Panic buying / stocking up

Yes.

Amusingly enough, and I've posted this before, do you know when motorcycling fatalities had their largest increase in the UK? It was after helmets were made mandatory.



A false sense of security was undoubtedly part of that. Lots more people on the roads, travelling farther meant more total accidents.
Is that due in any part due to the 40 somthings who bough bikes during the 1990s and found them far too powerful ?
The rise was 1973 to 1980 so probably not, no. The 1990s showed an overall decrease in bike deaths but there was a rise in the last part of the decade. Clue's in the graph ;)
Have you taken into account, cheaper more reliable Japanese bikes being bought used? Variables are everywhere
 
Have you taken into account, cheaper more reliable Japanese bikes being bought used? Variables are everywhere
That was the point. If you look at the lines (and not quoting numbers as the scales are totally different) before the helmet law the death line is usually greater than the miles travelled line. After the ban the death line is always lower than the miles travelled line.

Without both lines being shown any effect of the ban is meaningless. Same way that people will quote massive death figures for COVID-19 in the media which are the best accurate projections. However, unless those are compared to the numbers likely to die anyway due to 'natural causes' then there is no real sense of scale.
 
Some info on the protection afforded by masks - the links on the reddit page are to a Bejing co. so no idea where they feature on the accuracy - fairy story scale...

That said, the Brownian motion principle does resonate with what I remember from 'O' & 'A' level physics lessons many years ago.
Ah so what you are saying is what we really need is a really strong cup of tea.....
 

A.N.Other

Old-Salt
Problem with people using these is the filters. People will think they last forever but they dont!
Filters you can buy from Screwfix and builders merchants have the 40mm NATO thread. Civi resperators have standardised on them. For less than a tenner you can face the world and scare the crap out of your neighbours in filtered safety!
 

A.N.Other

Old-Salt
Problem with people using these is the filters. People will think they last forever but they dont!
The charcoal element in the 2 stage filter craps out after a few years. The paper particulate element is still workable. As long as you're not huffing tear gas they're still perfectly usable.
 

A.N.Other

Old-Salt
Would they stop a virus anyway? I am not sure the activated carbon would effect a virus and as a virus is incredibly small (they can only be seen with an electron microscope) the physical filtering might not help much.

Just keep your distance. So the S10 might help by scaring people, or making them think you have a weird fetish.
It's not the virus you filter out. It's the liquid droplets sneezed out and carrying the virus which are the thing to avoid.

N95 is the American standard. It filters out 95% of particulates. The UK equivalent is FFP2, which is 95% particulate filtration. Then you have the N100 / FFP3 filters, which block 99.9999% of particulates. Any well fitted P2 or P3 mask will protect you from the droplets.

The charcoal stage is for gasses, vaporised metals, etc. Charcoal does not stop the virus.
 
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That was the point. If you look at the lines (and not quoting numbers as the scales are totally different) before the helmet law the death line is usually greater than the miles travelled line. After the ban the death line is always lower than the miles travelled line.

Without both lines being shown any effect of the ban is meaningless. Same way that people will quote massive death figures for COVID-19 in the media which are the best accurate projections. However, unless those are compared to the numbers likely to die anyway due to 'natural causes' then there is no real sense of scale.
As you like statistics, on Reddit, US soldier did a mathematical estimate that soldiers were 1.82 times more likely to catch coronavirus

 
As you like statistics, on Reddit, US soldier did a mathematical estimate that soldiers were 1.82 times more likely to catch coronavirus

What, soldiers living close together and doing heavy physical activity near each other are spreading a virus predominantly communicated by coughing and breathing? Compare that to the rest of the country where most people are isolated unintentionally. Colour me surprised.

Not deaths, confirmed tested cases. Is J Stickleberry-Fucknuts getting tested out in the sticks? No. Are Army bases likely to get tested? Yes.
 

OneTenner

LE
Book Reviewer
It's not the virus you filter out. It's the liquid droplets sneezed out and carrying the virus which are the thing to avoid.

N95 is the American standard. It filters out 95% of particulates. The UK equivalent is FFP2, which is 95% particulate filtration. Then you have the N100 / FFP3 filters, which block 99.9999% of particulates. Any well fitted P2 or P3 mask will protect you from the droplets.

The charcoal stage is for gasses, vaporised metals, etc. Charcoal does not stop the virus.
1585351145123.png

In the N, KN and KF system, the number represents the percentage of particles that are blocked by the respirator. This means that a KF80 mask will block about 80% of particles, while an N99 mask blocks around 99% of particles. The European FFPX rating system is a bit more complicated, with FFP1 being 80%, FFP2 being 94% and FFP3 being 99%.
In short, the highest-rated mask you can find is the best. However, finding a mask that fits well without gaps in the seal is most important. (but we all know that)

The best thing I can see coming out of this (once masks / respirators are mandatory) is that hipsters will auto-darwinate and beard oil salesmen will wither and die.

 
It's not the virus you filter out. It's the liquid droplets sneezed out and carrying the virus which are the thing to avoid.

N95 is the American standard. It filters out 95% of particulates. The UK equivalent is FFP2, which is 95% particulate filtration. Then you have the N100 / FFP3 filters, which block 99.9999% of particulates. Any well fitted P2 or P3 mask will protect you from the droplets.

The charcoal stage is for gasses, vaporised metals, etc. Charcoal does not stop the virus.
The bit they don't mention, and I found this out comparing two types of filter, is that 95% means it filters 95% of stuff that is 3 microns in diameter or bigger. If what you are concerned about is smaller than 3 microns then more of it will get through. So we're back to how big is it?
 

Fang_Farrier

LE
Kit Reviewer
Book Reviewer
Not taking the piss - do you know the official UK definition at what size an aerosol becomes classed as droplets?
No idea about UK but it's all we've talked about in dentistry due to our propensity for AGP.

Droplets 5um, travel about 1m, and only contaminate within that range

Aerosol are 1-5um, have a far greater range as they stay airborne for much longer.

Most dental procedures are now classed as AGP, hence why they have pretty much shut us all down, except for us lucky few in public dental service.

Have been involved in setting up Urgent Dental Care Centres (UDCC) as well as Dedicated Covid Urgent Dental Care Centres (DCUDCC)

Other procedures that are classed as AGP include chest compression in CPR. Oh what fun that has caused.
 

Fang_Farrier

LE
Kit Reviewer
Book Reviewer
As you like statistics, on Reddit, US soldier did a mathematical estimate that soldiers were 1.82 times more likely to catch coronavirus

And then ask him to do a second calculation, how likely are they to die from it compared to the general population?

The military is a self selectiing group in that they are for the most part young fit adults who have absolutely no underlying health conditions, as such the risk to them is minimal.
 

A.N.Other

Old-Salt
The bit they don't mention, and I found this out comparing two types of filter, is that 95% means it filters 95% of stuff that is 3 microns in diameter or bigger. If what you are concerned about is smaller than 3 microns then more of it will get through. So we're back to how big is it?
This YouTube video is a review of a civi partical filter with 40mm NATO thread. It has a great explanation of how filters work. He also explains the size of the virus, size of droplets and how the virus is carried by the droplet and blocked by the filter.

Skip forward to 3 minutes 35 seconds for size explication.


Edited for spelling.
 

NSP

LE
Would they stop a virus anyway? I am not sure the activated carbon would effect a virus and as a virus is incredibly small (they can only be seen with an electron microscope) the physical filtering might not help much.

Just keep your distance. So the S10 might help by scaring people, or making them think you have a weird fetish.
Weren't they designed to be for what was then called NBC - Nuclear, Biological, and Chemical...?
 

NSP

LE
The rise was 1973 to 1980 so probably not, no. The 1990s showed an overall decrease in bike deaths but there was a rise in the last part of the decade. Clue's in the graph ;)
Wasn't it the nineties when the government started the TV and newspaper adverts raising awareness in car drivers of approaching motorbikes with right of way at junctions whilst encouraging m/c riders to join the hi-viz generation...?

In the eighties they had the "get yourself seen" (remember the annoying jingle?) campaign to encourage people, especially kids walking home from school in winter, to wear light clothing, reflective sashes and armbands and stuff and it dawned on someone somewhere in Whitehall that it might be sensible to pass that on to cyclists and m/c riders, too - eventually.
 

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