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                                  Preface


The RuZA workshop (RuZA2015) was an international Russian-South African
workshop on applications of Formal Concept Analysis in Computer Science
and Data Analysis. All of the contributed research papers reported on research
where models based on Formal Concept Analysis were extensively used. Formal
concept analysis (FCA) is a branch of lattice theory motivated by the need for
a clear formalization of the notions of concept and conceptual hierarchy. It has
been successfully used for conceptual clustering and association-rule mining. We
believe that formal concept analysis and its extensions can contribute to the
analysis and mining of social networks, text mining, modelling processes, and
political studies, among other fields. The objective of the RuZA workshop was
to bring together researchers and practitioners to discuss the ways FCA can be
used in various applications related to these domains. The workshop program
included an introductory talk ”Towards Efficient, Real-time Pocket Data Mining:
Current Trends and Open Challenges” given by Herna L. Viktor from School of
Electrical Engineering and Computer Science, University of Ottawa, as well as
regular talks followed by a panel discussions. The proceedings of RuZA workshop
include seven papers that were reviewed by at least two reviewers. We would
like to thank all the authors for their contributions and the organizers of RuZA
2015 for their kind support in hosting the workshop. Our warm thanks go also
to the reviewers for their careful review of the submissions and their useful
comments and suggestions. Finally, we would like to thank Russian foundation
for Basic Research (grant no. 14-01-93960) and National Research Foundation
of South Africa (grant no. 92187) for financial support of research collaboration
and organization of the workshop.


December 2015                                               Sergei O. Kuznetsov
                                                              Bruce W. Watson
Program Committee

Jaume Baixeries       The Universitat Politècnica de Catalunya
Arina Britz           CAIR, CSIR and Stellenbosch University, South Africa
Ekaterina Chernyak    National Research University Higher School of
                      Economics, Russia
Bernd Fischer         Stellenbosch University, South Africa
Gillian Greene        Stellenbosch University, South Africa
Dmitry I. Ignatov     National Research University Higher School of
                      Economics, Russia
Dmitry Ilvovsky       Higher School of Economics, Russia
Mehdi Kaytoue         LIRIS – INSA de Lyon, France
Derrick Kourie        Stellenbosch University, South Africa
Sergei O. Kuznetsov   National Research University Higher School of
                      Economics, Russia
Amedeo Napoli         LORIA Nancy, France
Sergei Obiedkov       National Research University Higher School of
                      Economics, Russia
Bruce W. Watson       Stellenbosch University, South Africa




                                   vi
Table of Contents

Visualisation of Russian Newspaper Corpus by Means of Reference Graphs                                                1
   Ekaterina Chernyak and Dmitry Ilvovsky
Browsing Publication Data using Tag Clouds over Formal Concept
Lattices Constructed by Key-Phrase Extraction . . . . . . . . . . . . . . . . . . . . . . .                          10
   Gillian Greene, Marcel Dunaiski, Bernd Fischer, Dmitry Ilvovsky and
   Sergei O. Kuznetsov
Towards a Unified Taxonomy of Biclustering Methods . . . . . . . . . . . . . . . . .                                 23
   Dmitry I. Ignatov and Bruce W. Watson

Formal Concept Analysis Research Toolbox and Failure Deterministic
Finite Automata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    40
   Alexey Neznanov and Derrick Kourie
On Generating a Random Deterministic Finite Automaton as well as
its Failure Equivalent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   47
    Madoda Nxumalo, Derrick G Kourie, Loek Cleophas and Bruce W.
    Watson
Collaborative Conceptual Exploration as a Tool for Crowdsourcing
Domain Ontologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    58
   Sergei Obiedkov and Nikita Romashkin

Full-Text Search in Intermediate Data Storage of FCART . . . . . . . . . . . . . .                                   71
   Andrey Parinov and Alexey Neznanov




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