![]() ![]() ![]() “Promoting widespread awareness of effective preventive measures is crucial at this time as we are observing significant spikes in cases of COVID-19 infections in many states, especially Florida.” “In addition to providing an initial indication of the effectiveness of protective equipment, the visuals used in our study can help convey to the general public the rationale behind social-distancing guidelines and recommendations for using facemasks,” said Siddhartha Verma, Ph.D., lead author and an assistant professor who co-authored the paper with Manhar Dhanak, Ph.D., department chair, professor, and director of SeaTech and John Frakenfeld, technical paraprofessional, all within FAU’s Department of Ocean and Mechanical Engineering. Without a mask, droplets traveled more than 8 feet with a bandana, they traveled 3 feet, 7 inches with a folded cotton handkerchief, they traveled 1 foot, 3 inches with the stitched quilting cotton mask, they traveled 2.5 inches and with the cone-style mask, droplets traveled about 8 inches. Importantly, uncovered emulated coughs were able to travel noticeably farther than the currently recommended 6-foot distancing guideline. These masks were able to curtail the speed and range of the respiratory jets significantly, albeit with some leakage through the mask material and from small gaps along the edges. However, well-fitted homemade masks with multiple layers of quilting fabric, and off-the-shelf cone style masks, proved to be the most effective in reducing droplet dispersal. Results showed that loosely folded facemasks and bandana-style coverings stop aerosolized respiratory droplets to some degree. By placing these various masks on the mannequin, they were able to map out the paths of droplets and demonstrate how differently they perform. They tested a single-layer bandana-style covering, a homemade mask that was stitched using two-layers of cotton quilting fabric consisting of 70 threads per inch, and a non-sterile cone-style mask that is available in most pharmacies. They tested masks that are readily available to the general public, which do not draw away from the supply of medical-grade masks and respirators for healthcare workers. They visualized droplets expelled from a mannequin’s mouth while simulating coughing and sneezing. Researchers employed flow visualization in a laboratory setting using a laser light sheet and a mixture of distilled water and glycerin to generate the synthetic fog that made up the content of a cough-jet. The rationale behind the recommendation for using masks or other face coverings is to reduce the risk of cross-infection via the transmission of respiratory droplets from infected to healthy individuals. Research from Florida Atlantic University’s College of Engineering and Computer Science, just published in the journal Physics of Fluids, demonstrates through visualization of emulated coughs and sneezes, a method to assess the effectiveness of facemasks in obstructing droplets. ![]() While there have been prior studies on how medical-grade masks perform, data on cloth-based coverings used by the vast majority of the general public are sparse. PRO632401 | Pro-Line Liquid Mask (16 oz.Currently, there are no specific guidelines on the most effective materials and designs for facemasks to minimize the spread of droplets from coughs or sneezes to mitigate the transmission of COVID-19. Up your painting game: get Pro-Line liquid mask today! it works well with both water and lacquer-based paints and dries translucent so you can easily see your drawn out design. To speed things up and for more even coverage, you can also spray the mask through any airbrush or paint gun with a. This premium, environmentally friendly, water-based liquid mask comes in a 16oz bottle with a convenient flip-up spout cap: just squirt some liquid mask into your RC body and brush onto all surfaces and corners with a soft-bristled or foam brush. It conforms to tough-to-reach areas or complex curves with ease, allowing you to precisely cut your livery design and peel color-by-color for a flawless look. Pro-Line Liquid Mask is what you need to take your custom-painted RC bodies to the next level, just like the Pros! Say goodbye to masking tape and bleeding edges! Our liquid mask is ready to spray or brush onto your RC body straight from the bottle with no thinning needed. ![]()
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