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The article focuses on the study of peculiarities of valuable marks for perception of male in the phraseological picture of the world in Modern German with the purpose of optimizing of the intercultural space. The social role of male in German lingual and cultural space is formed by history, traditions, ethnical characteristics. The specificity of the perception of male by the German language personality in the phraseological picture of the world on the semantic and pragmatic levels is analyzed. The national and cultural specificity of the German phraseology is discovered through the associative perception, informative and semiotic fillings within diachronic and synchronic analyses. In Modern German the sociocultural construct Mann clarifies the concept and value of male character and combines the intellectual, the spiritual and the strong lines and the ethnical characteristics of male in its demonstration and perception. The component Mann is a marker of the logic conceptualization of model of the German language personality in the intercultural communication in the categories lingual and cultural, social and individual, national and universal. The forming of national and cultural specificity of the phraseological units with the component Mann is based on the background knowledge which is in memory of lingual and cultural society. They document the historical, cultural, social and political experience of the native speakers. The connotative features are explicated in the phraseological units with Mann. They expose the stereotyping about the male regarding to the female, job, alcohols, power and free space. The dynamic side of his character is a form of demonstration of cognitive and emotive components through such elements: shyness, self-determination, indetermination, self-sufficiency, complacency, masculinity. The secondary nomination comes with identical gender and relevant using of component for ironic denotation of age and gender. The forming of cognitive model of sociocultural construct unifies its role in the cognitive picture of the world of the lingual and cultural society. References 1. Alimuradov, O. A., and Karatyshova, M. A. 2010. Krasota v yazyke: gendernyi i pragmalingvisticheskii analiz komplimentarnogo rechevogo povedeniia. Pyatigorsk: SNEG. 2. Velyka, I. O. 2009. "Henderni stereotypy v otsinnykh maskulinnykh nominatsiiakh (na materiali nimetskoi movy). Studia Linguistica, 3: 40–48. 3. Zubach, O., and Kozak, S. 2016. "Ekonomichni realii v suchasnii nimetskomovnii kartyni svitu". Naukovyi visnyk SNU im. Lesi Ukrainky. Ser. Filolohichni nauky, 5(330): 185–188. 4. Zubach, Oksana, and Adzhabi, Yassine, Zastrovskyi Oleksandr. 2017. "Nimetska movna osobystist u frazeolohichnii kartyni svitu". Naukovyi visnyk SNU im. Lesi Ukrainky. Ser. Filolohichni nauky, 3(352): 178–181. 5. Lozytska, Mariia. 2016. "Natsionalno-kulturna spetsyfika latentnoho vyrazhennia henderu v suchasnii nimetskii frazeolohii". Scientific and Practical Results in 2016. Prospects for Their Development. Paper presented at International Scientific and Practical Conference "World Science" (Proceedings of the III International Scientific and Practical Conference, Abu-Dhabi, UAE, December 27–28, 1(5): 14–18. 6. Martyniuk, Alla P. 2005. "Konstruirovaniye gendera v diskurse". Diskur kak kognitivno-kommunikativnyy fenomen, 334–350. Kharkov: Konstanta. 7. Fisiak, Iryna S. 2012. "Komunikatyvni stratehii vzhyvannia frazeolohichnykh odynyts na poznachennia mizhosobystisnykh vidnosyn: (na materiali nim. movy)". Naukovyi visnyk Volynskoho natsionalnoho universytetu imeni Lesi Ukrainky, 6(231): 130–133. 8. Duden. 2002. 11. Redewendungen. 2., neu bearb. u. aktual. Auflage. Mannheim, Leipzig, Wien, Zürich: Dudenverlag. 9. Duden. 2002. 12. Zitate und Aussprüche. 2., neu bearb. u. aktuel. Auflage. Mannheim, Leipzig, Wien, Zürich: Dudenverlag. ; Стаття присвячена вивченню особливостей ціннісних орієнтирів сприйняття чоловічої статі у фразеологічній картині світу сучасної німецької мови з метою оптимізації міжкультурного простору. Соціальна роль чоловіка в німецькому лінгвокультурному просторі формувалась історією, традиціями, національними рисами. Проаналізовано особливості усвідомлення німецькою мовною особистістю чоловічої статі у фразеологічній картині світу на семантичному та прагматичному рівнях. Національно-культурна специфіка німецької фразеології прослідковується крізь призму асоціативного сприйняття, інформативного та семіотичного наповнення з позицій діахронного та синхронного аналізів. У сучасній німецькій мові соціокультурний конструкт Mann розкриває поняття та цінність образу чоловічої статі та поєднує інтелектуальні, духовні й вольові риси національного характеру чоловіка в його проявах та сприйняттях. Компонент Mann є маркером логічної концептуалізації моделі німецької мовної особистості у міжкультурній комунікації в категоріях: мовне та культурне, соціальне та індивідуальне, загальнонаціональне та універсальне. Формування національно-культурної специфіки фразеологічних одиниць із компонентом Mann ґрунтується на фонових знаннях, які закарбувались у пам'яті лінгвокультурної спільноти та фіксують історичний, культурний, соціальний та політичний досвід носіїв мови. Конотативні особливості експлікуються у фразеологізмах з компонентом Mann, які висвітлюють стереотипне уявлення про чоловіка у ставленні до жінок, праці, алкоголю, влади, вільного простору тощо. Динамічна сторона його характеру є формою прояву когнітивного та емотивного компонентів, які містять такі елементи: боязкість, рішучість/нерішучість, самовдоволення, самовпевненість, енергійність тощо. Вторинна номінація сприяє тотожному гендерно релевантному вживанню компонента для іронічного позначення вікових та статевих особливостей. Становлення когнітивної моделі соціокультурного конструкта Mann уніфікує його роль у когнітивній картині світу лінгвокультурної спільноти. Джерела та література 1. Алимурадов О. А. Красота в языке: гедерный и прагмалингвистический анализ комплиментарного речевого поведения / О. А. Алимурадов, М. А. Каратышова. – Пятигорск : СНЕГ, 2010. – 140 с. 2. Велика І. О. Ґендерні стереотипи в оцінних маскулінних номінаціях (на матеріалі німецької мови) / І. О. Велика // Studia Linguistica. – Київ, 2009. – Вип. 3. – С. 40–48. 3. Зубач О. Економічні реалії в сучасній німецькомовній картині світу / О. Зубач, С. Козак // Науковий вісник СНУ ім. Лесі Українки. Сер. Філологічні науки. – Луцьк, 2016. – № 5 (330). – С. 185–188. 4. Зубач О. Німецька мовна особистість у фразеологічній картині світу / О. Зубач, Я. Аджабі, О. Застровський // Науковий вісник СНУ ім. Лесі Українки. Сер. Філологічні науки. – Луцьк, 2017. – № 3(352). – С. 178–181. 5. Лозицька М. П. Національно-культурна специфіка латентного вираження гендеру в сучасній німецькій фразеології / М. П. Лозицька // International Scientific and Practical Conference "World Science" (Proceedings of the III International Scientific and Practical Conference "Scientific and Practical Results in 2016. Prospects for Their Development" (December 27 – 28, 2016, Abu-Dhabi, UAE)). – January 2017. – № 1(17). – Vol. 5. – P. 14–18. 6. Мартынюк А. П. Конструирование гендера в дискурсе / А. П. Мартынюк // Дискур как когнитивно-коммуникативный феномен / [Под общ. Ред. И. С. Шевченко]. – Харьков Константа, 2005. – С. 334–350. 7. Фісяк І. С. Комунікативні стратегії вживання фразеологічних одиниць на позначення міжособистісних відносин : (на матеріалі нім. мови) / Е.С. Фісяк // Науковий вісник Волинського національного університету імені Лесі Українки. – Луцьк, 2012. – №6 (231). – С. 130–133. 8. Duden 11. Redewendungen. 2., neu bearb. u. aktual. Auflage / Duden 11. – Mannheim. Leipzig. Wien. Zürich : Dudenverlag, 2002. – 955 S. 9. Duden. 12. Zitate und Aussprüche. 2., neu bearb. u. aktuel. Auflage / Duden 12. – Mannheim. Leipzig. Wien. Zürich: Dudenverlag, 2002. – 960 S.

We report on long-term multiwavelength monitoring of blazar Mrk 421 by the GLAST-AGILE Support Program of the Whole Earth Blazar Telescope (GASP-WEBT) collaboration and Steward Observatory, and by the Swift and Fermi satellites. We study the source behaviour in the period 2007-2015, characterized by several extreme flares. The ratio between the optical, X-ray and γ-ray fluxes is very variable. The γ-ray flux variations show a fair correlation with the optical ones starting from 2012. We analyse spectropolarimetric data and find wavelength-dependence of the polarization degree (P), which is compatible with the presence of the host galaxy, and no wavelength dependence of the electric vector polarization angle (EVPA). Optical polarimetry shows a lack of simple correlation between P and flux and wide rotations of the EVPA. We build broad-band spectral energy distributions with simultaneous near-infrared and optical data from the GASP-WEBT and ultraviolet and X-ray data from the Swift satellite. They show strong variability in both flux and X-ray spectral shape and suggest a shift of the synchrotron peak up to a factor of ~50 in frequency. The interpretation of the flux and spectral variability is compatible with jet models including at least two emitting regions that can change their orientation with respect to the line of sight.© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. ; The Abastumani team acknowledges financial support by Shota Rustaveli NSF under contract FR/577/6-320/13. The research at BU was supported in part by US National Science Foundation grant AST-1615796 and NASA Fermi Guest Investigator grant NNX14AQ58G. This study makes use of 43 GHz VLBA data from the VLBA-BU Blazar Monitoring Program (VLBA-BUBLAZAR; http://www.bu.edu/blazars/VLBAproject.html), funded by NASA through the Fermi Guest Investigator Program. The PRISM camera at the Lowell Observatory was developed by K. Janes et al. at the BU and Lowell Observatory, with funding from the NSF, BU and Lowell Observatory. This research has made use of data from the MOJAVE data base, which is maintained by the MOJAVE team (Lister et al. 2009). The St. Petersburg University team acknowledges support from Russian RFBR grant 15-02-00949 and St. Petersburg University research grant 6.38.335.2015. This paper is partly based on observations carried out at the German Spanish Calar Alto Observatory, which is jointly operated by the MPIA and the IAA-CSIC. IA research is supported by a Ramon y Cajal grant of the Spanish Ministerio de Economia y Competitividad (MINECO). Acquisition of the MAPCAT data was supported in part by MINECO through grants AYA2010-14844, AYA2013-40825-P and AYA2016-80889-P, and by the Regional Government of Andalucia through grant P09-FQM-4784. This research was partially supported by the Scientific Research Fund of the Bulgarian Ministry of Education and Sciences under grants DO 02-137 (BIn-13/09) and DN 08/1. The Skinakas Observatory is a collaborative project of the University of Crete, the Foundation for Research and Technology - Hellas and the Max-Planck-Institut fur Extrater-restrische Physik. GD and OV gratefully acknowledge the observing grant support from the Institute of Astronomy and Rozhen National Astronomical Observatory, Bulgaria Academy of Sciences, via the bilateral joint research project 'Observations of ICRF radio-sources visible in optical domain' (the head is Dr G. Damljanovic). This work is a part of the Projects No 176011 ('Dynamics and kinematics of celestial bodies and systems'), No 176004 ('Stellar physics') and No 176021 ('Visible and invisible matter in nearby galaxies: theory and observations') supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia. The Serbian station is the Astronomical Station Vidojevica (ASV) with the 60-cm ASV telescope (and from this year, the 1.4-m ASV one). This research was supported partly by funds of the project RD-08-81 of the Shumen University. ; Peer Reviewed

This issue of the journal "History of Science and Technology" has been prepared in difficult conditions. In difficult conditions for authors… In difficult conditions for reviewers . In difficult conditions for the editorial board… In difficult conditions for the whole world in general!!! This issue contains ten articles. The first of these articles came in late 2019, when the world did not know yet these terrible words: Corona virus disease 2019 (COVID-19); severe acute respiratory syndrome Corona virus 2 (SARS-CoV-2)… COVID-19 was first identified in December 2019 in Wuhan, China, and has since spread worldwide, resulting in an ongoing pandemic. As on May 29, 2020, when these lines were written, more than 5800000 cases were recorded in 188 countries, killing more than 359000 people. We hope that humanity will invent a vaccine as soon as possible, and these horrific death statistics will first stop growing and then stop altogether. For this, many events and activities are important, as history shows. Including the history of the development of science and technology, that is the subject area of our publication. In many sources on the history of electric power production the evolution of electric power production was studied both in developed and developing countries and its impact on economy. The growing demand for electric power became the most problem that stood before the power sector of Ghana. This issue begins with an article examining activities that in many ways helped to create a sustainable electricity supply for households and industries in Ghana, especially in the cities of Accra and Kumasi, between 1900 and 1960. Scientific-technical borrowings are one of those types of scientific support for the work of industrial sectors, whose role in the conditions of exiting the crisis to acquiring the particular importance. Since the mid-1920s, they have become the main way of scientific support for the organization of the development of Ukrainian electric machine-building industry in the context of large-scale electrification of the country. That was due to the need for a quick withdrawal of this industry from the previous crisis in the absence in the Ukrainian SSR of its own scientific support system for the electric machine engineering. An example of this measure, which was considered in the study, was an attempt to achieve the fastest possible increase in productivity of the Kharkiv Electromechanical Plant at minimal financial cost. The next article analyzes the activities of the mining industry in the south of the Russian Empire, of which Ukraine was a part of that time. An analysis of the so-called "coal crisis" and the role of large miners in collusion has been made. Market monopolization has been considered. Emphasis is made on the customs policy of the tsarist government, speculation on temporary fuel difficulties. The study shows that in the last quarter of the nineteenth century there was a consolidation and monopolization of the mining industry in the south of the Russian Empire. In the 21st century, every reputable journal also has an online version, which makes the dissemination of scientific information almost instantaneous. We are so accustomed to the conveniences of the information age that it is difficult for us to imagine the difficulties that scientists faced a little over 150 years ago. The genesis of science launched the process of forming branch of scientific communities and demanded stable ways of communication for productive and effective development of the branch. Scientific journals have become an ideal means of disseminating information, and a scientific article has been transformed from an ordinary letter into a modern form and has taken on an ideal form. The importance of international communication between scientists, on the example of consideration of the activities of Valerian Mykolaiovych Lihin, is discussed in the following study. He became the first Russian-speaking member of one of the oldest Mathematical Societies in Europe - the French. V. Lihin broke the tradition of "isolated" science when discoveries in the Russian Empire (and later in the USSR) were made separately from the rest of the world. In the next article an attempt to investigate in a chronological order the historical circumstances on the formation and development of the mainline electric locomotives engineering at the Luhansk diesel locomotives engineering plant (1957–2014) has been made. Historical and biographical research is continued by the article, which considers the factors shaping the scientific worldview of Mykola Pavlovych Petrov - an outstanding scientist and engineer against the background of his initiative and organizational efforts to develop the domestic scientific and technical space of the late nineteenth - early twentieth The article devoted to highlighting the contribution of academician Mariia Vasylivna Pavlova (Gortynska) in the development of palaeozoology science at the end of the XIX – the first third of the XX centuries continues the cycle of historical and biographical researches. We hope that our readers will be interested in scientific work, examining the research of Russian women in the field of human genetics in 1920-1930. The main task of the article was to determine the contribution of women scientists to the development of different fields of human genetics. Particular attention was given to reconstructing women's geneticists' research work, reviewing the content of their publications, and analyzing the theoretical and methodological approaches they employed in solving various scientific problems. In the history of Ukrainian archeology, there are many names of outstanding researchers who have devoted their lives to the study of our antiquity. Among them is Yulian Kulakovskyi, a well-known domestic historian and archeologist. In 1883 Yu. A. Kulakovskyi joined the Nestor Chronicler Historical Society. Since that time, his life and career have been closely linked to this scientific union. The analysis of the results of researches in the field of late antique archeology of the Crimea, published on the pages of "Readings of the Historical Society of Nestor the Chronicler", is discussed in the next article. The development of the spread of COVID-19 shows that in the fight against it in the first place are such measures and actions as unrestricted access to information on methods of combating the spread of the virus; exchange of data at the international level on treatment methods of the disease; communication between scientists from different countries; timely quarantine measures, etc. In this sense, it is important to study the historical experience of mankind in the fight against pandemics. This issue of the journal History of Science and Technology concludes with an article on a critical analysis of nineteenth-century military interventions as the main cause of the spread of infectious diseases internationally. Emerging problems and solutions obtained as a result of a critical analysis of the materials of the International Sanitary Conferences reveal the history of the spread of infectious diseases and the methods of early statistics used for epidemiological purposes. Concluding this Preface, we emphasize once again the importance of a comprehensive study of international historical experience in the development of science and technology. Not limited to any one field or field of science, we are ready to provide the pages of our journal for the opportunity to exchange views with the international scientific community. Let peace and health be with everyone in these hard times! ; This issue of the journal "History of Science and Technology" has been prepared in difficult conditions. In difficult conditions for authors… In difficult conditions for reviewers . In difficult conditions for the editorial board… In difficult conditions for the whole world in general!!! This issue contains ten articles. The first of these articles came in late 2019, when the world did not know yet these terrible words: Corona virus disease 2019 (COVID-19); severe acute respiratory syndrome Corona virus 2 (SARS-CoV-2)… COVID-19 was first identified in December 2019 in Wuhan, China, and has since spread worldwide, resulting in an ongoing pandemic. As on May 29, 2020, when these lines were written, more than 5800000 cases were recorded in 188 countries, killing more than 359000 people. We hope that humanity will invent a vaccine as soon as possible, and these horrific death statistics will first stop growing and then stop altogether. For this, many events and activities are important, as history shows. Including the history of the development of science and technology, that is the subject area of our publication. In many sources on the history of electric power production the evolution of electric power production was studied both in developed and developing countries and its impact on economy. The growing demand for electric power became the most problem that stood before the power sector of Ghana. This issue begins with an article examining activities that in many ways helped to create a sustainable electricity supply for households and industries in Ghana, especially in the cities of Accra and Kumasi, between 1900 and 1960. Scientific-technical borrowings are one of those types of scientific support for the work of industrial sectors, whose role in the conditions of exiting the crisis to acquiring the particular importance. Since the mid-1920s, they have become the main way of scientific support for the organization of the development of Ukrainian electric machine-building industry in the context of large-scale electrification of the country. That was due to the need for a quick withdrawal of this industry from the previous crisis in the absence in the Ukrainian SSR of its own scientific support system for the electric machine engineering. An example of this measure, which was considered in the study, was an attempt to achieve the fastest possible increase in productivity of the Kharkiv Electromechanical Plant at minimal financial cost. The next article analyzes the activities of the mining industry in the south of the Russian Empire, of which Ukraine was a part of that time. An analysis of the so-called "coal crisis" and the role of large miners in collusion has been made. Market monopolization has been considered. Emphasis is made on the customs policy of the tsarist government, speculation on temporary fuel difficulties. The study shows that in the last quarter of the nineteenth century there was a consolidation and monopolization of the mining industry in the south of the Russian Empire. In the 21st century, every reputable journal also has an online version, which makes the dissemination of scientific information almost instantaneous. We are so accustomed to the conveniences of the information age that it is difficult for us to imagine the difficulties that scientists faced a little over 150 years ago. The genesis of science launched the process of forming branch of scientific communities and demanded stable ways of communication for productive and effective development of the branch. Scientific journals have become an ideal means of disseminating information, and a scientific article has been transformed from an ordinary letter into a modern form and has taken on an ideal form. The importance of international communication between scientists, on the example of consideration of the activities of Valerian Mykolaiovych Lihin, is discussed in the following study. He became the first Russian-speaking member of one of the oldest Mathematical Societies in Europe - the French. V. Lihin broke the tradition of "isolated" science when discoveries in the Russian Empire (and later in the USSR) were made separately from the rest of the world. In the next article an attempt to investigate in a chronological order the historical circumstances on the formation and development of the mainline electric locomotives engineering at the Luhansk diesel locomotives engineering plant (1957–2014) has been made. Historical and biographical research is continued by the article, which considers the factors shaping the scientific worldview of Mykola Pavlovych Petrov - an outstanding scientist and engineer against the background of his initiative and organizational efforts to develop the domestic scientific and technical space of the late nineteenth - early twentieth The article devoted to highlighting the contribution of academician Mariia Vasylivna Pavlova (Gortynska) in the development of palaeozoology science at the end of the XIX – the first third of the XX centuries continues the cycle of historical and biographical researches. We hope that our readers will be interested in scientific work, examining the research of Russian women in the field of human genetics in 1920-1930. The main task of the article was to determine the contribution of women scientists to the development of different fields of human genetics. Particular attention was given to reconstructing women's geneticists' research work, reviewing the content of their publications, and analyzing the theoretical and methodological approaches they employed in solving various scientific problems. In the history of Ukrainian archeology, there are many names of outstanding researchers who have devoted their lives to the study of our antiquity. Among them is Yulian Kulakovskyi, a well-known domestic historian and archeologist. In 1883 Yu. A. Kulakovskyi joined the Nestor Chronicler Historical Society. Since that time, his life and career have been closely linked to this scientific union. The analysis of the results of researches in the field of late antique archeology of the Crimea, published on the pages of "Readings of the Historical Society of Nestor the Chronicler", is discussed in the next article. The development of the spread of COVID-19 shows that in the fight against it in the first place are such measures and actions as unrestricted access to information on methods of combating the spread of the virus; exchange of data at the international level on treatment methods of the disease; communication between scientists from different countries; timely quarantine measures, etc. In this sense, it is important to study the historical experience of mankind in the fight against pandemics. This issue of the journal History of Science and Technology concludes with an article on a critical analysis of nineteenth-century military interventions as the main cause of the spread of infectious diseases internationally. Emerging problems and solutions obtained as a result of a critical analysis of the materials of the International Sanitary Conferences reveal the history of the spread of infectious diseases and the methods of early statistics used for epidemiological purposes. Concluding this Preface, we emphasize once again the importance of a comprehensive study of international historical experience in the development of science and technology. Not limited to any one field or field of science, we are ready to provide the pages of our journal for the opportunity to exchange views with the international scientific community. Let peace and health be with everyone in these hard times! ; This issue of the journal "History of Science and Technology" has been prepared in difficult conditions. In difficult conditions for authors… In difficult conditions for reviewers . In difficult conditions for the editorial board… In difficult conditions for the whole world in general!!! This issue contains ten articles. The first of these articles came in late 2019, when the world did not know yet these terrible words: Corona virus disease 2019 (COVID-19); severe acute respiratory syndrome Corona virus 2 (SARS-CoV-2)… COVID-19 was first identified in December 2019 in Wuhan, China, and has since spread worldwide, resulting in an ongoing pandemic. As on May 29, 2020, when these lines were written, more than 5800000 cases were recorded in 188 countries, killing more than 359000 people. We hope that humanity will invent a vaccine as soon as possible, and these horrific death statistics will first stop growing and then stop altogether. For this, many events and activities are important, as history shows. Including the history of the development of science and technology, that is the subject area of our publication. In many sources on the history of electric power production the evolution of electric power production was studied both in developed and developing countries and its impact on economy. The growing demand for electric power became the most problem that stood before the power sector of Ghana. This issue begins with an article examining activities that in many ways helped to create a sustainable electricity supply for households and industries in Ghana, especially in the cities of Accra and Kumasi, between 1900 and 1960. Scientific-technical borrowings are one of those types of scientific support for the work of industrial sectors, whose role in the conditions of exiting the crisis to acquiring the particular importance. Since the mid-1920s, they have become the main way of scientific support for the organization of the development of Ukrainian electric machine-building industry in the context of large-scale electrification of the country. That was due to the need for a quick withdrawal of this industry from the previous crisis in the absence in the Ukrainian SSR of its own scientific support system for the electric machine engineering. An example of this measure, which was considered in the study, was an attempt to achieve the fastest possible increase in productivity of the Kharkiv Electromechanical Plant at minimal financial cost. The next article analyzes the activities of the mining industry in the south of the Russian Empire, of which Ukraine was a part of that time. An analysis of the so-called "coal crisis" and the role of large miners in collusion has been made. Market monopolization has been considered. Emphasis is made on the customs policy of the tsarist government, speculation on temporary fuel difficulties. The study shows that in the last quarter of the nineteenth century there was a consolidation and monopolization of the mining industry in the south of the Russian Empire. In the 21st century, every reputable journal also has an online version, which makes the dissemination of scientific information almost instantaneous. We are so accustomed to the conveniences of the information age that it is difficult for us to imagine the difficulties that scientists faced a little over 150 years ago. The genesis of science launched the process of forming branch of scientific communities and demanded stable ways of communication for productive and effective development of the branch. Scientific journals have become an ideal means of disseminating information, and a scientific article has been transformed from an ordinary letter into a modern form and has taken on an ideal form. The importance of international communication between scientists, on the example of consideration of the activities of Valerian Mykolaiovych Lihin, is discussed in the following study. He became the first Russian-speaking member of one of the oldest Mathematical Societies in Europe - the French. V. Lihin broke the tradition of "isolated" science when discoveries in the Russian Empire (and later in the USSR) were made separately from the rest of the world. In the next article an attempt to investigate in a chronological order the historical circumstances on the formation and development of the mainline electric locomotives engineering at the Luhansk diesel locomotives engineering plant (1957–2014) has been made. Historical and biographical research is continued by the article, which considers the factors shaping the scientific worldview of Mykola Pavlovych Petrov - an outstanding scientist and engineer against the background of his initiative and organizational efforts to develop the domestic scientific and technical space of the late nineteenth - early twentieth The article devoted to highlighting the contribution of academician Mariia Vasylivna Pavlova (Gortynska) in the development of palaeozoology science at the end of the XIX – the first third of the XX centuries continues the cycle of historical and biographical researches. We hope that our readers will be interested in scientific work, examining the research of Russian women in the field of human genetics in 1920-1930. The main task of the article was to determine the contribution of women scientists to the development of different fields of human genetics. Particular attention was given to reconstructing women's geneticists' research work, reviewing the content of their publications, and analyzing the theoretical and methodological approaches they employed in solving various scientific problems. In the history of Ukrainian archeology, there are many names of outstanding researchers who have devoted their lives to the study of our antiquity. Among them is Yulian Kulakovskyi, a well-known domestic historian and archeologist. In 1883 Yu. A. Kulakovskyi joined the Nestor Chronicler Historical Society. Since that time, his life and career have been closely linked to this scientific union. The analysis of the results of researches in the field of late antique archeology of the Crimea, published on the pages of "Readings of the Historical Society of Nestor the Chronicler", is discussed in the next article. The development of the spread of COVID-19 shows that in the fight against it in the first place are such measures and actions as unrestricted access to information on methods of combating the spread of the virus; exchange of data at the international level on treatment methods of the disease; communication between scientists from different countries; timely quarantine measures, etc. In this sense, it is important to study the historical experience of mankind in the fight against pandemics. This issue of the journal History of Science and Technology concludes with an article on a critical analysis of nineteenth-century military interventions as the main cause of the spread of infectious diseases internationally. Emerging problems and solutions obtained as a result of a critical analysis of the materials of the International Sanitary Conferences reveal the history of the spread of infectious diseases and the methods of early statistics used for epidemiological purposes. Concluding this Preface, we emphasize once again the importance of a comprehensive study of international historical experience in the development of science and technology. Not limited to any one field or field of science, we are ready to provide the pages of our journal for the opportunity to exchange views with the international scientific community. Let peace and health be with everyone in these hard times!

We present a multiwavelength study of the flat-spectrum radio quasar CTA 102 during 2013-2017. We use radio-to-optical data obtained by the Whole Earth Blazar Telescope, 15 GHz data from the Owens Valley Radio Observatory, 91 and 103 GHz data from the Atacama Large Millimeter Array, near-infrared data from the Rapid Eye Monitor telescope, as well as data from the Swift (optical-UV and X-rays) and Fermi (γ -rays) satellites to study flux and spectral variability and the correlation between flux changes at different wavelengths. Unprecedented γ -ray flaring activity was observed during 2016 November-2017 February, with four major outbursts. A peak flux of (2158 ± 63) × 10−8 ph cm−2 s−1, corresponding to a luminosity of (2.2 ± 0.1) × 1050 erg s−1, was reached on 2016 December 28. These four γ -ray outbursts have corresponding events in the near-infrared, optical, and UV bands, with the peaks observed at the same time. A general agreement between X-ray and γ -ray activity is found. The γ -ray flux variations show a general, strong correlation with the optical ones with no time lag between the two bands and a comparable variability amplitude. This γ -ray/optical relationship is in agreement with the geometrical model that has successfully explained the low-energy flux and spectral behaviour, suggesting that the long-term flux variations are mainly due to changes in the Doppler factor produced by variations of the viewing angle of the emitting regions. The difference in behaviour between radio and higher energy emission would be ascribed to different viewing angles of the jet regions producing their emission. © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society ; The data collected by the WEBT collaboration are stored in the WEBT archive at the Osservatorio Astrofisico di Torino INAF (http://www.oato.inaf.it/blazars/webt/); for questions regarding their availability, contact the WEBT President Massimo Villata(massimo.villata@inaf.it).We acknowledge financial contribution from the agreementASI-INAFn. 2017-14-H.0 and from the contract PRIN-SKA-CTA-INAF 2016. This research was partially supported by the Bulgarian National Science Fund of the Ministry of Education and Science under grants DN 08-1/2016, DN 18-13/2017, and KP-06-H28/3 (2018). The Skinakas Observatory is a collaborative project of the University of Crete, the Foundation for Research and Technology -Hellas, and the Max-Planck-Institut fur Extraterrestrische Physik. The Abastumani team acknowledges financial support by the Shota Rustaveli National Science Foundation under contract FR/217554/16. The St. Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. GD and OV gratefully acknowledge the observing grant support from the Institute of Astronomy and Rozhen National Astronomical Observatory, Bulgarian Academy of Sciences, via bilateral joint research project 'Study of ICRF radio-sources and fast variable astronomical objects' (head -G.Damljanovic). This work is a part of the Projects No. 176011 ('Dynamics and Kinematics of Celestial Bodies and Systems'), No. 176004 ('Stellar Physics'), and No. 176021 ('Visible and Invisible Matter in Nearby Galaxies: Theory and Observations') supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia. JE is indebted to DGAPA (Universidad Nacional Autonoma de M ' exico) for financial support, PAPIIT project IN114917. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. Data from the Steward Observatory blazar monitoring project were used. This program is supported by NASA/Fermi Guest Investigator grants NNX12AO93G and NNX15AU81G. We acknowledge support by Bulgarian National Science Programme 'Young Scientists and Postdoctoral Students 2019', Bulgarian National Science Fund under grant DN18-10/2017 and National RI Roadmap Projects DO1-157/28.08.2018 and DO1-153/28.08.2018 of the Ministry of Education and Science of the Republic of Bulgaria. This publication makes use of data obtained at Mets ahovi Radio Observatory, operated by Aalto University in Finland. The Astronomical Observatory of the Autonomous Region of theAostaValley (OAVdA) is managed by the Fondazione Clment Fillietroz-ONLUS, which is supported by the Regional Government of the Aosta Valley, the TownMunicipality of Nus and the 'Unit des Communes valdtaines Mont-milius'. The research at the OAVdA was partially funded by two 'Research and Education' grants from Fondazione CRT. RR acknowledges support from CONICYT project Basal AFB-170002. MM and TM acknowledge support through the Russian Government Program of Competitive Growth of Kazan Federal University. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat a l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France. This work performed in part under DOE Contract DE-AC02-76SF00515. The OVRO 40-m monitoring program is supported in part by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G, and NSF grants AST-0808050 and AST-1109911. We thank the Swift team for making these observations possible, the duty scientists, and science planners. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. FD thanks S. Covino for his help with the REM data reduction. This research has made use of data obtained from the high-energy Astrophysics Science Archive Research Center (HEASARC) provided by NASA's Goddard Space Flight Center.

The object 4C 71.07 is a high-redshift blazar whose spectral energy distribution shows a prominent big blue bump and a strong Compton dominance. We present the results of a 2- yr multiwavelength campaign led by the Whole Earth Blazar Telescope (WEBT) to study both the quasar core and the beamed jet of this source. The WEBT data are complemented by ultraviolet and X-ray data from Swift, and by γ-ray data by Fermi. The big blue bump is modelled by using optical and near-infrared mean spectra obtained during the campaign, together with optical and ultraviolet quasar templates. We give prescriptions to correct the source photometry in the various bands for the thermal contribution, in order to derive the non-thermal jet flux. The role of the intergalactic medium absorption is analysed in both the ultraviolet and X-ray bands.We provide opacity values to deabsorb ultraviolet data, and derive a best-guess value for the hydrogen column density of Nbest H = 6.3 × 10 cmthrough the analysis of X-ray spectra.We estimate the disc and jet bolometric luminosities, accretion rate, and black hole mass. Light curves do not show persistent correlations among flux changes at different frequencies. We study the polarimetric behaviour and find no correlation between polarization degree and flux, even when correcting for the dilution effect of the big blue bump. Similarly, wide rotations of the electric vector polarization angle do not seem to be connected with the source activity.© 2019 The Author(s). ; We acknowledge financial contribution from the agreement ASI-INAF n.2017-14-H.0 and from the contract PRIN-SKA-CTA-INAF 2016. PR and SV acknowledge contract ASI-INAF I/004/11/0. We acknowledge support by Bulgarian National Science Programme 'Young Scientists and Postdoctoral Students 2019', Bulgarian National Science Fund under grant DN18-10/2017 and National RI Roadmap Projects DO1-157/28.08.2018 and DO1-153/28.08.2018 of the Ministry of Education and Science of the Republic of Bulgaria. GD and OV gratefully acknowledge the observing grant support from the Institute of Astronomy and Rozhen National Astronomical Observatory, Bulgarian Academy of Sciences via bilateral joint research project 'Study of ICRF radio-sources and fast variable astronomical objects' (head -G.Damljanovic). This work is a part of the Projects No. 176011 ('Dynamics and Kinematics of Celestial Bodies and Systems'), No. 176004 ('Stellar Physics'), and No. 176021 ('Visible and Invisible Matter in Nearby Galaxies: Theory and Observations') supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia. This research was partially supported by the Bulgarian National Science Fund of theMinistry of Education and Science under grants DN 08-1/2016, DN 18-13/2017, and KP-06-H28/3 (2018). The Skinakas Observatory is a collaborative project of the University of Crete, the Foundation for Research and Technology -Hellas, and the Max-Planck-Institut fur Extraterrestrische Physik. The St Petersburg University team acknowledges support from Russian Science Foundation grant no. 17-12-01029. The Abastumani team acknowledges financial support by the Shota Rustaveli National Science Foundation under contract FR/217950/16. This work was partly supported by the National Science Fund of the Ministry of Education and Science of Bulgaria under grant DN 08-20/2016, and by funds of the project RD-08-37/2019 of the University of Shumen. The Astronomical Observatory of the Autonomous Region of the Aosta Valley (OAVdA) is managed by the Fondazione Clement Fillietroz-ONLUS, which is supported by the Regional Government of the Aosta Valley, the Town Municipality of Nus and the Unite des Communes valdotaines Mont-Emilius'. The research at the OAVdA was partially funded by two 'Research and Education' grants from Fondazione CRT

Context. The flat-spectrum radio quasar 4C +71.07 is a high-redshift (z = 2.172), γ-loud blazar whose optical emission is dominated by thermal radiation from the accretion disc. Aims. 4C +71.07 has been detected in outburst twice by the AGILE γ-ray satellite during the period from the end of October to mid-November 2015, when it reached a γ-ray flux of the order of F(E > 100 MeV)=(1.2 ± 0.3)×10 photons cm s and F(E > 100 MeV)=(3.1 ± 0.6)×10 photons cm s, respectively, allowing us to investigate the properties of the jet and the emission region. Methods. We investigated its spectral energy distribution by means of almost-simultaneous observations covering the cm, mm, near-infrared, optical, ultraviolet, X-ray, and γ-ray energy bands obtained by the GASP-WEBT Consortium and the Swift, AGILE, and Fermi satellites. Results. The spectral energy distribution of the second γ-ray flare (whose energy coverage is more dense) can be modelled by means of a one-zone leptonic model, yielding a total jet power of about 4 × 10 erg s. Conclusions. During the most prominent γ-ray flaring period our model is consistent with a dissipation region within the broad-line region. Moreover, this class of high-redshift, flat-spectrum radio quasars with high-mass black holes might be good targets for future γ-ray satellites such as e-ASTROGAM. © ESO 2019. ; AGILE is an ASI space mission developed with programmatic support by INAF and INFN. We acknowledge partial support through the ASI grant no. I/028/12/0. SV and PR acknowledge contract ASI-INAF I/004/11/0 and INAF/IASF Palermo where most of the work was carried out. SV acknowledges financial contribution from the agreement ASI-INAF no. 2017-14-H.0. Part of this work is based on archival data, software, or online services provided by the ASI SPACE SCIENCE DATA CENTER (ASI-SSDC). SV and PR thank Leonardo Barzaghi and Sara Baitieri for useful discussions. The Osservatorio di Torino team acknowledges the financial contribution from the agreement ASI-INAF No. 2017-14-H.0 and from the contract PRIN-SKA-CTA-INAF 2016. OMK acknowledges financial support from the Shota Rustaveli National Science Foundation under contract FR/217950/16 and grants NSFC11733001, NSFCU1531245. IA acknowledges support from a Ramón y Cajal grant of the Ministerio de Economía y Compet-itividad (MINECO) of Spain. The research at the IAA–CSIC was supported in part by the MINECO through grants AYA2016–80889–P, AYA2013–40825–P, and AYA2010–14844, and by the regional government of Andalucía through grant P09–FQM–4784. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain). Calar Alto Observatory is jointly operated by the MPIA and the IAA-CSIC. This research was partially supported by the Bulgarian National Science Fund of the Ministry of Education and Science under grant DN 08-1/2016. The St. Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. AZT-24 observations are made within an agreement among the Pulkovo, Rome, and Teramo observatories. GD and OV gratefully acknowledge the observing grant support from the Institute of Astronomy and Rozhen National Astronomical Observatory, Bulgaria Academy of Sciences, via bilateral joint research project "Observations of ICRF radio-sources visible in optical domain" (PI G. Damljanovic). This work is a part of Project No. 176011 ("Dynamics and kinematics of celestial bodies and systems"), No. 176004 ("Stellar physics") and No. 176021 ("Visible and invisible matter in nearby galaxies: theory and observations") supported by the Ministry of Education, Science, and Technological Development of the Republic of Serbia. The Maidanak Observatory team acknowledges support from Uzbekistan Academy of Sciences grants No. F2-FA-F027 and F.4-16. ; Peer Reviewed

We report the results of decade-long (2008-2018) γ -ray to 1 GHz radio monitoring of the blazar 3C 279, including GASP/WEBT, Fermi and Swift data, as well as polarimetric and spectroscopic data. The X-ray and γ -ray light curves correlate well, with no delay ≳ 3 h, implying general cospatiality of the emission regions. The γ -ray-optical flux-flux relation changes with activity state, ranging from a linear to amore complex dependence. The behaviour of the Stokes parameters at optical and radio wavelengths, including 43 GHz Very Long Baseline Array images, supports either a predominantly helical magnetic field or motion of the radiating plasma along a spiral path. Apparent speeds of emission knots range from 10 to 37c, with the highest values requiring bulk Lorentz factors close to those needed to explain γ -ray variability on very short time-scales. The MgII emission line flux in the 'blue' and 'red' wings correlates with the optical synchrotron continuum flux density, possibly providing a variable source of seed photons for inverse Compton scattering. In the radio bands, we find progressive delays of the most prominent light-curve maxima with decreasing frequency, as expected from the frequency dependence of the τ= 1 surface of synchrotron self-absorption. The global maximum in the 86 GHz light curve becomes less prominent at lower frequencies, while a local maximum, appearing in 2014, strengthens toward decreasing frequencies, becoming pronounced at ∼5 GHz. These tendencies suggest different Doppler boosting of stratified radio-emitting zones in the jet. © 2020 The Author(s). ; We thank the referee for attentive reading and comments that helped to improve presentation of the manuscript. The data collected by the WEBT collaboration are stored in the WEBT archive at the Osservatorio Astrofisico di Torino -INAF (ht tp://www.oato.inaf.it/blazars/webt/); for questions regarding their availability, please contact the WEBT President Massimo Villata(massimo.villata@inaf.it).TheSt.Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. The research at BU was supported in part by National Science Foundation grant AST-1615796 and NASA Fermi Guest Investigator grants 80NSSC17K0649, 80NSSC19K1504, and 80NSSC19K1505. The PRISM camera at Lowell Observatory was developed by K. Janes et al. at BU and Lowell Observatory, with funding from the NSF, BU, and Lowell Observatory. The emission-line observations made use of the DCT at Lowell Observatory, supported by Discovery Communications, Inc., BU, the University of Maryland, the University of Toledo, and Northern Arizona University. The VLBA is an instrument of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the US NSF, operated under cooperative agreement by Associated Universities, Inc. This research has used data from the UMRAO which was supported by the University of Michigan; research at this facility was supported by NASA under awards NNX09AU16G, NNX10AP16G, NNX11AO13G, and NNX13AP18G, and by the NSF under award AST-0607523. The Steward Observatory spectropolarimetric monitoring project was supported by NASA Fermi Guest Investigator grants NNX08AW56G, NNX09AU10G, NNX12AO93G, and NNX15AU81G. The Torino group acknowledges financial contribution from agreement ASI-INAF n.2017-14-H.0 and from contract PRIN-SKA-CTA-INAF 2016. I.A. acknowledges support by a Ramon y Cajal grant (RYC-2013-14511) of the 'Ministerio de Ciencia, Innovacion, y Universidades (MICIU)' of Spain and from MCIU through the 'Center of Excellence Severo Ochoa' award for the Instituto de Astrofisica de Andalucia-CSIC (SEV-20170709). Acquisition and reduction of the POLAMI and MAPCAT data were supported by MICIU through grant AYA2016-80889-P. The POLAMI observations were carried out at the IRAM 30-m Telescope, supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). The MAPCAT observations were carried out at theGerman-Spanish Calar Alto Observatory, jointly operated by the Max-Plank-Institut fur Astronomie and the Instituto de Astrofisica de Andalucia-CSIC. The study is based partly on data obtained with the STELLA robotic telescopes in Tenerife, an AIP facility jointly operated by AIP and IAC. The OVRO 40-m monitoring program is supported in part by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G, and NSF grants AST-0808050 and AST-1109911. TH was supported by the Academy of Finland projects 317383 and 320085. AZT-24 observations were made within an agreement between Pulkovo, Rome and Teramo observatories. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. The Abastumani team acknowledges financial support by the Shota Rustaveli National Science Foundation under contract FR/217950/16. r This research was partially supported by the Bulgarian National Science Fund of the Ministry of Education and Science under grants DN 081/2016, DN 18-13/2017, KP-06-H28/3 (2018), and KP-06-PN38/1 (2019), Bulgarian National Science Programme 'Young Scientists and Postdoctoral Students 2019', Bulgarian National Science Fund under grant DN18-10/2017 and National RI Roadmap Projects DO1-157/28.08.2018 and DO1-153/28.08.2018 of the Ministry of Education and Science of the Republic of Bulgaria. GD and OV gratefully acknowledge observing grant support from the Institute of Astronomy and Rozhen National Astronomical Observatory via bilateral joint research project `Study of ICRF radio-sources and fast variable astronomical objects' (head -G. Damljanovic). This work was partly supported by the National Science Fund of the Ministry of Education and Science of Bulgaria under grant DN 08-20/2016, and by project RD-08-37/2019 of the University of Shumen. This work is a part of projects nos 176011, 176004, and 176021, supported by theMinistry of Education, Science and Technological Development of the Republic of Serbia. MGM acknowledges support through the Russian Government Program of Competitive Growth of Kazan Federal University. The Astronomical Observatory of the Autonomous Region of the Aosta Valley (OAVdA) is managed by the Fondazione Clement Fillietroz-ONLUS, which is supported by the Regional Government of the Aosta Valley, the Town Municipality of Nus and the 'Unite des Communes vald 'otainesMont-Emilius'. The research at the OAVdA was partially funded by several `Research and Education' annual grants from Fondazione CRT. This article is partly based on observations made with the IAC80 and TCS telescopes operated by the Instituto de Astrofisica de Canarias in the Spanish Observatorio del Teide on the island of Tenerife. A part of the observations were carried out using theRATAN-600 scientific equipment (SAO of the Russian Academy of Sciences).

Frontmatter -- Contents -- Digital Economy in the 21 Century: An Introduction to the Institutional Approach -- Part I: The Scientific Concept of the Digital Economy in the 21st Century -- 1 Digital Economy as a Modern Type of Economic System -- 2 "Digitalization"- Overcoming Institutional Barriers -- 3 Development of the Information Technologies Sector in Latvia under Globalization -- 4 The Principles of Functioning and Priorities of Development of the Digital Economy -- 5 Classification of Breakthrough Digital Technologies and the Perspectives of Their Application in Economy -- Part II: The Process of Digital Economy Institutionalization in the 21st Century -- 6 The Essence and Logic of the Process of Sectorial Markets' Digital Transformation -- 7 The Current Tendencies of Economy Digitalization in Developed and Developing Countries -- 8 The Main Stages of the Digital Modernization of Economy -- 9 Implementation of Cluster Initiatives in the Digital Sphere as a Tool of Digital Entrepreneurship's Institutionalization -- 10 Institutions of Support for Digital Entrepreneurship: Special Economic Zones, Innovative Networks and Technological Parks -- Part III: Meso-Level Institutions of the Digital Economy in the 21st Century -- 11 Digitalization of Regional Economy: Problems and Perspectives -- 12 The Institutional Model of the Digital Economy Creation in a Modern Region -- 13 Managing a Modern Region Based on Digital Technologies -- Part IV: Macro-Level Institutions of the Digital Economy in the 21st Century -- 14 State Institutional Regulation of Economy Digital Modernization -- 15 The Role of Financial Institutions in Supporting the Digital Economy -- 16 Digital Economy of the 21st Century: A View from the Positions of Developed and Developing Countries -- Part V: The Global Institutions of the Digital Economy in the 21st Century -- 17 International Trade in the Digital Sphere: Barriers and Prospects for Development -- 18 The Existing and Perspective International Institutions for Supporting Digital Transformation of Economy -- 19 The Scientific and Methodological Approach to Provision and Evaluation of the Digital Economy's Global Competitiveness -- 20 The Strategy of Optimal Development of the Digital Economy: A View from the Positions of Game Theory -- 21 The Institutional Model of Well-Balanced and Sustainable Digital Economy -- 22 The Institutional Mechanism of Managing the Digital Economy's Development -- Part VI: Case Studies of Institutions of the Digital Economy in the 21st Century -- 23 Problems and Prospects of Economic Cooperation Between Russia and Mexico -- 24 Innovative Critical Success Factors for Public – Private Partnerships (PPP) in Infrastructure Projects of Developing Countries. A Case of Zambia -- 25 Prediction Mechanism of the Territorial Socio-Economic Processes in Formation of the Information Systems -- 26 Specific Economic Security Regulations in the Context of Pathological Crises of Digital Transformation of Agricultural Organizations -- Conclusion: Institutional Perspectives of the Digital Economy's Development in the 21st Century -- List of Figures -- List of Tables -- Index

The very high energy (VHE ¿ 100 GeV) -ray MAGIC observations of the blazar S4 0954+65, were triggered by an exceptionally high flux state of emission in the optical. This blazar has a disputed redshift of z = 0.368 or z ¿ 0.45 and an uncertain classification among blazar subclasses. The exceptional source state described here makes for an excellent opportunity to understand physical processes in the jet of S4 0954+65 and thus contribute to its classification. Methods. We investigated the multiwavelength (MWL) light curve and spectral energy distribution (SED) of the S4 0954+65 blazar during an enhanced state in February 2015 and have put it in context with possible emission scenarios. We collected photometric data in radio, optical, X-ray, and ¿-ray. We studied both the optical polarization and the inner parsec-scale jet behavior with 43 GHz data. Results. Observations with the MAGIC telescopes led to the first detection of S4 0954+65 at VHE. Simultaneous data with Fermi-LAT at high energy ¿-ray(HE, 100 MeV < E < 100 GeV) also show a period of increased activity. Imaging at 43 GHz reveals the emergence of a new feature in the radio jet in coincidence with the VHE flare. Simultaneous monitoring of the optical polarization angle reveals a rotation of approximately 100. Conclusions. The high emission state during the flare allows us to compile the simultaneous broadband SED and to characterize it in the scope of blazar jet emission models. The broadband spectrum can be modeled with an emission mechanism commonly invoked for flat spectrum radio quasars (FSRQs), that is, inverse Compton scattering on an external soft photon field from the dust torus, also known as external Compton. The light curve and SED phenomenology is consistent with an interpretation of a blob propagating through a helical structured magnetic field and eventually crossing a standing shock in the jet, a scenario typically applied to FSRQs and low-frequency peaked BL Lac objects (LBL). © ESO 2018. ; The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009-00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia "Severo Ochoa" SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia "María de Maeztu" MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq, and FAPERJ. IA acknowledges support by a Ramón y Cajal grant of the Ministerio de Economía, Industria y Competitividad (MINECO) of Spain. The research at the IAA–CSIC was supported in part by the MINECO through grants AYA2016–80889–P, AYA2013–40825–P, and AYA2010–14844, and by the regional government of Andalucía through grant P09–FQM–4784. ; Peer Reviewed