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 experiments offered 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 stations More 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..... Document Server LabSERVER LabCLIENTs File Sharing

9. SYSTEMCONTROL Set Point Output - + Classical Control Systems

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

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

12. Pressure Temperature Flow

13. Level, 2-tanks Speed and Voltage

14. Ch E Laboratory Equipment Details 10 - Stations Distillation Filter Absorber Dehumidifier Heat Pump Drying Oven Combustion Heat Exchanger Cooling TowerPressure 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 Input Results Input = 50%, t < 5 sec Input = 90%, t > 5 sec 40K t o 

21. Step Input Results 40K t o  h

22. Step Input Results

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

24. Step Input Results 40K t o 

25. Step Input Results 40K t o 

26. Step Input Results 40K t o 

27. Step Input Results 40K t o 

28. t o

29. Diponegoro University, Indonesia University of Koeln, Germany

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

31. SYSTEMCONTROL Set Point Output - + Direct Connection Custom Software SERVER Input Data 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 troubleshooting3.5 new learning3.5

39. Pedagogy -Student responses From Anonymous Student Survey, UT-Chattanooga, 2001 how much you think you have been helped... +1 S.D. to Mean organization of experimental testing efforts3.4 effective data analysis3.4 obtaining and analyzing experimental data3.4 the care needed to obtain reasonable data3.4 General familiarity with engineering equipment, experimental design and planning3.3 report writing that is brief and to the point with well documented calculations included3.3 engineering analysis3.3

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