{"id":72578,"date":"2021-08-30T18:19:19","date_gmt":"2021-08-30T15:19:19","guid":{"rendered":"https:\/\/azbuki.bg\/?p=72578"},"modified":"2025-09-10T10:20:20","modified_gmt":"2025-09-10T07:20:20","slug":"sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-4-2021-godina-xxx","status":"publish","type":"post","link":"https:\/\/vocedu.azbuki.bg\/en\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-4-2021-godina-xxx\/","title":{"rendered":"Natural Science and Advanced Technology Education, 4\/2021, vol. 30"},"content":{"rendered":"<h4><span style=\"color: #808080;\"><strong>EXPERIMENTS<\/strong><\/span><\/h4>\n<h3>On the Synchronization of Candle Oscillators<\/h3>\n<p><strong>Yavor Yordanov<\/strong><br \/>\n<em>National High School of Mathematics and Science \u2013 Sofia (Bulgaria)<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.53656\/nat2021-4.01\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.53656\/nat2021-4.01<\/a><\/p>\n<p><strong>Abstract.<\/strong> In this study we will investigate an interesting collective behavior of candles. It has been observed that when several candles burn close to each other they form a common flame that exhibits oscillations in size and brightness&#8230;<\/p>\n<h4><a class=\"btn btn-default\" href=\"https:\/\/vocedu.azbuki.bg\/en\/uncategorized\/on-the-synchronization-of-candle-oscillators\/\" target=\"_blank\" rel=\"noopener noreferrer\">SEE MORE<\/a><\/h4>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Analysis of the Liquids Composition by the Sound Produced by Their Heating<\/h3>\n<p><strong>Grigori Matein 1), Asen Pashov 2)<\/strong><br \/>\n<em>1) Atos Quantum (France)<\/em><br \/>\n<em>2) Sofia University \u201cSt. Kliment Ohridski\u201d (Bulgaria)<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.53656\/nat2021-4.02\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.53656\/nat2021-4.02<\/a><\/p>\n<p><strong>Abstract.<\/strong> When a liquid is heated and the power of the heater is high enough (about 1MW\/m2), bubbles are formed at the surface of the heater. Their expansion and collapse are the source of a specific sound, known to everybody who uses a kettle to prepare water for tea or coffee&#8230;<\/p>\n<h4><a class=\"btn btn-default\" href=\"https:\/\/vocedu.azbuki.bg\/en\/uncategorized\/analysis-of-the-liquids-composition-by-the-sound-produced-by-their-heating\/\" target=\"_blank\" rel=\"noopener noreferrer\">SEE MORE<\/a><\/h4>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<h4><span style=\"color: #808080;\"><strong> FROM THE RESEARCH LABORATORIES<\/strong><\/span><\/h4>\n<h3>Calculation method for determining the gas flow rate needed for liquid removal from the bottom of the wellbore<\/h3>\n<p><strong>Hofmann M., AL-Obaidi S.H., Kamensky I.P.<\/strong><br \/>\n<em>Mining Institute \u2013 Saint Petersburg (Russia)<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.53656\/nat2021-4.03\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.53656\/nat2021-4.03<\/a><\/p>\n<p><strong>Abstract.<\/strong> As a result of flooding and accumulations of liquid at the bottomholes, the operating conditions of gas wells become complicated, so that they end up self-squeezing and losing of gas production&#8230;<\/p>\n<p><a class=\"btn btn-default\" href=\"https:\/\/vocedu.azbuki.bg\/en\/uncategorized\/calculation-method-for-determining-the-gas-flow-rate-needed-for-liquid-removal-from-the-bottom-of-the-wellbore\/\" target=\"_blank\" rel=\"noopener noreferrer\">SEE MORE<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<h4><span style=\"color: #808080;\"><strong>CURRICULUM MATTERS<\/strong><\/span><\/h4>\n<h3>Project-Based Teaching in Model for Meaningful and Technological Integration of the Ecological Education<\/h3>\n<p><strong>Claida Doychinova<\/strong><br \/>\n<em>Episkop Konstantin Preslavski Shumen University<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.53656\/nat2021-4.04\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.53656\/nat2021-4.04<\/a><\/p>\n<p><strong>Abstract.<\/strong> Project-based learning (PBL) is a comprehensive strategy for activating students\u2018 cognitive potential. This opens up great opportunities for a personally motivated and constructive process of learning...<\/p>\n<h4><a class=\"btn btn-default\" href=\"https:\/\/vocedu.azbuki.bg\/en\/uncategorized\/proektno-baziranoto-obuchenie-v-model-za-sadarzhatelna-i-tehnologichna-integracziya-v-ekologichnoto-obrazovanie\/\" target=\"_blank\" rel=\"noopener noreferrer\">SEE MORE<\/a><\/h4>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Matriculation Exams In Geography \u2013 From The Most Desired, To The Most Rapidly Avoided<\/h3>\n<p><strong>Ivan Drenovski<\/strong><br \/>\n<em>South-West University \u201eNeofit Rilski\u201c\nBlagoevgrad, Bulgaria<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.53656\/nat2021-4.05\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.53656\/nat2021-4.05<\/a><\/p>\n<p><strong>Abstract.<\/strong> The article provides a retrospective review of the mandatory state matriculation examinations in Bulgarian language and the second elective subject conducted in the period 2008 \u2013 2021...<\/p>\n<h4><a class=\"btn btn-default\" href=\"https:\/\/vocedu.azbuki.bg\/en\/uncategorized\/maturite-po-geografiya-ot-naj-zhelani-do-naj-stremglavo-otbyagvani\/\" target=\"_blank\" rel=\"noopener noreferrer\">SEE MORE<\/a><\/h4>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<h4><span style=\"color: #808080;\"><strong>NEW APPROACHES<\/strong><\/span><\/h4>\n<h3>Introducing High-School And University Students To Practical Astronomy Via Virtual Observatory Tools<\/h3>\n<p><strong>Alexander Kurtenkov<\/strong><br \/>\n<em>Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.53656\/nat2021-4.06\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.53656\/nat2021-4.06<\/a><\/p>\n<p><strong>Abstract.<\/strong> Large-scale astronomical surveys from the last decades have turned the usage of catalogs and archival data into one of the primary skills of contemporary observational astronomers...<\/p>\n<p><a class=\"btn btn-default\" href=\"https:\/\/vocedu.azbuki.bg\/en\/uncategorized\/vavezhdane-na-ucheniczi-i-studenti-v-prakticheskata-astronomiya-posredstvom-instrumenti-na-virtualnata-observatoriya\/\" target=\"_blank\" rel=\"noopener noreferrer\">SEE MORE<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>EXPERIMENTS On the Synchronization of Candle Oscillators Yavor Yordanov National High School of Mathematics and Science \u2013 Sofia (Bulgaria) https:\/\/doi.org\/10.53656\/nat2021-4.01 Abstract. In this study we will investigate an interesting collective behavior of candles. It has been observed that when several candles burn close to each other they form a common flame that exhibits oscillations in [&hellip;]<\/p>","protected":false},"author":124332423427287,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":{"subtitle":"","format":"standard","video":"","gallery":"","source_name":"","source_url":"","via_name":"","via_url":"","override_template":"0","override":[{"single_blog_custom":"","parallax":"0","fullscreen":"0","sidebar":"","second_sidebar":"","sticky_sidebar":"0","share_position":"","share_float_style":"","show_share_counter":"0","show_view_counter":"0","show_featured":"0","show_post_meta":"0","show_post_author":"0","show_post_author_image":"0","show_post_date":"0","post_date_format":"","post_date_format_custom":"","show_post_category":"0","show_post_reading_time":"0","post_reading_time_wpm":"","show_post_tag":"0","show_prev_next_post":"0","show_popup_post":"0","number_popup_post":"1","show_author_box":"0","show_post_related":"0","show_inline_post_related":"0"}],"override_image_size":"0","image_override":[{"single_post_thumbnail_size":"","single_post_gallery_size":""}],"trending_post":"0","trending_post_position":"","trending_post_label":""},"jnews_primary_category":{"id":""}},"categories":[4119],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u0421\u043f. \u201e\u041e\u0431\u0443\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u043f\u0440\u0438\u0440\u043e\u0434\u043d\u0438 \u043d\u0430\u0443\u043a\u0438 \u0438 \u0432\u044a\u0440\u0445\u043e\u0432\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438\u201c, \u043a\u043d\u0438\u0436\u043a\u0430 4\/2021, \u0433\u043e\u0434\u0438\u043d\u0430 XXX - \u0410\u0437-\u0431\u0443\u043a\u0438<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vocedu.azbuki.bg\/chemistry\/sadarzhanie-na-sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-2021\/sp-obuchenie-po-prirodni-nauki-i-varhovi-tehnologii-knizhka-4-2021-godina-xxx\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0421\u043f. \u201e\u041e\u0431\u0443\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u043f\u0440\u0438\u0440\u043e\u0434\u043d\u0438 \u043d\u0430\u0443\u043a\u0438 \u0438 \u0432\u044a\u0440\u0445\u043e\u0432\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438\u201c, \u043a\u043d\u0438\u0436\u043a\u0430 4\/2021, \u0433\u043e\u0434\u0438\u043d\u0430 XXX - \u0410\u0437-\u0431\u0443\u043a\u0438\" \/>\n<meta property=\"og:description\" content=\"EXPERIMENTS On the Synchronization of Candle Oscillators Yavor Yordanov National High School of Mathematics and Science \u2013 Sofia (Bulgaria) https:\/\/doi.org\/10.53656\/nat2021-4.01 Abstract. 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In this study we will investigate an interesting collective behavior of candles. 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