Near-Field Induced Polarization Imaging for Optical Data Storage Metrology
It is shown that when the induced polarization is used to acquire near-field induced polarization images, both a high-resolution near-field image and height information of the object are obtained
Gap Servo System for a Biaxial Device Using an Optical Gap Signal in a Near Field Readout System
A readout method using a near field optical head has been proposed as a technique to read out over 30 Gbytes on a 12 cm disc. For the purpose of reading out the RF signal in the system, a gap servo is required to maintain a constant air gap between the solid immersion lens (SIL) and the disc. In this paper, we propose a practical near field readout system with a similar system to an ordinary optical disc, where a biaxial device is used as an optical head actuator and the gap error is detected optically. First, we explain the gap servo system by which it is possible to control the air gap from a far field initial position to a near field target position at a relatively high speed without a head colliding with a disc. Second, we report the result of applying this gap servo system to a 30 Gbyte and a 50 Gbyte ROM disc. Finally, its performance is confirmed by comparing simulated signal with an observed signal.
As práticas profissionais no campo público de atenção à saúde bucal: o caso de dois municípios da Bahia
This paper examines the working facilities and processes of dentists in the primary healthcare systems of two towns in Bahia State, Brazil, striving to analyze the extent to which factors related to dental care, training, placement and professional profiles influence their practices. Semi-structured interviews were conducted with nine dentists in both towns, with work process organization patterns in Municipality C being closer to the structuring principles of Brazil's National Health System than in Municipality E. This seems to be related to management characteristics, with networking links among individual, collective, and preventive clinical activities and planning noted in Municipality C. Despite these differences, the practitioners presented similarities in terms of dual militancy and perceptions of the public and private healthcare fields. The hegemony of the private sector seems to be influencing the professional practices of dentists in the public health system.