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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="data-paper" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Science and Innovations in Medicine</journal-id><journal-title-group><journal-title xml:lang="en">Science and Innovations in Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Наука и инновации в медицине</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2500-1388</issn><issn publication-format="electronic">2618-754X</issn><publisher><publisher-name xml:lang="en">FSBEI of Higher Education SamSMU of Ministry of Health of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">624827</article-id><article-id pub-id-type="doi">10.35693/SIM624827</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Medical Informatics</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Медицинская информатика</subject></subj-group><subj-group subj-group-type="article-type"><subject>Scientific Report</subject></subj-group></article-categories><title-group><article-title xml:lang="en">A postmortem interval estimation by cranioencephalic thermometry at a single discrete decrease in ambient temperature</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка давности наступления смерти методом краниоэнцефальной термометрии при однократном дискретном понижении внешней температуры</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7380-3766</contrib-id><name-alternatives><name xml:lang="en"><surname>Nedugov</surname><given-names>German V.</given-names></name><name xml:lang="ru"><surname>Недугов</surname><given-names>Герман Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Medicine), Associate professor, Head of the Department of Forensic Medicine</p></bio><bio xml:lang="ru"><p>д-р мед. наук, доцент, заведующий кафедрой судебной медицины</p></bio><email>nedugovh@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Samara State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Самарский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-05-17" publication-format="electronic"><day>17</day><month>05</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-08-24" publication-format="electronic"><day>24</day><month>08</month><year>2025</year></pub-date><volume>10</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>218</fpage><lpage>223</lpage><history><date date-type="received" iso-8601-date="2023-12-19"><day>19</day><month>12</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-03-09"><day>09</day><month>03</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Nedugov G.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Недугов Г.В.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Nedugov G.V.</copyright-holder><copyright-holder xml:lang="ru">Недугов Г.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://innoscience.ru/2500-1388/article/view/624827">https://innoscience.ru/2500-1388/article/view/624827</self-uri><abstract xml:lang="en"><p><bold>Aim</bold> – to develop an estimation method and a computer program for determining the postmortem interval (PMI) by cranioencephalic temperature (CT) of a corpse under conditions of cooling with a single discrete decrease in ambient temperature.</p> <p><bold>Material and methods.</bold> We performed an analytical and finite element modeling of CT dynamics at a single discrete decrease in ambient temperature.</p> <p><bold>Results. </bold>A mathematical model has been developed for determining the PMI and the uncertainty of its estimates at a single discrete decrease in the ambient temperature. The constants' values of the model equation and their variances were determined on the basis of finite element modeling of CT dynamics under the specified cooling conditions. The computational algorithm of the specified method for determining PMI and limitations of its use were implemented in the Warm Bodies DSC program written on C#.</p> <p><bold>Conclusion.</bold> We can recommend using the developed method and software in forensic medicine to determine the PMI at a single discrete decrease in ambient temperature.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель</bold> – разработка реализованного в формате компьютерной программы метода определения ДНС по КТ трупа в условиях его охлаждения при однократном дискретном понижении внешней температуры.</p> <p><bold>Материал и методы.</bold> Выполнено аналитическое и конечно-элементное моделирование динамики КТ при однократном дискретном понижении внешней температуры.</p> <p><bold>Результаты.</bold> Разработана математическая модель определения ДНС и неопределенности ее оценок при однократном дискретном понижении внешней температуры. Значения констант модельного уравнения и их дисперсий определены путем конечно-элементного моделирования динамики КТ в указанных условиях охлаждения. Вычислительный алгоритм данного метода определения ДНС и противопоказания к его применению реализованы на языке C# в виде программы Warm Bodies DSC.</p> <p><bold>Выводы.</bold> Разработанный метод и реализующее его приложение рекомендуются к использованию в судебно-медицинской практике для определения ДНС при однократном дискретном понижении внешней температуры.</p></trans-abstract><kwd-group xml:lang="en"><kwd>corpse cooling</kwd><kwd>postmortem interval</kwd><kwd>cranioencephalic temperature</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>охлаждение трупа</kwd><kwd>давность наступления смерти</kwd><kwd>краниоэнцефальная температура</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Hubig M, Muggenthaler H, Mall G. 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