Very interesting question for me :)


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Questions and Answers : Getting started : Very interesting question for me :)

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Vlad Pasteryk
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Message 1065530 - Posted: 11 Jan 2011, 8:03:53 UTC

Why project uses a Gaussian distribution?

Maybe it is not Gaussian ...
Maybe it's the distribution of Rice or another?

If this is not gaussian distribution turns out that we never hear those weak signals. How long the project would not exist.

Why Gaussian? I think you understand me:)

Thank you for your reply:)

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Message 1065534 - Posted: 11 Jan 2011, 8:12:49 UTC - in response to Message 1065530.


http://setiathome.berkeley.edu/sah_glossary.php
http://seticlassic.ssl.berkeley.edu/about_seti/about_seti_at_home_4.html
http://seticlassic.ssl.berkeley.edu/screensaver/data_analysis.html


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Message 1065543 - Posted: 11 Jan 2011, 9:00:27 UTC

But I can not understand the project since 1999 and has not been any sign of weak signals from our alien friends? :)

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Message 1065552 - Posted: 11 Jan 2011, 9:28:40 UTC - in response to Message 1065543.
Last modified: 11 Jan 2011, 9:32:33 UTC



There are billions of "signals" found:
http://setiathome.berkeley.edu/sci_status.html

but they have to be checked against each other for Persistency:
http://setiathome.berkeley.edu/ntpckr_faq.php
http://setiathome.berkeley.edu/ntpckr.php

http://setiathome.berkeley.edu/forum_forum.php?id=830
http://setiathome.berkeley.edu/forum_thread.php?id=60113


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Vlad Pasteryk
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Message 1065560 - Posted: 11 Jan 2011, 10:31:56 UTC
Last modified: 11 Jan 2011, 10:36:10 UTC

Q: How are candidates ranked?

A: They are ranked by score. The score is the probability that the exact set of signals we observed at that point in the sky would occur due to random chance. So the lower the score, the better.


This means that the lower the rating(credits) for the task the better signal and credits is my current rank(111)? Something I do not understand please explain to me.

Sorry for the stupid question but I am a new member in this project and not all understand :)

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Message 1065583 - Posted: 11 Jan 2011, 13:41:27 UTC - in response to Message 1065560.

credits are given for FLOps done. Not but the amount of signals seen in any given WU. Credits vary mainly due to the angle range(if and how fast the radar is moving) Very Low Angle Range(VLAR) WU's are given more credit because they are looking at a lot of data from a smaller portion of space. These WU's can be slow to process and shouldnt be confused with Astropulse(AP) WU's which can take more than a day to process. Very High Angle Range(VHAR) WU's are from a fast moving scan and have less data to calculate. These WU's are short, usually less than an hour. VHAR WU's dont garner much credit either. Though in the end you'll pretty much get the same amount of credit for hours worked regardless of which type of WU you get
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Message 1065601 - Posted: 11 Jan 2011, 15:01:33 UTC - in response to Message 1065560.

Q: How are candidates ranked?

A: They are ranked by score. The score is the probability that the exact set of signals we observed at that point in the sky would occur due to random chance. So the lower the score, the better.


This means that the lower the rating(credits) for the task the better signal and credits is my current rank(111)? Something I do not understand please explain to me.

Sorry for the stupid question but I am a new member in this project and not all understand :)


The "score" of a candidate is not the same as the "credit" you receive when completing a workunit. So no, a lower credit workunit doesn't mean it is a better candidate for a signal.

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Message 1065700 - Posted: 11 Jan 2011, 21:38:13 UTC

OK but if I had heard these weak signals you tell me about it?

How do I know about it?

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Message 1065725 - Posted: 11 Jan 2011, 22:44:26 UTC - in response to Message 1065700.

Most WU's "hear" something. Those results are added to the database when you report back. If they fit the definition that have been set for S@H then they will be charted and if that signal repeats then its will eventually be looked at closer. However S@h gets millions of results that it must weed through using the NTPKR which is described elsewhere. It's complicated but it works
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Message 1065871 - Posted: 12 Jan 2011, 12:31:01 UTC
Last modified: 12 Jan 2011, 12:31:28 UTC

If my computer has only one processor, this means that I can perform only one task?

If two, two tasks and so on?

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Message 1065879 - Posted: 12 Jan 2011, 13:28:03 UTC - in response to Message 1065871.

yes that is correct
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Message 1066157 - Posted: 13 Jan 2011, 8:42:10 UTC

Why so long there is no credit for the task? My time zone is UTC +2

Today, January 13.

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Message 1066162 - Posted: 13 Jan 2011, 9:47:07 UTC - in response to Message 1066157.
Last modified: 13 Jan 2011, 9:54:56 UTC

If you clink the link in that row under "Work unit", you'll see that your result has not yet been validated because the other computer (#2808032) that's working on the same WU hasn't yet reported back. The "minimum quorum" of 2 means that at least two results must be available to the validator before credit is granted. That other host has an average turnaround time of 9 days, so it will probably be about a week before anything more happens there.

P.S. The corresponding link for the task that’s still in progess, in the row above, shows that someone else is waiting for your host to finish. Hurry up! ;)
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Message 1066164 - Posted: 13 Jan 2011, 9:55:24 UTC

Thanks for the reply ... I already knew everything ... I'll have to wait:)

Questions and Answers : Getting started : Very interesting question for me :)

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