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Air transportation now operational [message #2447] Thu, 23 April 2009 13:55 Go to next message
Stefan Edlund is currently offline Stefan Edlund
Messages: 127
Registered: July 2009
Location: IBM
Senior Member
Hi all,

as of the latest build (0.5.0.I20090423 from
http://www.eclipse.org/stem/downloads.php, thanks Yossi), air
transportation is now working for the US model. More details on how air
transportation is modeled will be described in detail on the STEM wiki in
the near future. To summarize the method used here, a region that has one
ore more airports is connected using a Pipe Transportation Edge to a node
in the sky called an Air Transportation System. The pipe transportation
edge moves people up and down using actual data we collected from FAA data
sources on primary and non-primary US airports. For instance, California
counties having primary and non-primary airports are connected to a
California air transportation system. The population of this air
transportation system is the total number of passengers expected to travel
by air for a given time period (e.g. daily).

A state air transportation system is connected to a US air transportation
system using pipe transportation edges with a capacity representing the
total number of expected passengers expected to fly from the state to any
other US state (i.e. "inter-state" travelers versus "intra-state"
travelers). This number can be deduced from statistical analysis of US air
transportation data.

Within an air transportation system, the disease model is free to operate
using the same dynamics as for any other region node modeling the contacts
between people in airports and on airplanes.

To try it out, build a model for US level 2 (counties) and drag the "Air
transportation between USA Counties (2) and USA States (1)" into the
model. Also drag "Air transportation between USA States (1) and USA (0)"
into your model. You can view the air transportation edges from the Map
view under the Edges dropdown.

Thanks!
Re: Air transportation now operational [message #2477 is a reply to message #2447] Fri, 24 April 2009 17:34 Go to previous messageGo to next message
Werner Keil is currently offline Werner Keil
Messages: 1081
Registered: July 2009
Senior Member
Probably just in time.

Anything about this new Mexican Pig Flu ?!

Although it may not only travel via Air transportation between Mexico and
the USA...
Re: Air transportation now operational [message #2507 is a reply to message #2477] Sat, 25 April 2009 05:39 Go to previous messageGo to next message
Stefan Edlund is currently offline Stefan Edlund
Messages: 127
Registered: July 2009
Location: IBM
Senior Member
Right, currently we don't have any data on Mexican air transportation. But
that's exactly why STEM is an open source project. The more data we can
get, the more accurate models we can build. Cheers!
Re: Air transportation now operational [message #2536 is a reply to message #2507] Sun, 26 April 2009 04:46 Go to previous messageGo to next message
Werner Keil is currently offline Werner Keil
Messages: 1081
Registered: July 2009
Senior Member
Do you think Mexican authorities may be a little more helpful under the
impression of this threat ?!
(sure, there could be some flights even they don't know or rather not want
the world to be aware of ?;-)

After all, California itself has seen a few cases already according to the
news. So in that case, Almaden, San Francisco or the Silicon Valley may be a
little further away, than let's say LA (!!) but still rather close.

I hope, JavaOne attracting Ten Thousands of people won't be canceled for
such a reason, but at least in Mexico City events of that size have now been
banned until further notice...
Re: Air transportation now operational [message #2564 is a reply to message #2447] Sun, 26 April 2009 04:54 Go to previous messageGo to next message
Werner Keil is currently offline Werner Keil
Messages: 1081
Registered: July 2009
Senior Member
Since Malaria also is "airborne" in a way, are there models for that, too?

I know, a lot of charities and celebrities, as well as politicians already
care for that (e.g. here: http://www.imdb.com/news/ns0000002/#ni0760137,
Gordon Brown in London also just met a group of activists donating Millions
for Mosquito nets and other measures) so I just wanted to know, whether this
is also a corrent topic for STEM or only diseases spread directly between
humans? (like Flu)
Re: Air transportation now operational [message #2708 is a reply to message #2564] Tue, 28 April 2009 14:58 Go to previous message
Stefan Edlund is currently offline Stefan Edlund
Messages: 127
Registered: July 2009
Location: IBM
Senior Member
Hi the plan is to support so called vector borne diseases the future,
which also includes other mosquito carried diseases such as Dengue fever.
Such models are more complex since they depend on accurate mosquito data
which depend on rain fall and other things.
Re: Air transportation now operational [message #560860 is a reply to message #2447] Fri, 24 April 2009 17:34 Go to previous message
Werner Keil is currently offline Werner Keil
Messages: 1081
Registered: July 2009
Senior Member
Probably just in time.

Anything about this new Mexican Pig Flu ?!

Although it may not only travel via Air transportation between Mexico and
the USA...
Re: Air transportation now operational [message #560872 is a reply to message #2477] Sat, 25 April 2009 05:39 Go to previous message
Stefan Edlund is currently offline Stefan Edlund
Messages: 127
Registered: July 2009
Location: IBM
Senior Member
Right, currently we don't have any data on Mexican air transportation. But
that's exactly why STEM is an open source project. The more data we can
get, the more accurate models we can build. Cheers!
Re: Air transportation now operational [message #560883 is a reply to message #2507] Sun, 26 April 2009 04:46 Go to previous message
Werner Keil is currently offline Werner Keil
Messages: 1081
Registered: July 2009
Senior Member
Do you think Mexican authorities may be a little more helpful under the
impression of this threat ?!
(sure, there could be some flights even they don't know or rather not want
the world to be aware of ?;-)

After all, California itself has seen a few cases already according to the
news. So in that case, Almaden, San Francisco or the Silicon Valley may be a
little further away, than let's say LA (!!) but still rather close.

I hope, JavaOne attracting Ten Thousands of people won't be canceled for
such a reason, but at least in Mexico City events of that size have now been
banned until further notice...
Re: Air transportation now operational [message #560895 is a reply to message #2447] Sun, 26 April 2009 04:54 Go to previous message
Werner Keil is currently offline Werner Keil
Messages: 1081
Registered: July 2009
Senior Member
Since Malaria also is "airborne" in a way, are there models for that, too?

I know, a lot of charities and celebrities, as well as politicians already
care for that (e.g. here: http://www.imdb.com/news/ns0000002/#ni0760137,
Gordon Brown in London also just met a group of activists donating Millions
for Mosquito nets and other measures) so I just wanted to know, whether this
is also a corrent topic for STEM or only diseases spread directly between
humans? (like Flu)
Re: Air transportation now operational [message #560957 is a reply to message #2564] Tue, 28 April 2009 14:58 Go to previous message
Stefan Edlund is currently offline Stefan Edlund
Messages: 127
Registered: July 2009
Location: IBM
Senior Member
Hi the plan is to support so called vector borne diseases the future,
which also includes other mosquito carried diseases such as Dengue fever.
Such models are more complex since they depend on accurate mosquito data
which depend on rain fall and other things.
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