Web-Based Laboratories: Technical and Pedagogical Considerations

1. Web-Based Laboratories: Technical and Pedagogical Considerations Jim Henry, Ph.D., P.E. College of Engineering and Computer Science University of Tennessee at Chattanooga AIChE, 2001 Reno, NV

2. Chattanooga,Tennessee

3. What are "Web-Based Laboratories"? Lab experimentsoffered via the WEB WHY ? Accommodates Scheduling Problems Can serve equipment-challenged campuses It's all the go to get on the Web We enjoy doing this stuff

4. What are “Technical Considerations”? How is it done Available stationsMore reliability More experiments More accessibility Ease of use

5. What are "Pedagogical Considerations"? Student support offered via the WEB Outcomes and Assessment Teaching and Learning expansion Team mailing lists Discussion Forums FAQ Intelligent Agent responder

6. Good News- Bad News Hardware experiments It works It's reliable Managing "distant" students

7. The Connections WWW based Netscape or Internet Explorer Familiar & accessible & friendly Direct via Internet Custom LabVIEW programs Other software to use MATLAB, e.g.

8. WWW Protocol INTERNET . . . . . LabSERVER Document Server File Sharing LabCLIENTs

9. Classical Control Systems Set Point Output CONTROL SYSTEM + -

10. Laboratory Remote Operation Set Point Output CONTROL SYSTEM + - LAB SYSTEM (server) USER (client)

11. Controls Laboratory Equipment Details 7 - Stations All S.I.S.O., “Stable” Pressure Level Voltage Speed Flow Temperature Position

12. Temperature Pressure Flow

13. Speed and Voltage Level, 2-tanks

14. Ch E Laboratory Equipment Details 10 - Stations Distillation Filter Absorber Dehumidifier Heat Pump Drying Oven Combustion Heat Exchanger Cooling Tower Pressure Swing Absorption

15. Distillation Pressure Swing Absorption

19. Laboratory Experiment Details System Identification Steady-State Step Ramp Sine Pulse "Custom" Feedback Control Proportional w/ bias Proportional Integral

20. Step InputResults Input = 50%, t < 5 sec Input = 90%, t > 5 sec 40K t t o

21. Step InputResults • h 40K t t o

22. Step InputResults

23. Step InputResults Input = 50%, t < 5 sec Input = 90%, t > 5 sec 40K t t o

24. Step InputResults 40K t t o

25. Step InputResults 40K t t o

26. Step InputResults 40K t t o

27. Step InputResults 40K t t o

28. t o

29. Diponegoro University, Indonesia University of Koeln, Germany

30. Direct Connection Your Computer INTERNET . . . . . TCP/IP LabCLIENTs

31. Direct Connection Custom Software SERVER Set Point Input Data Output CONTROL SYSTEM + - Output Data

33. May-June, 2001

34. Web Sites chem.engr.utc.edu link to this paper: chem.engr.utc.edu/AIChE

36. Web Sites chem.engr.utc.edu link to this talk & paper: chem.engr.utc.edu/AIChE

37. Pedagogy -Student responses We can pick the time to meet to run the labs instead of being required to be here for a set class time The ability to perform experiments from remote locations

38. Pedagogy -Student responses From Anonymous Student Survey, UT-Chattanooga, 2001 how much you think you have been helped in these areas by remote operation of laboratory equipment or access to data an graphs on the web +1 S.D. approach to effective operation and troubleshooting 3.5 new learning 3.5

39. Pedagogy -Student responses From Anonymous Student Survey, UT-Chattanooga, 2001 how much you think you have been helped ... +1 S.D.toMean organization of experimental testing efforts 3.4 effective data analysis 3.4 obtaining and analyzing experimental data 3.4 the care needed to obtain reasonable data 3.4 General familiarity with engineering equipment, experimental design and planning 3.3 report writing that is brief and to the point with well documented calculations included 3.3 engineering analysis 3.3

40. Pedagogy -Student responses You can run experiments during class time or at 3AM as well as turn in your reports at any time over the web I liked the freedom of the lab It worked out well being able to work at different times

41. Pedagogy -Student responses This was a new experience. Especially running the experiments on the Web, and sending the assignments by e-mail Web access learning is very important these days, when a lot of information is available and e-mail is taking the place of traditional phone calling and letter writing.

42. Pedagogy -Student support Educational Materials for Remote Laboratory Operation descriptions of the equipment examples of experiments procedures for conducting the experiments sample topics

43. Pedagogy -Student support • expert system – LISA • Laboratory Instruction Student Aide • (a laboratory assistant bot)

44. Pedagogy -Student activities Problem-oriented activities that are open-ended, and multi- or interdisciplinary Visual formats that allow creation of mental models A rich learning environment containing a variety of interactive resources

45. Pedagogy -Student activities Cooperative group work, emphasizing shared intelligence Learning through exploration and discovery Authentic assessment, emphasizing the qualitative nature of student work

46. Vision & Plans Dissemination opportunities www.RealLabs.net -- New systems -- Renovated and Updated systems

47. Acknowledgements Tennessee Taxpayers National Science Foundation UTC's Center for Excellence in Computer Applications National Instruments Microsoft Corporation Creative Engineering Laboratory Systems Lupton Renaissance Fund