Archive

This laboratory study experimentally examined aggregation of nonmagnetic particles in a magnetic fluid layer under a rotating magnetic field. Particles formed two-dimensional clusters that repeatedly aggregated into larger clusters, producing a broad distribution of cluster sizes. The dynamics were described as…

This clinical study reports outcomes for 34 patients with mild and median OSAHS treated with a combination of functional endoscopic sinus surgery, UPPP, and radiofrequency ablation (RFA). Over 1 year, polysomnography showed a reduction in AHI and an effective rate of 85.29%. Because RFA was used as an adjunct to…

This engineering study reports spectroscopic determination of net electric field distribution in a dielectric barrier surface glow discharge in low-pressure air. Optical emission spectroscopy was used to infer electric field distribution from the intensity ratio of nitrogen spectral lines at 391.4 nm and 337.1 nm.…

This study measured dielectric properties of beef Semitendinosus across 27, 915, and 1800 MHz and temperatures from -5 to 130 °C using an open-ended coaxial probe. The results indicate that frequency, temperature, and muscle fiber orientation influence dielectric constant, dielectric loss, and calculated penetration…

This engineering study used experiments, computer simulations, and simplified analytical calculations to examine how mashed potato dielectric properties and circulating water electrical conductivity affect RF heating at 27 MHz. The authors report that higher circulating water conductivity and higher salt content in…

This computational study investigates magnetic linear response properties of achiral and chiral carbon nanotubes using first-principles electronic structure methods. It computes magnetic shielding inside and outside nanotubes due to electronic currents induced by external magnetic fields applied parallel or…

This engineering-focused paper compares carbon nanotube growth in dense low-temperature plasma versus on a substrate surface using hybrid/Monte-Carlo simulations. It reports that plasma parameters strongly influence ion fluxes and nanotube growth kinetics, with large differences in growth rates and fluxes between…

This engineering study addresses interference between induction-heating cookers and an externally coupled transcutaneous energy transmission system for a totally implantable artificial heart. The authors report that magnetic flux from an IH cooker can couple into the TET transformer and affect system performance. A…

This Medical Physics article presents a phase-based MRI method to quantify paramagnetic contrast agent concentration by inverting susceptibility-induced magnetic field shifts, aiming to improve arterial input function (AIF) measurement in DCE-MRI. After in vitro validation, the approach was applied in vivo in 14…

This engineering paper introduces an RFID sensor network concept integrating RFID with wireless sensor networks and emphasizes the role of antennas. It discusses coil, dipole, and microstrip antennas and reports designing a microstrip antenna for a wireless temperature monitoring and control system. Measurements are…

This engineering-focused conference paper proposes figures of merit to evaluate deep-brain transcranial magnetic stimulation (dTMS) coil designs, focusing on depth penetration, scalp stimulation, focality, and energy. It analyzes circular crown and C-core coils and reports reduced electric-field attenuation with…

This conference paper describes a mobile-phone telemedicine system for managing chemotherapy side-effects at home using symptom diaries and automated alerts to nurses. Six patients used the system for two cycles of oral chemotherapy. The abstract reports two instances where moderate symptoms deteriorated to more…

This engineering study updates a prior (2005) survey on electromagnetic interference (EMI) affecting infusion pumps and extends testing to DECT phones and WiFi terminals. It reports a reduced failure rate for GSM phone exposure compared with 2005 (58% to 30%). The authors report that WiFi and DECT did not pose a real…

This engineering conference paper describes a single access point method for localizing a subject using RF signals from wearable wireless sensors. The approach combines RSSI and LQI measurements from one basestation and applies filtering. The abstract reports that accuracy can approach that of multi-basestation…

This numerical FDTD study modeled RF exposure at 900 and 1800 MHz in tissue containing thin metallic straight wire implants. The model indicates that the wire can substantially increase local SAR, creating high SAR gradients. Despite this, the authors report that exposures below current safe levels resulted in…

This laboratory study evaluated pulsed electric fields (PEF) combined with preheating to inactivate peroxidase (POD) and polyphenoloxidase (PPO) in freshly prepared apple juice. The highest reported inactivation occurred with preheating to 50°C and PEF at 40 kV/cm for 100 μs, exceeding the reductions seen with…

This engineering study evaluates whether passive 13.56-MHz RFID-based chemical sensors can quantify analytes reliably despite repositioning errors between the sensor and pickup coil. Using simultaneous measurement of multiple complex-impedance parameters and multivariate statistical analysis, the authors report…

This engineering study investigated factors affecting current when an electric field is applied in-line in a capillary separation system. Temperature measurements and a replicated cooling setup were used to estimate Joule heating effects, which were reported to be relatively small. In contrast, significant pH shifts…

This chemistry/engineering study reports the synthesis and NMR/MRI-relevant characterization of a trinuclear Gd(III) chelate intended for high-field MRI contrast applications. Using 17O NMR and proton relaxivity across multiple fields and temperatures, the authors infer bishydration, quantify water exchange and…

This paper describes an exposure and microscopy system designed to continuously observe living cells during exposure to modulated RF-EMF similar to mobile phone signals. Using protocols where the same cells serve as controls before and after exposure, the system was validated with endocytosis measurements. Under 900…