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Proposal for SAS Interlaboratory Test Program
- Subject: Proposal for SAS Interlaboratory Test Program
- From: "John D. Barnes" <john.barnes@nist.gov>
- Date: Tue, 1 Dec 98 16:55:38 -0400
SAS Interlaboratory Test Program Solicitatiuon of Intent to Participate Given that the worldwide SWmall-Angle Scatterinig community consists of something like 1500 practitioners, now seems like a good time to evaluate the performace of the measuring system represented by SAS techniques in an objective manner. The generally accepted way to conduct such assessments of performance of a measuring system is through a suitably designed interlaboratory test program, commonly referred to as a "round-robin." This name persists in spite of the fact that it is usually not necessary to pass samples from one laboratory to another. Simple plots of results from a couple of specimens of suitably homogenmeous materials obtained in different laboratories are usually sufficient to demonstrate whether existing standards are adequate or need improvement. This announcement is intended to determine whether the SAS community is interested in such an undertaking and to solicit suggestions that would aid in the design of such a program. Please e-mail your replies to the following questions to me at john.barnes@nist.gov. I will collate the results, publish them, and consult with other members of the IUCr SAS Commission to determine what the next steps ought to be. 1. Would you be interested in carrying out measurements on specimens of between 2 and 4 materials and reporting thye results for tabulation? 2. If your answwer to question 1 is "yes" what materials would you suggest as being appropriate for use in an interlaboratory test program? What attributes of these materials should be measured? In order to focus the discussion I would prefer to designj the program in a ammner that will let virtually any member of the SAS community participate. This implies that test scatterers should be isotropic, so that people with 1-d systems can characterize them. It would be desirsble to have materials that are suitable for use with both neutrons and x-rays. The amount of sample handling required for an end user to carry out the measurmenets should be minimized. 3. What methods (SAXS, SANS, USAXS, SALS, etc) would you be able to employ? 4. Can you suggest sources of suitable materials? 5. Would you be able to manufacture samples for one or more of these materials? 6. What test results should participants submiut? What particulars of the experiment should be included asauxiliary data to be submitted by the participants? Thank You Dr. John D. Barnes email: john.barnes@nist.gov Natl Inst of Stds and Tech Voice: 301-975-6786 100 Bureau Drive, Stop 8544 FAX: 301-975-4977 Gaithersburg, MD 20899 URL: http://www.nist.gov/sas or http://www.ctcms.nist.gov/~jdbarnes
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