Quantitative determination of domain distribution in SrTiO3-competing effects of applied electric field and mechanical stress.
Research
RF Safe Research Library
Jan 1, 2010
This neutron diffraction study quantifies how tetragonal structural domains in SrTiO3 redistribute below 105 K under external electric fields and uniaxial mechanical stress. The authors report that electric field and stress act competitively, and that applying both produces complex domain redistribution. The results…
Pressure and magnetic field dependence of valence and magnetic transitions in EuPtP.
Research
RF Safe Research Library
Jan 1, 2010
This laboratory study investigates how magnetic field and pressure affect valence and magnetic transitions in the compound EuPtP. High-field analysis suggests a mixed valence state at low temperature and discontinuous changes in Eu2+ fraction at two transition temperatures. Pressure increases the transition…
Thermodynamic behavior of the XXZ Heisenberg s = 1/2 chain around the factorizing magnetic field.
Research
RF Safe Research Library
Jan 1, 2010
This paper theoretically investigates zero- and finite-temperature behavior of an anisotropic antiferromagnetic Heisenberg XXZ spin-1/2 chain under a transverse magnetic field, focusing between the factorizing and critical fields. It reports an entanglement phase transition at the factorizing field where entanglement…
Electric field gradients in (111)In-doped (Hf/Zr)3Al2 and (Hf/Zr)4Al3 mixed compounds: ab initio calculations, perturbed angular correlation measurements and site preference.
Research
RF Safe Research Library
Jan 1, 2010
This materials-physics study investigated quadrupolar hyperfine interactions of (111)In→(111)Cd probes in polycrystalline Zr4Al3 and Hf4Al3 containing minority (Zr/Hf)3Al2 phases. The authors observed a strong preference of (111)In solutes for the minority (Zr/Hf)3Al2 phases. Ab initio EFG calculations were used to…
Slow relaxation of magnetoresistance in AlGaAs-GaAs quantum well structures quenched in a magnetic field.
Research
RF Safe Research Library
Jan 1, 2010
This study reports slow relaxation of magnetoresistance in selectively doped p-GaAs-AlGaAs structures following application of a magnetic field. The authors emphasize efforts to rule out temperature fluctuation artifacts and state that the main relaxation features remain. They interpret the phenomenon using a…
Nanocrystalline hydroxyapatite bioceramic using microwave radiation: Synthesis and characterization.
Research
RF Safe Research Library
Jan 1, 2010
This engineering/materials study synthesized nanocrystalline hydroxyapatite bioceramic powder using microwave radiation and then characterized the resulting material. The authors report highly crystalline HAp nanopowder with nanoscale size, mixed morphology, and elemental composition consistent with the HAp phase.…
Are people living next to mobile phone base stations more strained? Relationship of health concerns, self-estimated distance to base station, and psychological parameters.
Research
RF Safe Research Library
Jan 1, 2009
This cross-sectional study surveyed 57 participants about perceived proximity to mobile phone base stations, EMF-related concerns, and psychological strain, and also collected saliva biomarkers. Self-declared base station neighbors (≤100 m) showed higher salivary alpha-amylase and higher symptom checklist scores on…
The effect of MRET polymer compound on SAR values of RF phones.
Research
RF Safe Research Library
Jan 1, 2008
This article describes a hypothesis and experimental testing of an MRET polymer compound applied to RF phones. It reports increased dielectric permittivity in water-based solutions and reduced SAR values in a tissue-simulating phantom head. It also reports no significant change in air measurements of phone signals,…
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…
[Microstrip antenna design and system research of radio frequency identification temperature sensor].
Research
RF Safe Research Library
Jan 1, 2008
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…
The effect of GSM-like ELF radiation on the alpha band of the human resting EEG.
Research
RF Safe Research Library
Jan 1, 2008
This double-blind, counterbalanced cross-over study investigated whether extremely low frequency (DC to at least 40 kHz) fields emitted by GSM handsets affect resting EEG. In 72 healthy volunteers, the authors report a decrease in the alpha band during 20 minutes of ELF exposure in the exposed hemisphere only. They…
Coil design considerations for deep-brain transcranial magnetic stimulation (dTMS).
Research
RF Safe Research Library
Jan 1, 2008
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…
Proteomic analysis in human fibroblasts by continuous exposure to extremely low-frequency electromagnetic fields.
Research
RF Safe Research Library
Jan 1, 2007
This in vitro study examined whether continuous extremely low-frequency electromagnetic fields (3 Hz, 4 mT for 3 hours) alter protein expression in human fibroblast cells using proteomics. The authors report that some protein expressions differed between exposed and sham cells. They identify reduced expression (about…
[Evaluation of the occupational risk related to exposure to electromagnetic fields according to the EC Directive 2004/40 EC: exposure during pregnancy].
Research
RF Safe Research Library
Jan 1, 2007
This article addresses occupational EMF exposure during pregnancy in the context of EU Directive 2004/40/EC, emphasizing the need for workplace risk evaluation. It notes that research evidence on pregnancy risks from occupational EMF exposure is currently scarce and inconclusive. The authors also report insufficient…
[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…
Comparison of the effects of continuous and pulsed mobile phone like RF exposure on the human EEG.
Research
RF Safe Research Library
Jan 1, 2007
This study tested whether GSM-like RF exposure affects resting human EEG, focusing on alpha band power and non-linear EEG features. Using a fully counterbalanced cross-over design with 12 participants and a dipole antenna intended to better resemble handset exposure, the authors found no changes after 15 minutes of…
Dependence of RF heating on SAR and implant position in a 1.5T MR system.
Research
RF Safe Research Library
Jan 1, 2007
This phantom study measured RF-induced heating of a stainless steel humerus implant during 1.5T MR imaging while varying SAR, implant angle to B0, and implant position in the RF coil. Temperature rise at implant tips increased linearly with SAR, with larger rises when the implant was parallel to B0. Heating decreased…
Magnetic field switching between the two orbital-ordered states in DyVO3.
Research
RF Safe Research Library
Jan 1, 2007
This Physical Review Letters study investigates phase competition between spin- and orbital-ordered states in a DyVO3 single crystal. The abstract reports reentrant temperature-driven transitions in spin ordering and orbital ordering. It also reports that an applied magnetic field can switch between orbital-ordered…
Mobile phone use and cancer
Research
RF Safe Research Library
Jan 1, 2004
This narrative review discusses potential public health consequences of widespread mobile phone use and the controversy around long-term cancer risks. It states that evidence from epidemiological and experimental studies suggests long-term exposure to mobile phone emissions may be linked to a small to moderate…