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  • THE LOWER PARTS OF THE UTERUS DURING THE FIRST STAGE OF LABOUR IN OCCIPITO ‐ ANTERIOR VERTEX PRESENTATION
    The apparatus consists of a sine wave oscillator, a pair of strain gauges, forming a part of an AC bridge amplifier and a demodulator, connected via a low-pass filter to the output stages of an Elema-Jarnh .
  • A study of experimental acute lung injury in pigs on zero end‐expiratory pressure
    The _V, volume, Pes and Pao signals were amplified ( AC bridge amplifier - ABC module; Raytech Instruments, Vancouver, BC, Canada), low-pass filtered at 50 Hz, sent to a 16-bit analog-to-digital converter (Direc Physiologic Recording system; Raytech Instruments .
  • Respiratory mechanics during and after anaesthesia for major vascular surgery
    The flow and pressure signals were amplified ( AC Bridge Amplifier -ACB module; Raytech Instruments), low-pass filtered at 50 Hz and digi- tised at 100 Hz by a 16-bit analog-to-digital converter (Direc Physiologic Recording System; Raytec Instru- ments).
  • Neurophysiological Techniques
    Saline-filled transducers are driven with an AC bridge ampli- fier (e.g., Bak Electronics ABI-l), typically at a frequency of 25-35 kHz (chosen to be outside the bandpass of interest for neuro- muscular signals).
  • Quantitative analysis of acoustic emission during martensitic transformation of the β-CuZnAl alloy
    The slowly built-up force was measured by a force transducer and AC bridge amplifier while the signal generated due to therapid releaseof force due to the fracture was recorded by a digital oscilloscope.
  • CHEST Journal | Article
    Flow and pressure signals were amplified ( AC Bridge Amplifier -ACB module; Raytech Instruments), filtered (low-pass) at 50 Hz, and digitized at 100 Hz by a 16-bit analog-to-digital converter (Direc Physiologic Recording System; Raytec Instruments).
  • CHEST Journal | Article
    The pressure, volume, and flow signals were amplified ( AC Bridge amplifier -ACB module; Raytech Instruments), low-pass filtered at 50 Hz, and digitized at 100 Hz by a 16-bit analog-to-digital converter (Direc Physiologic Recording System; Raytech Instruments).
  • CHEST Journal | Article
    The airflow, volume, and Pao signals were amplified ( AC bridge amplifier , ABC module; Raytech Instruments; Vancouver, BC, Canada), low-pass filtered at 50 Hz, sent to a 16-bit analog-to-digital converter (Direc Physiologic Recording system; Raytech Instruments) installed on a …
  • CHEST Journal | Article
    The volume and Pao signals were amplified ( AC Bridge Amplifier -ABC module; Raytech Instruments), were filtered through a low-pass filter at 50 Hz, were sent to a 16-bit A/d converter (Direc Physiologic Recording System; Raytech Instruments) connected to a personal …
  • CHEST Journal | Article
    The flow and pressure signals were amplified ( AC bridge Amplifier -ABC module; Raytech Instruments), filtered through a low-pass filter at 50 Hz, sent to an A/D converter (Direc Physiologic Recording System; Raytech Instruments) connected to a personal computer, and sampled at …
  • Respiratory Research | Full text | Upper airway dynamics during negative expiratory pressure in apneic and non-apneic awake snorers
    The flow and pressure signals were amplified ( AC bridge Amplifier -ABC module; Raytech Instruments), filtered through a low-pass filter at 50 Hz, sent to an A/D converter (Direc Physiologic Recording System; Raytech Instruments) connected to an IBM personal computer and sampled …