Air quality plays a significant role during the coronavirus pandemic. acts as spreading media well control measure for infection in polluted spaces. Insufficient ventilation around building may lead to rise of pollutants carrying virus. One way improve is by increasing air change rate. This study investigates rate effectiveness reducing droplets classroom. Cases with various layouts inlet and o...

Background: Weaning from mechanical ventilation in the intensive care unit is an important step in the treatment process. More patients in less than 6 hours after cardiac surgery can be separated from mechanical ventilation and extubated. However, 20-40% of patients after cardiac surgery, due to dysfunctional ventilator weaning response (DVWR), still remain under mechanical ventilation. Therefo...

A biosafety level (BSL) laboratory is a set of biocontainment preventative measures used to prevent and isolate hazardous biological agents or their accidental release in laboratory. It vital provide negative-pressurized environment for disease infection control. The experimental equipment layout may affect the personnel’s exposure infection. However, exhaust air grilles were fixed position thi...

Infectious respiratory diseases are known to have high levels of airborne transmissibility. However, traditional ventilation methods based on perfect mixing often lead the diffusion pathogens. Multi-vent module-based adaptive (MAV) is a method designed meet needs different indoor scenes and reduce air mixing. MAV combines multiple groups multi-vent modules. The vent spacing single module also a...

In the background of COVID-19, new requirements are occurring in novel ventilation systems to mitigate airborne transmission risk indoor environments. this study, two micro-environment systems: personalized combined with radiant panel system (PVRP) and low velocity unit (LVRP) were studied explore potential reducing infection risk. a simulated double layout office, droplets generated by thermal...

INTRODUCTION: The appropriate-use optimization of the limited spaces of the Iranian hospitals is believed to be a crucial step towards promoting the efficiency of these healthcare centers. The issue determining the optimization patterns of the layout of units has led to a lot of efforts by researchers as it increases the efficiency of the hospitals through patients’ improvement, changing the lo...

this paper offers an approach that could be useful for diverse types of layout problems or even area allocation problems. by this approach there is no need to large number of discrete variables and only by few continues variables large-scale layout problems could be solved in polynomial time. this is resulted from dividing area into discrete and continuous dimensions. also defining decision var...

ventilation tube (vt) insertion is the most common otologic operations performed in children, which has great importance in recovery and prevention of hearing loss in children with eustachian tube dysfunction in critical ages of growth development. the location of the vt insertion varies in different studies; the differences are in recovery rates and sequelae of vt insertion. this study is perf...

conclusions pressure support ventilation, but not spontaneous breathing, induces a significant redistribution of ventilation towards the ventral region. the sensitivity of the support trigger appears to influence the distribution of ventilation only during the early phase of inspiration. background in supine position, pressure support ventilation causes a redistribution of ventilation towards t...