Search found 617 matches

by jsmaje
Fri Aug 15, 2014 12:12 pm
Forum: Stardust@home Discussion
Topic: Phase VII
Replies: 22
Views: 62790

Phase VII

Other than the funky make-over of the web site appearance, what has materially changed? I could find no mention of further progress with tile examination, extraction and analysis techniques, new calibrations, manner of scoring, or anything else to excite me (other than news that some papers have bee...
by jsmaje
Fri Jul 11, 2014 11:13 am
Forum: Stardust@home Discussion
Topic: Welcome news
Replies: 2
Views: 16474

Welcome news

Great to read the team's latest announcement about the science, 12 papers and phase VII.
I'm really looking forward to reading the papers, and to see what the next phase brings.

John
by jsmaje
Tue Jun 17, 2014 12:39 pm
Forum: Stardust@home Community
Topic: Visit to CERN
Replies: 4
Views: 20587

Visit to CERN

Some of you will have visited CERN near Geneva before, but I’ve recently come back from my first time. The 27-kilometer-circumference LHC (Large Hadron Collider, of recent Higgs boson fame) happens to be off-line at the moment while they double the proton-proton beam collision energy to a huge 13-14...
by jsmaje
Fri Mar 14, 2014 1:32 pm
Forum: Stardust@home Problems and Support
Topic: Phase 6 stats and Skill score 'jitter' simulation
Replies: 17
Views: 45547

Re: Phase 6 stats and Skill score 'jitter' simulation

Mike, a weighted filter has no relevance to the expected drops on missing a PM track which you understandably find 'fun' to claw back. Keeps the mind alive! It’s merely a well-known statistical method to reduce the number and size of unexpected skill score changes when instead the opposite happens, ...
by jsmaje
Fri Mar 14, 2014 3:54 am
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

OK, the skill 'jitter' simulation is now back up & running.
My results covering the whole skill range are here, confirming that use of a weighted filter at the beginning of the moving average window would considerably reduce the impact of this inevitable but annoying phenomenon.

John
by jsmaje
Thu Mar 13, 2014 2:20 pm
Forum: Stardust@home Problems and Support
Topic: Phase 6 stats and Skill score 'jitter' simulation
Replies: 17
Views: 45547

Re: Phase 6 stats and Skill score 'jitter' simulation

In response to the parallel discussion here , the skill score ‘jitter’ simulation has now been extended to allow choice of initial skill level between 0 & 1.0, rather than being set only at 0.5 for an ‘average’ duster, and should be back up & running correctly. The result is that there are n...
by jsmaje
Tue Feb 25, 2014 12:21 pm
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

Dan - good to know something is happening on the skill score front; it seems to have caused nothing but vexation so far! Meanwhile, the 'jitter' simulation has now been adapted to also allow choice of initial skill level between 0 & 1.0 in 'custom' mode, rather than the previous set 0.5 level (t...
by jsmaje
Fri Feb 21, 2014 11:22 am
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

O my! So sorry Evelyn :oops: . I think there is an overactive neurone in my brain labelled 'Elaine' downstream from the one that responds to any name beginning with 'E', since we exchanged private messages for some time where she shared quite personal issues. With luck it will soon die off like many...
by jsmaje
Thu Feb 20, 2014 2:05 pm
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

Elaine - please don't despair; we need you! The current skill assessment methods are of course a compromise between addressing previously-raised issues, but I'm sure open to improvement. I hope my upcoming adaptations to the 'Skill score simulation' including initial skill level will reassure you an...
by jsmaje
Tue Feb 18, 2014 1:50 am
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

Hi Evelyn & Mike. In fact I'm an idiot for forgetting my own caveat that the sim assumes an 'average' duster who gets as many PMs wrong as right . Since both your skills are markedly better than that, you will naturally be encountering significantly fewer unexpected rises than falls, and it's fo...
by jsmaje
Mon Feb 17, 2014 1:40 pm
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

Oh dear, sorry to have offended you Evelyn. You may remember I’ve confused your name with Elaine (Keefe) at least once before; I’ve always been hopeless with names, and as I get older it only gets worse. Further in my defence, your present excellent power score of 17690, if divided by an average PM ...
by jsmaje
Sun Feb 16, 2014 12:39 pm
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

Well, there you go Elaine! You make the point for me, that unexpected increases in skill score will occur despite having missed a PM track which happens to coincide with a previously-missed PM of lower value dropping out of the window. This will actually happen as often over time as unwelcome drops,...
by jsmaje
Fri Feb 14, 2014 12:58 pm
Forum: Stardust@home Problems and Support
Topic: Skill score decreasing for found movies
Replies: 32
Views: 74222

Re: Skill score decreasing for found movies

Hi Evelyn (& Jason). Believe me, I share your annoyance with drops in skill score on correctly identifying a PM track when this happens to coincide with a higher-valued PM dropping out of the moving average window. But you’ll recall that dusters were already expressing frustration with the ‘spec...
by jsmaje
Mon Jan 20, 2014 12:22 pm
Forum: Stardust@home Community
Topic: Other Space News
Replies: 139
Views: 477533

Re: Other Space News

Congratulations to the Rosetta team today (20th Jan 2014) on a successful crucial stage in this ambitious and already 10-year-long space venture:

http://www.esa.int/Our_Activities/Space ... ibernation
by jsmaje
Sat Jan 18, 2014 12:20 pm
Forum: Stardust@home Problems and Support
Topic: Phase 6 stats and Skill score 'jitter' simulation
Replies: 17
Views: 45547

Re: Phase 6 stats and Skill score 'jitter' simulation

Thanks Dan, and to all others who have responded. So, what is my theory as to how some manage to attain and maintain perfect skill? Well, Mike has pointed out that it isn’t necessarily maintained all the time, needing up to 100 consecutively correct PM track identifications after even a single miss;...