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Book
Flow control : theoretical concept of absolute instability
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ISBN: 1000016554 3866445318 Year: 2010 Publisher: KIT Scientific Publishing

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Abstract

At the 37th Prandtl memorial lecture on Regions of Viccous Flow, H.Oertel 1994 developed for the first time the stability theory of local perturbations in boundary layers and wake flows, as well as their practical application in the flow control of vehicle flows and the boundary layer of civil aircraft wings.This work presents how the stability theory concept of absolute instability has advanced and proven in practice in the last 15 years in terms of the efficient flow control.


Book
Équations différentielles ordinaires
Authors: ---
Year: 1969 Publisher: Moscou: Mir,

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Book
On the Stability of Objective Structures
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Year: 2021 Publisher: Berlin Logos Verlag Berlin

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The main focus of this thesis is the discussion of stability of an objective (atomic) structure consisting of single atoms which interact via a potential. We define atomistic stability using a second derivative test. More precisely, atomistic stability is equivalent to a vanishing first derivative of the configurational energy (at the corresponding point) and the coerciveness of the second derivative of the configurational energy with respect to an appropriate semi-norm. Atomistic stability of a lattice is well understood, see, e.,g., [40]. The aim of this thesis is to generalize the theory to objective structures. In particular, we first investigate discrete subgroups of the Euclidean group, then define an appropriate seminorm and the atomistic stability for a given objective structure, and finally provide an efficient algorithm to check its atomistic stability. The algorithm particularly checks the validity of the Cauchy-Born rule for objective structures. To illustrate our results, we prove numerically the stability of a carbon nanotube by applying the algorithm.


Book
On the Stability of Objective Structures
Author:
Year: 2021 Publisher: Berlin Logos Verlag Berlin

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Abstract

The main focus of this thesis is the discussion of stability of an objective (atomic) structure consisting of single atoms which interact via a potential. We define atomistic stability using a second derivative test. More precisely, atomistic stability is equivalent to a vanishing first derivative of the configurational energy (at the corresponding point) and the coerciveness of the second derivative of the configurational energy with respect to an appropriate semi-norm. Atomistic stability of a lattice is well understood, see, e.,g., [40]. The aim of this thesis is to generalize the theory to objective structures. In particular, we first investigate discrete subgroups of the Euclidean group, then define an appropriate seminorm and the atomistic stability for a given objective structure, and finally provide an efficient algorithm to check its atomistic stability. The algorithm particularly checks the validity of the Cauchy-Born rule for objective structures. To illustrate our results, we prove numerically the stability of a carbon nanotube by applying the algorithm.


Book
On the Stability of Objective Structures
Author:
Year: 2021 Publisher: Berlin Logos Verlag Berlin

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Abstract

The main focus of this thesis is the discussion of stability of an objective (atomic) structure consisting of single atoms which interact via a potential. We define atomistic stability using a second derivative test. More precisely, atomistic stability is equivalent to a vanishing first derivative of the configurational energy (at the corresponding point) and the coerciveness of the second derivative of the configurational energy with respect to an appropriate semi-norm. Atomistic stability of a lattice is well understood, see, e.,g., [40]. The aim of this thesis is to generalize the theory to objective structures. In particular, we first investigate discrete subgroups of the Euclidean group, then define an appropriate seminorm and the atomistic stability for a given objective structure, and finally provide an efficient algorithm to check its atomistic stability. The algorithm particularly checks the validity of the Cauchy-Born rule for objective structures. To illustrate our results, we prove numerically the stability of a carbon nanotube by applying the algorithm.


Book
Stability Analysis of Impulsive Functional Differential Equations
Author:
ISBN: 1282717189 9786612717185 3110221829 9783110221824 9781282717183 9783110221817 3110221810 Year: 2009 Publisher: Berlin Boston

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This book is devoted to impulsive functional differential equations which are a natural generalization of impulsive ordinary differential equations (without delay) and of functional differential equations (without impulses). At the present time the qualitative theory of such equations is under rapid development. After a presentation of the fundamental theory of existence, uniqueness and continuability of solutions, a systematic development of stability theory for that class of problems is given which makes the book unique. It addresses to a wide audience such as mathematicians, applied research


Book
Strategic Choice and International Relations
Authors: ---
ISBN: 0691213097 Year: 1999 Publisher: Princeton, N.J. : Baltimore, Md. : Princeton University Press, Project MUSE,

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The strategic-choice approach has a long pedigree in international relations. In an area often rent by competing methodologies, editors David A. Lake and Robert Powell take the best of accepted and contested knowledge among many theories. With the contributors to this volume, they offer a unifying perspective, which begins with a simple insight: students of international relations want to explain the choices actors make--whether these actors be states, parties, ethnic groups, companies, leaders, or individuals. This synthesis offers three new benefits: first, the strategic interaction of actors is the unit of analysis, rather than particular states or policies; second, these interactions are now usefully organized into analytic schemes, on which conceptual experiments may be based; and third, a set of methodological "bets" is then made about the most productive ways to analyze the interactions. Together, these elements allow the pragmatic application of theories that may apply to a myriad of particular cases, such as individuals protesting environmental degradation, governments seeking to control nuclear weapons, or the United Nations attempting to mobilize member states for international peacekeeping. Besides the editors, the six contributors to this book, all distinguished scholars of international relations, are Jeffry A. Frieden, James D. Morrow, Ronald Rogowski, Peter Gourevitch, Miles Kahler, and Arthur A. Stein. Their work is an invaluable introduction for scholars and students of international relations, economists, and government decision-makers.

Allies, Adversaries, and International Trade
Authors: ---
ISBN: 0691044716 0691033552 Year: 1995 Publisher: Princeton : Princeton University Press,

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During the Cold War, international trade closely paralleled the division of the world into two rival political-military blocs. NATO and GATT were two sides of one coin; the Warsaw Treaty Organization and the Council for Mutual Economic Assistance were two sides of another. In this book Joanne Gowa examines the logic behind this linkage between alliances and trade and asks whether it applies not only after but also before World War II.

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