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Eskandari, Ahmadreza,Eskandari, Mohammad Reza The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.1
This paper describes a technique for complete identification of a two-dimensional scattering object and multiple objects immersed in air using microwaves where the scatterers are assumed to be a homogenous dielectric medium. The employed technique consists of initially retrieving the shape and position of the scattering object using a linear sampling method and then determining the electric permittivity and conductivity of the scatterer using adjoint sensitivity analysis. Incident waves are assumed to be TM (Transverse Magnetic) plane waves. This inversion algorithm results in high computational speed and efficiency, and it can be generalized for any scatterer structure. Also, this method is robust with respect to noise. The numerical results clearly show that this hybrid approach provides accurate reconstructions of various objects.
Ahmadreza Eskandari,Mohammad Reza Eskandari 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.1
This paper describes a technique for complete identification of a two-dimensional scattering object and multiple objects immersed in air using microwaves where the scatterers are assumed to be a homogenous dielectric medium. The employed technique consists of initially retrieving the shape and position of the scattering object using a linear sampling method and then determining the electric permittivity and conductivity of the scatterer using adjoint sensitivity analysis. Incident waves are assumed to be TM (Transverse Magnetic) plane waves. This inversion algorithm results in high computational speed and efficiency, and it can be generalized for any scatterer structure. Also, this method is robust with respect to noise. The numerical results clearly show that this hybrid approach provides accurate reconstructions of various objects.
Bioactive Natural and Synthetic Polymers for Wound Repair
Zainab Ahmadian,Hasan Adiban,Marzieh Rashidipour,Mohammad Reza Eskandari 한국고분자학회 2022 Macromolecular Research Vol.30 No.8
Wound healing is a dynamic and complicated process that needs a favorable environment to facilitate healing. Although gauze, lint, plasters, bandages (natural or synthetic), and cotton wool used as primary or secondary dressings to protect the wound from contamination, they have several deficiencies. Thus, modern wound dressings have been designed by the use of natural and synthetic polymers that contribute to wound healing rather than merely covering it. These dressings such as hydrogels, films, and foams are designed to prevent dehydration, control infection and inflammation, and enhance wound healing. In this review article, different natural and synthetic polymers for the preparation of these wound dressings, including hydrogel, film, foam, and smart ones have been discussed. Moreover, the use of natural compounds such as honey and oleoresin for wound healing has been investigated. Hopefully, this review will provide a helpful perspective for future research.