Is that where you close one eye and squint with the other? ;-)
Could be, could be .... :-)
Mark I is the first visual instrument you have - you were born with eyeballs. When you get older they usually need augmenting, thus entailing revisions or 'mods' as my son would put it .... :-)
Cheers, Mike.
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal
Is that where you close one eye and squint with the other? ;-)
Could be, could be .... :-)
Mark I is the first visual instrument you have - you were born with eyeballs. When you get older they usually need augmenting, thus entailing revisions or 'mods' as my son would put it .... :-)
Cheers, Mike.
Then I suppose I'm on "Mark III" (eyeballs -> glasses -> contacts)... Of course, I don't need the contacts for computer work, as I'm near-sighted... I have this joke that I hope that as I grow older, since the tendency is to become more far-sighted, I'll have a period of normalcy....
Hey, I see I have an "einstein_S5R3 4.27 h1_0724.85_S5r2__0_S5R3a_0" upcoming on my 4800. Does that mean it's a peak, since it's a zero task number? should be looking at one of the poles. In other words a LONG running wu.
Hey, I see I have an "einstein_S5R3 4.27 h1_0724.85_S5r2__0_S5R3a_0" upcoming on my 4800. Does that mean it's a peak, since it's a zero task number? should be looking at one of the poles. In other words a LONG running wu.
Try cutting some ~ spherical fruit up into say 8 slices with 4 cuts in the vertical plane through the core but each rotated ~ 45 degrees, and note/examine how a slice is fat in the middle and gets narrower to each end.
While we’re doing math trivia, the shape of the peel on such a slice, i.e. one of the four regions into which a spherical surface is divided by a pair of distinct great circles, is called a “lune�.
Try cutting some ~ spherical fruit up into say 8 slices with 4 cuts in the vertical plane through the core but each rotated ~ 45 degrees, and note/examine how a slice is fat in the middle and gets narrower to each end.
While we’re doing math trivia, the shape of the peel on such a slice, i.e. one of the four regions into which a spherical surface is divided by a pair of distinct great circles, is called a “lune�.
People call me looney... I do have a distinct "great circle", that I wish I could get rid of too...
While we’re doing math trivia, the shape of the peel on such a slice, i.e. one of the four regions into which a spherical surface is divided by a pair of distinct great circles, is called a “lune�.
Cool! You can see why too ... :-)
Now, I've discovered that the signal template placement is not a simple step/walk [ like rows/columns or rank/file ] through latitude and longitude on the celestial sphere, see Efficiencies of a hexagonal template bank placement to search for gravitational waves from inspiralling compact binaries in groundbased detectors and also here. It is of arcane/nerdy interest that the placement algorithm is based upon study in the area of minimal sphere packing - that is the stacking of fruit at the greengrocer! Please note that this is the technique used for generation of our current work units. The quoted increase in computing efficiency [ compared to a bland 'square' traverse ] - by not over-covering sky areas - is ~ 40%. While that's a real chunk at any level of computing power, just apply that to the whole E@H effort - currently estimated at ~ 90 TFlops! This is a superb outcome as it reaches towards optimal scientific use of the donated resources of E@H contributors ....
I haven't yet found an overall map of how this adaptive hexagonal placement looks on the sky - but I think my earlier analysis of why the work unit timing had quadratic behaviour is thus most probably suspect in the detail of the angle step-along logic ( at least! ). But for any given frequency, that sky pattern will impact on the noted variation of completion time with sequence/task number.
I'll see if I can find that sky pattern, or alternatively any kind & knowing project scientist reading here could perhaps not let me die wondering! :-)
Cheers, Mike.
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal
Interesting stuff, but I'm not so sure it's related to E@H. What is described in those articles is related to looking for "inspiralling binaries", at E@H we are in "continuous wave" department.
Anyway, you can directly look at how the pattern that E@H uses to traverse the sky here . Note that the screenshots that show multiple "rings" in the sky-sphere represent an overlay of several results.
Interesting stuff, but I'm not so sure it's unrelated to E@H. What is described in those articles is related to looking for "inspiralling binaries", at E@H we are in "continuous wave" department.
Anyway, you can directly look at how the pattern that E@H uses to traverse the sky here . Note that the screenshots that show multiple "rings" in the sky-sphere represent an overlay of several results.
CU
Bikeman
Well, done! I'll stop spouting rubbish now and go and find out what's actually happening then ... :-)
Sigh, I was away too long ...
So when did we change from inspirals to continuous?
Cheers, Mike.
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal
RE: seems to pass the
)
Is that where you close one eye and squint with the other? ;-)
RE: Is that where you close
)
Could be, could be .... :-)
Mark I is the first visual instrument you have - you were born with eyeballs. When you get older they usually need augmenting, thus entailing revisions or 'mods' as my son would put it .... :-)
Cheers, Mike.
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal
RE: RE: Is that where you
)
Then I suppose I'm on "Mark III" (eyeballs -> glasses -> contacts)... Of course, I don't need the contacts for computer work, as I'm near-sighted... I have this joke that I hope that as I grow older, since the tendency is to become more far-sighted, I'll have a period of normalcy....
Hey, I see I have an
)
Hey, I see I have an "einstein_S5R3 4.27 h1_0724.85_S5r2__0_S5R3a_0" upcoming on my 4800. Does that mean it's a peak, since it's a zero task number? should be looking at one of the poles. In other words a LONG running wu.
RE: Hey, I see I have an
)
Exactly, that's a biggie .
RE: Try cutting some ~
)
While we’re doing math trivia, the shape of the peel on such a slice, i.e. one of the four regions into which a spherical surface is divided by a pair of distinct great circles, is called a “lune�.
RE: RE: Try cutting some
)
People call me looney... I do have a distinct "great circle", that I wish I could get rid of too...
RE: While we’re doing
)
Cool! You can see why too ... :-)
Now, I've discovered that the signal template placement is not a simple step/walk [ like rows/columns or rank/file ] through latitude and longitude on the celestial sphere, see Efficiencies of a hexagonal template bank placement to search for gravitational waves from inspiralling compact binaries in groundbased detectors and also here. It is of arcane/nerdy interest that the placement algorithm is based upon study in the area of minimal sphere packing - that is the stacking of fruit at the greengrocer! Please note that this is the technique used for generation of our current work units. The quoted increase in computing efficiency [ compared to a bland 'square' traverse ] - by not over-covering sky areas - is ~ 40%. While that's a real chunk at any level of computing power, just apply that to the whole E@H effort - currently estimated at ~ 90 TFlops! This is a superb outcome as it reaches towards optimal scientific use of the donated resources of E@H contributors ....
I haven't yet found an overall map of how this adaptive hexagonal placement looks on the sky - but I think my earlier analysis of why the work unit timing had quadratic behaviour is thus most probably suspect in the detail of the angle step-along logic ( at least! ). But for any given frequency, that sky pattern will impact on the noted variation of completion time with sequence/task number.
I'll see if I can find that sky pattern, or alternatively any kind & knowing project scientist reading here could perhaps not let me die wondering! :-)
Cheers, Mike.
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal
Hi! Interesting stuff, but
)
Hi!
Interesting stuff, but I'm not so sure it's related to E@H. What is described in those articles is related to looking for "inspiralling binaries", at E@H we are in "continuous wave" department.
Anyway, you can directly look at how the pattern that E@H uses to traverse the sky here . Note that the screenshots that show multiple "rings" in the sky-sphere represent an overlay of several results.
CU
Bikeman
RE: Hi! Interesting stuff,
)
Well, done! I'll stop spouting rubbish now and go and find out what's actually happening then ... :-)
Sigh, I was away too long ...
So when did we change from inspirals to continuous?
Cheers, Mike.
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal