ITAT (Information Technologies { Applications and Theory) is a traditional Czech-Slovak conference gathering scientists and experts working within a broad scope of computer science. ITAT conference o ers not only a platform for workshops focused on scienti c results of scientists, young researchers and PhD. students, but includes also a possibility to exchange the important ideas, fruitful information, informal communication and discussions among participants. The rst ITAT was organized in Zuberec in 2001. After 12 years of annual conference, in 2013 in Donovaly, several small accompanying workshops were introduced as a part of the conference for the rst time. The popularity of such workshops has grown in the following years and they also started to attract more international submissions. Based on this development, the ITAT steering committee has decided to discontinue the main track of the conference and transform ITAT to the collection of specialized international workshops. This change was symbolically taking place 2019 in Donovaly, where the workshops were introduced for the rst time in 2013. We strongly believe that by focusing on smaller number of areas of interest we are able to secure internationally recognized expert reviewers in workshop areas which, in turn, not only improve the papers under review but also contribute to a higher quality of future papers by ITAT authors, whether submitting again to ITAT workshops or to other international events. Despite its Czech-Slovak origin, due to increased interest, workshop organizers have got the opportunity to open their workshops for participants from other countries as well. This year, the conference ITAT 2020 takes place in Hotel Tyrapol, Oravska Lesna, Slovakia. Due to the actual epidemiological situation, several researchers participate at the conference also online. However, it does not decrease the interest and enthusiasm of researchers, and the quality of submitted and presented contribution. As the main result, we are very delighted that the traditional
Preface Workshop on Computational Intelligence and Data Mining have been complemented by Workshop on Natural Computing, Workshop on Automata, Formal and Natural Languages, and Workshop on Numeration and Substitution Systems. In summary, four international workshops provide an extensive overview of many interesting elds of computer science.
The members of steering committee of the ITAT series of conferences: Peter Gursky, Pavol Jozef Safarik University in Kosice, Slovakia Martin Holena, Czech Academy of Sciences, Czech Republic Tomas Horvath, ELTE University, Budapest, Hungary, and Pavol Jozef Safarik University in Kosice, Slovakia Marketa Lopatkova, Charles University in Prague, Czech Republic Tomas Vinar, Commenius University in Bratislava, Slovakia This year, the organizing committee of ITAT 2020 works in the following format: Peter Gursky, Pavol Jozef Safarik University in Kosice, Slovakia Alexander Szabari, Pavol Jozef Safarik University in Kosice, Slovakia Richard Stana, Pavol Jozef Safarik University in Kosice, Slovakia Lubomir Antoni, Pavol Jozef Safarik University in Kosice, Slovakia We would like to thank the members of steering committee, the members of program committee, the organizers of workshops and conference, the authors, the reviewers, and all the other people who signi cantly contributed to the successful ITAT 2020 conference.
8th International Workshop on Computational Intelligence and Data Mining { WCIDM 2020 (preface) As a part of the workshop bundle ITAT 2020, the 8th international workshop \Computational Intelligence and Data Mining" has been organized. It is aimed at participants with research interests in any of these related areas, especially at PhD students and postdocs. Interested participants were invited to submit a paper in English of up to 8 double-column pages, prepared according to the instructions at the ITAT 2020 web page.
As this workshop started, 7 years ago, it had only 7 regular submissions from 2 countries. However, the interest in the computational intelligence and data mining workshops has been gradually increasing since that time till 2019. This year, due to the di cult pandemic situation, we received one paper less than a year ago { altogether 14 papers from 3 countries.
A key factor in uencing the overall quality of a workshop and of the nal versions of the submitted papers is the workshop's program committee. The 8th international workshop \Computational Intelligence and Data Mining" is grateful to the 30 reviewers from 11 countries who read the submitted papers and have provided competent, and in most cases very detailed, feedback to their authors. Most of them have a great international reputation witnessed by hundreds of WOS citations.
Rafael Gomes Mantovani, Federal Techonology Universitz, Parana
Tomas Krilavicius, Vytautas Magnus University, Kaunas Chandresh Kumar Maurya, Indian Institute of Technology, Roorkee Vera Kurkova, Czech Academy of Sciences, Prague Philippe Lenca, IMT Atlantique, Brest Johannes Lengler, ETH Zurich Antoni Ligeza, AGH University of Science and Technology, Krakow Engelbert Memphu Nguifo, Blaise Pascal University, Clermont-Ferrand Mirko Navara, Czech Technical University, Prague Ostap Okhrin, Technical University of Dresden Tomas Pevny, Czech Technical University, Prague Petr Pos k, Czech Technical University, Prague Jan Rauch, University of Economics, Prague Heike Trautmann, University of Munster Thomas Weise, University of Hefei Tingting Zhang, Mid-Sweden University, Sundsvall Filip Zelezny, Czech Technical University, Prague
Workshop on Natural Computing { WNC 2020 (preface) The Workshop on Natural Computing was organized as a part of the Conference ITAT on September 20{22, 2020, encouraging especially young researchers and PhD students to present their work and exchange ideas in the joint environment of four workshop with inspiring thematic overlaps. Submissions were obtained in the area of natural computing, i.e., computational processes observed in nature, and human-designed computing inspired by nature. Topics included: Cell-inspired computing (membrane computing, P colonies)
Eight regular talks were completed with two invited talks by Alica Kelemenova (Variants of grammar systems - motivations and problems) and Erzsebet Csuhaj-Varju (P Systems: Bio-inspired Computational Models for Complex Systems)
The program committee of WNC 2020:
Ladislav Huraj, University of SS. Cyril and Methodius in Trnava Alica Kelemenova, Silesian University in Opava (co-chair) Alberto Leporati, Universita degli Studi di Milano - Bicocca
Workshop on Automata, Formal and Natural Languages { WAFNL 2020 (Preface) Workshop on Automata, Formal and Natural Languages is an international workshop focused on Automata, Formal Languages, Natural Language Processing and Computational Linguistics. Its main aim is to encourage cooperation among formal language researches and Natural Language Processing researchers in Middle Europe; we therefore also invite Master and Doctoral students of formal languages and computational linguistics to participate. The workshop is part of the ITAT conference. The date of the workshop itself is from September 18th to September 20th, 2020.
The workshop consists of regular papers track, overview and work-in-progress papers track and an open session. A regular paper presents new scienti c results not published elsewhere. Each paper is reviewed by 2 reviewers. Overview papers summarize the research of the author(s) from a higher level of perspective and work-in-progress papers with preliminary results, even negative results papers are welcome here. To further encourage cooperation and sharing of information among automata and Natural Language Processing researchers, we o er an opportunity for anyone to present her/his work, without writing a paper.
We have the invited talk by Friedrich Otto, University of Kassel (25 Years of Restarting Automata: Lots of Results and Open Problems).
The program committee of WAFNL 2020:
Martin Platek (KTIML MFF UK, Praha), main organizer
Frantisek Mraz (KSVI MFF UK, Praha), main organizer
Workshop on Numeration and Substitution Systems { NSS 2020 (Preface) The Workshop on Numeration and Substitution Systems aims to bring together researchers interested in interactions between numeration systems, ergodic theory, number theory and combinatorics. The topics include
Arithmetic algorithms in non-standard numeration systems Transcendence (algebraicity) results related to numeration
The workshop is held on September 18{19, 2020. The researchers from abroad participate also online. Since the workshop had no paper submission procedure, only the titles and the speakers of the presentations discussed during the workshop are included in the proceedings. In total 9 contributions are discussed. Moreover, we have also the invited talk by Francesco Dolce (Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague) called Interval Exchange Transformations: from Symbolic Dynamics to Combinatorics.
The program committee of NSS 2020:
Petr Ambroz (FNSPE, Czech Technical University in Prague)
Tatiana Jajcayova (FMFI, Comenius University in Bratislava) Jan Legersky (FIT, Czech Technical University in Prague) Zuzana Masakova (FNSPE, Czech Technical University in Prague)