Using the Internet as an Aid in Technical Education John R. Ebden Seneca College Toronto Canada

Using the Internet as an Aid in Technical Education

John R. Ebden

Seneca College

Toronto Canada

STCEX Conference, Saudi Arabia

2

PANIC

Imagine you are Larry, a student in my class

It’s 2:00 am and there is a quiz on series-parallel circuits at 10:00 am

What do you do for a quick overview?

LARRY


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IDEA

I’ll check out the Self Teaching Software my prof gave us

LARRY


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ANOTHER IDEA

That was great !

Now I’ll check the on-line lecture notes

LARRY


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MORE IDEAS

We’re really rocking now

Now I’ll test a couple of circuits using the on-line files and my Electronic Workbench Bench software

LARRY


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PANIC OVER

This stuff is a breeze

I’ll see how much I know by doing an on-line practice quiz

LARRY


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HOW DOES LARRY GET ALL THIS ?

Students in my class have 24 hour access to my web page.

THIS IS THE FUTURE OF EDUCATION


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Class Web Page


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Why use the Internet for Teaching? Vast amount of material available

saves “re-inventing the wheel” can easily provide up-to-date

information Reduces communication problems Both students and faculty can work

from home


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Colleges face increasing problems Problems are a consequence of:

Government cut-backs Increased student population

(urban areas) Increased interest in

electrical/computer areas Lack of available qualified faculty


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Student Problems: Large classes Higher competition Increased fees Commuting problems Juggling school with part-time jobs


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Faculty Problems: Cut backs in course hours Teach more courses Share courses with support staff Sporadic student attendance Less time for PD


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Pessimist:

Problems will provide opportunities for growth use a course web page to help yourself and

your students

Optimist:

Problems will make life increasingly difficult carry on as you are and things will get worse


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Using a Web Page for a class provides A common forum for professor and

students A valuable communication tool A convenient storage facility for

course information A guided use to the World Wide

Web Access to software


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Helping Factors

Computers get cheaper and more powerful each year

Many students have home computers

Colleges provide server access both on and off campus


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Class Web Page


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Timetable Links directly to the department

server Timetable changes are updated

immediately Relieves room conflict problems


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Class Web Page


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Course Outline

Essential course information Schedules for laboratory

experiments Parts and tool lists College policy on plagiarism,

missed tests, etc


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Course Outline


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Class Web Page


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Assignments

List of recommended problems from each chapter

Solutions obtained in .pdf files on a separate page by clicking on appropriate assignment number


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Class Web Page


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Quizzes

Quizzes are basically a tool to ensure student is keeping up with the work

They are an excellent preparation for term tests

Quizzes are made up in more than one form and colour coded. Students with quizzes of similar colour do not sit together.


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Quizzes

Solutions to in-class quizzes are given in a similar as the assignment solutions

Practice quizzes are readily available from:

a test bank of instructor provided problems

publisher web sites


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Class Web Page


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Tests

Information on Lab tests and Term tests is provided on the web page

Solutions are available in a similar manner to that for quizzes and assignments

More than one version of each test is given to avoid students copying in large classes where they are sitting close together


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Class Web Page


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Exam

Information is provided on exam and a recommended study guide

List of practice problems can be viewed or downloaded as excellent practice for the exam


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Class Web Page


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Lecture Notes

Provides topic details with reading references for each class students missing classes can

catch up more easily less “bugging” the professor makes good re-run or review of

lecture


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Lecture Notes

Following slides are from my devices course

these notes on Diodes were created using Word and imported into Power Point

33STCEX Conference, Saudi Arabia

T he current ID th rough a d iode is calculated using:

)1e(I=I KD T/Vk

SD

w here: IS = reverse sa turation current

k = 11,600/ w ith = 1 for G e and = 2 for S iat low current levels, = 1 for bo th a t h ighcurren t levels

T K = T C + 273 o


Silicon vs Germanium

PIV ratings for Si diodes are about 1000 V and about 400 Vfor Ge diodes.

Si diodes can be used up to 200o C, Ge diodes up to 100o C.

However, Si has a junction voltage of 0.7 V, Ge a junctionvoltage of 0.3 V.


Temperature Effects

Effect of temperature on Si diode characteristics

The reverse saturation current IS will double for every 10oCincrease in temperature.

Threshold voltage levels decrease with increasingtemperature i.e forward characteristics become more ideal.

Ge has much higher increase in IS with temperatureincrease. Thus Ge is not good at higher temperatures.


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Lecture Notes

Following slides are the lecture notes for ETY155

these have been edited from slides provided by the publisher of the textbook used for the course

Chapter 7

Series-Parallel Circuits


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Analysis of Series-Parallel Circuits

To find the currents in the circuit, first redraw the circuit.

Move the source branch all the way to the left.

Reduce the circuit to a series circuit..


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Analysis of Series-Parallel Circuits

Use the Voltage Divider Rule to determine voltages.

Use Ohm’s Law to determine the currents.

Notice RT = 3 + 6 = 9 k


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Class Web Page


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Discussion Group Service provided by Netscape in

collaboration with Seneca College Restricted to students in class Threaded format available Encourage students to use this

and not personal e-mail for related questions

Gives 24 hr access to help both on and off campus


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Class Web Page


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Self Teaching Software

Provides downloadable .exe files for understanding circuits software used is professionally

produced extensive use of graphics straight text based software is not

appropriate for college students


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Class Web Page


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Electronic Workbench Files

Circuits designed that provide additional learning opportunities: comparison of a complex circuit and

its Thevenin equivalent loading effect of instruments

Following file corresponds to the series-parallel circuit described earlier Notice RT = 9 k


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Electronic Workbench Files


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Class Web Page


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Learning Aid Links

Provide convenient listing of web sites for appropriate course topics resistor colour codes Kirchoff voltage and current laws series-parallel circuits


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Class Web Page


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Links to Publisher Tests

Most publishers provide additional information related to their texts

Usually divided into chapters summary tips quizzes discussion groups


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Future Work

Video/audio aids for labs breadboarding set up of equipment soldering available on both web site and lab

workstations


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Future Work

Use of Web Page Lecture Notes directly in class by instructor using lap top less reliance on “chalk and talk” can integrate with circuit software

to support class examples can address large classes “hand-outs” easily created


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Future Work

Possible integration with commercial web software Web CT Blackboard

currently used by some faculty at Seneca College


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Conclusion

In the opening speech of the STCEX Conference, Dr Hermann Shmidt stated:

“….. In the 21 st century paradigm the primary learning focus is on the student, the secondary focus is on the teacher ……”


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Conclusion Utilisation of a class

web page achieves this objective

You got that right !! I aced my class

quiz

Larry

Documents

Using the Internet as an Aid in Technical Education John R. Ebden Seneca College Toronto Canada