mrs method is one of the new geophysical methods that directly detects the groundwater. by using this method, one can determines some parameters of aquifer (porosity, permeability and transmissivity). the purpose of this research is the application of mrs method in the conductive ground. combination of mrs and rs method is used for better detection of the aquifer in the region of abyek located ...

An improved model of mud dispersion has been introduced in this work. The advantages of this model consist of a new analytical correlation for dispersivity by using resistivity log data and using a new aspect of capacitance dispersion model. Mathematical formulations were expressed, solved by numerical model taking advantage of actual log and formation data. Achieved results yielded r...

In their recent paper, Roberts et aL (1979) report the following values of intracellular (i), extracellular (o), longitudinal (<f), and transverse (t) resistivity for canine ventricular muscle: r^ = 450 ohms-cm, rot = 750 ohm-cm, ru = 360 ohm-cm, and rit = 3800 ohm-cm. The ratio W r ^ is 1.67. In an earlier paper, Clerc (1976) reported the following resistivity ratios for trabecular bundles fro...

In a recent article Raeder [1999] presented a series of MHD simulations using a resistive MHD model to describe the interaction of the terrestrial magnetosphere with the solar wind for due northward interplanetary magnetic field (IMF) conditions. Depending on the initial conditions, the simulated magnetotail remained open for at least 6 hours after the IMF turned from south to north, or remaine...

one of the main factors of premature deterioration of concrete structures is the corrosion of reinforcements. chloride penetration of concrete is one of the main reasons of this phenomenon. therefore, to have durable structure, it is necessary to have concretes with low permeability.there are various methods to evaluate permeability of concrete. finding a relationship between them can be useful...

The electron scattering at surfaces, interfaces, and grain boundaries is investigated using polycrystalline and single-crystal Cu thin films and nanowires. The experimental data is described by a Fuchs–Sondheimer (FS) and Mayadas–Shatzkes (MS) model that is extended to account for the large variation in the specific resistivity of different grain boundaries as well as distinct top and bottom su...

We studied resistivity, magnetoresistivity, and Hall resistivity for a few percolating granular NiFe-SiO2 films upon thermal annealing. It was found that both the resistivity and the Hall resistivity decrease by two orders of magnitude upon annealing at 520 °C, accompanied by a crossover from an approximately 2lnT dependence of resistivity to a metallic behavior. On the other hand, transmission...

Out of plane vibrations are suppressed in graphene layers placed on a substrate. These vibrations, in suspended samples, are relevant for the understanding of properties such as the electrical resistivity, the thermal expansion coefficient, and others. We use a general framework to study the properties of the out of plane mode in graphene on different substrates, taking into account the dynamic...

This paper suggests the modeling methods of non-uniform substrate resistivity for substrate resistance extraction. Conventional substrate model of uniform resistivity for each substrate layer can cause about 40-80% resistance extraction errors. Though model of simulated doping profile theoretically provides fine accuracy, the doping profile cannot be corrected with measurement results. The step...