Diesel engines have been a mainstay within many industries since the early 1900s. Exposure to diesel particulate matter (DPM) is a major issue in many industrial workplaces given the potential for serious health impacts to exposed workers; including the potential for lung cancer and adverse irritant and cardiovascular effects. Personal respiratory protective devices are an accepted safety measu...

This study compared the simulated workplace protection factors (SWPFs) between NIOSH-approved N95 respirators and P100 respirators, including two models of filtering facepiece respirator (FFR) and two models of elastomeric halfmask respirator (EHR),against sodium chloride particles (NaCl) in a range of 10 to 400 nm. Twenty-five human test subjects performed modified OSHA fit test exercises in a...

This paper addresses different aspects of design process a power source for mechanical respirator. It displays detailed procedure an AC/DC converter boost factor correction as supply DC/DC that powers the also has internal energy source, and algorithm detects absence main low battery voltage. Besides, strategies control schemes are proposed. work suggests digital equations in difference to be i...