نتایج جستجو برای: shielding effectiveness

تعداد نتایج: 332095  

Journal: :Journal of the Japan Society of Powder and Powder Metallurgy 1999

Journal: :IEEE Transactions on Electromagnetic Compatibility 2022

The article investigates the shielding effectiveness (SE) of a metallic enclosure with multilayer composite cover over wide frequency range, from near-field magnetic (1 Hz–1 MHz) to far-field electromagnetic (4–14 GHz). Two enclosures are considered: conductive made aluminum and steel. is trilayer combining thin layer graphene Fe-Ni alloy on either side fiberglass plate. To determine SE these i...

Journal: :international journal of pediatrics 0
vahid karami department of medical physics, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran. mansour zabihzadeh department of medical physics, school of medicine, student research committee, ahvaz jundishapur university of medical sciences, ahvaz, iran and department of clinical oncology, golestan hospital, ahvaz jundishapur university of medical sciences, ahvaz, iran nasim shams department of oral and maxillofacial radiology, school of dentistry, ahvaz jundishapur university of medical sciences, ahvaz, iran saman sarikhani department of radiology, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran.

background: gonad shielding has been recommended during pelvic x-rays since the 1950s. the popular method of gonad shielding is placement a lead shield in the midline of the pelvis. the aim of this study was to evaluate the prevalence and utility of gonad shielding in pediatrics undergoing pelvic x-rays.materials and methodsfollowing study approval, we retrospectively retrieved data from the di...

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