In Section 3, we analyze the case ofindirect government control, i.e., state subsidization of privately owned media. We endoge-nize government control in Section 4, asking when the government would choose to take overprivately owned media. Section 5 extends the model to multiple media outlets.
Small Angle Gradient Echo Methods. The gradient echo technique is generally used in combination with an RF excitation pulse that has a small flip angle of less than 90Ë. We will discover that the advantage of this is that it permits the use of shorter TR values and this, in turn, produces faster image acquisition.
Acceleration factor. The multiplicative term by which faster imaging pulse sequences such as multiple. echo imaging reduce total imaging time compared to conventional imaging sequences such as spin echo. imaging. Acoustic noise. Vibrations of the gradient coil support structures create sound waves. These vibrations are. caused by interactions of the magnetic field created by pulses of the current through the gradient coil with. the main magnetic field in a manner similar to a loudspeaker coil.