Instability

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Routes to Absolute Instability in Porous Media

Author : Antonio Barletta
Publisher : Springer
Page : 283 pages
File Size : 51,9 Mb
Release : 2019-01-02
Category : Technology & Engineering
ISBN : 9783030061944

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Routes to Absolute Instability in Porous Media by Antonio Barletta Pdf

This book addresses the concepts of unstable flow solutions, convective instability and absolute instability, with reference to simple (or toy) mathematical models, which are mathematically simple despite their purely abstract character. Within this paradigm, the book introduces the basic mathematical tools, Fourier transform, normal modes, wavepackets and their dynamics, before reviewing the fundamental ideas behind the mathematical modelling of fluid flow and heat transfer in porous media. The author goes on to discuss the fundamentals of the Rayleigh-Bénard instability and other thermal instabilities of convective flows in porous media, and then analyses various examples of transition from convective to absolute instability in detail, with an emphasis on the formulation, deduction of the dispersion relation and study of the numerical data regarding the threshold of absolute instability. The clear descriptions of the analytical and numerical methods needed to obtain these parametric threshold data enable readers to apply them in different or more general cases. This book is of interest to postgraduates and researchers in mechanical and thermal engineering, civil engineering, geophysics, applied mathematics, fluid mechanics, and energy technology.

Instability in Geophysical Flows

Author : William D. Smyth,Jeffrey R. Carpenter
Publisher : Cambridge University Press
Page : 342 pages
File Size : 55,8 Mb
Release : 2019-04-25
Category : Science
ISBN : 9781108670517

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Instability in Geophysical Flows by William D. Smyth,Jeffrey R. Carpenter Pdf

Instabilities are present in all natural fluids from rivers to atmospheres. This book considers the physical processes that generate instability. Part I describes the normal mode instabilities most important in geophysical applications, including convection, shear instability and baroclinic instability. Classical analytical approaches are covered, while also emphasising numerical methods, mechanisms such as internal wave resonance, and simple `rules of thumb' that permit assessment of instability quickly and intuitively. Part II introduces the cutting edge: nonmodal instabilities, the relationship between instability and turbulence, self-organised criticality, and advanced numerical techniques. Featuring numerous exercises and projects, the book is ideal for advanced students and researchers wishing to understand flow instability and apply it to their own research. It can be used to teach courses in oceanography, atmospheric science, coastal engineering, applied mathematics and environmental science. Exercise solutions and MATLAB® examples are provided online. Also available as Open Access on Cambridge Core.

Interfacial Instability

Author : Lewis E. Johns,Ranga Narayanan
Publisher : Springer Science & Business Media
Page : 346 pages
File Size : 48,7 Mb
Release : 2007-05-08
Category : Technology & Engineering
ISBN : 9780387227016

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Interfacial Instability by Lewis E. Johns,Ranga Narayanan Pdf

Essays are written to fulfill the needs of both teachers and graduate students; Problems have been selected so that they can be solved by hand; Discussion notes are at the end of many of the essays to serve as a basis for discussion; Endnotes provide background information which the reader may need in order to enjo the essay

Spinal Instability

Author : Luigi Manfrè
Publisher : Springer
Page : 123 pages
File Size : 43,5 Mb
Release : 2015-01-14
Category : Medical
ISBN : 9783319129013

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Spinal Instability by Luigi Manfrè Pdf

This easy-to-consult guide describes new minimally invasive procedures for the treatment of spinal instability that are accompanied by fewer complications and side-effects, reduce the risks of anesthesia, and lower costs. Clear accounts of a range of CT, X-ray, and MRI guided techniques are provided, including radiofrequency ablation in facet syndrome, cervical spine fusion, posterior and anterior lumbar spine fusion, and lumbosacral fusion. A brief but comprehensive introduction is included on biomechanics, relevant clinical syndromes, and diagnostic imaging. Like other books in the Springer series New Procedures in Spinal Interventional Neuroradiology, this practice-oriented volume will fill a significant gap in the literature and meet the need expressed by a large number of specialists (interventional neuroradiologists and radiologists, neurosurgeons, and orthopedists) for a topical and handy guide that specifically illustrates the presently available materials and methods.

Hydrodynamic Instabilities

Author : François Charru
Publisher : Cambridge University Press
Page : 411 pages
File Size : 51,7 Mb
Release : 2011-06-30
Category : Science
ISBN : 9781139500548

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Hydrodynamic Instabilities by François Charru Pdf

The instability of fluid flows is a key topic in classical fluid mechanics because it has huge repercussions for applied disciplines such as chemical engineering, hydraulics, aeronautics, and geophysics. This modern introduction is written for any student, researcher, or practitioner working in the area, for whom an understanding of hydrodynamic instabilities is essential. Based on a decade's experience of teaching postgraduate students in fluid dynamics, this book brings the subject to life by emphasizing the physical mechanisms involved. The theory of dynamical systems provides the basic structure of the exposition, together with asymptotic methods. Wherever possible, Charru discusses the phenomena in terms of characteristic scales and dimensional analysis. The book includes numerous experimental studies, with references to videos and multimedia material, as well as over 150 exercises which introduce the reader to new problems.

Lateral Ankle Instability

Author : Hélder Pereira,Stéphane Guillo,Mark Glazebrook,Masato Takao,James Calder,Niek Van Dijk,Jón Karlsson
Publisher : Springer Nature
Page : 392 pages
File Size : 41,5 Mb
Release : 2021-04-28
Category : Medical
ISBN : 9783662627631

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Lateral Ankle Instability by Hélder Pereira,Stéphane Guillo,Mark Glazebrook,Masato Takao,James Calder,Niek Van Dijk,Jón Karlsson Pdf

This superbly illustrated, up-to-date reference textbook covers all aspects of ankle instability and its management. Readers will find extensive information on biomechanics, injury prevention, current strategies for conservative treatment, and established and emerging surgical techniques. The most recent procedures, particularly those which are minimally invasive and arthroscopically assisted, are described and discussed in depth. Detailed attention is also devoted to controversies such as the indications and timing for conservative or surgical treatment, the current and future roles of arthroscopy, the definition of “anatomic” repair, and the upcoming concept of “anatomic reconstruction” (replication of anatomy by using a graft). The book is published in cooperation with ESSKA, and the chapter authors include clinicians and scientists working in the field of foot and ankle orthopaedics and sports medicine from across the world. All who are involved in the care of patients suffering from ankle instability, including amateur and high-level athletes, will find Lateral Ankle Instability to be an excellent source of knowledge and a valuable aid to clinical practice.

Global Instability

Author : S. McBride,L. Dobuzinskis,Marjorie Griffin Cohen,J. Busumtwi-Sam
Publisher : Springer Science & Business Media
Page : 254 pages
File Size : 55,6 Mb
Release : 2012-12-06
Category : Political Science
ISBN : 9789401002516

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Global Instability by S. McBride,L. Dobuzinskis,Marjorie Griffin Cohen,J. Busumtwi-Sam Pdf

Global Instability: Uncertainty and New Visions in Political Economy presents a series of papers that address the political consequences of globalization for states and their populations, while exploring the issue of alternatives to the model of globalization we are presently experiencing. The focus moves from the world of international agreements to the national and sub-national dilemmas that are posed by attempting to manage a set of global developments within a given territory. The initial chapter, by Daniel Drache, explores a still-born post-war international organization, the International Trade Organization, that offers a different vision of how a globally integrated economy might operate. A number of papers then explore the challenges posed by today's globalization, including currency instability in an environment of financial deregulation, the rights conferred on investors by the North American Free Trade Agreement, and the progressive liberalization of trade in services built into the General Agreement on Trade in Services.

Legislating Instability

Author : Tyler Beck Goodspeed
Publisher : Harvard University Press
Page : 207 pages
File Size : 44,5 Mb
Release : 2016-04-04
Category : Business & Economics
ISBN : 9780674969018

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Legislating Instability by Tyler Beck Goodspeed Pdf

From 1716 to 1845 Scottish banks were among the most dynamic and resilient in Europe, effectively absorbing economic shocks that rocked markets in London and on the continent. Tyler Beck Goodspeed explains the paradox that Scotland’s banking system achieved this success without the regulations Adam Smith considered necessary for economic stability.

Zones of Instability

Author : Imre Szeman
Publisher : JHU Press
Page : 260 pages
File Size : 48,9 Mb
Release : 2004-12-01
Category : Literary Criticism
ISBN : 9780801881534

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Zones of Instability by Imre Szeman Pdf

Attempts by writers and intellectuals in former colonies to create unique national cultures are often thwarted by a context of global modernity, which discourages particularity and uniqueness. In describing unstable social and political cultures, such "third-world intellectuals" often find themselves torn between the competing literary requirements of the "local" culture of the colony and the cosmopolitan, "world" culture introduced by Western civilization. In Zones of Instability, Imre Szeman examines the complex relationship between literature and politics by exploring the production of nationalist literature in the former British empire. Taking as his case studies the regions of the British Caribbean, Nigeria, and Canada, Szeman analyzes the work of authors for whom the idea of the"nation" and literature are inexorably entwined, such as Chinua Achebe, Wole Soyinka, C.L.R. James, Frantz Fanon, and V.S. Naipaul. Szeman focuses on literature created in the two decades after World War II, decades in which the future prospects for many colonies went from extreme political optimism to extreme political disappointment. He finds that the "nation" can be read as that space in which literature is thought to be able to conjoin two things that history has separated—the writer and the people.

Thermoacoustic Instability

Author : R. I. Sujith,Samadhan A. Pawar
Publisher : Springer Nature
Page : 484 pages
File Size : 46,8 Mb
Release : 2021-12-14
Category : Science
ISBN : 9783030811358

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Thermoacoustic Instability by R. I. Sujith,Samadhan A. Pawar Pdf

This book systematically presents the consolidated findings of the phenomenon of self-organization observed during the onset of thermoacoustic instability using approaches from dynamical systems and complex systems theory. Over the last decade, several complex dynamical states beyond limit cycle oscillations such as quasiperiodicity, frequency-locking, period-n, chaos, strange non-chaos, and intermittency have been discovered in thermoacoustic systems operated in laminar and turbulent flow regimes. During the onset of thermoacoustic instability in turbulent systems, an ordered acoustic field and large coherent vortices emerge from the background of turbulent combustion. This emergence of order from disorder in both temporal and spatiotemporal dynamics is explored in the contexts of synchronization, pattern formation, collective interaction, multifractality, and complex networks. For the past six decades, the spontaneous emergence of large amplitude, self-sustained, tonal oscillations in confined combustion systems, characterized as thermoacoustic instability, has remained one of the most challenging areas of research. The presence of such instabilities continues to hinder the development and deployment of high-performance combustion systems used in power generation and propulsion applications. Even with the advent of sophisticated measurement techniques to aid experimental investigations and vast improvements in computational power necessary to capture flow physics in high fidelity simulations, conventional reductionist approaches have not succeeded in explaining the plethora of dynamical behaviors and the associated complexities that arise in practical combustion systems. As a result, models and theories based on such approaches are limited in their application to mitigate or evade thermoacoustic instabilities, which continue to be among the biggest concerns for engine manufacturers today. This book helps to overcome these limitations by providing appropriate methodologies to deal with nonlinear thermoacoustic oscillations, and by developing control strategies that can mitigate and forewarn thermoacoustic instabilities. The book is also beneficial to scientists and engineers studying the occurrence of several other instabilities, such as flow-induced vibrations, compressor surge, aeroacoustics and aeroelastic instabilities in diverse fluid-mechanical environments, to graduate students who intend to apply dynamical systems and complex systems approach to their areas of research, and to physicists who look for experimental applications of their theoretical findings on nonlinear and complex systems.

Patellofemoral Pain, Instability, and Arthritis

Author : David Dejour,Stefano Zaffagnini,Elizabeth A. Arendt,Petri Sillanpää,Florian Dirisamer
Publisher : Springer Nature
Page : 569 pages
File Size : 52,6 Mb
Release : 2020-05-23
Category : Medical
ISBN : 9783662610978

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Patellofemoral Pain, Instability, and Arthritis by David Dejour,Stefano Zaffagnini,Elizabeth A. Arendt,Petri Sillanpää,Florian Dirisamer Pdf

This excellently illustrated book adopts an evidence-based approach to evaluate the efficacy of different techniques for the imaging and treatment of patellofemoral pain, instability, and arthritis. The aim is to equip practitioners with an informative guide that will help them to manage disorders of the patellofemoral joint by casting light on the many issues on which a consensus has been lacking. The opening chapters supply essential background information and explain the role of various imaging modalities, including radiography, CT, MRI, and bone scan. The various conservative and surgical treatment approaches for each of the three presentations – pain, instability, and arthritis – are then described and assessed in depth, with precise guidance on indications and technique. Postoperative management and options in the event of failed surgery are also evaluated. Throughout, careful attention is paid to the literature in an attempt to establish the level of evidence for each imaging and treatment method. The new edition has been thoroughly updated, with inclusion of additional chapters, in order to present the latest knowledge on biomechanics, diagnosis, surgical techniques, and rehabilitation.

Chemical Deterioration and Physical Instability of Food and Beverages

Author : Leif H Skibsted,Jens Risbo,Mogens L Andersen
Publisher : Elsevier
Page : 820 pages
File Size : 45,9 Mb
Release : 2010-04-23
Category : Technology & Engineering
ISBN : 9781845699260

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Chemical Deterioration and Physical Instability of Food and Beverages by Leif H Skibsted,Jens Risbo,Mogens L Andersen Pdf

For a food product to be a success in the marketplace it must be stable throughout its shelf-life. Quality deterioration due to chemical changes and alterations in condition due to physical instability are not always recognised, yet can be just as problematic as microbial spoilage. This book provides an authoritative review of key topics in this area. Chapters in part one focus on the chemical reactions which can negatively affect food quality, such as oxidative rancidity, and their measurement. Part two reviews quality deterioration associated with physical changes, such as moisture loss, gain and migration, crystallization and emulsion breakdown. Contributions in the following section outline the likely effects on different foods and beverages, including bakery products, fruit and vegetables, ready-to-eat meals and wine. With contributions from leaders in their fields, Chemical deterioration and physical instability of food and beverages is an essential reference for R&D and QA staff in the food industry and researchers with an interested in this subject. Examines chemical reactions which can negatively affect food quality and measurement Reviews quality deterioration associated with physical changes such as moisture loss, gain and migration, and crystallization Documents deterioration in specific food and beverage products including bakery products, frozen foods and wine

Developmental Instability

Author : Michal Polak
Publisher : Oxford University Press, USA
Page : 488 pages
File Size : 50,5 Mb
Release : 2003
Category : Language Arts & Disciplines
ISBN : 0195143450

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Developmental Instability by Michal Polak Pdf

The field of developmental instability has generated a large amount of controversy recently, mostly because of fierce disagreement over the genetic basis of fluctuating asymmetry and its role in mate selection. This book is a timely and innovative critical evaluation of a burgeoning field. The book explores the premise that complex organismal, ecological and evolutionary processes can be understood as emergent properties of the "epigenetic machine," that is, the mechanisms fundamental to all organisms responsible for building and organizing phenotypes from information translated from DNA.

From Instability to Intelligence

Author : Michail Zak,Joseph P. Zbilut,Ronald E. Meyers
Publisher : Springer Science & Business Media
Page : 559 pages
File Size : 44,9 Mb
Release : 2008-12-11
Category : Science
ISBN : 9783540691211

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From Instability to Intelligence by Michail Zak,Joseph P. Zbilut,Ronald E. Meyers Pdf

So far as the laws of mathematics refer to reality, they are not certain. And so far as they are certain, they do not refer to reality. -A. Einstein The word "instability" in day-to-day language is associated with some thing going wrong or being abnormal: exponential growth of cancer cells, irrational behavior of a patient, collapse of a structure, etc. This book, however, is about "good" instabilities, which lead to change, evolution, progress, creativity, and intelligence; they explain the paradox of irreversi bility in thermodynamics, the phenomena of chaos and turbulence in clas sical mechanics, and non-deterministic (multi-choice) behavior in biological and social systems. The concept of instability is an attribute of dynamical models that de scribe change in time of physical parameters, biological or social events, etc. Each dynamical model has a certain sensitivity to small changes or "errors" in initial values of its variables. These errors may grow in time, and if such growth is of an exponential rate, the behavior of the variable is defined as unstable. However, the overall effect of an unstable variable upon the dynamical system is not necessarily destructive. Indeed, there al ways exists such a group of variables that do not contribute to the energy of the system. In mechanics such variables are called ignorable or cyclic.

Stability, Instability and Chaos

Author : Paul Glendinning
Publisher : Cambridge University Press
Page : 408 pages
File Size : 48,7 Mb
Release : 1994-11-25
Category : Mathematics
ISBN : 0521425662

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Stability, Instability and Chaos by Paul Glendinning Pdf

An introduction to nonlinear differential equations which equips undergraduate students with the know-how to appreciate stability theory and bifurcation.