Abstract: Method and circuitry for controlling a transmitter and a receiver of a wireless power transfer system. There is provided transmitter control circuitry for controlling a duty cycle of an inverter of a transmitter of a wireless power transfer system based on detection of a load signal at the transmitter. There is further provided receiver control circuitry for controlling operation of a receiver of a wireless power transfer system, the circuitry modifying of the load at the input or output of a rectifier of a receiver of a wireless power transfer system to vary a load signal at the receiver. The transmitter control circuitry may control the duty cycle of the inverter based on detection of the load signal from the receiver.

Abstract: Alzheimer's disease can be diagnosed in vivo using magnetic resonance imaging. A labeled A&bgr; peptide or its derivative is injected into the patient to be diagnosed, after which the patient is subjected to magnetic resonance imaging. Both pre-amyloid and amyloid plaques can be detected using this method.

Abstract: Alzheimer's disease can be diagnosed in vivo using magnetic resonance imaging. A labeled A&bgr; peptide or its derivative is injected into the patient to be diagnosed, after which the patient is subjected to magnetic resonance imaging. Both pre-amyloid and amyloid plaques can be detected using this method.