. Each question is repeated for clarity and some general commentary concerningthe results of each is given. Page 11.22.3Q-2 How many years have you been attending Northeastern University? Q-2 TOTAL Average 3.84375 Median 3 Maximum 12 Minimum 0 EET Average 4.025 Median 3 Maximum 12 Minimum 0.25 MET Average 4.543478
Students as ChangemakersKumar GargSenior Fellow, Society for Science & the PublicFormerly Senior Advisor, White House Office of Science and Technology Policy 1 Outline Resonant Themes Lessons LearnedKeeping Eye on Equity Q&A 2HonorofaLifetime 3 ResonantThemesHands-on, or bust. CS + X.Citizenship in 2018. 4 BuildingCross-SectorPartnerships• Set a self-evident goal • Think of the end at the beginning. • Write it down. Make it happen.• Build an “imagine-if” list • Entrepreneur is someone who is not limited by the
to design the bestpossible structure that can guarantee task completion. Taskspecifications can either be kinematic or dynamic. The Fig. 1. Example of manipulator task requirementultimate goal of task-based design model is to be able togenerate both the manipulator kinematic and dynamic Similarly, for an n degree of freedom manipulator, the jointparameters, using the task description and operating vecto q rcan be a said to be a point in the n dimensional Jointconstraints [16]. Space (Q), such that: q = [ q1 , q2 ,…, qn ] ∈ Q Paredis and Kholsa [14], use the task requirements to find
Logic Gate 220 Ohm Resistor 9VExercise 2As practice with logic gates, you will need to identify all the Ts and Fs for the logic gate as well as determine what type of logicgate it is (i.e., AND, OR, XOR, NOR, NAND, XNOR) in the provided truth table. Note, if the light is on, then the statement istrue. If the light is off, then the statement is false. Pictures for each stage have been included. Switch P & Switch Q are labeledon the first picture. Q P Both Switch P and Both
illustrates a comparison of the Likert values for theoverall class (including tablet PC users, notebook users and conventional paper and pencil users). 100% 80% 60% Strongly Agree Agree Disagree 40% Strongly Disagree 20% 0% 1 2 3 4 5 6 7 8 Q 9 Q0 Q1 Q2 Q3 Q4 Q5 16
. If it fails, one will go back to the first step and build a new model [8].The diagnosis section consists of the estimation of Q-matrices and using these Q-matrices toprovide insight into the dependency between the variables of BoT and the TC. In this paper, weused the GDINA function from the CDM package [9], [10] to retrieve the delta matrices that areessential to the estimation of the Q-matrices. The initial Q-matrix given to the GDINA functionis always 1J x K. Both the Lasso and the Truncated L1 penalty (TLP) terms were used as tuningparameters to retrieve the delta matrices which were then converted to Q-matrices following asimilar expectation–maximization (EM) algorithm in [11]. We also used our experience to comeup with one expert
their union is regular.IntersectionIf L1 and L2 are two regular languages, then their intersection is regular.⇒ ∃ Deterministic Finite Automata (DFA)1 M 1 and M 2 such that L1 = L( M 1 ) and L2 = L( M 2 ) ,where M 1 = (Q, ∑ , δ 1 , q0 , F1 ) , M 2 = ( P, ∑ , δ 2 , p0 , F2 ) . , ∑ ,δ 'Construct M '= (Q' ) , where Q'= (Q × P ) and , (q 0 , p0 ), F 'δ '((qi , p j ), a) = (q k , pl ) if w ∈ L( M ') ⇔ w ∈ L1 ∩ L2 .ConcatenationIf L1 and L2 are two regular languages, then the concatenation L1 L2 is regular.ComplementIf L is a regular language, then the complement L is regular.⇒ ∃ DFA M such that L = L( M ) . Construct a DFA M 'such that the final states in M arenon-final states in M 'and
background in metalworking based manufacturing. I undertook the modeling to enhance the students’knowledge regarding the behavior of the reactor, at least in a qualitative manner. Themodel allows the simulation of the reactor via parameters such as cross-sectional area ofreactor, molar flow rates of reaction components, built-in heating, q inside the reactor,inlet temperature of reactants and reactor length. Due to unforeseen circumstances, thestudents completed building the reactor at the end of the semester and had no time to runthe experiment. I have simulated hydrogen production on the computer using matlab.This should prove to be a valuable tool in running the hydrogen production experiment.Reactions Within the Packed Bed Reactor/Theory Behind
the form h( z , t ) = b0 {φh1 ( z ) qh1 (t ) + φh 2 ( z ) qh 2 (t ) + φh 3 ( z ) qh 3 (t )} (1)where φh1 ( z ), φh 2 ( z ) , and φh 3 ( z ) are modes of deformation. A comparison of flutterspeed obtained by using different number of modes (n=1,2…) of deformation will givesome indication of the degree of accuracy achieved. In this paper, two-degree of freedom(bending, pitch) are selected because they provides a system, which is not only easilyevaluated in physical terms but also from the computational point of view. Finally, thetwo-degree of freedom equations of motion can be derived using the Lagrange’s principleyielding to, ⎡ M hh b0 M hα b0 ⎤ ⎧ q&&h ⎫ ⎢M b
study. i. Two projects/case studies (one for water treatment plant design and the other for wastewater treatment plant design) were good enough for a semester. j. Two field trips to local water and wastewater treatment plants enhanced my understanding and learning of the subject Page 26.1270.5 matter. k. Learning new topics by example during the project work was a good experience. l. Guest speaker enhanced my interest about environmental engineering. Q.4 What did you like most about the inclusion of the design projects
hedid not sustain the students’ interest with several hands-on design activities, such as building anairplane, a tower, a bridge, guest speakers, field trips, readings about the design process, andteam presentations, Mr. Q. was not able to pay enough attention to some aspects of the classwhich inhibited the success of the program. For example, the video presentations or activitieswere selected to reflect the interests of the students, as indicated by student questions ordiscussions. Gender and minority interests were not explicitly taken into consideration. Forexample, most videos focused on disasters resulting from engineering mishaps videos that mightshow the relevance of engineering to society. Furthermore, difficulties were encountered
after the castingsolidified to prevent shrinkage voids in the casting and is based upon Chvorinov’s Rule.Chvorinov’s Rule for solidification is: t = q(V/SA)2 (1)The solidification time constraint becomes: tr ≥ tc (2)which becomes: qr(Vr/SAr)2 ≥ qc(Vc/SAc)2and can be reduced to: (Vr/SAr) ≥ (Vc/SAc) (3)where: tr = solidification time of the riser tc = solidification time of the metal casting qr = qc= solidification constants for the molding material are equal as both the riser and
class that week. These assignments were collected and a subset of the problems were graded for correctness. Homework solutions were provided after homework was collected. Quiz only (Q): Students were encouraged to complete weekly homework assignments similar to those given for assessment H. Homework was not collected, and students were also given solutions at the time the assignments were assigned. Students then completed an in- class quiz the day the homework assignment was “due,” consisting of one problem very similar to one of the homework problems. Quiz and homework (QH): Students completed weekly homework assignments similar to those given in the other two modalities. The assignments were collected
function L as the differencebetween the robot’s kinetic energy K and potential energy P , which are functions of the robot’s T Tconfiguration q = θ1 , θ2 and velocities q˙ = θ˙1 , θ˙2 : L(q, q) ˙ − P (q) ˙ = K(q, q) (1)To derive the Euler-Lagrange equations, the partial derivative of the Lagrangian with respect toeach of the generalized coordinates qi , i = 1, 2 are calculated, and the time derivative of the partialderivative of L with respect to the velocities q˙i are taken. The resulting expressions are set equal tothe
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
tube. The solution subroutine was modified and used to explore what value ofrelaxation worked best for the solution scheme. Figure A-1 shows the new pressure gradientafter each iteration for relaxation values of 1 and 0.5. The process converges very slowly with arelaxation of 1, while it converges rapidly with a relaxation of 0.5.The solution also demonstratesthe abilities of MathCad to handle units. The result is presented in correct units even afterpassing through the iteration program.VI. Subcooled Boiling Heat Transfer ProblemA double-pipe counterflow heat exchanger is constructed with water flow in the tube side and oilflow in the annulus side. q oil
the patient weighs 70 kg, has a heart rate of 70 beats/min. Then, for each minute, theheart pumps 70 beats/min * 70 ml/beat = 4900 ml/min. The mass would be 4.9 kg/min (mass density * volume). Wealso assume that cp (related to the heat capacity) for blood and the body is the same (0.87). Then one can do abalance (assuming that heat and temperature behave similarly),cp 1q -qn n +1 6 f 2 = - heart q n+1 - q chiller 7 [1] Dt mbodywhere:cp = exchange factor between the blood and bodyq n+1 = the body temperature at the next time step (degrees C)q n = the body temperature at the last time step (degrees C)f
(1) DmWe did, however, created experiments to measure solid/liquid equilibria, q* and pore diffusioncoefficient, Dp followed by a capstone fixed bed adsorber experiment.Equilibrium Isotherm. The equilibrium isotherm describes how the adsorbate molecule distributesbetween an adsorbed state and bulk fluid phase. The familiar Langmuir isotherm model representsthe solid/liquid equilibria bc q* = 1 (2) 1 + b2 cIf the adsorption becomes highly favorable, the isotherm approximates a rectangular or irreversibleform (c = 0, q* = 0; c
unit length of this arrangement isC = qc/∆ϕ=qc/2ϕo (F/m), and the stored energy per meter is qc2/2C = qcϕo. Figure 1 showsthe lines immediately after we close the switch connecting the wires, showing the capacitordischarge as a result of current that flows along the lines.Since the velocity of electrical change propagates with the speed of light, c, the discharge surgemoves with this speed. It therefore removes capacitive charge at the rate I = qcc. Figure 1. Capacitive, moving charge relationsThe discharge results in a loss of capacitive potential energy. Ignoring radiation this must betransformed to kinetic because the current consists of conduction electrons, of density q +,moving at a mean drift velocity, u, so that I=q+u
+ Q = F (t ) (1) dt CHere t denotes time, Q denotes the charge on the capacitor at time t, R denotes the resistance ofthe resistor, C denotes the capacitance of the capacitor, and F(t) denotes the applied voltage. Oneway to view equation (1), which we shall call the mathematician’s point of view, is that thismodel equation is simply a first-order linear ordinary differential equation for which there is awell-established solution procedure. (See, for example, Edwards and Penney4 pp. 46 – 47.) Thispoint of view is satisfying to the mathematician because it demonstrates the utility ofmathematics. However, regarding the RC circuit as a “solved problem” does not
2.361.2FORTRAN.A simplified carbon flow model for a plant leaf is shown in Figure 1. Some of the CO2 capturedby photosynthesis is used for respiration and some is converted to carbohydrate. Some of thiscarbohydrate is subsequently used for leaf cell growth, and some is translocated to the stem.Figure 1. Simplified carbon flow model for a plant leaf.The concept of mass flow into and out of a reservoir is shown in Figure 2. Here, wateraccumulates in the reservoir until the head (H) is large enough to cause flow, ( Q o Q i ). dH A k H Q i (1) dtStudents use numerical integration to solve this equation
described using five steps as follows: Step 1: Draw free body diagram (FBD) with dummy load Q, at secondary axis location, , and solve for reaction forces using statics. Step 2: Write the moment equation M(x,) for the entire length using discontinuity terms coupled with a Heaviside function H(x,). M(x, ) Step 3: Take the partial derivative with respect to the dummy load, . Q Step 4: Set Q=0 and write M(x,) for Q=0. 1 L M ( x, )Q0 M ( x, ) E 0 Step 5: Write the integral
is written as ( jω ) + j 2ζω oω + ω 02 = s 2 + 2ζωo s + ω02.14 Another form is written as 2 1 s s 1+ + Q ωo ωo I will use this form for the illustration of Middlebook’s low entropy approach to analyzingsecond order circuits. The familiar Q (quality factor) represents how frequency selective thecircuit is and ωo can represent a resonance frequency or a reference frequency for the secondorder frequency response. The familiar series RLC circuit configured as a low pass network, shown in Figure 6, canbe
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 pFigure 2. The average number of transmissions required to send one packet across a singlenetwork link. 1 0.9 0.8 0.7 0.6 q(1,2) 0.5 0.4 0.3 0.2 0.1 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 pFigure 3. The probability that
cross section of the questions of each survey.Table 3. A Sample of Survey Questions Current Secondary School Students survey Peer survey Q.4 When working through a Math problem, how Q.3 Are you currently a student in engineering? excited do you typically feel after you have solved it? (5=very excited, 1=very bored) Q.5 How interested are you in the way things work Q.4 If you are no longer a student, are you working (5=very interested, 1=not interested at all) in an engineering related field? Q.7 Have you ever learned about engineering? Q.7 Why did you choose to study engineering? Q.8 What do you think an engineer does in his/her
was a search for a significant engineering concept related to solidification.The search started with defining and quantifying the process. If the process is done in a fluid (airor water), then convection is prominent and can be described in the equation below: q=Q/t=A*h*∆Twhere: q is the heat flow rate (amount of heat per time) Q is the amount of heat t is time A is the area of contact between the two objects (cast material and cast mold) h is the ‘film coefficient’ (related to the interface of cast and mold) and T is the Temperature (∆T is the change in temperature)Once the cast material (soap) and molds were chosen, the film coefficient and area is set. Theavailable heat is also set by the melt
effects of compressor efficiency and turbine efficiency on the following dependent variables in the Brayton Cycle: q Compressor Work q Turbine Work q Cycle Net Work q Power Produced by the Cycle Net Work q Cycle Thermal Efficiency Determine whether there are any interactions of compressor and/or turbine efficiency with the pressure ratio.GIVEN: q Constant Specific Heats q Air as the working fluid q Input parameters: a) Atmospheric Pressure: 14.7 psia b) Inlet Air Temperature: 100(F c) Turbine Inlet Temperature: 2000(F d) Air, mass flow rate: 140 lbm/sec e) Compressor Efficiency: 70%, 85% & 100
analysisprocedure. A subsection will be devoted to each step.Step 1:An overall mass balance for a differential length of the packed bed of adsorbent particles shownin Figure 1 yields the following equation: ε ∂P = − ε ∂ ( PU ) − 1− ε q RT ∂t RT ∂x ( ) (1)where P is the pressure, U is the gas velocity, q is the rate of nitrogen adsorption per unitvolume of adsorbent particles, x is the axial distance, t is time, R is the gas constant, T is theabsolute temperature, and ε is the porosity of the packed bed. The first term in the aboveequation is the accumulation of total mass in the differential volume element; the second term isthe advection of
, at a bit rate of 512 kbps. Consideringthat most students do not have any experience in building RF boards, we chose to use thecomponents from Mini-Circuits R as our system building modules. Key Mini-Circuits modulesincorporated in our design are listed in Table 2. In addition, Mini-Circuits amplifiers and filtersare also used to complete our design. Block diagrams of transmitter and receiver RF portionsare shown in Figures 1 and 2, respectively. Table 2. Components Used from Mini-Circuits R Part Description Frequency Range (MHz) ZFMIQ - 10M I & Q Modulator 9 - 11 ZFMIQ - 10D I & Q Demodulator
paper and show how these general functionalforms can be used to determine the deflection of arbitrarily loaded beams of non-uniformflexural rigidity. The level of mathematical rigor employed in this paper is intentionallyaimed at a level typically taught in an introductory-level calculus course and typicallyencountered by a first- or second-year mechanical engineering student.2. Shear-moment distributions and beam deflections Much of what follows in this section is taken from Boedo [10] and is presentedhere for completeness. Figure 1 shows a beam subjected to an external load distributionq(x). The origin of the x,y coordinate frame is attached to the left-most end of the beam,and the y-axis points upward. The load distribution q(x