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Results of questionnaire concerning SAS formats
- Subject: Results of questionnaire concerning SAS formats
- From: SAS workshop <sas@ill.fr>
- Date: Thu, 21 Aug 1997 16:26:10 +0200
In May this year, we sent out a questionnaire concerning the use of facilities and of data treatment programs by the small-angle scattering community of the ILL and the ESRF, as well as their experience with different data formats. Here, we'd like to inform you about the outcome of this exercise. (If you receive this e-mail several times (other than via SA_SCAT) or if you don't like to get any further information from us about this subject, please tell us. We'd also like to be informed of any modified e-mail addresses.) Altogether, we received answers from 55 out of about 500 people to whom we had sent the e-mail. Their answers are summarised below: 1.) Fields of study 1. Biological assemblies: 18 7. Rheological studies: 11 2. Membranes structures: 11 8. Voids & defects: 5 3. Colloids: 17 9. Phase studies, nucleation etc: 19 4. Conc. polymer systems: 14 10. Critical phenomena: 11 5. Copolymers: 18 11. Magnetic flux lattices: 3 6. Polymer networks: 8 12. Time resolved experiments: 22 13. Other, please specify: 8 Fields named under "other" were: Liquid crystals (3), polymer adsorption, scattering from gratings, supported metal catalysis, protein folding, crystallization 2.) Synchrotrons and/or neutron sources used: (The European bias is primarily a reflection of our e-mail list which started from ILL and ESRF user lists) 20 were named (multiple nominations) ILL 28 SRS (Daresbury) 18 ESRF 17 ISIS (RAL) 15 DORIS/HASYLAB/DESY/EMBL 11 LLB (Saclay) 6 RISO 6 LURE (Saclay) 5 NIST 4 ORNL 4 Photon Factory (Japan) 3 NSLS (Brookhaven NL) 3 GKSS 3 KFA JULICH 3 KENS (Japan) 2 Argonne 2 Elettra (Trieste) 2 HMI 2 Studsvik 1 Los Alamos 1 3.) Type(s) of camera(s) used A wide variety of cameras was named. We refrain from citing them all here. 4.) Kinds of data treatment 1.) Indirect transforms 19 2.) Particle size distribution 20 3.) Fitting of 1D, 2D functions 32 4.) Model fitting 34 5.) De-smearing 13 6.) Other, please specify 17 Data treatment mentioned under "other" were:deconvolution p(r) -> rho(r), single-crystal analysis, Hayter-Penfold analysis, MaxEnt, Fourier transforms, Crowley inversion, time evolution of Bragg peaks, measurement of orientations, analysis of projections, correlation functions, shape analysis. 5.) Exported data reduction, data analysis or interconversion utilities Site supplied: SRS, OTOKO, BSL, ILL, Genie, Colette, Oak Ridge Distributed/commercial: MAR, Peakfit, Transform, PDH/ITP, SCT, Mathematica, Cerius, RFIT, Gnom, Image Quant, PVWave, Igor, Spyglass, Origin, Lotus Own: 36 users reported on the use of their own programs, of which most are neither available to the community nor documented 6.) Web sites containing information about data formats for SAS Surprisingly few sites were mentioned, which probably reflects that though instruments and sample facilities are described by the large centres only rarely is given information on data formats. More worrying to ILL is that even the ILL web site which has contained information about ILL SANS data formats for some time seems to be unknown by most people as a source for such information (use the page finder utility...)! The sites cited were: http://www.ill.fr http://wserv1.d1.ac.uk/SRS/NCD/manual.bsl.html http://wserv1.dl.ac.uk/SRS/NCD/manual.otoko.html http://wserv1.d1.ac.uk/SRS/NCD/computing.html http://www.neutron.anl.gov/NeXus/ http://www.dl.ac.uk/SRS/CCP13 http://wserv1.dl.ac.uk/SRS/CCP13/Software.html 7.) Major treatment problems related to data formats 14 had no problems dealing with their data 6 mentioned that they would like a common standard 2 commented on Unix <=> VMS problems Formats: 7 marked a distinct preference for simple ASCII data 2 proposed CIF, especially for sequences of 2-D data 1 proposed that an EXCEL option would be generally useful 6 wished to have interconversion programs available, especially in source form Amongst those commenting there was a general wish for documentation on formats in use, at least as a starting point even if a common standard could not be envisaged. INFORMAL WORKSHOP ON SAS DATA FORMATS AND INTERCONVERSION UTILITIES We are contacting in the near future a number of package authors and maintainers to propose a workshop to face these problems of compatibility. This will take place at ILL, Grenoble, February 4-6, 1998. We hope that bringing together a small active group prepared to program will actually produce a policy and even sets of conversion programs! THANKS TO ALL WHO ANSWERED ! ************************* If you wish to have more information about these responses or you would like to offer additional comments please send them to: sas@ill.fr ************************* SAS groups of ESRF and ILL, Grenoble sas@ill.fr Monitored by Wim Bras(ESRF), Claudio Ferrero(ESRF), Ron Ghosh(ILL), Roland May(ILL) Peter Timmins(ILL).
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