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RSS is used to publish periodically updated content, e.g. articles of monthly journal. To gather information from RSS you need client or web based RSS-aggregator. You can use Feedly, NewsBlur or see the list of popular aggregators.
RSS feed of the selected topics
https://ufn.ru/en/articles/rss.xml
Select topics you interested in, copy link to the RSS feed, and insert it into your RSS aggregator.