Results 21 to 30 of about 351,150 (284)

Processing of noisy magnetotelluric time series from Koyna-Warna seismic region, India: a systematic approach

open access: yesAnnals of Geophysics, 2015
Rolling array pattern broad band magnetotelluric (MT) data was acquired in the Koyna-Warna (Maharashtra, India) seismic zone during 2012-14 field campaigns.
Ujjal K. Borah   +2 more
doaj   +1 more source

OC, HPC, UHPC and UHPFRC Corrosion Performance in the Marine Environment

open access: yesBuildings, 2023
This work aims to study the corrosion performance of six concretes in the marine environment: three ordinary concretes (C30, C40 and C50); one high-performance concrete (C90); two ultra high-performance concretes, one without fibres (C150-NF) and another
Josep Ramon Lliso-Ferrando   +3 more
doaj   +1 more source

Model for the magnetoresistance and Hall coefficient of inhomogeneous graphene [PDF]

open access: yes, 2008
We show that when bulk graphene breaks into n-type and p-type puddles, the in-plane resistivity becomes strongly field dependent in the presence of a perpendicular magnetic field, even if homoge- neous graphene has a field-independent resistivity.
Stroud, D., Tiwari, Rakesh P.
core   +2 more sources

The role of geophysics in enhancing mine planning decision-making in small-scale mining [PDF]

open access: yesRoyal Society Open Science, 2020
Small-scale mining usually operates under high geological uncertainty conditions. This turns mine planning into a complex and sometimes inaccurate task, resulting in low productivity and substantial variability in the quantity and quality of the mineral ...
Ricardo Tichauer   +3 more
doaj   +1 more source

The structural and dielectric properties of lanthanum substituted strontium based spinel ferrites nano-materials for high frequency device applications

open access: yesJournal of Taibah University for Science, 2023
Lanthanum substitution on spinel Nano particles has a significant repercussion on the several features of materials. Sol–gel (auto-ignition) allowed for the substitution of the rare earth lanthanum ion (La3+) for spinel ferrite with composition SrLaxFe2 ...
A. Alhadhrami   +2 more
doaj   +1 more source

Influence of Li2CO3 addition on electrical and magnetic properties of Ni0.6Mg0.4Fe2O4 [PDF]

open access: yesJournal of Advanced Dielectrics, 2020
In this research, influence of adding Li2CO3 (at 0%, 2%, 4%, 6%) on electrical and magnetic properties of Ni0.6Mg0.4Fe2O4 (with 60% Ni and 40% Mg) ferrite has been studied.
M. R. Hassan, M. T. Islam, M. N. I. Khan
doaj   +1 more source

Electrical permittivity and resistivity time lapses of multiphase DNAPLs in a lab test [PDF]

open access: yes, 2014
Dense Non-Aqueous Phase Liquids (DNAPLs) induce variation in electromagnetic characteristics of the ground e.g. electric permittivity and resistivity.
Orlando, Luciana, Renzi, Beatrice
core   +2 more sources

Modelling of changes in the resistivity of semi-insulating materials [PDF]

open access: yesMetrology and Measurement Systems, 2021
Electrical properties of semiconductor materials depend on their defect structure. Point defects, impurities or admixture contained in a semiconductor material, strongly affect its properties and determine the performance parameters of devices made on ...
Marek Suproniuk
doaj   +1 more source

Deviations from Matthiessen rule and resistivity saturation effects in Gd and Fe [PDF]

open access: yes, 2013
According to earlier first-principles calculations, the spin-disorder contribution to the resistivity of rare-earth metals in the paramagnetic state is strongly underestimated if Matthiessen's rule is assumed to hold.
Belashchenko, K. D.   +2 more
core   +3 more sources

Measurement uncertainty evaluation of automatic Tan Delta and resistivity test set for transformer oil [PDF]

open access: yesInternational Journal of Metrology and Quality Engineering, 2012
Quality of transformer oil plays vital role in the performance of transformer in electrical appliances. Measurement uncertainty is a general concept associated with any measurement and can be used in professional decision processes as well as judging ...
Mandavgade N.K., Jaju S.B., Lakhe R.R.
doaj   +1 more source

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