─ Due to the limited size of antenna and electromagnetic loss of human head tissue, implantable miniaturized antennas suffer low radiation efficiency. This work presents simulation and analysis of implantable antennas for a wireless RF-powered brain machine interface applications. The accuracy and stability of antenna input impedance simulation are presented. The effects of the implanted antenn...

The objective of this study is to develop a device for noninvasive local tissue electrical impedance tomography (EIT) using divided electrodes with guard electrodes and to validate its effectiveness using bioequivalent phantoms. For this purpose, we prepared a measurement device and bioequivalent phantoms, measured the electrical characteristics of the phantoms, and validated the method using t...

BACKGROUND Electrical impedance tomography (EIT) is a non-invasive bedside tool which allows an individualized ventilator strategy by monitoring tidal ventilation and lung aeration. EIT can be performed at different cranio-caudal thoracic levels, but data are missing about the optimal belt position. The main goal of this prospective observational study was to evaluate the impact of different el...

A numerical technique, finite element analysis (FEA) was used to model the electrical properties, the bio impedance of the bladder tissue in order to predict the bladder cancer. This model results showed that the normal bladder tissue have significantly higher impedance than the malignant tissue that was in opposite with the impedance measurements or the experimental results. Therefore, this di...

Data access layers are an ubiquitous issue in enterprise applications. In a great number of companies a relational database coexists with an object oriented middleware and the applications have to deal with that. The impedance mismatch between both models is very well known among the software development community. In order to cope with it several approaches have emerged (ORMs, DMT, mappings, c...

Subcutaneous fat layer thickness in the abdomen is a risk indicator of several diseases and disorders like diabetes and heart problems and could be used as a measure of fitness. Skinfold measurement using mechanical calipers is simple but prone to error. Ultrasound scanning techniques are yet to be established as accurate methods for this purpose. magnetic resonance imaging (MRI) and computed t...

Magnetic properties and changes of impedance upon external field ~MI! are studied in amorphous CoP magnetic layers obtained by galvanostatic electrodeposition over cylindrical Cu substrates. The magnetic layer thickness is controlled by deposition time and varies between 3 and 7 mm. Due to the columnar growth of Co, thicker layers have stronger perpendicular radial anisotropy. The field and fre...

in this study, a novel variable impedance control for a lower-limb rehabilitation robotic system using voltage control strategy is presented. the majority of existing control approaches are based on control torque strategy, which require the knowledge of robot dynamics as well as dynamic of patients. this requires the controller to overcome complex problems such as uncertainties and nonlinearit...