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<doi_batch xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.crossref.org/schema/5.3.1" xmlns:jats="http://www.ncbi.nlm.nih.gov/JATS1" xmlns:fr="http://www.crossref.org/fundref.xsd" xmlns:ai="http://www.crossref.org/AccessIndicators.xsd" version="5.3.1"><head><doi_batch_id>NONE</doi_batch_id><timestamp>20260606195116286</timestamp><depositor><depositor_name>Immanuel Kant Baltic Federal University</depositor_name><email_address>no-reply@journals.kantiana.ru</email_address></depositor><registrant>Immanuel Kant Baltic Federal University</registrant></head><body><journal><journal_metadata><full_title>IKBFU's Vestnik. Series: Natural Sciences</full_title><issn media_type="print">2500-3208</issn></journal_metadata><journal_issue><publication_date media_type="print"><month>06</month><day>06</day><year>2026</year></publication_date><journal_volume><volume>1</volume></journal_volume><issue>1</issue></journal_issue><journal_article publication_type="full_text"><titles><title>Geography of knowledge: clus­te­ring national competence centres of Russia</title></titles><contributors><person_name sequence="first" contributor_role="author"><given_name>A. S.</given_name><surname>Mikhaylov</surname></person_name><person_name sequence="additional" contributor_role="author"><given_name>A. A.</given_name><surname>Mikhaylova</surname></person_name><person_name sequence="additional" contributor_role="author"><given_name>D. 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I.</given_name><surname>Sturman</surname></person_name></contributors><jats:abstract><jats:p>Artificial electromagnetic fields are a byproduct of the electrical or elec­tronic devices as an inevitable consequence of the modern scientific and tech­nical progress, and at the same time poorly studied environmental impact fac­tor. Research of current levels and spatial distribution of electromagnetic fields in Kaliningrad aimed at mapping, defining statistically significant characteristics for types of land use and building types, revealing abnormal areas and their correspondence to hygienic standards and levels safety. The conducted research of electromagnetic fields of industrial frequency has shown that intensity of electric fields in the central part of Kaliningrad reaches con­siderable values only in immediate proximity to a high-voltage line. Magnetic fields of industrial frequency are extended everywhere and extremely uneven­ly that has been presented in the original map. 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