—Radio-Frequency (RF) recharging of sensor nodes is a promising way to minimize maintenance and prolong the operational life of wireless sensor networks. In this paper, we present a simple MAC protocol based on polling that includes provisions for on-demand recharging using the same RF band as normal data communications, and we develop a probabilistic performance model to evaluate the impact o...

Cardiac MRI may benefit from increased polarization at high magnetic field strength of 3 Tesla but is challenged by increased field inhomogeneity. Initial human studies have shown that the radiofrequency (RF) excitation field (B1+) used for signal excitation in the heart is both inhomogeneous and significantly lower than desired, potentially leading to image artifacts and biased quantitative me...

Objective(s):Several studies have been carried out to investigate the effect of various nanoparticles exposed to radiofrequency (RF) waves on cancerous tissues. In this study, a colon carcinoma tumor model was irradiated by RF in the presence of gold-gold sulfide (GGS) nanoshells. Materials and Methods: Synthesis and characterization of GGS nanoshells were initially performed. CT26 cells were ...

OBJECTIVE To compare the value of various IgM and IgA rheumatoid factor (RF) tests for the diagnosis of rheumatoid arthritis (RA). METHODS Firstly, the latex test, one global assay (for IgM, IgA, and IgG RF), six IgM, and four IgA RF assays were compared in a particularly challenging situation-that is, with 67 patients with RA, many of whom were latex negative, and 91 non-RA controls, many of...

BACKGROUND Rheumatoid arthritis (RA) is a common autoimmune disease that is associated with progressive disability, systemic complications, and early death. The present study was aimed to investigate the level of immunoglobulin G (IgG) and IgA isotypes and anti-cyclic citrullinated peptide (CCP) antibody and to assess their association with disease severity based on disease activity score (DAS-...

This work is devoted to the prediction of a series of 208 structurally diverse PKCθ inhibitors using the Random Forest (RF) based on the Mold(2) molecular descriptors. The RF model was established and identified as a robust predictor of the experimental pIC(50) values, producing good external R(2) (pred) of 0.72, a standard error of prediction (SEP) of 0.45, for an external prediction set of 51...

The current RF pulse techniques do not take into account the practical implementation using finite resolution in both time sampling and amplitude discretization. Here, we formulate the problem of RF pulse design as a combinatorial optimization problem. The objective function is formulated to minimize the L1 difference between the desired profile and the computed profile using the exact solution...

Introduction: The conversion matrix [1–3], connecting the optical intensity and phase variations at the output of an optical device with their corresponding input values, has been found useful in analysing laser and amplifier noise in analogue optical links and for computing the RF transfer function of various hybrid RF=optical systems. Previous works assumed the optical devices to be character...

Juvenile rheumatoid arthritis (JRA) differs in many aspects from its adult counterpart (Edstrom, 1958); one of the differences is a low incidence of positive sero-reactions for rheumatoid factors (RF) in patients with JRA (Bywaters, Carter, and Scott, 1959; Sievers, Ahvonen, Aho, and Wager, 1963; Ansell, 1966). Although the agglutinating activity of RF was found in different classes of immunogl...

In Magnetic Resonance Imaging (MRI), to achieve sufficient Signal to Noise Ratio (SNR), the electrical performance of the RF coil is critical. We developed a device (microcoil) based on the original concept of monolithic resonator. This paper presents the used fabrication process based on micromoulding. The dielectric substrates are flexible thin films of polymer, which allow the microcoil to b...