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Artykuły w czasopismach na temat "Ondes millimétriques – Risques pour la santé"
SAHUGUÈDE, Stéphanie, Alassane KABA, Anne JULIEN-VERGONJANNE i Sébastien REYNAUD. "Suivi de paramètres physiologiques en activité sans ondes radio". Trayectorias Humanas Trascontinentales, nr 11 (4.11.2021). http://dx.doi.org/10.25965/trahs.3905.
Pełny tekst źródłaHamdi, Seif Eddine, Jean-Christophe Kneip, Jean-Marie Jouvard, Afaf Afandi i Said Hadj-kaddour. "Imagerie 3D par capteurs à ondes millimétriques pour le contrôle non destructif des assemblages en bois". e-journal of nondestructive testing 28, nr 9 (wrzesień 2023). http://dx.doi.org/10.58286/28474.
Pełny tekst źródłaDeblander, Caroline, Nathalie Schiffino i Louis Eeckhoudt. "Gouvernance et incertitude de la téléphonie mobile". Revue Gouvernance 9, nr 1 (8.02.2017). http://dx.doi.org/10.7202/1038892ar.
Pełny tekst źródłaRozprawy doktorskie na temat "Ondes millimétriques – Risques pour la santé"
Jafari, Seyedfaraz. "Near-field millimeter-wave radio-frequency exposure analysis". Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAT034.
Pełny tekst źródłaThis thesis aims to determine the absorbed power density (APD) considering the coupling and multiple reflections between the antenna and the human body, which poses challenges in assessing APD due to their close proximity.The first part of the thesis explores the concept of measuring APD inside a skin tissue phantom, specifically focusing on its application in 5G technologies.However, measuring APD inside the skin tissue phantom is limited due to the shallow penetration depth of fields at millimeter and quasi-millimeter waves. To overcome this limitation, a reconstruction technique is employed, utilizing the backward plane-wave spectrum(PWS) method. The electric field is sampled at a specific distance within the phantom, enabling the determination of APD at the human skin surface.In the second part, a non-invasive approach based on the dyadic Green's function (DGF) is proposed for APD assessment. This method takes into account the coupling between the human skin model and the device under test (DUT). The entire space is dividedinto two half-spaces : the upper half-space (z > 0) is filled with air, where the antenna is positioned, and the lower half-space is filled with an equivalent human skin liquid or solid. The electric field integral equation (EFIE), based on spatial DGFs, is solved using the method of moments (MoM) to reconstruct the equivalent currents. The electric field is sampled on the surface of a hemisphere surrounding the antenna, and the APD is evaluated based on the reconstructed equivalent currents beneath the air-phantom interface.In addition to the proposed techniques, the thesis investigates the measurement requirements for both approaches, including E-field measurement uncertainty, sampling angular resolution, and the required size of the phantom.The findings demonstrate that the proposed techniques present a novel methodology for assessing APD, taking into consideration the coupling between the human body and the antenna, particularly in the context of exposure to handheld devices operating above 6GHz
Dufailly, Vincent. "Spéciation de l'arsenic dans les produits de la pêche par couplage HPLC-ICP-MS après extraction assitée pas micro-ondes (MAE) : contribution à l'évaluation des risques par l'estimation de sa bioaccessibilité". Paris, AgroParisTech, 2008. http://pastel.paristech.org/5007/01/These2008_vincent_Dufailly.pdf.
Pełny tekst źródłaJomaa, Kassem. "Caractérisation du champ proche électromagnétique et exposition professionnelle aux ondes RF en milieu industriel". Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT111/document.
Pełny tekst źródłaThe analysis of radiated emissions from a source throughout the space, is very essential for both dosimetric and electromagnetic interference analysis. The concerns about the latter are growing because of the need to have prediction of the system reliability of the electronic circuits. Moreover the everyday use of devices and systems emitting radio frequency electromagnetic fields is continuously increasing. Some of these devices are operating in the vicinity of human body, and operators are in the near-field region of the radiating source, and they are exposed to electromagnetic fields. For this reason, dosimetric analysis, that shows the necessity of having three dimensional (3D) field mapping in the vicinity of the radiating source, should be performed. For this kind of applications, several scans of the near fields should be done within different planes in order to build the 3D field mapping. Being a challenging process in electromagnetic compatibility studies, near field characterization is being treated by several algorithms that propose different approaches to achieve the required scanning on the radiating source.In this work, we introduce a 3D scanning system with a low cost three axis magnetic field probes. Having such probes allow the simultaneous measure of the three components of the magnetic field based on a single planner scan above the device under test. The designed probes consist of three orthogonal loops combined together; the first probe contains three conventional loops joined in a plastic cube with a total dimension of 10×12×13 mm3, whereas the second probe is a PCB probe printed on an FR4 substrate of 3.2 mm with a reduced dimension of 9×9×3.2 mm3. The designed probes were calibrated with a TEM cell and the corresponding antenna factors were extracted. The presented scanning system uses an oscilloscope as a measuring instrument that gives the possibility of both time and frequency domain measurements. The second part of this thesis presents a reconstruction algorithm based on plane wave spectrum method. In order to reduce the number of scans and hence the time requirements, the presented algorithm requires just a 2D near field scan of the field components, to reconstruct the 3D magnetic field distribution above the radiating device.The third part of the thesis is devoted for the dosimetric analysis of the radiated electromagnetic fields near RFID systems and RF-welding machines. The near-field exposure assessment of the radiated fields from RFID reader antennas operating at 13.56 MHz and used in Libraries was performed. The measurements of the magnetic field near the antenna were established using the designed probes. The results are then analyzed and compared to the regulations in European Directives and ICNIRP Guidelines. Moreover, the exposure to RF electromagnetic fields of workers near RF-welding machines in industrial environment is studied. These machines, operating at 27 MHz, emit strong radiation and the exposure takes place in the near-field region. The spatial distribution of the electromagnetic fields in this region is studied in both numerical simulations and measurements
Petitdant, Nicolas. "Exploration des effets neuro-toxicologiques des ondes radiofréquences du téléphone portable au cours du développement sain et pathologique chez le rat". Thesis, Paris, AgroParisTech, 2015. http://www.theses.fr/2015AGPT0014.
Pełny tekst źródłaThe widespread use of mobile phones raises the question of the possible health effects of radiofrequency electromagnetic fields (RF EMF, GSM 900 MHz) on the brain. Acquisition of the first cell phone occurs predominantly before adolescence. Scientific literature reports effects of high levels of RF EMF exposure on the expression of the glial fibrillary acidic protein (GFAP). The GFAP is the principal intermediate filament of the astrocytes. These cells play a role in the synaptic transmission and brain damages repair. In this context, we hypothesized a disturbance of the astrocytes and brain functions by the exposure of high RF EMF levels carried out during foetal or adolescent cerebral maturation. A second assumption is made that the organisms under development sensitised by an inflammatory episode would be more vulnerable to the environmental exposures and lead the expression of the neuro-biological effects of RF EMF. To test these hypotheses, we mimicked the foetotoxic effects of a pathological state of the mother. We used a gestational inflammation model of rat obtained with intra-peritoneal injections of lipopolysaccharides (LPS). This model was exposed to RF EMF, either during all gestation (co-exposure with LPS), or during the adolescent stage. In another experimental group, we mimicked a reactive astrogliosis consecutive to an infection or a neuro-pathological state at the adolescent stage by micro-perfusion of LPS in the cerebral ventricle. In this model, adolescent rats were co-exposed to LPS and RF EMF. The different endpoints were measured in the young adult. In gestational co-exposure, endpoints were measured during juvenile and adolescent stages. Behavioural paradigms were used to examine the emotional states, the perception and the adaptation to novelty. The GFAP levels were quantified in the prefrontal cortex, the hippocampus, striatum and amygdala. Our results indicate effects on behavioural endpoints (particularly in novelty perception) in the young adult previously exposed to RF EMF during gestation (and not during adolescence). Only one interaction between the LPS and RF EMF was shown in co-exposure during adolescence. A weaker increase of the GFAP levels was shown after a 1,5W/kg exposure. These results were obtained with levels of RF EMF exposure which were much higher (10 to 50 times) than those induced by the mobile phone held near the foetus by the pregnant woman or near the ear during a phone call. It will be important to reproduce these effects before considering mechanistic interactions of RF EMF on the foetal development and the neuro-inflammatory process at the adolescent stage. In addition, it will be necessary to identify if these effects are induced at environmental RF EMF levels in order to contribute to the neuro-toxicological risk evaluation of RF EMF
Nefzi, Amani. "Analysis and dosimetry of the coupling of electromagnetic waves with biological tissues : application to applicator design for biomedical and study of health effects". Thesis, Limoges, 2021. http://www.theses.fr/2021LIMO0011.
Pełny tekst źródłaThe evolution and increasing use of mobile communications systems was associated with laboratory investigations to study radiofrequency electromagnetic waves exposure safety. In this context, this thesis focuses on the characterization of exposure systems allowinglaboratory in vitro studies on cell models. A dual numerical and experimental approach is implemented to perform the devices dosimetry allowing to determine and control the exposure levels. One of the limitations associated with this dosimetry is due to the micrometric dimensions involved. Therefore, a microscopy technique based on a temperature-dependent fluorescent dye named Rhodamine B was set up and evaluated. This assessment recommends an optimal concentration of the dye at around 50 μM. After calibration, it is possible to estimate the specific absorption rate (SAR) from the temperature variation, even for low levels of SAR (< W / kg) with a spatial resolution of less than ten micrometers i.e. microdosimetry. The two main exposure systems studied, based on microelectrode arrays (MEA), allow the recording of neurons electrophysiological activity. Exposure to electromagnetic waves is achieved simultaneously by inserting these MEAs into TEM cells exposure systems. Dosimetry carried out at 1.8 GHz shows a higher sensitivity of one MEA to its environment. It was shown that the modifications made to the second MEA such as its aperture size and ground planes, have reduced the proximity environment influence. The microdosimetry demonstrated good homogeneity of the SAR between the electrodes with an estimated value of 7 ± 1 W / kgfor 1 W incident power. Finally, a microfluidic exposure device based on a coplanar waveguide was characterized under static conditions
Książki na temat "Ondes millimétriques – Risques pour la santé"
Santini, Roger. Téléphones cellulaires et stations relais: Danger? Les risques pour la santé : arguments scientifiques et conseils pratiques. Embourg: Marco Pietteur, 2001.
Znajdź pełny tekst źródłaEt notre santé, alors?: Perturbateurs endocriniens, ondes électromagnétiques, pesticides, vaccins, OGM. Saint-Julien-en-Genevois: Jouvence éditions, 2015.
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