Electromagnetic sources

Laser Plasma Acceleration and Related Electromagnetic Sources... 

A variation of the idea of electromagnetic taggants has been proposed, called detonator deactivation. In this concept, a reed switch is connected in series with a detonator bridge wire. Illumination of the detonator by a switchable electromagnetic source would cause the reed to open. A number of methods are possible to ensure that the reed could not be subsequently closed. The advantages of the concept are twofold ... 

These conditions, introduced by Sommerfeld (1912), are called Sommerfeld radiation conditions. We will see below that radiation conditions ensure the obvious physical requirement that the energy of the electromagnetic field travels away from the source domain, i.e. the electromagnetic sources radiate energy outwards from... 

Formula (8.100) has a clear physical interpretation the total energy radiated out of the domain with sources of electromagnetic field, over the time period from the initial field generation until any time t, is always non-negative. Thus, the electromagnetic sources continuously radiate energy outside these. sources ... 

The basic document delivered by these instruments is the NMR spectrum (Figure 15.1), a graph representing signals of resonance. It results from the absorption by the sample of definite frequencies sent by this electromagnetic source. The origin of these spectra, which are quite different from optical spectra, can be best understood by consideration of nuclear spins. 

A related threat is the potential to introduce nanoparticles into the human body or brain without the subject s knowledge. These may remain dormant for hours, or years, until activated by an external electromagnetic source. The particles could then destroy tissue or have other deleterious effects. 

Heller L. and Van Hulstein D.B. Brain stimulation using electromagnetic sources theoretical aspects. Biophys. J. 1992 63 129-138. 

Radiations from nuclear source/electromagnetic source Noise and vibration Material mismatch Reactions Exothermic/endothermic Corrosive and toxic material exposure Loss of containment for liquids and gases Fire and explosion Biological... 

FIG. A-30 How actuators function power-regulated electromagnet. (Source J.M. Voith GmbH.)... 

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