Scientific Interest Groups


Scientific Interest Groups (SIGs) are a vital part of the ACA.  There are 14 SIGs that each represent a particular discipline within the field of crystallography, allowing members to focus on their area of specialty while retaining access to interaction with the entire range of crystallographic techniques and applications.  Any member may join however many SIGs they wish. There are no additional fees association with SIG membership.


SIGs are responsible for defining the program at annual meetings.  Each SIG is charges with organizing at least one half-day session every two years.  This is a great opportunity for members to get involved in the ACA at a grass roots level and have a direct impact upon the annual meeting.


Best Practices for Data Analysis & Archiving

Biological Macromolecules


Fiber Diffraction

General Interest


Light Sources (fka: Synchrotron Radiation)

Materials Science

Neutron Scattering

Powder Diffraction

Service Crystallography

Small Angle Scattering

Small Molecules

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SIGs exist to give members the opportunity to focus on specialty areas while remaining connected to the entire scope of crystallographic applications.  Joining a SIG means finding individuals within the larger network who have common scientific goals, challenges and interests.



Activities & Responsibilities


A scientific interest group, in addition to any other activity described in their constitution or petition for formation, will organize at least one half-day session every year at an annual meeting. The Program Chair will make assignment of meeting rooms and time blocks for these sessions. Within the time blocks, however, the format may be any that is considered appropriate by the Group. Abstracts for the sessions must appear in the program and abstract book and must conform to the standard regulations made by the Program Chair with respect to format, deadlines, etc. These sessions will be interspersed with the general plenary sessions.


An annual report of the SIG activities should be submitted to the Council one month before the annual meeting.  A representative of the SIG should meet with the Council at the annual meeting.  A report of scientific highlights of the year should be submitted to the Council by December 1st, for review and enclosure in the February issue of the ACA newsletter.


One representative from each SIG should attend the annual planning session held at the conclusion (or the next day) of the annual meeting, to develop the next year's meeting program.


The resources of the ACA, such as AIP services, newsletter, etc., will be available to the Group.  As an ACA SIG, the Group will be subjected to the ACA Constitution, Bylaws and Operating Rules.  Proposed changes in the Group's rules, dues, etc., must be approved by the ACA Council.



How To Form a SIG


An Interest Group may be activated by approval of the ACA Council. To form a Group, interested participants must submit to the ACA Council a petition, which includes:


(a) The name of the Group and a statement of its area of interest.


(b) A proposed set of rules and regulations under which the group will operate. Selection of officers, a description of likely activities, program planning responsibilities, etc., should be covered. These rules must be consistent with the ACA Constitution, Bylaws, and Operating Rules.


(c) A proposed dues structure, if any, and the purposes for which the dues will be used. The Group's Treasurer will do collection, accounting, and dispersal of dues required by the Group.


(d) Signatures of at least 30 current or intending members of the ACA. Members of ACA Interest Groups must be or become members of the ACA.


(e) For Council approval to become effective, enough intending members must become current ACA members such that within 90 days after Council's affirmative action the total number of petitioning active members is at least 30.


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    2019 Meeting

 July 20 - 24

 Cincinnati/northern Kentucky