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Raj Mootanah
11-19-2001, 07:33 PM
Dear members,

I recently posted the query below and I would like to thank all those who replied.


If you are using the flock of birds motion analysis system in UK, we'd be
> glad to hear from you! We're looking forward to start some work on this
> system and we would like to talk to people with experience first.

Rajshree Mootanah
Research Fellow
Bioengineering Research Group - DaCS
Anglia Polytechnic University
Victoria Road South
Chelmsford
Essex
CM1 1LL
UK
Tel: (44) 1245 493131 ext 3316
Fax: (44) 1245 252646

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Dear Dr Mootanah,
I would be happy to chat. I've been using the device for about 10 years.
Anthony


Anthony MJ Bull BEng ACGI DIC PhD MIMechE CEng
ARC Lecturer, Department of Bioengineering,
Bagrit Centre,
Imperial College, London SW7 2BX,
United Kingdom.
tel: +44 20 7594 5186
fax: +44 870 125 4985
email: a.bull@ic.ac.uk
http://www.bg.ic.ac.uk/staff/abull

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Hi,

We had a Flock system a few years ago in our labn and eventually sent
it back, as we were unable to properly use it for several reasons:

- We have a relatively small space in New York City, so the system
was never far from a floor or wall with metal studs.

- Beware the automatic gain control! We had an issue (at least with
the extended range transmitter) where if the distance from the
transmitter to the birds changed too greatly over time, the automatic
gain control would kick in, and cause very large artifacts in the
data we collected. This was not due to metal interference, as we
could duplicate the situation in the middle of someone's lawn in his
backyard. So, whatever test you're doing, try to make sure the
distance from your birds to the transmitter stays constant.

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Rajshree,



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