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"The
Lost City expedition was the first in which a principal scientist
participated entirely through telepresence – marking a new
era in undersea exploration."
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Feature
Story
Internet2
Technology Revolutionizes Oceanographic Research
Celine
Rice
Ocean State Higher Education Economic Development and Administrative
Network
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On a rainy afternoon on
the University of Rhode Island’s Narragansett
Bay campus, several dozen ocean exploration enthusiasts – guests
of Dr. Robert Ballard’s Immersion Presents program – watched,
rapt, as the world-renowned explorer spoke with them via Internet2
videoconferencing from aboard the NOAA research vessel Ronald H. Brown.
Misty undersea images of the Lost City, a series of hydrothermal vents
in the mid-Atlantic, flooded the large screen at the front of an amphitheater
in the University’s Coastal Institute. The
images, beamed back to URI in real time from Ballard’s robotic
explorers Argus and Hercules, were simultaneously sent from URI to
24 other sites nationwide – including the University of Washington
laboratories of Dr. Deborah Kelley, who discovered the Lost City
in 2000. The time required to send the images from 2,100 feet below
the
surface to Kelley and her colleagues, 4,500 miles away in Seattle:
1.5 seconds. Elsewhere
on the Bay Campus, in Ballard’s Inner Space Center,
banks of monitors were illuminated with similar images as a 6-person
crew worked continuously to integrate and edit various feeds from the
Brown – creating seamless transmission to the Immersion Presents
sessions and to scientists at three research universities, and
streaming to the Internet for worldwide viewing. Down the hall, a group
of URI
scientists gathered around a command center similar to the one
that accommodated Kelley and her team at the University of Washington,
as
well as colleagues at the University of New Hampshire. The
Lost City expedition was the first in which a principal scientist
participated entirely through telepresence – marking a new era
in undersea exploration and possibly revolutionizing scientific inquiry,
said Ballard. “We are able to marshal the intellect of America – involving
200 Deborah Kelleys in a mission without asking them to leave their
classrooms and laboratories for several weeks and go to sea.” He
added that, should a new undersea life form be discovered, for
instance, an expert biologist can be summoned at the touch of a cell
phone. The
Lost City expedition was launched by the Institute for Exploration
in Mystic, CT, which also worked with the Institute for Archaological
Oceanography at the University of Rhode Island’s Graduate School
of Oceanography. URI worked in partnership with the Ocean State Higher
Education, Economic Development, and Administrative Network (OSHEAN) – a
not-for-profit consortium of universities, hospitals, and government
agencies that brings Internet2 access to members throughout Rhode Island
and southeastern Massachusetts – to make the historic mission
possible. Using the infrastructure and video resources that OSHEAN
members have put in place over the past five years, the mission
was streamed via multicast to sites across the United States.
For more information about the University of Rhode Island, visit
www.uri.edu. For
more information about the Institute for Exploration and Dr. Ballard’s
undersea discovery initiatives, visit www.ife.org.
For more information about OSHEAN, visit www.oshean.org
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Members
of the Chinese Academy of Science sang a Chinese
folks song, "Jasmine Flower", at this year's Megaconference.

Robert
Dixon and Jennifer Oxenford will be accepting an
inaugural IDEA Award for "The Megaconferences and
their Spinoffs" at the Spring Member Meeting.
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What's Happening
Megaconference VII Highlights
Bob
Dixon, Chief Research Engineer, OARNet and Ohio State
University
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Megaconference VII was held on Dec 1, 2005. See http://www.megaconference.org
for details. The conference continues the trend of growing bigger every
year.
- There were 432 registrants. Estimated audience of 1000 people.
- 22 MCUs
- 40 countries, 6 continents
- 42 states of the USA
- 3 streaming video sites (Finland, Slovenia and USA)
- 1 cable TV location (University of Wisconsin at Lacrosse;
campus and 11 cities)
- 15 1/2 hours
- 28 wonderful presentations
- 3 Cafes
- 3 Roll Calls
- 3 Megachoirs, led by maestro Tim Poe
- 6 Technology Showcases for the Prize Donors
- 15 Door Prizes
- 3 parallel chat sessions running, Audience, Presenters and
Technical.
Some Firsts this year:
- 3G/H.324 live video from a cell phone (from London)
- Many new countries for the first time. China, India, Fiji,
Indonesia, Philippines,
- Niger, Nigeria, Uruguay, Costa Rica, Colombia, Estonia,
Panama Access Grid connection
- Seeing the Stars thru a Telescope (from Australia)
Many wonderful messages have been received; here is one that
gets to the heart of the theme Increasing Empathy through Vide
Conferencing:
"Thank
you very much for your excellent and extremely diligent work
to organize
megaconference VII. It was a really huge success
which left me with a nice memory.
And I also
want to express my gratitude for giving us a special
opportunity to sing a song.
We all
treasured this chance, so we sung this song with deepest
love to
the megaconference and the world. Such a feeling
came from our heart. We used three minutes to show our warm
welcome to you and all the new friends we met in this conference.
Thank you again for allowing us to sing a whole song.
The song we sung on the morning of Dec. 2 was a Chinese folk
song, called "Jasmine flower".
You praised
us by waving your hand and my students were deeply moved.
We were all excited for a long time. We all love you and
the megaconference you originated.
This was
our first time to participate in the megaconference, and
also the first time for all institutes in the Chinese Academy
of
Science. It was a great experience for us to join this kind
of activity.
Videoconferencing
is an effective way of communication. It opened a window
for us, by which we can see how people in other
countries work and live. And at the same time a real China
has been shown to the world. I believe that more people will
comprehend the meaning of the videoconference by attending
it personally. We will want to participate in the next megaconference.
I hope
we will have more academic and cultural exchanges by using
VC
with the universities in the USA.
Best regards
Yafen Jin
Manager of the Network Center of the Academy of Mathematics and Systems Science.
Chinese Academy of Science."
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Students as remote as Crete, Jerusalem, and Hawaii attended the Site Coordinator
training via videoconferencing. |
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Site
Reports
University of Pittsburgh's International Business Center
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The International Business Center in the University of Pittsburgh's
Joseph M. Katz Graduate School of Business organized a real-time,
multi-point videoconference with Michael S. Dell, founder and chairman
of the Board
of Directors of Dell computers on 12 April. Dell addressed Master
of Business Administration students from his office in Austin, Texas
via
videoconference. Seventeen other institutions with Centers for
International Business Education and Research (CIBER) were able to
take part in the
conference through Internet2's advanced high performance network
which connects all of the participant Internet2 member universities.
The
Internet2 Commons H.323 Videoconferencing Service provided the
technology for this multi-site event.
The event began
with Dell sharing his experience of and insights
into international business. After his remarks, Dell fielded
questions from Pitt students, as well as students interacting
live via videoconference
from Duke University, Georgia Institute of Technology, Indiana
University, Michigan State University, Ohio State University,
Purdue University,
Temple University, Thunderbird-The American Graduate School
of International Management, and the universities of Colorado
at Denver, Connecticut,
Hawaii at Manoa, Kansas, Memphis, Michigan, South Carolina,
and
Washington. For more information, see http://ibc.katz.pitt.edu/PastEvents/Dell.htm.
If
you are interested in submitting a site report, please send
an email to commons-info@internet2.edu.
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260
people registered across four "virtual" site coordinator traning classes,
including the University of Kalmar's coordinator in Sweden.
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Tip
of the Quarter
"Virtual"
Site Coordinator Training
Megan
Troyer and Bob Dixon
Ohio State University |
In the last six
months, the Internet2 Commons Operations group trialed a new way
of training new Site Coordinators. Since most of the people
looking to gain the designation of Site Coordinator already have
some experience with H.323 Videoconferencing, we began offering the
training
by videoconferencing. This offering has been overwhelmingly popular
and we have had 260 registrants for training between the four
classes taught in July, August, and November of 2005 and January
of 2006. As
always, all who take our course are invited to join the ranks
of the Official Certified Site Coordinator. To see who all 291 individuals
who have taken that additional step, please see: http://commons.internet2.edu/sitecoordinators.html
In addition to
our standard H.323 training for administers, the Internet2
Commons was asked by the World Bank’s Global Distance
Learning Network to prepare a more basic H.323 class for their
centers in Africa. On February 2, 2006, we delivered a 3-hour
course in the
basics. This was a customized version of the four-hour course
we have been teaching regularly to other parts of the world—mainly
North America and Europe.
The audience was
very serious, of varying knowledge levels and backgrounds (managers
and technicians),
and asked many questions.
The
course went very well, and was much appreciated. We ourselves
learned many things from their questions, and feel both discouraged
and inspired.
We are discouraged because they have such serious technical
and political problems. Inspired because we believe we can
help them with at least
their technical problems, through continuing contacts and
free consulting services.
Megan Troyer designed
and taught the course, Gabe Moulton provided technical support
in the background,
and Robert Dixon
helped
answer questions and added additional perspectives.
For
more information about the phone bridge, please send an email
to commons-techsupport@internet2.edu
Do you have
a tip to share? Email your tip to commons-info@internet2.edu. |
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An updated ITU Recommendation
H.239 was approved by ITU Study Group 16 in September, 2005.
Usage
Statistics
September
1 - March 31
| Conferences |
380 |
| Connect Hours |
934 |
| Sites Connected |
2,571 |
| Port Hours |
8,402 |
| Training
Classes |
2 |
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Technology
View
Sharing a Little Bit about H.239
Mary
Trauner, Video Development Initiative
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Those who have
used collaborative technologies for some time know that the T.120
standard was developed to support application
sharing and data collaboration. Being written and implemented
initially for H.320 (ISDN) video conferencing appliances, many
implementations of T.120 (particularly for desktop conferencing)
were not very
scalable.
Bandwidth for the data stream was also very limited and therefore
only small screen changes resulted in any sense of smooth collaboration.
Some more current H.323 solutions began to provide T.120 functionality
in the MCUs, but by that time we noticed a plethora of web solutions
all claiming promises of “the best ever” – with price
tags to match and proprietary architectures posing road blocks
to interoperability across institutions choosing different products.
So again the customer
base looked toward standards to save the day.
In mid 2003,
ITU Recommendation H.239 arrived on the scene, followed by an Implementor’s
Guide in January, 2004. An updated ITU Recommendation H.239
was approved by ITU Study Group 16 in
September, 2005.
So
what is H.239 and how does it solve your collaboration problem?
Well, it
depends on what your
definition of collaboration
entails.
First, the H.239 Recommendation defines the procedure for
using multiple video channels in H.320 and H.245 signaling
based (aka H.310, H.323
and H.324) systems and for labeling the individual channels
with a “role”.
The purpose of the role is to indicate the requirements
for processing the channel and channel content in the call.
The procedures
defined
include control, indications, and capability exchange mechanisms.
Note:
While Recommendation H.239 covers both H.320 and H.245
signaling based systems, this article will only cover H.245
aspects since we are, after all, an Internet based service.
In
a nutshell, while the H.245 Recommendation provides for multiple
video channels, it does not define a one-way
transmission method nor
ways to label the channel content. H.245 also does not
describe
how to control presentation video in a multipoint conference.
H.239 has
stepped in to handle this by separating the idea of transport
channels from what it calls “roles”. Roles have
a “role
label” which
indicates the purpose of the stream as well as how the
stream should be presented at the end-user system and
how it should be processed
by an MCU. (In general, this role label can be assigned
to any audio,
video, or data channel when it is useful to establish
policies for presentation, management, and distribution.)
The H.239
Recommendation currently defines two roles:
It should be noted that the Live channel
supplements
the Presentation channel, meaning it carries a stream
less important to the
meeting. The Live stream is two-way. The Presentation
stream is one-way.
User end-points and MCUs begin by exchanging their
capabilities. That is, they let each other know if
they are H.239 capable
or not. Two levels of capabilities are defined for
a device:
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One or more capabilities for the traditional
video channel (that is, the main video channel.)
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One or
more capabilities for the second video channel, one or more
capabilities for the main video channel
while the second video channel is open.
A noted example
is, due to the extra computational requirements of handling
two video streams simultaneously,
the main
video channel is less capable than the traditional
video channel when the second
video channel is open. Devices that are H.239 capable
follow the protocol defined in the Recommendation
for this negotiation.
So now we have
a second one-way video window that is very useful for displaying
desktops, streaming
media, and so forth. H.239
continues to define the protocol with control
and indication
messages. These
messages manage “tokens” for the Presentation
role and permit devices to request the release
of video flow control
(thereby enabling the operation of additional
media channels or increasing the
bit rate on a channel.)
The Presentation role
is token-controlled and there is only one token
per conference. End-user devices
can request the token and, when
received, the device opens the channel, indicates
that video
is active, and starts sending the stream. When
the presentation
is over, the end-user
device stops sending the stream, inactivates
the
channel, and optionally closes the channel. The
token is then
released. In a multipoint
conference,
the MCU distributes the video to all H.239 capable
devices in the conference and, in addition, manages
the token during the conference.
While the H.239
Recommendation is fairly straightforward (for H.245-based systems
anyway), due to space
constraints this explanation has been very
brief. We welcome
you to post follow
up comments and
clarifications to commons-info@internet2.edu.
And of course, you can download the standard
yourself from http://www.itu.int/search/searchredirect.asp?recommendation.asp?type=items&lang=E&parent=T-REC-H.239-200509-I
ITU allows three free document downloads per
year.
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