webels: multimedia e-meeting system to support international cooperation for sustainable development
TRANSCRIPT
WebELS: Multimedia e-Meeting system to support international cooperation for
sustainable development
1National Institute of Informatics, Tokyo 101-8430 JAPAN 2The Graduate University for Advanced Studies, Tokyo 101-8430 JAPAN
e-mail: [email protected]
A.J. BERENA1, S.Chunwijitra1, M.Osamnia2, H.Okada1, H.Ueno1
What it takes to support international cooperation for sustainable development?
Money?
Time?
People?
Communication Channel?
Technology transfer?
How about in the case of Sahara Solar Breeder (SSB) Project?
Let’s look and see!
SSB Project’s Education and Training Program to uphold international cooperation
Researcher Exchange Program
Adapting WebELS for Distance Education
Annual Sustainable Energy Forum and Workshop
Role of WebELS in the SSB Project
To provide a communication channel between researchers in Japan and Algeria for technology transfer and to keep an active collaboration. Specifically, WebELS is to support: Self-Learning – where professors, lecturers and experts in the field of energy engineering can create course contents to be archived on the web for online self-learning to achieve knowledge transfer; and Distance Meeting – where stakeholders can hold Internet-based distance meeting domestically and internationally, instead of the conventional face-to-face meeting, thereby minimizing the cost incurred in the later.
WebELS in the first 3 Years of SSB Project
Case 1. Online Conference Distribution using WebELS V6 - Example: 1st AASEF in Nagoya in 2011 - with participants from adjacent room and remote campuses
WebELS in the first 3 Years of SSB Project
- presentations were created as self-learning contents after the conference
Course Authoring
WebELS in the first 3 Years of SSB Project
- presentations were created as self-learning contents after the conference
Learning contents are available for viewing on the WebELS SSB Server and other WebELS Servers.
WebELS in the first 3 Years of SSB Project
Problems Encountered on online conference distribution:
• remote users had a hard time determining the current presentation
• Remote users are informed by chat messaging of the change in presenter – but it is not a guaranteed method
WebELS in the first 3 Years of SSB Project
Case 2. Distance Meetings using WebELS V6 - used for domestic distance meeting in Japan - used for energy engineering lecture in Algeria - candidate researcher/trainee’s interview between Japan and Algeria
e-Meetings Trials using WebELS V6 since 2011:
Participants from UK, Algeria, Japan Participants from USTO, Algeria and NII, Japan
WebELS in the first 3 Years of SSB Project
Problems Encountered in the e-Meeting: • Influence of unstable and low speed bandwidth
USTO, ALGERIA
NII, TOKYO, JAPAN
U K
Downstream is very slow.
WebELS Server
USTO, ALGERIA
NII, TOKYO, JAPAN
U K
Downstream is very slow.
WebELS Server
Participants: Khiat (USTO, DZ), Matsuura (Home, UK, 8Mbps), Sila (NII, JP), John (NII, JP)
Network Scenario
WebELS in the first 3 Years of SSB Project
Problems Encountered in the e-Meeting: • Influence of unstable and low speed bandwidth
Results on the e-Meeting Trial conducted on October 13, 2011 Participants: Khiat (USTO, DZ), Matsuura (Home, UK, 8Mbps), Sila (NII, JP), John (NII, JP)
At the start of the meeting at 8:30 CET (16:30 JST), video streaming was clear and smooth in both ways.
Few minutes later at NII, reception of Ms Khiat video and audio was still smooth and clear. But at USTO, video from UK and NII were frozen and audio was delayed for about 5-10 seconds.
Chat messages received by Ms Khiat have delay about 5-10 seconds.
WebELS in the first 3 Years of SSB Project
Problems Encountered in the e-Meeting: • Influence of unstable and low speed bandwidth
Video Meeting Very Good
Video Meeting Unavailable
T ime of Day
7:00 7:30 8:00 8:30 9:00 9:30 10:00 AM Algeria Standard Time
3:00 3:30 4:00 4:30 5:00 5:30 6:00 PM Japan Standard Time (JST)
T ime of Day
7:00 7:30 8:00 8:30 9:00 9:30 10:00 AM Algeria Standard Time
3:00 3:30 4:00 4:30 5:00 5:30 6:00 PM Japan Standard Time (JST)
USTO Network Traffic
?
?
?
WebELS in the first 3 Years of SSB Project
Problems Encountered in the e-Meeting: • Influence of unstable and low speed bandwidth
Traffic
Audio/Video Required BW Traffic
Audio/Video Required BWTraffic
Low Traffic Medium Traffic High Traffic
Available BW
Line Speed
Traffic
Audio/Video Required BW Traffic
Audio/Video Required BWTraffic
Low Traffic Medium Traffic High Traffic
Available BW
Line Speed
Effect of Network Traffic on Delivery of Video Data
Δt1 Δt1 Δt2
Audio/video data incurred longer delay due to buffering at network devices
Traffic
Audio/Video Required BW Traffic
Audio/Video Required BWTraffic
Low Traffic Medium Traffic High Traffic
Available BW
Line Speed
Traffic
Audio/Video Required BW Traffic
Audio/Video Required BWTraffic
Low Traffic Medium Traffic High Traffic
Available BW
Line Speed
Where: Δt1 = length of time to deliver the video data with sufficient available bandwidth Δt2 = length of time to deliver the video data with insufficient available bandwidth line speed = allocated bandwidth for the link; in aggregate links, it could be the bottleneck link. traffic = network traffic by other users Audio/Video Required BW = the minimum bandwidth required to deliver the video data without buffering.
WebELS Meeting Ver. 7 – Released September 2013
Required Server Components
Linux OS (CentOS)
Apache Tomcat
Red5
Java JDK
MySQL
LibreOffice, etc
Required Client Components
Software:
OS (Windows, Mac OS, Linux)
Browser (IE, Chrome, Firefox)
Adobe Flash Player Plugin
Hardware:
Web Camera
Microphone
System Infrastructure
Notable Improvements on WebELS Ver.7
User Interface – video meeting and slide presentation in one panel
Notable Improvements on WebELS Ver.7
User Roles – admin, presenter and chairman functions
Synchronization by remote shared object technique.
Presenter’s Functions
Select Presenter
Text Mode
Cursor Mode Zoom & Move
Annotation Content Management On-the-fly
Slide Navigator ( Mouse Click or Arrow Key )
Chairman’s Function
Sort content by last update
Sort content by title
Select and Change content
Select Chairman
Notable Improvements on WebELS Ver.7
Optimized video stream data – low, medium and high quality
At normal quality, at least 100kbps bandwidth is required for 4 users with web camera and microphone turned-on.
Notable Improvements on WebELS Ver.7
Slide Prediction Technique – to minimize slide synchronization delay
With slide prediction, the next slide is downloaded onto the local machine before slide changing, thus download delay is reduced.
Notable Improvements on WebELS Ver.7
Multimedia support – text, image, vector graphics, video
Multimedia Slide Presentation Video Conferencing
Video
WebELS Meeting Ver. 7 Practical Usage
Online Conference Distribution
Meeting Server Conference Presentation
User2
(Chairman)
Individual Listener
User4
User1
(Presenter)
Group Listeners
User5
User3
(Admin)
Internet
E-Meeting Between NII and USTO
» Video Meeting before 9:00 AM at USTO is working well, but deteriorates after this time and becomes unavailable.
» Recommended to install a special line (ADSL) for e-Meeting purposes using WebELS.
» Hopefully, this ADSL will be available within our visit here in Oran.
Conclusion
» The improvements on the WebELS Meeting System Ver7 provides:
» Easier management of online meeting » Easier management of online conference
distribution » Video meeting usage in a least 100kbps Internet
bandwidth for 4 users with camera and microphone turned on
» Minimized slide changing delay in low-speed Internet environment
Future Work
» Automatic Meeting Recording Function • A function to allow the presenter/admin to record
the online meeting and be able to export this content and be imported onto the learning module. This proposal can solve the lack of online learning materials.
» Mobile Support • Migrate the system to allow usage in mobile
devices such as tablets and smart phones.
Screen Shots
Meeting Panel Layout
Presentation (Available in full-screen)
Wide Video (Available in full-screen)