The human factor: results of a small-angle scattering data analysis round robin

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-12-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
12
1618-1629
Series
Journal of Applied Crystallography, Volume 56, issue 6 Pt
Abstract
A round-robin study has been carried out to estimate the impact of the human element in small-angle scattering data analysis. Four corrected datasets were provided to participants ready for analysis. All datasets were measured on samples containing spherical scatterers, with two datasets in dilute dispersions and two from powders. Most of the 46 participants correctly identified the number of populations in the dilute dispersions, with half of the population mean entries within 1.5% and half of the population width entries within 40%. Due to the added complexity of the structure factor, far fewer people submitted answers on the powder datasets. For those that did, half of the entries for the means and widths were within 44 and 86%, respectively. This round-robin experiment highlights several causes for the discrepancies, for which solutions are proposed.
Description
Funding Information: KT acknowledges the NIST–NRC postdoctoral fellowship program for support. This work was partially funded through the European Metrology Programme for Innovation and Research (EMPIR) project No. 17NRM04. Publisher Copyright: © 2023 International Union of Crystallography. All rights reserved.
Keywords
data analysis, interlaboratory comparability, nanomaterials, nanostructure quantification, round robins, small-angle scattering
Other note
Citation
Pauw , B R , Smales , G J , Anker , A S , Annadurai , V , Balazs , D M , Bienert , R , Bouwman , W G , Breßler , I , Breternitz , J , Brok , E S , Bryant , G , Clulow , A J , Crater , E R , De Geuser , F , Giudice , A D , Deumer , J , Disch , S , Dutt , S , Frank , K , Fratini , E , Garcia , P R A F , Gilbert , E P , Hahn , M B , Hallett , J , Hohenschutz , M , Hollamby , M , Huband , S , Ilavsky , J , Jochum , J K , Juelsholt , M , Mansel , B W , Penttilä , P , Pittkowski , R K , Portale , G , Pozzo , L D , Rochels , L , Rosalie , J M , Saloga , P E J , Seibt , S , Smith , A J , Smith , G N , Spiering , G A , Stawski , T M , Taché , O , Thünemann , A F , Toth , K , Whitten , A E & Wuttke , J 2023 , ' The human factor: results of a small-angle scattering data analysis round robin ' , Journal of Applied Crystallography , vol. 56 , no. 6 Pt , pp. 1618-1629 . https://doi.org/10.1107/S1600576723008324