Low-Frequency Electromagnetic Fields Enhance the Directional Migration of Mesenchymal Stem Cells.
Research
RF Safe Research Library
Jan 1, 2025
This in vitro study examined whether low-frequency electromagnetic fields (EMF) affect mesenchymal stem cell (MSC) polarity and directional migration at wound edges. EMF-treated cells showed increased asymmetric redistribution of the polarity marker β-COP and altered γ-tubulin localization at wound margins. The…
Localization of Brain Injuries Using Cranial Electromagnetic Fields.
Research
RF Safe Research Library
Jan 1, 2025
This prospective clinical study evaluated a noninvasive portable helmet system to record and localize brain EMF activity in adults with atraumatic brain injury or TBI, including image-negative concussion. Ten patients were enrolled, and abnormal EMF activity was reported to correlate with neurological deficits, CT…
Fuzzy mobile-robot positioning in intelligent spaces using wireless sensor networks.
Research
RF Safe Research Library
Jan 1, 2011
This engineering study develops and experimentally evaluates a fuzzy-logic method for locating mobile robots in an intelligent space using wireless sensor networks. Localization relies on inter-node range measurements estimated from RF signal strength attenuation, which the authors describe as noisy and unreliable.…
Electronic properties of a graphene antidot in magnetic fields.
Research
RF Safe Research Library
Jan 1, 2010
This paper describes unusual electronic properties of a graphene antidot created by a piecewise constant potential in a magnetic field. It reports near-complete localization of electron probability within the barrier region under some conditions and a symmetry linking antidot and dot states with identical…
Electron dynamics in inhomogeneous magnetic fields.
Research
RF Safe Research Library
Jan 1, 2010
This paper is a review of two-dimensional electron dynamics in microscopically inhomogeneous magnetic fields, focusing on magnetic potentials varying on scales smaller than the mean free path. It covers early work on localization in random magnetic fields, methods to fabricate magnetic potentials, and drift-diffusion…
Electric fields on quasiperiodic potentials.
Research
RF Safe Research Library
Jan 1, 2010
This theoretical condensed-matter study examines how an electric field affects the electronic spectrum and localization in quasiperiodic chains modeled with Harper and Fibonacci potentials. It reports localized ladder spectra under strong fields and smoothing with linearly decreasing gaps under weak fields. When…
Magnetic field delocalization and flux inversion in fractional vortices in two-component superconductors.
Research
RF Safe Research Library
Jan 1, 2009
This theoretical paper analyzes vortex solutions in two-component superconductors within a U(1) x U(1) Ginzburg-Landau framework. It reports that exponentially screened magnetic fields are only found in special cases, while most parameter choices yield delocalized magnetic fields with slowly decaying tails. It also…
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…