scholarly journals Stabilization of cyclic processes by slowly varying forcing

2021 ◽  
Vol 31 (12) ◽  
pp. 123129
Author(s):  
J. Newman ◽  
M. Lucas ◽  
A. Stefanovska
Keyword(s):  
Cyclic Processes

Processes and Responses

2017 ◽  
Author(s):  
Jochen Rau
Keyword(s):  
Heat Engine ◽  
Cyclic Process ◽  
Free Enthalpy ◽  
Initial State ◽  
Thermodynamic Potentials ◽  
Grand Potential ◽  
Laws Of Thermodynamics ◽  
Cyclic Processes ◽  
Energy Exchanges ◽  
Thermodynamic Processes

Thermodynamic processes involve energy exchanges in the forms of work, heat, or particles. Such exchanges might be reversible or irreversible, and they might be controlled by barriers or reservoirs. A cyclic process takes a system through several states and eventually back to its initial state; it may convert heat into work (engine) or vice versa (heat pump). This chapter defines work and heat mathematically and investigates their respective properties, in particular their impact on entropy. It discusses the roles of barriers and reservoirs and introduces cyclic processes. Basic constraints imposed by the laws of thermodynamics are considered, in particular on the efficiency of a heat engine. The chapter also introduces the thermodynamic potentials: free energy, enthalpy, free enthalpy, and grand potential. These are used to describe energy exchanges and equilibrium in the presence of reservoirs. Finally, this chapter considers thermodynamic coefficients which characterize the response of a system to heating, compression, and other external actions.

Generic Profit Singularities in Time-Averaged Optimization for Cyclic Processes in Polydynamical Systems

2014 ◽  
Vol 199 (5) ◽  
pp. 510-534
Author(s):  
A. A. Davydov ◽  
H. Mena-Matos ◽  
C. S. Moreira
Keyword(s):  
Cyclic Processes

Recupero di energia dai rifiuti: dall'economia del danno all'economia del benessere

2009 ◽  
pp. 56-66
Author(s):  
Andrea Masullo
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
External Environment ◽  
Natural Systems ◽  
Positive Effects ◽  
Cyclic Processes ◽  
Economical System ◽  
Far From Equilibrium ◽  
Economical Process ◽  
It Success

- The organization of an economical system is based on a flux of energy and materials that receive from the external environment. In nature evolution move systems to a growing efficiency in circulating energy and materials to let them producing positive effects implementing the internal organization, to create new opportunities to move far from equilibrium, to create differences. But while natural systems operate cyclic processes, economical systems are linear, and using concentrated resources as input and producing wastes that spread in the environment in a way that make them no more reusable, as much it success in growth as much it approximate its end. From an energy life cycle analysis of a material used in an economical process we can see that is much more efficient reuse goods and recycle materials than incinerate them. For instance we study the case of a PET bottle to deduce that reusing 20 times a 50g PET bottle can save 5 times more energy than electricity produced by burning 20 one-use 25g bottles in an incinerator.

Risk Factors in Equilibrium Models of Open Economies

2010 ◽  
pp. 23-28
Author(s):  
D. Kuz'min
Keyword(s):  
Risk Factors ◽  
Financial Crisis ◽  
Financial Markets ◽  
Global Financial Crisis ◽  
Household Consumption ◽  
Equilibrium Models ◽  
Government Consumption ◽  
Cyclic Processes ◽  
The Usa ◽  
Liquidity Crisis

World liquidity crisis, which started in the USA in 2007, is reputed to be the first full-fledged global financial crisis. The liquidity crisis became global exactly due to the influence of large economies' national financial markets on many small ones. The analysis of the crisis expansion and development in these states (the USA, China, Iceland, Mexico, CEE countries) demonstrated that not only working accounts and reserves, but also foreign and internal borrowings, and therefore, household consumption, investments and government consumption proved to be affected by cyclic processes.

scholarly journals On life cycle of a phrase (a case study of German language)

Litera ◽  
2020 ◽  
pp. 9-20
Author(s):  
Daniil Andreevich Bakhmatov
Keyword(s):  
Life Cycle ◽  
German Language ◽  
Life Cycle Model ◽  
Cycle Model ◽  
Single Process ◽  
Cyclic Processes ◽  
The Subject ◽  
Definition Of ◽  
Diachronic Changes

The goal of this research consists in identification and complex description of the stages of existence of a phrase. The subject of this research is changes in the use that afflict phrases in diachrony. The author determines the types of such changes, which characterize the stages of existence of a phrase since its emergence, as well as possible ways of development of a phrase (in terms of unchangeability of its composition and level of idiomaticity).Based on the material of verbal-nominal phrases in German language, both free and phraseologisms, and attraction of corpus-based data, the changes in use are perceived as elements of a single process. The scientific novelty lies in the attempt to describe the models of diachronic changes as cyclic processes; reveal common trends in development of phrases and in applicability of the definition of “life cycle” to the indicted processes. The concept of “life cycle”, used in various sciences for designating the natural, repeating processes, found its reflection in linguistics. However, cyclic processes in phraseology yet remain unstudied, despite the existing description of such phenomena as usualization, phraseologization, and dephraseologization. In conclusion, the author presents a dynamic model of life cycle of a phrase; the changes in use are viewed as its part; as well as offers the terms “deusualization” and “reusualization”. The obtained life cycle model can find application in further research in the area of diachronic phraseology and phrase formation.

scholarly journals Beyond Random Causes: Harmonic Analysis of Business Cycles at the Moscow Conjuncture Institute

2021 ◽  
Author(s):  
Marco Paulo Vianna Franco ◽  
Leonardo Costa Ribeiro ◽  
Eduardo da Motta e Albuquerque
Keyword(s):  
Fourier Transform ◽  
Business Cycles ◽  
Harmonic Analysis ◽  
Research Agenda ◽  
Random Events ◽  
Cyclic Processes ◽  
Push Forward ◽  
The Fourier Transform

This article proposes a historical assessment of harmonic analysis of business cycles and its ability to both decompose and build cycles, as received at the Moscow Conjuncture Institute. It traces how the Fourier transform arrived at the Institute, mediated by Henry L. Moore, in the works and actions of Albert Vainshtein, Nikolai Chetverikov, and Nikolai Kondratiev, ultimately leading to Eugen Slutsky’s well-known 1927 article The Summation of Random Causes as the Source of Cyclic Processes. Although the evidence does not warrant the assumption that there was an orchestrated effort at the Institute to push forward a research agenda on harmonic analysis of business cycles, it certainly unfolded as more than the summation of random events and individual incursions. Moreover, the Institute as a whole could have produced much more on this matter if it had escaped Stalinist oppression for at least a few more years.

scholarly journals STUDENTS’ COGNITIVE PROCESSES IN SOLVING PROBLEM RELATED TO THE CONCEPT OF AREA CONSERVATION

2019 ◽  
Vol 10 (1) ◽  
pp. 21-36 ◽  
Author(s):  
Rooselyna Ekawati ◽  
Ahmad Wachidul Kohar ◽  
Elly Matul Imah ◽  
Siti Maghfirotun Amin ◽  
Shofan Fiangga
Keyword(s):  
Problem Solving ◽  
Cognitive Processes ◽  
Cognitive Process ◽  
Low Achievers ◽  
High Achievers ◽  
Seventh Graders ◽  
Test Results ◽  
Area Formula ◽  
High Achiever ◽  
Cyclic Processes

This study aimed to determine the cognitive process employed in problem-solving related to the concept of area conservation for seventh graders. Two students with different mathematical ability were chosen to be the subjects of this research. Each of them was the representative of high achievers and low achievers based on a set of area conservation test. Results indicate that both samples performed more cyclic processes on formulating solution planning, regulating solution part and detecting and correcting error during the problem-solving. However, it was found that the high achiever student performed some processes than those of low achiever. Also, while the high achiever student did not predict any outcomes of his formulated strategies, the low achiever did not carry out the thought process after detecting errors of the initial solution gained. About the concept of area conservation, the finding also reveals that within the samples’ cognitive processes, the use of area formula come first before students decided to look for another strategy such as doing ‘cut-rotate-paste’ for the curved planes, which do not have any direct formula. The possible causes of the results were discussed to derive some recommendation for future studies.

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