Category Archives: Blog posts

Small-angle Scattering: More than nice curves. [Guest post by M. Gallagher-Jones]

[ed: Marcus Gallagher-Jones just finished his Ph.D. project on VUV and X-ray lasers for imaging of biological macromolecules] I was happy to receive an invitation from Brian to write a post for his blog. I can honestly say that I owe a good deal of my knowledge of SAXS from helpful discussions with Brian and […]

Share

CANCELLED: Looking at Nothing on Re-tour

[note: Unfortunately I have to cancel this trip altogether, due to a serious injury in the family, and will not be able to speak at these occasions] I will be heading to ILL to join Martin on SANS beamtime. At the same time, I am taking the opportunity to give my 2014 talk twice more. […]

Share

The Dark Side of Science.

A little step sideways from small-angle scattering for this week’s post. As you are probably aware by now, I sometimes use the LaN weblog to crystallize ideas into something resembling a coherent story. This is needs to be done now, as I am preparing another presentation (due late January), one that covers a tangential topic […]

Share

Error estimation using Fourier Transforms

Estimating uncertainties on data values has always been an important and under-emphasized part of small-angle scattering. Uncertainties are critical to your data: they tell you what is most likely a real difference, and what is probably just measurement noise. Fortunately, many datasets come complete with data uncertainties, but there are still quite a few cases […]

Share

Moving LaN update day to Tuesday

Today is another holiday in Japan. There is a tendency here for the national holidays to be on Mondays or Fridays, and there is typically about one per month of those. So I hope you do not mind, but I would like to move the weekly update date to Tuesdays instead. Mind you, this will […]

Share

Looking at Nothing, Seeing a Lot.

Today is a day of relief for Dr. Julian Stirling and his eight co-authors (with many looking forward to the response, including Raphaël Lévy). The paper released today opposes ten years of prolific work from a group claiming to have made and observed stripes on the surface of nanoparticles (c.f. Figure 0, Figure 1 in […]

Share

Interesting stuff coming later today

Waiting for San Francisco to wake up on their Monday and release the good stuff with chewy centres. Please come back later today It’s up here!

Share

Spending money on Bonse Hart Bling-Bling

[ed1: Progress on the Everything SAXS book has been good: a framework is now in place with chapters, the revision ID on the title page and even a Makefile and readme. The time approaches to enter some content! ed2: Something cool approaches (next week).] Most of the times we are scrounging for crumbs on the […]

Share

So there is an “Everything SAXS”-book, and it is empty!

For a while now, I have wanted to write a book about SAXS, introducing the topics, explaining the details, and including many of the more popular posts from this site. Unfortunately, no lucrative old-style book contracts have been proffered, so I will resort to another approach: a living Git-book.

Share

Spheres, rods, discs, which can fit what?

A remark in a recent paper by Dr. Yojiro Oba (currently at KURRI) caught my attention. It discusses which shape assumption can be appropriate to fit a scattering pattern of polydisperse systems. In the paper, the shape assumption is spherical (based on TEM evidence), and a further remark goes as follows: “ Since no q−a […]

Share