Conference Session

Develop Course / Materials / Topics for a Global Engineering Education

Collection

2009 Annual Conference & Exposition

Authors

Alireza Rahrooh, University of Central Florida; Scott Shepard, University of Central Florida; Walter Buchanan, Texas A&M University

Tagged Divisions

International

of the manipulator from measurements of the inputs and outputs (jointpositions, velocities, and accelerations) and calibrates adaptively the model in the controller.II. Problem StatementThe matrix-vector formulation of the closed-form dynamic model for a robot with N joint axes1 Page 14.161.2is: D(q, λ) q&& + h ( q, q& , λ) = F(t) (1)In (1), q(t), q& (t), and q&& (t) are the joint position, velocity and acceleration vectors; λ is thevector of dynamics parameters; D(q, λ) is the inertial matrix; h ( q, q& , λ) is the coupling vectorthat incorporates the

Conference Session

Signal Processing Education

Collection

2009 Annual Conference & Exposition

Authors

Thad Welch, Boise State University; Cameron Wright, University of Wyoming; Michael Morrow, University of Wisconsin, Madison; Travis Kent, Boise State University

Tagged Divisions

Computers in Education

combination with a digital down converter (DDC) based data recorder to capture and record real world radio signals. The resulting in-phase (I) and quadrature (Q) data files are then imported into M ATLAB for processing. This batch processing of real world radio signals allows for a tremendous amount of classroom flexibility in the discussion of software defined radio topics.1 IntroductionThere is a great deal of interest in the DSP algorithms necessary to demodulate communicationssignals. While a number of existing courses cover these topics, the use of real world communi-cations signals to develop and test these algorithms can be problematic. For many universities,the largest challenge in working with real world signals is the

Conference Session

Thermodynamics, Fluids, and Heat Transfer I

Collection

2009 Annual Conference & Exposition

Authors

Andrew Foley, United States Coast Guard Academy; Michael Plumley, United States Coast Guard Academy

Tagged Divisions

Mechanical Engineering

S1 =Entropy out. Ta = Ambient Temperature Figure 1. Simple pipe model for second law consideration. Application of the energy accounting equation as described by Foley [3], gives : Q& 1 / W& − ( m& e ) in / ( m& e ) out − E& gen ? E& CV . (1) Which for a steady flow, no work situation simplifies to : Q&1 ? m& .C p (T1 / T2 ) . (2) This is usually as far as we need to go in most practical problems, and hence any issues of entropy do not arise. However there is much to be learned by considering the entropy

Conference Session

Computers and Software in Teaching Mathemathetics

Collection

2009 Annual Conference & Exposition

Authors

Ali Farahani, National University, San Diego

Tagged Divisions

Mathematics

the product of the twosets. The set union, intersection and difference operations are all available in Python thusenabling one to verify Demorgan’s law for sets.Logic:In logic students typically are requires to generate truth tables for a variety of Booleanexpressions. Python directly supports conjunction and disjunction in terms of the build inprimitives and and or, the negation is done using not. A nested loop can be constructed togenerate the truth table for standard logic operators such as the and for p in (True, False): for q in (True, False): print "%10s %10s %10s" % ( p, q, p and q)Once again the code is highly intuitive and requires minimal coding ability. The print

Conference Session

Pedagogy and Assessment III

Collection

2009 Annual Conference & Exposition

Authors

Peter Osterberg, University of Portland; Aziz Inan, University of Portland

Tagged Divisions

Electrical and Computer

resistive lattice. For example, for an infinite 2D Honeycombresistive lattice (see Fig. 2) where M = 3, the effective resistance between any two adjacent nodesis simply Reff = 2R/3, where R is the value of each resistor on each branch of the lattice.Similarly, M = 6 for an infinite 3D cubic resistive lattice and, therefore, Reff = 2R/6 = R/3. Page 14.300.5 Ia = I (or Qa = Q) a + Va-b Infinite R, L, (or νa-b

Conference Session

Thermodynamics, Fluids, and Heat Transfer II

Collection

2009 Annual Conference & Exposition

Authors

Laura L. Pauley, Pennsylvania State University

Tagged Divisions

Mechanical Engineering

tolengthen the mask and a carriage return before and after to increase the height of the mask.Example 1 also used “explicit,ALL” for several calculations. In this case, the definingequation was used as a mask for the “explicit,ALL” words. Several problems can be seen inthe hf calculation. The numerical value for V was not substituted into the equation. Instead,the previous equation defining V in terms of Q and d was inserted and the numerical valuesfor Q and d displayed. In addition, the Darcy friction value previously calculated is notrounded in the “explicit,ALL” equation. Attempts to resolve these problems were notsuccessful.Solving Equations Analytically. Equations can be solved symbolically (analytically) using[cntl .]. (The two keystrokes in

Conference Session

Mechanical Engineering Poster Session

Collection

2009 Annual Conference & Exposition

Authors

Rogelio Luck, Mississippi State University; B.K. Hodge

Tagged Divisions

Mechanical Engineering

. Page 14.65.10 gal ( Flowrate : Start the flow after 100 min ) Q( t) 2∧ if t ≅ 100min min 0 otherwise Qgen1( T) 6600∧ W if T > KfromF( 130) ∧ K ( Heater ON if the temp. is below 130F ) 0 otherwise Qgen2( T) 4400∧ W if T > KfromF( 130) ∧ K 0 otherwiseUsing an energy balance to solve for the time rate of change (Slopes) of the temperatures :  1 s   τ∧ C ∧ V1∧ τ∧ Cp∧ ∗ Tin / Ta+ ∧ Q( t∧ s

Conference Session

Issues and Opportunities in IE Education

Collection

2009 Annual Conference & Exposition

Authors

J. Eric Bickel, University of Texas, Austin

Tagged Divisions

Industrial Engineering

, T(r | p)  T(p | p) for all r  p andT(r* | p)  T(p | p) when r* = p. [1-4] Many strictly proper scoring rules have been developed.Three of the most popular are given below.Quadratic (Q): Qi (r )  2 ri  r  r  [1,1] (2)Spherical (S): Si (r)  ri / (r  r)1/2  [0,1] (3)Logarithmic (L): L i (r )  ln( ri )  ( ,0] (4)The range of possible scores differs considerably. For example, logarithmic scoring holds thepossibility of an infinitely negative score. While this may seem like a defect, we will argue thatthis feature is a benefit of log scoring. Any linear

Conference Session

Innovations in the CHE Laboratory

Collection

2009 Annual Conference & Exposition

Authors

Adrienne Minerick, Mississippi State University

Tagged Divisions

Chemical Engineering

Tpolycarb (x) = 13320 C m x + 122 o C o LStudents will obtain a different temperature profile for each material they study and canthen use Fourier’s Law to determine the conduction heat transfer rate. dT kq''x = 1k = (Tw,s 1 Tp,s ) dx LBy providing the thermal conductivity, k, or the heat flux, q''x , it is possible to calculatethe other parameter. Alternatively, students could determine heat flux from the steadystate heat generation experiment outlined below. 0.21W mKq''x = (122 o C 1 88.8 o C) = 697 W 2 0.01m mOne Dimensional Conduction Through Composite Systems:Steady state heat conduction

Conference Session

Programming for Engineering Students II

Collection

2009 Annual Conference & Exposition

Authors

ansgar neuenhofer, California State Polytechnic University, San Luis Obispo

Tagged Divisions

Computers in Education

and free combined)dof(fixdof)=1;free = find(dof==0);We reduce the structure force vector F and the structure stiffness matrix K to form the correspon-ding quantities Ffree and KFree , solve the set of linear equations for the vector q free of structure dis-placements and finally add the prescribed zero displacements to the solution vector using thefollowing statements.%initialize displacement vectorq = zeros(dim,1);%reduce stiffness matrix (eliminate rows and columns representing fixed dofs)Kfree = K(free,free);%reduce force vectorFfree = F(free);%solve equationsqfree = Kfree \ Ffree;%include fixed degrees of freedom in displacement vectorq(free) = qfree

Conference Session

Signal Processing Education

Collection

2009 Annual Conference & Exposition

Authors

William Birmingham, Grove City College

Tagged Divisions

Computers in Education

frontend that contains a “down-converter,” which converts the RFsignals at the received frequency into two parts: the I signal (in-phase) and Q (quadrature) signal,which is 90 degrees out of phase (relative to I). To perform down-conversion, we use a Tayloedetector 6 . The detector is a simple, inexpensive circuit that does a complete quadrature down-conversion. The I and Q signals feed directly into the soundcard of the PC, where they areconverted from analog to digital signals using the soundcard’s A/D converter.Once converted by the soundcard, I and Q signals are demodulated. This process consists of thefollowing basic steps for receiving7-10. 1. Time-domain shift: while I and Q are in the time domain, their (center) frequencies are

Conference Session

Thermodynamics, Fluids, and Heat Transfer I

Collection

2009 Annual Conference & Exposition

Authors

Andrew Foley, United States Coast Guard Academy; Michael Plumley, United States Coast Guard Academy

Tagged Divisions

Mechanical Engineering

? ? Cv.TE − p E .v E ? u E − p E .v E (10) mReturning now to our control volume A,DU A ? ∑ Q A / ∑ W A − m I .(u I − p I .v I ) / m E .(u E − p E .v E ) (11)Again it is interesting to note that the convected terms comprise properties that arecompletely defined outside of the control volume A which we are ultimately analyzing.At this point convention is that there is ‘convenience’ to be had by grouping the terms in thebrackets into one term. i.e. the property enthalpy (h) is justified.Hence,DU A ? ∑ Q A / ∑ W A − m I .(hI ) / m E .(hE ) (12) This convenience however comes at a price. First, internal energy is a property that wasclosely related to pressure and temperature and fundamental in our

Conference Session

Software Engineering Teaching Techniques

Collection

2009 Annual Conference & Exposition

Authors

Salamah Salamah, Embry-Riddle Aeronautical University, Daytona Beach; Steve Roach, University of Texas, El Paso; Omar Ochoa, University of Texas, El Paso; Veronica Medina, University of Texas, El Paso; Ann Gates, University of Texas, El Paso

Tagged Divisions

Software Engineering Constituent Committee

highlyexpressive and widely used in formal verification tools such as the model checkers SPIN [8] andNuSMV [2] . LTL is also used in the runtime verification of Java programs [18]. Formulas in LTL are constructed from elementary propositions and the usual Boolean operatorsfor not, and, or, imply (¬, ∧, ∨, →, respectively). In addition, LTL provides the temporal operatorsnext (X), eventually ( ), always (✷), until, (U), weak until (W), and release (R). These formulasassume discrete time, i.e., states s = 0, 1, 2, . . . The meanings of the temporal operators arestraightforward1 • The formula Xp holds at state s if p holds at the next state s + 1, • p U q is true at state s, if there is a state s ≥ s at which q is true and, if s is such a state, then

Conference Session

Interdisciplinary and Multidisciplinary Laboratories

Collection

2009 Annual Conference & Exposition

Authors

Messiha Saad, North Carolina A&T State University

Tagged Divisions

Division Experimentation & Lab-Oriented Studies

Entropy Figure 9. Simple Rankine Cycle T-s DiagramCycle Analysis:The thermodynamics efficiency is defined as: . . W turbine ,out / W pump ,int ϕ th ,Rankine ? . Q inwhere, . . . W turbine ,out ? m(h3 / h4

Conference Session

Preparing Engineers for the Global Workplace & Successful Graduates for a Flat World: What Does It Take?

Collection

2009 Annual Conference & Exposition

Authors

Jared Geddes, Brigham Young University; W. Vincent Wilding, Brigham Young University; Randy Lewis, Brigham Young University

Tagged Divisions

International

the localleaders to determine the needs of the Q. #1 72%people and to obtain technicalinformation required for the project(such as stream locations, water flow Q. #2 81%rates, etc.).Upon arrival, all of the projects were Q. #3 79%implemented; however, many of theprojects had to be adjusted based on the 0% 20% 40% 60% 80% 100%local materials available. Materials which students had been told would beavailable were actually difficult to find. This was probably due to miscommunication betweenthe NGO contact and the engineering students.Most of the interviews conducted showed that

Conference Session

Thermodynamics, Fluids, and Heat Transfer II

Collection

2009 Annual Conference & Exposition

Authors

Michael Maixner, United States Air Force Academy; James Baughn, UC Davis

Tagged Divisions

Mechanical Engineering

) Page 14.103.11 m Fin parameter, ? hP kA c (1/m) M ? hPkA c θ b (W) P Fin perimeter (m) q Heat transfer rate (W) Rt,f Fin resistance, ? θ b q f (K/W) t Fin thickness (m) T Temperature (ºC, K) x Distance along fin, measured from base (m) Greek Θ Temperature difference between fin and ambient temperature, ? T - T♣ (ºC, K) ε Fin effectiveness, ? q f hA c θ b η Fin efficiency, ? q f q max Subscripts b Base of fin c Cross-section, or corrected length f Fin L Condition at fin tip max Maximum possible ∞ Condition

Conference Session

Mentoring Graduate Students

Collection

2009 Annual Conference & Exposition

Authors

Sorraya Khiewnavawongsa, Purdue University; Edie Schmidt, Purdue University

Tagged Divisions

Graduate Studies

Conference Session

Thermodynamics, Fluids, and Heat Transfer II

Collection

2009 Annual Conference & Exposition

Authors

Gerald Recktenwald, Portland State University; Robert Edwards, Pennsylvania State University, Erie; Douglas Howe, Portland State University; Jenna Faulkner, Portland State University; Calvin Hsieh, Portland State University

Tagged Divisions

Mechanical Engineering

, not on the details of data acquisition. The laboratory exercise begins with warm-up problems on the rate form of the first law, andon possible choices of control volumes for the system. We found these warm-up problems to bevery helpful because qualitative reasoning is a new skill for students, and because (in ourapproach) the students have only recently been reintroduced to the first law of thermodynamics.See Appendix B, section 3.3. The first part of the blender exercise investigates the effect of varying the amount of waterin the blender. Qualitative analysis involves manipulating the rate form of the First Law ofthermodynamics dT ˙ ˙ mc = Q

Conference Session

Thermodynamics, Fluids, and Heat Transfer II

Collection

2009 Annual Conference & Exposition

Authors

Amir Karimi, University of Texas, San Antonio

Tagged Divisions

Mechanical Engineering

undergraduate heat transfertextbooks is usually limited to fins of uniform cross-sectional area. For more complex finconfigurations, only efficiency charts are provided in most heat transfer textbooks1-15. Analysisfor fins of variable cross-sectional areas or annular fins results in more complex differentialequations. The solutions for temperature distribution involve complex functions such as Besselfunctions. The analyses for these types of fins are not typically fully covered in an introductoryheat transfer course. Instead the results are shown in the form of fin efficiency charts.The fin efficiency is defined as q act q act ϕf ? ? (1

Conference Session

Using Information Technology to Create New Information Resources

Collection

2009 Annual Conference & Exposition

Authors

Haymwantee Singh, New Jersey Institute of Technology; Richard Sweeney, New Jersey Institute of Technology

Tagged Divisions

Engineering Libraries

languageknowledgebase powered by IntelliResponse that can be updated every time a user asks a new butimportant question. There are many benefits of this empowering program such as reduction ofemail volume, phone calls and chat sessions and reduced navigation linked with website Q&A orFAQ solutions. The quality of end user experience is measured objectively via system generatedreports. Potential exists for institutions to collaborate and build such knowledgebases moreefficiently and for development of self-learning tools.IntroductionAsk the library, ask the registrar, ask the IT help desk, ask the calculus professor, ask theXXXXXX, and receive an immediate, consistent and accurate online answer to your question24x7, 365 days per year. Imagine that each time

Conference Session

Project-Based Student Learning: Part I

Collection

2009 Annual Conference & Exposition

Authors

James Everly, University of Cincinnati

Tagged Divisions

Engineering Technology

- Resistance, series form • Xs - Reactance, series form • Zmag - Impedance magnitude • Theta (deg) - Impedance angle Page 14.638.9 • Rho - Reflection coefficient magnitude • RL (dB) - Return Loss, plotted as a negative number to simulate "reverse scale" • % Reflected Power • Phase (deg) - Reflection coefficient angle • Q - Quality factor, |Xs| / Rs • Rp - Resistance, parallel form • Xp - Reactance, parallel form • Ls (µH) - Equivalent inductance for series Xs, both positive and negative • Cs (pF) - Equivalent capacitance for series Xs, both positive and negative • Lp (µH) - Equivalent

Conference Session

Sustainability in Engineering Courses

Collection

2009 Annual Conference & Exposition

Authors

Scott Morton, University of Wyoming; M.P. Sharma, University of Wyoming

Tagged Divisions

Environmental Engineering

conditions, since the ordinary effects are many orders of magnitude larger than therelativistic effects. Studies of these open systems found that energy is conserved across thecontrol surface for open systems as well as closed systems. The equation for the rate of energychange for a control volume is2: dEcv &  V2   V2  ? Qcv / W&cv − ∑ m& i  hi − i − gzi  /∑ m& e  he − e − gze  (1) dt i  2  e  2  dE cvwhere is the rate of energy change within the control volume, Q& cv is the rate of heat flow dt

Conference Session

Project-Based Learning in ECE Education

Collection

2009 Annual Conference & Exposition

Authors

Keith Hoover, Rose-Hulman Institute of Technology; JianJian Song, Rose-Hulman Institute of Technology; Edward Wheeler, Rose-Hulman Institute of Technology; James Drewniak, Missouri University of Science and Technology

Tagged Divisions

Electrical and Computer

) Tektronix Curve Tracer Agilent triple DC power supply The resulting coil inductor was measured in series with a 10 nF capacitor as in Figure 8 toobtain the resonant frequency of 1.52 MHz, which shows the inductance of the coil to be 1.096µH.3.3 The Audio Amplifier Construction and MeasurementThe audio amplifier circuit is shown in Figure 9. Please note that this amplifier uses the simplestpossible biasing circuit for simplicity, though a 3-resistor bias network would give better Q-pointstability with respect to beta variation. The beta value of the transistor is measured using a curvetracer to be 160. The DC bias Q point is then calculated as follows: Rgen Lunknown

Conference Session

Projects and Problems in First-Year Courses

Collection

2009 Annual Conference & Exposition

Authors

Vinod Lohani, Virginia Tech; Ganesh Balasubramanian, Virginia Tech; Ishwar Puri, Virginia Tech; Scott Case, Virginia Tech; Roop Mahajan, Virginia Tech

Tagged Divisions

First-Year Programs

freshman engineering class: (i) Prior knowledge survey, (ii)Nanotechnology video assigned as a homework assignment, (iii) In-class Q/A session assisted byTablet PC and DyKnow technologies, (iv) Hands-on activities, (v) Video presentation on ananotechnology experiment, (vi) Homework assignments on nanotechnology concepts, and (vii)Post-module surveyPrior Knowledge Survey: The Spring ’08 prior knowledge survey (see Appendix 1) wasimplemented on a voluntary basis and more than 50% students responded (see Figure 2). Studentresponses indicated similar type of misconceptions as were observed in the Spring ’08 pilot.Nanotechnology video presentation: Students were assigned to review a nanotechnology videothat was developed by a nanotechnology expert (i.e

Conference Session

Design in Freshman and Sophomore Courses

Collection

2009 Annual Conference & Exposition

Authors

Smitesh Bakrania, Rowan University; William Riddell, Rowan University; Krishan Bhatia, Rowan University; Leigh Weiss, Rowan University; Kevin Dahm, Rowan University

Tagged Divisions

Design in Engineering Education

a wind turbine depends on (a) the available windenergy and (b) the rotor design that determines the portion of the available energy that can beharnessed, and (c) losses due to friction and generator efficiency. The ratio of the powergenerated by a wind turbine to the available power from the wind is the coefficient ofperformance Cp. Neglecting losses from friction and generator efficiency (which can besignificant), equation 1 represents the coefficient of performance Cp, where the product of totaltorque Q and rotational speed ψ provides the rotor power; and the denominator is a function ofair density τ, swept area A and average wind velocity parallel to the axis of the turbine, U♣. Qψ

Conference Session

Environmental Engineering Curricula

Collection

2009 Annual Conference & Exposition

Authors

Audra Morse, Texas Tech

Tagged Divisions

Environmental Engineering

Q kl lta at le or al sp ct ed

Conference Session

Issues and Opportunities in IE Education

Collection

2009 Annual Conference & Exposition

Authors

Marlin Thomas, Air Force Institute of Technology

Tagged Divisions

Industrial Engineering

starts with the multidimensional definition of quality, Q ? f (Q1 ,..., Q n ) with the nelements that correspond to those factors and features that relate to how the products aredesigned, developed, produced, and used by customers. Functions involving design, production,and service have differing effects among the n dimensions, producing large impact on some andvery little on others. This of course will depend on the particular type of product. The nature ofthe dimensions makes it difficult to establish an overall simple measure of the state of quality,with some dimensions being quantitative while others are very subjective. Warranty feedback, W ? h ] g1 (Q1 ,..., Q n ),..., g m (Q1 ,..., Q n )_ does however, provide an overall weighting of

Conference Session

Introduction to Materials Courses

Collection

2009 Annual Conference & Exposition

Authors

Surendra Gupta, Rochester Institute of Technology

Tagged Divisions

Materials

is remedied by providing better training to the lab instructor.Table 4 lists one question covering a key concept from each lab that most of the studentsanswered correctly in the 2008-1 term. Column “N” indicates the number of responses, and “%”column shows the percentage for easier comprehension. Correct answers are shown in bold inthe “Key” column. In the online quiz system, the responses are randomized. Table 4: Key Question from each lab that most students answered correctly in 2008-1L#/Q# Multiple Choice Question from each lab Key N %L1/Q9 In tensile testing of metallic materials, uniform plastic deformation begins when the N 52 100 applied stress equals

Conference Session

Teaching Dynamics

Collection

2009 Annual Conference & Exposition

Authors

Ali Mohammadzadeh, Grand Valley State University; Salim Haidar, Grand Valley State University

Tagged Divisions

Mechanics

automobile as: 1 1 T = m x& 2 + J θ& 2 . (1) 2 2The potential energy is described in Equation 2 as: 1 1 k 1 ( y + x − l1θ ) + k 2 ( x + l 2θ ) . 2 2 U = (2) 2 2Rayleigh’s dissipation function describing viscous dissipation in the dampers is: 1 1 Q= 2 ( c1 y& + x& − l1θ& ) 2

Conference Session

Micromachining in Manufacturing Education

Collection

2009 Annual Conference & Exposition

Authors

Wayne Hung, Texas A&M University; Sujeev Chittipolu, Texas A&M University; Saurabh Kajaria, Texas A&M University

Tagged Divisions

Manufacturing

k n 1 QC = ∑ Δ tiVci ; Q = 1.00 (1) λ i =1 2a M . Arc cos(1 − ) tool - chip interaction time D λ= = (2) milling time 360°Where: Δti : machining time at cutting speed Vi i, j : discrete step Ti : tool life at cutting speed Vi Vc : cutting speed at the circumference Q