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2003 GSW

Authors

Jeanne M. Gerlach; Bill D. Carroll

results.Draft standards developed by the committee for grades 8-12 are detailed in Table 1. Knowledgeand application expectations for standard 2 are given in Table 2. ConclusionsDeveloping teacher certification standards for engineering is a positive step. However, the realchallenge is attracting qualified candidates to teaching. It will be difficult for anyone notcompleting an undergraduate degree program in engineering to meet the draft standards.Another challenge is interpret the standards at a level appropriate and realistic for grades 8-12.The final step is for educators to find creative approaches to address these challenges. Proceedings of the 2003 ASEE Gulf-Southwest Annual

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2003 GSW

Authors

Mostafa Ghandehari; Samee Ullah Khan

Examples from Elements of Theory of Computation Mostafa Ghandehari Samee Ullah Khan Department of Computer Science and Engineering University of Texas at Arlington, TX-76019, USA Tel: +1(817)272-5688, Fax: +1(817)272-3784 {ghandeha,sakhan}@cse.uta.edu AbstractStudy of formal languages is a central topic in theoretical computer science and engineering.Results from number theory are used to give examples of regular and non-regular languages. Inparticular Goldbach’s conjecture gives examples of two non-regular languages whoseconcatenation is regular

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2003 GSW

Authors

James M. Gregory; Akanni Lawal; John Rivera; Lloyd Heinze; Gary Harris; Donald Bagert

now packaged at a website, E—COACH (College Optimal Advisor and Career Helper) that can be used to provide just-in-timeinformation and assessment to help students succeed in college.1 E—COACH can be accessedfrom the College of Engineering web page at www.coe.ttu.edu. Students can use this site forassessment and feedback of information in selecting a major, determining type of leadershipstrength, learning how to learn including study and time management, and sleep management.E—COACH also provides access to QUICK Advisor, which includes online scheduling andregistering for classes. While all students at Texas Tech University have access to these tools,we monitor the gpa of NSF scholars (our small test group to determine who the processes will

Collection

2003 GSW

Authors

James M. Gregory; Xuepeng Xie; Susan Mengel

percent drop in efficiency for thecombination of 0.05 percent blood alcohol and 18 hours of sleep debt. This paper willinclude information about the development and use of this model to improve studentacademic performance. IntroductionSleep is required for human life; it is just as essential as air, water, and food. Humansbecome highly stressed and eventually die when they are denied air, water, food andsleep. For air, problems develop in a matter of minutes depending on metabolism andhealth of the individual. With water, problems develop within a few days. With sleep,problems develop within a few weeks.1 For food, problems and death occur in a matterof a few months depending on the initial weight of the

Collection

2003 GSW

Authors

Melanie Hagewood; Ken Van Treuren

the turbulence generation grid and thewind tunnel itself. In summary, two major questions were explored during this experiment: 1) isthe flow at a given cross-section of the tunnel both uniform in velocity and turbulence intensityand 2) is the turbulence downstream of the turbulence generation grid decaying as expected?These two questions were evaluated by comparing the data from this experiment with the resultspresented in Roach1 . Background and TheoryTurbulence intensity, or TI, is a measure of the level of turbulence present in the flow. TI isdefined as the square root of the mean square of the fluctuating velocity divided by the time-averaged velocity, or

Collection

2003 GSW

Authors

Mohammed E. Haque

a T = Σ (wi xi) Activation function given set of input values2. An ANN is composed of simple interconnected elements called processing elements w1 w2 w3 Synaptic weights (PEs) or artificial neurons that act as Inputs coming from microprocessors. Fig. 1 illustrates a other PEs (corresponds X1 X2 X3 to the dendrites of a simple processing element of an ANN biological neuron

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2003 GSW

Authors

Chun-Ling Huang

include the ability to use symbols, learning through observation, planning,self-regulation, and self-reflection [1]. A brief description of each of these humancognitive capacities follows: Ability to Use Symbols: By the use of symbols, humans transform immediatevisual experiences into internal cognitive models that in turn serve as guides for theiractions. Through symbolizing, people also ascribe meaning, form and duration to theirpast experiences. Learning Through Observations: Learning can also occur indirectly by observingother people’s behavior and its outcomes. Individuals’ capacity to learn by observationenables them to obtain and accumulate rules for initiating and controlling differentbehavioral patterns without having to

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2003 GSW

Authors

Alfred J. Jayachandran; Edward S. Kolesar

components can readily be accomplished using microelectro-mechanical systems (MEMS) technology. Numerous electrically driven microactuators havebeen investigated for positioning individual elements in microelectromechanical systems(MEMS) with the most common modes of actuation being electrostatic, magnetostatic,piezoelectric and thermal expansion [1]. Electrostatic and Magnetostatic actuators producerelatively small forces, which are insufficient to achieve large displacements. In order to achievelarge displacements due to larger forces, piezoelectric and thermal expansion actuators should beused. Unfortunately, piezoelectric materials are not routinely supported in the fabricationprocesses offered by commercial MEMS foundries, as a result, these

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2003 GSW

Authors

H. Dwayne Jerro; Chun-Ling Huang; Patrick Mensah

principles and laws necessary forenergy transformation are also covered. These concept maps are developed in hope that thestudent will be able to qualitatively and quantitatively grasp the fundamentals and how they arelinked, and appropriately apply them in the analysis of engineering systems. IntroductionOne of the key elements to becoming a capable engineer is to be able to visualize a givenproblem. One body of thought is to (1) seek understanding of the problem, (2) formulate awritten description of the problem, and then (3) formulate a method, procedure, or schematic tosolve the problem. However, many engineering students find it difficult formulating a solution. Proceedings of the

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2003 GSW

Authors

Jennifer R. Jewers; Robert R. Bittle

. Because glass tubes have extremely smooth inner walls in comparison to the relativeroughness of a drawn copper capillary tube, the two-phase flow behavior may be different. Theproper characterization of the two-phase flow field downstream of the flash point is necessary foran accurate prediction of pressure drop and flow rate in the capillary tube.The fiberscope used was a 0.020 in. (0.51 mm) diameter glass fiber bundle roughly 39 in. (1 m)in length with at teflon coating. The fiberscope was inserted into the upstream end of thecapillary tube through a specially designed fitting. The fiberscope lens at the end of the fiberbundle was positioned approximately 32 in. (80 cm) downstream of the capillary tube inlet. Bycarefully controlling the

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2003 GSW

Authors

William Jordan

pointed out9,10,these codes are not perfect, and will not cover all the possible issues that the engineer might face.We believe that teaching about basic moral theories can give the engineer a good moral basisupon which to make decisions. In this paper we will introduce several of the basic moraltheories that have been discussed by Martin and Schinzinger7. Among the theories we will useare: 1. Utilitarian theories. 2. Duty theories. Proceedings of the 2003 ASEE Gulf-Southwest Annual Conference The University of Texas at Arlington Copyright ©2003, American Society for Engineering Education 3. Rights theories. 4. Virtue

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2003 GSW

Authors

Bill Elmore; Stan Napper

pointed out9,10,these codes are not perfect, and will not cover all the possible issues that the engineer might face.We believe that teaching about basic moral theories can give the engineer a good moral basisupon which to make decisions. In this paper we will introduce several of the basic moraltheories that have been discussed by Martin and Schinzinger7. Among the theories we will useare: 1. Utilitarian theories. 2. Duty theories. Proceedings of the 2003 ASEE Gulf-Southwest Annual Conference The University of Texas at Arlington Copyright ©2003, American Society for Engineering Education 3. Rights theories. 4. Virtue

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2003 GSW

Authors

Amir Karimi

within the College ofSciences and Mathematics and began offering undergraduate degrees in Civil, Electrical, andMechanical Engineering. In 1983 the college name was changed to Sciences and Engineering.In preparation for the ABET accreditation under the Engineering Criteria 2000 (EC-2000)1, a setof educational objectives and statements of output assessments2 were developed for themechanical engineering undergraduate program in Spring 1999. Proceedings of the 2003 ASEE Gulf-Southwest Annual Conference The University of Texas at Arlington Copyright  2003, American Society for Engineering EducationAn academic restructuring in Spring 2000 resulted in the partition of the College

Collection

2003 GSW

Authors

Jerry K. Keska; Raghavender Charupalli

fluctuations withreasonable and tractable models of performance. In the two-phase flow experiments, it isnecessary to consider the fluctuations as random. As a tool to carry out the procedure, acomputer-aided system (CAS) presented in Figure 1 and 3 is developed, which consists of thefollowing components. 1.AT-MIO-16E-2 data acquisition (DAQ) board (E series architecture 500kSamples/s, 12-bit, 16 analog input multifunction DAQ, 16 single-ended/8 differential channels, two 12-bit analog outputs, 8 digital I/O channels). 2. CB-68LP I/O Connector, having dimension 7.62 by 16.19cm equipped with 68 screw terminals for easily connecting 68-pin DAQ devices, has a vertical mounted 68-pin connector, which includes one 68-pin

Collection

2003 GSW

Authors

Jerry K. Keska; Heechan Shin

concurrent flow of air and water in a transparentvertical tube (Fig 2). The tube is 1 meter long, 35 mm in diameter and can be mounted vertically,horizontally, or at an angle. At this moment, the operator in the lab can set up the angle of tubes inneeds. The water is circulated with controlled by airflow intensity during rotameters and pressurelevel delivered by compressor installed in the lab. A web camera is focused on the tube, whichenables the remote operator to view the flow patterns in the tube. The remote operators can set boththe air and water flow rates remotely by using DAQ I/O system via network. The DAQ boards areconnected to several sensors, which are used to measure the flow parameters in the flow tube andsend back the measurement data

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2003 GSW

Authors

Jerry K. Keska

investigators, whose communications support a more effective learning process andgenerate benefits for both.One of the preliminary requirements for successful implementation of these processes is tomake appropriate choices of references used to access such resources as patents, refereedpapers and reports, and electronic databases via the library or the Internet. In the selection ofresources, two key issues are (1) the use of objective and accurate references, and (2) access tostate-of-the-art information. Two of the most important sources of information in this case arerefereed journal papers and patents. Limited subject knowledge on the part of the student, and Proceedings of the 2003 ASEE Gulf-Southwest Annual Conference

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2003 GSW

Authors

Tariq A. Khraishi

ofthe apparatus at work were taken on that day with a portable digital camera and some are shownin this paper. Some of the designs involved a sliding mechanism whereby the golf ball had toslide down a curve or path of some sort to generate linear momentum capable of flying the ballfor a horizontal distance of at least one meter (Figures 1 and 2 are examples). These designsrelied on the fact that potential energy converted to kinetic energy during the downward slide ofthe ball. Other designs involved the use of a push or pull springs to drive the motion of the ballby converting the spring’s potential energy into kinetic energy of the ball (Figure 3 is anexample). One design used torsional and not linear springs (Figure 4). Several other

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2003 GSW

Authors

Akanni Lawal; James M. Gregory; Lloyd Heinze

and tips on how to teach engineers skills ofcommunicating will be presented. IntroductionDr. Bill Wulf, President of the National Academy of Engineering, stated that it is important forengineers to “know how to communicate effectively.”1 Dr. Wulf’s statement indicates the valuethat communications skills add to engineering graduates. While many engineering studentsresist instruction in communications, they, nevertheless, must have communications skills tosucceed in the modern world of engineering.The challenge is to develop a class that makes the education of communication science and thedevelopment of communication skills efficient and interesting. This challenge has been met with

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2003 GSW

Authors

W. Conway Link; Carlos G. Spaht

ofproportionality was determined for each of four different weights, using the formula Y = k X,where Y is the displacement in millimeters, X is the weight in grams, and k is the constant ofproportionality.Spring #1:X (grams) Y (displacement) k (constant of proportionality)1. 50 0.6 0.0122. 150 1.2 0.0083. 250 1.5 0.0064. 500 2.2 0.0044Spring #2:X (grams) Y (displacement) k (constant of proportionality)1. 20 10 0.502. 40

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2003 GSW

Authors

W. Conway Link; Carlos G. Spaht; Rogers Martin

files and other informationthat students may assess at any time from any location.One of the advantages of the Blackboard system is that it makes available to the instructor thetotal number of accesses (“hits”) per area, number of hits over time, user hits by hour of the day,user hits by days of the week, and number of hits by student. For this study, the investigators hadtwo goals: (1) To fit a linear regression model to the data, using the number of Blackboard hits asthe independent variable and the percent of the student’s total possible number of points in thecourse as the dependent variable; and (2) By using the coefficient of determination, the square ofthe correlation coefficient, to determine how well the regression model fits the

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2003 GSW

Authors

Jiecai Luo; Pradeep K. Bhattacharya

AbstractIn the course of microelectronics, Widlar current source amplifiers are very important part of theclass courseware. Specially, in design of BJT Widlar current source amplifiers for the givencurrent and extra resistor, a student must solve a nonlinear equation to get desired current outputand this turns out to be a difficult step in design. In this short paper, a new convergenceguaranteed algorithm to solve the nonlinear equation is developed, some simulation results arealso provided. With this new algorithm, students can easily do their design. 1. IntroductionMicroelectronics is intended as a core course in electronics for undergraduate electrical andcomputer engineering students. A majority of

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2003 GSW

Authors

Pauline Melgoza

, Document Delivery & Information Supply, v.11,No.4, 2001, pp.37-50.2. Blackboard Homepage, URL: http://www.blackboard.com/3. Carver, C.A., Hill, J., Udo, W. 1999, “Emerging Curriculum Issues in Digital Libraries,” Proceedings – Frontiers in Education Conference, San Juan, Puerto Rico, Nov.10-13, 1999, pp.C12-C18.4. Kearley, J.P., Lange, K.S. 2001 “Partners in Emerging Technology: Library Support for Web-Based Course,’ Journal of Library Administration, v.32,No.1/2, 2001, pp.267-280.5. Leckie, G.J., Fullerton, A. 1999 “Information Literarcy in Science and Engineering Undergraduate Education: Faculty Attitudes and Pedagogical Practices,” College & Research Libraries, v.60,No.1, 1999:Jan., pp.9

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2003 GSW

Authors

Kevin M. Nickels; Mahbub Uddin

and exception. If each student is givena small fixed number of exemptions a-priori, however, the administration of deadline extensionsis greatly simplified and conducted fairly.To address these problems, the authors in the Department of Engineering Science at TrinityUniversity adopted a Late and Regraded Homework Policy for several engineering courses. Thepolicy and the list of courses are outlined in Figure 1 and Table 1 respectively.The policies listed in Figure 1 have possible pedagogic benefits. The regrade policy addresses acommon desire of instructors to have students revisit past work to learn from our corrections andfrom their past mistakes5. There may also be indirect benefits by increasing the efficacy ofcoursework subsequent to the

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2003 GSW

Authors

William E. Odom; Edward S. Kolesar

[1]. Unfortunately, theforces produced by electrostatic and magnetostatic actuators tend to be small, and to achievelarge displacements, it is necessary to either apply a large voltage or operate the devices in aresonant mode. On the other hand, piezoelectric and thermal expansion actuators can beconfigured to produce large forces and large displacements. Unfortunately, piezoelectricmaterials are not routinely supported in the fabrication processes offered by commercial MEMSfoundries. As a result, these limitations have focused attention on thermally-actuated devices forgenerating the large forces and displacements frequently required to position and assemblecomplex MEMS [2].This research focuses on improving the design and performance of

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2003 GSW

Authors

Brandon D. Pitt; Tristan J. Tayag; Mendy L. Nelson

configuration, and we have incorporated a feedback controller as shown in Figure 1 tostabilize the interferometer’s mean optical path length difference at quadrature6. The stabilizedinterferometer signal must then be demodulated to determine the vibration amplitude of thetarget.Digital signal processing (DSP) is a useful method of analyzing and manipulating aninterferometer signal. The architecture and instruction set of digital signal processors are optimalfor the high-speed, mathematically intensive calculations involved in demodulation. Theadvantages of DSP include programmability, computational sophistication, flexibility, and low-cost. In this paper, a novel method of demodulating a stabilized interferometer using DSP isdescribed. First, a

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2003 GSW

Authors

Kuldeep S. Rawat; Gholam H. Massiha

can be described using one or more of these components can besimulated in RoboCell.The other system paraphernalias like conveyors; tables, parts feeders, etc. are realisticallysimulated without any further programming. Even commonly used sensors like optical sensors,are entirely simulated within RoboCell. It also provides a 3-D Graphical Display and UserInterface to allow users to observe and interact effectively with the RoboCell simulation.Meanwhile, the whole program can be saved, stopped, repeated and reset easily. Figure 1 showsa typical setup of an educational robot. Proceedings of the 2003 ASEE Gulf-Southwest Annual Conference The University of Texas at Arlington

Collection

2003 GSW

Authors

A. C. Rogers; Amir Karimi

$250 per team design project are typically provided each semester. By useof existing laboratory resources most teams do not require but a small fraction of their allocatedcost. Some teams, however, have been allowed to exceed their $250 allowable budget when suchexpense enhances the operation of any of the sixteen test stations listed in Table 1. For example,the purchase of equipment for data acquisition and control (transducers, DAC boards, andmultiplexer units) and replacement of faulty parts (pumps, valves, etc) needed for the studentsdesign projects involve costs additional to the standard budget for each team. This approach hasnot only enhanced the quality of our students design projects, but has proven to be a costeffective process for

Collection

2003 GSW

Authors

Edward S. Kolesar; Matthew D. Ruff

robust, three-dimensional structures whose components are fabricated as planar entities. The planar entitiesare then rotated out of the plane of the silicon substrate on integrally fabricated hinges, wherebythey are assembled and joined using arrays of open windows and microrivets. The resultingthree-dimensional structures not only manifest IC quality resolution in both the planar andvertical dimensions, but now the vertical feature sizes that are realizable span from 1 µm tonearly a millimeter. The fabrication process for producing three-dimensional structures frommicrohinged and latachable polysilicon panels was developed using the popular Multi-UserMicroelectromechanical Systems (MEMS) Process (MUMPs) foundry and material system. It

Collection

2003 GSW

Authors

E. H. Shaban

unsatisfactory grade in a course that he taught in a regular basis. Thedepartment asked the faculty member to reconsider a grade change for the graduatingstudent and the faculty member refused. An administrative decision allowed the studentto take an extra test and the student graduated. This incident created an unpleasantenvironment and personality conflict for the faculty member involved with thedepartment. The lawyer used this case during the trial to support the faculty member’slawsuit. The court agreed with the faculty member claim and awarded him the financialloss he suffered for teaching during the summer of 1989 [1].In the summer of 1996, a similar case took place in the same department between afaculty member and another chairman. The faculty

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2003 GSW

Authors

Mohammed Shahbazuddin; Dr. Terrence. L Chambers

in thesupply chain. [1] Proceedings of the 2003 ASEE Gulf-Southwest Annual Conference The University of Texas at Arlington Copyright  2003, American Society for Engineering Education Variability in Supply ChainThe key to understanding supply chain performance is to understand the variability in thesystem. Following are some of the sources of variability in a typical supply chain:Manufacturing: Stock out situations Parts not arriving on time for subassembly operations Machines breaking and disrupting production Labor problems Machine set up/retoolings New product line introductionsWarehousing