I ran’s economy is suffering from sharp and persistent economic shocks and agriculture plays an undeniable role in its economic growth and development. The aim of this paper is to study the relative contributions of various macroeconomic shocks to generating fluctuations in Iran’s agriculture sector. To do so, a Dynamic Stochastic General Equilibrium (DSGE) model, emphasizing on the ...

Electrostatic turbulence has been investigated in the plasma boundary region in the JET tokamak and in the TJ-II stellarator. In both devices the naturally occurring velocity shear layer organizes itself to reach a condition in which the radial gradient in the poloidal phase velocity of fluctuations is comparable to the inverse of the correlation time of fluctuations (1/τ). This result suggests...

When the accretion rate is more than a small fraction of Eddington, the inner regions of accretion disks around black holes are expected to be radiation-dominated. However, in the α-model, these regions are also expected to be thermally unstable. In this paper, we report two 3-d radiation MHD simulations of a vertically-stratified shearing box in which the ratio of radiation to gas pressure is ...

there are various ways for estimating velocity of money in economic literature and each has its own specific weaknesses and strengths. particularly, since a great deal of financial innovations and changes have recently taken place affecting the velocity of money, many traditional methods can no langer calculate the equilibrium velocity of money, and they are no longer dependable from the econom...

The first measurements of long wavelength (kyρs < 0.3) electron temperature fluctuations in Alcator C-Mod made with a new Correlation Electron Cyclotron Emission (CECE) diagnostic support a long-standing hypothesis regarding the confinement transition from Linear Ohmic Confinement (LOC) to Saturated Ohmic Confinement (SOC). Electron temperature fluctuations decrease significantly (∼40%) crossin...

The impact of stochasticity and spatial heterogeneity on the quadratic autocatalytic system is studied. In a nonspatial setting the reactive state of the system is found to be unstable in small volumes where internal fluctuations drive the system to the unreactive state. This phenomena is of potential importance to the stability of reactions in biological cells. A simple spatial model is constr...

The present work studies the effect of additive noise on two high-dimensional systems. The first system under study is two-dimensional, evolves close to the deterministic stability threshold and exhibits an additive noise-induced shift of the control parameter when driving one variable by uncorrelated Gaussian noise. After a detailed analytical and numerical study of this effect, the work furth...

Abstract Understanding the relationship between complexity and stability in large dynamical systems—such as ecosystems—remains a key open question theory which has inspired rich body of work developed over more than fifty years. The vast majority this addresses asymptotic linear around equilibrium points, but idea ‘stability’ fact other uses empirical ecological literature. important notion ‘te...

in this paper, we investigated the necessity and effects of optimal control methods in the stability and performance of a micro-grid that operates in islanded mode. the micro-gird is consisted of a combine heat and power (chp), a capacitor bank (cb), photovoltaic panel (pv) as power generation sources. in addition, battery and the building electricity and thermal load are placed on the load sid...

Molecular dynamics simulations were employed to study how protein solution structure and dynamics are affected by adaptation to high temperature. Simulations were carried out on a para-nitrobenzyl esterase (484 residues) and two thermostable variants that were generated by laboratory evolution. Although these variants display much higher melting temperatures than wild-type (up to 18 degrees C h...