Continuous Electrical Conductivity Variation in M3(Hexaiminotriphenylene)2 (M = Co, Ni, Cu) MOF Alloys

2020 ◽  
Vol 142 (28) ◽  
pp. 12367-12373 ◽  
Author(s):  
Tianyang Chen ◽  
Jin-Hu Dou ◽  
Luming Yang ◽  
Chenyue Sun ◽  
Nicole J. Libretto ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Variation

Investigation of dryland salinity using the electrical image method

Soil Research ◽  
1999 ◽  
Vol 37 (4) ◽  
pp. 623 ◽  
Author(s):  
R. I. Acworth
Keyword(s):  
Electrical Conductivity ◽  
Salt Content ◽  
Image Method ◽  
Dryland Salinity ◽  
Conductivity Variation ◽  
South Wales ◽  
Electrical Imaging ◽  
Profile Line ◽  
Conductivity Anomalies ◽  
A Site

Electrical imaging is a 2-dimensional investigation method that can be used to rapidly determine subsurface conductivity variation. In dryland salinity studies, electrical imaging is used to define the vertical extent of high electrical conductivity zones first identified using electromagnetic (EM) profiling equipment. Field techniques are described using 25 or 50 electrodes, connected to a resistance meter by a multi-core cable, to obtain images at a variety of electrode separations. The model of electrical conductivity variation obtained by an inversion of the field data is shown to agree very well with the results of detailed field investigations, including data from soil sampling, 1 : 5 extract analysis, and borehole electrical conductivity logging. Results are described from the Liverpool Plains at Yarramanbah Creek and Round Island, where a thick sequence of smectite clay overlies sands and gravels. The image clearly identifies zones of high salt content in the clay which have been sampled and logged using borehole measurements of electrical conductivity. Results are also described from a dryland salinity area in the upper part of Dicks Creek catchment on the Southern Tablelands of New South Wales. These data show the extent of clay overlying bedrock and correlate very well with the results of 1 : 5 extract analysis from shallow piezometers along the profile line. Electrical imaging is an appropriate follow-up method for the investigation of electrical conductivity anomalies first identified by EM profiling and is advisable before drilling at a site to optimise the location of piezometers.

scholarly journals Electrospray characteristics of aqueous KCl solutions with various electrical conductivities

2018 ◽  
Author(s):  
Sahand Faraji ◽  
Behnam Sadri ◽  
Babak Vajdi Hokmabad ◽  
Esmaeil Esmaeilzadeh ◽  
Navid Jadidoleslam
Keyword(s):  
Electrical Conductivity ◽  
Experimental Study ◽  
Stainless Steel ◽  
High Voltage ◽  
Room Temperature ◽  
High Voltage Electrode ◽  
Flow Rates ◽  
Conductivity Variation ◽  
Electrical Conductivities ◽  
Stainless Steel Ring

In the present experimental study, the effects of electrical conductivity on electrospraying procedure are investigated.A metallic nozzle with 600 m ID as high voltage electrode and a stainless steel ring as a groundelectrode were employed. Experiments were carried out in still room temperature. Four different aqueous KClsolutions were sprayed in various high voltages and flow rates. Results confirm that spraying modes changeswith conductivity variation. For forming a cone shape, emerging from the nozzle, required applied electric fielddecreases with conductivity increasing. Results also revealed that conductivity of dispersed solution acts a mainrole on forming and elongation of the cones in electrospraying procedure. The size and velocity of emanateddroplets are also investigated in order to gaining some insight to the electrospraying phenomenon.

scholarly journals A 2D Magneto-Acousto-Electrical Tomography Method to Detect Conductivity Variation Using Multifocus Image Method

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2373 ◽  
Author(s):  
Ming Dai ◽  
Xin Chen ◽  
Tong Sun ◽  
Lingyao Yu ◽  
Mian Chen ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Chirp Pulse ◽  
Image Method ◽  
Electrical Tomography ◽  
Conductivity Distribution ◽  
Conductivity Variation ◽  
Shaped Hole ◽  
Imaging Resolution ◽  
Single Focus ◽  
Pulse Stimulation

As magneto-acoustic-electrical tomography (MAET) combines the merits of high contrast and high imaging resolution, and is extremely useful for electrical conductivity measurement, so it is expected to be a promising medical imaging modalities for diagnosis of early-stage cancer. Based on the Verasonics system and the MC600 displacement platform, we designed and implemented a MAET system with a chirp pulse stimulation (MAET-CPS) method and a focal probe was utilized for stepscan focus excitation to enhance the imaging resolution. The relevant experiments were conducted to explore the influence of excitation positions of the single-focus point, and the effect of the excitation position on the amplitudes of the conductivity variation was clearly demonstrated. In order to take advantage of the merits of multifocus imaging, we firstly proposed a single focus MAET system with a chirp pulse stimulation (sfMAET-CPS) method and a multifocus MAET system with a chirp pulse stimulation (mfMAET-CPS) method for high-resolution conductivity imaging, and a homogenous gelatin phantom with a cuboid-shaped hole was used to investigate the accuracy of mfMAET-CPS. Comparative experiments were carried out on the same uniform phantom by the sfMAET-CPS and the mfMAET-CPS, respectively. The results showed that: (1) the electrical conductivity distributions of the homogenous phantom with a cuboid-shaped hole were detected by the sfMAET-CPS but were easily affected by the focal point, which demonstrated that the sfMAET-CPS had a low imaging resolution. (2) Compared with the sfMAET-CPS, the imaging effect of the mfMAET-CPS was much better than that of the sfMAET-CPS. (3) A linear interpolation algorithm was used to process the 2D conductivity distribution; it increased the smoothness of the conductivity distribution and improved the imaging effect. The stepscan focus excitation and the linearly frequency-modulated theory provide an alternative scheme for the clinical application of MAET.

A model for the electrical conductivity variation of molten polymer filled with carbon nanotubes under extensional deformation

2018 ◽  
Vol 168 ◽  
pp. 111-117 ◽  
Author(s):  
Marjorie Marcourt ◽  
Philippe Cassagnau ◽  
René Fulchiron ◽  
Dimitri Rousseaux ◽  
Olivier Lhost ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Extensional Deformation ◽  
Molten Polymer ◽  
Conductivity Variation

Pozzolanic Activity of Wastes from Fired Clay Ceramic Industry for Incorporation into Concrete

2015 ◽  
Vol 820 ◽  
pp. 515-519
Author(s):  
Mateus de Souza Furriel Dias ◽  
Leonardo Gonçalves Pedroti ◽  
Carlos Mauricio Fontes Vieira ◽  
Sérgio Neves Monteiro ◽  
Gustavo de Castro Xavier ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Environmental Degradation ◽  
Ceramic Industry ◽  
Bottom Ash ◽  
Pozzolanic Activity ◽  
Variation Method ◽  
Moderate Activity ◽  
Conductivity Variation ◽  
Viable Solution ◽  
Different Types

The fired-clay ceramic industry generates relatively large amount of wastes mainly bottom ashes remaining in the firing furnaces and broken pieces, known as grog, from inappropriate products. These wastes, if inadequately disposed, may cause pollution associated with environmental degradation as well as health hazards. A viable solution for these wastes is their incorporation in concrete for civil construction, as long as they have pozzolanic activity. Therefore the present work evaluated the pozzolanic activity of three different types of wastes generated at the same ceramic industry. These wastes were a furnace remaining bottom ash from burning wood log, a similar ash from sawdust burning and a grog powder from higher firing temperature broken ceramics. The pozzolanic activity was measured by the electrical conductivity variation method. The results showed that both ashes are not provided with pozzolanic activity while the grog has a moderate activity.

scholarly journals Coordination-induced reversible electrical conductivity variation in the MOF-74 analogue Fe2(DSBDC)

2018 ◽  
Vol 47 (34) ◽  
pp. 11739-11743 ◽  
Author(s):  
Lei Sun ◽  
Christopher H. Hendon ◽  
Mircea Dincă
Keyword(s):  
Electrical Conductivity ◽  
Electron Transfer ◽  
Conductivity Variation

DMF coordination to Fe centers induces partial electron transfer and improves electrical conductivity in Fe2(DSBDC) by three orders of magnitude.

Sign in / Sign up

Export Citation Format

Share Document