The results of three–dimensional electrotomography of Tokarev crater (Karymsky volcanic center, Kamchatka)

2020 ◽  
Author(s):  
Sofiya P. Grakhova ◽  
◽  
Svetlana B. Bortnikova ◽  
Grigoriy L. Panin ◽  
◽  
...  
Keyword(s):  
Direct Current ◽  
Three Dimensional ◽  
Current Method ◽  
Volcanic Center ◽  
Sufficient Detail ◽  
Karymsky Volcanic Center

In the summer, studies were carried out on the Tokarev crater (Karymsky Volcanic Center, Kamchatka). The results of three–dimensional electrotomography are obtained, which describe in sufficient detail the topography and heterogeneities of the bottom. The studies were carried out using the author’s floating installation of multi–electrode sounding by the direct current method based on Iris Syscal Pro equipment. The depth of research did not exceed 80 meters, which was enough to describe the structure of the Maar.

scholarly journals 3D MODELLING OF THE FAULT STRUCTURE IN THE SOUTHERN PART OF THE KURAISKAYA BASIN ACCORDING TO DIRECT CURRENT METHOD DATA

2021 ◽  
Vol 2 (2) ◽  
pp. 265-271
Author(s):  
Aidisa M. Sanchaa ◽  
Irina V. Surodina ◽  
Nina N. Nevedrova
Keyword(s):  
Direct Current ◽  
Tilt Angle ◽  
Fault Plane ◽  
Three Dimensional ◽  
Current Method ◽  
3D Modelling ◽  
Fault Structure ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling

In this article we present the results of three-dimensional modeling of the fault structure of the Salgandui block of the Kuraikaya basin. The modeling included finding out the tilt angle of the fault plane displacer.

scholarly journals Multiscale Coupling of Transcranial Direct Current Stimulation to Neuron Electrodynamics: Modeling the Influence of the Transcranial Electric Field on Neuronal Depolarization

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Edward T. Dougherty ◽  
James C. Turner ◽  
Frank Vogel
Keyword(s):  
Electric Field ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Three Dimensional ◽  
Human Head ◽  
Multiscale Model ◽  
Medical Intervention ◽  
Medical Community ◽  
Computational Grids ◽  
Direct Current Stimulation

Transcranial direct current stimulation (tDCS) continues to demonstrate success as a medical intervention for neurodegenerative diseases, psychological conditions, and traumatic brain injury recovery. One aspect of tDCS still not fully comprehended is the influence of the tDCS electric field on neural functionality. To address this issue, we present a mathematical, multiscale model that couples tDCS administration to neuron electrodynamics. We demonstrate the model’s validity and medical applicability with computational simulations using an idealized two-dimensional domain and then an MRI-derived, three-dimensional human head geometry possessing inhomogeneous and anisotropic tissue conductivities. We exemplify the capabilities of these simulations with real-world tDCS electrode configurations and treatment parameters and compare the model’s predictions to those attained from medical research studies. The model is implemented using efficient numerical strategies and solution techniques to allow the use of fine computational grids needed by the medical community.

Determination of Dipole Spacing in Electrical Landfill Leakage Detection

2010 ◽  
Vol 171-172 ◽  
pp. 171-174
Author(s):  
Hong Cheng ◽  
Peng Kun Liu ◽  
Yu Ling Wang ◽  
Chang Xin Nai
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Current Method ◽  
Leakage Detection ◽  
High Voltage Direct Current ◽  
The Impact

The dipole spacing can directly affects the detecting sensitivity and accuracy in the landfill leakage detection by the high voltage direct current method. Based on the high voltage DC detecting model, the impact of dipole spacing on locating leaks is analyzed taking a single leak and multiple leaks as example. The results show that the greater the dipole spacing is, the higher the detecting sensitivity is; the smaller the dipole spacing is, the higher the detecting accuracy is. For multiple leaks, only one leak can be located when the dipole spacing is greater than the distance between the two leaks. In order to detect all leaks correctly, the dipole spacing should be smaller than the distance between the two leaks.

Compact Two Degrees-of-Freedom External Fixator System for Correction of Persistent Clubfoot Deformity

2019 ◽  
Vol 13 (2) ◽  
Author(s):  
Ying Ying Wu ◽  
Anton Plakseychuk ◽  
Kenji Shimada
Keyword(s):  
External Fixator ◽  
Degrees Of Freedom ◽  
Soft Tissues ◽  
Three Dimensional ◽  
Deformity Correction ◽  
Current Method ◽  
Tissue Growth ◽  
Learning Curves ◽  
Patient Specific ◽  
Two Degrees Of Freedom

Bone deformities are often complex three-dimensional (3D) deformities, and correcting them is difficult. To correct persistent clubfoot deformity in adolescents or adults, an external fixator is sometimes used to encourage tissue growth and preserve healthy tissues. However, it is difficult to set up, resulting in long surgeries and steep learning curves for surgeons. It is also bulky and obstructs patient mobility. In this paper, we introduce a new approach of defining clubfoot deformity correction as a six degrees-of-freedom (6DOF) correction, and then reducing it to just two degrees-of-freedom (2DOF) using the axis-angle representation. Therefore, only two physical trajectory joints are needed, which in turn enables a more compact fixator design. A computer planner was developed to minimize the bulk of the external fixator, and to optimize the distraction schedule to avoid overstretching the soft tissues. This reduces the learning curve for surgeons and shortens surgery time. To validate the system, a patient-specific clubfoot simulator was developed, and four experiments were performed on the clubfoot simulator. The accuracy of midfoot correction was 11 mm and 3.5 deg without loading, and 41 mm and 11.7 deg with loading. While the external fixator has to be more rigid to overcome resistance against correction, the surgical system itself was able to achieve accurate correction in less than 2 h. This is an improvement from the current method, which takes 2.5–4.5 h.

scholarly journals Three dimensional complex plasma structures in a combined radio frequency and direct current discharge

2013 ◽  
Vol 20 (4) ◽  
pp. 043701 ◽  
Author(s):  
S. Mitic ◽  
B. A. Klumov ◽  
S. A. Khrapak ◽  
G. E. Morfill
Keyword(s):  
Radio Frequency ◽  
Direct Current ◽  
Three Dimensional ◽  
Current Discharge ◽  
Complex Plasma ◽  
Direct Current Discharge

scholarly journals Effect of direct current stressing to Cu–Cu bond interface imperfection for three dimensional integrated circuits

2013 ◽  
Vol 106 ◽  
pp. 149-154 ◽  
Author(s):  
Riko I Made ◽  
Peng Lan ◽  
Hong Yu Li ◽  
Chee Lip Gan ◽  
Chuan Seng Tan
Keyword(s):  
Integrated Circuits ◽  
Direct Current ◽  
Three Dimensional ◽  
Current Stressing ◽  
Bond Interface

scholarly journals The Application of COMSOL Multiphysics in Direct Current Method Forward Modeling

2011 ◽  
Vol 3 ◽  
pp. 266-272 ◽  
Author(s):  
Xiaolong Wang ◽  
Hui Yue ◽  
Guangliang Liu ◽  
Zhao Zhao
Keyword(s):  
Direct Current ◽  
Current Method ◽  
Forward Modeling ◽  
Comsol Multiphysics
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