Abstract An energy analyser with the capability of making time-resolved measurements of the instantaneous electron current in a radiofrequency (RF) plasma has been designed and constructed. This current is then reconstructed into the instantaneous I–V characteristic at various phases of the RF cycle. Results are shown for a helicon wave discharge under various conditions. From the first derivat...

Background: Pre-exposure to radiofrequency radiations of mobile phones would significantly increase the survival rate of exposed animals compared to those exposed to a lethal dose of gamma radiation alone. Stimulation of the immune system is believed to be a key mechanism for the induction of this phenomenon, the so-called “adaptive response.” The immune system protects organisms against in...

In elastography, the tissue under investigation is compressed and the resulting strain is estimated from the gradient of the displacement (time-delay) estimates. The displacements are typically estimated by crosscorrelating the radiofrequency (RF) ultrasound signals of the preand postcompressed tissue. One of the parameters used to quantify the resulting quality of the elastogram is the elastog...

BACKGROUND Cerebral diffusion-weighted MRI lesions have been observed after catheter ablation of atrial fibrillation. We hypothesized that conditions predisposing to microembolization could be identified using a porcine model of pulmonary vein ablation and an extracorporeal circulation loop. METHODS AND RESULTS Ablations of the pulmonary veins were performed in 18 swine with echo monitoring. ...

This paper deals with the experimental transmission of analog TV-signal in a fiber-radio scheme using a microwave photonic filter. For that purpose, filtering of a microwave band-pass window located at 2.8GHz is obtained by the interaction of an externally modulated multimode laser diode emitting at 1.5μm associated to the chromatic dispersion parameter of an optical fiber. Transmission of TVsi...

In this work, we model a radiofrequency discharge of hydrogenated silicon nitride in a capacitive coupled plasma reactor using Maxwellian and non-Maxwellian electron energy distribution function. The purpose is to investigate whether there is a real advantage and a significant contribution using non-Maxwellian electron energy distribution function rather than Maxwellian one for determining the ...

In measurement systems operating under various disturbances the probabilistic characteristics of noises are usually known approximately. To improve observation accuracy, a new approach to Kalman’s filter adaptation is proposed. this approach, Covariance Matrix Measurement Noises (CMMN) estimated by accurate measurements detected irregularly mobile object system (from radiofrequency identifiers,...

simple snoring is a social problem, one that can gravely affect the patient's married life. about 40% of men and 20% of women are affected, and it often goes along with sleep-disordered breathing. up to now various surgical techniques have been defined such as uppp(uvulopalatopharyngo plasty), and laser-assisted uvulopalatoplasty (laup). among the surgical methods, raup (radiofrequency assisted...

background and aims:  using methods such as pulsed radiofrequency (prf) and nerve blocks are among the methods used in pain clinics to treat facet-originating low back pain. this study compares two methods of pulsed radiofrequency and facet joint block (fjb)regarding pain recovery and improving disability of patients suffering from facet-originating low back pain. material and method: 50 patien...