plane of Fig. 7c is chosen tobe the top, though the front or right plane could the used. The top plane is the default inAutoCAD 3D space, so no switching of view direction is necessary. Fig. 7d shows the sketch ofthe profile for Fig. 7b on the front plane while Fig. 7e shows the sketch of the profile for Fig. 7con the top plane. This completes the planning phase for Example 1. a) b) c) d) Fig. 8: Example 1 segments a) b) c
fig. 5. a b Figure 4. Obscure patterns Page 13.1202.5 Figure 5. Student designs that use patterns2.3. Exploit SymmetryIf the part is symmetric, only a part of the whole component needs to be constructed. Then, itcan be mirrored to obtain the final part geometry. This approach reduces the dimensioningrequirements, and provides greater flexibility. An architectural triangular ruler (see fig. 6) modelcan be simplified by recognizing and exploiting symmetry. The modeling sequence for the ruleris shown in fig. 7
existing, assigned, paper-basedengineering graphics problems. Students solve paper based problems while being able to see and“touch” the model with the MR application that is compiled for the Moverio see-through glasses.The Mobile App projects the model in front of the students’ eyes, allowing them to see the threedimensional (3D) representation of the objects in the problems right in front of them. This is asimilar experience to giving a real model of the problem to their hands which is not always possiblein large classes. Moverio has a mobile touchpad unit that is used to control the model and movethe user in a game-alike application. (A) (B) Figure 4 (A) Moverio
in various forms. a. Classroom – Basics of orthographic projection b. Classroom – Creating 3-D foam models of parts c. AutoCAD to solve orthographic projection problems d. Classroom – Basics of isometric drawings e. Classroom – Basics of auxiliary views f. Classroom – Basics of sectional views g. AutoCAD and Inventor to create auxiliary views h. Inventor to create sectional views i. Classroom – Exercises in descriptive geometry II. Learning software. a. AutoCAD basics, then introducing new commands as needed each class session b. Learning by practice – using AutoCAD to solve visualization problems and create drawings c. Inventor basics, then introducing new
6, surfaces A and B were created before C. Note that both A and Btouch patch C at its C’s edges labeled 1 and 2. Note, when A and B were built the continuity onthese shared edges was set to Free. To build patch C, the surface edges of A and B were selectedand NURBS curves selected at edges 3 and 4. Selecting surface edges enables the surface tool tobase it’s continuity off a 3D surface, in this case patches A and B. To set the desired continuityfor patch C, the square surface edit box was opened. C’s edges 1 and 2 were set to curvature,edges 3 and 4 were set to free. This freedom enables the surface tool to position the patch C’ssurface cv’s and achieve surface curvature continuity at edges 1 and 2. The results are zebrastripes that
BFigure 1 A: Exploded view of the roller guide, B: 3-D view of the roller guide Page 23.762.3 A BFigure 2 A: Exploded view of the tool post, B:3-D view of the tool postThe end of course evaluation found that, students could follow the directions and accomplish theindividual project on time. However, they felt a guided project lacked challenge, and that theywould like to design a more complex model by themselves. According to the Bloom’s taxonomy,a guided individual project is considered as an application which can be used to test studentproblem solving ability as well as
leading the development and implementation of solid modeling conceptsin the CAD industry.Two institutions with different approaches in their graphics offerings are, institution A (Universityof Wisconsin - Waukesha) there is now a hybrid semester course where half of the course usesAutodesk’s AutoCAD, and the other half of the semester is done utilizing Autodesk’s Inventor.The other institution is B (Western Michigan University) which offers a semester course based oninstruction utilizing solid modeling packages, first Siemens’ NX and then Dessault Systemes’CATIA. The offerings at both institutions are for students that have already decided on engineeringor engineering technology programs, and both institutions are in a semester schedule. These
therectangular block teaching aid is used. The profile of a surface tolerance is given a value of 10mm, and is applied with respect to datum -A-, datum -B-, and datum -C-. The rapid-prototypedblock is then fixtured to the inspection table using the appropriate datum references specified inthe drawing, as seen in Figure 6b. Page 22.1017.8Figure 6a: Rectangular block with a 10 mm profile of a surface tolerance applied.Figure 6b: Block 1 fully fixture to the measurement table.A part file containing the perfect block is opened in Inventor, which is modeled in the sameconfiguration as that of the imperfect block on the inspection table. The CMM is then
). Linn and Petersen2008 ASEE Annual Conference, Pittsburgh, PA, June 22-25, 2008categorize spatial ability into three categories: (a) spatial perception, which can be done efficiently using a gravitationalor kinesthetic process; (b) mental rotation, which can be done efficiently using a Gestalt-like mental rotation processanalogous to physical rotation of the stimuli; (c) spatial visualization, which can be done efficiently using an analyticprocess. In spatial perception tasks, subjects are required to determine spatial relationships with respect to theorientation of their own bodies, in spite of distracting information. The example of such test is a Rod and Frame Test(RFT), in which subjects must place a rod vertically while viewing a frame
challenge with remote learning is ensuring all students have equitable access tothe Internet. The Spatial Vis app can work in offline mode if access to the Internet is a problem.Essentially, grading of assignments can occur locally and progress in the app is saved until theapp can connect with the internet and sync student progress with eGrove Education’s servers.3. Evaluation MethodsThis evaluation takes place in two college engineering CAD courses in San Diego, CA. The firstcourse denoted as Class A (CIVE 121 Computer Graphics for the Built Environment) was taughtat San Diego State University. It was on a semester system and was approximately 5-6 weeksinto the semester when the pandemic hit. The other course denoted as Class B (SE 3
Missing features 10 25 B Misrepresented feature * Questions #8 and #10 share the same exemplary object and its rotations.Question #14 of the PSVT-R test 5 is also the question #17 in the original PSVT test 4, andincluded in question E of Figure 5.169 of a popular textbook 33. Since question #14 of thePSVT-R test is readily available, it has been chosen as an example to show some details of theerrors. In the original PSVT-R test, the rotated views A and E both missed some features on therear end of the object as placed (Figure 1). Figure 3 shows the corrected views A and E with themissing features visible as they should be
. Zoltowski, and W. C. Oakes, “Collaborating Interaction Design in Engineering Projects in Page 24.519.11[2] Community Service(EPICS),” in Soaring to New Heights in Engineering Education, Seattle, WA, 2012, pp. 1141–1146.[3] J. Scholtz, M. A. Whiting, C. Plaisant, and G. Grinstein, “A reflection on seven years of the VAST challenge,” in Proceedings of the 2012 BELIV Workshop: Beyond Time and Errors-Novel Evaluation Methods for Visualization, 2012, p. 13.[4] M. Whiting, K. A. Cook, C. L. Paul, G. Grinstein, B. Nebesh, K. Liggett, M. Cooper, and J. Fallon, “VAST Challenge 2013: Situation Awareness and
with a cover that was created Page 15.254.5by students during an instructor led exercise. Modify Part B Skeleton Part A Assembly Updates with RegenerationFigure 3. Part and Assembly Modeling Using a Skeleton Sketch Skeleton Mechanism Figure 4. Motion Skeleton for a Carjack Page 15.254.6Figure 4 shows an example of a motion skeleton used in an exercise
academia andindustry in a variety of topics related to the CADD industry. Figure 2 shows the number ofparticipants with regard to their profession. Figure 2 – The participants in our survey from both academia and industry2.1. Participants from Academia (Faculty)We surveyed the type of program in which our academic participants teach or conduct research.In addition, we asked whether or not our academic participants have ever taught engineeringgraphics in 2D or 3D. As demonstrated in Figure 3 (a,b,c), more than 55% of our academicparticipants teach in the Engineering Technology program, 20% in Engineering, and the rest inIndustrial Technology, Applied Engineering, Technology Education, and others. Out of this
Participant D Participant A Participant B Figure 3 – Selection of Pre Instruction drawingsPerception Proof ExerciseThis was devised to encourage the recognition of outline edges of irregulargeometries. The drawing was inverted in order to reduce the chance of participantsrelating the shapes to symbols. A selection of participant drawings is shown in figure2.Findings 1. All participants expressed a feeling of being “very pleased” with their drawing 2. They stated that their focus was on proportionality and drawing the picture in parts rather than as a whole. 3. Turning a drawing upside down and dividing it into a number of parts made
Spatial Visualization Training,” ICERI2017 Proceedings, pp. 5373– 5381, October 2017.[10] N. Delson, and L. Van Den Einde, “Sketching, Assessment, and Persistence in Spatial Visualization Training on a Touchscreen”, 124 ASEE Annual Conference & Exposition th proceedings, Columbus, OH, 2017.[11] E. Hilton, M. Paige, B. Williford, W. Li, T. Hammond, and J. Linsey, “Engineering Drawing for the Next Generation: Students Gaining Additional Skills in the Same Timeframe," in Proceedings for the 124th ASEE Annual Conference & Exposition. Columbus, OH, 2017.[12] J.E. Bell, et al. "Board# 32: Work in Progress: A Study of Augmented Reality for the Development of Spatial
attributes are key fordistancing the render from the overly perfect quality of a computer-produced 3D render.(a) (c) (e) (b) (d) Figure 2In Figure 2 you can see examples of the Toon outlines: (a) a simple contour, (b) wireframe lines,(c) contour with textured thickness, (d) thick contour with textured thickness and opacity, and (e)multiple outlines on each object (you can add as many as you want).The second tool is the Paint Effects brushes. The Toon Outlines and the Paint Effects strokescan also be used in conjunction with each other. For instance, the Toon Outline tool can be usedto specify how exactly the
of an actual project with a timeline and budget. Students learned what an individual’stime is worth, what mistakes can cost, and how to deal with a client, and appreciate the value ofdeadlines.Bibliography1. Kolb, A. and Kolb D. A. (2001) Experiential Learning Theory Bibliography 1971-2001, Boston, Ma.: McBer and Co, http://trgmcber.haygroup.com/Products/learning/bibliography.htm2. Kolb D. A. (2005) David A.Kkolb onEexperientialLlearning, Downloaded December 18, 2006, http://www.infed.org/biblio/b-explrn.htm3. Jolliffe, Lee B. Industry’s Team Approach to Classroom Projects, Journalism Educator (Summer 1991).4. Stout, Renee J., Salas, Eduardo, and Fowlkes, Jennifer E. 1997 Enhancing Teamwork in Complex Environments Through
Creo demo completed example (A) (B) (C) (D) Figure 2 – Lecture Creo demo step-by-step example• Prior to the lecture, a Precision LMS unit had been assigned that addressed concepts, theory, and step by step practical examples on the creation of revolved features and patterns in Creo, and it was to be completed outside of class before lecture. The tutorials include videos and step-by-step instructions with detailed explanations as shown in Figures 3 and 4. Figure 3 – Precision LMS lesson on creating revolved features [5] Figure 4 – Precision LMS lesson on creating
with a selection of web-based infographictemplates and 50 minutes of class time in which they brainstormed and developed theirinfographics. They worked in groups of 4-6 students each, with supervision and assistance fromtheir instructor and one undergraduate TA. Preliminary analysis of student submittedinfographics from fall 2015 showed that students interpreted the assignment and the purpose oftheir infographics in a wide variety of ways. Most students relied heavily on limited, pre-madetemplates for generating their infographics, worked with only minimal guidance and a verysimple rubric provided by instructors (see Appendix B), and may have seen this project as a veryminor segment of their overall final project. Student groups did create
. E., Nazarian, D. G. (2002). Influence of the Internet in an Orthopedic Practice: Survey of 500 Patients. The University of Pennsylvania Orthopedic Journal, 15, 61-65. Page 14.658.9 Appendix A Survey QuestionsThis survey is for the use only of Ortho Solution, LLC. Your answers will be collected anonymously and will not be given toanyone else. 1. Age: a. 30-39 b. 40-49 c. 50-59 d. 60-69 e. 70 and above 2. Have you ever had a joint replacement surgery before
Modeling? Direct modeling is an intuitive approach to creating geometry without the burden ofhistory-based dependencies. History-based (procedural) parameterization of modelsrequires the user to thoughtfully consider the important model input/output parameters;independent dimensions are identified and defined by the user during model creation whiledependent dimensions are calculated based on procedure (history tree rebuild). However,instead of storing the sequence of feature creation, a direct model is based on the boundaryrepresentation (b-rep) of the solid. The model is regenerated based on a set of geometricconstraint equations rather than the sequential reconstruction of feature history. This is asimple but powerful method of specifying
students’ ability to create solid models when givenan assembly drawing and their spatial visualization ability. Students were administered thePSVT:R and the MCT and were then given an assembly drawing and asked to model as many ofthe seven parts as possible during a 110 minute class period. The parts in the assembly ranged incomplexity from a ball to a valve body. Students were given a ruler to measure parts on the B-size drawing and determine sizes of features based on the given scale (2:1). Relationships wereexamined between the PSVT:R, MCT, modeling activity, final project and the final exam. Thispaper will present the results of this study and discuss implications for future research.IntroductionWith the reduced amount of instructional time
car body structure and engine layout (see Figure 1-b). 9 They are also incorporating thistechnology into their assembly lines to improve their manufacturing and assembly processes.Volkswagen uses AR for comparing calculated and actual crash test imagery, analyze interferingedges, plan production lines and workshops, compare variance of the vehicle parts and verifypart dimensions. AR can augment the effectiveness of navigation devices. Information can bedisplayed on a car’s windshield indicating information of where the user is going. In militarytraining, AR can be employed as a third eye for a soldier to help him to figure out if there issomeone on his back. In addition, with the usage of AR, a soldier does not have to stop to look ata map
. Wing, “Research notebook: Computational thinking—What and why,” link Mag., vol. 6, 2011.[7] National Science Teaching Association, “About the Next Generation Science Standards.” https://ngss.nsta.org/About.aspx (accessed Sep. 10, 2020).[8] Common Core State Standards Initiative, “Standards in Your State.” http://www.corestandards.org/standards-in-your-state/ (accessed Sep. 10, 2020).[9] E. R. Banilower, P. S. Smith, K. A. Malzahn, C. L. Plumley, E. M. Gordon, and M. L. Hayes, “Report of the 2018 NSSME+,” no. December, p. 442, 2018, [Online]. Available: http://www.horizon-research.com/report-of-the-2018-nssme.[10] L. J. Ausburn and F. B. Ausburn, “Desktop virtual reality: A powerful new technology for
and the tri-part modeling process begin.Phase I: NURBS NURBS: Non Uniform Rationale B-SplineNURBS CurvesThe NURBS phase begins by creating NURBS curvesthat match the profile curves of the concept car. Inimage 0, the profile curves are shown in bold in theTop, Front, and Side orthographic multi-views. By firstpositioning edit points and then manipulating controlvertices any three dimensional curve can be created.Derived from ship-building practices, NURBS curves, like curved “wood” splines, are formed byusing hulls or “ropes” tied to a curve at edit points (ep) or “knots” that pull with control vertices(cv) or “weights” that bend the curve. Knots or edit points are attached directly to the curve’s
list. A survey was then conducted at the end of Fall 2015 semester.MethodologyData SourceEnd of Course Survey: The end of course survey consists of 42 to 55 items. It wasadministered to students in all sections near the end of the Fall, 2015 semester. Thesurvey covered various components of the course. A subset of these survey items (13items) focused on assessing student patterns of use and perceptions of the variousideation methods introduced by the instructor. These ideation method survey itemsincluded a) a checklist grid in which students were asked to indicate whether they usedeach ideation method on each of three course projects, b) Likert-type items onperceptions of the ideation methods, and c) open-ended items on the ideation
Figure 2 serves to reinforce the topics of 3D orientation, extrusion symmetry, draft angles, andsketch constraints. This is a typical assignment in the third week. Figure 2: Example Sketch & Extrude AssignmentThe following in-classroom cases are witnessed: • Student A believes he/she has met all five grading criteria prior to class start or during class time. An available evaluator evaluates the work and finds no mistakes. Student A may exit the class. This is the quickest case, and the evaluation process ranges from 30 – 180 seconds per assignment. • Student B believes he/she has met all five grading criteria prior to class start or during class time. An evaluator is not free, as all are
results on sustainabilitysystems-thinking skills will be presented. The sustainability interventions in the courseinclude (i) just-in-time lectures to introduce sustainability concepts (ii) technology-in-social contexts activities intended to help students understand how social context caninfluence the success or failure of an engineering design and (iii) contextualized studentprojects, which include (a) individual projects that address wasteful human behavior andenvironmental sustainability in product designs and (b) team projects that address social,environmental and economic sustainability aspects in designing large engineeringstructures.The assessment plan includes an investigation of students’ a) perceptions of thesustainability-related
. Twenty-seven (17%) indicated they wouldbe interested in this to diverse their future employment options.Table 1 Age Class Race Anticipated Preferred Grade Learning Style 17 or less Freshman Caucasian A Auditory 0/0% 4/2% 142/88% 82/51% 6/4% 18-19 Sophomore African-Am. B Visual 87/54% 109/68% 9/7% 72/45% 94/58% 20-21 Junior Asian C