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Mikhailov, A.,Matthiesen, H.O. The Society of Air-Conditioning and Refrigerating 2010 International Journal Of Air-Conditioning and Refr Vol.18 No.3
In this paper, a comparative study of $CO_2$ and water-based brine secondary cooling systems for refrigeration applications is presented. $CO_2$ secondary systems are simple and could prove to be attractive for high temperature (HT) and medium temperature (MT) in industrial and commercial refrigeration applications regardless of climate. Calculations show that $CO_2$ secondary systems give a possibility of energy savings in the range of 10-20% for HT systems and more than 20-30% for MT systems. The design and particular challenges of $CO_2$ systems are discussed. Th analysis is illustrated by case studies. Further possibilities to optimized secondary $CO_2$ systems by modulating pressure or applying frequency converters are discussed. The use of secondary $CO_2$ systems in commercial refrigeration installations (supermarket systems) is briefly discussed.
Pressure change dynamics of plasma focus chambers as a part of the pulse neutron generators
Mikhailov Yu.V.,Prokuratov I.A.,Lemeshko B.D.,Morozov V.M.,Dulatov A.K.,Charaev O.A.,Rukoliansky A.O.,Andreev V.G.,Litvinov I.N. 한국물리학회 2022 Current Applied Physics Vol.39 No.-
The dynamics of working gas pressure changes in the plasma focus (PF) chambers were studied by using the chamber with a built-in manometer as part of the ING-102 neutron generator (2.5 MeV neutron yield 106÷107 neutrons/pulse). Investigations were carried out during high-voltage training and neutron emission operation mode. The studies were executed while filling the chamber with various gas mixtures. For operation with a deuterium-tritium mixture, a sealed-off chamber with a built-in gas generator was used. After the primary filling of the PF chambers with a gas mixture, there is a systematic decrease in pressure by Δp = (5 ÷ 50)⋅10-3 Torr (~0,7 ÷ 7 Pa) after each shot of the chamber. The change in the shape of breakdown curves Ubr(p) in the interelectrode gap of the chamber after each series of shots was studied. That made it possible to assess the optimal number of shots during high-voltage training of the PF chamber.
A. MIKHAILOV,H. O. MATTHIESEN 대한설비공학회 2010 International Journal Of Air-Conditioning and Refr Vol.18 No.3
In this paper, a comparative study of CO2 and water-based brine secondary cooling systems for refrigeration applications is presented. CO2 secondary systems are simple and could prove to be attractive for high temperature (HT) and medium temperature (MT) in industrial and commercial refrigeration applications regardless of climate. Calculations show that CO2 secondary systems give a possibility of energy savings in the range of 10–20% for HT systems and more than 20–30% for MT systems. The design and particular challenges of CO2 systems are discussed. The analysis is illustrated by case studies. Further possibilities to optimized secondary CO2 systems by modulating pressure or applying frequency converters are discussed. The use of secondary CO2 systems in commercial refrigeration installations (supermarket systems) is briefly discussed.
Ivan S. Mikhailov,Yuri S. Bukin,Yulia R. Zakharova,Marina V. Usoltseva,Yuri P. Galachyants,Maria V. Sakirko,Vadim V. Blinov,Yelena V. Likhoshway 한국미생물학회 2019 The journal of microbiology Vol.57 No.4
Phytoplankton and bacterioplankton play a key role in carbon cycling of aquatic ecosystems. In this study, we found that co-occurrence patterns between different types of phytoplankton, bacterioplankton, and environmental parameters in Lake Baikal during spring were different over the course of three consecutive years. The composition of phytoplankton and bacterial communities was investigated using microscopy and 16S rRNA gene pyrosequencing, respectively. Non-metric multidimensional scaling (NMDS) revealed a relationship between the structure of phytoplankton and bacterial communities and temperature, location, and sampling year. Associations of bacteria with diatoms, green microalgae, chrysophyte, and cryptophyte were identified using microscopy. Cluster analysis revealed similar correlation patterns between phytoplankton abundance, number of attached bacteria, ratio of bacteria per phytoplankton cell and environmental parameters. Positive and negative correlations between different species of phytoplankton, heterotrophic bacteria and environmental parameters may indicate mutualistic or competitive relationships between microorganisms and their preferences to the environment.
Nationalism and Siberian archeology of the 19th century
Ternov Nikolay,Mikhailov Dmitry 한양대학교 아태지역연구센터 2022 Journal of Eurasian Studies Vol.13 No.1
The article provides a comparative characteristic of the nationally motivated ethnocultural concepts of the 19th century, based on the interpretation of Siberian peoples` history. Finnish nationalism was looking for the ancestral home of the Finns in Altai and tried to connect them with the Turkic-Mongol states of antiquity and the Middle Ages. Under the influence of the cultural and historical theories of regional experts, the Siberian national discourse itself began to form, which was especially clearly manifested in the example of the genesis of Altai nationalism. Russian great-power nationalism sought to make Slavic history more ancient and connected it with the prestigious Scythian culture.If we rely on the well-known periodization of the development of the national movement of M. Khrokh, then in the theory of the Finns` Altai origin, we can distinguish features characteristic of phase “B,” when the cultural capital of nationalism gradually turns into political. In turn, the historical research of the regional specialists illustrates the earliest stage in the emergence of the national movement, the period of nationalism not only without a nation but also without national intellectuals. The oblasts are forming the very national environment, which does not yet have the means for its own expression, but it obviously contains separatist potential. At the same time, both the Finnish and Siberian patriots, with their scientific research, solved the same ideological task—to include the objects of their research in the world cultural and historical context, to achieve recognition of their right to a place among European nations. However, Florinsky’s theory, performing the function of the official propaganda, is an example of the manifestation of state unifying nationalism, with imperial connotations characteristics of Russia.
Yun, Sunghwan,Mikhailov, Gennadii,Kim, Sang Ji,Lim, Jae-Yong Elsevier 2017 Annals of nuclear energy Vol.110 No.-
<P><B>Abstract</B></P> <P>For a metal-fueled SFR (Sodium-cooled Fast Reactor), the negative feedback of the reactivity due to the thermal expansion of fuel has been a principal safety mechanism to guarantee passive reactor shutdown after undercooling accidents. In this paper, an experimental model of the fuel axial expansion reactivity in a metal-fueled SFR was proposed and measured values using the BFS-109-2A critical assembly was compared with calculated values using as-built MCNP models based on the ENDF/B-VII.0 library. The energy-dependent axial expansion reactivity components of the BFS-109-2A model showed good agreement with those of the target core. The difference in the calculation/experiment ratio between the as-built MCNP models and measurements vary from −10.2% to 2.6% for the axial expansion reactivity, meanwhile the suggested axial expansion model showed a 25% discrepancy comparing to the target core.</P> <P><B>Highlights</B></P> <P> <UL> <LI> In this paper, an experimental model of the fuel axial expansion reactivity in a metal-fueled SFR was proposed. </LI> <LI> The suggested axial expansion model based on the BFS critical assembly reflects well the spectral component of the axial expansion reactivity. </LI> <LI> The difference in the calculation/experiment ratio between the as-built MCNP models and measurements vary from −10.2% to 2.6% for the axial expansion reactivity. </LI> </UL> </P>
Rushchyshyn, Nadiya,Kulinich, Oksana,Tvorydlo, Olha,Mikhailov, Alexander,Viunyk, Olha International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.4
The main purpose of the study is to analyze the main aspects of state regulation of the banking business in the context of social and digital transformation. One of the key elements of the functioning of the economy of any country are banks that ensure the redistribution of financial resources and stimulate economic growth. However, the banking sector, like other activities, is dynamic and depends on the pace of development and forms of technological progress that affect the forms and types of information and digital technologies, as well as the globalization and remoteness of banking services. Accordingly, the need for effective implementation of the latest technologies becomes relevant, which will not only help increase consumer satisfaction with the banking product, but also ensure the development of the country's financial sector. As a result of the study, trends in the development of state regulation of the banking sector in the digital economy were identified.