Masks
 

Not bad.

Seems like someone here has been saying that for a while now.

hmmm....

Cool pictures of how masks leak...

http://forums.pelicanparts.com/uploa...1593578306.jpg

And that's with visible smoke. Not plumes of little 125nm virus.

Oh wait.. Webb, did you intend this to show how masks attenuate forward velocity of particles?

Point taken, but know that I've never questioned that aspect.

A leaky condom will also slow forward velocity. The question is, how much does that matter?

And again, Covid replicates in the lungs, and escapes the lungs in the air.we breathe.

And, as the article says (and as I keep hammering) These droplets remained suspended in the air until they were dispersed by ambient disturbances. (not fall to the floor 3' away.)

It still seems logical that combining a mask and 6’ separation is worthwhile.

Do virus "cells" float around on their own? Or are they carried in spit particles?

The fact that so many people find it impossible, or are unwilling, to do the 6' distance thing is something that really amazes me; I work in a setting that sees very little foot traffic, but even so, probably 80% of the people that visit find it necessary to get very close when talking, etc., and have to be constantly asked to watch their distance. I've never been one to crowd people I'm talking too, so my sense of personal space is no doubt shaped by that, but I don't understand why some people think it is an unreasonable burden to maintain some space.

Both.

The thing is, only a small proportion of virus cells get caught up in saliva. This virus does not replicate in the mouth, it replicates in the lungs.

SAR1 was more easily stopped because that one had people showing symptoms prior to transmission. (coughing ...)

This Covid 19 went around the world with very little symptoms. IOW, many carriers simply breathing.

Anyway, back to the particle story... We DO NOT have large droplets of spit-clad Covid WITHOUT having large amounts of very small particles of aerosolized Covid.

Yes yes, I know... the big push to stop projectile looggies.. Sure, a bandana will help stop those.



http://forums.pelicanparts.com/uploa...1593619089.JPG

That's not a picture of how masks leak. That's a picture of how a folded cotton handkerchief works in a sneeze and cough simulation.

The best DIY face mask material and fit? Quilting cotton beats bandana, new study suggests

lol, i'm with TRU, that's not a mask. It's a mouth and nose covering. That would nvr pass spec for sure. I think it is just to show diffusion and what an improper material mask does or doesn't do.

^^^. Yes it’s more of what not to do, what doesn’t work more than anything.

virus particles of this type normally "do better" if they are in water

- large droplets of water = droplets

- tiny droplets that stay in the air a long time = aerosol

I won't say that a naked viroid with no water will become inactivated immediately as I've not seen any studies on that...

This virus can replicate anywhere it finds an ACE2 receptor, not just in the lungs.

some take home points from the study:

Loosely folded face masks and bandana-style coverings provide minimal stopping-capability for the smallest aerosolized respiratory droplets.

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. 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.

Importantly, uncovered emulated coughs were able to travel notably farther than the currently recommended 6-ft distancing guideline.

I believe they used a fog machine, not "smoke". Speaking of which, I do wonder if smoking can help here.

---------------------------------------------------------------------------------------
We use a recreational fog/smoke machine to generate tracer particles for visualizing the expelled respiratory jets, using a liquid mixture of distilled water (4 parts) and glycerin (1 part).

The resulting “fog” or “smoke” is visible in the right panel of Fig. 1 and is composed of microscopic droplets of the vaporized liquid mixture. These are comparable in size to the smallest droplets expelled in a cough jet (∼1 µm–10 µm). We estimate that the fog droplets are less than 10 µm in diameter, based on Stokes’ law and our observation that they could remain suspended for up to 3 min in completely still air with no perceptible settling. The laser source used to generate the visualization sheet is an off-the-shelf 5 mW green laser pointer with 532 nm wavelength. A plane vertical sheet is created by passing the laser beam through a thin cylindrical rod (diameter 5 mm) made of borosilicate glass.

Raw', couple of suggestions ... improve the airflow, install a plexiglass barrier, wear a face shield wipe it down often.

CDC also agrees masks are not a substitute for social distancing.

https://images.homedepot-static.com/...5c0df_1000.jpg

I can't believe this is even a discussion. Wear a mask. It helps reduce the spread of a virus.

Raw, this one is for you!
<iframe width="949" height="534" src="https://www.youtube.com/embed/sRZ5RpsytRA" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Sure they do. But they also say is social distancing can't be maintained due to the number of people, wear a mask because it helps reduce the spread of COVID-19. They also say that wearing a mask AND social distancing is the best possible preventative we have right now. So why no do it?

Personally, I wear a simple loose fitting mask but am not convinced it isn't doing more harm than good. For one, I find myself talking louder so others can hear me and it's not even the multi layer mask tightly wrapped around the face, so I can't see how that's not increasing the risk to others, my point being it isn't always a win and this is only one example given there are other considerations like this.

I stopped reading with the first alarmist agenda laden exaggeration:
"The disease has overwhelmed healthcare" - wrong! There have only been spikes is some places for a short period of time. The only way to make a statement like that is to cherry pick your data.

+1

Yeah... given the authors' qualifications, they could have kept the healthcare opinions to themselves but the current "scientific" environment is what it is. Besides that, the airflow study is interesting.

Siddhartha Verm, Manhar Dhanak, and John Frankenfield
Department of Ocean and Mechanical Engineering, Florida Atlantic University, Boca Raton, Florida 33431, USA

Before they started suggesting masks for Gen Pop, I was wearing a tight fitting mask ,double folded, I use to shield my face while hunting. I put a simple paper towel inside doubled up after my wife explained if you can blow out a match at 12" or less, the mask isn't adequate. My doubled up mask failed that test but with a paper towel as an added filter, I couldn't blow the match out at 6". Even the homemade cloth masks are better with a simple paper towel folded and inserted as a filter. This isn't a burdensome thing to do and if you consider the alternative of another shutdown, it's the least costly thing that EVERYONE should do to keep us moving forward.

There was a time when we, as Americans, would identify an enemy and do all we could to defeat that enemy. Well, the enemy has been identified and we're too busying arguing politics and other nonsense to attack this thing head on and defeat it.

Posted for entertainment purposes only

http://forums.pelicanparts.com/uploa...1593642118.jpg

Yes, let's make some masks !

I at least have the ventilation aspect covered - several barrel fans going at all times to try and remain upright in the godawful heat. Plexiglass barrier not realistic in this setting, and a face shield might melt to my face and the ladies would be upset if such a specimen was marred like that!!! :D

There's one goofy bisch that comes by that does just that, CabsSuckBiggly - bisch must think that talking to someone includes leaning in for a kiss. Fackin irks me to the bone (not like THAT! :eek:), but thankfully, he has not been by in several months.

I think you're good unless the virus sprout wings.

Can't help you with the other problem the dilemma ... your life or women, pick one ! :D:D:D

Get rid of the Red Bulls Rawknee!

It's so fookin' hot and humid here now that maybe the virus will have enough sense to fly away on its on (different than, "just suddenly disappear one day" :D) - the "low" tonight is 80, which means it might drop to 80 for ten minutes at about 4 am. One could go outside anytime throughout the night and immediatly start sweating ballz, just standing still! :eek: I'm going to set new personal records for biggly kilowatt consumption; biggly yuuuuugggeeeeee electricity billz for me!

A proper mask will protect you from catching the virus thru the mouth and nose and this is a N95 mask (or higher, like N99 or nanomask) as it filters micron particles. It has the proper fabric/material to do this (spun PP). CDC doesn't want the public to wear them cuz it will cause short supply and is overkill. Social distancing and hygiene is the best method. Just stay away from ppl. Unfortunately we need to eat and going to the grocery store, you meet ppl. The bich is that we have s**theads and yay whoos out here that dont' really care about other ppl. I'm ok if you don't care, just don't act like a dork and go trying to talk to ppl or spit or sneeze without covering up, that is just rude. I know it's a free country but we still have decorum and a sense of politeness in public. Enuf of that soapbox. For compromised immune systems, i wouldn't take a chance, i'd wear a n95. If you don't have a compromised system a simple surgical mask will prevent you from spreading it. Get the 4 ply mask, not the cheapie 2 ply at the dollar store or 3 play at Menards. The best bet is to be smart and stay away from crowds, especially crowds indoors. BTW the interesting part is if you look up the 3M made N95 mask, it actually says "not for medical use" WTF?

Sneezing with a mask on is like *****ting your pants with your face :confused:

The meme directly above being a perfect example. :)

If only that statement was accepted by everyone.

I rest my case.... " Woman who coughed at two paramedics and said 'I have the virus' is jailed for six months"

and did y'all noticed I purposely said "we" as in apolitical, a-religous, a-Culture-al and a-weapon? you can still believe in all of that and still have decorum and a sense of politeness in public.

Wearing a mask is not a substitute for social distancing.