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Posts by Infusioned
Posts by Infusioned
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1) Message boards : News : Progress Report (Message 54740)
Posted 9 Jun 2012 by Infusioned
Excellent! It is interesting there is a star "hot spot" that is present on (I presume) the leading edge (direction of rotation) of the stream. What is interesting is that the hot spot is not on a the neutral axis of the stream, that is, it is to the outside. Is that because centripetal accelerations are high and pushing them towards the outside of the center line? I would expect the inside of the stream to have a high star density as it would be experiencing the same centripetal accelerations and shove all the stars together. Also, the stream tip should be artificially compacted as the leading edge of the stream is thinned out and elongated (much like a comet and tail).

It is curious that there is a low star density area on the inside of the steam as well as ahead of the steam. Are there other things at work I am missing or is the stream young in formation and hasn't had time to arrange itself as one would expect? Or, is it the very real possibility that I am wrong on all counts and expectations?


Glad you are ok. Thanks for the update; much appreciated.



Edit: I forgot to add the 3D component to the plot. So, the stream is not planar and curls so the low density "inside edge" as I referred to it, is actually behind the leading edge in terms of direction of travel. Therefore it seams the hot spot is acting like the comet center and everything else is the dust trail so to speak.
2) Message boards : MilkyWay@home Science : MilkyWay@Home Progress Report (Old) (Message 54510)
Posted 25 May 2012 by Infusioned
Hi, I'm new to MilkyWay@home. This is a very intriguing project. However, I notice that there have been essentially no progress reports for about two years! We volunteers might need a little stroking or maybe Seti@home would be a more satisfying place for our cycles!

A real question while I'm ranting: the axes on the plots, are those log-likelihood fit statistics? It seems to me that the convergence to better fits is insignificant. Also, how do you know that you aren't heading slowing into a local minima?



This should help explain things: Validating Evolutionary Algorithms on
Volunteer Computing Grids


Evolutionary algorithms (EAs) are an approach to performing optimization
of challenging problems in computational science, as they can efficiently find
global minima in challenging search spaces with many local minima. Traditional
methods such as conjugate gradient descent and newton methods quickly get
stuck in local minima and fail in these circumstances. This work examines how
to efficiently perform validation for evolutionary algorithms on volunteer computing
grids, using MilkyWay@Home as a test system.
3) Message boards : News : New Separation Runs (Message 54013)
Posted 14 Apr 2012 by Infusioned
I haven't received any ATI work in months, is there any problem?

ATI HD6970, lastest drivers.



I'd say the problem is on your end. I have had a steady stream of non-stop work for some time now.

Are you using the latest Boinc version (even still that wouldn't necessarily be the problem)? I would detach from the project and re-attatch. If that doesn't work, uninstall and re-install Boinc, and then re-attatch to Milkyway.
4) Message boards : News : New Separation Runs (Message 53905)
Posted 4 Apr 2012 by Infusioned
I've just started up some new runs, with names like "ps_separation_14_2s_..." and "ps_separation_15_2s_...". These runs are designed to study some of the Computer Science that drives Milkyway@home.

As always, let me know if you have any trouble with these work units.

-Matthew N



I am probably going to butcher this, so forgive me, in adavance:

Is this to explore fitness with stripe width and/or creating half stripes (using half data from each adjacent stripe)? I thought I read that somewhere in the past, but I don't know whatever became of that.
5) Message boards : MilkyWay@home Science : MilkyWay@Home Progress Report (Old) (Message 53747)
Posted 23 Mar 2012 by Infusioned
This thread is outdated... I'm considering unstickying it. The reason the links don't show up is because John Vickers used his student webspace at RPI to host the images; now that he's graduated, that webspace has ceased to exist. I'll try to get in touch with him and get the images back (I don't remember what they all looked like).

I'm trying to find the time to write an updated summary, but it's very difficult right now - I'm in the middle of several projects, and Milkyway@home is just one of those. I'll bump the update up a few notches in my queue.


Matthew, this should help:


I have re-written this as an article on the United BOINC website;
MilkyWay@Home Progress in plotting the stars

Thank you John Vickers, you write very well about science. You make it easy to read!

You should install blogging software on this website, maybe MilkywayDomain/blog. Install something like WordPress, its free and it would allow you to blog properly about your project science. It would be way better and easier than trying to post it in forum messages. Wordpress; http://wordpress.org/

John.
Website Admin,
UnitedBoinc.com


(link that got lost when I quoted):
http://www.unitedboinc.com/en/news/1-latest-news/212-milkywayhome-progress-in-plotting-the-stars
6) Message boards : Number crunching : HD7970 on the horizon .. (Message 52033)
Posted 23 Dec 2011 by Infusioned
Anandtech review:

http://www.anandtech.com/show/5261/amd-radeon-hd-7970-review
7) Message boards : Number crunching : Server Out Of Work (Message 51992)
Posted 17 Dec 2011 by Infusioned
Same. I've been out of GPU work for a few days now. There was a brief blip were I got a few, but that was it.
8) Message boards : Number crunching : AnandTech Hot Deals (ATI HD 5870) (Message 51849)
Posted 6 Dec 2011 by Infusioned
This morning I was cruising the AnandTech Hot Deals Forums ( http://forums.anandtech.com/forumdisplay.php?f=16 )

and came across this deal for an ATI HD 5870 1G for $139 USD + $5 USD shipping. For anyone looking to upgrade from their 4xxx series like me I thought I would post.

Deal Thread:
http://forums.anandtech.com/showthread.php?t=2210840

Happy crunching.
9) Message boards : MilkyWay@home Science : The Map? (Message 51201)
Posted 23 Sep 2011 by Infusioned
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