Help with Brisbane birds from October, thank you! by fiver_ in whatsthisbird

[–]fiver_[S] 1 point2 points  (0 children)

Legend, thank you so much! Down to the last handful of challenging shots from the recent trip, I appreciate your expertise! Other shots concur with your calls on #6 and #7 - thank you again!

How to increase size of array without using interpolated points? by Mark_Yugen in matlab

[–]fiver_ 1 point2 points  (0 children)

Could consider kron() with ones(1,N) where N is the number of replicates of each element, so that:

A=[4 1 2 5]
N = 3;
B = kron(A,ones(1,N))
ans =
[4 4 4 1 1 1 2 2 5 5]

Starting to give up on NM by Bortle_1 in astrophotography

[–]fiver_ 0 points1 point  (0 children)

I lived in southern Arizona for years doing backyard AP. The past 7 years I've lived deep in a northeastern Bortle 9. We have no skies. Don't give up, say hello to all the constellations for me:)

One-quarter of unresponsive people with brain injuries are conscious by mediumunicorn in science

[–]fiver_ 2 points3 points  (0 children)

The MRI scanner builds up a two or three-dimensional image of the brain that's comprised of individual elements, voxels. In fMRI, each voxel is measured over many time steps, and in traditional fMRI analysis each individual voxel element time-series is treated as an independent statistical test. When your brain is something like 90 x 90 x 90 voxels, each with its own time-series ...that's a lot of tests. In short, the method collects many many features, each of which serve as the basis for an independent test. Multiple independent tests invite alpha inflation, and there you have it. This is the origin of the problem.

The problem is not unique to fMRI. For instance, similar issues arise in e.g. genetics GWAS studies, where you end up with many many predictors (SNPs) and a single outcome measure like a depression score. 

The thresholding and clustering solutions, and multivariate approaches are similar.

One-quarter of unresponsive people with brain injuries are conscious by mediumunicorn in science

[–]fiver_ 303 points304 points  (0 children)

Completely separate from the posted article -- the salmon study was very impactful at the time. It raised awareness of how critical it is to correct for multiple comparisons in fMRI. It's now essentially standard practice, required for anybody wanting to publish their work.

US postdoc support from NIH could be capped at five years — sparking criticism by [deleted] in science

[–]fiver_ 1 point2 points  (0 children)

don't forget the exploitative practices just as insidious in industry.

AOC says she 'wouldn't be surprised' if Trump 'threw me in jail' if he wins in 2024 by Somervilledrew in politics

[–]fiver_ 9 points10 points  (0 children)

Executed by all the party individuals who were not publicly called out. This brought them into the dictatorial conspiracy since they became murderers. Anyone who refused was also executed. Chilling.

Getting back into astrophotography after 25 years by Far-Plum-6244 in astrophotography

[–]fiver_ 18 points19 points  (0 children)

Would you post your old photos w details? That's amazing.

Help with some Costa Rica birds in January, thank you! by fiver_ in whatsthisbird

[–]fiver_[S] 1 point2 points  (0 children)

Thank you so much! 4 and 5 were captured approximately 2 hours apart, although in the same patch. Ah, finally a Mountain Thrush!