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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Studies in the History of Science and Technology</journal-id><journal-title-group><journal-title xml:lang="en">Studies in the History of Science and Technology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы истории естествознания и техники</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0205-9606</issn><issn publication-format="electronic">2713-041X</issn><publisher><publisher-name xml:lang="en">Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">686655</article-id><article-id pub-id-type="doi">10.31857/S0205960625020017</article-id><article-id pub-id-type="edn">HVRWID</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>In Commemoration of the 80th Anniversary of the Victory</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>К 80-летию Победы</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Science under Siege: the History of Conferral of the Candidate of Sciences Degree to Ya. Kh. Ioselev</article-title><trans-title-group xml:lang="ru"><trans-title>Наука в блокаде: история присуждения ученой степени кандидата наук Я. Х. Иоселеву</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pryamitsyn</surname><given-names>Vladimir N.</given-names></name><name xml:lang="ru"><surname>Прямицын</surname><given-names>Владимир Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>priamitzynvn@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian Academy of Rocket and Artillery Sciences</institution></aff><aff><institution xml:lang="ru">Российская академия ракетных и артиллерийских наук</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Research Institute (Military History) of the Military Academy of the General Staff of the Armed Forces of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт (военной истории) Военной академии Генерального штаба Вооруженных сил Российской Федерации</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-09-04" publication-format="electronic"><day>04</day><month>09</month><year>2025</year></pub-date><volume>46</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>225</fpage><lpage>234</lpage><history><date date-type="received" iso-8601-date="2025-07-04"><day>04</day><month>07</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-07-04"><day>04</day><month>07</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://gynecology.orscience.ru/0205-9606/article/view/686655">https://gynecology.orscience.ru/0205-9606/article/view/686655</self-uri><abstract xml:lang="en"><p>The article examines the activities of Yakov Khaimovich Ioselev, a Leningrad hydrometeorologist and member of the All-Union Geographical Society, during the Great Patriotic War. Ioselev was called to the Red Army and defended Leningrad as head of the hydrometeorological division of the Leningrad Front Headquarters’ Operations Office. While tackling the problems of hydrometeorological service for the troops, he took the lead, applied scientific approach, and was highly respected by the commanding officers. When tasked with summarizing the hydrometeorological service’s experience, Ioselev’s report turned out to be so informative that it was forwarded to Leningrad State University and defended there as a Candidate of Sciences dissertation. The actual defense took place in the last days of the University’s functioning within the blockade ring, after which it was evacuated to Saratov. Until 2000, Yakov Ioselev’s dissertation was held in classified storage in the Central Archive of the RF Ministry of Defense. This document, which is of significant interest for the historians of the hydrometeorological service and science and for the historians of the defense of Leningrad, has been declassified and is now available to researchers.</p></abstract><trans-abstract xml:lang="ru"><p>В статье рассмотрена деятельность ленинградского ученого-гидрометеоролога, члена Всесоюзного географического общества Я. Х. Иоселева в годы Великой Отечественной войны. Он был мобилизован в Красную армию и защищал Ленинград в должности начальника гидрометеорологического отделения оперативного отдела штаба Ленинградского фронта. При решении задач гидрометеорологического обеспечения войск ученый проявлял инициативу, применял научный подход, пользовался высоким авторитетом командования. Ему была поставлена задача обобщить опыт работы гидрометслужбы. Отчет Иоселева получился столь содержательным, что был направлен в Ленинградский государственный университет и защищен там в качестве кандидатской диссертации. Примечательно, что защита состоялась в последние дни нахождения учебного заведения в кольце блокады, после чего оно было эвакуировано в Саратов. До 2000 г. диссертация Иоселева находилась на секретном хранении в Центральном архиве Министерства обороны Российской Федерации. Теперь этот документ, представляющий существенный интерес для историков гидрометеорологической службы и науки, а также историков обороны Ленинграда, рассекречен и доступен исследователям.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hydrometeorology</kwd><kwd>Leningrad</kwd><kwd>siege</kwd><kwd>dissertation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гидрометеорология</kwd><kwd>Ленинград</kwd><kwd>блокада</kwd><kwd>диссертация</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Baidin, S. S. (ed.) (1965) Gidrologiia ust’evoi oblasti Nevy [Hydrology of the Neva Estuary Area]. 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