Thermal-Mechanical Effects and Near-Critical Fluid Dynamic Behaviors in Micro-Scale

Author(s):  
Lin Chen

Supercritical CO2 fluid has been widely used in chemical extraction, chemical synthesis, micro-manufacturing, and heat transfer apparatus, and so forth. The current chapter deals with near-critical CO2 micro-scale thermal convective flow and the effects of thermal-mechanical process. When the scale becomes smaller, new, and detailed figures of near-critical thermal effects emerges. To explore this new area, theoretical developments and numerical investigations are discussed and explained in this chapter. From a theoretical point of view, the thermal-mechanical nature of near-critical fluid would play a leading role in small time and spatial scales. This effect is found dominant to the thermal dynamic responses and convective structures of micro-scale fluid behaviors. The scaling effects, boundary thermal-mechanical process, instability evolutions, mixing flows and characteristics, possible extensions, and applications are also discussed in this chapter.

Author(s):  
Lin Chen

Supercritical CO2 fluid has been widely used in chemical extraction, chemical synthesis, micro-manufacturing and heat transfer apparatus, and so forth. The current chapter deals with near-critical CO2 micro-scale thermal convective flow and the effects of thermal-mechanical process. When the scale becomes smaller, new and detailed figures of near-critical thermal effects emerges. To explore this new area, theoretical developments and numerical investigations discussed and explained in this chapter. From a theoretical point of view, the thermal-mechanical nature of near-critical fluid would play a leading role in small time and spatial scales. This effect is found to dominants the thermal dynamic responses and convective structures of micro-scale fluid behaviors. The scaling effects, boundary thermal-mechanical process, instability evolutions, mixing flows and characteristics, possible extensions and applications are also discussed in this chapter.


2019 ◽  
pp. 22-29
Author(s):  
Н. В. Фрадкіна

The purpose and tasks of the work are to analyze the contemporary Ukrainian mass culture in terms of its value and humanistic components, as well as the importance of cultural studies and Ukrainian studies in educational disciplines for the formation of a holistic worldview of modern youth.Analysis of research and publications. Scientists repeatedly turned to the problems of the role of spirituality in the formation of society and its culture. This problem is highlighted in the publications by O. Losev, V. Lytvyn, D. Likhachev, S. Avierintsev, M. Zakovych, I. Stepanenko and E. Kostyshyn.Experts see the main negative impact of mass culture on the quality approach, which determines mass culture through the market, because mass culture, from our point of view, is everything that is sold and used in mass demand.One of the most interesting studies on this issue was the work by the representatives of Frankfurt School M. Horkheimer and T. Adorno «Dialectics of Enlightenment» (1947), devoted to a detailed analysis of mass culture. Propaganda at all socio-cultural levels in the form is similar in both totalitarian and democratic countries. It is connected, according to the authors, with the direction of European enlightenment. The tendency to unify people is a manifestation of the influence of mass culture, from cinema to pop. Mass culture is a phenomenon whose existence is associated with commerce (accumulation in any form – this is the main feature of education), in general, the fact that it exists in this form is related to the direction of the history of civilization.Modern mass culture, with its externally attractive and easily assimilated ideas and symbols, appealing to the trends of modern fashion, becomes a standard of prestigious consumption, does not require intense reflection, allows you to relax, distract, not teach, but entertains, preaches hedonism as the main spiritual value. And as a consequence, there are socio-cultural risks: an active rejection of other people, which leads to the formation of indifference; cruelty as a character trait; increase of violent and mercenary crime; increase in the number of alcohol and drug addicts; anti-patriotism; indifference to the values of the family and as a result of social orphanhood and prostitution.Conclusions, perspectives of research. Thus, we can conclude that modern Ukrainian education is predominantly formed by the values of mass culture. Namely, according to the «Dialectic» by Horkheimer and Adorno, «semi-enlightenment becomes an objective spirit» of our modern society.It is concluded that only high-quality education can create the opposite of the onset of mass culture and the destruction of spirituality in our society. It is proved that only by realizing the importance of cultivating disciplines in the educational process and the spiritual upbringing of the nation, through educational reforms, humanitarian knowledge will gradually return to student audiences.Formation of youth occurs under the influence of social environment, culture, education and self-education. The optimal combination of these factors determines both the process of socialization itself and how successful it will be. In this context, one can see the leading role of education and upbringing. It turns out that the main task of modern education is to spread its influence on the development of spiritual culture of the individual, which eventually becomes a solid foundation for the formation of the individual. Such a subject requires both philosophical and humanitarian approaches in further integrated interdisciplinary research, since the availability of such research will provide the theoretical foundation for truly modern educational and personal development.


2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Christiane Zarfl ◽  
Jürgen Berlekamp ◽  
Fengzhi He ◽  
Sonja C. Jähnig ◽  
William Darwall ◽  
...  

AbstractDam construction comes with severe social, economic and ecological impacts. From an ecological point of view, habitat types are altered and biodiversity is lost. Thus, to identify areas that deserve major attention for conservation, existing and planned locations for (hydropower) dams were overlapped, at global extent, with the contemporary distribution of freshwater megafauna species with consideration of their respective threat status. Hydropower development will disproportionately impact areas of high freshwater megafauna richness in South America, South and East Asia, and the Balkan region. Sub-catchments with a high share of threatened species are considered to be most vulnerable; these are located in Central America, Southeast Asia and in the regions of the Black and Caspian Sea. Based on this approach, planned dam locations are classified according to their potential impact on freshwater megafauna species at different spatial scales, attention to potential conflicts between climate mitigation and biodiversity conservation are highlighted, and priorities for freshwater management are recommended.


2020 ◽  
Vol 26 (10) ◽  
pp. 51-59
Author(s):  
S. Kononov ◽  

The article is devoted to the analysis of the problems of a social security modern discourse formation in the framework of a philosophical discussion of the transformation processes of the formation vector of the state security policy. The task of the article, according to the author, is to present the problem of security in conditions when it ceases to be understood, as a concept associated with the idea of preserving the integrity of a state or nation, and functions as a phenomenon with the broadest possible social parameters. Using the methodology of phenomenological, hermeneutic and comparative analysis, the new areas of security research, common difference of which is social and personal orientation are analyzed. The author pays attention to the features of the methodology of works reflecting the point of view of the modern state, works related to the development of a systematic approach to security, works based on an axiological approach and concludes that, despite the expansion of security interpretations, all these approaches retain a common ideological foundation. presupposing the need to preserve the leading role of the state in the field of social security, including the security of the individual and society and the state. All these approaches are based on the policy of responding to emerging threats to the Russian state and do not reflect the needs of a comprehensive strategic goal-setting covering the sphere of socio-economic development of the social system. This circumstance, according to the author, leads to the formation of a security strategy that exists only in the name of protecting the state and does not imply feedback between the state and the social institutions that the state is going to protect, which leads to the ineffectiveness of modern protection measures and the need to find new ways to justify the need for this protection, a new definition of its content and essence


2021 ◽  
pp. 80-87
Author(s):  
Terdi E. S. ◽  
◽  
Skrynnik I. K. ◽  

The article is devoted to the problem of the inconsistency of the Russian imperative model of active legal capacity, according to which the content of active legal capacity in case of its restriction due to mental disability of a person is prescribed by the law, to the Convention on the Rights of Persons with Disabilities ratified by Russia in 2012. The purpose of the paper is to demonstrate the shortcomings of the imperative model, the main of which is the lack of authority of the Russian court to individually determine the consequences of restriction of active legal capacity of a person due to mental disorder, taking in account degree of actual decrease of his cognitive and volitional abilities. This purpose is achieved by the consistent implementation of the following tasks. First of all, characteristic of the Russian imperative model of active legal capacity is given. Secondly, the French dispositive model of legal capacity is described. In this model the forms of legal protection, but not the categories of active legal capacity, incapacitation and restricted active legal capacity are the backbone concepts for the legal regulation of this group of relationship. It is noted that under the influence of the Convention on the Rights of Persons with Disabilities the more progressive, from the point of view of international law, forms of this model are stipulated in many foreign countries. Thirdly, the evolved form of the French dispositive model of active legal capacity, implemented in the Bill 18 «An Act to amend the Civil Code, the Code of Civil Procedure, the Public Curator Act and various provisions as regards the protection of persons», that was adopted by the National Assembly of Quebec in 2 June 2020, is analyzed. The main advantage of the latter is that the court, establishing the form of protection, is not bound by the legal norms that imperatively determine the content of active legal capacity of a person with mental disorder. The court is able, based on the cognitive and volitional abilities of particular person, to individually determine which acts person can perform by himself, alone or with the assistance of the tutor, and which one can be performed by the tutor only. The objectives of the study determine the leading role of the comparative legal method in its implementation. The provided research makes possible to assess the perspectives of borrowing of French or Quebec dispositive models of active legal capacity of people with mental disorder by the Russian legislator.


Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1541 ◽  
Author(s):  
Sahereh Kaykhosravi ◽  
Usman Khan ◽  
Amaneh Jadidi

This review compares and evaluates eleven Low Impact Development (LID) models on the basis of: (i) general model features including the model application, the temporal resolution, the spatial data visualization, the method of placing LID within catchments; (ii) hydrological modelling aspects including: the type of inbuilt LIDs, water balance model, runoff generation and infiltration; and (iii) hydraulic modelling methods with a focus on the flow routing method. Results show that despite the recent updates of existing LID models, several important features are still missing and need improvement. These features include the ability to model: multi-layer subsurface media, tree canopy and processes associated with vegetation, different spatial scales, snowmelt and runoff calculations. This review provides in-depth insight into existing LID models from a hydrological and hydraulic point of view, which will facilitate in selecting the best-suited model. Recommendations on further studies and LID model development are also presented.


2017 ◽  
Vol 20 (04) ◽  
pp. 1750025
Author(s):  
J. N. DEWYNNE ◽  
N. EL-HASSAN

We present two models for the fair value of a self-funding instalment warrant. In both models we assume the underlying stock process follows a geometric Brownian motion. In the first model, we assume that the underlying stock pays a continuous dividend yield and in the second we assume that it pays a series of discrete dividend yields. We show that both models admit similarity reductions and use these to obtain simple finite-difference and Monte Carlo solutions. We use the method of multiple scales to connect these two models and establish the first-order correction term to be applied to the first model in order to obtain the second, thereby establishing that the former model is justified when many dividends are paid during the life of the warrant. Further, we show that the functional form of this correction may be expressed in terms of the hedging parameters for the first model and is, from this point of view, independent of the particular payoff in the first model. In two appendices we present approximate solutions for the first model which are valid in the small volatility and the short time-to-expiry limits, respectively, by using singular perturbation techniques. The small volatility solutions are used to check our finite-difference solutions and the small time-to-expiry solutions are used as a means of systematically smoothing the payoffs so we may use pathwise sensitivities for our Monte Carlo methods.


2021 ◽  
Vol 1 (83) ◽  
pp. 132-149
Author(s):  
Sergii Boltivets

The article reveals the historical conditions, content and consequences of the “Scientific session on the problems of physiological teaching of Academician I.P. Pavlov” June 28 - July 4, 1950, which aimed to establish the leading role of the cerebral cortex with the subordination of all physiological processes reflected in the conditioned reflexes determined by IP Pavlov. But in reality, such a meaning was only the external plot of J.V. Stalin’s script, which consisted in taming scientists by means of harassing one of their groups on another. The roles of whistleblowers and accused of infidelity to the teachings of I.P. Pavlov were determined by J.V. Stalin in advance from among the students of the scientist, and his scientific authority was turned into a means of reproach and accusation. In fact, the main reports, speeches and discussions only seemingly proclaimed their relevance to the purpose of the stated topic – the problems of physiological teaching of Academician I.P. Pavlov. These problems were only a means of accusing a group of scientists, first of all the favorite and closest to I.P. Pavlov of his students in order to discredit them and further repression. The proclamation at the session of June 28 - July 4, 1950 of the actual cult of personality of Pavlov was actually a means of devaluing this doctrine, as it limited the further development of physiological, and with it psychological, genetic, medical knowledge in the former USSR. The psychiatric continuation was realized in a subsequent similar session entitled: “Physiological teachings of Academician I.P. Pavlov in psychiatry and neuropathology”, which lasted from 11 to 15 October of the following year, 1951. Both sessions were preceded by a session of the All-Union Academy of Agricultural Sciences named after V.I. Lenin (in the Russian original abbreviation “VASHNIL – All-Union Academy of Agricultural Sciences named after V.I. Lenin”) July 31 – 1948, which was the destruction of genetics. Thus, the development of genetics, physiology, psychology, and psychiatry was interrupted for several decades. Repressions included the defeat of fiction (Resolution of the Central Committee of the VKP (b) on the magazines “Zvezda” and “Leningrad”, August 1946), the defeat of musical culture (Resolution “On decadent tendencies in Soviet music” on February 10, 1948), the defeat of research history (September 1946, September 1949), the defeat of biology (session “VASHNIL” in 1948), the defeat of physiology (Pavlov’s session, 1950), another defeat of economists’ research (Stalin’s article “Economic problems of socialism in the USSR” ), the defeat of linguistics (Stalin’s article “Marxism and the problems of linguistics” in 1959), the defeat of chemistry (1951), the defeat of medicine (The case of the murderous doctors 1952 – 1953). The contrast of the way of thinking characteristic of the people of Russia is revealed, on the basis of which repressions and an unprecedented conviction in the morality of murder and other forms of violence in the USSR became possible. As a result, the purpose of the scientist and his life purpose is redirected to serve the highest levels of power instead of serving the truth and evaluated from the height of these higher levels, where the criterion of truth is a matter of personal preference of the ruler of the top floor of the pyramid. The ways of using IP Pavlov’s name at the session dedicated to his name, as well as I.P. Pavlov’s position in relation to the authorities and psychologists are given. The opposition of the work of I.P. Pavlov to the works of Z. Freud, T. Morgan and other scientists, which is not justified by the content and scientific spheres in which scientists worked, is revealed. The Ukrainian-Georgian direction of the Pavlov’s session, which was considered peripheral from the point of view of the Moscow speakers appointed by J.V. Stalin, is covered. Based on the principle of action of V.A. Romanets, the main consequences of the aftereffect of seven decades are presented. These include the incompleteness of the aftermath of the Pavlov’s session, which consists not only in the indefinite implementation of its resolution, but also the transmission from generation to generation of scholars of postcolonial countries that emerged after the collapse of the USSR, ways of thinking, organizing relationships and imitative behavior that cannot be explained modern trends in the scientific world of free countries. The mechanisms of the system of organization of scientific activity tested by Pavlovskaya and other sessions, which after the collapse of the USSR replace the dead institutions of control over scientists, are revealed. The conclusions state that Ukraine must free itself from the communist Stalinist legacy, and that Ukrainian psychologists play a leading role in this, as the psychological climate of all Ukrainian science needs to change. It is noted that the creation of conditions for the free scientific search of Ukrainian scientists of all specialties requires the elimination of generalized fear, inherited and actualized by the current apologists of Stalinist academism. This fear must be transformed into the joy of creating previously unknown knowledge for the spiritual and intellectual prosperity of the Ukrainian nation in the community of other nations of the world.


Author(s):  
A. L. Semenov ◽  
V. I. Ershov ◽  
D. A. Gusarov

This paper deals with the concept of the translation approach to the problem of interaction of language and culture in terms of determination of the translation solutions by linguoethnic factors. The authors pay main attention to the analysis of the notion of culture. The concept proceeds from the views and opinions regarding the culture and its role in shaping the identity of the person introduced by the honorary doctor (doctor honoris cause) of the MGIMO-University Federico Major in his book «New page». Sharing the point of view of F. Major , the authors come to the conclusion that culture is a knowledge, based on which an individual perceives and evaluates his performance and behavior. Projecting such a position on the verbal behavior, the authors highlight the leading role of culture in the process of producing a speech act played when choosing the individual models of behavior on the basis of the knowledge of the communicative situation. Based on F. Mayor`s opinion that culture unites rather than divides people, the authors note the presence of universal and unique linguoethnic elements in the cultural knowledge of the representatives of various ethnic groups which determine the degree of similarities and differences in the ways of expressing knowledge in different languages. In this paper the authors reasonably use the term «linguoethnic» to describe the cultural-cognitive peculiarities inherent to individuals as representatives of different ethnic groups, as well as give comparison of the terms «linguoethnic» and «linguocultural».


2014 ◽  
Vol 609-610 ◽  
pp. 64-67
Author(s):  
Xiao Ni Ma ◽  
Li Hua Zhang ◽  
Li Xue Zheng ◽  
Zhan Hua Yang ◽  
Qing Gao ◽  
...  

Anodic spark deposition (ASD) is a novel technique to deposit bioceramic films on the surface of titanium (Ti) and its alloys, and the films prepared with nano/micro scale pores are characterized by high-quality performance for dental implant. Among the process parameters, electrolyte provides a leading role owing to its vital influence not only on the films chemistry but also on the electrical conductivity of the circuit, which affects the film properties. In this study, titania porous films were synthesized by ASD and the effect of electrolytic temperature on microstructure and chemical composition of the films was studied. The results show that the electrolytic temperature could significantly influence the surface topography, thickness and chemical composition of the oxidation films produced by ASD and, therefore, determined the layered hydroapatite (HA) deposition as the other process parameters were fixed.


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