Synchronous Interactive Teleteaching

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Nov 5, 2013 (3 years and 8 months ago)

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1

TELEPOLY

A High Quality Broadband Multimedia
Transmission System for
Synchronous Interactive Teleteaching

Dr. H. Hänni, P. Kunz

Network for Educational Technology (NET)

Dr. Th. Walter

Computer Engineering and Networks Laboratory (
TIK)

Swiss Federal Institute of Technology, Zurich



2

Content


Introduction


The TELEPOLY System of
ETHZ and EPFL


Using the TELEPOLY
System


Some further info...

H. Hänni

Th. Walter


P. Kunz (live from ETHZ)


H. Hänni






3

Introduction


Dr. H. Hänni, Network for Educational Technology
(NET)

haenni@diz.ethz.ch

http://www.net.ethz.ch

Swiss Federal Institute of Technology, Zurich



4

ICT in T&L: Status and Tendencies


New possibilities increasingly known/recognized


Course
-
related information is put onto the WWW


See: ArgusClearinghouse, Yahoo, World Lecture Hall
etc.


Virtual classrooms and universities appear


NDIT/FPIT, ETH World, Univ. of Berkeley Extension
etc.


Networks of virtual universities are set up


Virtuelle Hochschule Baden
-
Württemberg (D)


Western Governors University (USA)


Virtual Campus Switzerland


5

Status and Tendencies (2)


Important conferences:


Syllabus Annual Conference (California, USA, July)


Educause Annual Conference (USA, Oct./Nov.)


LearnTec (Karlsruhe, D, Feb.)


-
> Coherent picture at Syllabus ‘99:


Communication medium/technology of the (near) future
is
the Web:



Web Course Authoring/Management Systems



Web technology

on
-

and off
-
line



Streaming technology

for audio/video

6

Status and Tendencies (3)


Asynchronous communication and Web
-
based T&L
environments dominate


But:
Learning is a social process!

Sometimes people want to communicate “live”


Therefore:


We need high quality synchronous communication
systems

as well!

7

Our Persuasion

The
ideal virtual T&L environment
...


is a
hybrid

of

teacher centered (teacher
-
driven)
and


learner centered (learner
-
driven) components


consists of networked (Web
-
based), multimedia,
asynchronous
and

synchronous components



TELEPOLY

and its successor
Easy Teach & Learn

are leading solutions for the synchronous part of the
virtual T&L system

8

The TELEPOLY System

of ETHZ and EPFL


Dr. Th. Walter

Computer Engineering and Networks Laboratory (TIK)

walter@tik.ee.ethz.ch

http://www.tik.ee.ethz.ch



9

History


TELEPOLY became operational in January 1996
with two partners:
EPF Lausanne

and
ETH Zürich


Late 1996, the Swiss Centre for Scientific
Computing
(CSCS) Manno

joined Telepoly


Since October 1998,
University of Basel

is
actively participating in TELEPOLY

10

Technical Approach


Use of
advanced technology

for audio and video
processing.


ATM

(Asynchronous Transfer Mode) network for
high data rates and low delays with guaranteed
quality
-
of
-
service
.


Application or
screen sharing

tools for electronic
teaching aids in a distributed environment.


Use of
off
-
the
-
shelf

products.

screen for

remote

classroom

screen for slides,

documents

screen for slides,

documents

screen for

local

classroom



screen for

lecturer

local

local

classroom

lecturer

remote



remote

classroom

PC for

slides

PC for

slides

screen sharing

Teleteaching System TELEPOLY

document

camera

(visualizer)

classroom

camera

lecturer

camera

(auto
-
tracking)

classroom

camera

A

V

A

V

A

V

V

V

A: Audio

V: Video

cell stack

ATM switch

ATM
-
Network

155 Mbits/s

cell stack

ATM switch

A

V

V

V

microphone

microphone

microphone

12

Video Quality
0
100
200
300
400
500
600
Students
502
66
20
20
9
Professionals
122
14
4
0
0
TV-Quality
< TV-Quality
Picture quality
not important
Others
No statement
Survey: Technical Requirements

13

Audio Quality
0
100
200
300
400
Students
380
191
8
27
11
Professionals
80
59
1
0
0
CD
Phone
Not important
Others
No statement
Survey: Technical Requirements

14

Students
0
100
200
300
400
500
not imp.
6
30
5
26
less imp.
26
197
20
148
important
222
260
172
251
very imp.
357
121
406
189
no statem.
6
9
14
3
Audio Quality
Picture of Teacher
Picture of
Teaching Docs.
Interactivity
Survey: Technical Requirements

15

Using the TELEPOLY System:

Course in Pharmaceutical Chemistry
ETHZ and University of Basle


P. Kunz, NET

kunz@diz.ethz.ch

http://www.net.ethz.ch

Swiss Federal Institute of Technology, Zurich

ENZYME

Beispiel: HSV1
-

Thymidinkinase

ENZYME

ENZYME

als
targets

für eine therapeutische



Intervention

Biochemical
Pathways

18

Prof. Folkers,

Zürich

Prof. Ernst,

Basel

Course duration: 2 years

7. & 9.
semester
students
together

Problem:

The students of the different
semesters

do
not have the same knowledge base

Up to SS 1999:

Students of 2 different semesters in one

course

Situation

19

The pharmaceutical departements
of Basel and Zürich are
establishing a competence centre

Problem:

The students of the different
locations

do not have the same knowledge base

Situation

20

Offer

one

separate course for

each

semester

Problem 1:


1.

Lecturers cannot allocate more time for their
courses

Solution:

Cooperation of the two lecturers:


They produce one common course and share the
slides


Each of them teaches just one course

i.e. not more than before


Solution 1

21

Each course is held in just
one

location

Problem 2:


2.

How to share courses between Basel and Zürich?

Solution:

Use of the TELEPOLY system:


Live transmission of the lectures between Basel
and Zürich

Solution 2

22

4. year

7. semester


8. semester


Prof. Ernst,

Basel

Prof. Folkers,

Zürich

5. year

9. semester


10. semester


Prof. Ernst,

Basel

Prof. Folkers,

Zürich

WS 99/00

SS 00

WS 00/01

Open Learning

Environment

TELEPOLY transmission

Situation

Tele
-
Lecture

TELEPOLY

transmission

Tele
-
Lecture

TELEPOLY

transmission

Tele
-
Lecture

TELEPOLY

transmission

23

1 W

1 W

1 W

1 W

Tele
-
Seminars

TELEPOLY in an Open Learning Environment

Combination of
Tele
-
Lecture

&

Individual Work

3 W

3 W

3 W

Individual, goal oriented work with:

script, exercices, books, WWW

Tutorials

10. semester

Subject tests

24

Some Further Info...


Dr. H. Hänni, Network for Educational Technology
(NET)

http://www.net.ethz.ch

Swiss Federal Institute of Technology, Zurich



25

Initiatives at ETH Zurich


Network for Educational Technology (NET)


Founded in 1996, official Start: January 1st, 1997


Scans the scene and provides information, consulting,
support to instructors


Initiates and supports projects


ETH World


Planning started in 1999


Virtual (reality) extension of the physical campuses and
facilities of the ETH

26

NET Activities

Information/

Communication/

Events

Networking

Projects

Teachers’ support

Assessment

Innovation

http://www.net.ethz.ch

27

NET Events


Information blocks,
seminars
, workshops, demos


Introductory courses
for teaching staff


Live transmissions


Using
TELEPOLY
or ISDN
-
based Systems




NET annual meeting

at ETH


Next: Nov. 5, 1999, 9:15
-

17:00


Title: "Teach locally
-

learn globally”


See NET
-
Website:
www.net.ethz.ch


29

Telepoly Research Issues


Network support for dialogue
-
oriented, isochronous
services.


Technical equipment to be
utilised
, such as advanced
communication devices for ATM and workstations.


Synchronous and interactive teleteaching as a
didactic concept in support of higher education.

30

Telepoly Scenario

Data

Beamer

Audio

Video

Video

Audio

Video

Video

31

Telepoly Scenario

Data

Audio

Video

Video

Video

Audio

32

Media Processing

CODEC

CellStacks

Master

Slave

Slave

STM
-
1

155Mb/s

ATM

33

Multiparty Teleteaching

ATM Network

EPFL

CODEC

ETHZ

CODEC

34

Multiparty Teleteaching

ATM Network

EPFL

CODEC

ETHZ

CODEC

CODEC

CSCS

35

Application/Screen Sharing

ETHZ

EPFL/CSCS/

UNIBAS

TCP/IP

TCP/IP

INTERNET/ATM

36

Technical Criteria


Video of sufficient quality (TV quality);


Very good audio quality (close to CD quality);


Perfect audio and video synchronization;


Facilities for electronic presentations;


Reliability and stability throughout sessions.

37

Telepoly: Advanced Technology


Multi
-
directional, digital multimedia information
exchange over ATM (< 155 MBits/s) with guaranteed
quality of service:


TV
-
quality video

over several independent channels


Usually 3 channels


CD
-
quality audio


Very important! (See survey)


Good synchronization

between sound and image


Full interaction possibilities

for all participants

38

Telepoly: Do we need it?


Face
-
to
-
face meetings will remain important


Good mix of learner
-
centered and teacher
-
centered
methods required


Thus:

An effective Distance Education (DE) system must
consist of asynchronous and synchronous parts

39

Telepoly: Benefits


Synchronous sharing of T&L events


Special courses, colloquia, seminars etc.


Extends course programs


Saves resources including working and production time


Promising environment for DE


Courses, seminars etc. may in future be interactively
transmitted over TV
-
channels to any place


Bridging traditional and new T&L


Faculty teaching via Telepoly are encouraged to use
ICT
-
based teaching aids

40

Experiences: General


Technique works well!



>200 transmissions performed,


1 major transmission failure only (due to Swisscom)


Used for lectures, conferences, colloquia, exams,
sessions


Very suitable for teleteaching and teleconferencing!


Natural situation, unreached by any other system


Somewhat slower lecturing progress due to the
handling of the devices etc.

41

Experiences: Participants...


Are mostly positive (“Very good transmission” etc.)


Some cultural differences


Adapt quite quickly to the situation


Some cultural differences


Are not irritated by short/minor technical problems


Are very concentrated and motivated


Ask/answer questions (even in English!)


Want to have eye
-
contact with lecturer!

42

Didactical Requirements


Same as in traditional teaching...


Good presentation


Good time management


Enough animation


... plus proper use of the media


Media training required!


Especially important:


Encourage students to interact/ask questions


Introduce variety, avoid monotony


Enough breaks


43

Technical requirements: Survey


Questionnaires sent out to


To 540 people from industry
-
> 140 back


To 2300 students (6th to 8th semester)
-
> 628 back


Questions


Video Quality?


Audio Quality?


Value of Teleteaching

44

Professionals
0
20
40
60
80
not imp.
4
19
4
14
less imp.
40
52
10
40
important
57
49
56
55
very imp.
39
20
70
31
no statement
0
0
0
0
Audio quality
Picture of Teacher
Picture of
Teaching Docs.
Interactivity
Survey: Technical Requirements

45

0
50
100
150
200
250
300
350
Students
32
210
313
58
4
Professionals
2
30
93
15
0
not at all
a little
valuable
very val.
no statem.
Value of synchr. interact. Teleteaching

Survey: Technical Requirements

46

User Ratings


Video quality was good.

26%
45%
26%
0%
0%
3%
Fully agree
In general
yes
Half-half
In general no
Do not agree
No reply
47

User Ratings


Audio was good.

61%
36%
3%
0%
0%
0%
Fully agree
In general
yes
Half-half
In general no
Do not agree
No reply
48

User Ratings


Video and audio was lip
-
synchronized.

82%
18%
0%
0%
0%
0%
Fully agree
In general yes
Half-half
In general no
Do not agree
No reply
50

Learning Environments

Face to Face

ICT:

Individual Learning:


Mastery Learning


Self
-
Efficacy

Independence of


Time


Place

51

Learning Environments

Face to Face

Individual Learning:

ICT:

Open learning environment

Telepoly

lecture

Traditional lecture

52


Transmission Basel

㰽㸠嫼物捨


Quasiexperimental Fieldstudy:


normal course with final examination


long duration: 2 semesters


mixed, quite large sample

General Conditions

Problem:

Impacts on lecture must be
minimized

53

Normal
Lecture

with
digital Media

SS 99:

Zürich

Basel

Telepoly Lecture

WS 99/00:

Zürich


Basel

Basel


Zürich

Tutorials

Open Learning Environment:

Combination of

Telepoly Lecture

&

Individual Work

1 W

3 W

SS 00:

1 W

3 W

1 W

3 W

1 W

Questionnaires

Normal Lecture with

traditional Media

WS 98/99:

Zürich

Basel

Subject Tests

Semester: total 13
-
14 Weeks

54

1.

Acceptance

2. Learning effectiveness

3. Motivation

4.

Learning Strategies

Examined Variables