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Relevant bibliographies by topics / N. Kondratieff long waves

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Academic literature on the topic 'N. Kondratieff long waves'

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Published: 5 June 2025

Last updated: 24 June 2025

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Journal articles on the topic "N. Kondratieff long waves"

1

Andrukovich, Petr F. "GDP Dynamics as a Superposition of N. D. Kondratieff Technological Waves." Economics of Contemporary Russia, no. 2 (August 3, 2020): 7–22. http://dx.doi.org/10.33293/1609-1442-2020-2(89)-7-22.

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A review of publications on the theory of long waves by Kondratieff–Schumpeter has shown that one of the imperfect elements of this theory in the case of modeling on their basis of GDP dynamics is the correlation of the dynamics of these waves with the dynamics of the observed values of GDP. The point is that the mathematical models currently used to describe periodic fluctuations in economic activity under this theory have a horizontal trend, and when moving to describe the growing (or declining) dynamics of GDP, it is necessary to include an exogenous trend that is not related to this theory in any way. This situation violates its integrity and often serves as one of the arguments against the adequacy of this theory to real economic processes. This article proposes a model of GDP dynamics based on the superposition of long Kondratieff waves and does not require the inclusion of exogenous trend. In this model, in addition to the generally accepted parameters of long waves, namely, the beginning and length of the wave period, two new parameters arise: the magnitude of its amplitude and the rate of change of this amplitude. These parameters allow you to configure the GDP model to describe the dynamics of the GDP of different countries, taking into account their real differences in the size of GDP. The problems of verification of the parameters of the proposed model arising in connection with the multi-extremality of the function describing this model are considered. Verification of the parameters of this model on specific data is carried out on the values of US GDP for the period from 1790 to 2018. The results of testing the model showed that the superposition of long Kondratieff–Schumpeter waves well describe the dynamics of US GDP over the entire period, and the model parameters are quite consistent with their generally recognized values.

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Andrukovich, Peter F. "N.D. Kondratiev Long Wave Models for Three Large European Countries." Economics of Contemporary Russia, no. 3 (September 30, 2023): 47–66. http://dx.doi.org/10.33293/1609-1442-2023-3(102)-47-66.

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The purpose of this study is to analyze the similarities and differences in the structure of N. D. Kondratiev long waves in the economies of the three largest European countries: Germany, France and Great Britain. It is assumed that the main trend in the dynamics of the GDP of these countries – is the trend associated precisely with changes in technology, and not with the influence of ones or others exogenous factors – can be represented in the form of a superposition of long Kondratiev waves represented by a periodic function, the values of which at a given time determines the amount of value added produced over the previous time interval. Each wave is characterized by four parameters: time, length of its period, magnitude of the initial amplitude and rate of amplitude decrease. In addition, such characteristics of long waves as the duration of their latency period, the time of their entry into leading positions and duration of their leadership relative to the previous and subsequent technological waves are calculated. Five long Kondratiev waves are considered, the parameters of which are estimated in such a way as to obtain the best description of the dynamics of the GDP of a given country in terms of the deviation of the model from this dynamics. As an estimate of GDP, its values measured in international dollars (Geary–Khamis dollars) for the period from 1790 to 2020 are considered. The calculations showed that in some parameters there is a similarity in the structure of technological waves in these countries, while in others there are differences in the dynamics of their occurrence and development. In the final part of the article, the characteristics of long waves for three European countries are compared with the characteristics of long waves in the US economy over the same time period obtained in previous studies. It is also shown that the leadership durations of long waves obtained in these calculations coincide with the theoretical estimates of the periods of long waves by N. D. Kondratiev.

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Martseniuk, L. V., and T. Yu. Charkina. "TOURISM AS A WAY TO EXPAND THE HUMAN LIFE SPACE." Anthropological Measurements of Philosophical Research, no. 11 (June 27, 2017): 63–70. https://doi.org/10.15802/ampr.v0i11.105479.

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<strong>Purpose of the work</strong><strong> </strong>is to substantiate the development of railway tourism in the context of human needs in accordance with the theory of individual life space. <strong>Methodology.</strong> Theoretical and methodological basis of the study is the provisions of the economic theory, management theory, corporate governance. The rational activity of travel agencies is based on the principles of economic equilibrium; Ukrainian population demand for railway tourism was determined with the help of market research and anonymous survey; to explore the real balance between the demand for tourist rail transport and the potential of the required volume of services the paper suggests the balance method. Since any travel company is an open system and is completely dependent on environmental factors, we proposed a method for estimating the factors of internal and external environment. <strong>Originality.</strong> The element of originality is compilation of existing concepts to the definition of the individual as a subject of life property, for the understanding of human relationships and its external environment. The paper developed the issue of the ability to influence the value of human life space with the help of tourist services. <strong>Conclusions.</strong> Market research conducted by the author has shown that in Ukraine there is a certain demand for tourist transport by rail, because it is more reliable, safer and more comfortable than the road transport. It is proved that the development of a new innovative project is very timely, as it will allow: to develop tourist infrastructure of Ukraine and bring it to the domestic and foreign tourists; replenish the state and local budgets by tourists; create new jobs for the population and improve their living level; partially reduce the loss-making passenger sector by increasing the volume of rail transport; expand life space for the people of Ukraine that will allow raising the intellectual level of the individual.

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Kılıç, Sadık. "Polanyian Reconstruction of Long Waves or Marxian Intervention in Pendulums." Science & Society: A Journal of Marxist Thought and Analysis 89, no. 1 (2025): 6–25. https://doi.org/10.1177/00368237241312546.

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Marxist long-wave theoretical frameworks, such as Mandel’s works, the social structure of accumulation (SSA) theory, the world-system approach, and the regulation school, are epistemologically separate from the Kondratieff waves. After the econometric analysis of Kondratieff became famous, however, all long-wave theoretical frameworks fell under the shadow of his procedure. It poses some theoretical and empirical difficulties in capturing time-space coherence in the Marxist analyses of long waves. An epistemological rupture with Kondratieff is needed to overcome these problems and substitute Kondratieff’s waves with Polanyi’s pendulums, which could serve as leverage to overcome the space-time problem in long-wave studies. Such a chronological reconstruction opens the way for an interaction between the Polanyian double movement and Marxist long-wave calculations. This process can also be interpreted as a Marxist intervention in Polanyian pendulums. Thus, it can be shown that the essential factors driving the pendulum movements are the recurrent legitimacy crises, socioeconomic turmoil, class struggle, local and global exploitations, and asymmetrical power relations.

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Solomou, Solomos. "Non-Balanced Growth and Kondratieff Waves in the World Economy, 1850–1913." Journal of Economic History 46, no. 1 (1986): 165–69. http://dx.doi.org/10.1017/s0022050700045551.

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During 1850–1913 the growth of the world economy was not steady. The observed variations are described with the phrase “G-waves.” In contrast to Kondratieff long waves, G-waves lack a regular periodicity and amplitude.

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MAEVSKY, VLADIMIR I., and ALEXANDER A. RUBINSTEIN. "KONDRATIEFF WAVES AND MODERN MACROECONOMICS." Scientific Works of the Free Economic Society of Russia 240, no. 2 (2023): 87–110. http://dx.doi.org/10.38197/2072-2060-2023-240-2-87-110.

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This article continues the study of the reasons for the negative attitude of the mainstream to N.D. Kondratiev’s long wave (K-wave) theory, which the authors began in 2022. The authors disagree with D. Romer’s statement attributing the K-wave problem to output dynamics. This is an incorrect statement; Kondratiev specifically stated that he studied K-waves of prices, wages, etc., but not output such as GDP. Using the earlier hypothesis that K-waves manifest themselves through technical and economic indicators (for example, through capital intensity), reflecting the change in technological modes, but at the same time there is a system of countercyclical value indicators aimed at removing the negative consequences of changing technological modes, the authors conducted a series of calculations on models of shifting modes of reproduction. The purpose of the calculations: to determine the model trajectories of GDP and inflation arising from the interaction of these two types of indicators, and then to compare the model trajectories with statistical ones and, on this basis, to assess how important it is to consider the K-waves phenomenon in macromodels. The peculiarity of the calculations is that both types of indicators are introduced into the SMR model based on US statistics for the period 1946-2019. It was taken into account that capital intensity can be represented by two options: 1. statistically significant sinusoidal approximation (that is, K-waves), 2. linear approximation. Сalculations showed that the trajectories of model GDP and inflation are noticeably closer to the trajectories of statistical GDP and inflation with K-wave dynamics of capital intensity, than with its linear approximation. This means that abstraction from the K-wave dynamics of capital intensity can distort the results of macroeconomic calculations and obviously worsens the quality of forecasts. The scientific significance of this result is that, first, it indicates the real possibility of using the K-waves phenomenon in macro analysis, and second, highlights the fact that this “real possibility“ can be successfully implemented using the heterodox model of shifting mode of reproduction. Since the macroeconomic mainstream ignores K-waves, heterodox economic theory (which recognizes K-waves) gains a marked advantage over its orthodox competitor.

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Иванова and O. Ivanova. "On Analyzing the Flow of Kondratieff Economic Cycles in France." Economics 3, no. 6 (2015): 41–46. http://dx.doi.org/10.12737/16675.

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The course of economic processes in all the industrialized countries is characterized by cyclicality. Economic cycles affect the majority of spheres in any given national economy and are characterized by a variety of distinctive features. The concept of “long cycles” for a period of 40–60 years was introduced by the Soviet scientist Nikolai Kondratieff, and further these cycles have become known as the “Kondratieff long waves”. The change of cycles is associated with deep qualitative changes in the economy. Kondratieff economic cycle comprises four phases: recovery, boom, recession and depression. It is assumed that this theory of wave-like cyclical development should be comprehended as applied to the economy of France.

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Istomina, S. V., T. A. Lychagina, A. V. Pakhomov, and E. A. Pakhomova. "Forecasting the behavior of the innovative potential of an entity subject to macroeconomic regulation in terms of trends in the long Kondratieff cycle." Economic Analysis: Theory and Practice 19, no. 4 (2020): 722–44. http://dx.doi.org/10.24891/ea.19.4.722.

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Subject. We evaluate the innovative potential of an macroeconomically managed entity using our mathematical tools, field theory and vector analysis based on the Triple Helix concept. Objectives. The research analyzes whether the economic situation is predicable if we use the mathematical tools to determine the innovative potential of the macroentity and the theory of long Kondratieff waves proved by C. Perez. Methods. We review the total results, which were inferred with the mathematical tools intended to determine the innovative potential of the macroentity and the theory of Carlota Perez. Results. We forecast how the innovative potential of the macroentity will develop, referring to the Russian case, exploring the economic situation within 2000–2015, and adhering to the theory of Carlota Perez in order to detect the phase of the long Kondratieff wave. The mathematical tools helped us observe the innovative potential trends for the given period. Combining the two approaches, we managed to figure out the further trend in the economic situation for the macroentity. The tools allow to forecast further economic developments by analyzing three components of the innovative potential – factors of knowledge intensiveness, profitability, productive capabilities. Conclusions. Combining our tool and the theory of long Kondratieff waves, we conclude that Russia is about to face another technological revolution, approaching the forth phase of the Long Kondratieff Cycle. According to Carlota Perez's theory, the forth phase end is the time of great ambivalence. So, for smoother transition, we need measures to create absolutely new technologies, preserve and/or revive the existing expertise.

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Tatuzov, Viktor. "The acute problems of foreign direct investment and Western European integration: some cyclical factors." Moscow University Economics Bulletin, no. 3 (June 30, 2021): 3–19. http://dx.doi.org/10.38050/01300105202131.

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This article examines some current problems of EU and Foreign Direct Investment (FDI). Also this article generalize and illustrate in new way long waves hypothesis. The author suggests a non-customary approach to the study and forecasting of the economic life within the framework of Kondratieff approaches. Cyclical patterns were successfully used by the author in the business and in the banking sphere. Taking into account long waves, in 2009 the author warned about the possible economic crises in Russia in 2014-2015, 2020 and such crises actually happened. The aim of this article is the systematization and the adaptation of long waves approaches to the study of many acute economic problems. The hypothesis of long waves was used by the author but only as a general empirical reference point. It touches on many actual problems of world development, including the decrease of global FDI and the growth of centrifugal forces in the EU. The question is raised about the large-scale spread of coronavirus. The rapid spread of COVID-19 could have been connected with high global instability in addition to other well-known factors. Taking into account Kondratieff’s waves and many years of the author’s experience in the Russian business and in the Russian banking sphere, the author touches on a long unfavorable period of economic instability in Russian economy. Some economic advices to regulators and business in Russia are provided. Also the author concludes that it is necessary to continue studying the Kondratieff long wave hypothesis with the aim of its further successful use in forecasting.

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Аверина, Tatyana Averina, Левкина, and Nataliya Levkina. "The Results of Studying Long Economic Waves in the Kingdom of Denmark Economy." Economics 3, no. 6 (2015): 64–69. http://dx.doi.org/10.12737/16679.

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The paper presents the research results of Kondratieff cycles in the economy of Denmark based on the real per capita GDP dynamics over the period of 1820– 2008. The use of economic and mathematical modeling allowed to define the chronological frameworks of the third, the fourth and the fifth waves of economic cycles with the 50-years period.

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Dissertations / Theses on the topic "N. Kondratieff long waves"

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Prabhavathi, Kalluri. "Ultrasound-assisted synthesis of some N-heterocyclic long-chain fatty ester derivatives." Thesis, Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17592185.

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Books on the topic "N. Kondratieff long waves"

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Kondratʹev, N. D. The works of Nikolai D. Kondratiev. Pickering & Chatto, 1998.

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2

NATO Advanced Research Workshop on The Influence of Chance Events and Socioeconomic Long Waves in the New Arena of Asymmetric Warfare (2005 Covilhã, Portugal). Kondratieff waves, warfare and world security. IOS Press, 2006.

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Stoken, Dick A. The great cycle: Predicting and profiting from crowd behavior, the kondratieff wave, and long-term cycles. Probus Pub. Co., 1993.

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Solomou, Solomos. Phases of economic growth, 1850-1973: Kondratieff waves and Kuznets swings. Cambridge University Press, 1990.

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Solomou, Solomos. Phases of economic growth, 1850-1973: Kondratieff waves and Kuznets swings. Cambridge University Press, 1987.

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Nefiodow, Leo A. Der fünfte Kondratieff: Strategien zum Strukturwandel in Wirtschaft und Gesellschaft. 2nd ed. Frankfurter Allgemeine Zeitung, 1991.

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Helenius, Anttiheikki. Die ökonomische Entwicklung des Luftverkehrs im Lichte der Theorie der Kondratieff Wellen. Cuvillier, 2003.

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Kli͡ukin, P. N. Nasledie N. D. Kondratʹeva i sovremennostʹ: Sbornik stateĭ. Aleteĭi͡a, 2014.

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9

McKay, Keith. At rest 4,000 fathoms under the waves, lat. 11⁰46'N, long. 126⁰33'E, USS Hoel DD 533: The story of a valiant ship's last hours and the survivors who manned her to the end. s.n., 1996.

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Kondratev, Nikolai D., and Stephen S. Wilson. The Works of Nikolai D. Kondratiev (4 Volume Set). Pickering & Chatto Ltd, 1997.

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Book chapters on the topic "N. Kondratieff long waves"

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Marshall, Michael. "Theories of Long Waves: From Kondratieff to Mandel." In Long Waves of Regional Development. Macmillan Education UK, 1987. http://dx.doi.org/10.1007/978-1-349-18539-9_2.

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Silver, Beverly. "Class Struggle and Kondratieff Waves, 1870 to the Present." In New Findings in Long-Wave Research. Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-22450-0_11.

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Reijnders, Jan P. G. "Between Trends and Trade Cycles: Kondratieff Long Waves Revisited." In New Findings in Long-Wave Research. Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-22450-0_2.

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Grinin, Leonid, Andrey Korotayev, and Arno Tausch. "From Kondratieff Cycles to Akamatsu Waves? A New Center-Periphery Perspective on Long Cycles." In Economic Cycles, Crises, and the Global Periphery. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41262-7_4.

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Bondarenko, Valentina M. "N. D. Kondratieff's Legacy and the Role of His Views in Analyzing Modern Economic Problems and Trends." In Kondratieff Waves: Kondratieff's Theoretical Legacy: Perspectives from Modern Times. Uchitel’ Publishing House, 2023. https://doi.org/10.30884/978-5-7057-6273-6_02.

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The article describes the history of recognition of N. D. Kondratieff's ideas, especially in the field of the theory of conjuncture, regularities of its dynam-ics, and long waves of economic conjuncture. At first they were recognized abroad, and in Russia – only since the late 1980s of the 20th century. Kondratieff's legacy is much richer. He formulated methodological approaches to the analysis of what is (Sein) and what ought to be (Sollen), and analyzed the correlation between teleological and genetic methods of research. He also laid the foundations for the development of the theory of forecasting. But it is the Kondratieff's doctrine on cyclical fluctuations of long waves of economic conjuncture that is most accepted by modern scientists and is the basis for analyzing today's economic problems and trends.

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Rostow, W. W. "Relative Prices." In The Great Population Spike and After. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195116915.003.0008.

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In viewing the time ahead, especially the next quarter century, I have been inclined to conclude that the industrial progress of India, China, Southeast Asia, and the major countries of Latin America are likely to produce a phase of rising prices in foodstuffs and raw materials and increased outlays to deal with the forces of environmental degradation. It is my hypothesis that for a time, in the early part of the 21st century, these developments will outstrip the deceleration of population. The more or less regular occurrence of such phases of demand pressure has marked the story of the world economy since the end of the 18th century. At least since about 1789, there have been successive periods when foodstuffs and raw materials were expensive and then cheap, relative to manufactured goods. From 1789 to 1920, these periods lasted about 25 years. After 1920, the cycles were much less regular and were significantly affected by wars, by the successive rise in the importance of oil, by outlays to preserve the environment, and finally by the involvement more directly of politics in the setting of basic prices. But economic historians are likely to agree that the period 1789-1914 was marked by two-and-a-half long relative-price cycles in raw material versus manufactured goods (see Figure 4.1). Although he had several predecessors, N. D. Kondratieff, a Russian economist who was immortalized by Joseph Schumpeter as the discoverer of the Kondratieff cycle or long wave, identified, dated, and discussed analytically this long cycle in the interwar years. He died in one of Joseph Stalin's labor camps in Siberia. The approximate dates and length of these long cycles through 1920 are shown in Table 4.1. The successive phases of falling and rising relative prices continued to follow one another despite two world wars, a pathological interwar period, and an unexpected postwar recovery, illustrated in Table 4.2. The peak of the early 1980s came in the second quarter of 1982 (or, on an annual basis, in 1981).

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Tuncel, Cem Okan, and Ayda Polat. "Nanotechnology, Long Waves, and Future of Manufacturing Industry." In Foreign Direct Investments. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2448-0.ch092.

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This study concerns the long wave theory of capitalist development with an aim to discuss and analyze the impact of nanotechnology on manufacturing industry. Long wave theory was asserted by Russian economist Kondratieff and it states the capitalist development with subsequent cycles which last 40 to 60 years each. The theory of Kondratieff was also contributed by other scholars as Schumpeter, Freeman, and Perez. Our research attempts to review how nanotechnology contributes economic growth, and how it changes the structure of manufacturing industry at the eve of the sixth Kondratieff wave. This structure was examined by using comparative case study of European Union, East Asian Newly Industrialized Countries and Middle East and North African (MENA) countries.

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Tuncel, Cem Okan, and Ayda Polat. "Nanotechnology, Long Waves, and Future of Manufacturing Industry." In Handbook of Research on Comparative Economic Development Perspectives on Europe and the MENA Region. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9548-1.ch015.

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This study concerns the long wave theory of capitalist development with an aim to discuss and analyze the impact of nanotechnology on manufacturing industry. Long wave theory was asserted by Russian economist Kondratieff and it states the capitalist development with subsequent cycles which last 40 to 60 years each. The theory of Kondratieff was also contributed by other scholars as Schumpeter, Freeman, and Perez. Our research attempts to review how nanotechnology contributes economic growth, and how it changes the structure of manufacturing industry at the eve of the sixth Kondratieff wave. This structure was examined by using comparative case study of European Union, East Asian Newly Industrialized Countries and Middle East and North African (MENA) countries.

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Grinin, Leonid, and Andrey V. Korotayev. "Introduction.The Relevance of Kondratieff's Ideas Today." In Kondratieff Waves: Kondratieff's Theoretical Legacy: Perspectives from Modern Times. Uchitel’ Publishing House, 2023. https://doi.org/10.30884/978-5-7057-6273-6_01.

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Nikolai Kondratieff contributed significantly to various fields of econom-ics. He became famous abroad during his lifetime. One of his most outstanding works was The Basic Problems of Economic Statics and Dynamics. Among all significant contributions to a number of areas of economic science Kondratieff's theory of long cycles (waves) brought him the greatest popularity. Kondratieff was not a discoverer of long waves in economic and social dynamics, but the founder of the first scientific theory of these waves, which had already become long cycles in this theory.

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LePoire, David. "Long-Term Dynamics of Ruling Structures in the West, China, and Russia." In Kondratieff waves: Processes, Cycles, Triggers, and Technological Paradigms. Uchitel Publishing House, 2022. http://dx.doi.org/10.30884/978-5-7057-6191-3_02.

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Conference papers on the topic "N. Kondratieff long waves"

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Park, Mun-Won, Sung-Woo Cho, and Tae-In Jeon. "Enhancing N₂O Gas Sensing with Long-Range THz Pulse Propagation in Indoor and Outdoor Environments." In 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2024. http://dx.doi.org/10.1109/irmmw-thz60956.2024.10697785.

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Egorenko, Anna Olegovna, Veronika Olegovna Kozhina, and Olga Viktorovna Fomenko. "THE GLOBAL CRISIS OF 2023 AS A TRANSITION TO THE SIXTH TECHNOLOGICAL ORDER IN THE CONTEXT OF THE THEORY OF "LONG WAVES" BY N. KONDRATIEV." In Themed collection of papers from Foreign International Scientific Conference «Trends in the development of science and Global challenges» Ьу НNRI «National development» in cooperation with AFP. April 2023. - Managua (Nicaragua). Crossref, 2023. http://dx.doi.org/10.37539/230415.2023.74.59.005.

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The article shows the connection of Kondratiev's theory of long waves and the crisis of 2023 with the digital information revolution taking place in the modern world. It describes the cycles (patterns) of five long periods of development of the world economy, which have already taken place and were accompanied by recessions and rises, and also provides a forecast of the development of the leading sectors of the national economy in the context of the sixth technological order.

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Zatuliveter, Yuri. "NEW SYNERGY OF KONDRATIEV'S LONG WAVES." In Collection of scientific works of the participants of the XI International Kondratieff Conference. ISOASPSH of N.D. Kondratieff, 2020. http://dx.doi.org/10.46865/978-5-901640-34-0-2020-169-183.

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Davenet, M., G. Le Meur, B. Dany, et al. "Optimal dispersion management for N×40 Gbit/s DWDM long-haul transmissions with distributed Raman amplification." In Nonlinear Guided Waves and Their Applications. OSA, 2001. http://dx.doi.org/10.1364/nlgw.2001.tua3.

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Podliesna, Vasylyna. "Военно-экономические циклы в контексте устойчивого развития". У International Scientific-Practical Conference "Economic growth in the conditions of globalization". National Institute for Economic Research, 2023. http://dx.doi.org/10.36004/nier.cecg.i.2023.17.2.

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The article reveals the essence of the concept of military-economic cycles: they should be understood as such a form of socio-economic cyclicity, which, both in historical retrospective and in modern conditions of the formation of an information-network society, is generated by the struggle for resources that provide social units or complex social organisms - the winners in the struggle for economic and military-political leadership - the opportunity to dominate in the long term and successfully develop for some time, while maintaining stability. The cyclical nature of wars is clearly seen in the deployment of such global cycles of capitalism as the Kondratieff cycles, long cycles of world politics, and cycles of hegemony. Innovative military technologies are able to accelerate the deployment and make the militaristic component of those phases of long-term socio-economic cycles characterized by the outbreak of wars and increased instability, in particular, the upward waves of Kondratieff cycles, the “macro-resolution” phases of long cycles of world politics, the periods of thirty years of world wars in deployment cycles of hegemony. Wars are a way to resolve geopolitical contradictions, but they have a destructive effect on the natural environment, human development processes, and institutional environment, which hinders the advancement of mankind toward sustainable development, therefore, in modern conditions, it is necessary to develop and put into practice a global institutional consensus that obliges participants in geopolitical competition to interact in accordance with the law of techno-humanitarian balance, which will provide peaceful forms of resolving the contradictions of world development.

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Krijnen, Gijs J. M., George I. Stegeman, and Hugo J. W. M. Hoekstra. "Optical Power Limiting By SHG In The Čerenkov Regime." In Nonlinear Guided Waves and Their Applications. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/nlgw.1995.nthc5.

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The interest in χ(2)-materials and related nonlinear wave-propagation effects has been driven for a long time by potential applications in efficient blue-light generation by Second Harmonic Generation (SHG) and electro-optical switching [1]. From a practical point of view the interest in SHG has been dominated by guided mode - guided mode (here referred to as type A) interactions rather than by guided mode - radiation mode (type B) interactions (also called Čerenkov radiation) since in the latter case analytical relations are difficult to obtain (due to the problems associated with normalisation of radiation modes) and because the geometrical shape of the emerging SH light is not favourable. Numerical studies on type B interactions [2] have merely focused on the SHG efficiency of structures in which the index of the the core at 2 ω ( n c 2 ω ) is larger than the index of the cladding at 2 ω ( n cl 2 ω ) and in which both are larger than the effective index of the guided modes at ω ( N eff ω ) . In this paper we report on numerical investigations on type B SHG of structures with n cl 2 ω > n c 2 ω > N eff ω . We find that in the Čerenkov regime the depletion of the fundamental can be almost complete when there is phase-matching to a leaky mode at 2ω due to the high propagation losses (10-1000 dB/cm) of these modes [3], The increasingly more complete conversion with increasing input power makes this type of interaction very interesting for optical power limiting of the input beam at co. Benefits of this scheme are a large dynamic range, the potential absence of heating (because it does not require intrinsic absorption), adjustable limiting levels and a wide wavelength bandwidth.

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Loparo, Zachary E., Joseph G. Lopez, Sneha Neupane, Subith S. Vasu, William P. Partridge, and Konstantin Vodopyanov. "Time-Resolved Measurements of Intermediate Concentrations in Fuel-Rich n-Heptane Oxidation Behind Reflected Shock Waves." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63344.

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The chemical kinetics of the oxidation of n-heptane (C7H16) — an important reference compound for real fuels — are well studied at stoichiometric and lean conditions. However, there is only limited information on the chemical kinetics of fuel-rich combustion. In order to improve the accuracy of chemical kinetic models at these conditions, the oxidation of rich n-heptane mixtures has been investigated. Combustion of n-C7H16/O2/Ar mixtures at equivalence ratios, ϕ, of 2.0 behind reflected shock waves has been studied at temperatures ranging from 1075 to 1418K and at pressures ranging from 1.6 to 1.9atm. Reaction progress was monitored by recording ethylene (C2H4) concentration time-histories and initial n-heptane decay rates at a location 2cm from the endwall of a 13.4m long, 14cm inner diameter shock tube. Ethylene and n-heptane concentration time-histories were measured using absorption spectroscopy at 10.532μm from a tunable CO2 laser and at around 3.4μm from a continuous wave distributed feedback interband cascade laser (ICL), respectively. The measured concentration time-histories were compared with modeled predictions from the Lawrence Livermore National Lab (LLNL) detailed n-heptane reaction mechanism. To the best of our knowledge, the current data are the first time-resolved n-heptane and ethylene concentration measurements conducted in a shock tube at these conditions.

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Li, Ruo-ding, and Thomas Erneux. "Bifurcation to Standing and Traveling Waves in Large Laser Arrays." In Nonlinear Dynamics in Optical Systems. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nldos.1992.thb5.

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Arrays of semiconductor diode lasers are promising devices for applications that require high optical power from a laser source (high-speed optical recording, high-speed printing, free-space communications, pumping of solid-state lasers) [1]. Experimental and numerical studies of arrays consisting of a small number of lasers have shown that they are unstable devices and may exhibit a large variety of spatio-temporal responses [2-5]. In order to control these instabilities by various external mechanisms (injection locking, periodic modulations), systematic bifurcation studies are needed. The laser equations are however stiff and accurate solutions for a large population of lasers require long computation times. Asymptotic methods based on the limit of weak coupling [6] also fail to provide simple phase equations because the semiconductor laser is not a limit cycle oscillator. We have recently reformulated the laser equations as a weakly perturbed system of coupled conservative oscillators which eliminate part of the stifness of the problem and allow an analytical study of the first Hopf bifurcation as the coupling strength is progressively increased. If N is even, the Hopf bifurcation is simple and corresponds to a transition from a nonuniform steady state to a time periodic standing wave solution [7]. However, if N is odd, bifurcation to periodic standing and traveling wave solutions are both possible. This multiple bifurcation problem is difficult analytically but can be simplified if we consider the limit N large.

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Simão, Marina Leivas, Paulo Maurício Videiro, Luis Volnei Sudati Sagrilo, and Mauro Costa de Oliveira. "An Efficient Full Long-Term Approach for Mooring Systems Extreme Response Estimation Using a Multi-Dimensional Joint Environmental Model." In ASME 2024 43rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/omae2024-123671.

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Abstract In the long-term scenario, the environmental actions to which floating offshore structures are subjected to, such as waves, wind and current, are non-stationary processes. However, this long-term behavior is usually modeled as a series of short-term stationary conditions. In a full long-term analysis approach (FLTA), an estimate of the N-year response can be obtained through an integration of short-term peaks probability distributions over all these short-term environmental conditions. This paper applies an innovative and more efficient full long-term integration method based on the Importance Sampling Monte Carlo Simulation (ISMCS) method, where the uniform distribution is used as the sampling function. In parallel, a multi-dimensional joint environmental model that statistically describes all relevant environmental parameters is developed, contemplating linear and directional variables, and treating wind sea and swell waves individually. The methodology is applied for two FPSO systems installed in Brazilian deep waters. It is shown through a Bootstrap procedure that ISMCS is a numerically stable procedure and provides reliable estimates for the long-term N-year response with a feasible number of required numerical simulations. It is also shown that it can be a powerful tool to account for the simultaneous occurrence of wind sea and swell waves in structural response evaluations and that its use can lead to more accurate extreme tension response estimates, without being overly conservative.

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Simão, Marina Leivas, Paulo Maurício Videiro, Mauro Costa de Oliveira, and Luis Volnei Sudati Sagrilo. "An Efficient Importance Sampling Method for the Long-Term Mooring Lines Response Estimation Considering Wind Sea and Swell." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18175.

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Abstract Escalating demand in the oil and gas industry has led offshore structures to be installed in ever deeper waters and under severe environmental conditions. As the mooring system is a crucial element in floating offshore structures, a reliable estimation of its long-term response is a decisive step in any usual design procedure. In the long-term scenario, the environmental actions to which these structures are subjected to, such as waves, wind and current, are non-stationary processes. However, this long-term behavior is usually modeled as a series of short-term stationary conditions (typically 3-h). In a full long-term analysis approach, an estimate of the long-term N-year response can be obtained through a multidimensional integration over all these short-term environmental conditions. In this paper, this multidimensional integral is numerically evaluated by means of the Importance Sampling Monte Carlo Simulation (ISMCS) method, where the uniform distribution is used as the sampling function. Thus, all short-term environmental conditions have the same probability of being sampled, which assures that conditions with very low original probability of occurrence, but with knowingly higher contributions to the long-term response, are efficiently accounted for. The random variability of the short-term environmental parameters and their interdependencies are represented by a simplified joint probabilistic model which comprehends both wind sea and swell waves. The methodology is numerically validated for an idealized single-degree-of-freedom (SDOF) model and later investigated for a mooring line connected to an FPSO installed in Brazilian deep waters. It is shown that ISMCS provides good estimates for the long-term N-year response with a moderate amount of required simulations and can be a powerful tool in order to account for simultaneous occurrence of wind sea and swell waves in structural response evaluations.

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