نتایج جستجو برای: resistivity profiling

تعداد نتایج: 95743  

2015
G. Parthasarathy Luca Bindi

We report here pressure dependence of the electrical resistivity of natural kalsilite (K0.998Na0.002Al0.998Fe0.002SiO4) from a granulite facies terrain in southern India. The electrical resistivity of kalsilite was measured with four probe technique up to 7.5 GPa at room temperature. The electrical resistivity decreases continuously with the increase of pressure up to 3.7 GPa, where there is a ...

2017
Ahzegbobor P. Aizebeokhai Kehinde D. Oyeyemi Funmilola R. Noiki Blessing I. Etete Akpore U.E. Arere Ubongabasi J. Eyo Valentino C. Ogbuehi

This article consists of geoelectrical resistivity data sets for thirty (30) vertical electrical sounding (VES) and four (4) traverses of 2D electrical resistivity imaging (ERI) collected within Iyesi, Ota, southwestern Nigeria for about five (5) weeks between December, 2016 and January, 2017 using an ABEM Terrameter (SAS1000/4000). The observed apparent resistivity data sets for the VES were p...

2009
Keizo FUJIMOTO Richard D. SYDORA

A three-dimensional particle-in-cell simulation in a large system demonstrates that a kink mode significantly contributes to a fast reconnection by providing magnetic dissipation through anomalous resistivity. The anomalous resistivity is generated due to the electron heating in the thin electron current sheet. It is interesting that, although the kink mode broadens the width of the current she...

2011
A. Razmara P. Khorshid M. Ghoranneviss H. Arabshahi

The Plasma resistivity has been measured in the edge plasma of IR-T1 tokamak. To achive the edge plasma properties ( Te and ne ) using I-V characteristics of movable single langmuir probe. Density and temperature of electron, respectively ne and Te, are measured simultaneously for calculating the radial profile of parallel and vertical resistivity. As temperature of plasma raised, resistivity d...

H. Savaloni K. Khojier,

This paper reports the correlation between film thickness, nanostructure and DC electrical properties of copper thin films deposited by PVD method on glass substrate. X-ray diffraction (XRD) and atomic force microscopy (AFM) were used for crystallography and morphology investigation, respectively. Resistivity was measured by four point probe instrument, while a Hall effects measurement system w...

Journal: :journal of physical & theoretical chemistry 2009
. thanasanvorakun pongsri mangkomtong majid monajjemi nikom sangkorntong

sn02 nanowires with diameters of 30 — 200 nm have been synthesized by using carbothermalprocess via a thick film of tin dioxide and carbon powder precursor. the nanowires werecharacterized by x-ray power diffraction (xrd), scanning electron microscopy (sem),transmission electron microscopy (tem) and selected area electron diffraction (saed).the gas sensing characteristic of nanowires toward eth...

Journal: :Environmental monitoring and assessment 2011
Mohamad Faizal Tajul Baharuddin Samsudin Taib Roslan Hashim Mohd Hazreek Zainal Abidin Mohd Fakhrurrazi Ishak

Time-lapse resistivity measurements and groundwater geochemistry were used to study salinity effect on groundwater aquifer at the ex-promontory-land of Carey Island in Malaysia. Resistivity was measured by ABEM Terrameter SAS4000 and ES10-64 electrode selector. Relationship between earth resistivity and total dissolved solids (TDS) was derived, and with resistivity images, used to identify wate...

2011
Herman Wahid Hiep Nguyen-Duc

Since the last few decades, electrical methods have been widely used in geophysical surveying to obtain high-resolution information about subsurface conditions. Resistivity is an important parameter in judging the ground properties, especially detecting buried objects of anomalous conductivity. Electrical DC resistivity sounding is the commonly used technique to obtain the apparent 2-D resistiv...

2015
Martyn Unsworth Fatih Bulut Ilyas Çağlar

Magnetotelluric (MT) studies can map subsurface resistivity structure and have located zones of low resistivity (high conductivity) within major strike-slip fault zones worldwide which have been interpreted as regions of elevated fluid content. This study describes MT data from the eastern part of the North Anatolian and the East Anatolian Fault Systems (NAFS and EAFS) and presents the results ...

2003
Russell L. Detwiler Jeffery J. Roberts William Ralph Brian P. Bonner

Phase change of pore fluid (boiling/condensing) in rock cores under conditions representative of geothermal reservoirs results in alterations of the electrical resistivity of the samples. In fractured samples, phase change can result in resistivity changes that are more than an order of magnitude greater than those measured in intact samples. These results suggest that electrical resistivity mo...

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