Results 41 to 50 of about 226,393 (341)
An Energy-Balancing Perspective of Interconnection and Damping Assignment Control of Nonlinear Systems [PDF]
, 2003 Stabilization of nonlinear feedback passive systems is achieved assigning a storage function with a minimum at the desired equilibrium. For physical systems a natural candidate storage function is the difference between the stored and the supplied ...
Jeltsema, Dimitri, +2 more
core +3 more sources
Stabilization of an arbitrary profile for an ensemble of half-spin systems [PDF]
, 2012 We consider the feedback stabilization of a variable profile for an ensemble of non interacting half spins described by the Bloch equations. We propose an explicit feedback law that stabilizes asymptotically the system around a given arbitrary target ...
Beauchard, Karine +2 more
core +4 more sources
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
Feedback Stability for Dissipative Switched Systems
IFAC-PapersOnLine, 2017 A method is proposed to infer Lyapunov and asymptotic stability properties forswitching systems, under arbitrary continuous-state feedback. Continuous-time systems which are dissipative in the multiple-storage function sense are considered. A partition of the state space, induced by the cross-supply rates and the feedback function, is used to derive ...
Karalis, Paschalis, Navarro Lopez, Eva
openaire +2 more sources
Feedback control of ultra-high-Q microcavities: application to micro-Raman lasers and microparametric oscillators [PDF]
, 2005 We demonstrate locking of an on-chip, high-Q toroidal-cavity to a pump laser using two, distinct methods: coupled power stabilization and wavelength locking of pump laser to the microcavity.
Carmon, Tal +5 more
core +1 more source
FEBS Letters, EarlyView.Structural and biochemical characterisations show that the planar cell polarity (PCP) protein Inturned harbours a unique PDZ‐like domain that does not bind canonical PDZ‐binding motifs (PBMs) like that of another PCP protein Vangl2. In contrast, the apical‐basal polarity protein Scribble contains four PDZ domains that bind Vangl2, but one PDZ domain ...
Stephan Wilmes +4 more
wiley +1 more source
Output Feedback Adaptive Stabilization of Uncertain Nonholonomic Systems
Abstract and Applied Analysis, 2014 This paper investigates the problem of output feedback adaptive stabilization control design for a class of nonholonomic chained systems with uncertainties, involving virtual control coefficients, unknown nonlinear parameters, and unknown time delays ...
Yuanyuan Wu +3 more
doaj +1 more source
Stability improvement of nonlinear systems by feedback
IEEE Transactions on Automatic Control, 1984 Two main results concerning systems stabilization are given. The first one is that systems with controllable linearization at a critical point are precisely those that can be driven to that point arbitrarily fast by smooth feedback. In addition the authors generalize a knewly sufficient condition involving the existence of a global feedback stabilizer,
Kalouptsidis, N., Tsinias, A.J.
openaire +3 more sources
Control Lyapunov Functions and Stabilization by Means of Continuous Time-Varying Feedback [PDF]
, 2007 For a general time-varying system, we prove that existence of an "Output Robust Control Lyapunov Function" implies existence of continuous time-varying feedback stabilizer, which guarantees output asymptotic stability with respect to the resulting closed-
Karafyllis, Iasson, Tsinias, John
core +2 more sources
FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
wiley +1 more source