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Dear authors and readers! Dear Colleagues!It's already becoming a tradition to inform our readers with most important achievements of the "Eurasian Physical Technical Journal".Since 2019, Eurasian phys. tech. j. has been indexed in the Scopus database and has a ranking in the SJRplatform (SCImago Journal and Country Rank). We are proud that on the SJR-platform our Journal is included in the Q3 quartile on Energy and Engineering -http://www.scimagojr.com/journalsearch.php?q=211009 20795&tip=sid&clean=0The Open Access "Eurasian Physical Technical Journal status provides free access to published full-text articles in PDF format, in addition to domestic databases of electronic libraries and on the EBSCO website.We also invite you to take part in the work of the 12th International Scientific Conference "Chaos and Structures in Nonlinear Systems. Theory and Experiment", which will be held on June 17-19, 2022 on the basis of the Toraigyrov University (Pavlodar, Kazakhstan). The conference sections:1. Dynamic chaos, self-organization in nonlinear systems, in astrophysics, in condensed environments. 2. Energy, automation and telecommunications.3. Information technologies and methodological problems in the development of modern society and education.4. Innovative technologies, achievements and development prospects in engineering. 5. Ecology and safety in the technosphere: contemporary problems and solutions As part of the conference, it's planned to leave the participants to the picturesque Bayanaul, located on the shore of Lake Sabyndykol. Detailed information is available at https://sci-conf.tou.edu.kz /index.php?lang=rus Publication of articles in Open Access according to the Gold Open Access model means unlimited and free access is available, it's absolutely free of charge for readers and all interested persons. To compensate for the editing, reviewing and publishing processes cost of an author's fee (Open Access Fee) is charged. Payment details are on the site.In this issue, readers can find articles aimed at solving modern topical problems of technical physics. On behalf of the editorial board of the Eurasian Physical and Technical Journal, I express my sincere gratitude to our experts who took the time to review the articles submitted to the journal. Without their highly professional work and patience, this release would not have been possible.We hope that the proposed scientific works will interest our readers. I'll be glad to see you among our authors of the next issues.Best regards, ch. editor, prof. Saule Sakipova