Archive

1535 posts

Showing results for: ST

Simulations of magnetic field generation in unmagnetized plasmas via beat-wave current drive.

Research RF Safe Research Library Jan 1, 2012

This paper reports the scientific basis and 2D electromagnetic particle-in-cell simulation results for magnetizing an initially unmagnetized plasma using beat-wave current drive. Simulations across different angles between injected waves show beat-wave generation consistent with theoretical predictions and reveal…

Ground-state structures and structural transitions in a monolayer of magnetic dipolar particles in the presence of an external magnetic field.

Research RF Safe Research Library Jan 1, 2012

This physics study uses analytical calculations and Monte Carlo simulations to determine ground-state structures of monodisperse ferrofluid monolayers under external magnetic fields. It reports structural transitions depending on whether the field is perpendicular or parallel to the monolayer plane, with different…

Non-Markovian stationary probability density for a harmonic oscillator in an electromagnetic field.

Research RF Safe Research Library Jan 1, 2012

This paper presents a theoretical calculation of the stationary probability density for a harmonic oscillator embedded in an electromagnetic field by solving the Fokker-Planck equation exactly. The magnetic field is treated as constant, while the electric field is modeled as an external stochastic force with…

Evaluation of the packaging and encapsulation reliability in fully integrated, fully wireless 100 channel Utah Slant Electrode Array (USEA): Implications for long term functionality.

Research RF Safe Research Library Jan 1, 2012

This engineering study evaluated long-term encapsulation and packaging reliability of a fully wireless 100-channel Utah Slant Electrode Array system in vitro. The device was soaked in PBS for over 12 months while being wirelessly powered/configured at 2.765 MHz and transmitting an FSK-modulated 900 MHz RF signal. The…

New insights into bioprotective effectiveness of disaccharides: an FTIR study of human haemoglobin aqueous solutions exposed to static magnetic fields.

Research RF Safe Research Library Jan 1, 2012

This in vitro FTIR study examined human haemoglobin aqueous solutions exposed to a 200 mT static magnetic field for 3 and 7 hours, with and without the disaccharides sucrose and trehalose. The authors report spectral changes (amide A decrease and reduced CH(3) stretching) in haemoglobin dissolved in bi-distilled…

Electric Field Controlled Self-Assembly of Hierarchically Ordered Membranes.

Research RF Safe Research Library Jan 1, 2012

This in vitro study examined how an externally applied electric field influences the self-assembly of oppositely charged molecules in water into an ordered membrane. The authors report that electric fields changed the kinetics of membrane formation and altered membrane thickness, nanofiber growth orientation, and…

Low-frequency electromagnetic fields do not alter responses of inflammatory genes and proteins in human monocytes and immune cell lines.

Research RF Safe Research Library Jan 1, 2012

This in vitro study examined whether low-frequency electromagnetic fields (a complex multiple waveform field and a 50 Hz sine wave) alter inflammatory gene and protein responses in human immune cells. Across time course experiments in THP-1 cells and primary monocytes/macrophages, the authors report no significant…

The mobile phone as a tool in improving cancer care in Nigeria.

Research RF Safe Research Library Jan 1, 2012

This study evaluated mobile phone use as a tool to improve cancer care follow-up and communication in a low-resource Nigerian setting. Among 1176 oncology patients, sustained follow-up at 24 months was reported as much higher in those receiving the phone intervention than in those who did not. Patients also reported…

A robotic assistant for trans-oral surgery: the robotic endo-laryngeal flexible (Robo-ELF) scope.

Research RF Safe Research Library Jan 1, 2012

This paper describes an engineering/clinical tool development effort: the Robotic EndoLaryngeal Flexible (Robo-ELF) Scope System for manipulating flexible endoscopes in laryngeal surgery. The system includes multiple degrees of freedom, a passive positioning arm, and a custom joystick controller enabling one-handed…

Allergic contact dermatitis caused by a cell phone cover.

Research RF Safe Research Library Jan 1, 2012

This case report describes allergic contact dermatitis attributed to a cell phone cover that was advertised as silicone only. Patch testing with the cover material confirmed the diagnosis, and additional patch testing showed reactions to multiple plastics/glues allergens. The authors suggest that as phone cover use…

Peripheral pulsed electromagnetic fields may reduce the placebo effect in migraine patients that do not respond to the sham intervention in a randomized, placebo-controlled, double-blind, cross-over clinical trial.

Research RF Safe Research Library Jan 1, 2012

This randomized, placebo-controlled, double-blind, cross-over trial evaluated a wrist-applied PEMF bracelet in 18 migraine patients and examined possible modulation of placebo effects. In the overall group, both PEMF and placebo were associated with similar reductions in migraine frequency and intensity. The authors…

Long-term digital mobile phone use and cognitive decline in the elderly.

Research RF Safe Research Library Jan 1, 2012

This 4-year cohort study in 871 non-demented older Chinese adults examined frequent digital mobile phone use and changes in cognitive performance. The authors report no significant harmful association between phone use and cognitive functioning. They note users tended to have characteristics linked to better…

Application of an induced field sensor for assessment of electromagnetic exposure from compact fluorescent lamps.

Research RF Safe Research Library Jan 1, 2012

This study investigates instrumentation and procedures to assess electromagnetic exposure from compact fluorescent lamps (CFLs) by measuring both incident and induced fields in the 10 kHz–1 MHz range. For some CFLs, incident electric fields exceeded ICNIRP reference levels at close distances, but induced fields were…

Influence of magnetic field on aqueous two-phase extraction of horse ferritin in the polyethylene glycol/hydroxyethyl starch system.

Research RF Safe Research Library Jan 1, 2012

This study reports an aqueous two-phase extraction method for equine spleen ferritin using polyethylene glycol (PEG) and hydroxyethyl starch (HES). Ferritin partitioning depended on PEG/HES concentrations and PEG molecular weight, and applying a magnetic field increased ferritin accumulation in the PEG-rich phase…

Effects of radiofrequency radiation exposure on blood-brain barrier permeability in male and female rats

Research RF Safe Research Library Jan 1, 2011

This rat study tested whether acute exposure to 0.9 and 1.8 GHz continuous-wave radiofrequency radiation alters blood-brain barrier permeability. Using Evans-blue/albumin as a tracer, the authors report no BBB leakage in exposed female rats but a significant increase in albumin in exposed male rat brains versus sham.…

Radiofrequency waves with filling and peeling substances: An innovative minimally invasive technique for facial rejuvenation.

Research RF Safe Research Library Jan 1, 2011

This pivotal clinical trial describes a minimally invasive facial rejuvenation procedure combining fillers, biorevitalization, peeling, and intradermal radiofrequency delivered by the Spherofill Medical Plus device. In 112 patients divided into five groups, GAIS scores showed statistically significant improvement…

Comparison between different thickness umbrella-shaped expandable radiofrequency electrodes (SuperSlim and CoAccess): Experimental and clinical study.

Research RF Safe Research Library Jan 1, 2011

This experimental and clinical study compared two umbrella-shaped expandable radiofrequency ablation electrodes (SuperSlim vs CoAccess) across different ablation algorithms. In ex vivo bovine liver, CoAccess generally produced larger ablation areas and required longer ablation times than SuperSlim, with no…

Effects of chain stiffness and salt concentration on responses of polyelectrolyte brushes under external electric field.

Research RF Safe Research Library Jan 1, 2011

This paper reports molecular dynamics simulations of polyelectrolyte brushes subjected to external electric fields, focusing on how chain stiffness and salt concentration affect responses. The simulations suggest higher salt concentrations strengthen an induced opposing field from ion redistribution, which resists…

Influences of electric field on living cells in a charged water-in-oil droplet under electrophoretic actuation.

Research RF Safe Research Library Jan 1, 2011

This experimental study examined whether strong electric fields used for electrophoretic actuation of charged water-in-oil droplets affect living cells inside the droplets. Using Trypan blue and cell growth tests across electric field strengths of 1–3 kV/cm and varying actuation times, the authors report no…

A handheld preconcentrator for the rapid collection of cancerous cells using dielectrophoresis generated by circular microelectrodes in stepping electric fields.

Research RF Safe Research Library Jan 1, 2011

This engineering study describes a handheld microfluidic preconcentrator that uses dielectrophoresis generated by circular microelectrodes with a stepping electric field. Numerical simulations were used to illustrate the electric-field concept. In experiments, HeLa cells were reportedly preconcentrated within 160…

Short-term effects of pulsed radiofrequency on chronic refractory cervical radicular pain.

Research RF Safe Research Library Jan 1, 2011

This small clinical study evaluated pulsed radiofrequency applied to the cervical dorsal root ganglion in patients with chronic refractory cervical radicular pain. Pain (VAS) and disability (NDI) improved over 3 months, with most patients reporting ≥50% pain relief and satisfaction at follow-up. No adverse effects…

Correction of microcirculatory disturbances with terahertz electromagnetic radiation at nitric oxide frequencies in albino rats under conditions of acute stress.

Research RF Safe Research Library Jan 1, 2011

This animal study reports that terahertz electromagnetic irradiation at nitric oxide (NO)-related frequencies (150.176150.664 GHz) corrected peripheral microcirculatory disturbances in albino rats experiencing acute immobilization stress. The abstract frames the effect as a correction of stress-related peripheral…

Experimental study of relationship between biological hazards of low-dose radiofrequency exposure and energy flow density in Spirostomum ambiguum infusoria exposed at a mobile connection frequency (1 GHz).

Research RF Safe Research Library Jan 1, 2011

This experimental study exposed Spirostomum ambiguum infusoria to 1 GHz radiofrequency fields at 5 and 50 μW/cm² and reports reduced motor activity. The effect was described as threshold-like, appearing after a certain exposure duration and not increasing with longer exposure. The authors report different 'safe'…

Hematological and toxicogenomic effects of ferromagnetic screening of natural electromagnetic fields.

Research RF Safe Research Library Jan 1, 2011

This rat study tracked hematological and toxicogenomic aftereffects over 45 days following 2 days of ferromagnetic screening of natural electromagnetic fields. The authors report leukopenia at day 14 and increases in genomic instability markers (aneuploidy and polyploidy) in male leukocytes persisting after screening…

Milk processed by pulsed electric fields: evaluation of microbial quality, physicochemical characteristics, and selected nutrients at different storage conditions.

Research RF Safe Research Library Jan 1, 2011

This study evaluated pulsed electric fields (PEF) as a pasteurization method for raw skim and whole milk across multiple treatment intensities and storage conditions. The abstract reports only minor changes in physicochemical properties and small decreases in some composition measures under stronger treatments.…

← Prev Page 53 / 62 Next →