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COSET is a program written in ISO C99 with POSIX extensions which uses left coset decompositions to determine possible merohedral and pseudo-merohedral twin laws. In addition to a stand-alone program, the code may be compiled as a Python extension module. The program can create SHELXL instruction files which incorporate the appropriate TWIN and BASF instructions for the possible twin law(s). COSET may also be directed to execute a locally installed copy of the SHELXL binary executable to test the candidate twin laws in trial refinements. This facilitates the quick screening and assessment of possible twin laws. [ABSTRACT FROM AUTHOR]

In service in the ubiquitous networking environment, it is expected that flexible interaction between the user and the things (resource) in the real world will become important. In order to realize such an interaction, there must be a system in which the resource to be utilized can be searched for with its attribute information as keys. Consequently, this paper proposes a DHT (distributed hash table)-based P2P search system using a new indexing method called pseudo-candidate key indexing. A problem of the conventional DHT-based P2P search system is that a large amount of communication is needed in the search process. The proposed system attempts to deal with the problem by preparing an index for all search conditions which are useful to the user, thus reducing the amount of communication in the search. A simulation verifies that the proposed system is scalable. © 2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 90(11): 81–94, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.20317 [ABSTRACT FROM AUTHOR]

Provides tool for the systematic search of pseudoymmetry. Prediction of phase transitions at higher temperature; Search for ferroelectric materials; Detection of false symmetry assignments.