Experiences with Streaming Video Libraries in Signals and Systems Michael J. Wozny  Alan A. Desrochers [email_address]   a...
Outline <ul><li>Course Background: Signals and Systems </li></ul><ul><li>Student Background </li></ul><ul><li>Basic Proble...
<ul><li>A required junior-level course in Electrical Engineering and Computer and Systems Engineering </li></ul><ul><li>En...
<ul><li>Each lecture contains: </li></ul><ul><ul><li>two or three basic concepts, </li></ul></ul><ul><ul><li>including fun...
Student Background   Mathematics:  Calculus and Differential Equations   Many students are comfortable with mathematics, w...
Basic Problems   <ul><li>No time to review mathematical background (not all students need a review) . </li></ul><ul><li>No...
<ul><li>More than 200 videostreams, 10-15 minutes long. </li></ul><ul><li>Each videostream solves a single specific proble...
<ul><li>Recorded on campus at the  Anderson Center   for Innovation in Undergraduate Education. </li></ul><ul><li>They are...
 
 
Web-based Videos (continued) <ul><li>Students can fast forward   to steps they do not understand or rewind for review and ...
“ Video streams were very useful for learning; each step explained”, “ I can see the professor’s reasoning process as he e...
Student Evaluations (continued) “ Being able to replay the videos is helpful”, “ They are good for reviewing for tests”, “...
<ul><li>Keep the videostreams short. </li></ul><ul><li>Students want results: don’t want to search  through lots of materi...
Fall 2004 Results   Number of hits: 10,028 Average Number of Hits/Grade Category A(15) 118.7 B(25)   92.4 C(30) 113.9 D(10...
Sample Usage for Dec. 16 Final Page Name  Time of Access 100 topic 13: modeling & control--(6:28 min)  December 16, 2004 5...
Fall 2004 Final Exam Usage   Date of Final: Dec. 16, 8a.m. – 11a.m. Last Access <  12/15, 5pm   5pm-1am   1am-7:59am  none...
<ul><li>Cover more topics. </li></ul><ul><li>Need improvements in cross-referencing material. </li></ul><ul><li>Include mo...
Acknowledgments <ul><li>Financial Support provided by the Vice Provost’s Office at Rensselear. </li></ul><ul><li>Technical...
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Experiences With Streaming Video Libraries in Signals - Anderson ...

  1. 1. Experiences with Streaming Video Libraries in Signals and Systems Michael J. Wozny Alan A. Desrochers [email_address] aad@ ecse .rpi.edu Electrical, Computer, and Systems Engineering Department Rensselaer Polytechnic Institute Troy, NY 12180
  2. 2. Outline <ul><li>Course Background: Signals and Systems </li></ul><ul><li>Student Background </li></ul><ul><li>Basic Problems </li></ul><ul><li>The Web-based Videos </li></ul><ul><li>Student Evaluations </li></ul><ul><li>Results and Observations </li></ul><ul><li>Future Work </li></ul><ul><li>Acknowledgments </li></ul>
  3. 3. <ul><li>A required junior-level course in Electrical Engineering and Computer and Systems Engineering </li></ul><ul><li>Enrollment: 250 students/year at Rensselaer </li></ul><ul><li>Topics include: linearity and superposition, Fourier series, Fourier transforms, communication systems (AM radio), Laplace transforms, feedback control, and z -transforms. </li></ul><ul><li>A “gateway” course to all courses in communications, control, computer networks, signal and image processing - many fundamental concepts are covered. </li></ul>ECSE-2410: Signals and Systems
  4. 4. <ul><li>Each lecture contains: </li></ul><ul><ul><li>two or three basic concepts, </li></ul></ul><ul><ul><li>including fundamental derivations, </li></ul></ul><ul><ul><li>and one or two examples per concept. </li></ul></ul>Signals and Systems (continued) <ul><li>Different sections are taught by different instructors. </li></ul><ul><li>To the students, the course appears to be too abstract and rigorous. </li></ul>
  5. 5. Student Background Mathematics: Calculus and Differential Equations Many students are comfortable with mathematics, while others have - a weak understanding of basic concepts, - difficulty with basic operations of integration and differentiation, - a lack of intuitive understanding. Some students perceive Signals and Systems as another “Math” course.
  6. 6. Basic Problems <ul><li>No time to review mathematical background (not all students need a review) . </li></ul><ul><li>No time to solve enough examples to sufficiently cover the concepts. </li></ul><ul><li>Difficult to cover practical applications because the fundamentals are not well understood. </li></ul><ul><li>There is a wide range of student math skills. </li></ul>Our Approach: Create a web-based roadmap of concepts directing students to a variety of focused videostreams.
  7. 7. <ul><li>More than 200 videostreams, 10-15 minutes long. </li></ul><ul><li>Each videostream solves a single specific problem aimed at reinforcing the student’s understanding of that particular concept. </li></ul><ul><li>Some videos provide background or review material. </li></ul><ul><li>Some videos cover basic concepts only. </li></ul><ul><li>Video solutions to past exams and finals are included. </li></ul><ul><li>Video solutions to current exams are “posted” shortly after the exam is given. </li></ul>The Web-based Videos
  8. 8. <ul><li>Recorded on campus at the Anderson Center for Innovation in Undergraduate Education. </li></ul><ul><li>They are stored on a server and accessed via interactive menus that partition the 16 major course topics. </li></ul><ul><li>Students log-on to WebCT from their laptops. </li></ul><ul><li>Problem statements are available in an Adobe Acrobat pdf file with live links to the videostreams. </li></ul><ul><li>Students click on the pdf statement to obtain a videostream segment under Windows Media Player. </li></ul>Web-based Videos (continued)
  9. 11. Web-based Videos (continued) <ul><li>Students can fast forward to steps they do not understand or rewind for review and clarification. </li></ul><ul><li>Students work at their own pace. </li></ul><ul><li>In use for four years by 7 professors. </li></ul><ul><li>Sample video </li></ul>
  10. 12. “ Video streams were very useful for learning; each step explained”, “ I can see the professor’s reasoning process as he explains the problem”, “ The videos served as backup or an intermediate help session”, “ They helped me with the homework”, Student Evaluations: Sample Questionnaire Results
  11. 13. Student Evaluations (continued) “ Being able to replay the videos is helpful”, “ They are good for reviewing for tests”, “ The videos gave a detailed explanation of how to do a problem”.
  12. 14. <ul><li>Keep the videostreams short. </li></ul><ul><li>Students want results: don’t want to search through lots of material. </li></ul><ul><li>Want easy as well as hard problems; this serves different background skills. </li></ul><ul><li>Students can work at their own pace. </li></ul><ul><li>Gave same final as 1996, 4 point improvement in the average (71 to 75) across 160 students. </li></ul>Results and Observations
  13. 15. Fall 2004 Results Number of hits: 10,028 Average Number of Hits/Grade Category A(15) 118.7 B(25) 92.4 C(30) 113.9 D(10) 96.4 F(8) 56.6 W(22) n/a
  14. 16. Sample Usage for Dec. 16 Final Page Name Time of Access 100 topic 13: modeling & control--(6:28 min) December 16, 2004 5:46am 100 topic 13: modeling & control--Block Diagram Reduction December 16, 2004 5:22am 100 topic 13: modeling & control--(6:28 min) December 16, 2004 5:09am 100 topic 13: modeling & control--(6:28 min) December 16, 2004 4:00am 02PastExams, Exam 04 pdf December 16, 2004 3:41am 100 topic 13: modeling & control-- DC Motor Equation December 16, 2004 3:40am 100 topic 13: modeling & control--(6:28 min) December 16, 2004 2:46am 100 topic 13: modeling & control-- DC Motor Equation December 16, 2004 2:27am Topic 13 pdf (Modeling & Control) December 16, 2004 2:27am Topic 15 pdf (Systems Described By Difference Equations) December 15, 2004 6:59pm 05PastExams, exam 01--7. Problem 12 December 15, 2004 6:22pm 05PastExams, exam 01--10. Problem 10 December 15, 2004 6:06pm 05PastExams, exam 01--8a. Problem 08 December 15, 2004 5:54pm 05PastExams, exam 01--5. Problem 05 December 15, 2004 5:38pm 05PastExams, exam 01--4. Problem 04 December 15, 2004 5:29pm 05PastExams, exam 01--3. Problem 03 December 15, 2004 5:07pm 05PastExams, exam 01--1. Problem 01 December 15, 2004 4:27pm
  15. 17. Fall 2004 Final Exam Usage Date of Final: Dec. 16, 8a.m. – 11a.m. Last Access < 12/15, 5pm 5pm-1am 1am-7:59am none A(15) 4 7 1 3 B(23) 0 13 1 9 C(30) 3 12 8 7 D(10) 0 4 4 2 F(8) 0 1 1 6
  16. 18. <ul><li>Cover more topics. </li></ul><ul><li>Need improvements in cross-referencing material. </li></ul><ul><li>Include more applications. </li></ul><ul><li>Improve Assessment </li></ul>Future Work
  17. 19. Acknowledgments <ul><li>Financial Support provided by the Vice Provost’s Office at Rensselear. </li></ul><ul><li>Technical Support provided by the Anderson Center for Innovation in Undergraduate Education. </li></ul>     

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