. Rather we would like to examine a subsetof threshold concepts and illustrate, first, that they can form a design basis for development ofInteractive Virtual Laboratories where students can actively experience multiple representations,and, second, that experience with these virtual laboratories helps students learn.The following specific project objectives have been constructed to achieve this goal: 1. Validate a set of at least six proposed threshold concepts in thermodynamics. 2. Develop Interactive Virtual Laboratories to provide students multiple representations and help them experientially explore these threshold concepts. Develop the virtual laboratories based on engineering education best practices and multimedia
campus laboratories and those participating in distance education.Using a DC motor allows the instructor to assign experiments using a proportional-integral-derivative (PID) to control the motor’s position. 1 Additionally, a DC motor setup can be expandedto create more complex setups like the inverted pendulum. 2 Inverted pendulum experiments canillustrate different types of systems and different types of control methods. These methodsinclude bang-bang control, fuzzy logic control, neural network control, PID adaptive control,robust control, hybrid control, predictive control, and feed-forward control. 3 Because of thisversatility, both the DC Motor and inverted pendulum systems will be used as the basis for the kitbeing developed
course is shown in Figure 1. It is useful to note that this board was designed by one of the authors and is locally manufactured. Students were expected to design a compatible board of this relative complexity. A further requirement was that this board should be of a scope that an
/FacultyandStaff/Pages/NebojsaIJaksicPhDPE.aspxAbstractWhile inexpensive 3D printers are allowing designers to quickly see their work without enlistingexpensive machine shop personnel and without experiencing long turn-around times, they havelimitations such as small build volumes, warping of thin objects, relatively low-precision, etc.This work demonstrates a new device, a 3D pen, which can be used for (1) repairing 3D-printedparts by adding material, (2) for “welding” the ABS or PLA plastic parts together, (3) forpersonalizing and decorating 3D printed objects, or (4) for creating free-hand 3D plastic objects.For each one of these processes, an appropriate example with instructions is provided. Duringthe demonstration, three 3D pens from three different
calibration, static and dynamic signals, computer-controlled data acquisition,data analysis, documentation, and technical writing. All those topics are important andapplicable in the two-semester Capstone course in senior design project that the students arerequired to take, not to mention any future projects they may work on as professional engineers.As such, it is recommended that junior-level students take the Measurements andInstrumentation course before the Capstone project. In practice, however, a number of studentstake them concurrently.The Measurements and Instrumentation course is offered only in the spring semester, and is a 3-unit course consisting of two 1-hour lectures and one 3-hour lab session per week. The pre-requisites are 1
(nanoelectromechanical systems – NEMS), and smart materials (piezoelectric materials, shapememory alloys, and electrorheological fluids). In the biomaterials block of instruction, a newlaboratory exercise was devised and incorporated to provide the students exposure tocontemporary methods in measuring mechanical properties of biological tissue. Thus, thisexercise tasked the students to measure the elastic modulus of a cow femur using ultrasoundtechnology. The primary learning objectives of this laboratory exercise were (1) to determine theelastic constants of a biologic composite material using an ultrasonic method. (2) To gain anappreciation for why natural materials are nearly always composite, and (3) to discuss howmedical devices may influence the
surface tension. Many of us have observed this property by looking at themeniscus that forms at the liquid vapor interface when a liquid is poured into a container. γlv γsv θ γslFigure 1: A partial free body diagram of interfacial surface tensions acting on a droplet on a surface.The form of the droplet on the surface is the result of three forces that act on the water(Figure 1). When we balance the forces in the x-direction, we obtain the equationrelating the three forces. Page 12.311.2 γ sv = γ sl + γ lv cos(θ
design is depicted in Fig. 1. This configurationallows for a variety of circuit design assignments which integrate “analog” and “digital” signalsas well as sensors, actuators and transducers. In this depiction, the central “intelligent”component is the CPLD, which decides on actions to take based on the information sensed by thesensor-to-voltage transducers such as temperature, pressure etc… sensors. The signals providedby the transducers are digitized by the ADC and fed to the CPLD for processing. In addition,digital signals can be sensed directly by the CPLD through its input output (I/O) bus lines.Various actuators can also be controlled by digital control of a DAC
fashion such that it will facilitate its expansion beyond the boundaries ofthe original institution. A mechanical vibration setup is used to illustrate the system capabilities.1. IntroductionReal experiments are indispensable in engineering and science education for developing skillsfor dealing with physical processes and instrumentation. The traditional way of conductingeducational experiment is to go to a laboratory facility, where the experimental setups arelocated. There, the students typically work in groups (or sometimes individually) at a particularlaboratory exercise and may receive tutorial help from instructors present at the site.1 During thelast decade or so, Stevens Institute of Technology (SIT)2,3,4 as well as many other colleges
loweroutside pressure (such as atmosphere) through a small opening. The goal of this experiment is topredict either the time required to discharge the tank, or the pressure inside the tank, after aspecified time. The exercise is useful to students because it is a rather straightforwardapplication of conservation of mass, and introduces the concepts of choked and subsonic flows.Further, the solution integrates aspects of thermodynamics and heat transfer, making for anexcellent capstone experiment in thermal sciences. The most comprehensive solution to the problem is presented by Bober et al.1 Theyapplied conservation of energy to a discharging tank of air to predict the temperature andpressure inside the tank as a function of time. They analyzed
project focused on characterizingthe fire on the 96th floor of WTC1 (North Tower) and evaluating the contribution of the fire tothe structural collapse. Students contacted vendors and suppliers for the World Trade Center toget information regarding construction details and fire properties of building materials andfurnishings. Students also obtained information reported from the National Institute of Standardsand Technology Building and Fire Research Laboratory investigation of the World Trade Centercollapse. A 1/20th scale model of the original structure (including damage effects from theaircraft and liquid fuel dispersed from the aircraft impact) was designed, constructed, andinstrumented over ten weeks corresponding to the last half of the
and hence also mechanical energy losses in the stream tube comprising the windtunnel region. This readily shows that the major source of these losses is associated with thediverging section, in obvious contrast to the converging inlet section. Identification of theselosses represents an important component to be considered in the design of the wind tunnel itself,as they are directly related to the power requirements to drive the flow. Introducing students tothe strengths as well as the limitations of analytical tools such as Beronoulli’s equation, isextremely important to a meaningful experience in both aerodynamics and fluid mechanicslaboratory settings.Wind Tunnel FacilityFigure 1 shows the existing Educational Wind Tunnel associated with
. Combustion of the fuel sample results in a temperature rise of thebucket containing a measured amount of water in which the Oxygen Bomb is completelysubmerged. The energy balance relation is expressed by the following equation2,3: mf Hg = W ( T) – e1 – e2 – e3 (1) Page 12.1148.2where mf = weight of the fuel sample, W = water equivalent of the calorimeter, e1 = correctionfor heat of formation of nitric acid (HNO3), e2 = correction for heat of formation of sulfuric acid(H2SO4) and e3 = correction for heat of combustion of fuse wire. Heat of combustion, Hg, isdetermined from Equation-1.The
the undergraduate level in the U.S. does not receive enoughattention, as was pointed out at the NSF-sponsored workshop on “New Directions in ControlEngineering” at the University of Illinois [1]. To improve the introductory undergraduatecourses in control, there was consensus [2] to include computer control and simulation, hands-onexperiments, and design problems.The control system laboratory is designed with emphasis on mechatronics systems that is part ofthe “Introduction to Control Systems” course offered for both Electrical and ComputerEngineering, and Mechanical Engineering students. The three credit hour course (2 creditlecture, 1 credit laboratory), “Introduction to Control Systems” (ECE 384 and ME 485),currently exists in the
simulations to predictsystem behavior, and then conduct experiments to verify these predictions. The last stage ofdevelopment in the upgrading of this course and laboratory has focused on a meaningfulintegration of the microprocessor and its use in electromechanical systems. This paper describesthree AC induction motor laboratory exercises, including the objectives and the requiredhardware and software needed. Exercise 1 follows more traditional exercises concerning thecircuit modeling of a 3-hp 3-phase induction motor but with added emphasis in establishing keymotor parameters useful in the design of a V/Hz motor drive. Exercise 2 builds on this modeland allows students to design/establish key gain parameters for an in-house open-loop V/Hzmotor
applications for monitoring and control. Using thissystem, one can quickly use an experimental setup for an application problem, view andprogram the robots, and control robotic and mechanical motions remotely through theWorld Wide Web. The use of modern sensors and data acquisition instrumentation formonitoring and control of such an application is also beneficial as laboratory practices forundergraduate classes on Web-based gauging, measurement, inspection, diagnosticsystem, and quality control.1. Introduction The use of Internet-based technologies by industry has grown enormously inrecent years1-5. Practically all modern manufacturing organizations use the World WideWeb in one form or another: to design and test product ideas, control
13.710.5understanding of the hydrostatic equation. In particular, the experiment confronts themisconception that in a stationary fluid the pressure at a given depth is determined by the weightof the water above that depth. The measurements and the apparatus are very simple. It is possiblefor students to complete the exercise with only a basic knowledge of physics and without anyprior exposure to fluid mechanics. Figure 1 shows the apparatus for the tank-filling experiment. Two cylindrical tanks made ofacrylic are placed side-by-side on the workbench. One tank has a uniform diameter and the otherhas a step change in diameter. Both tanks have a pressure transducer (Omega PX181B-001G5V)on the side at a distance H from the base. The pressure transducer output
associated with the first example will be used to develop a model of the reactionkinetics of nicotinic acetylcholine receptors at the postsynaptic membrane of the neuromuscularjunction.A. Ligand-Receptor Interaction Figure 1 is a diagram of a simple ligand-receptor interaction where the rate constants kf (M-1 -1 s ) and kr (s-1) model the reaction associated with the ligand binding to the receptor and thereverse dissociation reaction respectively. The associated equilibrium reaction and the concomitant reaction rate equation are shown in(1) where R is the number of unoccupied receptors per cell, L is the free ligand concentration(M/dm3) and C is the number of bound receptor ligand complexes per cell
certainly not without itschallenges. While it is a common practice at many Universities to require engineeringstudents to take courses in the liberal arts, the opposite is often not the situation. AtUSMA, however, all graduates receive a Bachelor of Science degree regardless of theiracademic major. With this in mind, students who choose to major in the liberal arts arerequired to take, at a minimum, a three-course engineering ‘core’ sequence from one ofthe Academy’s eight engineering programs in order to graduate. Table 1 shows the three-course core sequence for the Mechanical Engineering Department: Table 1. Mechanical Engineering Three-Course Core Sequence Course Content
year.IntroductionLecture-based training is known to address only certain learning styles. The use of designprojects provides the students with a broader context to the material learned in class. Withproject-based learning students shift from a passive to an active learning pattern that is likely toimprove knowledge retention as well as the ability to integrate material from different courses[1]Like many undergraduate engineering schools in the nation, our university emphasizes a hands-on approach in engineering education. From the beginning of the freshman year to the senioryear, students participate in different levels of engineering projects, from LEGO Mindstormsdesigns, to conducting a research project. Each project provides the students with the opportunity
and safety concerns of using Class 4 lasers prevent this technology being used in the undergraduate and graduate laboratory teaching. Recently, however, a relatively inexpensive, and safe for classroom use ‘educational Particle Image Velocimetry’ (ePIV) system with web based interactive software was developed. This novel technology is an instrument that can be used in diverse educational settings because of its effectiveness as an education tool, high-tech appeal, compact size, low cost and safety. In this paper we introduce ePIV, describe its components in detail and provide examples of how it can be used to enhance undergraduate and graduate laboratory experience.1. IntroductionCreativity is essential in generating scientific
-learning classroom. Both courses have highly successfultraditional versions (20 and 5 offerings, respectively) which serve as reference controls. Whilesome identified problems may eventually be overcome by improved delivery technology, thereremain fundamental differences between our physical and virtual classrooms that, based onobservations of student performance and feedback, may require significant how-to-use-the-interface training and familiarity before attempting to deliver any formal curriculum content. Forsome students, the effort required in learning to use the virtual classroom and transcend itslimitations significantly reduces their participation and performance.1. IntroductionVarious institutions are moving to put entire technical
Instruments (IVI) standard, these programs can be used withdifferent lab equipment with very little software change.The distinctive features of our lab projects include: (1) Combination of front-panel operation of instruments, which helps the student develop intuition, with the use of Virtual Instruments, which saves in-lab time; (2) A shift of the paradigm of learning in the lab from obtaining a few data points to comparison of several data plots and relating them to theory; (3) Requirement that each student prints out experimental plots before leaving the lab, which helps to authenticate the data and organize the lab reports.In this report, the Virtual Instruments are described along with a discussion of their
AC 2008-1600: A WRITING-INTENSIVE FLUID MECHANICS LABORATORYPhilip Parker, University of Wisconsin-Platteville Page 13.134.1© American Society for Engineering Education, 2008A Writing-Intensive Fluid Mechanics Laboratory Philip J. Parker University of Wisconsin-Platteville Page 13.134.2BackgroundCE330, Fluid Mechanics, is required of all Civil and Environmental Engineering students at theUniversity of Wisconsin-Platteville. This four credit class consists of three 1-hour lectures andone 2-hour laboratory each week. Approximately 40 students enroll in the course each semester.When I teach the course, my
paper presents how this teaching approach helpedus cover control theory and design. A project—design of a controller for a coupled-tankapparatus—was used as the hands-on experience for making connections between the theorydiscussed in the lectures and the implementation of the control concepts, such as transferfunctions, performance, and stability of feedback control systems, in the laboratory. During thefive-week project, students were required to: 1) characterize level sensors and variable speedpumps; 2) mathematically model the coupled tanks; 3) design a closed-loop transfer function; 4)design the controller for the system; and 5) implement the controller using LabVIEW. SeveralABET outcomes were successfully supported by this course: the
, Microcontroller Lab, and DSPlab. Through such a plan, all the students will receive enough training on the latest innovativeequipment. Also the undergraduate curriculum of Engineering Technology department atPVAMU will be strengthened by the according lab courses.I. BackgroundFor the past decade, computer and electrical technology has been one of the most fast growingareas in engineering territory. New equipments have come into being, new products haveappeared in the market, and new theories have been applied to the existing devices. All of theabove give new expectations to current engineers and technologies. At the same time, theychallenge our education of modern technologists.1. Industry Demand
undergraduate research on the subject.Keywords: III-V Semiconductors, Concentrator Cells, High-Efficiency, MultijunctionSolar Cell, Gallium Arsenide Based Cells, Lattice-Mismatched, MetamorphicII. Solar Energy Basics a. Solar cell equationsThe basic structure of a solar cell is an illuminated (collection of photons, hv) P-Njunction as depicted in Fig. 1. When the junction is not illuminated, there exists ajunction built-in potential resulting from the formation of a space charge zone at thejunction level as shown in Fig. 2. When the junction is uniformly illuminated by photonswith hv > Eg (energy gap of the junction material), electron-hole pairs (EHP) will begenerated at a rate gop (in EHP/ cm3.s) and will participate in the diode
engine, collect and analyze the output data and relate the resultto the theory learned in the thermodynamics courses. The broader educational objectivesare to improve the students’ understanding of thermodynamics, to help them integratethis knowledge with other subjects, and to give them a better basic understanding of howa jet engine works. Page 13.662.2EquipmentThe gas turbine experiment was conducted using the SR-30 turbojet engine manufacturedby “The Turbine Technologies, LTD”; a cut-away view of the SR-30 model gas turbineengine is shown in Figure 1. and its major engine components are shown in Figure 2.The SR-30 turbo jet engine is comprised of