Relevant bibliographies by topics / Harmonic reason

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Harmonic reason'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Harmonic reason"

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M.J., Sridevi, and Rajanna K.R. "Harmonic Energy of a Graph." Journal of Statistics and Mathematical Engineering 5, no. 1 (2019): 20–26. https://doi.org/10.5281/zenodo.2611226.

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Song, Xing Yu, Jing Chen, Qing Wang, and Shi Jie Deng. "Harmonic Analyzing and Filtering of Motor Discrete Variable Frequency Soft Starter." Applied Mechanics and Materials 713-715 (January 2015): 1401–4. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.1401.

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A large number of harmonic is mainly produced by with the discrete variable frequency soft starter. The harmonic during the motor soft starting is characterized by the high energy consumption and signal interference. Therefore, harmonic analyzing and filtering of motor discrete variable frequency soft starter is presented in this paper to achieve low energy consumption and ensure the motor soft starting stably. The following works have been done in the study: introduce the reason of harmonics appearance, analyze the harmonic, and present the filtering approach. The motor soft starter developed
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Mirajkar, Nilesh Balkrishna, Rajesh M. Dharaskar, Tousif G. Kazi, Rohit R. Burte, and Rakesh R. Jadhav. "Harmonics: The Distortion in Supplied Waveform – Causes and Remedies." International Journal of Current Microbiology and Applied Sciences 12, no. 5 (2023): 39–44. http://dx.doi.org/10.20546/ijcmas.2023.1205.005.

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In Industrial Distribution Power System, the use of electronic devices such as motor drives, rectifiers or converters, power supplies and power electronic devices has been increased tremendously from last decade. In such a systems, switching operations are more in their regular work. It causes distortion in supplied waveform (Harmonics). This increases the Total Harmonic Distortion (THD) of Industrial Distribution Power System which is considered as the main reason for the power quality problems. This paper includes the sources of the harmonics, effects of the harmonics and the recommendations
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Liu, Yun Yun, Jiang Zeng, and Kai Liang Wang. "A Harmonic Detecting Scheme Based on BP Neural Network." Applied Mechanics and Materials 392 (September 2013): 759–64. http://dx.doi.org/10.4028/www.scientific.net/amm.392.759.

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General harmonic detecting scheme is using the Fast Fourier Transform (FFT) for detection of all the harmonics (such as 1 to 50 times). While power units often do not care about the specific values of all the harmonics, but is only concerned with some key harmonics or several overall indicators. For the above reason, a new harmonic detecting scheme based on the algorithm of BP neural network is presented in this paper. It does not need to calculate all the harmonics, when the detection of individual indicators or overall indicators which are concerned by users can be achieved,and to achieve th
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Fei, Zhenyan, Ming Lyu, Mariano Méndez, et al. "The Harmonic Component of the Millihertz Quasi-periodic Oscillations in 4U 1636–53." Astrophysical Journal 922, no. 2 (2021): 119. http://dx.doi.org/10.3847/1538-4357/ac2501.

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Abstract We studied the harmonics of the millihertz quasi-periodic oscillations (mHz QPOs) in the neutron star low-mass X-ray binary 4U 1636–53 using the Rossi X-ray Timing Explorer observations. We detected the harmonics of the mHz QPOs in 73 data intervals, with most of them in the transitional spectra state. We found that the ratio between the rms amplitude of the harmonic and that of the fundamental remains constant in a wide range of the fundamental frequency. More importantly, we studied, for the first time, the rms amplitude of the harmonics versus energy in 4U 1636–53 in the 2–5 keV ra
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Sonmezocak, Temel, Onur Akar, and Umit Kemalettin Terzi. "High Performance Adaptive Active Harmonic Filter Design for Non-Linear LED Loads." Issue 01-2022, no. 01-2022 (February 2022): 29–38. http://dx.doi.org/10.33383/2021-083.

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Today, illumination systems use approximately 1/3 of the electrical energy produced. For this reason, new technologies constantly increase energy efficacy in illumination technology. Consequently, the use of LED type light sources gets more widespread with low power electronics-based versions. The most important advantage of this type of systems has high luminous efficacy. However, since electronic systems have non-linear static loads, they cause unwanted harmonics in electrical distribution systems. Harmonics affect the operational safety as they cause unnecessary heating of the conductors in
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Benaouadj, Mahdi, Zouhir Boumous, and Samira Boumous. "Active Harmonic Filtering for Improving Power Quality of an Electrical Network." Journal Européen des Systèmes Automatisés 55, no. 3 (2022): 397–403. http://dx.doi.org/10.18280/jesa.550312.

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The increase use of polluting equipment, especially in the field of power electronics, has caused appearance of harmonics and deterioration in the supplied current wave quality. For this reason, several harmonic pollution control methods have been developed, and the use of the active filtering presents the most efficient and appropriate solution. This work concerns improving energy quality of an electrical network by using an active parallel filter. To achieve this objective, three essential steps were pursued: identification of the harmonic currents, insertion and control of an active paralle
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Sang, Lin, Jian Cheng Ye, and Ming Pan. "Characteristic and Model Analysizes of Steady-State Harmonic Source for DC Charger." Applied Mechanics and Materials 336-338 (July 2013): 536–41. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.536.

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The objective of this paper is to present the system construction and operational principle for a DC charger of electric vehicle. By means of analyzing AC and DC sides for the chargers, a reason was derived theoretically for producing specified harmonic current while absorbing fundamental wave of electric power system. The modeling and measuring procedures of multi-harmonic source for single and multiple chargers were proposed. The summation effect of harmonics for charge/exchange station which was regard as a public coupling circuit (PCC) of the electric power system. The simulation and measu
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T., D. Dongale1 D. A. Kulkarni2 M. D. Uplane 3. "HARMONICS ANALYSIS OF FOUR SWITCH THREE PHASE INVERTER." International Journal of Information Technology, Modeling and Computing (IJITMC) 1, November (2018): 01–07. https://doi.org/10.5281/zenodo.1421496.

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In the viewpoint of reliability implication and cost effectiveness of three phase inverter, there should be less device count in inverter topology and fewer losses in the semiconductor switches. The earlier reported less device count topology by many research groups are facing the problem of Total Harmonic Distortion (THD). The imperfect design value of DC link capacitor is the main reason of Harmonic Distortion (THD) problem. The ripple in the dc link voltages of Voltage Source Inverter (VSI) is leads to additional harmonics distortion. This paper present the simulative view of minimization o
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Guo, Jia, Zhi Gang Li, Ya Ping Cheng, Kai Huang, and Chun Yan Cui. "A Method of Harmonic Current Suppression in Photovoltaic Grid-Connected Systems." Applied Mechanics and Materials 303-306 (February 2013): 1145–48. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.1145.

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The grid-connected inverter plays an important role in the photovoltaic power generation systems, the output of the grid current harmonics affect the stability of the grid. The reason of grid inverter output current distortion, a detailed analysis of current waveform control strategy and its effectiveness of the grid-connected inverter harmonic current suppression is introduced based on the d-q coordinates in this paper.
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Dissertations / Theses on the topic "Harmonic reason"

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Martin, Nathan 1978. "Rameau and Rousseau : harmony and history in the age of reason." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115640.

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Rousseau's articles on music for Diderot and d'Alembert's Encyclopedie , and to a lesser extent his Dictionnaire de musique, have rarely attracted the scholarly attention they deserve. As a result, the pivotal role that Rousseau played in the early French reception of Rameau's theory of harmony has never been fully appreciated. Far from being a quarrel over musical aesthetics, Rousseau's dispute with Rameau raised fundamental questions about the composer's theory of harmony. Rousseau interrogated the empirical adequacy of Rameau's theory, the soundness of its foundations, the logic of its deri
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Barros, Leonardo Canuto de. "O caráter ambivalente da música em Jean-Jacques Rousseau." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/8/8133/tde-15072015-153423/.

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Trata-se de investigar o caráter ambivalente da música na teoria de Jean-Jacques Rousseau. O filósofo defende, ao mesmo tempo, os traços naturais da sinfonia, que lhe concedem o acento enérgico responsável por movimentar os sentimentos do ouvinte, e os aspectos artificiais que a constituem, resultantes da moralidade necessária para que a música seja de fato expressiva. Essa conciliação entre os elementos racional (harmonia) e patético (melodia) reforça o combate do filósofo genebrino contra a teoria ramista.<br>The purpose of this masters thesis is to investigate the ambivalence of music in Je
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Wilk, Thomas M. "Hume's causal epistemology how pre-established harmony, custom and general rules confer justification /." Fairfax, VA : George Mason University, 2009. http://hdl.handle.net/1920/4569.

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Thesis (M.A.)--George Mason University, 2009.<br>Vita: p. 91. Thesis director: Theodore Kinnaman. Submitted in partial fulfillment of the requirements for the degree of Master of Arts in Philosophy. Title from PDF t.p. (viewed Oct. 11, 2009). Includes bibliographical references (p. 89-90). Also issued in print.
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Renton, Paul. "Synthesis and harmony : a study of Kant's theory of sensible experience in the Critique of pure reason." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203531.

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In this thesis I argue that Kant's model of cognition is best considered as a modified version of Locke's representationalism. My argument presents a balanced approach to reading Kant, which acknowledges that in practice the systematic nature in which we represent the world is the result of a combination of internal and external factors. The possibility of cognition rests, not only on the nature of the cognitive faculties and our capacity to represent in general, but also upon the nature of the metaphysical world and its relation to sensibility. As I present Kant, the possibility of representi
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Felice, Ana Carolina Garcia Lima. "Um estudo variacionista e fonológico sobre o alçamento das vogais médias pretônicas na fala uberlandense." Universidade Federal de Uberlândia, 2012. https://repositorio.ufu.br/handle/123456789/15419.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In the present research we performed a descriptive analysis from the rising of the middle vowels pretonic with speakers from Uberlândia - MG. Following the variational method, we conducted interviews with the goal of seeking the vernacular speech of our informants. Thus, we compose a corpus with 5.199 words from the speech of 24 informants stratified by sex, age and education level, as established by GEFONO, group of studies in phonology, cooriented by Professor José Sueli de Magalhães . In addition to the extralinguistic factors u
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Ceolin, Celina. "A equação unidimensional de difusão de nêutrons com modelo multigrupo de energia e meio heterogêneo : avaliação do fluxo para problemas estacionários e de cinética." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/96762.

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Na presente tese é resolvida a equação de difusão de nêutrons estacionária, bem como problemas de cinética, em geometria unidimensional cartesiana multi-região considerando o modelo de multigrupos de energia. Um dos objetivos e inovação neste trabalho é a obtenção de uma solução aproximada com estimativa de erro, controle de precisão e na forma de uma expressão analítica. Com esse tipo de solução não há a necessidade de recorrer a esquemas de interpolação, geralmente necessários em caso de discretizações do domínio. O fluxo de nêutrons é expandido em uma série de Taylor cujos coeficientes são
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Ross, Daniel. "Passion et raison dans le stoïcisme." Thèse, 2008. http://hdl.handle.net/1866/7502.

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Books on the topic "Harmonic reason"

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Larsen, Libby. Reasons for Loving the Harmonica: Vocal Score. Oxford University Press, 2003.

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Kachelriess, Michael. Quantum mechanics. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198802877.003.0002.

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After a brief review of the operator approach to quantum mechanics, Feynmans path integral, which expresses a transition amplitude as a sum over all paths, is derived. Adding a linear coupling to an external source J and a damping term to the Lagrangian, the ground-state persistence amplitude is obtained. This quantity serves as the generating functional Z[J] for n-point Green functions which are the main target when studying quantum field theory. Then the harmonic oscillator as an example for a one-dimensional quantum field theory is discussed and the reason why a relativistic quantum theory
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Wright, Frances. Reason, Religion, and Morals. The Rowman & Littlefield Publishing Group, 2020. https://doi.org/10.5040/9798881842086.

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Originally published as Course of Popular Lectures, the works collected in this volume display the gift for oratory and range of progressive ideas that made Frances Wright (1795-1852) both a sought-after lecturer and a controversial figure in early nineteenth-century America. Born in Scotland, this pioneering freethinker and abolitionist emigrated to America in her twenties and became friends with Thomas Jefferson and James Madison. In 1828, she joined Robert Dale Owen's socialist community at New Harmony, Indiana, and helped him edit his New Harmony Gazette. The next year she and Owen moved t
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Downing, Laura J., and Al Mtenje. Segmental Phonology: Vowels. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198724742.003.0004.

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This chapter begins with a discussion of the Chichewa vowel phoneme inventory and its relation to the Proto-Bantu vowel inventory. The distribution of vowels in different morphological and phonological positions in the word is taken up next. The remainder of the chapter is devoted to a discussion of Bantu vowel height harmony (VHH), a process that conditions the possible vowel combinations in stems in Chichewa as in many Bantu languages. Data from a range of morphological and phonological contexts is provided to show that vowel harmony patterns in Chichewa fit Hyman’s (1999b) characterization
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Hermans, Hubert J. M. The Positioning Brain. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190687793.003.0005.

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Recent developments in brain sciences and social psychology lead to a model focused on the communication channels between I-positions, connecting self with other, reason with emotion, and the conscious with the nonconscious as basic polarities of positioning. Emotional and reasoning positions, like conscious and nonconscious positions, are considered as mutually complementing opposites in both self and other. In this model the communication channels are of crucial importance as their features and qualities determine whether the positions are involved in competition or cooperation, conflict or
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Grove, Samuel. Retrieving Darwin's Revolutionary Idea. The Rowman & Littlefield Publishing Group, Inc., 2021. https://doi.org/10.5040/9781978727373.

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Darwin's discovery of evolution is as celebrated as Galileo's laws of motion or Newton's discovery of gravity. But this was only half the story. Not content to prove that evolution had happened, Darwin sought to convey its full humbling implications. Thus he formulated the theory of natural selection. Contrary to popular belief, this theory ran exactly counter to scientific reason and was consequently rejected by the scientific community of the time. This wasn’t the only reason Darwin’s critics recoiled. His theory robbed the ruling orders of any easy recourse to consolatory tales of nature’s
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Tennant, Neil. From the Logic of Evaluation to the Logic of Deduction. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198777892.003.0004.

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We deliver the details on the smooth morphing from the verification and falsification rules of the model-relative Logic of Evaluation to the model-invariant, deductive rules of Core Logic. There are good reasons for preferring the parallelized forms of certain elimination rules in natural deduction (the ones for conjunction, the conditional, and the universal quantifier) to their more conventional serial forms. We explain how ⊥ can make its way into proofs as a conclusion, as required for applications of ¬-Introduction. We discuss the notion of harmony between introduction and elimination rule
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Mitcham, Carl, and Nan Wang. Interdisciplinarity in Ethics. Edited by Robert Frodeman. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198733522.013.20.

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“Interdisciplinarity in Ethics” begins with a schematic overview of how ethics in the West has bridged (1) individuals and social orders through virtue ethics (Greece), (2) reason and revelation through deontology (medieval period), and (3) science and politics in consequentialist utilitarianism (modern period). In counterpoint, it observes how China adds to virtue ethical interdisciplinarity efforts (4) to harmonize humans with the cosmos and (5) to integrate the human inner and outer selves. From this dual historicophilosophical perspective, the chapter then examines how recent ethical chall
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Lott, Marie Sumner. String Chamber Music and Its Audiences in the Nineteenth Century. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252039225.003.0008.

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This introductory chapter discusses string chamber music, which fostered a variety of social interactions that helped build communities within communities in the nineteenth century. Chamber music for strings resists easy incorporation into the dominant narrative of musical developments centered on technological progress and compositional innovation. This is because chamber music's association with musical conservativism and orthodoxy has colored its reception since at least the 1840s. One reason for string music's apparent orthodoxy lies in the fact that stringed instruments themselves experie
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Kolin, Andrew. Irrationality of Capitalism and Climate Change. The Rowman & Littlefield Publishing Group, 2022. https://doi.org/10.5040/9781666997446.

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The overwhelming scientific evidence indicates that planet Earth is in the process of undergoing dramatic climate change, which threatens to undermine the quality of life around the world. Irrationality of Capitalism and Climate Change demonstrates how the roots of humanity's assault on the environment are directly associated with the origins of capitalism, an irrational social system in which reproduction of capital on a global scale is destructive to the environment. The author begins with a philosophical analysis of the role that reason and passion assume in social systems., then traces the
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Book chapters on the topic "Harmonic reason"

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Hu, Hong-Song. "Responses of 2DOF Sliding Base Systems Under Harmonic Ground Motions." In Sliding Base Structures. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5107-9_2.

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AbstractAlthough actual structures would not be subjected to harmonic ground motions, theoretical solutions obtained under harmonic ground motions can often provide useful information for understanding the mechanism of the structures considered. For this reason, this chapter focuses on the responses of 2-degree-of-freedom (2DOF) sliding base (SB) systems subjected to harmonic ground motions. The main contents of the present chapter include the typical response histories of a 2DOF SB system subjected to harmonic ground motions, the influence of the critical parameters on the maximum structural
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Rimas, Juozas, and Juozas Rimas Jr. "The Logic of Music." In Etudes on the Philosophy of Music. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-63965-4_20.

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AbstractThe harmonic regulation of tonal relations as “musical logic,” following J. N. Forkel. The relationship between musical logic and language (J. N. Forkel, E. Hanslick; C. Dahlhaus). Language as the house of being (M. Heidegger): musical language as a way of manifesting the being of music (its idea). The thematic logic of music (F. Schlegel). “Forms set in motion by sounding” as the sole content of music (E. Hanslick): the idea, which appears in the musical material, Hanslick called “form.” The exaltation of articulated sound to the expression of thought makes up the form of language (W.
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Gangadean, Ashok K. "Meditative Reason and the Holistic Turn to Natural Phenomenology." In Heaven, Earth, and In-Between in the Harmony of Life. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0247-6_10.

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Favaretto, Niccolò Antonio. "«Et un vergier qui fu de pris / i avoit d’eve et d’air enclos». Giardini incantati nell’Erec et Enide e nel Lai de l’oiselet (e altrove)." In Studi di letterature moderne e comparate. Firenze University Press, USiena Press, 2024. https://doi.org/10.36253/979-12-215-0602-0.09.

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The author investigates the implications underlying the reprise of the enchanted garden as the setting for the story narrated in the Lai de l’oiselet and the final duel in Chrétien de Troyes’ Erec et Enide. Through comparison with other works, the main reason for this reprise is found in the character that the vergier takes on as an ‘other’ dimension, functional to the promotion of harmony between love, chivalry and community.
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Grigorieva, Lyubov V., Leyla A. Mytareva, and Ekaterina A. Shkarupa. "Failure of the Funded Model of the Russian Pension System: Reasons and Solutions." In The Future of the Global Financial System: Downfall or Harmony. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00102-5_40.

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Kale, Varsha, Lorna Richardson, and Robert D. Finn. "Navigating bacterial taxonomy in a world of unchartered microbial organisms." In Trends in the systematics of bacteria and fungi. CABI, 2021. http://dx.doi.org/10.1079/9781789244984.0179.

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Abstract This book chapter focuses on state-of-the-art informatics techniques that perform bacterial taxonomic assertions on metabarcoding data sets and MAGs, as well as highlighting some of the advantages and disadvantages of the respective approaches and finishes by exploring why they are yet to be perfectly complementary. Currently, the results of these two approaches can be difficult to compare for the various reasons we highlight, and they are compounded by the fact that the data sets typically have different purposes. Despite the current difficulties, the field is heading in a direction
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Zelikov, Vladimir A., Yuriy V. Strukov, Vera V. Razgonyeva, Ruslan A. Korablev, and Alexander Y. Artemov. "Traffic Safety as a Factor of Competitiveness of Economic System and a Reason for Increase of Differentiation of Developed and Developing Countries: Management on the Basis of New ICT." In The Future of the Global Financial System: Downfall or Harmony. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00102-5_16.

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Szmyd, Jan. "Digital Reason vs. the Modern “Metamorphosis of Man”: From the Perspectives of the Philosophical Anthropology of Józef Bańka and Anna-Teresa Tymieniecka." In Eco-Phenomenology: Life, Human Life, Post-Human Life in the Harmony of the Cosmos. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-77516-6_40.

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Zeidel, Robert F. "Harmonic Dissidence." In Robber Barons and Wretched Refuse. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9781501748318.003.0002.

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This chapter discusses how developments during the preceding thirty years, culminating in the Great Railroad Strike of 1877, set the stage for future immigrant-related labor strife. During those years, American industrialization began in earnest, engendering a host of socioeconomic changes. Increased large-scale production led to a growing demand for workers, and when the domestic labor force could not meet employers' needs or would not accept their offered wages, business leaders turned to immigrants. The pull of American economic opportunity, coupled with the paucity of that which was availa
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De Lange, O. L., and R. E. Raab. "The Harmonic Oscillator." In Operator Methods in Quantuin Mechanics. Oxford University PressOxford, 1991. http://dx.doi.org/10.1093/oso/9780198539612.003.0002.

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Abstract In both classical and quantum physics the harmonic oscillator is one of the most important physical systems [1–4]. Furthermore, because of the simplicity and symmetry of the Hamiltonian operator, the quantum mechanical oscillator is particularly suited to analysis by abstract operator methods. For this reason the study of the one dimensional oscillator is a useful introduction to the application of operator methods in quantum mechanics. In Sections 2.1–2.4 we use these methods to determine energy eigenvalues and eigenkets, and matrix elements; the analysis is extended to isotropic mul
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Conference papers on the topic "Harmonic reason"

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Chandler, Christophe. "Environmentally Friendly Volatile Corrosion Inhibitors." In CORROSION 2001. NACE International, 2001. https://doi.org/10.5006/c2001-01194.

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Abstract Volatile corrosion inhibitors (VCIs) were originally developed to protect boilers and piping systems of ships to be mothballed. Their effectiveness and ease of application attracted early users. Over the years, the field of usage has increased to cover electronics, packaging, process industries, reinforced concrete, coatings, and metalworking fluids. Having clean parts is one of the main reasons of the ever-widening acceptance of VCIs. For example, applicators and end-users do not have to be concerned about removal and disposal as they would with petroleum-based products. A new class
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Baikabulov, F. B., P. V. Chernov, S. K. Isaev, L. S. Kornienko, A. O. Ribaltovsky, and Yu P. Yatsenko. "Correlation of UV-radiation with the process of second harmonic generation in Ge-doped optical fibers." In Nonlinear Guided-Wave Phenomena. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/nlgwp.1991.tuf4.

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To clarify the mechanism of second harmonic generation (SHG) in Ge-doped optical fibers, it is very important to know what leads to formation of permanent X(2) grating. Some of the reports [1-3] considered strong internal de fields to be the main reason for writing such gratings. In other papers [4-6] a lot of attention is paid to formation and orientation of color centers and permanent defects. In this great role can play UV-radiation due to simultaneous generation of the third or fourth harmonics.
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Ohashi, M., T. Kondo, R. Ito, et al. "Quadratic Nonlinear Optical Coefficient of AlxGai-xAs Thin Film." In Nonlinear Optics. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.md2.

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Recently there has been considerable interest in surface-emitting second-harmonic (SH) generators fabricated from the AlxGa1-xAs system.1,2) No systematic data are available, however, on the d coefficients of AlxGa1-xAs1,3,4) A major reason for this is that many interesting semiconductors, including AlxGa1-xAs, are obtainable only in the form of a thin epitaxial layer. Furthermore, the substrate is often absorptive at SH frequencies. We have developed a new method for characterizing the optical nonlinearity of such thin-film materials on the basis of the method of reflected harmonics.5) The ne
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4

Slosser, John J., and P. Meystre. "Cotangent states of the electromagnetic field." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.wdd5.

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We consider a simple quantized harmonic oscillator driven by a current of spin 1/2 particles resonant with the oscillator frequency. A possible realization of this model might be achieved in a micromaser. Our analysis shows that the system may evolve to pure states j of the field even for mixed state initial conditions. Specifically, writing the field state as |f⟩ = Σ n |n⟩ we find the two possible solutions: For this reason we call these states cotangent and tangent states of the harmonic oscillator, respectively.
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5

Khurgin, Jacob B., and S. J. Lee. "Cascaded Optical Nonlinearities: Microscopic Understanding of It as a Collective Effect." In Nonlinear Optics: Materials, Fundamentals and Applications. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/nlo.1996.nme.26.

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The third-order optical nonlinearities, whose potential for optical processing and switching has been understood for many years, have not found wide applications, for the simple reason that typical χ(3) is too small to make the devices based on it practical. Recently, however, a significant progress has been made on the way to change this unfortunate situation, by using cascaded second order nonlinear processes in order to achieve the effective third-order nonlinearity. This method, first realized in [1],[2] suggests the use of the parametric interaction between fundamental and second-harmonic
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6

Carlig, Sergiu, Profirie Bardetchi, Viorel Ciornea, and Mihai Macovei. "Anharmonic oscillator." In Conferința științifică națională cu participare internațională "Integrare prin cercetare și inovare", dedicată Zilei Internaționale a Științei pentru Pace și Dezvoltare. Moldova State University, 2025. https://doi.org/10.59295/spd2024n.108.

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The article analyzes the influence of the non-linear terms of the restoring force at large deviations from the equilibrium position of an oscillating body (non-linear oscillator). Particularly, it is demonstrated, in an accessible way,that the oscillations of the anharmonic oscillator drastically differ from thoseof a harmonic one. The main reason lies in the fact the oscillator frequency ofthe nonlinear oscillator, at large deviations, begins to depend on the amplitudeof the oscillations.
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Mayorca, Maria A., Albert Torres, Vsevolod Kharyton, and Ronnie Bladh. "Estimation of Burner-Can Induced Excitation Response of an Industrial Low Pressure Turbine Blade: Validation Against Prototype Test Data." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43393.

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Discovering vibration problems after engine prototype tests translates in increased costs and limited re-design space. For this reason numerical tools are more and more being applied to help taking correct decision in the early design. This paper presents the estimation of the vibration levels induced by hot-streaks from burner-cans in the last blade of an industrial gas turbine. The aerodynamic forcing was obtained from full wheel time marching unsteady computational fluid dynamics calculation. The results are compared with a previous calculation of a scaled sector model. Determination of dif
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Reinisch, R., E. Popov та M. Nevière. "Optical Bistability by Cascading χ(2) in Prism or Grating Couplers". У Nonlinear Guided Waves and Their Applications. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/nlgw.1995.nfa14.

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The features of second harmonic generation (SHG) in the depleted pump regime are known since the early works of N. Bloembergen et al.[1]. For some years, this kind of SHG has attracted a great deal of interest[2]. The reason is as follows : in the presence of depletion of the fundamental frequency field together with a small phase mismatch, this kind of interaction can lead to a nonlinear (NL) phase shift of several π[2]. There lies the interest of such a process.
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Pulok, Mohammad Khairul Habib, and Uttam K. Chakravarty. "A Study of the Aerodynamics of a Helicopter Rotor Blade." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11477.

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Abstract In any congested area, where a fixed-wing aircraft cannot perform, rotary-wing counterparts are the best-suited option for its vertical take-off and landing capacity. The vibration induced by the rotor blade is a significant problem in helicopter performances. Rotor aerodynamic loading, rotor dynamics, and fuselage dynamics are the elements that contribute to the vibration of a helicopter. Among these elements, the key reason for the helicopter vibration is the aerodynamic loading. Determining aerodynamic loading is one of the most important criteria to design a rotor blade and to min
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Cazzulani, G., F. Braghin, and F. Mazzocchi. "Optimized Modal Synchronized Switching Control for Flexible Structures." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9146.

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This paper focuses on the Synchronized Switching Damping (SSD) control, a semi-active vibration suppression technique based on the coupling between a mechanical structure and piezoelectric actuators. This control family is optimized for structures subjected to mono-harmonic excitation. Anyway, in the last years, different solutions to address multi-harmonic and multi-modal excitation have been developed. One of them is the so-called Modal SSD, where the switches of the shunting circuit are governed by the behavior of the modal coordinates of the structure. Although the control performance is g
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Reports on the topic "Harmonic reason"

1

Occhiali, Giovanni, Jalia Kangave, and Hamza Ahmed Khan. Taxing High Net Worth Individuals in Nigeria: Preliminary Insights and the Case of Borno State. Institute of Development Studies, 2024. http://dx.doi.org/10.19088/ictd.2024.024.

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This paper gives preliminary insights into the challenges surrounding the taxation of high net worth individuals (HNWIs) in Nigeria – first in general terms, and then with a specific focus on Borno State. The need to diversify revenue sources has become increasingly apparent against the backdrop of Nigeria's historical reliance on the export of crude oil, and is the reason why President Tinubu created a committee to harmonise the fiscal system. However, the committee has not yet touched upon the taxation of HNWIs. Drawing from key informant interviews from north-eastern Nigeria, and a two-day
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Occhiali, Giovanni, Jalia Kangave, and Hamza Ahmed Khan. Taxing High Net Worth Individuals in Nigeria: Preliminary Insights and the Case of Borno State. Institute of Development Studies, 2024. http://dx.doi.org/10.19088/ictd.2024.075.

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This paper gives preliminary insights into the challenges surrounding the taxation of high net worth individuals (HNWIs) in Nigeria – first in general terms, and then with a specific focus on Borno State. The need to diversify revenue sources has become increasingly apparent against the backdrop of Nigeria’s historical reliance on the export of crude oil, and is the reason why President Tinubu created a committee to harmonise the fiscal system. However, the committee has not yet touched upon the taxation of HNWIs. Drawing from key informant interviews from north-eastern Nigeria, and a two-day
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3

Chea, Phal, Davut Nhem, Sathya Chea, and Chankoulika BO. The Reversal of Gender Gap in Learning: Why Boys Are Falling Behind in Upper Secondary Schools. Cambodia Development Resource Institute, 2024. https://doi.org/10.64202/wp.145.202406.

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The global emphasis on addressing gender disparities in education has highlighted the importance of equitable academic achievement for policymakers, scholars, and the public. The Sustainable Development Goals (SDGs) have incorporated gender equity, emphasising the ongoing challenge of ensuring equal access to quality education worldwide. In Cambodia, traditionally a male-dominated society, a notable shift has been observed: female students are now surpassing their male counterparts in school enrolment and academic performance. This reversal has sparked significant public interest, prompting th
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