Development of a patch antenna array RF coil for ultra-high field MRI.
Research
RF Safe Research Library
Jan 1, 2007
This engineering study describes development of a patch antenna array coil (PAAC) intended to address short RF wavelength challenges in ultra-high-field (≥7T) MRI. A prototype PAAC for 7T proton imaging was used to image a monkey brain. The authors report that the imaging demonstrated the coil's utility for…
Ultranarrow optical absorption and two-phonon excitation spectroscopy of Cu2O paraexcitons in a high magnetic field.
Research
RF Safe Research Library
Jan 1, 2007
This physics study reports ultranarrow optical absorption and two-phonon excitation spectroscopy of Cu2O paraexcitons in a high magnetic field at 1.2 K. A magnetic field enabled observation of an otherwise forbidden paraexciton absorption line and allowed measurement of field-dependent oscillator strength and energy…
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…
Sine-Gordon description of Beresinskii-Kosterlitz-Thouless vortices in superconductors immersed in an external magnetic field.
Research
RF Safe Research Library
Jan 1, 2007
This theoretical paper investigates Beresinskii-Kosterlitz-Thouless vortex physics in two-dimensional superconductors under an external magnetic field using a sine-Gordon field-theory approach. The authors state that the model yields a straightforward definition of field-induced magnetization. They also report that…
A mobile clinical e-portfolio for nursing and medical students, using wireless personal digital assistants (PDAs).
Research
RF Safe Research Library
Jan 1, 2006
This paper outlines the development and evaluation of a wireless PDA-based clinical e-portfolio intended to support reflective clinical learning. The tool synchronized wirelessly via cellular signal or Wi-Fi to a web-based portfolio. An evaluation with nurse practitioner and medical students reported positive…
Electric field-induced astrocyte alignment directs neurite outgrowth.
Research
RF Safe Research Library
Jan 1, 2006
This in vitro study examined whether astrocyte alignment induced by an applied electric field influences neurite outgrowth. Astrocytes were pre-aligned using a physiological-strength electric field (500 mV mm(-1)), and dorsal root ganglia cells were then seeded onto them. Neurite outgrowth at 24 and 48 hours was…
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…
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…
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…
The effect of pulsed and sinusoidal magnetic fields on the morphology of developing chick embryos
Research
RF Safe Research Library
Jan 1, 1997
This animal study reports results from five experimental campaigns over five years examining weak magnetic field exposure and morphological abnormalities in White Leghorn chick embryos. Four campaigns reported statistically significant increases in abnormality rates, while one pulsed-field campaign showed only a…
Bibliography of reported biological phenomena ("effects") and clinical manifestations attributed to microwave and radio-frequency radiation
Research
RF Safe Research Library
Jan 1, 1971
This item is a bibliography of reported biological phenomena and clinical manifestations attributed to radio-frequency and microwave radiation. It compiles over 2000 references published up to June 1971, with supplemental listings through Nov. 21, 1971, and gives particular attention to reported effects in humans.…