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The downward-angled exhaust valve within the oral/nasal cup eliminates dead airspace, preventing the inhalation of CO2 and reducing fogging on the shield's exterior

Alma, for her part, magnifies it, although she is well aware of the weight it represents, both in society and in her life

The one-star association was observed, however, in a sensitivity analysis in which we applied both data restrictions simultaneously (Extended Data Fig

The 1920's were incredibly different times, many years before we knew the dangers of smoking

The system records: Continuous time-series airflow data for the entire session Automated puff detection and segmentation Per-puff metrics including puff duration, puff volume, peak flow rate, mean flow rate, and interpuff interval Total puff count and session duration Aggregate session metrics such as cumulative inhaled volume Raw time-series data can be exported for waveform analysis, while derived puff parameters are available for immediate statistical processing