We have developed an RF accelerating system for a compact ion synchrotron. The RF cavity is an untuned type loaded with FINEMET cores, which have high complex permeability, high saturation flux density, and high Curie temperature properties. A new power feeding method, “multi-feed coupling,” was developed to match the cavity impedance with output impedance of a solidstate RF amplifier. We have ...

This paper considers a variety of problems in the design of selective RF-pulses. We apply a formula of Zakharov and Manakov to directly relate the energy of an RF-envelope to the magnetization profile and certain auxiliary parameters used in the inverse scattering transform (IST) approach to RF-pulse synthesis. This allows a determination of the minimum possible energy for a given magnetization...

Higher field strengths entail less homogeneous RF fields. This may influence quantitative MRI and MRS. A method for rapidly mapping the RF field in the human head with minimal distortion was developed on the basis of a single-shot stimulated echo acquisition mode (STEAM) sequence. The flip angle of the second RF pulse in the STEAM preparation was set to 60 degrees and 100 degrees instead of 90 ...

Specific emitter identification (SEI) can distinguish communication radio emitters with the fingerprint features carried by received signal, and this technology has been widely used in military civilian fields. However, real electromagnetic environment, number of is large signal-to-noise ratio (SNR) low, which leads to poor nonlinear analysis SEI a single domain. Therefore, combining exploratio...

Random forests (RF) is one of a broad class of machine learning methods that are able to deal with large-scale data without model specification, which makes it an attractive method for genome-wide association studies (GWAS). The performance of RF and other association methods in the presence of interactions was evaluated using the simulated data from Genetic Analysis Workshop 16 Problem 3, with...

The fabrication and characterization of a radio frequency (RF) micromachined switch with annealing were presented. The structure of the RF switch consists of a membrane, coplanar waveguide (CPW) lines, and eight springs. The RF switch is manufactured using the complementary metal oxide semiconductor (CMOS) process. The switch requires a post-process to release the membrane and springs. The post...

OBJECTIVE to identify the prevalence of nursing diagnosis Sedentary lifestyle (SL) and to analyze its association with clinical indicators (CI) and related factors (RF) in patients with hypertension. METHOD cross-sectional study with 285 patients with hypertension at a reference center for outpatient care in Northeastern Brazil. To collect data it was used an instrument based on operational d...

everal different approaches have been proposed for targeting the pulmonary veins (PVs) or atria in catheter ablation for atrial fibrillation (AF). It was initially focal radiofrequency (RF) application inside the PV, then PV ostial isolation by segmental RF applications guided by a circular mapping catheter was developed (EP-guided method).1 Another standard method, circumferential PV isolation...