Coherent modes which are present when there is no incoherent tune spread may be absent when such a spread exists. Such modes are “Landau damped.” There is instead an incoherent spectrum, a continuum of an infinite number of frequencies, which will decohere (filament), thus not leading to collective instabilities. A stability diagram indicates when Landau damping will be effective. It divides th...

The control design for unmanned underwater vehicles (UUVs) is challenging due to the uncertainties in the complex dynamic modeling of the vehicle as well as its unstructured operational environment. To cope with these difficulties, a practical robust control is therefore desirable. The paper deals with the application of coefficient diagram method (CDM) for a robust control design of an autonom...

The effect of magnetic shear and shear flow on local gravitationally induced instabilities is investigated. A simple model is constructed allowing for an arbitrary entropy gradient and a shear plasma flow in the Boussinesq approximation. A transformation to shearing magnetic coordinates achieves a model with plasma flow along the magnetic field lines where the coordinate lines are coincident wi...

Stability phase diagram and intermolecular interactions 8.4 Gel formation 8.5 Mixtures of proteins and polysaccharides 9. From molecules to cells. 10. Conclusion: the specificity of pressure effects Acknowledgments Glossary Bibliography Biographical Sketch

We construct a phase diagram for self-assembling biologically active peptide amphiphiles. The structure and stability of the assemblies are studied as a function of pH and salinity of the solution. The general features of the phase diagram are predicted based on theoretical modeling of the self-assembly process, as well as experimental data, and further experiments are performed to verify and a...

To address the problem of poor stability ultrasonic machining wave-absorbing honeycomb material, this study takes cutting material with a disc cutter as research object and establishes multi-degree-of-freedom mathematical model system based on relative positions tool, motion characteristics tool. On basis, modal analysis cell wall plate is carried out to draw Lobe diagram stability, process exp...

Abstract Energetic neutral atom (ENA) measurements by IBEX reveal that the heliotail comprises an energy-dependent multilobe structure. We examine evolution over 11 yr of observations covering a full solar cycle (SC). find following: (1) The structure persists entire SC, comprising three ENA-enhanced and two ENA-suppressed lobes. (2) Lobe sizes locations are generally stable but exhibit variati...