Engineering Design Graphic Journal (ASEE - American Society for Engineering Education)
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Integrating Computer-generated Stereoscopic Models Into An Introductory Design Course
Get PDFStereoscopic technology has been successfully used in several learning and education environments. However, uses for and the effectiveness of computer-generated stereo models in design and graphics education still have not been extensively explored, especially in a large classroom setting. This pilot study examines the applications and potential of computer-generated stereo models in design and graphics courses in a large classroom setting. Computer-generated stereo models were displayed and manipulated in the classroom to help students acquire 3-D concepts. A survey was developed to both quantitatively and qualitatively measure student perceptions with and without using the stereoscopic systems. The study survey shows that the effectiveness of integrating computer-generated stereo models in design courses is not only affected by model image quality, but also by physical reactions to stereoscopy (e.g., some students felt dizzy or could not visualize stereoscopic views). Since model image quality is greatly influenced by the stereoscopic system used, further study is needed for determining the most cost-effective stereoscopic system for general design and graphics classroom use. In addition, pedagogical factors for best use the models to promote learning also need to be investigated.
Teaching Integrated Design and Manufacturing, Course Structure and Assessment
Get PDFUntil recently, most engineering and engineering technology programs taught coursework piecemeal – one subject at a time with little integration between subjects. The failure of this system is well documented and has led to outcomes assessment and the now familiar ABET a-k criterion. Faculty at Purdue University Calumet (PUC) recognized the shortcoming of the original system and applied for an NSF ILI-IP grant which was awarded in late 1997 and continued through mid 2000. The grant resulted in significant changes in the engineering course ME461, Machine Design and the creation of the technology course MET461, Computer Integrated Design & Manufacturing. With two years of experience available, this paper discusses the structure, pedagogy, and assessment techniques for the latter course, which concentrates on 3D parametric modeling, graphical finite element analysis, and manufacturing using ProE/ProMechanica/ProManufacture in its integrated environment. Some observations that faculty new in this area may find helpful complete the paper
Haptic Abilities of Freshman Engineers as Measured by the Haptic Visual Discrimination Test
Get PDFThe Haptic Visual Discrimination Test (HVDT) is a standardized and quantitative test that requires skills in tactile sensitivity, spatial synthesis and the ability to integrate partial information about an object into a whole. In this test, the subject manipulates an object in one hand without seeing it, and then selects a corresponding object on an identification chart with their free hand. The test was developed of a period of eight years and tested on both normal and disability subjects, with test-retest reliability of the HVDT between .91 and .93. The HVDT was administered to a large sample of engineering students and the mean of the resulting scores was one standard deviation above the mean of the normal population. The high instance of haptic ability in these students, who also showed high visualization ability, suggests a potential need for haptic and tactile related instruction in addition to lectures and computer-based or virtual formats
Message from the Editor
No full textDear Members: The three articles in this issue reflect themes common to the Engineering Design Graphics Journal: a selection of graphics technology, techniques for the use of this technology, and issues with the integration of technology into the classroom. While graphics technology has been part and parcel of this Division since its inception, the challenges of effective use and integration have not abated. The first article by Smith takes a look at the last theme: the integration of technology into the classroom. While stereoscopic viewing technology has been with us since the Victorian era, evolving technology has allowed instructors to set up low cost, full-color, dynamic viewing systems in their classrooms. As is often the case, the march of technology has preceded the research on its effectiveness in the classroom. Smith looks at a number of important pedagogical and integration issues, including psychophysical issues of discomfort from using the viewing apparatus. The second article by Birchman and Flaherty provide an excellent example of how research and practice can come together. The article discusses the ways animation tools such as Flash can be used to support instruction. In addition to providing examples of practice, they also provide a research basis for their instructional effectiveness. Finally, Okudan picks up on a well-established line of research looking at how to select a solid modeling software package. The article uses both past and current research to help refine a set of protocols that can be used by members of this Division in their quest to acquire the best possible instructional tools for their classrooms. Please review the candidate slate printed in this Journal issue and vote when you receive your ballot in the mail. Strong participation in election process of the Division is an important hallmark of the EDGD. Take a look at the pictures from the mid-year meeting in Williamsburg, VA and see how much fun folks are having. Join us and become part of the fun in Orlando
Concurrent Coplanar and Non-planar Structural Analysis Using 3D CAD
Get PDFThe purpose of this study was to investigate the effectiveness of 3D CAD in dealing with the concurrent coplanar and non-coplanar structural analysis. Several problems were solved using both 3D CAD and traditional approaches. The traditional approach in descriptive geometry requires manual construction of vector polygons. The 3D CAD approach, which utilizes the same geometric and spatial reasoning, requires constrained wireframes and extruded solids as the tools for analysis. The comparison of these two different approaches was made. It proved that 3D CAD approach did demonstrate (1) the high performance in speed and accuracy and (2) the effectiveness in examining the design alternatives
Using CADKEY to Solve Intersections of Thin-Walled Surface Models
No full textFundamental construction in descriptive geometry deal with determining the intersection of various elementary solids, such as planes, cylinders, and cones. Systems involving planes, cylinders, and cones are generally produced from sheet metal or other thin materials. When panels of these thin materials are fastened together, complex objects result. Determining the lines of intersection between the basic shapes that create the final product by using manual methods has always been a complex procedure. The process is greatly improved when using computer-aided drafting (or design) (CAD) program such as CADKEY; however, the orthographic results can be misleading. To avoid any problems associated with orthographic views of surface models, software developers should consider integrating within the modeler a means by which the surface model can be display as a solid model, thus eliminating hidden lines that nearly coincide with object lines
Techniques for Creating Animations for Technical Presentation
Get PDFIn the past, animation was used mainly as a medium for entertainment. However, animation has recently evolved into a highly desirable means for the presentation of technical information, especially if the audience members have non-technical backgrounds. In this sense, animation can be used as a bridge for information flow between the technical community, its management, the political community, or even directly to the consumer. The availability of software tools to easily create animations from solids or surface models gives engineers a unique media for the presentation of ideas, as well as a means for expression of creativity. Also, allowing engineers to create their own animations ensures their technical accuracy. This paper will review some techniques that can be used to improve animations for technical presentation
Message from the Editor
No full textDear Members: This issue not only contains a variety of very interesting papers but also a look at the upcoming officer candidates for the Division. As members you will be given the opportunity to vote on these officer positions in the Spring ballot. The following members that have accepted nominations for the open position within the Division for the coming year are Holly Ault and Jerry Vinson for Vice Chair, Tim Sexton and Doug Baxter for Secretary-Treasurer, and Kathryn Holliday-Darr and Eric Wiebe for Director of Publications. In addition, the proposed changes to the EDGD Bylaws are also printed in this issue so everyone will have the opportunity to review the changes before voting on them in the Spring. This past summer at the Annual Meeting the Executive Committee voted to reinstate page charges for papers published in the Journal for EDGD members along with increasing the page charge for non-EDGD members. This charge is necessitated solely to help offset the increasing costs of the Journal. The rates will be 80 per page for non-EDGD members. The rate will be determined by the status of the first author listed on the paper at the time the paper is received by the Editor. Page charges are due upon notification by the Editor and are payable to the Engineering Design Graphics Division. As we begin a new year please support Sheryl Sorby as Chair and the other officers with the planning of events for 2003. Many times it is too easy to forget how much time goes into the success of these activities
CAD Software Industry Trends and Directions
Get PDFThere is an interesting and unique relationship between industry and college level academic engineering and technology programs. This relationship constantly evolving and redefining itself, reflecting both the accelerating level of technological change in industry, as well as the flexible and somewhat fickle focus of the industrial environment. In order to produce graduates who are well prepared for industry and who can be immediately productive in an industrial/technical setting, college and university engineering and technology programs must be knowledgeable regarding the trends affecting industry and incorporate into their curricula the necessary and relevant material to meet those goals. The engineering design graphics field is especially subject to rapid technological change. This is due to fundamental changes in how industry views the design process, and the pace at which computer hardware and software improvements are introduced and incorporated into standard procedures. This paper reviews current trends in the high-end computer aided design software industry, with discussion regarding the direction and focus that CAD industry leaders are taking with their products, and the industry needs that are driving those developments. The impact of these changes and trends on academic programs is addressed. This discussion includes recommendations as to what portion of these developments should be incorporated into the curriculum, and what college and university engineering graphics programs should do to prepare their students for these developments in industry
Future Applications of Geometry and Graphics
Get PDFDefinitions of geometry and graphics are developed based on a panel discussion held at the 8th International Conference on Engineering Computer Graphics and Descriptive Geometry (ICECGDG) held in Austin, Texas (Baker, et al., 1998). These definitions are used as a starting point for discussion of the future applications of geometry and graphics in engineering graphics education. Past, present, and future applications in graphical analysis, descriptive geometry, and engineering documentation are used as examples