i Illustration of the precision testing system Full size image The circuit diagram of this study is shown in Fig. 3g. The Hall voltage is first amplified by an operational amplifier and then converted to a digital signal by an ADC (analog-to-digital conversion) module. The digital signal is...
Cut-away diagram of airflow perturbation mechanism. The screened wheel rotates, allowing screened segments to briefly slow, or perturb, airflow passing through the pneumotachograph. The APD is theoretically similar to both the FOT and the interrupter (INT) techniques in measuring respiratory resistance...
Conceptual diagram of interrelations between COPD and precarious job. SES, socioeconomic status; COPD, chronic obstructive pulmonary disease. Full size image Our study has some limitations. First, despite the significant association between severe-to-very severe AO and precarious job status, the directi...
of building air intakes with a straight filter wall. Air moves right to left, with the evaporative cool cell on the right (a), the primary (b) and secondary (c) filters in the center and the low pressure, high volume axial fans (d) on the left. Note the diagram is not to scale....
Figure 5. Vorticity iso-surface diagram and velocity streamline diagram of different cross-sections: (a) the Z = 1.2 m section of visitor standing up; (b) the X = 0 m section of visitor standing up; (c) the Z = 1.2 m section of visitor walking; (d) the X = 0 m section of vi...