Measurement of the electrical conductivity profile and of ionization processes in gas detonators

1984 ◽  
Vol 20 (1) ◽  
pp. 104-113 ◽  
Author(s):  
A. V. Pinaev ◽  
A. I. Sychev
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Profile ◽  
Ionization Processes

Chemical reaction zone and electrical conductivity profile in detonating high explosives

2019 ◽  
Vol 206 ◽  
pp. 249-251 ◽  
Author(s):  
Nataliya P. Satonkina ◽  
Alexander P. Ershov ◽  
Andrey V. Plastinin ◽  
Alexander S. Yunoshev
Keyword(s):  
Electrical Conductivity ◽  
Reaction Zone ◽  
Chemical Reaction ◽  
High Explosives ◽  
Chemical Reaction Zone ◽  
Conductivity Profile

Estimation of the plant available water capacity of a soil profile

Soil Research ◽  
1981 ◽  
Vol 19 (3) ◽  
pp. 197 ◽  
Author(s):  
JA Mullins
Keyword(s):  
Electrical Conductivity ◽  
Soil Profile ◽  
Feature Model ◽  
Alternative Technique ◽  
Dryland Agriculture ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Conductivity Profile ◽  
Plant Available Water

The plant available water capacity (PAWC) was measured for a range of soils (black earths, grey, brown and red clays, krainozems, yellow earths and solodized solonetz/solodics) used for dryland agriculture in the uplands of th,- eastern Darling Downs of Queensland. Using these data, two one-parameter models - one based on the electrical conductivity profile and the other on observable profile features - were derived for estimating the PAWC of the soil profile. The electrical conductivity profile model reliably estimated the PAWC for black earths and grey, brown and red clays. In the case of the deep, black earths, it accounted for 90% of the variation. The observable profile feature model reliably estimated the PAWC for black earths and grey, brown and red clays and in the case of the grey, brown and red clays accounted for 88% of the variation. The models for the solodized solonetz/solodics were not significant. In addition the profile feature model provided estimates of PAWC for the krasnozems (grouped with black earths) and for the yellow earths and solodized solonetz/solodics as a group. An alternative technique for the estimation of PAWC for krasnozems and yellow earths is also presented. The techniques will provide a rapid first appraisal of the PAWC of a soil profile.

Lunar Electrical Conductivity Profile

Nature ◽  
1971 ◽  
Vol 232 (5308) ◽  
pp. 249-251 ◽  
Author(s):  
A. F. KUCKES
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Profile

scholarly journals Mantle electrical conductivity profile of Niger delta region

2014 ◽  
Vol 123 (4) ◽  
pp. 827-835 ◽  
Author(s):  
Daniel N Obiora ◽  
Francisca N Okeke ◽  
K Yumoto ◽  
Stan O Agha
Keyword(s):  
Electrical Conductivity ◽  
Niger Delta ◽  
Delta Region ◽  
Niger Delta Region ◽  
Conductivity Profile

scholarly journals Constraining the depth of the winds on Uranus and Neptune via Ohmic dissipation

2020 ◽  
Vol 498 (1) ◽  
pp. 621-638
Author(s):  
Deniz Soyuer ◽  
François Soubiran ◽  
Ravit Helled
Keyword(s):  
Electrical Conductivity ◽  
Planetary Science ◽  
Interior Structure ◽  
Ohmic Dissipation ◽  
Water Abundance ◽  
Ab Initio Simulations ◽  
Outer Planets ◽  
Planetary Magnetic Fields ◽  
Conductivity Profile ◽  
Entropy Flux

ABSTRACT Determining the depth of atmospheric winds in the outer planets of the Solar system is a key topic in planetary science. We provide constraints on these depths in Uranus and Neptune via the total induced Ohmic dissipation, due to the interaction of the zonal flows and the planetary magnetic fields. An upper bound can be placed on the induced dissipation via energy and entropy flux throughout the interior. The induced Ohmic dissipation is directly linked to the electrical conductivity profile of the materials involved in the flow. We present a method for calculating electrical conductivity profiles of ionically conducting hydrogen–helium–water mixtures under planetary conditions, using results from ab initio simulations. We apply this prescription on several ice giant interior structure models available in the literature, where all the heavy elements are represented by water. According to the energy (entropy) flux budget, the maximum penetration depth for Uranus lies above 0.93 RU (0.90 RU) and for Neptune above 0.95 RN (0.92 RN). These results for the penetration depths are upper bounds and are consistent with previous estimates based on the contribution of the zonal winds to the gravity field. As expected, interior structure models with higher water abundance in the outer regions also have a higher electrical conductivity and therefore reach the Ohmic limit at shallower regions. Thus, our study shows that the likelihood of deep-seated winds on Uranus and Neptune drops significantly with the presence of water in the outer layers.

scholarly journals Lunar Magnetic Field Measurements, Electrical Conductivity Calculations and Thermal Profile Inferences

1972 ◽  
Vol 47 ◽  
pp. 355-371
Author(s):  
D. S. Colburn
Keyword(s):  
Magnetic Field ◽  
Electrical Conductivity ◽  
Eddy Currents ◽  
Field Measurements ◽  
Electromagnetic Environment ◽  
Lunar Interior ◽  
A Value ◽  
Magnetic Field Measurements ◽  
Conductivity Profile ◽  
Steady Magnetic Field

Steady magnetic field measurements of magnitude 30 to 100 γ on the lunar surface impose problems of interpretation when coupled with the non-detectability of a lunar field at 0.4 lunar radius altitude and the limb induced perturbations of the solar wind reported by Mihalov et al. at the Explorer orbit. The lunar time varying magnetic field clearly indicates the presence of eddy currents in the lunar interior and allows calculation of an electrical conductivity profile. The problem is complicated by the day-night asymmetry of the Moon's electromagnetic environment, the possible presence of the TM mode and the variable wave directions of the driving function. The electrical conductivity is calculated to be low near the surface, rising to a peak of 6 × 10−3Ω−1 m−1 at 250 km, dropping steeply inwards to a value of about 10−5Ω−1 m−1, and then rising toward the interior. A transition at 250 km depth from a high conductivity to a low conductivity material is inferred, suggesting an olivine-like core at approximately 800 °C, although other models are possible.

Lunar Electrical Conductivity Profile

Nature ◽  
1971 ◽  
Vol 230 (5293) ◽  
pp. 359-362 ◽  
Author(s):  
C. P. SONETT ◽  
D. S. COLBURN ◽  
P. DYAL ◽  
C. W. PARKIN ◽  
B. F. SMITH ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Profile

Oceanic tidal signals in satellite magnetic data: quo vadis?

2020 ◽  
Author(s):  
Alexander Grayver ◽  
Nils Olsen ◽  
Chris Finlay ◽  
Alexey Kuvshinov
Keyword(s):  
Electrical Conductivity ◽  
Upper Mantle ◽  
Field Measurements ◽  
Magnetic Data ◽  
Ocean Tides ◽  
Magnetic Signature ◽  
Global Mapping ◽  
Conductivity Profile ◽  
Quo Vadis ◽  
Tidal Constituents

<p>The continuous high-quality geomagnetic field measurements delivered by the Swarm satellite constellation trio have enabled reliable global mapping of the magnetic signature of ocean tides for several tidal constituents. These signals provide geophysical constraints on the average electrical conductivity profile of the upper mantle below the oceans. In principle, these signals can also sense lateral variations of the electrical conductivity in the oceanic upper mantle, although the amplitude of these effects is small. Additionally, the long-term changes in the climatology of the ocean can be potentially detected by the magnetic satellite signals. Both applications put additional demands on the accuracy and resolution of the extracted signals. This contribution discusses potential ways to meet the required demands and evaluates the feasibility of using the magnetic signature of ocean tides for studying these effects.</p>

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