Publications by authors named "W S Joseph"
The advancement of cellular networks requires updating measurement protocols to better study radiofrequency electromagnetic field (RF-EMF) exposure emitted from devices and base stations. This paper aims to present a novel activity-based microenvironmental survey protocol to measure environmental, auto-induced downlink (DL), and uplink (UL) RF-EMF exposure in the era of 5G. We present results when applying the protocol in Switzerland.
View Article and Find Full Text PDFOccupational exposure limit values (ELVs) for body internal electric fields can be derived from thresholds for action potential generation. These thresholds can be calculated with electrostimulation models. The spatially extended nonlinear node model (SENN) is often used to determine such thresholds.
View Article and Find Full Text PDFA low-cost, tri-axial 50 Hz magnetic field monitoring sensor was designed, calibrated and verified. The sensor was designed using off-the-shelf components and commercially available coils. It can measure 50 Hz magnetic fields originating from high-voltage power lines from 0.
View Article and Find Full Text PDFNonlinearities and timescales in neural models of temporal interference stimulation.
Bioelectromagnetics
January 2025
Article Synopsis
- Temporal interference (TI) stimulation involves the interaction of two sinusoidal electric fields with different frequencies, revealing that neuronal cells respond differently to TI compared to purely sinusoidal signals.
- This study employs computational models to simulate how different neuron models—Hodgkin-Huxley, Frankenhaeuser-Huxley, and various integrate-and-fire models—respond to these signals, finding that HH and FH models accurately replicate observed neural responses while IF models do not.
- Key findings indicate that modifications to ion gate dynamics in the FH model can affect firing thresholds and highlight the importance of ion channels in shaping neuronal responses, contributing valuable insights into the biophysics of neurons and the mechanisms of TI stimulation.
Introduction: Topical antifungals for toenail onychomycosis must penetrate the nail to deliver an inhibitory concentration of free drug to the site of infection. In two ex vivo experiments, we tested the ability of topical antifungals to inhibit growth of Trichophyton rubrum and Trichophyton mentagrophytes, the most common causative fungi in toenail onychomycosis.
Methods: Seven topical antifungals were tested: three U.