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This paper presents a new design scheme that an electronic protractor includes two swing arms and one variable resistor located on the top of swing arms for measuring angles. The variable resistor connects the liquid crystal display (LCD) screen through an angle-to-voltage (A/V) controlled circuit, an analog-to-digital (A/D) converter, a single chip(More)
  • H Y Yang
  • 1989
The issue of public health education regarding mental illnesses has been relatively low profile in the People's Republic of China. A questionnaire study was carried out on 3,028 lay members of the Beijing population to ascertain their knowledge of opinions concerning and attitudes towards the mentally ill. Very few subjects had systematic knowledge about(More)
PURPOSE To determine the diagnostic value of the ganglion cell-inner plexiform layer (GCIPL) thickness in glaucomatous eyes with superior or inferior visual hemifield defects. PATIENTS AND METHODS Eighty-five patients with glaucoma (42 isolated superior hemifield defects and 43 isolated inferior hemifield defects) and 46 normal subjects were enrolled. All(More)
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