archiv~1: Re: SETI Arecibo message to m13

Re: SETI Arecibo message to m13

Yvan Dutil ( )
Thu, 05 Nov 1998 15:19:11 -0500

At 12:28 05-11-98 -0700, you wrote:
>>The signal has been send on a poor target, far away and for a very
>>short period of time. Even worst, the signal is coded in such a way
>>that you need a "group" of Nobel prize pluged in paralel to dechipher it.
>>This was a publicity stunt, no more.

>Prime numbers are often used to code signals, and didn't this use a grid
>from the product of 2 small prime numbers. Should not be a problem.
>Just a lack of funding, no more.

The problem is not there. The message is just not clear enough to be easyly
understood. There is a story in the Slovskii & Sagan book about a "test"
beeing done using the same data set minus one pixels. These conditions
nobody was able to deceipher the message.

If you mind, in the next few weeks a new "message" will put on the web to be
field tested before use. You will learned whats append to a message when he
get scramble by the noise and the interference. The sender absolutly need to
work fairly hard to help the receiver, otherwise this is an hopeless
Certainly, the Arecibo message will fail these requirements.

I will present a paper at the next AAS meeting about the problems of targets
selection and message conception for ACTIVE SETI at the next AAS meeting
in january 1999.

>If you don't have your computer working at night, it can be used to look
>for large prime numbers as part of the distributed computing project
>at, the success of projects like this may have
>helped encourage other projects like the upcoming seti@home.

I am already doing that!

Yvan Dutil