New PDF release: Death of a Pirate: British Radio and the Making of the

By Adrian Johns

ISBN-10: 0393341801

ISBN-13: 9780393341805

While the pirate operator Oliver Smedley shot and killed his rival Reg Calvert in Smedley’s nation cottage on June 21, 1966, it was once a turning aspect for the outlaw radio stations dotting the coastal waters of britain. located on ships and offshore forts like Shivering Sands, those stations blasted away on the high-minded BBC’s broadcast monopoly with the recent beats of the Stones and DJs like Screaming Lord Sutch. For free-market ideologues like Smedley, the pirate stations have been entrepreneurial efforts to undermine the turning out to be British welfare country as embodied via the BBC. The worlds of excessive desk and underground collide during this riveting historical past.

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Extra resources for Death of a Pirate: British Radio and the Making of the Information Age

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This will be done in the next section. 3 Quasi-Monochromatic Plane Waves To this point, the description of the polarization properties of electromagnetic waves applies only to strictly monochromatic waves. The problem is how to modify the results to allow for a finite frequency interval. Both the electric and the magnetic field intensity of the wave at a given fixed position can then be expressed by an integral of the form ∞ a(ν ) cos[φ (ν ) − 2πν t] dν . 40) has precisely the form of a Fourier integral.

The phase difference δ is important in several respects. Its sign determines the sense in which the wave vector is rotating. If sin δ > 0 or equivalently tan χ > 0, the polarization is called right-handed; conversely sin δ < 0 or tan χ < 0 describes left-handed elliptical polarization. For right-handed polarization, the rotation of the E vector and the direction of propagation form a right-handed screw. This convention is the one generally adopted in microwave physics and modern physical optics.

Ex ∂ Ey ∂ Ez + + =0 ∂x ∂y ∂z and ∂ Hx ∂ Hy ∂ Hz + + = 0. 39) this results in ∂ Ez =0 ∂z ∂ Hz =0 ∂z and . 7) we similarly obtain ∂ Ez =0 ∂t ∂ Hz =0 ∂t and . 41) Therefore both the longitudinal components Ez and Hz must be constant both in space and time. 42) that is, the plane electromagnetic wave in a nonconducting medium is transverse (Fig. 2). 29)]. 7) which differ from zero are ∂ Ex μ ∂ Hy =− , ∂z c ∂t ∂ Ey μ ∂ Hx = , ∂z c ∂t and ∂ Hx ε ∂ Ey = , ∂z c ∂t ∂ Hy ε ∂ Ex =− . 37) for plane harmonic waves, we find iωμ ∂ Ex μ = i kEx = − H˙ y = Hy , ∂z c c ∂ Ey μ iωμ = i kEy = H˙ x = − Hx , ∂z c c Fig.

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Death of a Pirate: British Radio and the Making of the Information Age by Adrian Johns


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