1,721,066 research outputs found
Overview of bioelectromagnetic interactions models: proposal for a unifying integrated methodology
No full textINVITED PAPE
Signal processing techniques applied to ionic currents data for the extraction of information on electromagnetic coupling
No full text
Real-time 5G exposure system for the electrophysiological experiments on cells
No full textThe rapid development of wireless communications devices has led to the new fifth-generation (5G) signal technology. Simultaneous exposure to a different number of sources of radiofrequency electromagnetic fields (RF-EMF) from the 5G communication networks is ubiquitous, affecting not only workplaces. The available studies on these new frequency bands do not provide adequate and sufficient information for a meaningful safety assessment. Therefore, new in vitro experimental activity is necessary to further investigate the biological effects of RF-EMF exposure
Modeling liposome electroporation by nsPEF. Towards realism
No full textBiomedical applications utilizing nanosecond pulsed electric fields (nsPEF) have demonstrated their ability to induce membrane rearrangement and modulate signaling pathways in biological cells. Proposed advancement in this field involves the activation of liposomes, as smart drug delivery nanocarriers, with nsPEF stimulation. In this work, the authors provide a multiphysics numerical study on liposomes exposed to nsPEF, comparing 2D and 3D models, to fill the gap between simulations and experiments
Portable system for practical permittivity measurements improved by homomorphic deconvolution
No full textThis paper presents a versatile low-cost procedure for complex permittivity measurements of liquids from 400 MHz to 5 GHz. Our procedure uses handheld instrumentation and custom software for data acquisition and postprocessing. The purpose is to replace the benchtop vector network analyzer (VNA) generally used in such applications with a portable and cheaper handheld spectrum analyzer used in the VNA mode. Postprocessing software based on homomorphic deconvolution is used to remove possible inaccuracies in the permittivity spectra coming from the reduced performance of the handheld VNA with respect to benchtop models. Our measurements are evaluated by comparison with those of the National Physical Laboratory (NPL). The results of the real and imaginary parts of the permittivity spectra of two well characterized organic compounds, ethanediol and 2-propanol, are in very good agreement with the NPL reference standards, showing a relative root-mean-square error (RRMSE) always less than 5%. Low values of the RRMSE, together with an expanded uncertainty less than 3%, ensure that our permittivity measurements are repeatable and accurate. Thanks to its versatility, portability, and at least half of the cost of commercial models, our system is suitable for on-site measurements in different applications, including food quality monitoring and control of medical treatments and biological procedure
Modeling channel noise in a Hodgkin-Huxley neuron: stochastic resonance in the detection of electromagnetic fields.
No full textScenarios approach to the electromagnetic exposure. The case study of a train compartment
Full text linkPrevious studies identified the train compartment as the place where people can experience the highest exposure levels (still below the international guideline limits) to electromagnetic fields in the radiofrequency range. Here a possible scenario of a train compartment has been reproduced and characterized, both numerically and experimentally. A good agreement between the simulated electric field distributions and measurements has been found. Results indicate that the higher values of exposure in specific positions inside the train compartment depend on the number of active cell phones, the bad coverage condition, the cell orientation, and the presence of metallic walls. This study shows that the proposed approach, based on the scenarios characterization, may efficiently support the assessment of the individual electromagnetic exposure
- …
