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The drugs delivered in the central nervous system can be used for the treatment of Parkinson or Alzheimer by acting directly in the affected zones. The problem is that the Blood Brain Barrier (BBB), only allows the passage of certain substances to protect the brain. The focused ultrasound (FUS) with ultrasonic contrast agents (UCA), have demonstrated the reversible opening of the BBB. This paper presents...
The high-intensity focused ultrasound (HIFU) has shown positive results in the treatment of prostate cancer and its possible application in neurodegenerative diseases. This paper describes the design of a HIFU applicator with a conical geometry, for modeling the software COMSOL® (COMSOL Inc., Burlington, MA) was used, which bases its operation on the finite element method (FEM). The equations that...
A practical and novel technique to compute the leakage reactance of step lap-core power transformers is presented. It can be applied to helical or continual disc windings. The developed technique is based on computing the magnetic flux lines produced by each active conductor in the windings. Thus, the magnetic linkages are obtained by applying the concept of geometric mean distance of rectangular...
Power flow control in transmission networks requires new approaches to deal with the uncertainties in the power flow patterns caused by the massive integration of renewable energy generators and the difficulties for constructing new transmission corridors, due to environmental restrictions and social opposition. One solution explored nowadays by utilities is the installation of SSSCs in congested...
We analyze the State of Art in computational methods, employed for analyzing the two-dimensional Electrical Impedance Tomography problem (EIT). We broach an assortment of techniques that may be considered among the most important innovations on this area, emphasizing that the Finite Element Method has played a central role for solving the forward problem of the Electrical Impedance Equation, backbone...
Micro alloyed steels mechanical properties can be modified by nano-modification based on aging heat treatments inducing different levels of nano precipitates on their surface microstructure. Under sour corrosion, electrochemical impedance spectroscopy (EIS) technique could serve to identify the modified micro alloyed steel corrosion properties. This paper present a predictive model for EIS-Ny quist...
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