We review our recent magnetotransport and micromagnetic studies of lithographically defined epitaxial thin film structures of body-centered-cubic Fe and hexagonal-closed-packed ~hcp! Co with stripe domains. Micromagnetic structure and resistivity anisotropy are shown to be the predominant sources of low field magnetoresistance ~MR! in these microstructures, with domain wall ~DW! effects smaller...

The temperature dependence of electrical resistivity was measured for three materials: a conductor (copper), a semiconductor (a carbon resistor), and a doped semiconductor (a pn junction). As expected, the resistance of the copper sample decreased with temperature and the resistance of the carbon resistor increased with temperature. The temperature coefficient of resistance of Cu was calculated...

New combined optical/thermal method (optical DLTS) for the investigation of gap states is presented. The concentration and energy distribution of the gap states have been studied. The optical DLTS signal S(T) vs. temperature is calculated from the photoconductivity decay I(t,T). The effective levels and density of states for amorphous Se and As2Se3 films were obtained. Introduction.Recently, th...

Pertamina has conducted geothermal exploration in Sumatra showing that the depths to the top of most of the geothermal reservoirs are about 1000-2000 meters. Previous geophysical exploration work by Pertamina emphasized the use of DC-resistivity methods such as the Schlumberger method. However, these techmques can typically only penetrate to a depth of less than 1000 meters and are too shallow ...

Abstract Background Pulmonary veins isolation (PVI) represents the main strategy for paroxysmal atrial fibrillation (AF) treatment. Due to poor clinical outcomes of PVI in case non–paroxysmal AF, significant efforts have been made develop new ablative strategies modify substrate. Up now, order characterise substrate, only bipolar voltage maps used and impedance mapping has never evaluated. Purp...

The use of nano materials, particularly copper is of interest, in areas like printed electronics and chemical engineering. Copper is highly conductive in nature and thin films on a substrate makes the structure more significant. Printing copper requires melting of macro size particles conventionally, whereas the viscous mixture of nano ink composition, utilizing spray mechanism in 3D printing f...

Calu-3 cells secrete HCO(3)(-) in response to cAMP agonists but can be stimulated to secrete Cl(-) with K(+) channel activating agonists. Microelectrode and impedance analysis experiments were performed to obtain a better understanding of the conductances and driving forces involved in these different modes of anion secretion in Calu-3 cells. Microelectrode studies revealed apical and basolater...

Earthing system is an essential part of electrical installation as it helps in eliminating shock hazards and also provide zero voltage reference point for the equipment. Design earthing involves, measurement soil resistivity proposed site electrode & determining conductor type required number earth electrodes order to achieve resistance value. This paper describes methodology followed desig...

The use of vaginal electrical resistance (VER) for estrous detection and early pregnancy diagnosis were evaluated using three experiments in dairy cattle, in Ethiopia. VER was measured: 1) during the natural estrous (n = 60) cycle, 2) during estrus induced by GnRH+ PGF2· (n = 11) and 3) during post insemination in dairy cows synchronized with GnRH+CIDR+PGF2· (n = 25). Results from Experiment 1 ...