نتایج جستجو برای: oscillating dipole
تعداد نتایج: 34751 فیلتر نتایج به سال:
This problem was first solved by Fitzgerald in 1883 [2], one year before Poynting introduced his vector [1], and several years before Hertz [3] calculated the power radiated by a small, oscillating electric dipole (using the Poynting vector). The radiated power flows outwards from the source at the speed of light. Hence, we can relate the (time-average) radiated power P to the (time-average) de...
The singularity of the exact electromagnetic fields is derived to include the ‘source terms’ for harmonically oscillating electric (and magnetic) dipoles, so that the fields will be consistent with the full Maxwell equations with a source. It is shown explicitly, as somewhat expected, that the same δ-function terms for the case of static dipole fields will have to be included in the dynamic cas...
BACKGROUND We aimed to investigate the effect of cell-cell dipole interactions in the equilibrium distributions in dielectrophoretic devices. METHODS We used a three dimensional coupled Monte Carlo-Poisson method to theoretically study the final distribution of a system of uncharged polarizable particles suspended in a static liquid medium under the action of an oscillating non-uniform electr...
We describe a method for integrating analytically, over a circular aperture, the emission from an oscillating dipole inside a dielectric sphere. The model is useful for investigating fluorescence, Raman, or other emission from molecules inside of spherical particles or droplets. The analysis is performed for two cases: (a) the dipole emits from a fixed orientation, and (b) the dipole emits from...
We describe the dipole-dipole interactions between a linear array of optically driven silver metallic nanospheres (MNSs). These model calculations incorporate the full electric field generated by an oscillating dipole and predict several interesting effects due to the retardation of the field. The distribution of the power associated with MNSs along the array shows a strong variation on a scale...
Introduction: Simultaneous fMRI and EEG is an attractive means by which to investigate non-invasively human brain function. The combination of the two techniques offers high spatial and temporal resolution. Furthermore, the two metrics derive from different physical mechanisms (electrical activity and haemodynamics) meaning that their combination may shed light on the process of neurovascular c...
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