In this paper we study the ergodicity of the queueing network system with two stations and N classes ”N is a multiple of 4” with (N4 − 1) feedbacks at the first station and N4 feedbacks at the second one under the FIFO policy and the usual conditions ρ1 = m1 + N ∑

This paper provides a survey of the theory of patchy feedbacks, and its applications to asymptotic stabilization and optimal control. It also contains two new results, showing the robustness of sub-optimal patchy feedbacks both in the case of (internal and external) deterministic disturbances, and of random perturbations modelled by stochastic Brownian motion.

Increases in atmospheric CO2 and CH4 result from a combination of forcing from anthropogenic emissions and Earth System feedbacks that reduce or amplify the effects of those emissions on atmospheric concentrations. Despite decades of research carbon-climate feedbacks remain poorly quantified. The impact of these uncertainties on future climate are of increasing concern, especially in the wake o...

As a measure of sustainability, Fisher information is employed in the Gompertz growth model. The effect different oscillatory modulations examined on system's evolution and Probability Density Function (PDF). For sufficiently large frequency periodic fluctuations occurring both positive negative feedbacks, system maintains its initial conditions. A similar PDF shown regardless values when there...

This paper offers a critical review of the topic of cloud–climate feedbacks and exposes some of the underlying reasons for the inherent lack of understanding of these feedbacks and why progress might be expected on this important climate problem in the coming decade. Although many processes and related parameters come under the influence of clouds, it is argued that atmospheric processes fundam...

The Bio-hydro-atmosphere interactions of Energy, Aerosols, Carbon, H2O, Organics & Nitrogen (BEACHON) project seeks to understand the feedbacks and interrelationships between hydrology, biogenic emissions, carbon assimilation, aerosol properties, clouds and associated feedbacks within water-limited ecosystems. The Manitou Experimental Forest Observatory (MEFO) was established in 2008 by the Nat...

A coupled model for the Pacific region has been used to study the response of the zonal SST contrast and the strength of Walker circulation to changes in the meridional differential heating over the Pacific ocean. Different from the previous studies that use an intermediate ocean model, the present model employs a primitive equation model for the Pacific ocean—the NCAR Pacific basin model— and ...

The modern synthesis of evolutionary biology unified Darwin's natural selection with Mendelian genetics, but at the same time it created the dilemma of genetic load. Lewontin and Hubby's (1966) and Harris's (1966) characterization of genetic variation in natural populations increased the apparent burden of this load. Neutrality or near neutrality of genetic variation was one mechanism proposed ...