EXPLORATION OF NMR DATA OF GLASSES BY MEANS OF FORMAL CONCEPT ANALYSIS

After explaining the mathematical background of formal concept analysi s this method was applied to Si-29-NMR data (chemical shift and full w idth at half height of the corresponding signals) of 31 calcium-alumin osilicate glasses. Conceptual scaling of the data was necessary to tra nsform the experimental data into a single-valued context. Interpretat ion of the results was performed on the basis of a structural model(Q( n)(m) units model) for the glasses developed intuitively in a previous work. The results of the formal concept analysis applied to the NMR d ata and to the composition of the glasses in terms of distinct structu ral units allowed a confirmation of the Q(n)(m) model.