Detailed Modeling of the Human Body in Motion to Investigate the Electromagnetic Influence of Fields in a Realistic Environment

• Main Author: Nikolovski, Marija
• Format: Others
• Language: en
• Published: 2018
• Online Access: https://tuprints.ulb.tu-darmstadt.de/7248/1/DissertationFinal.pdf; Nikolovski, Marija <http://tuprints.ulb.tu-darmstadt.de/view/person/Nikolovski=3AMarija=3A=3A.html> (2018): Detailed Modeling of the Human Body in Motion to Investigate the Electromagnetic Influence of Fields in a Realistic Environment.Darmstadt, Technische Universität, [Ph.D. Thesis]

This dissertation focuses on generalization and enhancement of the poser program called “BodyFlex”, in order to be used for deformation of different voxel-based human body models. Different postures of three voxel-based human models, HUGO, Gustav and Laura, can be generated with “BodyFlex”. The first enhancement is related to the Free Form Deformation (FFD) technique, which is already implemented in “BodyFlex”, to allow deformation of non-axis aligned human body parts. Additionally, for deformation of the elbow and body parts which could be initially bent, the Extended Free Form Deformation (EFFD) is implemented. Both techniques deform an object by applying a deformation on a lattice with a predefined shape, which embeds the original object. The first step towards the generalization of “BodyFlex” is the automatic generation of the lattices, based on the joint positions, which is introduced in this work. Another enhancement is related to the generation of a proper posture of the HUGO model for evaluation of the electromagnetic effects from mobile phones. To this aim, an algorithm for separation of the fingers based on geometrical techniques was developed. Two types of electromagnetic applications are described, which include a variety of postures of the human models that are generated by using “BodyFlex”. The first type is related to the analysis of the specific absorption rate (SAR) distribution in the human model, due to mobile phone radiation. In various simulation scenarios, the impact of the human hand’s position, as well as the influence of rings, earrings and eyeglasses on the SAR distribution are presented. The second type studies the influence of the position and the geometry of the human models on the SAR distribution. Three voxel-based human models, HUGO, Gustav and Laura, in a standing and sitting position are exposed to electromagnetic waves. The results for the whole body averaged SAR and the localized SAR distribution of the sitting human models are compared to the standing human models.