A petrophysical model describing spectral induced polarization (IP) has been developed for clay rocks accounting the Maxwell-Wagner polarization. It is also used to connect complex conductivity relative permeability of material. This applied Callovo-Oxfordian rock Paris Basin (France) where Meuse/Haute-Marne Underground Research Laboratory located. experiments are performed using eight clay-roc...

We apply the Hurst exponent idea for investigation of DJIA index time-series data. The behavior of the local Hurst exponent prior to drastic changes in financial series signal is analyzed. The optimal length of the time-window over which this exponent can be calculated in order to make some meaningful predictions is discussed. Our prediction hypothesis is verified with examples of '29 and '87 c...

We present a theoretical and experimental investigation of drainage in porous media. The study is limited to stabilized fluid fronts at moderate injection rates, but it takes into account capillary, viscous, gravitational forces. In the framework presented, work applied on system, energy dissipation, final saturation width front can all be calculated if we know dimensionless fluctuation number,...

‎by considering a degenerate $p(x)-$laplacian equation‎, ‎a generalized compact embedding in weighted variable‎ ‎exponent sobolev space is presented‎. ‎multiplicity of positive solutions are discussed by applying fibering map approach for the‎ ‎corresponding nehari manifold‎.

Gravitational fingering often occurs for water flow in unsaturated porous media. This paper reviews a recent effort developing macroscopic theory to describe the gravitational of homogeneous and soils, based on optimality principle that flows soils such manner generated patterns correspond minimum global resistance. The key difference between new conventional theories is hydraulic conductivity ...

A closed-form solution for deflections and stresses in an annular thin plate of radially functionally graded material under transverse uniform pressure loading is presented. The small displacement theory of elasticity is assumed in the present work. Young’s modulus of the material is taken in the form of a simple power law to vary in the radial direction with an arbitrary exponent showing heter...

The neutron density is one of the most important dynamical parameters in a reactor. It is directly related to the control and stability of the reactor power. Any change in applied reactivity and some of dynamical parameters in the reactor causes a change in the neutron density. Lyapunov exponent method is a powerful tool for investigating the range of stability and the transient behavior of the...

We carry out a finite-size scaling analysis of the jamming transition in frictionless bidisperse soft core disks in two dimensions. We consider two different jamming protocols: (i) quench from random initial positions and (ii) quasistatic shearing. By considering the fraction of jammed states as a function of packing fraction for systems with different numbers of particles, we determine the spa...