Relevant bibliographies by topics / Fluctuation strength

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

Academic literature on the topic 'Fluctuation strength'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Fluctuation strength"

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Tan, Linwei, Weidong Shi, Desheng Zhang, Ling Zhou, and Chuan Wang. "Numerical and experimental investigations of pressure fluctuations in single-channel pumps." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 4 (2017): 397–415. http://dx.doi.org/10.1177/0957650917736964.

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To elucidate the characteristics and generation mechanism of pressure fluctuations in single-channel pumps, the unsteady flow in three single-channel pumps with the same impeller equipped with a spiral volute (model 1), a circular volute (model 2), and a torus (model 3) were analyzed by computational fluid dynamics. Experiments on global performance characteristics in the volute of model 1 were performed, and fast response pressure sensors were installed in the spiral volute to measure pressure fluctuations. The results indicate that the numerical results are in good agreement with the experimental results. This study shows that a phase delay exists between different volute monitoring points and the pressure fluctuations in the volute are mainly caused by the potential interactions between the impeller blade and volute wall. Comparison of the pressure fluctuations amplitude of the impeller outlet shows that pressure fluctuation amplitude of model 3 is one order of magnitude lower than those of the others and the wake at the impeller outlet played an important role in pressure fluctuations. The standard deviation of pressure was introduced to describe the pressure fluctuations strength. It shows that the pressure fluctuation strength of the pressure surface is apparently higher than that of the suction surface, and the maximum pressure fluctuation strength in the blade is consistent with the flow separation area, indicating that flow separation is also an important factor for pressure fluctuations in single-channel pumps.
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Ren, Baosheng, Junji Noda, and Koichi Goda. "OS16-1-5 Strength Evaluation of Green Composites with Fluctuation in Fiber Orientation." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2011.10 (2011): _OS16–1–5—. http://dx.doi.org/10.1299/jsmeatem.2011.10._os16-1-5-.

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Zhou, Tingting, Ming-Jun Zhang, and Chen Li. "A Model for Calculating Psychoacoustical Fluctuation Strength." Journal of the Audio Engineering Society 63, no. 9 (2015): 713–24. http://dx.doi.org/10.17743/jaes.2015.0070.

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WU, YIN-ZHONG, WEI-MIN ZHANG, MING-RONG SHEN, and ZHEN-YA LI. "EFFECTS OF INTERFACIAL PSEUDO-SPIN COUPLING FLUCTUATIONS ON THE DIELECTRIC PROPERTIES OF FERROELECTRIC SUPERLATTICES." International Journal of Modern Physics B 19, no. 20 (2005): 3193–203. http://dx.doi.org/10.1142/s0217979205032036.

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Using effective-field theory with correlations, we investigate the effects of interfacial pseudo-spin coupling fluctuations on the susceptibility and polarization of ferroelectric superlattices within the framework of transverse Ising model. It is found that the interfacial coupling fluctuations increase the susceptibility in the low temperature region. For a strong interfacial coupling, the phase transition temperature decreases with the strength of fluctuations of the interfacial coupling. The dependence of the susceptibility on the superlattice period of BaTiO 3/ SrTiO 3 are plotted for different interfacial coupling fluctuations strength. At room temperature, when the interfacial coupling fluctuation increases, the peak position of the susceptibility will shift to a large superlattice period.
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Raubold, Imke, and Reinhard Weber. "Categorical assessments on fluctuation strength of synthesized sounds." Journal of the Acoustical Society of America 105, no. 2 (1999): 1235. http://dx.doi.org/10.1121/1.426639.

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Wang, Wei, Yuan Zhong, K. Lu, Lei Lu, David L. McDowell, and Ting Zhu. "Size effects and strength fluctuation in nanoscale plasticity." Acta Materialia 60, no. 8 (2012): 3302–9. http://dx.doi.org/10.1016/j.actamat.2012.03.016.

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ALEXANDER, A. B., C. T. RAYNOR, D. L. WIGGINS, M. K. ROBINSON, C. C. AKPOVO, and J. A. JOHNSON. "Turbulence changes from magnetic fields in a stationary plasma." Journal of Plasma Physics 77, no. 4 (2010): 537–45. http://dx.doi.org/10.1017/s0022377810000711.

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AbstractWhen the krypton plasma in a DC glow discharge tube is exposed to an axial magnetic field, the turbulent energy and the characteristic dominant mode in the turbulent fluctuations are systematically and unexpectedly reduced with increasing magnetic field strength. When the index measuring the rate of transfer of energy through fluctuation scales is monitored, a lambda-like dependence on turbulent energy is routinely observed in all magnetic fields. From this, a critical turbulent energy is identified, which also decreases with increasing magnetic field strength.
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Lianshou, Liu, Fu Jinghua, and Wu Yuanfang. "Scaling exponents and fluctuation strength in high energy collisions." Physics Letters B 444, no. 3-4 (1998): 563–68. http://dx.doi.org/10.1016/s0370-2693(98)01422-1.

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Aiba, Hirokazu, Shoujirou Mizutori, and Toru Suzuki. "Fluctuation properties of strength function phenomena: A model study." Physical Review E 56, no. 1 (1997): 119–30. http://dx.doi.org/10.1103/physreve.56.119.

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Wickelmaier, Florian, and Wolfgang Ellermeier. "Scaling the perceived fluctuation strength of frequency‐modulated tones." Journal of the Acoustical Society of America 115, no. 5 (2004): 2600. http://dx.doi.org/10.1121/1.4784566.

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Dissertations / Theses on the topic "Fluctuation strength"

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Melo, Gertrudes Nunes de. "Estimula??o transcraniana por corrente cont?nua e a flutua??o de for?a em idosas durante exerc?cio isom?trico." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14615.

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Made available in DSpace on 2014-12-17T14:44:17Z (GMT). No. of bitstreams: 1 GertrudesNM_DISSERT.pdf: 3164686 bytes, checksum: e4de9859908d8c6840498816188878f8 (MD5) Previous issue date: 2013-02-28<br>The fluctuacion force has been increasingly used in studies with elderly as a good predictor of performance and functionality of the motor. However, most analyzes the fluctuation of force in one session. Thus, identifying the minimum amount of sessions needed for familiarization with the fluctuation strength in isometric exercise become relevant. Furthermore, to investigate the effects of applying transcranial direct current stimulation (tDCS) associated with regular exercise on rates fluctuation task force is extremely important. In the first experiment, volunteers were subjected to a protocol marked by a familiarization session to establish the parameters of VCM and eight sessions with intensity of 30% MVC in office. It was observed that two familiarization sessions are required so there is a fluctuation stabilizing force. In experiment II, subjects performed an isometric contraction before and after applying tDCS (cathode, anode and sham) applied to M1. ETCC anodic effectively contributed to reducing the fluctuation of force during isometric exercise in the elderly, while the cathodic caused the increased levels of strength fluctuation. It was concluded that there is a need to implement a familiarization protocol with at least two sessions to avoid possible misunderstandings of measurements in tests of fluctuacion force. Besides that tDCS interfered with the behavior of the oscillations of force, with cathodic promoting increased fluctuation strength and anodic contributed to greater stability, demonstrating the potential of this technique neuromodulation associated with exercise as rehabilitation tools<br>A flutua??o de for?a tem sido cada vez mais utilizada em estudos com idosos como um bom preditor de desempenho e funcionalidade da motricidade. No entanto, a maioria analisa a flutua??o de for?a em sess?o ?nica. Assim, identificar a quantidade de sess?es m?nimas necess?rias para a familiariza??o ao teste de flutua??o de for?a em exerc?cio isom?trico tornar-se pertinente. Al?m disso, investigar os efeitos da aplica??o da Estimula??o Transcraniana por Corrente Cont?nua (ETCC) associada ? pr?tica regular de exerc?cio sobre os ?ndices de flutua??o de for?a ? tarefa de extrema relev?ncia. No experimento I, volunt?rias foram submetidas a um protocolo de familiariza??o marcado por uma sess?o para estabelecer os par?metros de CVM e oito sess?es com intensidade de 30%CVM em exerc?cio. Observou-se que duas sess?es de familiariza??o s?o necess?rias para que haja uma estabiliza??o da flutua??o de for?a. No experimento II, volunt?rias realizaram uma contra??o isom?trica antes e ap?s a aplica??o de ETCC (cat?dica, an?dica e sham) aplicada ao M1. ETCC an?dica contribuiu efetivamente para a redu??o da flutua??o de for?a em idosos durante exerc?cio isom?trico, enquanto que a cat?dica provocou o aumento dos ?ndices de flutua??o de for?a. Concluiu-se que h? a necessidade de aplica??o de um protocolo de familiariza??o com pelo menos duas sess?es para que sejam evitados equ?vocos de mensura??es em testes de avalia??o da flutua??o de for?a. Al?m de que a ETCC interferiu no comportamento das oscila??es de for?a, com cat?dica promovendo aumento da flutua??o de for?a e a an?dica contribuiu para uma maior estabilidade, demonstrando o potencial dessa t?cnica de neuromodula??o associada ao exerc?cio como ferramentas de reabilita??o
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Braunagel, Michael John. "A Modified Split Hopkinson Pressure Bar Approach for Assessing the Effect of Oscillatory Stress Fluctuations on Rock Strength." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1542723964568955.

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Yu, Chang-Ching, and 俞長青. "Changes of regional cerebral blood flow in Alzheimer''s patients analyzed by the techniques of 99mTc-HMPAO single photon emission computed tomography combined with image strength of fluctuation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/92556837419496625696.

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碩士<br>高雄醫學大學<br>醫學研究所<br>98<br>Objectives: To compare the effectiveness of both image strength fluctuation (ISF) and statistical parametric mapping (SPM) for analyzing cerebral blood flow traced by single photon emission computed tomography (SPECT) in patients with Alzheimer’s disease (AD). Materials and methods: This retrospective study included the comtrol group having 30 healthy subjects (17 men and 13 women; mean age, 41.2 ± 22.9 years) with normal cerebral blood flow, as revealed by computed tomography, magnetic resonance imaging, and 99m technetium hexamethyl propylene-amine-oxime (99mTc-HMPAO) SPECT. Images were interpreted by nuclear medicine physicians. The experimental group comprised 30 patients (16 men and 14 women; mean age, 76.5 ± 9.4 years) with clinically diagnosed AD. After normalization and smoothing data by the SPECT template of the SPM software, I analyzed the differences in the cerebral blood flow between two groups. The ISF method also revealed unusual fluctuation of the image strength range by using Z score analysis. The hot and cold areas were obtained as the difference appeared between normal and abnormal images. Analysis of the gray intensities of cold and hot areas was used to show cold and hot characteristic points and correlated with brain functional areas. Results: The results of SPM analysis revealed significantly reduced blood flow in bilateral inferior parietal lobule, the middle or superior gyrus of the left temporal lobe, and the superior gyrus as well as the sublobar insula of the right temporal lobe. The results from SPM were similar to those obtained with ISF showing same regions (83.3%). Conclusion: For analyzing the cerebral blood flow of AD patients traced by 99mTc HMPAO brain SPECT, the results obtained by the ISF method based on the Z-score method were almost the same as those by SPM.
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Castillo, Gonzalo C. "Fluctuations of year-class strength in petrale sole (Eopsetta jordani) and their relation to environmental factors /." 1992. http://hdl.handle.net/1957/10079.

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Books on the topic "Fluctuation strength"

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Wigmans, Richard. Fluctuations. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786351.003.0004.

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The energy resolution, i.e. the precision with which the energy of a showering particle can be measured, is one of the most important characteristics of a calorimeter. This resolution is determined by fluctuations in the absorption and signal formation processes. In this chapter, the different types of fluctuations that may play a role are examined, and their relative practical importance is addressed. Sources of fluctuations include fluctuations in the number of signal quanta, sampling fluctuations, fluctuations in shower leakage, as well as a variety of instrumental effects. Since the energy dependence of the different types of fluctuations is not the same, different types of fluctuations may dominate the energy resolution at low and and at high energies. An important type of fluctuations is part of the non-compensation phenomena. It concerns fluctuations in the strength of the electromagnetic component of hadronic showers. The effects of these fluctuations, which typically dominate the energy resolution for hadron and jet detection, are examined in detail. In sampling calorimeters, one particular shower particle may sometimes have catastrophic effects on the calorimeter performance. Several examples of such cases are discussed.
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Quirk, Paul J., ed. The United States and Canada. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190870829.001.0001.

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This edited volume compares the political systems of the United States and Canada, focusing on the effects of political institutions, and their interaction with political values and other factors, in policymaking. It explores the differences between the American presidential (or separation-of-powers) system and the Canadian parliamentary system. It also considers institutional differences such as federalism, bureaucratic leadership, and judicial definitions of citizens’ rights. It deals mainly with the period from the mid-20th century to the present but also discusses recent developments—especially the Trump presidency. The first section addresses political culture and institutions and considers political values, party and electoral systems, executive leadership and the legislative process, bureaucracy and civil service influence, and federalism. The second section addresses policymaking and outcomes, including economic policy, environmental policy, morality issues, social policy, managing diversity, and selected societal outcomes. The conclusion discusses prospects and challenges for both political systems and finds that policy differences between the two countries have diverse causes—from geography and demography, to political values, to institutional structures. The effects of institutions are often crucial, but they depend heavily on interactions with other political circumstances. Even modest, incremental change in the electoral strength or ideological tendencies of the political parties can transform institutional performance. Thus, Canada’s historic center-left moderation may be on the brink of giving way to wider ideological fluctuation and the U.S. political system was increasingly dysfunctional, even before the election of Donald Trump as president led to chaos in policymaking and the threat of severe constitutional crisis.
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Castillo, Gonzalo C. Fluctuations of year-class strength in petrale sole (Eopsetta jordani) and their relation to environmental factors. 1992.

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Castillo, Gonzalo C. Fluctuations of year-class strength in petrale sole (Eopsetta jordani) and their relation to environmental factors. 1992.

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Ramani, Ramachandran, ed. Functional MRI. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190297763.001.0001.

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Functional MRI with BOLD (Blood Oxygen Level Dependent) imaging is one of the commonly used modalities for studying brain function in neuroscience. The underlying source of the BOLD fMRI signal is the variation in oxyhemoglobin to deoxyhemoglobin ratio at the site of neuronal activity in the brain. fMRI is mostly used to map out the location and intensity of brain activity that correlate with mental activities. In recent years, a new approach to fMRI was developed that is called resting-state fMRI. The fMRI signal from this method does not require the brain to perform any goal-directed task; it is acquired with the subject at rest. It was discovered that there are low-frequency fluctuations in the fMRI signal in the brain at rest. The signals originate from spatially distinct functionally related brain regions but exhibit coherent time-synchronous fluctuations. Several of the networks have been identified and are called resting-state networks. These networks represent the strength of the functional connectivity between distinct functionally related brain regions and have been used as imaging markers of various neurological and psychiatric diseases. Resting-state fMRI is also ideally suited for functional brain imaging in disorders of consciousness and in subjects under anesthesia. This book provides a review of the basic principles of fMRI (signal sources, acquisition methods, and data analysis) and its potential clinical applications.
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Hummer, Hans. Disambiguation in the Twentieth Century. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198797609.003.0004.

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During the twentieth century historians and structural anthropologists developed kinship into a method for laying bare the mechanisms of history and human sociality. French Annaliste historians such as Marc Bloch and George Duby promoted kinship as a natural and primordial social structure, its vitality fluctuating in inverse proportion to the strength of institutions and the state. At the same time, German-language scholars refined kinship into a method for investigating the medieval aristocracy. This chapter examines the prosopographical research program advocated by Karl Schmid and Gerd Tellenbach, its intersection with the French sociological tradition, and the belief by the 1970s that the study of kinship could reveal the elemental processes of history. It concludes with the rebellion against structuralism and critiques the biogenetic and genealogical presuppositions that underpin the study of medieval kinship.
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Cohen, Jeffrey A., Justin J. Mowchun, Victoria H. Lawson, and Nathaniel M. Robbins. A 41-Year-Old Male with Foot Drop and Malaise. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190491901.003.0018.

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Distal, symmetric polyneuropathy can occur in a number of conditions including in association with HIV infection. The most common neurologic complication of HIV infection is a painful, distal sensory polyneuropathy (HIV-DSP). Other neuromuscular manifestations of HIV are myriad especially in the setting of fluctuating immunocompetence and the potential impact of neurotoxic medications. In the patient described in the case, peroneal neuropathy as the cause for foot drop is suggested by ankle dorsiflexion and eversion weakness with preservation of inversion and knee flexion strength. Mononeuropathy in the setting of HIV should prompt consideration of vasculitic, lymphomatous, and infectious causes, some of which can manifest with systemic findings. A rare neuromuscular complication of HIV-infected patients with sicca symptoms suggestive of Sjogren’s syndrome is diffuse infiltrative lymphocytosis syndrome. This syndrome can manifest as an acute or subacute painful sensory polyneuropathy but also as a mononeuropathy multiplex. This is discussed in the chapter.
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Lattman, Eaton E., Thomas D. Grant, and Edward H. Snell. Biological Small Angle Scattering. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199670871.001.0001.

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The technique of small angle solution scattering has been revolutionized in the last two decades. Exponential increases in computing power, parallel algorithm development, and the development of synchrotron, free-electron X-ray sources, and neutron sources, have combined to allow new classes of studies for biological specimens. These include time-resolved experiments in which functional motions of proteins are monitored on a picosecond timescale, and the first steps towards determining actual electron density fluctuations within particles. In addition, more traditional experiments involving the determination of size and shape, and contrast matching that isolate substructures such as nucleic acid, have become much more straightforward to carry out, and simultaneously require much less material. These new capabilities have sparked an upsurge of interest in solution scattering on the part of investigators in related disciplines. Thus, this book seeks to guide structural biologists to understand the basics of small angle solution scattering in both the X-ray and neutron case, to appreciate its strengths, and to be cognizant of its limitations. It is also directed at those who have a general interest in its potential. The book focuses on three areas: theory, practical aspects and applications, and the potential of developing areas. It is an introduction and guide to the field but not a comprehensive treatment of all the potential applications.
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Tiwari, Sandip. Semiconductor Physics. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198759867.001.0001.

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A graduate-level text, Semiconductor physics: Principles, theory and nanoscale covers the central topics of the field, together with advanced topics related to the nanoscale and to quantum confinement, and integrates the understanding of important attributes that go beyond the conventional solid-state and statistical expositions. Topics include the behavior of electrons, phonons and photons; the energy and entropic foundations; bandstructures and their calculation; the behavior at surfaces and interfaces, including those of heterostructures and their heterojunctions; deep and shallow point perturbations; scattering and transport, including mesoscale behavior, using the evolution and dynamics of classical and quantum ensembles from a probabilistic viewpoint; energy transformations; light-matter interactions; the role of causality; the connections between the quantum and the macroscale that lead to linear responses and Onsager relationships; fluctuations and their connections to dissipation, noise and other attributes; stress and strain effects in semiconductors; properties of high permittivity dielectrics; and remote interaction processes. The final chapter discusses the special consequences of the principles to the variety of properties (consequences of selection rules, for example) under quantum-confined conditions and in monolayer semiconductor systems. The text also bring together short appendices discussing transform theorems integral to this study, the nature of random processes, oscillator strength, A and B coefficients and other topics important for understanding semiconductor behavior. The text brings the study of semiconductor physics to the same level as that of the advanced texts of solid state by focusing exclusively on the equilibrium and off-equilibrium behaviors important in semiconductors.
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Book chapters on the topic "Fluctuation strength"

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Zwicker, Eberhard, and Hugo Fastl. "Fluctuation Strength." In Psychoacoustics. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-09562-1_10.

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Fastl, Hugo, and Eberhard Zwicker. "Fluctuation Strength." In Psychoacoustics. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-68888-4_10.

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Alhassid, Y. "Transition strength fluctuations and the onset of chaos." In The Physics of Phase Space Nonlinear Dynamics and Chaos Geometric Quantization, and Wigner Function. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/3-540-17894-5_332.

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Salomoni, S. E., and T. Graven-Nielsen. "Muscle Strength as a Predictor of the Magnitude of Multidirectional Force Fluctuations during Steady Contractions." In IFMBE Proceedings. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21683-1_23.

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Bulanov, V. A. "Heterogeneous Nucleation, Influence of Heterophase Fluctuations on the Cavitation Strength, and the Supercooling of Liquids with Phase Inclusions." In Liquids Under Negative Pressure. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0498-5_28.

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Kanno, M., M. Nagao, and Y. Sato. "Study on the Fatigue Strength of Pressure Vessel Subjected to Internal Fluctuating Pressure In the Case of 3% Saltwater as Pressure Medium." In Ocean Space Utilization ’85. Springer Japan, 1985. http://dx.doi.org/10.1007/978-4-431-68284-4_73.

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Fastl, H. "Fluctuation Strength of Narrow Band Noise." In Auditory Physiology and Perception. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-08-041847-6.50043-5.

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Guo, Cheng, R. Venkatesha Prasad, Jing Wang, Vijay Sathyanarayana Rao, and Ignas Niemegeers. "Localizing Persons Using Body Area Sensor Network." In Developments in Wireless Network Prototyping, Design, and Deployment. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-1797-1.ch013.

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Context awareness is an important aspect in many ICT applications. For example, in an intelligent home network, location of the user enables session transfer, lighting, and temperature control, et cetera. In fact, in a body area sensor network (BASN), location estimation of a user helps in realizing realtime monitoring of the person (especially those who require help) for better health supervision. In this chapter the authors first introduce many localization methods and algorithms from the literature in BASNs. They also present classification of these methods. Amongst them, location estimation using signal strength is one of the foremost. In indoor environments, the authors found that the signal strength based localization methods are usually not accurate, since signal strength fluctuates. The fluctuation in signal strength is due to deficient antenna coverage and multi-path interference. Thus, localization algorithms usually fail to achieve good accuracy. The authors propose to solve this problem by combining multiple receivers in a body area sensor network to estimate the location with a higher accuracy. This method mitigates the errors caused by antenna orientations and beam forming properties. The chapter evaluates the performance of the solution with experiments. It is tested with both range-based and range-free localization algorithm that we developed. The chapter shows that with spatial diversity, the localization accuracy is improved compared to using single receiver alone. Moreover, the authors observe that range-based algorithm has a better performance.
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Chu, C. Y. Cyrus. "Cyclical Patterns of Human Population: Summary of Previous Research." In Population Dynamics. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195121582.003.0012.

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According to Chesnais (1992), the fluctuation of human populations can be summarized into three broad categories: the pretransitional, transitional, and posttransitional cycles. In the pretransitional period before the Industrial Revolution, population fluctuations appear to reflect natural constraints of the environment. In more recent centuries, there were changes of the vital rates from high fertility-high mortality to low fertility-low mortality, which are referred to as demographic transitions. In this transitional period, because the decline of mortality usually leads that of fertility, fluctuations in the population age structure are a natural consequence of such a transition. After this transitional period, in many developed countries the mortality rate is stabilized, and female fertility becomes a typical family decision. Since family fertility decisions are related to other market institutions, the posttransitional population cycles have close interactions with these institutional elements. Although the population cycles can be separated into the three above-mentioned types, these cyclical movements share one common feature: the Malthusian environmental check always plays a direct or indirect role. In the next few chapters, I will discuss how the environmental checks interact with human decisions and institutions and how these interactions affect the cyclical movement of the population. Thomas Malthus argued that all populations are subject to environmental constraints and that these constraints operate through a variety of checks to population growth. If there are no such checks, we have a stationary branching process as described in chapters 2-6. In that case, the population will converge to a steady state under weak assumptions, and there are fluctuations only in the process of convergence. When there are environmental checks, the strength of the checks determines the speed with which the system tends toward equilibrium; this speed, relative to response lags that are intrinsic to the process, heavily influences the dynamic behavior of the economic-demographic system. When checks are weak, shocked populations tend to converge slowly without overshooting and to move in cycles one generation long (Lee, 1974). If checks arc stronger, overshooting may occur, and longer cycles of periodicity spanning two generations or more are possible, as population size and growth rates oscillate about their equilibrium values.
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Scafetta, N., and P. Grigolin. "Nonextensive Diffusion Entropy Analysis and Teen Birth Phenomena." In Nonextensive Entropy. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195159769.003.0021.

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A complex process is often a balance between nonscaling and scaling components. We show how the nonextensive Tsallis g-entropy indicator may be interpreted as a measure of the nonscaling condition in time series. This is done by applying the nonextensive entropy formalism to the diffusion entropy analysis (DEA). We apply the analysis to the study of the teen birth phenomenon. We find that the number of unmarried teen births is strongly influenced by social processes that induce an anomalous memory in the data. This memory is related to the strength of the nonscaling component of the signal and is more intense than that in the married teen birth time series. By using a wavelet multiresolution analysis, we attempt to provide a social interpretation of this effect…. One of the most exciting and rapidly developing areas of modern research is the quantitative study of "complexity." Complexity has special interdisciplinary impacts in the fields of physics, mathematics, information science, biology, sociology, and medicine. No definition of a complex system has been universally embraced, so here we adopt the working definition, "an arrangement of parts so intricate as to be hard to understand or deal with." Therefore, the main goal of the science of complexity is to develop mathematical methods in order to discriminate among the fundamental microscopic and macroscopic constituents of a complex system and to describe their interrelations in a concise way. Experiments usually yield results in the form of time series for physical observables. Typically, these time series contain both a slow regular variation, usually called a "signal," and a rapid erratic fluctuation, usually called "noise." Historically, the techniques applied to processing such time series have been based on equilibrium statistical mechanics and, therefore, they are not applicable to phenomena far from equilibrium. Among the fluctuating phenomena, a particularly important place is occupied by those phenomena characterized by some type of self-similar or scaling-fractal structures [4]. In this chapter we show that the nonextensive Tsallis g-entropy indicator may be interpreted as a measure of the strength of the nonscaling component of a time series.
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Conference papers on the topic "Fluctuation strength"

1

Osses Vecchi, Alejandro, Rodrigo García León, and Armin Kohlrausch. "Modelling the sensation of fluctuation strength." In 22nd International Congress on Acoustics: Acoustics for the 21st Century. Acoustical Society of America, 2016. http://dx.doi.org/10.1121/2.0000410.

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Zhang, Jiangbo, and Yiguang Hong. "Fluctuation strength analysis of a long-range opinion model." In 2015 34th Chinese Control Conference (CCC). IEEE, 2015. http://dx.doi.org/10.1109/chicc.2015.7261079.

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Blommer, Mike, and Norm Otto. "A New Method for Calculating Fluctuation Strength in Electric Motors." In SAE 2001 Noise & Vibration Conference & Exposition. SAE International, 2001. http://dx.doi.org/10.4271/2001-01-1588.

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Gajdos, Petr, Pavel Dohnalek, Roman Sebesta, et al. "A signal strength fluctuation prediction model based on symbolic regression." In 2015 38th International Conference on Telecommunications and Signal Processing (TSP). IEEE, 2015. http://dx.doi.org/10.1109/tsp.2015.7296398.

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Miura, Masanobu, and Nozomiko Yasui. "Fluctuation strength on real sound: motorbike exhaust and marimba tremolo." In ICA 2013 Montreal. ASA, 2013. http://dx.doi.org/10.1121/1.4799863.

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Venkat, V. Rajendra Sai, M. V. S. Siresh Narayanaswamy, and Mary Posonia. "Extend your journey: Considering signal strength and fluctuation in location-based applications." In 2017 International Conference on Computation of Power, Energy Information and Commuincation (ICCPEIC). IEEE, 2017. http://dx.doi.org/10.1109/iccpeic.2017.8290403.

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7

Nakanishi, Takahiro, Ken Suzuki, and Hideo Miura. "Variation of the Strength of Grains and Grain Boundaries Caused by the Fluctuation of Their Crystallinity." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67557.

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The variation of the strength of a grain and a grain boundary was measured by a micro tensile test system fabricated in an electron microscope. A micro-scale beam structure was fabricated from a single-crystalline silicon wafer and a fine nano-scale sample cut from a thin film using a focused ion beam was attached to the center of the beam by deposition of tungsten in the microscope. The other end was attached to a micro probe similarly. Finally, the micro probe was activated to pull the sample and the deformation of the sample was observed by a scanning electron microscope. The fracture strength of a bicrystal sample was measured by detecting the deflection of the beam at the breakage of the sample. The crystallinity of both a grain and a grain boundary was quantitatively evaluated by using electron back-scatter diffraction analysis from the viewpoint of the change of the order of atom arrangement in them. It was found that the strength of a grain and a grain boundary varied clearly depending on their crystallinity. In addition, there was a critical value of the crystallinity at which the fracture mode of a polycrystalline material changed from intergranular fracture to transgranular fracture.
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8

Hayashi, Makoto, and Takashi Ito. "Fretting Fatigue Strength of Nozzle Shaped Structure." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2989.

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In-Core Monitor (ICM) housing of BWR reactor pressure vessel is subjected to the flow induced vibration (FIV). The flow fluctuation takes places in the lower plenum of reactor pressure vessel. It is very much important to evaluate the structural integrity of ICM housing in order to maintain high operating rate. Thus we performed the FIV simulated fatigue test of ICM housing. However, the stress at the weld toe induced by FIV is sufficiently low not to fail. The fatigue endurance limit for the weld root fatigue test specimen with dull taper is 196 MPa. On the while, the fatigue endurance limit for the weld root fatigue test specimen with steep taper is not obtained. When the fatigue test results are approximated by the Stromeyer equation, the fatigue strength for the fatigue life of 109 cycles is estimated as 27 MPa. Finally we performed the fracture mechanics analysis, which indicates that the stress intensity factors for Mode I and II range from 0.1 to 0.2 MPam so that the fatigue crack is not initiated at the weld root by FIV.
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9

Teramae, Jun-nosuke. "Long-tailed distribution of synaptic strength reveals origin and functional roles of ongoing fluctuation in cortical circuit." In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015). Author(s), 2016. http://dx.doi.org/10.1063/1.4951999.

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10

Qin, Shujing. "Strength Design Requirements in Chinese Pressure Piping Code." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61116.

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In order to improve the design, fabrication and inspection of pressure piping and to enhance the safety level of pressure piping in operation, a new pressure piping code has been issued in 2007 by Standardization Administration of The People’s Republic of China. In this paper, the structure of this new code and, especially, the requirements of strength design stipulated in the code were introduced. In this code, except for the structure, many provisions have the same meanings with that in ASME piping code B31.3. But, there are some other provisions, in view of the fact that the pressure piping code needs to be conformed with corresponding Chinese codes and standards, are different from that in B31.3, such as the classified categories of piping, the treatment of pressure fluctuation, the application of stress intensification factor, and so on. The contents on pressure design of fittings and piping stress analysis in the code were emphatically described herein. However, at the same times, other requirements on material and inspection to fulfill the safety of pressure piping were also briefly introduced.
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