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<P><FONT face=Arial>Disclaimer;<BR><BR><STRONG>Multicast</STRONG> is a
technology not supported by most Commodity ISPs. It allows one source to send a
single stream which gets multiplied by routers and switches along to way and can
branch out to thousands of receive endpoints. This technology can be dangerous
on networks which are not well behaved, so most chose not to activate it. Those
who do use it, must have every piece of layer2 and layer3 hardware enabled for
multicast.<BR><BR><STRONG>Multicast</STRONG> is a feature supported by Internet2
and OneNet. OneNet does not send multicasts to our customers unless their IT
Network staff have asked us to do so. Since all of OneNet's backbone is
Multicast Enabled, it is an easy task for us to "turn it on" for any of our
customers. <BR><BR>Before you could view multicast from Internet2 such as the
one below, you would need to check with your local IT Network department to see
if Multicast is supported at your location. If your IT Network management
chooses not to activate multicast on their network, you should understand that
is their prerogative. Certain older switches and routers which may be on your
networks might not support Multicast.<BR><BR>All that disclaiming done, the
event below is just one of many interesting events being Multicast on Internet2.
Enjoy...<BR><BR>Bill Johnson<BR>Director of Network Operations -
OneNet<BR>Director - Netrad Infrastructure for CASA<BR>President - Oklahoma
Distance Learning Association<BR>405-225-9444<BR>cell 405-919=1718<BR>video
164.58.250.185<BR>-------------------------------------------------------------------------------------------------------<BR><BR>-----Original
Message-----<BR>From: Lauren B. Kallens [</FONT><A
href="mailto:lkallens@internet2.edu"><FONT
face=Arial>mailto:lkallens@internet2.edu</FONT></A><FONT face=Arial>]<BR>Sent:
Monday, July 25, 2005 11:01 AM<BR>To: i2-news@internet2.edu<BR>Subject:
[I2-NEWS] Live TV-Quality Video of Lost City Expedition Available Via Internet2
Multicast<BR><BR><BR>Live TV-Quality Video of Lost City Expedition Available Via
Internet2 Multicast<BR><BR>Live TV-quality video from a 10-day undersea
expedition to the hydrothermal vents field of Lost City will be multicast over
Internet2 networks beginning July 23rd through August 1st.<BR><BR>The multicast
address is 233.55.245.254 port 4000. Produced shows will take place each day at
10am, 12pm, 2pm and 4pm U.S. Eastern Time.<BR><BR>Video is being streamed from
the NOAA Research Vessel Ronald H. Brown.<BR>The ship departed Woods Hole,
Massachusetts on July 16 and traveled nearly 3000 miles to the dive site located
almost dead center in the Atlantic Ocean.<BR><BR>Dr. Bob Ballard, Dr. Dwight
Coleman, Todd Gregory and the rest of the Institute for Exploration expedition
team launched this mission to conduct round-the-clock explorations using IFE's
robotic vehicles (ROV) Argus and Hercules. The ROVs are supported by a
state-of-the-art shipboard control system that will send live high-definiton
video, audio and scientific data to a shore-based command center at the
University of Rhode Island, Graduate School of Oceanography. From there the
transmissions are sent via Internet2 networks and satellite downlink to various
scientific sites around the country, including the 18 Immersion Presents sites
participating in the "live" broadcasts.<BR><BR>Explorations at Lost City will
focus on 2 primary activities, collection of geologic and biologic data sets and
fluid samples, and to provide educational programming via Immersion Presents to
museums, aquariums and Boys and Girls Clubs nationwide.<BR><BR>Co-principal
investigator on the expedition is Dr. Deb Kelley of the University of
Washington. Dr. Kelley discovered the Lost City vents in December, 2000. These
vents are totally different from the so-called "black smoker" vents first
discovered by Dr. Ballard and others in 1977.<BR><BR>The chimneys in the Lost
City are much taller than black smoker chimneys and are made out of calcium
carbonate, the same mineral that forms stalactites and stalagmites in
above-ground limestone caves, not the metal-rich minerals of the black smokers.
The Lost City vents are on a flat-topped mountain on ocean crust that is more
than 1.5 million years old, instead of the much younger seafloor volcanoes that
normally host the black smoker systems. And, the tiny creatures at the Lost City
vents thrive in alkaline fluids that at 40-90°C are much cooler than the acidic
jets at up to 400°C emitted by black smokers.<BR><BR>More on the expedition to
Lost City can be found by visiting the following<BR>sites:<BR><BR></FONT><A
href="http://www.oceanexplorer.noaa.gov/explorations/05lostcity"><FONT
face=Arial>http://www.oceanexplorer.noaa.gov/explorations/05lostcity</FONT></A><BR><A
href="http://www.immersionpresents.org"><FONT
face=Arial>http://www.immersionpresents.org</FONT></A><BR><BR><BR><BR><BR><FONT
face=Arial>Contact:<BR>Lauren
Kallens<BR>Internet2<BR>lkallens@internet2.edu<BR><BR>I2-NEWS archives are
available at: </FONT><A href="https://mail.internet2.edu/wws/arc/i2-news"><FONT
face=Arial>https://mail.internet2.edu/wws/arc/i2-news</FONT></A><BR><BR><FONT
face=Arial>To unsubscribe from I2-NEWS, send an email to sympa@internet2.edu
with<BR>the subject: unsubscribe i2-news<BR><BR>or use the following link:
<</FONT><A
href="mailto:sympa@internet2.edu?subject=unsubscribe%20i2-news"><FONT
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