Help me understand

Message boards : SETI@home Science : Help me understand
Message board moderation

To post messages, you must log in.

AuthorMessage
Bobby

Send message
Joined: 25 Dec 07
Posts: 3
Credit: 6,190,904
RAC: 35
United States
Message 2042815 - Posted: 3 Apr 2020, 20:32:08 UTC

Myself along with other I've spoken to do hope you reconsider your plans on stopping this project.

Let the data pile up until there is a more effective way to sort it. Machine learning, AI, advanced scripts, etc.
Is it other reasons?

I never thought that this Seti@home would accept the idea of giving up because its too much.
ID: 2042815 · Report as offensive     Reply Quote
Profile William Rothamel
Avatar

Send message
Joined: 25 Oct 06
Posts: 3756
Credit: 1,999,735
RAC: 4
United States
Message 2042852 - Posted: 4 Apr 2020, 0:00:33 UTC - in response to Message 2042815.  

They were not analyzing any data--just stockpiling it. Not clear if there were any computations deciding what to keep--or whether tor not it was an effective culling. if they cannot answer this to we unsophisticated proles then They deserve to go out of business.
.
ID: 2042852 · Report as offensive     Reply Quote
Profile Gary Charpentier Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Volunteer tester
Avatar

Send message
Joined: 25 Dec 00
Posts: 29156
Credit: 53,134,872
RAC: 32
United States
Message 2042885 - Posted: 4 Apr 2020, 3:51:57 UTC

Take Sky. Divide into pixels. Store data from each observation, frequency, type, strength, polarization, and others in the pixel.

Question what pixel had repeated signal.

Answer, sort, sort, sort, sort.

Unfortunately sorting can only be done on data that isn't changing. Hence they have to stop filling the many many terabyte size database. Also consider just how huge the indices are going to be and how long it is going to take to build them. Unfortunately this isn't a problem that can be broken down and sent out to many processors, it is a linear problem.
ID: 2042885 · Report as offensive     Reply Quote
Profile Tom M
Volunteer tester

Send message
Joined: 28 Nov 02
Posts: 5121
Credit: 276,046,078
RAC: 462
Message 2043507 - Posted: 7 Apr 2020, 13:57:42 UTC - in response to Message 2042885.  

Take Sky. Divide into pixels. Store data from each observation, frequency, type, strength, polarization, and others in the pixel.

Question what pixel had repeated signal.

Answer, sort, sort, sort, sort.

Unfortunately sorting can only be done on data that isn't changing. Hence they have to stop filling the many many terabyte size database. Also consider just how huge the indices are going to be and how long it is going to take to build them. Unfortunately this isn't a problem that can be broken down and sent out to many processors, it is a linear problem.


It is very common to create what is called a "snap shot" of the operational DB that is then used for data analysis. This, in theory, could allow the volunteers to continue to pileup data.

I am presuming that is technically feasible. I am also presuming that the time the staff spends keeping Seti@Home volunteers running reduces the amount of time spent on thinking/pondering/imagineering about the data analysis step.

While I miss being able to process S@H data I also would very much like to "see" if there are any Seti signals hidden in the observations we have processed.

Tom
A proud member of the OFA (Old Farts Association).
ID: 2043507 · Report as offensive     Reply Quote
rob smith Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Volunteer moderator
Volunteer tester

Send message
Joined: 7 Mar 03
Posts: 20779
Credit: 416,307,556
RAC: 380
United Kingdom
Message 2043517 - Posted: 7 Apr 2020, 15:12:59 UTC

To get a better understanding of what is being done, and what the problems with the data (both in terms of size and complexity) it is well worth reading through David Anderson's posts about Nebula:
https://setiathome.berkeley.edu/forum_forum.php?id=1511
Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?
ID: 2043517 · Report as offensive     Reply Quote

Message boards : SETI@home Science : Help me understand


 
©2022 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.