Masks - Review & Charcterization
 

Flow regimes characterized

also - silk is good


https://aip.scitation.org/doi/10.1063/5.0029767

Wow. Good find.

I bolded the parts that I've been saying for months.

:)

more bold on what I've been saying

That last bit I hadn't really thought too far on. That when talking with a surgical mask on you have to almost shout thru the mask.

And I have to point out, that while I can follow the math I often wonder why people include it.

A bunch of pedantic approximations to say what a masked guy with a vape pipe can say.


http://forums.pelicanparts.com/uploa...1606622060.jpg

The math is there b/c it is written physicists who like to figure out how fluid flow works.


The paper directly contradicts a number of memes that island has been posting for some time.

Oh webb...

physicists know how fluid flow works. Those eqns are nothing new.

And I'll bite, where are these big contradictions?

That's a very long article. So instead of you scientists bickering, why not decipher and give us the cliff notes and what the skinny is.

I thought that I did.

Of course there is a lot more specificity about the physics, but the take-away is in that vape mask image.

I have been saying for a very long time that this virus does not escape bodies only as spittle - that much smaller aerosols will also be exhaled.

Yes, the study says a surgery mask stops/slows spittle. Yes some spittle will fall just 3 feet away..

Maybe if I had a Paul Harvey The rest of the story line people would hear about the vapor nature of expelled virus. But, too many are focused on one mental model - spittle transmission. They cling to this as the ONLY thing that needs to be considered. :-/

The article is very scientific and all, but doesn't the set of graphs in the attached article shed some doubt on the conclusion that masks are effective? Should we rely on equations and theory, or raw data?

https://swprs.org/face-masks-evidence/#jp-carousel-38978

Yes it does. But it slices and dices the relative fluid (particle) dynamics. Which is fun for some.

Exactly.

I will note that people like the solidarity of mask wearing. - oh look, everyone else is miserable behind a mask too. Then some guy walks along with a bare face and resentment and rage fills the masked minion.

Like Cramer, not wanting to wear the Rrrribbon.

<iframe width="716" height="540" src="https://www.youtube.com/embed/3iV8X8ubGCc" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

I am the only scientist who has posted here.

as the OP noted silk is interesting

LOL

Hey Mr Scientist... Remember when you railed on about how the China virus could not survive without being in some sort of liquid? Yeah, fun times.

island thinks he's an expert in face masks. :rolleyes:

Speaking for what I think eh?

Sounds like Paul Woodbury thinks he's an expert on what island911 thinks.

So Paul, what am I thinking right now? - besides the obvious that you added nothing to this thread but a stupid slight.

:rolleyes: indeed.

Did I touch a nerve? SmileWavy

You chapped his ass. Like a boss.

For Island:

http://forums.pelicanparts.com/uploa...1606695154.jpg

Just curious, what sort of scientist are you? I guess I'm the only other scientist here. (Geologist)

only a fool would misinterpret what I actually said - that isn't far off tho

biology

what kind of geology?

the guy who started off all the 911 wt. data collection was a petrologist

:rolleyes:

Is that what you got out of the OP link?

The problem is, this virus -to use your pissy analogy- is more like a fart than a piss, but you go ahead and think whatever simpleton thing you want, just know that your jeans wont stop your stinky farts.

I am an engineering geologist. I work on construction projects, and study landslides and earthquake faults, etc.

Anyway, we geologists have a way of looking at empirical, approximate data and then making judgement calls, rather than relying on precise formulas, etc. Especially when there's so much uncertainty on a scientific topic. That's why I value some of the empirical raw data on the effectiveness of masks. There; we're back on topic.

Just saw this. Not even close. Maybe try refuting a point next time. d'ya think you can do that?

He thinks he's an expert on everything. :rolleyes:

No article at the link, just a graph of something.
No, we should not rely on raw data. Data has to be reported in context, and it's collection methods and limits of accuracy need to be included. They don't call it "raw" for nothing.

:rolleyes: You are an expert on what? sour grapes?

Like my sig says I put in my 2¢ worth. Just like everyone else here.

island is an expert in:

- telling everyone else that they are wrong.
- responding to every thread about masks.
- Lance Armstrong
- being a troll
- insulting others

Exactly ^
Wow that's a lot of butt-hurt.

We all come here to share information.

What exactly to you add to this world?

Seems that all you share is your hate.

You know island I wrote a pretty sharp response to you and posted it. But after a few minutes I went back and deleted it. You're not changing no matter what me or anyone else says.

I'm not going to engage. SmileWavy

You just did.

And thanks? for letting us know you said something sharp. Real useful.

Here I was trying to be civil and yet you come back with an insult.
Just shows who you really are.
Troll on....

Let's see... U say: "You're not changing no matter what me or anyone else says."
and then;
"Here I was trying to be civil"

So then a "civil" insult hurled my way? :rolleyes:

IOW, if that is you trying to be civil... Try harder. And remember, you are the one who saw an opportunity to pile on with your bullet-point list of insults.

But at least you had zero retort to my on-topic points.

I skimmed this article and found it a bit interesting:

https://sfist.com/2020/11/24/history-reminder-the-1918-flu-came-roaring-back-in-january-in-san-francisco/

Here is the article that preceded the one at the link I provided above:

https://sfist.com/2020/04/27/history-lesson-sf-had-an-anti-mask-league-during-the-1918-flu-pandemic-who-rallied-against-face-masks/

Unignorable.

There are also several books detailing the use or non-use of masks during historical pandemics. If you read them, note that spread of different viruses or bacteria can differ widely. Covid19 isn't weaponized anthrax, but it isn't norovirus either.

Expect more books in the future...

Those articles are garbage.

The 1918 flu did not come "roaring back because people stopped wearing masks". :rolleyes:

Mr. Barmann needs to brush up on his history...

Here Eric - do some reading

https://www.annualreviews.org/doi/abs/10.1146/annurev.med.51.1.407