Trust is one of the most concerned obstacles for the adoption and growth of cloud computing. Although several solutions have been proposed recently in managing trust feedbacks in cloud environments, how to determine the credibility of trust feedbacks is mostly neglected. In addition, managing trust feedbacks in cloud environments is a difficult problem due to unpredictable number of cloud servi...

We consider the problem of finding optimal, robust stabilization of linear systems within a family of nonlinear feedback laws. Investigation of the efficiency of full-state and partial-state based so called NPID feedback schemes proposed for stabilization of systems in robotics applications has provided the motivation for our work. We prove that for a given quadratic Lyapunov function and a giv...

This article addresses the computation of invariant and stabilizing control laws for dual-substrate fed-batch fermentors. The design is based on two commonly used model structures. It will be shown how to derive partial state feedbacks, using only biomass and volume as measures, that keep the substrates at a desired concentration provided the model is good enough and does not change with time. ...

New sufficient linear-matrix-inequality conditions are provided to ensure the stability of a class of fractional-order systems by means of asymptotic observer-based feedbacks. It is shown that the search of the observer and the controller gains can be obtained by decoupling the necessary matrix inequalities that involve coupled gains. The obtained numerically tractable conditions are formulated...

5 Are equilibrium climate sensitivity and the associated radiative feedbacks a constant property 6 of the climate system, or do they change with forcing magnitude and base climate? Using 7 the radiative kernel technique, feedbacks and climate sensitivity are evaluated in a fully 8 coupled general circulation model (GCM) for three successive doublings of carbon dioxide 9 starting from present da...

We estimate climate sensitivity from observations, using the deseasonalized fluctuations in sea surface temperatures (SSTs) and the concurrent fluctuations in the top-of-atmosphere (TOA) outgoing radiation from the ERBE (1985-1999) and CERES (20002008) satellite instruments. Distinct periods of warming and cooling in the SSTs were used to evaluate feedbacks. An earlier study (Lindzen and Choi, ...

Uncertainty in the spatial pattern of climate change is dominated by divergent predictions among climate models. Model di erences are closely linked to their representation of climate feedbacks, that is, the additional radiative fluxes that are caused by changes in clouds, water vapour, surface albedo, and other factors, in response to an external climate forcing. Progress in constraining this ...

In this paper, a delayed n-species nonautonomous Lotka–Volterra type food-chain system without dominating instantaneous negative feedback is investigated. By means of a Lyapunov functional, sufficient conditions are derived for the global asymptotic stability of the positive solution of the system. As a corollary, it is shown that the global asymptotic stability of the positive solution is main...

Recent studies investigating feedbacks between evolution and ecology suggest that microevolution may affect community structure. Motivated by this, we use a quantitative genetics and LotkaVolterra framework to understand the impact of eco-evolutionary feedbacks on an intraguild predation community in which the intraguild predator evolves between a phenotype specialized for attacking its competi...