM. In this paper, we investigated the effect of two variations in DfAM education: 1) restrictive DfAM and 2) dual DfAM (opportunistic and restrictive) on students’ concept selection process. Specifically, we compared the creativity of the concepts generated by the students to the creativity of the concepts selected by them. Further, we performed qualitative analyses to explore the rationale provided by the students in making these design decisions. From the results, we see that teams from both educational groups select ideas of greater usefulness; however, only teams from the restrictive DfAM group select ideas of higher uniqueness and overall creativity. Further, we see that introducing students to opportunistic DfAM increases their emphasis on the complexity of designs when evaluating and selecting them. These results highlight the need for DfAM education to encourage AM designers to not just generate but also select creative ideas. 

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4. Engaging Civil Engineering Students through a “Capstone-like” Experience in their Sophomore Year

   https://doi.org/10.18260/1-2--34539  

   Sarasua, Wayne ; Kaye, Nigel ; Ogle, Jennifer ; Benaissa, Mehdi ; Benson, Lisa ; Putman, Bradley ; Pfirman, Aubrie ( June 2020 , 2020 ASEE Virtual Annual Conference)

   null (Ed.)

   Many university engineering programs require their students to complete a senior capstone experience to equip them with the knowledge and skills they need to succeed after graduation. Such capstone experiences typically integrate knowledge and skills learned cumulatively in the degree program, often engaging students in projects outside of the classroom. As part of an initiative to completely transform the civil engineering undergraduate program at Clemson University, a capstone-like course sequence is being incorporated into the curriculum during the sophomore year. Funded by a grant from the National Science Foundation’s Revolutionizing Engineering Departments (RED) program, this departmental transformation (referred to as the Arch initiative) is aiming to develop a culture of adaptation and a curriculum support for inclusive excellence and innovation to address the complex challenges faced by our society. Just as springers serve as the foundation stones of an arch, the new courses are called “Springers” because they serve as the foundations of the transformed curriculum. The goal of the Springer course sequence is to expose students to the “big picture” of civil engineering while developing student skills in professionalism, communication, and teamwork through real-world projects and hands-on activities. The expectation is that the Springer course sequence will allow faculty to better engage students at the beginning of their studies and help them understand how future courses contribute to the overall learning outcomes of a degree in civil engineering. The Springer course sequence is team-taught by faculty from both civil engineering and communication, and exposes students to all of the civil engineering subdisciplines. Through a project-based learning approach, Springer courses mimic capstone in that students work on a practical application of civil engineering concepts throughout the semester in a way that challenges students to incorporate tools that they will build on and use during their junior and senior years. In the 2019 spring semester, a pilot of the first of the Springer courses (Springer 1; n=11) introduced students to three civil engineering subdisciplines: construction management, hydrology, and transportation. The remaining subdisciplines will be covered in a follow-on Springer 2 pilot.. The project for Springer 1 involved designing a small parking lot for a church located adjacent to campus. Following initial instruction in civil engineering topics related to the project, students worked in teams to develop conceptual project designs. A design charrette allowed students to interact with different stakeholders to assess their conceptual designs and incorporate stakeholder input into their final designs. The purpose of this paper is to describe all aspects of the Springer 1 course, including course content, teaching methods, faculty resources, and the design and results of a Student Assessment of Learning Gains (SALG) survey to assess students’ learning outcomes. An overview of the Springer 2 course is also provided. The feedback from the SALG indicated positive attitudes towards course activities and content, and that students found interaction with project stakeholders during the design charrette especially beneficial. Challenges for full scale implementation of the Springer course sequence as a requirement in the transformed curriculum are also discussed. 

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5. Implementing Transmedia Using a Narrative Framework for an Introductory Engineering Course

   Pina, Jeremiah ; Ellis, Glenn W. ; Mazur, Rebecca ( January 2023 , ASEE Annual Conference proceedings)

   This paper details the process of developing and adapting a narrative framework for teaching an introductory geotechnical engineering course (EGR 340) through a systematic iterative procedure that embeds conceptual learning into a story format and, over time, elaborates elements and interactions within the story using methods of transmedia storytelling. Although the tools are presented within the context of geotechnical engineering, the approach can be applied throughout engineering education. The elaborative transmedia storytelling process we describe is based on the Imaginative Education (IE) teaching approach. Well-grounded in the learning sciences--but novel in engineering education--IE facilitates student engagement through the use of cognitive tools (such as extremes of reality, heroism, and the exploration of binaries). These tools are connected to types of understanding and serve to enhance a sense of mystery and wonder for topics that might not otherwise register as being immediately relevant to students. A significant benefit of this approach is that that it lends itself to modification and personalization through the inclusion of new features and methods of interaction at the level of the whole story and at the level of story elements. Four types of understanding and their associated cognitive tools were used in EGR 340 and their application is described in this paper. They include: • Mythic understanding using a fantasy narrative that played on the idea that geotechnical engineers refer to their field as the “dark arts of engineering.” • Romantic understanding using heroic narratives that helped students put themselves in the place of Terzaghi and Casagrande as they developed the field. Extremes of reality was another Romantic tool used throughout the course. For example, students learned about soil stress by first solving the mystery of how quicksand works. • Theoretic understanding using concept maps and narrative was used at both the course and unit level to organize concepts. • Ironic understanding using discussion of the inadequacies of theoretic understanding to recognize the reference to “dark arts.” Transmedia storytelling through extensive use of short video clips and other means was used to enhance the application of these tools. For example, students traveled virtually to Venice where they joined a noisy gondola tour to examine building foundations and learn about how poor water policies impacted the sinking of the city. Course evaluation and lesson assessment data were collected in 2018, 2020, and 2022, with each year being associated with a different version of the course. Using these data, we present a mixed-methods analysis of learning outcomes that provides evidence for the effectiveness of this approach at different steps along the way. Non-parametric comparisons of student assessment data demonstrated that student conceptual learning was relatively stable across measures and versions, but that students in the fully transmedia iteration generally performed more strongly on assessments of project-based learning (Borrow/Fill; Atterberg; Dam). Thematic analysis of student responses to open-ended course evaluation prompts demonstrates that engagement was high across all versions of the course, and that students in the 2022 version discussed engineering topics in a manner that included personal connections and reflections. 

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