analysis of dynamics
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2022 ◽  
Vol 98 (1) ◽  
pp. 245-262
Author(s):  
Srdjan Vucetic

Abstract Thirty years ago, William Wallace likened British foreign policy to a musical tug-of-war between the ‘Anglo-Saxons’ and ‘Europeans’, attributing ‘all the best tunes’ to the former. This article revisits Wallace's thesis and its main concept: national identity. It finds that Wallace was right to draw attention to the power of the ruling elite to shape Englishness and Britishness. However, the article also finds that ‘global’ foreign policy ideas were never the exclusive province of a segment of the British elite. Rather, they circulated in English and more broadly British society writ large, reflecting and reinforcing deep-seated, even unselfconscious, agreements between both ‘Anglo-Saxon’ and ‘European’ elites on the one hand, and much of the mass consumer public on the other. It follows that the constraints posed on possibilities of foreign policy change were always greater than Wallace had suggested; that a ‘lesser’ British foreign policy that was, and still is, so hard to imagine for the British is significant for analysis of dynamics of ‘western’ knowledge production that come under critique in this special issue. But rather than focusing exclusively on elites, critical analyses of knowledge exchange should be attuned to popular common sense, too.


2022 ◽  
Vol 7 (4) ◽  
pp. 5175-5198
Author(s):  
Ram Singh ◽  
◽  
Attiq U. Rehman ◽  
Mehedi Masud ◽  
Hesham A. Alhumyani ◽  
...  

<abstract><p>In this study, a mathematical model for the differentiation of stem cells is proposed to understand the dynamics of cell differentiation in a complex network. For this, myeloid cells, which are differentiated from stem cells, are introduced in this study. We introduce the threshold quantity $ \mathcal{R}_{0} $ to understand the population dynamics of stem cells. The local stability analysis of three equilibria, namely $ (i) $ free equilibrium points, $ (ii) $ absence of stem and progenitor cells, and $ (iii) $ endemic equilibrium points are investigated in this study. The model is first formulated in non-fractional order and after that converted into a fractional sense by utilizing the Atangana-Baleanu derivative in Caputo (ABC) sense in the form of a non-singular kernel. The model is solved by using numerical techniques. It is seen that the myeloid cell population significantly affects the stem cell population.</p></abstract>


Author(s):  
K. Utkina ◽  
A. Garbuz ◽  
M. Kulyk

The aim of the paper is to assess dynamics of water quality in four main recreational areas in Kharkiv and to develop recommendations for water quality improvement. Methods. Field and laboratory methods and analytical data processing. Results. The paper presents analysis of dynamics in water quality for four main recreational areas located in Kharkiv: Zhuravlevskiy Hydropark, Oleksiivskiy Lugopark, Udyanskiy Hydropark and Osnovyanske Lake. Period of study: 2006-2020, time: May-June and August-September. Average data are presented. Samples were analysed at certified Laboratory of Analytical Chemical Research of the Karazin Institute of Environmental Sciences. Laboratory data were compared with national UA standards and European ones. Conclusions were made for the following key parameters: dissolved oxygen and BOD5, total mineralization, biogenic substances content, oil products and surfactants, toxic heavy metals content. There is no specific dynamics on the pollution level. Conclusions. The following recommendations for improvement of water quality were developed: (i) to preform regular monitoring of water quality; (ii) to introduce regular and systematic control by one local authority; (iii) to improve infrastructure of recreational areas; (iv) to introduce regular cleaning of the recreational areas; (v) to install bio-WC; (vi) to install additional waste containers (preferably with separate waste collection); (vii) plant trees for better isolation from highways; (viii) to improve level of water treatment on WWTP; (ix) to create nature protected areas along rivers


2021 ◽  
Vol 33 (11) ◽  
pp. 115603
Author(s):  
Vladimir V Dirko ◽  
Kirill A Lozovoy ◽  
Andrey P Kokhanenko ◽  
Alexander V Voitsekhovskii

Abstract In this paper, we analyze superstructural transitions during epitaxial growth of two-dimensional layers and the formation of quantum dots by the Stranski–Krastanov mechanism in elastically stressed systems by the reflection high-energy electron diffraction method. Detailed dependences of the periodicity parameter N of the 2 × N reconstruction on the effective thickness of the deposited material in a wide range of growth temperatures during epitaxy of germanium on a silicon surface with a crystallographic orientation (001) are obtained. Superstructural transitions and the change in the value of the parameter N at low temperatures of epitaxy in this system have been investigated for the first time. It is shown that the length of dimer rows in such a reconstruction during the growth of pure germanium on silicon can reach a value of no less than N = 11. A relationship is found between the value of the parameter N, determined by elastic strains in the system, and the critical thickness of the transition from two-dimensional to three-dimensional growth. Based on this relationship, a physical mechanism is proposed that explains the nature of the temperature dependence of the critical thickness of the Stranski–Krastanov transition, which has been the subject of constant scientific disputes until now.


2021 ◽  
Vol 119 (6) ◽  
pp. 41-52
Author(s):  
MEREZHKO Nina ◽  
ZOLOTAROVA Oksana ◽  
KALUGA Nina

Background. The high share of imported energy resources in the structure of the fuel and energy complex reduces the level of energy security. Ukraine is 85% dependent on imports of petroleum products. In such conditions, it is important to ensure the effective functioning of the Energy Customs of the State Customs Service, which carries out customs control and clearance throughout the customs territory of Ukraine. The analysis of recent research and publications has shown that systematic studies of features of customs control and registration of energy sources are absent. However, scientists have studied the peculiarities of energy moving across the customs border in Ukraine and the EU, the problematic issues of customs formalities for goods moving across the customs border of Ukraine by pipeline. The aim of the article is to study and systematize information on customs clearance of energy sources in Ukraine, identify problematic issues and develop proposals to improve the efficiency of the Energy Customs of the State Customs Service. Materials and methods. The information base contains scientific publications of domestic scientists, normative-legal and legislative base of Ukraine. Methods of analysis and synthesis, scientific generalization and comparison of data from scientific sources are used. Results. The main tasks of the Energy Customs of the State Customs Service in ensuring the implementation of policy in the field of customs are analyzed. The analysis of dynamics of export-import operations with oil products on the market of Ukraine for 2011–2020 is carried out. Proposals have been developed to speed up and simplify customs control of oil products and increase the efficiency of the Energy Customs of the State Customs Service. Conclusion. To increase the efficiency of the Energy Customs, it is necessary to intensify work in the areas of: use of technical means of customs control, installation of weighing systems, introduction of express laboratories to strengthen control and reduce customs clearance time, purchase and use resources of leading price agencies to control customs value of oil products, use of oil products labeling for identification purposes.


Author(s):  
Valentina Filina

The problem of improving the health of children, as well as strengthening their physical, mental and spiritual health is one of the most important tasks of the state.  The process of judo training is accompanied by the alternation of different emotional states.  These states are positive or negative, depending on a number of reasons.  During the struggle, emotional states change.  It depends on the course of the match.  Emotion management and the ability to maintain a stable psycho-emotional state is produced by a judoka in the process of gaining sports experience. In recent years, the modern view of healthy living has aroused interest in health care systems and educational institutions based on the inextricable link between body and mind. In addition, public interest in various types of martial arts has now increased to ensure good physical shape and health.  Deterioration of psycho-emotional state and health involuntarily leads to a decrease in intellectual activity.  Judo, according to many researchers, is one of the best ways to improve the physical, mental and emotional state of students.  The article identifies the level of situational anxiety and tests (Spielberger-Hanin) among schoolchildren aged 16-17 who practice judo.  And also the comparative analysis of dynamics of indicators of a psychoemotional condition of boys and girls of 16 – 17 years in the course of experiment is made.  The results of research have shown that judo classes have a positive effect on the psycho-emotional state of students, meet the age, functional, physical and mental characteristics of boys and girls 16 – 17 years and can be used to solve health problems of judo practitioners.


2021 ◽  
Author(s):  
Gatis Melkus ◽  
Karlis Cerans ◽  
Karlis Freivalds ◽  
Lelde Lace ◽  
Darta Zajakina ◽  
...  

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