The deformation and breakup of droplets in airflows is important spray atomisation processes, but the shear effect non-uniform airflow rarely reported. In this study, a flow air investigated experimentally using high-speed imaging, digital image processing, particle velocimetry. results show that with strong effect, droplet exhibits unique features due to uplift stretching produced by interacti...

Amid concerns over airflow-induced transmission of the COVID-19 virus in buildings frequented by large numbers people, such as offices, necessity for radiant ceiling heating panels has increased. This is due to concern that airflows emitted from convection systems installed near or windows winter may be a major cause transmission. In this study, we aim evaluate thermal comfort under various ind...

RATIONALE Most patients who develop persistent airflow limitation do so either as a manifestation of chronic obstructive pulmonary disease that is largely related to smoking or as a consequence of persistent asthma. We sought to compare the natural course of lung function associated with persistent airflow limitation in subjects with and without asthma from early to late adult life. METHODS W...

Background The aim of this study was to estimate the occupational burden of airflow limitation, chronic airflow limitation, COPD, and emphysema. Materials and methods Subjects aged 50-64 years (n=1,050) were investigated with forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC). Airflow limitation was defined as FEV1/FVC <0.7 before bronchodilation. Chronic airflow limitatio...

Objective: The nasal cycle, which is present in a significant number of people, is an ultradian side-to-side rhythm of nasal engorgement associated with cyclic autonomic activity. We studied the nasal cycle during REM/non-REM sleep stages and examined the potentially confounding influence of body position on lateralized nasal airflow. Methods: Left- and right-side nasal airflow was measured i...

Spaces with high occupancy density like classrooms are challenging to ventilate and require a lot of energy to maintain comfort. Usually, a compromise is made between low energy use and good Indoor Environmental Quality (IEQ), of which poor IEQ has consequences for occupants’ health, productivity and comfort. Alternative strategies that incorporate elevated air speeds can reduce cooling energy ...

This study investigates the influence of side wind flowing directly from different indoor environments on airflow laboratory fume hood (LFH). When an LFH is used to discharge harmful laboratory, can affect LFH, which likely cause leakage fumes. In this study, incense was simulate fumes, sampling and analysis total suspended particulate concentrations were performed in under conditions with or w...

The Human Powered Centrifuge (HPC) is a facility that is planned to be installed on board the International Space Station (ISS) to enable crew exercises under the artificial gravity conditions. The HPC equipment includes a “bicycle” for long-term exercises of a crewmember that provides power for rotation of HPC at a speed of 30 rpm. The crewmember exercising vigorously on the centrifuge generat...