During expiration, the carbon dioxide (CO2) levels inside the dead space 534 of a filtering facepiece respirator (FFR) increase significantly above the ambient concentration.To reduce the CO2 concentration inside the dead space, we attach an active lightweight venting system (AVS) comprising a one-way valve, a blower and a battery in a housing to a
As construction projects increase in complexity, there are growing challenges with conventional monitoring methods in terms of efficiency, safety, and competitiveness.Traditional supervision techniques are labour-intensive, intermittent, and Jodhpurs prone to errors.Hence, this study statistically evaluates the potential advantages of photogrammetr
The growing use of smartphones is actuating the need for better protection.Practically, smartphone users are often not adequately alert when it comes to protection of their credentials stored in the phones, even if they are very much concerned about security, reliability and privacy.To efficiently reduce smartphone vulnerability, an appropriate aut
Autonomous systems are these systems which power themselves from the available ambient energies in addition to their duties.In the next few years, autonomous systems will pervade society and they will find their ways into different applications related to health, security, comfort and entertainment.Piezoelectric harvesters are possible energy conve