Theory for nanoparticle retention time in the helical channel of quadrupole magnetic field-flow fractionation.
Research
RF Safe Research Library
Jan 1, 2009
This paper presents a theoretical treatment of nanoparticle retention in quadrupole magnetic field-flow fractionation (QMgFFF) using a helical separation channel. It defines the retention ratio as the ratio of transit times for non-retained versus retained material. Equations are derived for angular and longitudinal…
Sham Transcranial Magnetic Stimulation Using Electrical Stimulation of the Scalp.
Research
RF Safe Research Library
Jan 1, 2009
This study describes development and validation of a sham rTMS approach that combines a matched sham coil (for look/sound) with scalp electrical stimulation (for sensation). In back-to-back comparisons, TMS-naïve participants reportedly could not tell active from sham, whereas experienced participants could. The…
Static magnetic field therapy: a critical review of treatment parameters.
Research
RF Safe Research Library
Jan 1, 2009
This critical review summarizes human research on static magnetic field (SMF) therapy delivered by permanent magnets attached to the skin and evaluates how well studies report SMF dosage and treatment parameters. Across 56 included studies, many did not report essential SMF characteristics (e.g., magnet dimensions,…
Synthesis of polylactic acid-polyglycolic acid blends using microwave radiation.
Research
RF Safe Research Library
Jan 1, 2008
This engineering/materials study describes blending PLLA and PGA using microwave irradiation to produce PLGA-related blends with varying constituent concentrations. The authors report that FTIR, NMR, and DSC measurements indicate blending and cross-linking between the polymers. The abstract does not provide microwave…
Surface-induced nonlinearities of liquid crystals driven by an electric field.
Research
RF Safe Research Library
Jan 1, 2008
This experimental physics study examines how a static electric field affects the optical nonlinearity of methyl-red doped nematic liquid crystals. The authors report that low voltages below the Fredericks transition threshold can change the optical nonlinearity by orders of magnitude. They state that the data fit a…
[Determination of electric field distribution in dielectric barrier surface glow discharge by spectroscopic method].
Research
RF Safe Research Library
Jan 1, 2008
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.…
In vivo quantification of contrast agent concentration using the induced magnetic field for time-resolved arterial input function measurement with MRI.
Research
RF Safe Research Library
Jan 1, 2008
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…
Single access point localisation for wearable wireless sensors.
Research
RF Safe Research Library
Jan 1, 2008
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…
[Assessment of radiofrequency electromagnetic fields levels in the Taranto area].
Research
RF Safe Research Library
Jan 1, 2007
This study reports punctual monitoring of RF electromagnetic fields from radiobase stations in the Taranto area, with measurement campaigns conducted from November 2005 to March 2007. Measurements covered 108 transmitting stations across multiple communication technologies within 100 kHz to 3 GHz. Most monitored…
[Fluorescence spectra analysis of papain treated by pulsed electric field].
Research
RF Safe Research Library
Jan 1, 2007
This in vitro study used fluorescence excitation, emission, and polarization spectra to assess structural changes in papain after pulsed electric field (PEF) treatment. Under the reported PEF conditions (50 kV/cm, 1500 Hz, 40 µs pulses, 19,800 pulses), papain activity decreased by 56.5%. Spectral changes (increased…
[A measurement of spontaneous magnetic field by satellites structures of harmonic spectrum].
Research
RF Safe Research Library
Jan 1, 2007
This study measured satellite structures of second- and third-harmonic spectra reflected from solid targets during femtosecond laser–plasma interactions using an optical multi-channel spectrometer. Red-shifted satellite structures of 2ω0 and 3ω0 were observed, and at ~10^18 W/cm^2 the inferred spontaneous magnetic…
[Reports on electromagnetic field strength measurements issued for occupational health and safety needs in the opinion of radio communication station users].
Research
RF Safe Research Library
Jan 1, 2007
This paper describes a modified approach for assessing occupational EMF exposure during work on radio and television towers and masts, where exposure can be high and tasks/routes are not fixed. The method calculates maximum admissible dwell time at different mast levels while incorporating the EMF dose accumulated…
Biased bilayer graphene: semiconductor with a gap tunable by the electric field effect.
Research
RF Safe Research Library
Jan 1, 2007
This paper reports that the electronic gap in bilayer graphene can be controlled externally via a gate bias (electric field effect). Using magnetotransport (Shubnikov-de Haas) data and a tight-binding model, the authors extract the gap as a function of electronic density. They report tuning the gap from zero to…
The Effectiveness of a Conductive Patch and a Conductive Bed Pad in Reducing Induced Human Body Voltage Via the Application of Earth Ground
Research
RF Safe Research Library
Jan 1, 2005
This engineering-style study measured voltage induced on the human body via capacitive coupling to the environment using a high-impedance measurement head. It then applied earth grounding through a conductive patch and a conductive bed pad. Both grounding methods reportedly reduced coupled 60 Hz mains voltage by at…
20 kHz Magnetic Field Emission of Induction Cooking Heaters
Research
RF Safe Research Library
Jan 1, 2004
This exposure assessment measured 20 kHz magnetic field leakage from induction cooking heaters across four models and compared results with ICNIRP general public limits. The maximum reported magnetic flux density was 16 µT at a specified measurement point using two S-type pans. Field leakage depended on pan size and…