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Lectures On Demand: delivering traditional lectures over the web

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The document discusses using video lectures for teaching. It describes the Lectures On Demand (LODE) system developed by the author for recording, streaming, and accessing video lectures. A study was conducted comparing the LODE system, which allows viewing full recorded lectures, to the Needle system, which allows searching and extracting information from lectures. The results showed that students who used the full LODE lectures performed better on questions requiring a complete understanding, while the Needle system allowed faster answering of definition-type questions.

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Lectures On DEmand: delivering traditional lectures over the Web. Marco Ronchetti Dip. Ingegneria e Scienza dell'Informazione Universit à di Trento Italy
Lecture available on slidedshare ,[object Object],[object Object],[object Object]
Video streaming ,[object Object],[object Object]
Bandwith ,[object Object],[object Object],[object Object]
We can watch TV on the Internet ,[object Object]
Coming from two perspectives… ,[object Object],[object Object],[object Object],[object Object],Technology driven Goal driven
What a great idea! … really?
Teaching with videos? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Teaching with videos? ,[object Object],[object Object]
Let's not be so pessimistic… What can we say from an e-learning perspective?
What do we use e-learning for? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Where can videos help? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Traditional and remote students: how? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Traditional and remote students: how? ,[object Object],[object Object],[object Object],[object Object]
Breaking the space-temporal unit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Teaching with videos? ,[object Object],[object Object],[object Object],[object Object],[object Object]
But we just said videos are no good… ,[object Object]
Our experience
We started in late 2003 ,[object Object],[object Object],[object Object],[object Object],[object Object]
e-presence today ,[object Object],http://sourceforge.net/project/showfiles.php?group_id=159579
What was different? ,[object Object],[object Object],[object Object],[object Object]
Cognitive interface ,[object Object],[object Object],[object Object],[object Object]
Logical Architecture Synchronous ( webcast ) Asynchronous ( On line , or download - podcast ) Asynchronous( CD - DVD )
Our experience ,[object Object]
In our case (2004 data) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Student feedback ,[object Object],[object Object],75% anticipated using the system often or very often 5% 63% total 2 nd exam (23 stud.) 1 st exam (45 stud.) students who… 4% 6% … followed the course completely off-line 87% 51% … used the system to review at least one lecture
Advantages from student’s perspective ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Other advantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
We learned that: ,[object Object],[object Object],[object Object],[object Object]
Our requirements ,[object Object],[object Object],[object Object]
Our requirements ,[object Object],[object Object],[object Object],[object Object]
Our requirements ,[object Object],[object Object],[object Object],[object Object],[object Object]
Our requirements ,[object Object],[object Object],[object Object],[object Object]
Lode Supporto della didattica tradizionale
LODE: the user interface
Acquisition setup
Acquisition - User interface
System Architecture OnStage Web Server Video Streamer DVD Browser LODE acquisition
Portability (End user requirements) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The system ,[object Object],[object Object],[object Object],[object Object],[object Object]
New Flash version http://latemar.science.unitn.it/SSSW07/Gangemi-OntologyDesign/content/start.html
Lode - portability Supporto della didattica tradizionale Mac – Win - Linux Player MP4 (Video+audio,no slides)
Lode - portability Supporto della didattica tradizionale Symbian based phones (Nokia N70) Audio + slides +zoom
Is it really suitable for m-learning? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Is it really suitable for m-learning? ,[object Object],[object Object]
Extensions ,[object Object],[object Object],[object Object]
Use ,[object Object],[object Object],[object Object],[object Object]
Assessing costs: ,[object Object],[object Object]
Assessing costs: initial costs: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Assessing costs: running costs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Today: many other similar systems ,[object Object],[object Object],[object Object],[object Object]
Some examples: ,[object Object],[object Object],[object Object],[object Object],[object Object]
Browser independence…
Questions for you
Why do you need the video ? ,[object Object],[object Object],[object Object],[object Object]
Why do you need the slides ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
How important is format ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
How important is transportability ? ,[object Object],[object Object]
Do you need temporal markers ? ,[object Object],[object Object]
Do you want to users to be able to give feedback/interaction ? ,[object Object],[object Object],[object Object],[object Object]
Can you interfere with the teacher? ,[object Object],[object Object],[object Object]
When you'll have lots of stuff… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Be clear! ,[object Object],[object Object],[object Object]
Can we do more? ,[object Object],[object Object],[object Object]
Needle - search results
Needle - architecture ASR Multimodal search!
Needle - ASR ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Needle - Vocabulary Research system vocabulary contained 62,879 words Manual transcription contained 702 terms - 57 not present in vocabulary 36 were technical terms Rest was english or spanish words, company names, other minor stuff (re-…, diminutives). Language model is important! We took Java books (11,443 terms before stemming - added to the vocabulary and decreased the unrecognized words from 8% to 3%)
ASR - is it good? For information retrieval - yes. Rare false positive on interesting domain!
Questions ,[object Object],[object Object]
Scenario ,[object Object],[object Object],[object Object],[object Object]
Experiment ,[object Object],[object Object],[object Object]
Experiment ,[object Object],[object Object],[object Object],[object Object]
Pre-test results
Test results
Analysis ,[object Object],[object Object],[object Object]
Further investigations ,[object Object],[object Object],[object Object],[object Object]
Conclusion ,[object Object],[object Object],[object Object]

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Lectures On Demand: delivering traditional lectures over the web

  • 1. Lectures On DEmand: delivering traditional lectures over the Web. Marco Ronchetti Dip. Ingegneria e Scienza dell'Informazione Universit à di Trento Italy
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  • 7. What a great idea! … really?
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  • 10. Let's not be so pessimistic… What can we say from an e-learning perspective?
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  • 23. Logical Architecture Synchronous ( webcast ) Asynchronous ( On line , or download - podcast ) Asynchronous( CD - DVD )
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  • 34. Lode Supporto della didattica tradizionale
  • 35. LODE: the user interface
  • 37. Acquisition - User interface
  • 38. System Architecture OnStage Web Server Video Streamer DVD Browser LODE acquisition
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  • 41. New Flash version http://latemar.science.unitn.it/SSSW07/Gangemi-OntologyDesign/content/start.html
  • 42. Lode - portability Supporto della didattica tradizionale Mac – Win - Linux Player MP4 (Video+audio,no slides)
  • 43. Lode - portability Supporto della didattica tradizionale Symbian based phones (Nokia N70) Audio + slides +zoom
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  • 65. Needle - search results
  • 66. Needle - architecture ASR Multimodal search!
  • 67.
  • 68. Needle - Vocabulary Research system vocabulary contained 62,879 words Manual transcription contained 702 terms - 57 not present in vocabulary 36 were technical terms Rest was english or spanish words, company names, other minor stuff (re-…, diminutives). Language model is important! We took Java books (11,443 terms before stemming - added to the vocabulary and decreased the unrecognized words from 8% to 3%)
  • 69. ASR - is it good? For information retrieval - yes. Rare false positive on interesting domain!
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