نتایج جستجو برای: electromagnetic field
تعداد نتایج: 842886 فیلتر نتایج به سال:
The structure of the Poincaré group gives, under all conditions, an equation of field helicity which reduces to the Maxwell equations and also gives cyclic relations between field components. If the underlying symmetry of special relativity is represented by the Poincaré group, it follows that the Maxwell equations and the cyclic equations are both products of special relativity itself, and bot...
for many years it was believed that extremely lowfrequency electromagnetic field (elf-emf) do not have any significant biological effects. in this study, the influence of extremely low-frequency electromagnetic fields on the growth performance, serum antioxidant power and gastrointestinal structure of rainbow trout were evaluated. rainbow trout (17-18 g) were exposed to electromagnetic fields (...
the produced electric and magnetic fields due to lightning strikes to mountainous ground are determined in this paper. for the sake of simplicity a cone-shaped ground with finite conductivity is assumed to represent a natural nonflat ground. by this assumption, we deal with an axillary symmetrical structure so we use the cylindrical 2d-fdtd to save the simulation memory and time, dramatically. ...
Background and Objective: Diabetes influences the normal function of the pituitary-thyroid axis. According to the antidiabetic and antioxidant effects of curcumin and the different effects of electromagnetic fields on animal cells, this study was done to evaluate the effect of curcumin and weak low frequency electromagnetic fields on thyroid hormone serum levels in male diabetic rats. Materi...
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